This invention relates to thermoplastic molding compositions having improved processability and notched Izod impact strength characteristics comprising (a) a bisphenol-A polycarbonate;

(b) an alcohol terminated polyester of ^'• neopentyl glycol (.2,2-dimethyl-l,3- propane-diol) and adipic acid; in admixture with Cc} a minor amount of at least one component selected from the group comprising poly- ole ins, olefin based copolymers and olefin based terpolymers, such as, ethylene- propylene copolymers, ethylene-butadiene copolymers, propylene-butadiene copolymers, ethylene-propylene-butadiene terpolymers, ethylene-acrylic acid copolymers, propylene- acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers and ethylene-propylene-acrylic acid terpolymers; or Cd} an amount of at least one component selected from the group comprising methyl metha¬ crylate-butadiene-styrene copolymers, methyl methacrylate-acrylonitrile-butadiene- styrene copolymers and acrylonitrile- butadiene-styrene copolymers.

^' BUR ^E AfT OiWPI ,- WIPO »

-2-

Background of the Invention

Bisphenol-A polycarbonate polymers are excellen molding materials as products made therefrom have relatively high impact strength, toughness, high transparency, wide temperature limits thigh impact resistance below --60 ^o C and a UL thermal endurance rating of 115°C with impact) , good dimensional stability, high creep resistance and electrical properties which qualify it as sole support for • current carrying parts,

Bisphenol-A polycarbonates are, however, very dif icult to fabricate from melts for the reason tha melts thereof have exceptionally high viscosities. Attempts to overcome this difficulty by the incorpor tion into the polycarbonate of materials known to reduce the viscosity of other resins have very generally been unsuccessful. Many s ^' tandard viscosit control agents appear to have little or no effect on the viscosity of polycarbonates. Some compounds, which are conventionally employed to improve the workability of polymers, produce an embrittling effect on polycarbonates when -they are mixed therewith and the mixture is subjected to elevated temperatures as in molding. Still other materials, while satisfactory stiffness modifying agents for other plastics, are too volatile to be incorporated into polycarbonates since polycarbonates have much higher melting points than many other thermoplastics. It has now been found that the incorporation of a relatively minor amount of an oligomeric ester plasticizer, such as, an alcohol terminated oligomer ester of neopentyl glycol (. ,2-dimethyl-l,3-propane- dioll and adipic acid in admixture with a minor amount of an olefinic impact modifier, such as, for

-3- example, polyolefins, olefin based copolymers and olefin based terpolymers, such as, ethylene-propylene copolymers, ethylene-butadiene copolymers, propylene- butadiene copolymers, ethylene-propylene-butadiene terpolymers, ethylene-acrylic acid copolymers, propylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers and ethylene-propylene acrylic acid terpolymers; or in admixture with an amount of an acrylic rubber impact modifier, such as, for example ^' , methyl methacrylate-butadiene-styrene copolymers, methyl methacrylate-acrylonitrile-butadiene-styrene copolymers, and acrylonitrile-butadiene-styrene copolymers; into a bisphenol-A polycarbonate will significantly improve the processability of the resultant polycarbonate molding material and, at the same time, provide a material having improved notched zod impact strength characteristics. Description of the Invention The present invention provides for a novel thermoplastic molding composition which comprises Ca) a bisphenol-A polycarbonate; Cb) an alcohol terminated polyester of neopentyl glycol (2,2-dimethyl-l,3- propane-diol) and adipic acid; in admixture with c) a minor amount of at least one component selected from the group comprising poly¬ olefins, olefin based copolymers and olefin based terpolymers, such as, ethylene- propylene copolymers, ethylene-butadiene copolymers, propylene-butadiene copolymers, ethylene-propylene-butadiene terpolymers,

-4- ethylene-acrylic acid copolymers, propylene acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers and ethylene-propylene-acrylic 5 acid terpolymers; or

(d) an amount of at least one component selected from the group comprising methyl • methacrylate-butadiene-styrene copolymers, methyl methacrylate-acrylonitrile-butadiene 10 styrene copolymers and acrylonitrile- butadiene-styrene copolymers► The polycarbonate resin has recurring units of the formula

20 wherein each -R- is selected from the group consisting of phenylene, halo-substituted phenylene and alkyl substituted phenylene, and X and Y are each selected from the group consisting of hydrogen hydrocarbon radicals free from aliphatic unsatura-

25 tion and of radicals which together with the. adjoining.

