HAVING SULFIDE LINKAGES

CROSS-REFERENCE TO RELATED APPLICATIONS

[001] The present application claims the benefit of priority from U.S. Provisional Application No, 61/532,275, filed September 8, 201 1 , which is incorporated by reference herein in its entirety.

FIELD OF THE INVENTION

[002] The present invention relates to poiymerizable compositions that include (meth)acrylate functional monomers having at least two sulfide (-S-) linkages in the monomer, and to poiymerizates prepared from such poiymerizable compositions, such as optical lenses and photochromic articles.

BACKGROUND OF THE INVENTION

[003] Polymeric materials, such as plastics, have been developed as alternatives and replacements for silica based inorganic glass in applications such as, optical lenses, fiber optics, windows and automotive, nautical and aviation transparencies. These polymeric materials can provide advantages relative to glass, including, shatter resistance, lighter weight for a given application, ease of molding and ease of dying. Representative examples of such polymeric materials include, poly(methy! methacrylate), polycarbonate and poly(diethylene glycol bis(allyicarbonate)).

[004] The refractive indices of many polymeric materials are generally lower than that of high index glass. For example, the refractive index of poly(diethylene glycol bis(a!Jylcarbonate)) is about 1 ,50, compared to that of high index glass, which can range, for example, from 1.60 to 1.80. When fabricating lenses to correct a given degree of visual defect, for example, a correction for myopia, the use of a polymeric material having a lower refractive index will require a thicker lens relative to a material having a higher refractive index, such as high index glass. If the degree of correction required is substantial, such as in the case of severe myopia, a lens fabricated from a low index polymeric material can become so thick as to negate any benefit of reduction in weight, as compared to an equivalent degree of correction provided by a higher refractive index lens, such as a high refractive index glass lens. In addition, thicker optical lenses generally are not aesthetically desirable, ^' [005] Polymeric materials prepared from the polymerization of monomers containing aromatic rings typically have high refractive indices. Shaped articles, such as optical lenses, prepared from such high index polyaro natic materials, however, generally have lower ABBE numbers (also known as nu-vaiues}. Lower ABBE numbers are indicative of an increasing level of chromatic dispersion, which is typically manifested as an optical distortion at or near the rim of the lens. As such, optical materials having lower ABBE numbers are generally less desirable.

[008] Polymeric materials having a combination of high refractive indices, such as at least 1.57, and low levels of chromatic dispersion (e.g., having ABBE numbers of at least 30), can be prepared from monomers containing certain heieroatoms, such as sulfur atoms. Such polymerizable compositions when polymerized with thermally activated catalysts can, however, undergo erratic and/or excessive rates of polymerization, which result in defects in the resulting polymerizaf.es, such as visible lines, surface defects (e.g., dimples and/or craters), and/or cracks or fissures, within the body and/or through the surface of the polymerizate,

|007j it would be desirable to develop polymerizable compositions that provide desirable optica! properties, such as a combination of high refractive index and reduced chromatic dispersion. It would be further desirable that such newly developed polymerizable compositions are not subject to erratic, and/or excessive rates of polymerization, and poiymerizates prepared therefrom are free of defects resulting from such uncontrolled polymerization.

SUMMARY OF THE INVENTION

[008J In accordance with the present invention, there is provided a polymerizable composition comprising, (a) at least one first (meth)acrylate functional monomer represented by the foiiowing Formula (I),

Formula (I)

With reference to Formula (I), L is selected from at least one of, (i) a multivalent optionally substituted hydrocarbyl group optionally interrupted with at least one of ~C(Q}~, -S-, -O- and combinations thereof, and (ii) a divalent linking group represented by the following Formuia (A),

Formuia (A)

With reference to Formuia (A), Y is O or S, With further reference to Formula (f): L ² is independently for each subscript-n, a divalent optionally substituted hydrocarbyi group optionally interrupted with at least one of -O- and -S-; R is independently selected, for each subscript-n, from hydrogen and methyl; and subscript-n is from 2 to 6, In addition to including the {meth)aryiate functional monomer represented by Formula (I), such poiymerizab!e compositions according to the present invention also, optionally, may comprise, (b) a polymerization moderator,

[009] in further accordance with the present invention, there is provided a polymerizable composition comprising, (a) at least one thio(meth)acrylate functional monomer represented by the following Formula (Si).

00

With reference to Formula (II): L ³ is a multivalent optionally substituted hydrocarbyi group optionally interrupted with at least one of -C(0)-, ~S~, -O- and combinations thereof; R ^s is independently selected for each 1 from hydrogen and methyl; and t is from 2 to 6, In addition to including at least one thio(meth)acry!ate monomer represented by formuia (Ii), the polymerizable composition also comprises (b) at least one (methjacryiate functional monomer represented by the following Formula (III).

(ill)

With reference to Formula (III): L ⁴ is a multivalent optionally substituted hydrocarbyi group optionally interrupted with at least one of -C{0)-, -S-, -O- and combinations thereof; L ⁶ is independently for each u a divalent optionally substituted hydrocarbyi group; R ^a and R ¹⁰ are each independently selected for each from hydrogen and methyl; and u is from 2 to 6. With some embodiments, in addition to including (a) a thio(meth)acrylate f u notions t monomer represented by Formula (If) and (b) a (meth)acrylate functional monomer represented by Formula (Hi), such poiymerizable compositions according to the present invention can also optionally further comprise (c) a polymerization moderator.

[010] in accordance with further embodiments of the present invention, there is provided, a po!ymerizabie composition comprising: (a) at ieast one (meth)acryfate functional monomer represented by the following Formula (iV),

Formula (IV)

With reference to Formula (IV): L ⁶ is selected from a multivalent optionally substituted hydrocarbyl group; L' ^' is independently for each v a divalent optionally substituted

hydrocarbyi group optionally interrupted with at Ieast one of -O- and -S-,

R ¹ is independently selected for each v from hydrogen and methyl,

v is from 2 to 6; and R ¹² is independently for each w divalent optionally substituted

hydrocarbyl. With further reference to Formula (IV), w is 0 to 10, and Z is selected from hydrogen or a group represented by the following Formula (V),

Formula (V)

With reference to Formula (V), R is hydrogen or methyl, in addition to the (meth)acryiate functional monomer represented by Formula (IV), such poiymerizabie compositions according to the present invention can, with some embodiments, optionally further comprise (b) a polymerization moderator.

DETAILED DESCRIPTION OF THE INVENTION

[011 ] As used herein, molecular weight values of polymers, such as weight average molecular weights ( w) and number average molecular weights (Mn), are determined by gel permeation chromatography using appropriate standards, such as poiystyrene standards. 012 J As used herein, poiydispersity index (PDI) values represent a ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the polymer (i.e., Mw/Mn).

|013j As used herein, the term "polymer" means homopo!ymers {e.g. , prepared from a single monomer species), and copolymers (e.g., prepared from at least two monomer species).

[014] As used herein, the term "(meth)acrylate" and similar terms, such as (meth)acry!oyl and (meth)acrylic add ester, means methacry!ate and acrylate.

[015] As used herein, the term "thio(meth)acry|ate ^!! and similar terms, such as thio(meth)acryloy! and†hio(meth)acrylic acid ester, means thiomethacryiate and thioacry!ate.

[016] As used herein, recitations of "linear or branched" groups, such as linear or branched alkyl, are understood to include: a methylene group or a methyi group; groups that are linear, such as linear C ₂ -C ₂₅ alkyl groups; and groups that are appropriately branched, such as branched C ₃ -Cj ₅ alkyf groups.

[017] As used herein, the term "halo" and similar terms, such as halo group, halogen, halogen group, halide, and halide group means F, CI, Br and/or !, such as f!uoro, chloro, bromo and/or iodo,

|0 83 Unless otherwise indicated, ail ranges or ratios disclosed herein are to be understood to encompass any and all subranges or subratios subsumed therein. For example, a stated range or ratio of "1 to 10" should be considered to include any and all subranges between (and inclusive of) the minimum value of 1 and the maximum value of 10; that is, all subranges or subratios beginning with a minimum value of 1 or more and ending with a maximum value of 10 or less, such as but not limited to, 1 to 6.1 , 3.5 to 7.8, and 5,5 to 10.

[019] As used herein, unless otherwise indicated, !eft-to-right representations of linking groups, such as divalent linking groups, are inclusive of othe appropriate orientations, such as, but not limited to, right-to-ieft orientations. Fo purposes of non-limiting illustration, the

O left-to-right representation of the divalent linking group -C o or equivalent^ -

O

C{Q)G~, is inclusive of the rig t- to-left representation thereof, -O c or equivalent^ -0(0)C- or -OC(O)-. [020] As used herein, the articles "a," "an," and "the" include plural referents unless otherwise expressly and unequivocally Iimited to one referent.

[021] Other than in the operating examples, or where otherwise indicated, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as modified in ail instances by the term "about."

[022] The monomers of the compositions of the present invention include groups, such as, but not limited to, multivalent and/or divalent L\ L ² , , t ,. L ^s , L ⁶ , L ⁷ and L ⁸ that can in each case be independently selected from optionally substituted hydrocarbyi. As used herein the term "hydrocarbyi" and similar terms, such as "hydrocarbyi substituent," means; linear or branched C1-C25 alkyl (e.g., linear or branched C-j-Cio alkyl); linear or branched C ₂ - C25 alkenyl (e.g., linear or branched C ₂ ~C ₁₀ alkeny!); linear or branched C ₂ -C ₂₅ aikynyl (e.g., linear or branched C ₂ ~C ₅₀ aikynyl); C3-C18 cycloaikyl, including pofy-fused-ring cycloaikyl, and polycycloalkyi (e.g., C3-C10 cycloaikyl); Cg-C ₈ aryl, including polycyciic or poly-fused-ring aryi (e.g., C ₃ -C ₀ aryi); and C ₆ -C ₂ 4 aralkyl (e.g., C ₆ -C ₁₀ araikyl).

[023J As used herein the term "hydrocarbyi" is inclusive of "heterohydrocarbyi," which is a hydrocarbyi in which at least one carbon, but less than all of the carbons thereof, has been replaced with a heteroatom, such as, but not limited to, G, N, S, and combinations thereof. Examples of heierohydrocarbyls from which a hydrocarbyi can be selected include, but are not Iimited to: C ₃ -Ci _e heterocycioaikyl (having at least one hetero atom in the cyclic ring), including poly-fused-ring heterocycioaikyl, and polycycficheteroalky!; and C5-C18 heteroaryl (having at least one hetero atom in the aromatic ring), including polycyciic or poly-fused-ring heteroaryl,

[02 3 Representative alkyl groups include but are not limited to methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, teri-butyl, pentyl, neopentyf, hexyl, heptyl, octyl, nonyl, decyl, and structural isomers thereof. Representative alkenyl groups include but are not limited to vinyl, al!yl, propenyl, butenyl, pentenyi, hexenyl, heptenyl, structural isomers thereof, related species thereof containing two or more ethylenically unsaturated groups. Representative aikynyl groups Include but are not iimited to ethynyl, 1 -p ^' ropynyl, 2-propynyi, 1-butynyl, and 2-butynyl. Representative cycloaikyl groups include but are not limited to cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cyclooctyl substituents. Representative poly-fused-ring cycloaikyl groups include but are not limited to decahydronaphthalenyl, tetradecahydroanthracenyi, and tetradecahydrophenanthrenyl. Representative polycyclicaikyi groups Include but are not iimited to, bicyclo(2.2.1 jheptanyl (norbornyi), and bicyclo[2.2.2]octanyl. Representative heterocycioaikyl groups include but are not limited to tetrahydrofurany!, tetrahydropyranyi and pipehdinyl, including but not limited to piperidin-4-yi. Representative polycyclicheterocycloajkyl groups include but are not limited to, 7-ihiabicycio 2.2.1]heptanyl, 7~oxabieycio[2.2, 1]heptanyl, and 7-azabicyclo[2.2.1 ]heptanyi. Representative aryi groups include but are not limited to phenyl, biphenyl, naphthyl, anthracenyl, phenanthreny! and triptycenyi. Representative heteroaryi groups include but are not limited to furanyl, pyranyi and pyridinyl. Representative aralkyl groups include but are not limited to benzyl, and phenethyi.

[025} As used herein, the term "optionally substituted" with regard to groups, including but not limited to, hydrocarbyi groups, alky! groups, cycloalkyl groups, and aryi groups, means a group, including but not limited to, a hydrocarbyi group, aikyl group, cycloalkyl group, and/or aryi group, in which at least one hydrogen thereof has been replaced or substituted with a group that is other than hydrogen, such as, but not limited to, halo groups (e.g., F, CI, i, and Br), hydroxy! groups, ether groups, thiol groups, thio ether groups, carboxylic acid groups, carboxyiic acid ester groups, phosphoric acid groups, phosphoric add ester groups, sulfonic acid groups, sulfonic acid ester groups, nitro groups, cyano groups, hydrocarbyi groups (including, but not limited to: a!ky!; aikenyi; aikynyS; cycloalkyl, including poiy-fused-ring cycloalkyl and polycycloca!kyl; heterocycioalky!; aryi, including hydrcxyl substituted ary!, such as phenol, and including poiy-fused-ring aryi; heteroaryi, including poiy-fused-ring heteroaryi; and aralkyl groups), and amine groups, such as -N{R ^{1 ,} )(R ¹² } where R ^{1 1} and R ¹² are each independently selected from hydrogen, hydrocarbyi and substituted hydrocarbyi,

[028] For purposes of non-limiting illustration, the hydrocarbyi, of a substituted hydrocarbyi, can be selected from one or more of the hydrocarbyi groups described previously herein, such as a linear or branched C C ₂ 5 alky! group, which can be substituted with one or more of the substituting groups described previously herein, such as one or more C3-C ₁₂ cycloalkyl groups and/or one or more C ₅ -Ci ₈ aryi groups, for example, an ethyl group substituted with a cyc!ohexyi group and/or a phenyl group.

[027] The optionally substituted groups, including but not limited to, optionally substituted hydrocarbyi groups, optionally substituted alkyf groups, optionally substituted cycloalkyl groups, and optionally substituted aryi groups, from which the various groups described herein can each be independently seiected, such as, but not limited to, multivalent and/or divalent linking groups L ¹ , L ² , l: L ⁴ , L ⁵ , L ⁶ , L ⁷ and L ⁸ can In each case be independently and optionally interrupted with at least one of ~C{0)~, -S-, -O- and combinations thereof, or al least one of -0-- and -S-, as the case may be. As used herein, by interrupted with at least one of -C(O)-. ~S~, and -Q-, or at least one of -O- and -S-, means that at least one carbon of, but !ess than a!! of the carbons of, the optionally substituted group (such as optionally substituted hydrocarbyl groups, optionaf!y substituted alky! groups, optionally substituted cycloalkyl groups, and optionally substituted aryl groups) is in each case independently replaced with one of the recited divalent non-carbon linking groups. The optionally substituted groups {such as optionally substituted hydrocarbyl groups, optionally substituted alkyl groups, optionally substituted cycloalkyl groups, and optionally substituted aryl groups) can be interrupted with two or more of the above recited linking groups, which can be adjacent to each other or separated by one or more carbons. For purposes of non- limiting illustration, a combination of adjacent -C{G)- and -O- can provide a divalent carboxylic acid ester linking or interrupting group, ~C(0)-0-. For purposes of further non- limiting illustration, a combination of adjacent -C(Q}~ and -8- can provide a divalent fhiocarboxy!ie acid ester finking or interrupting group, -C(0)-S-. For purposes of additional non-limiting illustration, a combination of adjacent -0-, -C{Q)- and -O- can provide a divalent carbonate linking or interrupting group, -0~C(Q)~0~,

[028] Additionally or alternatively, as used herein, by interrupted with at least one of -C(Q)~, -S-, and -0-, or at least one of -O- and -S-, means that the various groups from which, for example, multivalent and/or divalent linking groups L ¹ , L ² , L ³ , L ⁴ , L ⁵ , L ⁶ , L ⁷ and L ⁸ can in each case be independently selected, can be separated or interrupted with at least one of -C(G)-, ~S~, and -0-, or at least one of ~Q~ and -3-, as the case may be. For purposes of non-limiting illustration, when L ¹ is selected from, or composed of, two or more groups, such as a multivalent linear or branched optionally substituted C C ₂₅ alky! group and a multivalent optionally substituted C ₃ -C ₁₂ cycloalkyl group, the multivalent groups can be interrupted with at least one of -C(0)-, -S~, -O- and combinations thereof. For purposes of further non-limiting illustration, a linking group, such as L , can, with some embodiments, be selected from both a divalent ethyl group (such as, ethart-1 ,2-diyl, ~CHj-CH ₂ -) and a divalent

cyciohexyl group (such as, cyclohexan-1 ,4-dtyl, ), which can be interrupted by at least one of -G(0)~, -S-, -0- and combinations thereof. For purposes of additional non-limiting illustration, a divale

and a divalent cyciohexyl group (such

interrupted with -S-, can be represented by the following Formula (E), Formu a E)

[029] As used herein, the term "multivalent" with regard to multivalent linking groups, means a group that has at least two covaient bonds that serve to link the linking group to two or more substiiuents or portions of the compound or monomer. As used herein, the term "divalent" with regard to divalent linking groups, means a group thai has two covaient bonds that serve to link the linking group to two substiiuents or portions of the compound o monomer,

[030] The monomers of the poiymerizable compositions of the present invention as described herein, including monomers represented by Formula (i), Formula (SI), Formula (111), Formula (IV) and related monomers, in each case optionally further include one or more coproducts that Include one or more radically poiymerizable ethylenicaliy unsaturated groups, such as, but not limited to oligomers that include one or more radically poiymerizable ethylenicaliy unsaturated groups, resulting from the synthesis of such monomers. The coproducts, such as oilgomeric coproducts, can optionally also be present in the poiymerizable compositions of the present invention.

[031] The poiymerizable compositions of the present Invention, including the monomers thereof, for example as represented by Formula {I}, and the various groups thereof will be described in further detail herein as follows.

[032] With reference to Formula (I), and with some embodiments, L can be selected from multivalent linear or branched optionally substituted C- C ₂₅ alkyl, multivalent optionally substituted C ₃ -C ₁₂ cycloa!kyi, multivalent optionally substituted aryi, and combinations thereof optionally interrupted with at least one of ~C(0)-, -S-, ~0- and combinations thereof. Each group from which L ^! can be selected can itself optionally be interrupted with at least one of -C(0}-, -S-, -O- and combinations thereof.. Additionally or alternatively, and as discussed previously herein, when L ¹ is selected from, or composed of, two or more groups, such as a multivalent linear or branched optionally substituted CrC ₂₅ alkyl group and a multivalent optionally substituted C ₃ ~C ₂ cycloalkyl group, the multivalent groups can be interrupted with at least one of ~C(G)~, -S-, -O- and combinations thereof.

[033] The divalent group of Formula (I), with some embodiments, can be selected from divalent optionally substituted linear or branched Cr C ₂₅ alkyl, divalent optionally substituted C½-C ₁₂ cycioaikyi, divalent optionally substituted aryl, and combinations thereof optionaiiy interrupted with at least one of -O- and -S-.

[034] According to some embodiments, L ¹ of Formuia (!) is selected from multivalent linear or branched CrCio aikyl optionally interrupted with at least one of -0(0}-, -S~ and -0-. in accordance with some additional embodiments, L ² of Formula (!) is Independentiy for each n selected from divalent linear or branched CrCio aik i optionaiiy interrupted with at least one -Q-. Examples of multivalent and divalent alkyl groups from which L ¹ and L ² can each be independently selected, include, but are not limited to, methyl, ethyl, propyl, butyl, peniyl, hexyS, heptyl, oc yl, nonyi, and decyi, including structural isomers thereof,

[035] The multivalent linking group of the first (meth)acrylate functional monomer represented by Formula (I), with some embodiments, is selected from multivalent linear or branched C Ci ₀ aikyl interrupted with at least one -S- group, and n of Formula (I) is 2 or 3. The multivalent linear or branched C1-C10 alkyl groups from which L ¹ can be selected include, but are not limited to, those recited previously herein.

[036] The multivalent U linking group of Formula (I), with some embodiments, is a divalent linking group, n is 2, and L is represented by the following Formuia (B),

Formula (8)

~(R ² ~S) R ³ ~

With reference to Formuia (B), R ² for each p is independentiy selected from divalent linear or branched optionall substituted C C ₀ alkyl, and/or divalent optionaiiy substituted C3-C12 cycioaikyi. With further reference to Formuia (B), R ³ is selected from divalent linear or branched optionally substituted C _r C ₀ alkyl, and/or divalent optionaiiy substituted C3-C12 cycioaikyi, and p is 0 to 10. The divalent alkyl groups from which R ² and R ³ can each be independently selected include, but are not limited to, those described previously herein with regard to I ¹ .

[037] Non-limiting examples of divalent optionally substituted linear or branched alkyl groups from which R ² for each p and R ³ can each be independently selected include, but are not limited to: -CH ₂ -; -CH ₂ CH ₂ -; -CH{Ph)CH ₂ -, where Ph represents optionally substituted phenyl (-C ₆ H ₅ ); -{CH ₂ ) ₃ -; ~CH(CH ₃ )CH ₂ -; ~(CH ₂ ) ₄ -; -CH(CH ₃ )CH ₂ CH ₂ -; -CH ₂ CH(CH ₃ )CH ₂ -; ^« C(CH ₃ ) ₂ CH ₂ -; -(CH ₂ ) ₅ -; -CH(CH ₃ }CH ₂ CH ₂ CH ₂ -; -CH ₂ CH(CH ₃ )CH ₂ CH ₂ -; -C{CH ₃ ) ₂ CH ₂ CH ₂ ~; and -CH ₂ CiCH ₃ ) ₂ CH ₂ -,

£038] Non-limiting examples of divalent optionally substituted cycioaikyi groups from which R ² for each p and R ³ can each be Independently selected include, but are not limited to: cyclopropan-1 , 1-diyS; cyclopropan-1 ,2-diyl; cyciobutan- ,1-diyf; cyclobutan-1 ,2-diyl; cyclobutan-1 ,3-diyi; cyclopentan-1 , 1-diyi; cyciopentan-1 ,2-diyi; cyciopentan-1 ,3-diyl; cyciohexan~1 ,1 -diyl; cyclohexan-1 ,2-diy!; cyciohexan-1 ,3-diyf; and cyclohexan-1 ,4-diyL

[039] With the preceding non-limiting examples of divalent optionally substituted linear or branched alkyi groups and divalent optionally substituted cycloalkyi groups from which R ² for each p and R ³ can each be independently selected, one or more hydrogens thereof can each be optionally and independently substituted or replaced with a group other than hydrogen including, but not limited to, those groups as described previously herein with regard to the term "optionally substituted."

[040] The divalent group L ² of Formula (f) can, in accordance with some embodiments, be represented by the following Formula (C),

Formula (C)

-{R ⁴ -Q) _q ~R ⁵ ~

With reference to Formula (C): R ⁴ for each q is independently selected from linear or branched optionally substituted C C io a!kyl, and optionally substituted C ₃ -Ci ₂ cycloalkyi; R ⁵ is selected from linear or branched optionally substituted C C ₀ alkyi, and optionally substituted C ₃ ~Ci ₂ cycloalkyi; and q is 0 to 10.

[041] Non-limiting examples of divalent optionally substituted divalent linear or branched alkyi groups from which R ⁴ for each q and R ⁶ can each be independently selected include, but are not limited to, those described previously herein with regard to R ² and R ³ , in which one or more hydrogens thereof can each be optionally and independently substituted or replaced with a group other than hydrogen including, but not limited to, those groups as described previously herein with regard to the term "optionally substituted." Non-limiting examples of divalent optionally substituted cycloalkyi groups from which R for each q and R ⁵ can each be independently selected include, but are not limited to those described previously herein with regard to R ² and R ³ , in which one or more hydrogens thereof can each be optionally and independently replaced with a group other than hydrogen including, but not limited to, those groups as described previously herein with regard to the term "optionally substituted."

[042] In accordance with some embodiments, n of Formula (I) is 2, L is represented by Formula (B) and L ² is represented by Formula (C), in which case the first (roeth)acryiate functional monomer can be represented by the following Formula (la):

With reference to Formula (la), R\ R ² , R ³ , R ⁴ , R ⁵ , p, and q are each Independently as described previously herein. The first (meth)acr !ate functional monomer represented by Formula (la) includes at least two sulfide linkages (-S-),

[043] With further reference to Formula (la), and with some embodiments of the present invention: p is 1 ; each q is independently 0 to 10, provided that at least one q is at least 1 ; R ² , R R ⁴ and R ^s are each divalent ethyl,, such as ethan-1 ,2-diyl; and each R ¹ is independently hydrogen or methyl.

|044] With additional reference to Formula (la), and in accordance with some embodiments: p is 1 ; each q Is 0; and R ² , R ³ and R ⁵ are each selected from divalent ethyl, such as ethan-1 ,2-diyl, in which case the first (meth)acrylate functional monomer can be represented by the following Formula (lb):

With reference to Formula (lb), each R is independently selected from hydrogen and methyl, as described previously herein.

[045] With some embodiments, L ¹ of Formula (!) is selected from a trivalent group represented by the following Formula L ¹ (a),

Formula L ¹ (a)

0 CH ₂ O

_____ _R 11 __ c ----- O— CH— C H ₂ — O C R ²

[046] With reference to Formula L ¹ (a), and with some embodimenis, R and R ¹² are each Independently selected from: divalent linear or branched alkyl, such as divalent linear or branched C C _2S alkyl, or divalent linear or branched C C ₀ alkyi, or divalent linear or branched C1-C4 alkyl, or divalent Ci-C ₂ alkyl; divalent cyclic alkyl, such as divalent C ₅ -C _B cyclic alkyl; divalent phenyl, including linear or branched C1-C9 aikyl substituted divalent phenyl When L ¹ is selected from a triva!ent group represented by Formula L (a), n of Formula (I) is 3.

[04?] When L ¹ is selected from a trivalent group represented by Formula L ¹ (a), the first (meth)acryiate functional monomer represented by Formula (I) can be represented by the following Formula (ic):

Formula (Ic)

With reference to Formula (ic), each R ¹ and each L ² are each independently as described previously herein.