30 atom from a cycloalkane radical, the total number of carbon atoms in X and Y being up to 12.

~S~ The preferred polycarbonate resins may be derived from the reaction of bisphenol-A and phosgene. These polycarbonates have from 10-400 recurring units of the formula:

The polycarbonates are described in U.S.

Patents Nos. 3,028,365; 3,334,154 and 3,915,926 all of which are incorporated by reference. The poly- carbonate should have an intrinsic viscosity between 0.2 and 1.0, preferably from 0.30 to 0.65 as measured at 20°C in methylene chloride.

The oligomeric ester plasticizers useful in the composition of the present invention will have molecular weights in the range of from 200 to

2Q,Q0Q and preferably from about 500 to about 5,000. The preferred oligomeric ester plasticizer for use in the compositions of the present invention is

KODAFLEX^ NP-10 manufactured and sold by Eastman Chemical Products, KODAFLEX*^ NP-10 is an alcohol terminated oligomeric ester of neopentyl glycol

(.2,2-dimeth l-l,3-propane-diol) and adipic acid.

The oligomeric ester component may be present in an amount from about 0.1 to 10 weight percent based upon the polycarbonate and preferably will be present in an amount from about 1 to about 5 weight percent.

-6- The polyolefin copolymers, such as ethylene- propylene copolymers, and olefin terpolymers, such as ethylene-propylene-butadiene terpolymers, which may be suitably employed in practicing the present invention are all commercially available products whose preparation is well known.

The. όlefin-acrylic acid copolymers, such as ethylene-acrylic acid copolymers, and diolefin- acrylic acid terpolymers, such, as ethylene- propylene-acrylic acid terpolymers, and other . olefin based thermoplastic elastomers, which may be suitably employed in practicing the present invention are also commercially available products whose preparation is well known, as will be readily apparent to those skilled in the art.

Exemplary of various commercially available products which may be advantageously employed as olefinic impact modifying agents in practicing the ,present invention are the following compositions: - PROEAX^ 6301, PROFAX^ 6601, PROFAX^ 6701 and PRQFAX*- 6801, all prog lene homopolymers;

PROFAX--*- 7601 AND PROFA2 8601, both ethylene- propylene block copolymers; all of which are les, Inc.; LB 703, both ethylene homopolymers, manufactured and sold by USI Chemical -_ DOW^EAA 435, DOW ^* ^ EAA 449, DOJ^ EAA 455,

DOW ^*5 ' EAA 459, DO^XD 2375.28 and DOW ^* ^ XD 2375.29; all ethylene-acrylic acid copolymers manufactured and sold by the Dow Chemical Company;

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O

-7.

V

- MICROTHENas^ FN 510, an ethylene homopolymer;

- MICROTHENE^ FE 532, an ethylene-vinyl acetate copolymer;

EY 905, all ethylene-vinyl acetate copolymers, manufactured^nd sold by USI Chemicals;

- DEXON-^ 1004, a propylene-acrylic acid copolymer, manufactured and sold by Exxon Chemicals; - SO ElS 401T, SO EE- 402T and SOMEDS' 301G, all olefin based thermoplastic elastomers, manufactured and sold by the DuPont Company; and

- EPOLENE ¹ ^C-17, an olefin oligomer, manufactured and sold by Eastman Chemical Products. The compositions of the present invention may contain from about 0.1 to about 10 percent by weight of the combined olefinic impact modifying component(s) described above, based upon the weight of poly¬ carbonate, without taking into account the amount of plasticizer or agents which may be employed, and will preferentially contain from about 2 to about 6 percent by weight of the combined olefinic impact modifying component(s) .

The acrylic rubber components such as methyl methacrylate-butadiene-styrene, methyl methacrylate- acrylonitrile-butadiene-styrene and acrylonitrile- butadiene-styrene which may be suitably employed in practicing the present invention are all commercially available products whose preparation is well known.