[Q48| The first (meth)acrylate functional monomer of the poSymerizabie compositions of the present invention, for example, as represented by Formula (I), can be prepared by art- recognized methods. With some embodiments, and for purposes of non-limiting illustration, the first (meth)acrySate functional monomer represented by Formula (!) can be prepared by reaction of one moie of a poiythioi having n thio! groups (-SH) and at least n moles of one or more oxirane functional materials (and/or one or more cyclic ethers), which results in the formation of a hydroxy! functional intermediate having n hydroxy! groups, where n, in each case, is as described with reference to Formula (I). Examples of oxirane functional materials include, but are not limited to, alkylene oxides, such as ethylene oxide and propylene oxide. Alternatively, the poiythioi can be reacted with a 2-ha!o-1 -hydroxy-aikane, such as 2- chioroethanoi, in accordance with art- re cognized methods. Further alternatively, the poiythioi can be reacted with a 1 ,2-aikylene carbonate, such as ethylene carbonate, In accordance with art-recognized methods. Reaction of the poiythioi with oxirane functional material, or 2-halo-1 -hydroxy-alkane, or 1 ,2-alkylene carbonate, results in the formation of a hydroxy! functional intermediate.

|049] The hydroxy! functional intermediate can then be reacted with a {meth)acry!ic acid ester with the concurrent removal of alcohol, thereby resulting in formation of a first (meth)acryiate functional monomer represented by Formula (I). Alternatively, the hydroxy! functional intermediate can be reacted with a (meth)acryloy! halide, such as (meth)acryloyi chloride, with subsequent work-up procedures to remove the resulting hydrogen haii.de and/or salt thereof. Further alternatively, the hydroxy! functionai intermediate can be reacted with (meih)acryiic anhydride, in accordance with art-recognized methods. The hydroxy! functional intermediate also can be reacted with (meth)acrylic acid with concurrent removal of water, thereby resulting in formation of a first (meth}acryiate functionai monomer represented by Formula (I).

|050] When L is represented by Formula (A), and for purposes of non-limiting illustration, the first (meth)acryiate functional monomer represented by Formula (I) can be prepared by reaction of a carbonic dihalide (when Y of Formula A Is 0} or a carbonoth!oic dihalide (when Y of Formula A is S) with two moles of a thiol functional material represented by the following Formula (F):

Formula (F)

With reference to Formula (F), L ² and R ¹ are each as described previously herein with regard to Formula (i).

[051] Alternatively, when L is represented, by Formula (A), and for purposes of further non-limiting illustration, the first {meih)acrylate functional monomer represented by Formula (!) can be prepared by reaction of N.N-carbonyldiimidazole (when Y of Formula A Is O) or a N,N4hiocarbonyldiimidazole (when Y of Formula A is S) with two moles of a thiol functional material represented by Formula (F).

[052] With reference to Formula (I), and in accordance with some embodiments, n is 2, L ¹ is selected from a divalent linking group represented by Formula (A), and L ² Is represented by the following Formula (B),

Formula {8}

ith reference to Formula (B), R ² for each p, and R ³ are each independently as described previously herein, and p is 0 to 10.

[053] When n is 2, L is represented by Formula (A) and i is represented by Formula (B), and for purposes of non-limiting illustration, the first (meth)aerylate functional monomer represented by Formula (I) can be prepared by reaction of a carbonic dihalide (when Y of Formula A is O) or a carbonothioic dihalide (when Y of Formula A is S) with a dithioi, such as dimercaptodiethylsulfide (which can also be equivaient!y referred to as bis{2-mercaptoethyl)sulfide), which results in the formation of an intermediate dithioi having a -C(O)- or ---C(S)-- linkage in the backbone thereof. The intermediate dithioi is then reacted with two moles of an oxirane functional material, such as ethylene oxide, which results in the formation of di-hydroxy functional intermediate. The di-hydroxy functional intermediate can then be reacted with two moles of a (meth)acrylate with the concurrent removal of a 2 motes of alcohol, which results in formation of a first (meth)acrylate functional monomer. In the preceding general synthetic procedure, the carbonic dibaiide can be replaced with N,N- carbony!diimidazo!e (when Y of Formula A is 0), and/or the carbonothioic dihalide can be replaced with N.N-thiocarbonyldiimidazole (when Y of Formula A is S). With further reference to the preceding general synthetic procedure, the (meth)acryiate reactant can be replaced with a (meth)acpyioyl haiide, such as (meth)acryloyi chloride,

[054] With reference to Formula (i), and with some embodiments, n is 2, and L ¹ is selected from, a divalent linking group represented by the following Formula (D),

Formula (D)

~C(R ⁶ )( R ⁷ }~

With reference to Formula (D), R ⁶ and R ⁷ are each independently selected from hydrogen, linear or branched optionally substituted C Cio a!kyl, optionally substituted C3-C12 cyc!oalkyl, and optionally substituted aryl. Alternatively, R ⁶ and R' together form a C4-C12 optionally substituted cycioalkyl.

[055] With further reference to Formula (I), with some embodiments, when n is 2 and L ¹ is represented by Formula (D), L ² is represented by the following Formula (B),

Formula (B)

-(R -S) _p -R ³ -

With reference to Formula (B), R ² for each p, and R are each independently as described previously herein, and p is 0 to 10.

[056] When, as with some embodiments, L ¹ is represented by Formula (D), L. ² , with some embodiments, is represented by Formula (B), and n is 2, the first (meth)acrylate functional monomer represented by Formula (I) can be represented by the following Formula (Id), Formula (Id)

[057] With reference to Formula (id), R R ² , R ³ , R ⁶ , R ⁷ , and each p are each independentiy as described previously herein. With further reference to Formula (Id), and with some embodiments of the present invention, each R ¹ is independently selected from hydrogen and methyl, R* and R ⁷ are each independently selected from hydrogen and methyl, R ² and R ³ are in each case ethan-1,2-diyi, and each p is independently 1 or 2.

[058] With reference to Formula (I), when L' is represented by Formula (D), L ² is represented by Formula (B), and n is 2, the first (meth)acryiate monomer of the po!ymerizabie compositions of the present invention can be prepared by art-recognized methods. For purposes of non-limiting illustration, a first (meth)acryiate functional monomer represented by Formula (Id) can be prepared in accordance with the following representative Scheme-(A).

Scheme-(A)

[059J With reference to Scheme-(A), R ¹ , R ⁶ , and R ^? are each as described previously herein with reference to, for example. Formula (Id), and R' is a monovalent hydrocarbyl, such as linear or branched CrC ₂₅ a!ky!, or C ₃ -C ₂ cyc!oalkyi. With further reference to Scheme~(A), 1 mote of an aldehyde or ketone (a) is reacted with 2 moles of a di-thioi, such as dimercaptodiethyisu!fide (b) (which can aiso be equivalentiy referred to as bls{2- mercaptoethyl)su!fide), which results in formation of a thiol functional adduct (c). Thiol functional adduct (c) is reacted with 2 moles of an oxirane functional material, such a ethylene oxide (d), which results in formation of a hydroxy functional intermediate (e). Hydroxy funciional intermediate (e) is reacted with 2 moles of a (meth)acry!ate (f) with the concurrent removal of 2 moles of alcohol (g), which results in formation of a first (rneth)acrylate functional monomer (h), which can be used in the po!ymerizabfe compositions of the present invention.

[O60J With further reference to Scheme-(A), the formation of thiol functional adduct (c) can be accompanied by the concurrent formation of coproducts, such as oligomeric coproducts. The formation of oligomeric coproducts can be minimized by adjusting the relative molar amounts of the aldehyde / ketone (a) and dithioi (b). For purposes of non- limiting illustration, a molar ratio of dithioi (b) to aldehyde / ketone (a) of at least 4 to 1 typically results in minimal formation of oligomeric coproduct.

[081] With additional reference to Scheme-(A), the {meth)ac.ry1ate (f) can be replaced with a (meth)acryioyl halide, such as {meth)acryioy! chloride, in which case 2 moles of hydrogen halide, such as hydrogen chloride, would be generated, rather than 2 moles of alcohol (g). The first {meth)acry!ate monomer (h) wouid be separated from the hydrogen halide in accordance with art-recognized work-up procedures,

[082] With further additional reference to Scheme-(A), the aldehyde or ketone (a) can be replaced with an acetai or a keta! (a-1 ) represented by the following Formula (a-1 ).

Formula (a-1 }

With reference to Formula (a-1 ), R ⁶ and R ^? are each as described previously herein, and R ^a and R are each independently selected from linear or branched optionally substituted C _r C25 alkyi, optionally substituted C ₃ -Ci2-cycloalkyi, and optionally substituted aryl. The aldehyde or ketone (a) of Scheme-(A) can, with some embodiments, be replaced with an equtmolar amount of acetai / ketal represented by Formula (a-1 ). For purposes of non- limiting illustration, with some embodiments, the acetai / ketal represented by Formula (a-1 ) Is acetone dimethyiketai.

[063] With further reference to Formula (I) and in accordance with some embodiments, n Is 2, and L ¹ is a divalent linking group represented by Formula (G-1 ) as described in further detail below. The divalent linking group L. ⁸ of Formula (G-1 ) is, with some embodiments, a residue of a hydrocarbyl group having two non-conjugated carbon-carbon double bonds. With some embodiments, L ⁸ of Formula (G-1 ) is a residue of vinyi-cyclohexene, and L ⁸ is represented by Formula (G-2) as described in further detail below, and L ¹ of Formula (I) is represented by Formula (G~3) as described in further detail below. [064] The poiymerizabie compositions of the present invention can, in addition to the first (meth)acrylate functional monomer represented by Formula (I), further include at least one ihio(meth)acrylate functional monomer represented by the following Formula (II),

[085] With reference to Formula (II), and as discussed previously herein, L is a multivalent optionally substituted hydrocarbyi group optionally interrupted with at least one of ~C(Q)-, -S- -O- and combinations thereof. Each R ^a group of Formula (il) s independently selected for each t from hydrogen and methyl, and t is from 2 to 6.

[066] The groups from which L ³ of the thio{meth)acryiate functional monomer represented by Formula (II) can be selected include, but are not limited to, those groups described previously herein with regard to L of Formula ({). With some embodiments of the present invention, the multivalent L ³ group of Formula (II) is selected from multivalent linear or branched optionally substituted C ₁ -C25 aikyl, multivalent optionally substituted C ₃ -C ₁₂ cycloalkyi, multivalent optionally substituted aryl, and combinations thereof optionally interrupted with at least one of -C(O)-, -S-, -O- and combinations thereof,

[067] With some embodiments, t is 2, and L ³ of Formula (Π) is represented by Formula (8), as described previously herein, and the thio(meth)acryjate monomer can be represented by the following Formula (lla).

Formula (Ha)

[068] With reference to Formula (lla), R ² , R ^J , R ⁸ and p are each independently as described previously herein.

|069] With some embodiments of the present invention, and with furthe reference to Formula (lla), p is 1 , and R ² and R ³ are each divalent ethyl, such as ethan-1 ,2-dtyi, in which case the thio(meth)acryiate functional monomer represented by Formula (lla) can be represented by the following Formula (lib). Formula (lib)

[070] With reference to Formula (lib), each R ^fi is independently selected from hydrogen and methyl, as described previously herein.

[071 J Thio(meth)acrylate monomers represented by Formula (H) can be prepared by art- recognized methods. For purposes of non-limiting illustration, a polythiol, such as such as dimercaptodiethy!su!fide, or a salt of a polythiol, such as such as dimercapiodiethylsulfide disodium salt, can be reacted with a (meth)acryioyi halide, such as (meth)acryioyl chloride, which results in the formation of a thio(meth)acryiate functional monomer represented by Formula (If), or, for example, Formula {i!a),

[072] With further reference to Formula (II) and with some embodiments, t is 2, and L ³ is represented by the following Formula (G-1 ),

Formula (G-1 )

With reference to Formula (G-1 ), R ² , R ³ and ρ are in each case as independently described previously herein with regard to Formula (B), With further reference to Formula (G-1 ), L ⁸ is a divalent optionally substituted hydrocarbyi. With some embodiments, L ⁸ is selected from divalent linear or branched optionally substituted Ci-G ₂₅ aikyi, divalent optionally substituted C3-C ₁₂ cycioaikyi, divalent optionally substituted aryi, and combinations thereof.

[073] The divalent group L ⁸ of Formula (G~1 ) with some embodiments is a residue of an optionally substituted hydrocarbyi having two non-conjugated carbon-carbon double bonds, such as a linear or branched optionally substituted C C ₂ s aikyi having two non-conjugate double bonds, and/or optionally substituted 0 ₃ -0 _¾ cycioaikyi having two non-conjugated double bonds. With some embodiments, L ⁸ of Formula (G-1 ) is a residue of vinyi- cyclohexene, such as 4-vinyl-1~cyc!obexene or 3-vinyi~1 ~cyciohexene. in accordance with some non-limiting embodiments, L ⁸ of Formula (G-1 ) is a residue of vinyl-cyclohexene, and is represented by the Following (G-2), Formula (G-2)

[074J In accordance with some embodiments, and with reference to Formula (SI), t is 2, and L ³ is represented by Formula (G-1 ), in which L ⁸ is a residue of vinyl-cyciohexene and is represented by Formula (G-2), in which case L ³ is more particularly represented by the following Formula (G-3).

[075] With reference to Formula (G-3), and in accordance with some embodiments, the two groups bonded to the cyclohexane ring are ortho, meta or para relative to each other, and are not bonded to the same carbon of the cyclohexane ring. With further reference to Formula (G-3), R ² R ³ and p independently in each case are described previously herein with regard to Formula (B).

[0781 Further, when t is 2 and L ³ is represented by Formula (G-3) in which the two groups bonded to the cyclohexane ring are para relative to each other, the tbio(meth)acryjaie monomer represented by Formula (I!) can be more particularly represented by the following Formula (lie).

Formula (lie)

[077J In accordance with some embodiments, when t is 2 and L ³ is represented by Formula (G-3) in which the two groups bonded to the cyclohexane ring are msta relative to each other, the thio(meth)acry1ate monomer represented by Formula (II) can be more particularly represented by the following Formula (lid). Formula (lid)

[078] With reference to Formulas (lie) and (Ifd), each R ¹ Is independently selected from hydrogen and methyl, and R ² , R ³ and p are each independently as described previously herein with regard to Formula (8).

[079] With additional reference to Formulas (He) and (!ld), and with some embodiments, R ² and R ³ are each ethan-1 ,2-diy!, and each p is 1 , in which case the thio(meth)acrylate monomers represented by Formulas (He) and (lid) can be represented by the following

Formulas (He) and (tif), respectively,

Formula He)

080J Thio{meth)acry1ate functional monomers similar to those represented by Formulas (lie) and (Hd) can be prepared by art-recognized methods. For purposes of non-limiting sliusiration, 2 moles of a dithtoi, such as dimercaptodiethyisulfide, are reacted with one mole of vinyl-cyclohexene, such as 4-vinyl-l -cyclohexene, under art-recognized thiol-ene reaction conditions, which results in a thiol-functiona! intermediate, The thiof-functionai intermediate's) is/are then reacted with 2 moles of a (meth)acryloyl halide, such as (meth)acryloyl chloride, resulting in formation of a thio(meth)acryiate functional monomer represented by Formula (lie), or Formula (Hf), or mixtures thereof.

|081] For purposes of non-limiting illustration, thiol-ene reactions generally involve the reaction of a material having one or more thiol groups, such as a dithiol, with a material having one or more carbon-carbon double bonds, such as a vinyl compound, a (meth)acry!ate, and/or an ailyl compound. With some embodiments, a material having one or more carbon-carbon triple bonds is used, as described in further detail herein with regard to the synthesis of monomers represented by Formula (IV). For free radical initiated thiol- ene reactions, reaction between the material having one or more thiol groups and the material having one or carbon-carbon double bonds is typically carried out in the presence of a free radical initiator, such as peroxide type and/or azo type free radical initiators. Examples of peroxide free radical initiators include, but are not limited to: peroxymonocarbonate esters, such as tertiarybuty!peroxy 2-eihylhexyi carbonate and teriiarybutyiperoxy isopropyi carbonate; peroxyketals, such as 1 ,1-di-(t-butyi peroxy)-3,3 _; 5- trimethylcyciohexane; peroxydscarbonafe esters, such as di(2-ethylhexyl) peroxydicarbonate, df{secondary butyl) peroxydicarbonate and diisopropylperoxydicarbonate; diacyperoxides, such as 2,4-dlchiorobenzoyi peroxide, isobutyryl peroxide, decanoyi peroxide, iauroyi peroxide, propionyl peroxide, acetyl peroxide, benzoyl peroxide, p-ch!orobenzoyi peroxide; peroxyesters such as t-butylperoxy pivalate, t-butyiperoxy octyiate, and t- butyiperoxyisobuh raie; methylethy!ketone peroxide, and acetylcyciohexane suifonyf peroxide. Examples of suitable azo type radical initiators include, but are not limited to, azobis(organonitrile) compounds, such as a2obis(isobutyronifriie) and azobis(2,4- dimeihylvaieronitrile), Additional non-limiting examples of azo type radical initiators are described in further detail herein with regard to the synthesis of monomers represented by Formula (IV). The free radical initiator is typicaiiy present in an amount at least sufficient to initiate reaction between the thiol compound and the compound containing one or more carbon-carbon double bonds. With some embodiments, the free radical initiator is present in an amount of from 0.01 percent by weight to 5 percent by weight, based on weight of reactants. The thioi-ene reaction can be conducted under any suitable temperature, such as from room temperature (e.g., about 25°C) to 100°C. The reaction temperature typically depends at least in part on the temperature or temperature range under which the free radical initiator is thermally activated,

[082] When the reactants are multifunctional, such as a polythloi having two or more thiol groups and a material having two or more carbon-carbon double bonds, the thiol-ene reaction can result in the formation of some oligomeric species. With some embodiments, the formation of oligomeric species can be minimized by adjusting the molar ratio of the reactants. For purposes of non-limiting illustration, with the reaction between a d (thiol and a material having two carbon-carbon double bonds (that are reactive with thiol groups), the dithio! can be present in a molar excess relative to the material having two carbon-carbon double bonds, such as a molar ratio of greater than or equal to 2 : 1 , or greater than or equal to 3 : 1 , or greater than or equal to 4 : 1. [0831 It should be understood that for purposes of the present invention, "base catalyzed thiol-ene reaction" conditions are the preferred conditions of thiol-ene reaction of a thiol compound with a material having (metb)acrylate group(s). Base catalysts that can be used for these purposes include base catalysts known to those skilled in the art; tertiary amines, including but not limited to triethylamine, 1 ,8-diazabicyc!o[5.4.0jundec-7-ene, 1 ,5- diazabicyclo[4.3.0]non-5-ene, and 1 ,4-diazabicyclo[2.2.2joctane; and tertiary phosphines, including but not limited to trioctylphosphine, tributylphosphine, triphenylphosphine, methyldiphenylphosphine, and dimethylphenyiphosphine.

[084] The polymerizable compositions according to some embodiments of the present invention can optionally include, in addition to the first (meth)acryiate functional monomer represented by Formula (I), at Ieast one second (meth)acryiate functional monomer represented by the following Formula (ill).

Formula (111)

[085] With reference to Formula (111) and as described previously herein, L ⁴ is a multivalent optionally substituted hydrocarbyl group optionally interrupted with at least one of -C(O)-, -S-, ~0~ and combinations thereof, With further reference to Formula (III), L ⁵ Is independently for each υ a divalent optionally substituted hydrocarbyl group. The R ⁹ and R ¹⁰ groups of Formula (III) are each independently selected for each u from hydrogen and methyl, and u is from 2 to 8.

[086] The multivalent linking group L ⁴ of Formula (Hi) can be selected from those classes and examples of multivalent linking groups described previously herein with reference to L ¹ of Formula (I). The divalent linking groups L ⁵ of Formula (Hi) can be selected from those classes and examples of divalent linking groups described previously herein with reference to L ² of Formula (I).

[087] The multivaient linking group L ⁴ of Formula (ill) can, with some embodiments, be selected from multivalent linear or branched optionally substituted C _r C ₂ 5 alkyl, multivalent optionally substituted C3-C12 cycloalkyl, multivalent optionally substituted aryl, and combinations thereof optionally interrupted with at least one of -C(O)-, -S-, -O- and combinations thereof. With some embodiments, u of Formula (ill) is 2, and the multivalent linking group L ⁴ is a divalent linking group, which can be represented by Formula (8), as described previously herein with regard to Formula (I).

[088] The divalent linking groups L ^a of Formula (III), with some embodiments, can each be independently selected for each u from: divalent linea or branched optionally substituted C ₁ -C25 aikyi, or divalent linear or branched optionally substituted C ₁ -C ₁ 0 a!ky!, or divalent linear or branched optionaily substituted C _r C alkyl, or divalent optionally substituted d-Cz aikyi; divalent optionally substituted C ₃ -C ₁₂ cycloaiky!, such as such as divalent optionally substituted C ₃ -C ₈ cyclic a!ky!; divalent optionally substituted aryf, such as divalent phenyl, including linear or branched Ci-C ₃ alkyl substituted divalent phenyl; and combinations thereof, The divalent linking group L ⁵ of Formula (il!) can, with some embodiments, be represented by Formula (C), as described previously herein with regard to Formula (I).

[089J The second (meth)acryiate functional monomer represented by Formula (III) can be prepared by art-recognized methods, For purposes of non-limiting Illustration, when u is 2, a polythioi, such as drmercaptodiethyisu!fide, is reacted with a bis-(meth)acrylate., such as aikyleneglycol bis(meth)acry!ate including, but not limited to, ethyienegiycol bis(meth)acrylate, or, polyalkyieneg!yco! bis(meth)acryiate including, but not limited to, diethy!enegiycol bis(meth)acry!ate, under base catalyzed thio!-ene reaction conditions, which results in formation of a second (meth)acrylaie funciional monomer represented by Formula (Hi). Synthesis of the second (meth)acryiate functional monomer represented by Formula (ill) can result in the formation of coproducts, such as oligomeric coproducts, which can optionally be present in the poiymerizable compositions of the present invention.

[090] accordance with some embodiments, and with reference to Formula (HI), u is 2, and L ⁴ is represented by Formula (G-1 ) and more particularly by Formula (G-3), as described previously herein. When u is 2 and L ⁴ is represented by Formula (G-1 ) or more particularly by Formula (G-3), L ⁵ of Formula (III) is, with some embodiments represented by Formula (C), as described previously herein with regard to Formula (I). Such a Formula (Hi) type (meth)acr lafe monomer can be prepared by art-recognized methods. For purposes of non-limiting illustration, 2 moles of a dithiol, such as dirrsercaptodiethylsulfide, are reacted with one mole of vinyf-cyclohexene, such as 4-vinyi-1 -cyciohexer>e or 3-vinyi~1~cyclobexene, under free radical thlof-ene reaction conditions, which results in a thsoi-funclionai intermediate. The thioi-functionai intermediate is then reacted with a bss(meth)acryia!.e, such as aikyleneglycol bis(meth)acryiate or poiyatkylenegiyco) bis(meth)acryfate, under base catalyzed thiol-ene reaction conditions, which results in formation of a second (meth)acry!ate functional monomer represented by Formula (III), in which L ⁴ is represented by Formula (G- 1 ) or more particularly by Formula (G-3), and L. ^s is represented by Formula (C), [091 The polymerlzable compositions of the present invention include, with some embodiments, a (meth)acryiate monomer represented by Formula (I) and at least one of a thio(meth)acrylate monomer represented by Formula (II) and/or a (meth)acrylate monomer represented by Formula (SSI). When composed of a (meth)acrylate monomer represented by Formula (!) and at least one further monomer represented by Formulas (II) and/or (III), the (meth)acryiate monomer represented by Formula (!) is present, with some embodiments, in an amount of from 1 to 99 percent by weight, or from 20 to 90 percent by weight, or from 40 to 80 percent by weight, and the further monomer represented by Formula (II) and/or Formula (ill) is present in a combined amount of from 1 to 99 percent by weight, or from 10 to 75 percent by weight, or from 20 to 60 percent by weight, the percent weights in each case being based on total weight of the recited monomers.

[092] in accordance with some embodiments, and as described previously herein, the polymerlzable compositions include at least one thio(meth)acryiate functional monomer represented by Formula (if) and at least one meth(acrylafe) functional monomer represented by Formula (HI). The monomers represented by Formulas (II) and (!!!) are each Independently as described previously herein. With some embodiments, the po!ymerizable composition comprising monomers represented by Formulas (I!) and (HI), is free of (meth)acry!ate functional monomers represented by Formula (}). The relative amounts of monomers represented by Formulas (IS) and Formula (Hi ^' ) can vary widely. In accordance with some embodiments, the thio(me†h)acrylate functional monomer(s) represented by Formula (H) are present in an amount of from 20 to 99 percent by weight, or from 35 to 90 percent by weight, or from 50 to 80 percent by weight, and the (meth)acryiate functional monomer(s) represented by Formula (III) is present in an amount of from 1 to 80 percent by weight, or from 10 to 65 percent by weight, or from 20 to 50 percent by weight, the percent weights in each case being based on the total weight of the recited monomers. As previously mentioned, any of the polymerlzable compositions of the present invention described immediately above also may further comprise a polymerization moderator as described herein below.

[093] The polymerlzable compositions of the present invention can include, with some embodiments, at least one diethylenical!y unsaturated monomer chosen from, 1 ,2- divinylbenzene, 1 ,3-diviny!benzene, 1 ,4-divinyibenzene, bisphenoi A ethoxylafe diaerylate (CAS # 64401 -02-1 ), bisphenoi A ethoxyiate dimethacrylate (CAS # 41637-38-1 ), bisphenoi A propoxylate diaerylate (CAS # 67952-50-5), bisphenoi A propoxylate dimethacrylate, Bisphenoi A giycero!afe diaerylate (CAS # 4887-94-9), bisphenoi A glycerolate dimethacrylate (CAS # 1565-94-2), bisphenoi F ethoxyiate diaerylate (CAS # 120750-67-6), bisphenoi F ethoxylate dimethacryiate, bisphenoi F propoxylate dlacryiate, bisphenoi F propoxylate dimethacryiate, bisphenoi S ethoxylate diacry!ate, bisphenoi S ethoxylate dimethacryiate, bisphenoi S propoxylate diacrylate, bisphenoi S propoxylate dimethacryiate, polyethylene glycol di(meth)acry!ate, polypropylene glycol di(meth)acryiaie, (meth)acrylic anhydride, or mixtures thereof. The concentrations of the aforementioned co-monomers, individually or in cornbinaiion, range from 0.5% to 60%, based upon the total monomer weight of the polymerizabie composition. The effect of the material on refractive index and other properties of the finished polymer is taken into consideration regarding the amount- used individually or in combination.

[094J Further, the polymerizabie compositions of the present invention also can include at least one polyethylenicai!y unsaturated monomer chosen from trimethySolpropane tri(meth)acry!ate, trimethyiolethane tii(meth)acrylate, ditrimethyiolpropane

tetra(meth)acfyEate, pentaerythrito! tri(meth)acrylate, pentaerythritol tetra(meth)acry{ate, dipentaerythritoi penta(meth)acrylate, di(pentaerythritol hexa{meth)acryiaie, tris(2- hydroxyethyl) tri(meth)acry!ate ₍ 2,4,6-triallyloxy-1 ,3,5-triazine (CAS # 101-37-1), 1 ,3,5 ria!lyl- 1 ,3,5-tria2ine-2,4 ₍ 6(1 H, 3H, 5H)-trione (CAS # 1025-15-6), or mixtures thereof. The concentrations of the aforementioned eo-monomers, individually or in combination, range from 0.1 % to 20%, based upon the total monomer weight of the polymerizabie composition. The effect of the material on refractive index a d other properties of the finished polymer is taken into consideration regarding the amount used individually or in combination.

J095J With some embodiments, the polymerizabie compositions of the presenl invention include at least one (meth)acryiate functional monomer represented by Formula (IV), as described previously herein. The multivalent L ⁶ and divalent L ⁷ groups of Formula (IV) can be selected from those groups as described previously herein with regard to L ¹ and L ² of Formula (I), respectively. With some embodiments of the present invention, the multivalent L ⁶ group of Formula (IV) is selected from multivalent linear or branched optionally substituted Ci-C ₂₅ alkyl, multivalent optionally substituted C ₃ -C ₂ cycioafkyl, multivalent optionally substituted aryl, and combinations thereof optionally interrupted with at least one of ~C(0)-, - S-, -O- and combinations thereof. In accordance with additional embodiments, the divalent L ⁷ group of Formula (fV) is independently for each v selected from divalent linear or branched optionally substituted C1-C25 alkyl, divalent optionally substituted C ₃ -C ₁₂ cycloatkyl, divalent optionally substituted aryl, and combinations thereof optionally interrupted with at least one of -O- and -S-.

[098] With further reference to Formula (iV), with some embodiments of the present invention, the divalent R ¹² group can be selected, independently for each w, from those groups as described previously herein with regard to R ⁴ of Formula (C). With some embodiments, each R ² , of Formula (IV), for each w is independently selected from divalent linear or branched optionally substituted C _r C _!0 alkyl, and divalent optionally substituted C.. _: - Ci2 cycioalkyl.

[097] With further reference to Formula (IV) and in accordance with some embodiments, v is 2, and L ⁶ is a trivaient residue of a hydroxy! functional compound having a single carbon- carbon triple bond. Examples of hydroxy! functionai compounds having a single carbon- carbon triple bond from which the (meth)acry!ate functional monomer represented by Formula (IV) can be prepared include, but are not limited to, propargyl aicohoi, 2-butyne-1 ,4- diol, 3-butyne-2-oS, 3-hexyne-2,5-dio!, and mixtures of two or more thereof. A portion of the hydroxy! functionai groups on the hydroxyl functional compound having a single carbon- carbon triple bond may be esierified. For example, a portion of the hydroxy! functional compound having a single carbon-carbon triple bond may include an a!kyne-functionai ester of a C C-12 carboxylic acid such as propargyl acetate, propargyl propionate, propargyl benzoate. and the like.

[098] When v is 2 and L ⁶ is a trivaient residue of a hydroxy! functional compound having a single carbon-carbon triple bond, the (rneth)acrylate monomer represented b Formula (IV) can be prepared In accordance with the following general description with propargyl alcohol as the hydroxyl functional compound having a single carbon-carbon triple bond. Typically, a thiol functional Intermediate is first formed by reacting 1 mole of propargyl alcohol with about two mo!es of a dithioi, such as dimercaptodiethylsuifide, under art-recognized free radical thloi-ene reaction conditions. The dithioi groups can each form a covaient bond with one carbon of the C-C triple bond group, or with both carbons of the C-C triple bond group. While not intending to be bound by any theory, it Is believed that one dithioi group forms a cova!ent bond with each separate carbon of the C-C triple bond. The resulting thiol functionai intermediate is reacted with at least 2 moles, such as 2 to 3 moles of an oxirane functional material, such as ethylene oxide, or a cyclic ether, which results in the formation of a hydroxy! functional intermediate. Alternatively, said thiol functional intermediate can be reacted with at least 2 moies, such as 2 to 3 moles, of a 2-halo-1 -hydroxyt-a!kane, such as 2-chiorethanol, in accordance with art-reconginzed method, thus forming a hydroxyl functionai intermediate. Likewise, the thiol functional intermediate can be reacted with at least 2 moles, such as 2 to 3 moles, of a 1 ,2-alky!ene carbonate, such as ethylene carbonate, In accordance with art-recognized methods, this forming a hydroxy! functional intermediate. The hydroxyl functional intermediate is then reacted with at least 2 moles, such as 2 to 6 moles of a (meth)acrylaie with concurrent removal of alcohol, so as to result In formation of the (meth)acryfate functional monomer represented by Formula (IV). Alternatively, the hydroxy! functional intermediate can be reacted with at least 2 moles, such as 2 to 3 moles of a (meih)acryioyi halide, such as (meth)acryioyi chloride, which results in formation of the (metb)aerylaie functional monomer represented by Formula (IV), after art- recognized work-up procedures to separate the desired product from the resulting hydrogen halide. Formation of the thiol functional intermediate can resuit in the concurrent formation of oligomeric species, which can optionally be present in combination with the (meth ^' )acrylate functional monomer represented by Formula (IV).

[099] During formation of some (mefh)acrylafe functional monomers represented by Formula (IV), formation of the thiol functional intermediate as described previously herein, can be carried out in the presence of a free-radical initiator. The free-radical initiator can be selected from art- recognized compounds. Non-limiting examples of free-radical initiators include, but are not limited to, azo or peroxide type free-radical initiators, such as azobisafkaienenitriles. The free-radical initiator can be selected from azobisa!kafenenitriles, which are commercially available from DuPont under the tradename VAZO. Examples of VAZO initiators that can be used, include, but are not limited to, VA20-52, VA20-64, VAZO- 67, VAZO-88 initiators, and mixtures thereof. Preparation of the thiol functional Intermediate is described in further detail in United States Patent No. 7,888,436 B2 at column 8, lines 3- 53, which disclosure is incorporated herein by reference,

[0100] With some embodiments of the present invention, poiymerizable compositions that include at least one (meth)acrylate functional monomer represented by Formula (IV), can further Include at least one monomer selected from monomers represented by Formula (I), Formula (if), Formula (III), and combinations of two or more thereof. When the poiymerizable composition Is, with some embodiments, composed of a (meih)acry!ate monomer represented by Formula (IV) and at least one further monomer represented by Formulas (I), (II) and/or (Hi), the (meth)acryiate monomer represented by Formula (IV) Is present in an amount of from 1 to 99 percent by weight, or from 25 to 95 percent by weight, or from 50 to 90 percent by weight, and the further monomer represented by Formulas (I), (II) and/or (HI) is present in a combined amount of from 1 to 99 percent by weight, or from 5 to 75 percent by weight, or from 10 to 50 percent by weight, the percent weights in each case being based on the total weight of the recited monomers.

[01011 in accordance with some non-limiting embodiments, the poiymerizable compositions of the present invention include a (meth)aeryiate monomer represented by Formula (IV) and a (mefh)acrylate monomer represented by Formula (I), in which L ¹ of the (meth)acrylate monomer represented by Formula (1) is free of substitution with a group represented by the foSfowing Formula (M):

Formula ( )

With reference to Formula ( ), Z, R ² and w are each as described previously herein with regard to Formula (IV).

[01021 ^ ^{n a} particular embodiment, the present invention is directed to a poiymerizabie composition comprising:

(a) at feast one fhlo{meth)acrylate functional monomer represented by the following Formula (lig),

wherein,

L ⁸ is a divalent linking group selected from,

(i) a divalent linking group represented by the following Formula (D),

(D)

-C(R ⁶ )( R ⁷ }- wherein R ⁶ and R ^r each independently are selected from hydrogen, linear or branched optionally substituted CrC ₁₀ aiky!, optionally substituted C^-C^ cyc!oa!kyl, and optionally substituted aryi, or R ^b and R ⁷ together form a C ₄ -C ₂ optionally substituted cycioalkyl, and

(ii) a divalent linking group represented by the following Formula (A),;;

(A)

wherein Y is O or S, and

R ² for each p is independently selected from divalent linear or branched optionally substituted C C- _i0 aikyi, and/or divalent optionally substituted C ₃ ~Cia cycioalkyl, each R ³ independently is selected from divalent linear or branched optionally substituted C ₁ -C ₁₀ alky!, and/or divalent optionally substituted C3-C ₁₂ cyctoa!kyi, each p is from 0 to 10, each R ^d is independently selected from hydrogen and methyl; and

(b) optionally a polymerization moderator,

[0103] The monomers of the compositions of the present invention, such as the monomers represented by Formula (I), ({!), (Ill) and (IV), can be prepared, as described previously herein, from pofythiois having two or more thiol groups. Examples of poiythio!s that can be used to prepare the monomers of the poiymerizabie compositions of the present invention, such as, but are not limited to, monomers represented by Formula (I), Formula (ii), Formula (SSI), Formula (IV) and related monomers, include, but are not limited to, 1 ,2- ethanedithioi, 2,2' hiodiethanethioi, 2,5-dimercapiomeihyl- 1 ,4-dithSane, 1,2-bis-(2- mercaptoethy!thfo)-3-mercaptopropane, pentaerythritoi tetrakis(3-mercapiopropionate), pentaeryihritoi tetrakis(2-mercaptoacetate) _t ietrakis{7-nrterca _. pto-2,5-dithiaheptyl)methane, irimethyloipropane tris{3-mercaptopropionaie), trimethyloipropane tris{2-mercaptoacetate). 4-mercaptomethyl-3,6-dithia-1 ,8-octanedithioi, 4-tert-butyi~1 ,2-benzenedithioi, 4,4'~ thiodibenzenethiol, benzenediihiol, ethylene glycol di(2-mercaptoacetate}, ethylene glycol di(3~mercaptopropionate), poly(ethyiene glycol) di(2-mercapioacetate), poly(ethylene glycol) di(3-mercaptopropionate), a polythiof monomer represented by the following Formula (K),

Formula (K)

SH

I

i

O CH ₂ O

HS R ¹ — C O CH— CH ₂ ~~ G C f¾ ¹² — SH

[0104] With reference to Formula (K), R' ¹ and R ¹² are each independently as described previously herein with reference to Formula L ¹ (a), A pofythiol represented by Formula (K) can be prepared by an art-recognized esierificaiion o Iransesterification reaction between, for example, 3-mercapto-1 ,2-propanediol {Chemical Abstract Service (CAS) Registry No. 96- 27-5) and a thiol functional carboxylic acid or thiol functional carboxylic acid ester in the presence of a strong acid catalyst, such as methane sulfonic acid, with the concurrent removal of water or alcohol from the reaction mixture. The polythiof represented by Formula ( ) optionally further includes coproducts, such as oligomers which can optionally include disulfide (-S-S-) linkages, resulting from its synthesis. 0105] A non-limiting example of another dithio! that can be used to prepare the monomers of the compositions of the present invention is represented by the following Formula (N-1 ).

Formula (N-1 )

With reference to Formula (N-1 ) R ^z , R ³ and p are each independently as described previously herein with regard to Formula (B), With further reference to Formula (N-1 ), L ⁸ is as described previously herein with regard to Formulas (G-1 ), (G-2) and (G-3).

[0108J With some embodiments, and as described previously herein with regard to Formula (G-1 ), (G-2) and (G-3), L ⁸ is a residue of a optionally substituted hydrocarbyl having two non-conjugated carbon-carbon double bonds, such as vinyl-cydohexene. The monomers of the poSymerizabie compositions of the present invention can, with some embodiments, be prepared using a dithioi represented by the following Formula (N-2),

Formula (N-2)

With reference to Formula {N-1 ), R ² , R ³ and p are each independently as described previously herein with reference to Formula (B), With some embodiments, the two groups bonded to the cydohexane ring of Formula (N-2) are ortho, meta or para relative to each other, and are not bonded to the same carbon of the cydohexane ring,

[0107] In some particular embodiments of the present invention, L ² of Formula (I); L ⁷ of Formula (IV); R ³ of Formula (Id); R ⁴ /R ⁵ of Formula ( a); and L ² of Formula (lc) are each a divalent hydrocarbyl group containing one carbon atom, such as -CH ₂ -, --CH(R)--, or ~C(R'}( R ² )- where each of R, R ¹ and R ² independently represents an optionally substituted hydrocarbyl group. For example, such a monomer, where L ² of Formula (I) is -CH ₂ -, can be synthesized by reacting 1 molar equivalent of mercaptan with 1 molar equivalent of formaldehyde (such as paraformaldehyde) resulting in an intermediate containing terminal hemithioacetal groups. This OH-ierminated molecule then can be (meth)acryiated, either by reaction with (meth)acry!oyi chloride or (meth)acrylic anhydride; direct esferificatson with (meth)acryiic acid; or by transesterification with an alkyl (meth)acryiate (such as methyl (meth)acrylate). Alternatively, the mercaptan can be reacted with a substituted aldehyde (HC(~0)R) instead of formaldehyde. For example, when mercaptan is reacted with benzaidehyde , L ² would represent -CH(R)-, where R is phenyl.

[0108] In a further embodiment of the present invention, each of L ² of Formula (I); L ⁷ of Formula (IV) and R ³ of Formula (Id) can be a divalent optionally substituted hydrocarbyl group, where the optional substitution is an aryl group, such as a phenyl group. For example, L ^? of Formula (!) can be -CH ₂ CH(R)- or -CH(R)-CH ₂ -, where R represents a phenyl group. This reaction product can result from the reaction of 1 molar equivalent of mercaptan with 1 molar equivalent of styrene oxide (through ring opening of the epoxide ring), to form a poly-hydroxy terminated .sulfur-containing materia! with aromatic rings, followed by formation of {meth)acrylate end groups through the reaction of the terminal OH groups with either (meth)acry!oy! chloride or (n eth)acryiic anhydride, direct esterification with (meth)acryiic acid, or by transesterification with an alkyl (meth)acryiate.

[0109] Any of the po!ymerlzable compositions of the present invention optionally can include, one or more monomers having a single elhylenically unsaturated radically poiymerizable group. Examples of monomers having a single ethylenicafly unsaturated radically poiymerizable group that can optionally be present in the poiymerizable compositions of the present invention include, but are not limited to: acrylic acid; mefhacry!ic acid; esters of acrylic acid such as methyl or ethyl acrylate and 2-hydroxyethyl acrylate; esters of methacrylic acid, such as methyl or ethyl methacrylate, phenoxyethyl methacrylate, isoborny! methacrylate, cyciohexyl methacrylate and 2-hydroxyeihy! methacrylate; ally! esters, e.g., ally! benzoate; ally! carbonates, e.g., phenyl ally! carbonate; vinyl esters such as vinyl acetate; styrene; and vinyl chloride; ethyienically unsaturated carboxylic acid anhydrides, e.g., ma.leic anhydride, citraconic anhydride, and itaconic anhydride. More specifically, for example, the monoethyienicafly unsaturated monomers can include, methyl methacrylate, methacrylic acid, maleic anhydride, phenoxyethyl methacrylate, styrene and mixtures thereof. The monoethylenically unsaturated rnonomer(s), when used, is typically present in an amount of from 0.1 percent by weight to 60 percent by weight, based on the total monomer weight of the poiymerizable composition, such as from 1 percent by weight to 55 percent by weight, or from 3 to 45 percent by weight, based on the total monomer weight of the poiymerizable composition. The effect of the material on refractive index and other properties of the finished polymer is taken into consideration regarding the amount used individually or In combination,

[0110] The poiymerizable compositions of the present invention further can include, with some embodiments, a polymerization moderator, The presence of polymerization moderator can minimize the formation of any distortions or defects, e.g., sfriatlons and or cracks/fissures, in poiymerizates that may be obtained from the polymerizable compositions of the present invention. Exampies of polymerization moderators that can be included in the polymerizable compositions of the present invention, include but are not limited to, dilauryl thiodipropionate, 1 -isopropyi~4-methyl-1 ,4-cyclohexadiene (y-terpinene); 1-isopropy!~4- methyl-1 ,3-cyclohexadiene (a-terpinene); 1-methyl-4-(propan-2-ylidene)cyciohex-1-ene (terpsnoiene); and alpha-methyl styrene dimer, 1 ,1 -diphenyiethy!ene, cis-1 ,2- diphenylethylene, 3,7,7 rimethylbicyclo[4.1.0]hept-3~ene (3-carene), 4-isopropeny!-1- methyicyclohexene (dipentene), (S )-(-)-4-isoproperiyl-1 -methy!cyclohexene {(S)-lsmonene), 2,6-dimethyl-2 _! 4,6-octairiene, 4-iert-butyipyrocatechol, iriphenyimethane, and mixtures of two or more thereof.

[0111] With some embodiments, the polymerization moderator is selected from 1- isopropyi-4-methy!-1 ,4-cyclohexadiene; 1-isopropyi-4-methyl-1 ,3-cydohexadiene; 1-methyi- 4-(propan-2-ylidene)cyc!ohex-1 -ene; 2,6~dimeihyi-2,4,6-octatriene, and alpha-methyl styrene dimer..

[0112] As used herein, the term "alpha-methyl styrene dimer" means a polymerization moderator ithat includes 2,4-dipheny!-4-methyi-1-pentene, and optionally at least one of 2,4- diphenyi-4- ^' methy!-2-pentene and/or 2-phenyi- 1 -propene (which is also referred to as, alpha- methyl styrene). With some embodiments, the afpha-methyi styrene dimer polymerization moderator Includes 90 to 93 percent by weight of 2,4-diphenyi~4-methyl-1 -pentene, 6 to 8 percent by weight of 2,4-diphenyl-4-methyi-2-pentene, and 0.25 to 0.75 percent by weight of 2-pheny!-1 -propene, the percent weights in each case being based on total weight of alpha- methyl styrene dimmer.

[0113} The polymerization moderator can be present in the polymerizable compositions of the present invention in a wide range of amounts. In some embodiments, the polymerization moderator is present in the po!ymerizable compositions of the present invention, in an amount from 0,01 percent to 15 percent by weight, or from 0.1 percent to 8 percent by weight, or from 0.3 percent to 5 percent by weight, based on the total weight of monomers and polymerization moderator.

[0114] The polymerizable compositions of the present invention can further include, with some embodiments, an initiator that is capable of initiating free radical polymerization of and amongst the ethy!enicaily unsaturated groups of the monomers thereof. With some embodiments, the polymerizable compositions of the present Invention include a free radical Initiator that ss thermally activated. By "thermally activated" means the free radical initiator becomes active at elevated temperature, such as at temperatures greater than ambient, room temperature, such as greater than 25 G, as wil! be described in further detail herein.

[0115] The thermally activated free radical initiator can, with some embodiments, be selected from organic peroxy compounds, azobis(organonitrile) compounds, N-acyioxyamine compounds, O-imino-isourea compounds, and combinations of two or more thereof,

[0118] With some embodiments, the thermally activated free radical initiator is selected from one or more organic peroxy compounds. Examples of organic peroxy compounds, that may be used as thermal polymerization initiators include, but are not limited to: peroxymonocarbonate esters, such as tertiarybutyi peroxy 2-ethylhexyi carbonate and tertiarybutylperoxy isopropyl carbonate: peroxyketais, such as 1 ,1-d (t~buty! peroxy)-3,3,5- trimethyicyc!ohexane; peroxydicarbonate esters, such as di(2-ethylhexyi) peroxydicarbonate, di(secondary butyl) peroxydicarbonate and diisopropylperoxydicarbonate; diacyperoxldes, such as 2,4-d ichlorobenzoyf peroxide, isobutyryl peroxide, decanoyl peroxide, lauryl peroxide, propionyl peroxide, acetyl peroxide, benzoyl peroxide, p-ch!orobenzoyS peroxide; peroxyesters such as t-butyiperox pivaiate, t-butylperoxy octylate, and t- butyiperoxyisobutyrate; methylethyiketone peroxide, and aeetylcyclohexane suifonyl peroxide,

f0117| With some embodiments, further examples of peroxy compounds from which the free radical initiator can be selected include, but are not limited to, 2,5-dsrnethyl-2,5-di(2- ethylhexanoyiperoxy)hexane , and/or 1 , 1 -bis(tert~butyiperoxy)-3, 3,5-trimethyScyciohexane.

[0118] Examples of azobis(organoniirile) compounds, that may be used as thermal polymerization initiators in the po!ymerizable compositions of the present invention, include, but are not limited to, azobis{isobuiyronitriie}, 2,2'-azobis(2-methy!-butanenitriie), and/or azobis(2,4-dimethylvaieronitri!e).

[0119] With some further embodiments of the present invention, the thermally activated free radical initiator is selected from 1-acetoxy~2,2,6,6-teiramethylpiperidine, and/or 1 ,3- d!cyc!ohexy!-0-(N-cyciohexylideneamtno)-isourea.

[0120] The amount of thermal poiymenzation initiator used to initiate and polymerize the polymerizable compositions of the present invention can vary, and can depend at least in part on the particular initiator or initiators used. With some embodiments, only that amount that Is required to initiate and sustain the polymerization reaction is required, which can be referred to as an Initiating amount. With some embodiments, the thermally activated free radical Initiator is present in an amount of from 0.01 to 7 parts of initiator, or from 0.1 to 3,5 parts initiator, or from 0,5 to 2.5 parts initiator, in each ease the parts initiator being per 100 parts of monomer(s) (p m) present in the poiymerizabie composition,

[0121] The thermal cure cycie used to cure the poiymerizabie compositions of the present invention, with some embodiments, involves heating the poiymerizabie composition in the presence of the initiator from room temperature up to 50°C to 150 °C, over a period of from 2 hours to 48 hours, or from 30 °C up to 90 °C or 100 °C over a period of from 12 to 24 hours, or from 65 °C up to 1 15 G or 125 °C over a period of from 12 to 24 hours.

[0122] Polymerization of the poiymerizabie compositions of the present invention results in the formation of a polymerizate, which can be in the form of a shaped article. Polymenzates obtained from polymerization of the poiymerizabie compositions of the present invention are solid, and with some embodiments, transparent. Transparent po!ymerizates prepared from the poiymerizabie compositions of the present invention, can be used in optical or ophthalmic applications.

[0123] Polymerizates prepared from the poiymerizabie compositions of the present invention, with some embodiments, have: a refractive index of at least 1.57, or at least 1.58, or at least 1.59; an ABBE number of at least 30, or at least 33, or at least 35; and a Fischer microhardness value of at least 50 HI mm ² , or at least 70 N/mm ² , or at least 9QN/mm ² , With some embodiments, poiymerizates prepared from the poiymerizabie compositions of the present invention have an initial (zero second) Barcol hardness of at least 1 , or at least 10, or at least 20. The refractive index, ABBE number, and Fischer Hardness values can be determined in accordance with art-recognized methods. With some embodiments: refractive index values (n _e ²⁰ ) and ABBE numbers are determined using a etrtcort Model 2010 Prism Coupler, Thin Film Thickness / Refractive index Measurement System, in accordance with the manufacturer's Operation and Maintenance Guide; and Fischer Hardness values are determined in accordance with ISO 14577 using a Fischer Technologies H100C Microhardness Measurement System.

[0124] Poiymerizates prepared from the poiymerizabie compositions of the present invention can be used to form solid articles such as optical element(s) or device(s). As used herein the term "optical" means pertaining to or associated with light and/or vision. For example, the optica! element or device can comprise ophthalmic elements and devices, display elements and devices, windows, mirrors, and/or active and passive liquid crystal cell elements and devices. As used herein the term "ophthalmic" means pertaining to or associated with the eye and vision. Non-limiting examples of ophthalmic elements include corrective and non-corrective lenses, including single vision or multi-vision lenses, which may be either segmented or non-segmented multi-vision lenses (such as, but not limited to, bifocal lenses, trifocal lenses and progressive tenses), as well as other elements used to correct, protect, or enhance (cosmetically or otherwise) vision, including without limitation, contact lenses, intraocular lenses, magnifying lenses, and protective enses or visors. As used herein the term "display" means the visible or machine-readable representation of information in words, numbers, symbols, designs or drawings. Non-limiting examples of display elements and devices include screens, monitors, and security elements, such as security marks. As used herein the term "window" means an aperture adapted to permit the transmission of radiation there-through. Non-limiting examples of windows Include automotive and aircraft transparencies, filters, shutters, and optical switches. As used herein the term "mirror" means a surface that specularly reflects a large fraction of incident light.

|0125J The optical element or device previously mentioned can further comprise a polarizer, e.g., a linear polarizer, a circular polarizer or an elliptical polarizer. Suitable polarizers are know In the art. For example, the polarizer can be linearly polarizing and can be in the form of a coating, a film, or a wafer. A polarizing coating can Include dichroic materials (including photochromic-dichroic materials) as described hereinbe!ow, and can be oriented in one or more directions as described below. Further, the polarizer may be in the form of a film which comprises a polymeric component and a dichroic material which is oriented in the direction in which the film is oriented. A polarizing wafer typically has a polarizer (either n the form of a polymeric film or a coating) sandwiched between two layers of transparent optical polymeric materials,

[0126] For example, the polarizer can comprise a polymeric component comprising polyvinyl alcohol), polyvinyl butyral), polyethylene terephihalate, cellulose acetate butyrate, celiuiose diacetate, cellulose triacetate, poiyurethane, polyether, polyester, polyamide, polyaiky!(meth)acryiate, mixtures thereof and/or copolymers thereof.

[0127] Also, the polarizer can comprise a linearly polarizing film comprised of an optical film including a disperse phase of polymeric particles disposed within a continuous birefringent matrix which film can be oriented in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of radiation of a desired wavelength in the film. Such films and their preparation are described in U.S. 5,887,316 at column 6, line 47, to column 20, line 51 , the cited portion of which is incorporated herein by reference. The polarizer, when linearly polarizing also can comprise the birefringent multilayer optical films described in U.S. 5,882,774, at column 2, line 63, to column 18, line 31 , the cited portion of which is incorporated herein by reference. Further, polarizer aiso can comprise a two-component polarizer (i.e., dichroic and reflective polarizing components) such as that described in U.S. 6,096,375 at column 3, line 7 to column 19, line 46, the cited portion of which is incorporated herein by reference.

[0128J Additionally, the polarizer can be linearly polarizing and can comprise oriented film of polyvinyl alcohol, vinyl butyral, polyethylene terephthalate, polya!kyi(meth)acryiate, polyamide, poly(amide-ether) block copolymers, pofy(ester-ether) block copolymers, poly(ether-ureihane) block copolymers, poly(ester-urethane) block copolymers, and/or poly(ether-urea) block copolymers. The term "oriented film" as used in conjunction with a linearly polarizer, means that the film has at least a first general direction (of alignment) such that one or more other structures or components comprising the sheet are positioned or suitably arranged along that same genera! direction. For example, the alignment or ordering of a dichroic compound along the long-axis of the dichroic compound is essentially parallel to at least the first general direction of the film or layer. As used herein with reference to order or alignment of a material or structure, the term "general direction" refers to the predominant arrangement or orientation of the material, compound or structure. Further, it will be appreciated by those skilled in the ail that a material, compound or structure can have a general direction even though there is some variation within the arrangement of the material, compound or structure, provided that the material, compound or structure has at least one predominate arrangement.

[01201 Suitable polarizers also can comprise a "K-type" polarizer in which the dichroic materiai(s) are prepared, for example, by dehydration of poly(vinylalcohol). Such polarizers often are referred to as inherent polarizers since the absorbing chromophobe is the result of conjugation in the polymer backbone, rather than due to dichroic materials, e.g., dichroic dyes, being added to the polymeric component. Such K-type polarizers can comprise a film of oriented polyvinyl alcohol) having light polarizing {dichroic) molecules comprised of conjugated blocks, such as poly(acetylene) blocks (i.e., 4CH=CH----] _n )= formed by heating the oriented poly(vinyl alcohol) film in the presence of a dehydration catalyst such as vapor of aqueous hydrochloric acid. K-type polarizers also can be formed by affixing an acid donor layer comprising a photoacid generator to the film of oriented polyvinyl alcohol), and exposing to radiant energy at a temperature sufficient to effect partial dehydration of the vinyiafcohol polymer to a vinylalcohol/poiy(acetylene) copolymer. See, for example, U.S. 6,808,657.

[0130] As previously mentioned, the polarizer can comprise a dichroic material. Non- limiting examples of suitable dichroic materials can include, but are not limited to compounds such as azomethines, indigoids, thioindigoids, merocyanines, indans, quinopnthaionic dyes, pery!enes, phthaloperines, triphenodioxazines, indoioquinoxaiines, imidazo-triazines, tetrazines, azo and (po!y)azo dyes, benzoquinones, naphthoquinones, anthroq _. uinone, {po!y)anthroquinones, anthropyrimidinones, iodine, and/or iodates. As used herein the term "compound" means a substance formed by the union of two or more elements, components, ingredients, or parts and inciudes, without limitation, molecules and macromoiecuies (for example poiymers and oligomers) formed by the union of two or more elements, components, ingredients, or parts,

[0131] The dichroic material aiso can comprise a polymerizable dichroic compound. That is, the dichroic material can comprise at least one group that is capable of being polymerized (I.e., a "polymerizable group'). For example, although not limiting herein, in one non-limiting embodiment the dichroic compound can have at least one alkoxy, poiyaikoxy, aikyl, or polyaikyi substitueni terminated with at least one polymerizable group,

|0132i The dichroic material also can comprise a photochromic-dichroic compound. The term "photochromic-dichroic" means displaying both photochromic and dichroic (i.e. , linearly polarizing) properties under certain conditions, which properties are at least detectibie by instrumentation. Accordingly, "photochromic-dichroic compounds" are compounds displaying both photochromic and dichroic (i.e., linearly polarizing) properties under certain conditions, which properties are at least detectibie by instrumentation. Thus, photochromic- dichroic compounds have an absorption spectrum for at least visible radiation that varies in response to at least actinic radiation, and are capable of absorbing one of two orthogonal plane polarized components of at least transmitted radiation more strongly than the other (i.e., capable of exhibiting dichroism. Additionally, as with conventional photochromic compounds discussed hereinbeiow, the photochromic-dichroic compounds disclosed herein can be thermally reversible. That is, the photochromic-dichroic compounds can switch from a first state to a second state in response to actinic radiation and revert back to the first state in response to thermal energy.

[0133] For example, according to various non-limiting embodiments disclosed herein, the photochromic-dichroic compound can have a first state having a first absorption spectrum, a second state having a second absorption spectrum that is different from the first absorption spectrum, and can be adapted to switch from the first state to the second state in response to at least actinic radiation and to revert back to the first state in response to thermal energy. Further, the photochromic-dichroic compound can be dichroic (i.e., linearly polarizing) in one or both of the first state and the second state. Fo example, although not required, the photochromic-dichroic compound can be linearly polarizing in an activated state and non- polarizing in the bleached or faded (i.e., not activated) state. As used herein, the term "activated state" refers to the photochromic-dichroic compound when exposed to sufficient actinic radiation to cause the at least a portion of the photochromic-dichroic compound to switch from a first state to a second state. Further, although not required, the photochromic- dichroic compound can be dichroic in both the first and second states. While not limiting herein, for example, the photochromic-dichroic compound can linearly polarize visible radiation in both the activated state and the bleached state. Further, the photochromic- dichroic compound can linearly polarize visible radiation in an activated state, and can linearly polarize UV radiation in the bleached state.

[G134J Examples of photochromic-dichroic compounds suitable for use in the present invention can include, but are not limited, to those described in detail in U.S. Patent Application Publication No. 2005/0012998A1 at paragraphs [0089] to [0339], which disclosure is incorporated herein by reference..

[0135] As previously mentioned, the polarizer can comprise an oriented polymeric film. The polymeric components and the dichroic material(s) (including dichroic-photochromic materials as described above) used to prepare such polymeric film(s), and any other components which may be included, can be blended together and then subjected to any of a variety of processing techniques known in the art to form the film. Such techniques can include, for example, extrusion, solvent casting, calendering, blowing, molding, or combinations of such techniques. Alternatively, the composition used to prepare the polymeric component can be blended together and subjected to any of a variety of processing techniques known in the art to form the film. Once the film is formed, a solution comprising the dichroic material(s) can be incorporated info the film, such as by an imbibition process well know in the art, and the imbibed film then can be oriented to align the dichroic material(s).

[0138] The film can be fixed in the oriented configuration by any of a variety of fixing means known in the art. For example, a film oriented by stretching can be fixed in the oriented configuration to prevent recovery of the sheet to the pre-stretched configuration by mechanically fixing means (such as by the use of clamps). Other means can include thermofixing or thermal annealing, i.e., fixing the oriented film by heating. Where the film is prepared from reactive (e.g., crosslinkabfe) polymeric components, the film can be formed, such as by extrusion or solvent casting, in such a way that the components do not react. Once formed, the film can be oriented then fixed in the oriented configuration by reacting (e.g., crosslinking, including seif-crossiinking) the polymeric components. For example, such crosslinking can be effectuated by subjecting the oriented film to conditions which promote the reaction of the functional groups of any reactive polymeric components, e.g., subjecting the oriented sheet to heat or radiation sncluding actinic (ultraviolet) and/or ionizing (electron beam) radiation,

[0137] Additionally or alternatively, polymerizates prepared from the polymerizabie compositions of the present Invention can be used to prepare photochromic articles, Including but not limited to, photochromic lenses.. When used to prepare photochromic articles, such as photochromic tenses, the polymerizate should be transparent to that portion of the electromagnetic spectrum which activates the photochromic subsiartce(s) incorporated in the matrix. More particularly, the polymerizate should be transparent to that wavelength of ultraviolet (UV) light that produces the colored or open form of the photochromic substance and that portion of the visible spectrum thai includes the absorption maximum wavelength of the photochromic substance In its UV activated form {or open form). Photochromic substances that can be utilized with the polymerizates of the present invention include, but are not limited to, organic photochromic compounds or substances containing same that can be either: (a) incorporated {e.g., dissolved, dispersed or diffused) into such polymerizates; or (b) added to the polymerizabie composition prior to polymerization.

[0138] The present invention also relates to photochromic articles that include; (a) a polymerizate of one or more polymerizabie compositions of the present inveniion; and (b) a photochromic amount of an organic photochromic material,

[0139] Examples of classes of organic photochromic materials thai can be included in the photochromic articles of the present invention include, but are not limited to,

spiro(indoline)naphthoxazines, spiro(indoline)benzoxazines, benzopyrans, naphthopyrans, chrornenes, organo-meta! dithizonates, fulgides and fulgimides and mixtures or

combinations of two or more thereof.

0140J A first group of organic photochromic substances contemplated for use to form the photochromic articles of the present invention are those having an activated absorption maximum within the visible range of greater than 590 nanometers, e.g., between greater than 590 to 700 nanometers. These materials typically exhibit a blue, bluish-green, or bluish-purple color when exposed to ultraviolet Sight in an appropriate solvent or matrix. Examples of classes of such substances that are useful in the present invention include, but are not limited to, spiro(indoline)napht oxazines and spsro(indoiine)benzoxazines. These and other classes of such photochromic substances are described in the open literature. See for example, U.S. Patent Numbers ; 3,562,172; 3,578,602; 4,215,010; 4,342,668; 5,405,958; 4,637,898; 4,931 ,219; 4,816,584; 4,880,667; 4,818,096. See also, for example: Japanese Patent Publication 62/195383; and the text, Techniques in Chemistry, Volume IN, "Photochromism," Chapter 3, Glenn H. Brown, Editor, John Wiley and Sons, inc., New York, 1971.

[0141] A second group of organic photochromic substances contemplated for use to form the photochromic articles of the present invention are those having at least one absorption maximum and preferably two absorption maxima, within the visible range of between 400 and less than 500 nanometers. These materials typically exhibit a yellow-orange color when exposed to ultraviolet light in an appropriate solvent or matrix. Such compounds include certain chromenes, such as benzopyrans and naphthopyrans. Examples of such chromenes are described in the following non-limiting list of U.S. Patent Numbers: 3,567,805; 4,826,977; 5,066,818; 4,826,977; 5,066,818; 5,466,398; 5,384,077; 5,238,931 ; and 5,274,132.

[0142] A third group of organic photochromic substances contemplated for use to form the photochromic articles of the present Invention are those having an absorption maximum within the visible range of between 400 to 500 nanometers and another absorption maximum within the visible range of between 500 to 700 nanometers. These materials typically exhibit color(s) ranging from yellow/brown to purple/gray when exposed to ultraviolet light in an appropriate solvent or matrix. Examples of these substances include, but are not limited to, certain benzopyran compounds, having substituents at the 2-position of the pyran ring and a substituted or unsubstituted heterocyclic ring, such as a benzothieno or benzofurano ring fused to the benzene portion of the benzopyran. Such materials are described In U.S. Pat. No. 5,429,774.

[0143] Other photochromic substances contemplated are photochromic organo-meta! dsthizonates, such as (aryiazo)-t ioformic ary!hydrazidates, including, for example, mercury dithizonates, which are described in, for example, U.S. Pat No. 3,361 ,706. Fulgides and fulgimides, such as 3-furyl and 3-thienyl fulgides and fulgimides, are described in U.S. Pat. No. 4,931 ,220 at column 20, line 5 through column 21 , line 38,

[0144] The disclosures relating to such photochromic substances in the above described patents are incorporated herein by reference in each case in their entirety. The photochromic articles of the present invention can contain one photochromic substance or a mixture of two or more photochromic substances, as desired. Mixtures of photochromic substances can be used to attain certain activated colors such as, but not limited to, a near neutral gray or brown.

[0145] Each of the photochromic substances described herein can be used in amounts and in ratios (when mixtures are used) such thai a poiymerizaie to which the mixture of compounds is applied or in which they are incorporated exhibits a desired resultant color, such as a substantially neutral color, such as shades of gray or brown when activated with unfi!iered suniight. With some embodiments, a near neutral or neutral color can be obtained with the colors of the activated photochromic substances. The refatsve amounts of the aforesaid photochromic substances used can vary and depend in part upon the relative intensifies of the color of the activated species of such compounds, and the ultimate color desired.

[0146] The photochromic compounds or substances described herein can be applied to or incorporated into the polymerizate by various methods described in the art. Such methods include, but are not limited to, dissolving or dispersing the substance within the polymerizate, such as; imbibition of the photochromic substance into the polymerizate by immersion of the polymerizate in a hot solution of the photochromic substance or by thermal transfer; providing the photochromic substance as a separate layer between adjacent layers of the polymerizate, such as a part of a polymer film or polymer layer; and applying the photochromic substance as part of a coating or polymer layer placed on the surface of the polymerizate. The term "imbibition" or "imbibe" means permeation of the photochromic substance or substances alone into the polymerizate, solvent assisted transfer absorption of the photochromic substance(s) into a porous polymer, vapor phase transfer, and other such transfer mechanisms.

[01473 The amount of photochromic substance(s) or composition containing photochromic substance(s) applied to or incorporated into the polymerizate is not critical provided that a sufficient amount is used to produce a photochromic effect discernible to the naked eye upon activation. Generally, such amount can be described as a photochromic amount, The particular amount used depends often upon the intensity of color desired upon irradiation thereof and upon the method used to incorporate or apply the photochromic substances. Typically, the more photochromic substance applied or incorporated, the greater is the color intensity. With some embodiments, the amount of total phoiochromic substance incorporated into or applied to a photochromic optical polymerizate can range from 0.15 to 0,35 milligrams per square centimeter of surface to which the photochromic subsfance(s) is incorporated or applied.

[0148] it is also contemplated that photochromic substances can be added to the polymerizab!e compositions of the present invention prior to curing. When this is done, however, it is preferred that the photochromic substance(s) be resistant to potentially adverse interactions with initiator(s) that can be present and/or the sulfide linkages within the monomers that form the polymerizate. Such adverse interactions can result in deactivation of the photochromic substance(s), such as by trapping them in either an open or closed form. Organic photochromic substances sufficiently encapsulated within a matrix of an organic polyrrterizate, as described in U.S. Pat. No. 4,931 ,220, can also be incorporated into the po!ymerizable compositions of the present invention prior to curing.

EXAMPLES

[0149] The present invention is more particularly described in the following examples, which are intended to be illustrative only, since numerous modifications and variations therein will be apparent to those skilled in the art. Unless otherwise specified, ail parts and percentages are by weight

Example 1 - Synthesis of Formula (lb)

Step 1

The materials listed below were charged to a 500 ml. round bottom flask that was equipped with a reflux condenser, a magnetic stirrer, and an oil heating bath, and the mixture was stirred at 100°C for 1 hour.

Material Wejghi^ams Number of Motes

DMDS' 50.00 g 0.32

Ethylene carbonate 62.00 g 0.70

Potassium carbonate 2,34 0.017

Dim eth yifor n amide SO.O

( 1 ) Dimercaptodiethylsulfide

Frothing of the reaction mixture occurred due to the evolution of carbon dioxide gas formed during the reaction. The resulting product mixture was cooled to room temperature and poured into 100 ml of water, with agitation. The resulting precipitated product was isolated by suction filtration, washed with ethanol and ethyi acetate, and dried in a vacuum chamber at ambient room temperature. Nuclear magnetic resonance ("N R") spectra showed the product to have a structure consistent with the following chemical formula:

Step 2

The materials listed below were charged to a 500 mL 4-neck round bottom flask that was equipped with a thermometer, a reflux condenser, a mechanical stirrer, an air inlet/bubbling tube, and an oil heating bath, and the mixture was heated to reflux while being sparged with air. Material Weight grams Number of Moles

Product Step 1 45.00 g 0.186

Methyl methacrylate 106.00 g 1 .06

Cesium carbonate 0.S8 0.0027

4-Methoxyphenoi (MEHQ) 0.88 0.0071

Heptanes 120

Fractions of distillate were collected periodically, and analyzed by gas chromatography in order to monitor the generation of methanol from the reaction. Additional heptane solvent was added periodically in order to mainiair! the reaction mixture at an approximately constant volume. After a reaction time of approximately 4 hours at 85- 97°C, methanol was no longer being generated, and the reaction mixture was cooled to room temperature, and washed three times with 50 ml. of 10 weight percent aqueous sodium hydroxide solution in order to remove excess MEHQ. Activated carbon (2 grams) was added, followed by stirring at room temperature for 1 hour, filtration, and concentration under vacuum on a rotary evaporator. N R spectra showed the product to have a structure consistent

Example 2. Synthesis of a Mixture of Formula (lb) + Formula (Id ), where p = 1 , R ¹ - CH ₃ , R ² = -CH2-C.H2-S-CH2-CH2-, ³ = -CH _? -CH _i; - _t R ⁶ = CH ₃ , and R ⁷ = CH ₃

Step l

The materials listed below were charged to a 200 roL round bottom flask that was equipped with a water cooled condenser and a magnetic stirrer, and mixed at ambient room temperature for approximately 120 hours.

Ma riii Weight, grams Number of Moles

DMDS ^{1) 61 .6 g 0.40

2,2-dimethoxypropane 10.4 g 0.10

p-TSA ^{! )} 0.05 0.00026

(2) p-toluenesulfonic acid Residual voiatiles were removed from the resulting product mixture by vacuum stripping with a rotar evaporator. HMR spectra showed the products to have structures consistent with the following chemical formulas in the proportions indicated:

Step 2

The materials listed below were charged to a 500 mL round bottom f!ask that was equipped with a reflux condenser, a magnetic stirrer, and an oil heating bath, and the mixture was stirred at 100°C for 1 hour.

Material Weight, grams Number of Moles

Product Mixture of Step 1 50.00 g 0.23 ^(¾

Ethylene carbonate 44.27 g 0.50

Potassium carbonate 1.72 0.012

Dimethyiformamide 50.0

(3) Based on average molecular weight of 218,

Frothing of the reaction mixture occurred due to the evolution of carbon dioxide gas formed during the reaction. The resulting product mixture was cooled to room temperature, and poured into 100 mL of water with agitation. The resulting precipitate was isolated by suction fittration, washed with ethanol and ethyl acetate, and dried in a vacuum chamber at ambient room temperature. HMR spectra showed the products to have structures consistent

Step 3

The materials listed below were charged to a 500 mL 4-neck round bottom flask that was equipped with a thermometer, a reflux condenser, a mechanical stirrer, an air inlet/bubbling tube, and an oil heating bath, and the mixture was heated to reflux while being sparged with air,

Material Weight, grams Number of Moles

Product of Step 2 42,53 g 0.14-

Methyl methacrylate 83.93 g 0.84

Cesium carbonate 0.72 0.0022

4-Methoxyphenol {MEHQ) 0.72 0.0058

Heptanes 120

Based on average molecular weight of 306,

Fractions of distillate were collected and analyzed by gas chromatography in order to monitor the generation of methanol from the reaction. Additional heptane solvent was added periodically in order to maintain the reaction mixture at an approximately constant volume. After a reaction time of approximately 4 hours at 85-97 ^c C, methanol was no longer being generated, and the reaction mixture was cooled to room temperature, and washed three times with 50 ml. of 10 weight percent aqueous sodium hydroxide solution in order to remove excess MEHQ, Activated carbon (2 grams) was added, followed by stirring at room temperature for 1 hour, filtration, and concentration under vacuum on a rotary evaporator. N R spectra showed the products to have structures consistent with the following chemical formulas in the proportions indicated:

The materials listed below were mixed with a magnetic stirring bar at 30-35°C, for 1 hour, and then injected into a two-part flat glass mold with a cavity thickness of 1 mm, and cured in a forced air oven using Cure Cycle #1 in Table 1 shown below. The polymer properties of the resulting clear polymer sheets are listed In the Table 2 table below. Example 1 A Example 2A

Material Weight, grams Weight, grams Product of Example 1 7.39

Product of Example 2 - 7.39

Y-Terpinene 0.11 0.11

Luperox 256 ^® oeroxide ^(S) 0.165 0.165

Reported to be 2,5-dimethyi-2 _s 5-di(2-eihy!hexanoyiperoxy) hexane from Arkema

Table 1 - Cure Cycle #1

Table 2 - Polymer Properties

thickness) ^(S) |

Fischer microhardness was tested according to ISO 14577-07 and was measured using a F!SCHERSCOPE® H-100SMC available from Fischer Technology, Inc. The Fischer microhardness (FMH) of the polymerizates, ± 3 Newtons/mm ² , was measured at a load of 300 milliNewton (mN), following a load application of 0-300 mN in 15 seconds. The results are an arithmetic average of 5 measurements.

The refractive index and Abbe Number were measured at 546 nm {mercury e-line) and 23°C using a METRIC ON ^® Model 2010 prism coupler according to ASTM C1648-06. (8) The yellowness index was measured using a HunterLab ULTRASCA ® PRO according to ASTM £313-10. The path length for the samples was equal to the sample thickness.

Polymer Casting of Example 1 with different Polymerization Moderators

The materials listed In Tables 3 and 4 below were mixed with a magnetic stirring bar at approximately 25°C, for 1 hour and injected into a two-part fiat glass mold with a cavity thickness of 3 mm. Examples I B through 1 M in Tables 3 and 4 were cured in a forced air oven using Cure Cycle #2 in Table 5 shown below; and Examples 1 to 1 R in Table 8 were cured in the same fashion except using Cure Cycle 3 in Table 7. The poiymer properties of the resulting clear poiymer sheets of Examples 1 B to 1 L and Comparative Example 1 (CE-1 ) are listed in Tables 3 and 4 below and those of Examples 1 to 1 R are in Table 6,

Table 3 - Examples 1 B through 1 G

A process subject to erratic and/or excessive rates of polymerization, leading to severe striation, and/or significant surface irregularities, and/or severely fractured or broken sample.

Refers to the polymer sample (sheet or lens) having fissures and/or being broken. Refers to pre-mature separation of the polymer sheet or tens tested below from the glass mold during the cure cycle, resulting in a surface defect.

Table 4 -Examples 11 through 1

Table 5 - Cure Cycle #2

Tabie 6 - hxamp!es 1 N through 1 R

Reported to be l .l-di^ert-butylperoxy^-S.S.S-trimethyicyclohexane from Arkema Inc.

Table 7 - Cure Cycle #3

Polymer Lens Casting of Example 1

The materials listed in Tabtes 8 and 10 below were mixed with a magnetic stirring bar at 20-25 °C for 1 hour and injected into a (-7) diopter finished single vision (FSV) 83 mm diameter iens mold constructed from a front circular glass mold (1.5) diopter curvature and a back circular glass mold (-9) diopter curvature, a spacer gasket made of

ethylene/propylene/diene monomer rubber, and a metal spring clamp. The final cast lenses had a center thickness of 2.0 mm, edge thickness 14 mm, and diameter 75 mm.

Examples 1 S through U in Table 8 were cured in a forced air oven using Cure Cycle #4 in Table 9 shown below; and Examples 1 V and 1W in Table 10 were cured in the same fashion except using Cure Cycle #5 in Table 1 1 . The number of the {-7} diopter lenses cast as the percentage of those that were pre-reieased are included in these tables.

Table 8 ~ Examples 1 S through 1 U

Table 9 - Cure Cycle #4

Table 10 - Examples W and 1W

Table 1 1 - Cure Cycle #5

Example 3 -Synthesis of Formula IV

Step 1

Potassium carbonate (8.06 g, 0.06 moie eq.) was added to a soiution of a 2/1 (mol/mo!) adduct (396.91 g, 2.12 mole eq, by thiol) of dimercaptodiethyisuifide (D DS) and propargy! alcohol (PA) prepared according to the procedure of Example 1 of U.S. Patent 7,553,925 B2, which disclosure is incorporated herein by reference, and dimethyiformamide (250 ml) i a 1000-mL round bottom flask equipped with a magnetic stir bar and fitted with a temperature probe, reflux condenser and nitrogen inlet. Ethylene carbonate (207.17 g, 2.35 mole eq.) was subsequently added to the mixture. The reaction fiask was set in an oil bath for heating on a hotplate. The reaction mixture was gradually heated to 90*C over the course of several hours. The reaction was evidenced by bubbling as a result of the evolution of carbon dioxide gas. Once the bubbling stopped, the reaction mixture was allowed to cool This mixture was gradually added to ice-water under agitation, forming a precipitate. This precipitate was filtered and washed multiple times with water, Upon final filtration and drying, 493 g of a tannish colored solid was obtained. The resulting trio! was characterized as having a hydroxy I number of 344 mg/g (theoretical 364 mg/g). Step 2

The product of Step 1 (362.02 g, 2.13 mole eq.), triethylamine (258.74 g, 2,56 mote eq.}, and tetrahydrofuran (550 ml) were added to a 2000 ml round bottom flask equipped with a stirrer, addition funnel and nitrogen inlet. The resulting solution was cooled to 6°C, and methacfyioyi chloride (245g, 2,34 mole eq.) was added dropwise via an addition funnel. The addition rate was maintained so that the reaction temperature did not exceed 10°C. Upon completion of the addition, the reaction mixture was allowed to come to ambient temperature. The reaction mixture was filtered to provide a liquid, which was later dissolved in methylene chloride. The resulting solution was washed: using 5 weight percent HQ, 10 weight percent NaHC0 ₃ , and water until a neutral pH was achieved. The solution was dried over gS0 ₄ , and solvent was removed under reduced pressure to provide 403 g of liquid product. No residual hydroxy I groups were determined by analysis.

Polymer Casting _. Procedure for Exam 3

Polymers prepared with Example 3 were based on the following casting composition; 98.5 weight percent monomer; 1.5 weight percent γ-terptnene; and 2.2 parts per hundred (phr) Luperox 256 ^® peroxide ⁽⁵ The monomer compositions are listed below in Table 12. The components were charged to a vessel and mixed until a homogeneous mixture was obtained. The mixture was briefly held under reduced pressure, and then injected into a two-part flat glass moid with a cavity thickness of 3.2 mm. The filled mold was subjected to heating in a forced air oven using a pre-determined curing cycles #6 or #7 listed in Tables 14 and 15. Upon completion of the cure cycle, the mold was allowed to cool and the polymer was released from the moid. The resulting polymer properties are summarized in Table 13,

Table 12 - Monomer Compositions in Weight Percent

Reported to be tns(2-hydroxyethyi)tsocyanurate triacrylate from Sartorner Compar Table 13 - Casting Summary

fable 14 - Cure Cycle #6

Table 15 ~ Cure Cycle #7

Synthesis of Co-monomer A o Formula (lib)

BiS"[(2-methacryioylihlo)ethyl] sulfide (i.e., Formula (lib), where R ⁸ ~ CH ₃ ) was synthesized from DMDS and methacryioyi chloride, according to the procedure given in the following reference: Tatsuhito Matsuda, Yasuaki Funae, Masahtro Yoshida, and Tetsuya Yamarnoto, "Move! Bifunctiona! Thiolcarboxyiic Acid Esters Useful as Crossisnking Agents for Optical Materials/' Synthetic Communications, 30 (16), pp. 3041-3045 (2000), which disclosure is incorporated herein by reference.

Synthesis of Co-monomer B of Formula ill, where L ⁴ ~ ~CHz-CH ₂ -S-CH ₂ -CH2-, L ⁵ - -CH ₂ ~ CH; ^, - _; R ⁹ = CH ₃ , R ¹⁰ = CH ₃ , and u = 2

The amounts of ethylene glycol dimethacryiate and D DS listed in the table below were mixed together in a glass bottle, using a magnetic stirrer, for approximately 30 minutes at 20-25 °C. The TOP catalyst (trioctylphosphine) was then added, whereupon the mixture became hoi due to an exothermic reaction. The resulting mixture was stirred with a magnetic stirrer for approximately 2 hours. Analysis by iodometric titration revealed that all of the SH groups of the DMDS had been reacted.

Casting of Various Mixtures of Example 1 and Co-monomers A and S to produce Examples 4 to 9 and CE-2

The materials listed in Table 16 below were mixed with a magnetic stirring ba at 30- 35°C, for 1 hour, and injected into a two-part flat glass moid with a cavity thickness of 3.2 mm, and cured in a forced air oven using Cure Cycle #8 in Table 17 shown below. The polymer properties of the resulting clear polymer sheets are listed in Table 16.

16 - Examples 4 through 9 and CE-2

fable 17 - Cure Cycle #8

[0150] The present invention has been described with reference to specific details of particular embodiments thereof. It is not intended that such details be regarded as limitations upon the scope of the invention except insofar as and to the extent that they are included in the accompanying claims.