IfURE^

QMPI

The acrylic rubber impact modifying agent may be present in an amount from about 0.1 to about 50 weight percent based upon the polycarbonate and preferably will be present in an amount from about 2 to about 20 weight percent.

Exemplary of various commercially available products which may be advantageously employed as acrylic rubber impact modifying agents in practicing the present invention are the following compositions: -N ~.

- BLENDEX^ 111N and BLENDEX^ HIS, both methyl methacrylate-butadiene-styrene copolymers, manufactured ajad sold by Borg-Warner Corporation;

- BLENDEX^ 436, a methyl methacrylate acr lo-nitrile-butadiene-styrene copolymer, manufactured and sold by Borg-Warner Corporation; and

- ACRYLOID^ KM 611, a methyl methacrylate- butadiene-styrene copolymer, manufactured and sold by Rohm ^' Haas, The compositions of.the present invention may be prepared by any standard procedure and the particular method employed is not critical.

•»The compositions of the present invention may al include flame retardants such as those described in U.S. Patent No. 3,915,926 which is incorporated herei by reference.

As will be apparent to one skilled in the art, other materials may also be advantageously employed in admixture with the bisphenol-A polycarbonate compositions of the present invention and include such materials as anti-static agents, pigments, ^■ thermal stabilizers, ultraviolet stabilizers, reinforcing fillers and the like.

_ ^~

-9-

Description of the Preferred Embodiments

The following examples are set ^' forth to further illustrate the present invention and are not to be construed as limiting the invention thereto. Example I - Control

1Q0 parts by weight of a bisphenol-A poly¬ carbonate having an IV of 0,51, was prepared, extruded in a twin screw extruder and molded into sample parts of approximately 1/8 inch thickness. The results of melt flow rate test performed according to the procedure set forth in ASTM D-1238, condition 0, and .notched Izod impact test performed in accordance with ASTM D-256 on this material are given in Table I, Example II - III

Various blends of a bisphenol-A polycarbonate having an IV of Q.51, and varying amounts of

R KODAFLEX NP-LQ were prepared, extruded and molded into sample parts in the same manner as was done in Example I. The results of melt flow rate and notched

Izod impact test performed on the resultant materials are set forth in Table I.

Example IV - Control

100 parts by weight of a bisphenol-A polycarbonate having an IV of 0,46 was prepared, extruded and molded into sample parts in the same manner as was done in

Example I. The results of melt flow rate and notched

Izod impact tests performed are set forth in Table I.

-10- Example V A blend of 95 parts by weight of a bisphenol-A •polycarbonate having an IV of 0.46 and 5 parts by weight of KODAFLEX ^* --' NP-10 was prepared, extruded in a twin screw extruder and molded into sample 5 parts in the same manner as was done in the previous examples. The results of melt flow rate and notched Izod impact tests performed on this material are set forth in Table I.

^" BU

TABLE I - EXAMPLES I-V EFFECT OF PLASTICIZER ONLY

Composition Example Example Example Example Example (parts by weight) I II III IV V

Poly

(BP Carbonate) 100 98 95

Poly _b

(BPA Carbonate) 100 95

R KODAFLEX NP-10 5

I

H

Properties i- I

Melt Flow Rate (Gr./lO min.) 10.1 13.7 33.3 13.5 38.4

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.) , kg-cm/cm (15.2)82.7 (1.8)9.8 (1.0)5.4 (14.7)80.0 (0.9)4.9

-12- Exa ple VI - Control

100 parts by weight of a bisphenol-A poly¬ carbonate having an IV of 0.51 was prepared, extruded in a twin screw extruder and molded into sample parts of approximately 0.32 cm Cl/8 inch) and £.,64 cm Cl/4 inch) thickness in the same manner as was done in the previous examples. The results of melt flow rate and notched Izod impact tests performed on the resultant material are set forth in Table II. Examples Vir - XXII

^■ Various blends of a bisphenol-A polycarbonate having an IV of 0.51 and various quantities of dif erent olefinic impact modifiers as set forth in Table II were prepared, extruded and molded into sample parts of 0,32 cm Cl/8 inch) and 0.64 cm Cl/4 inch) thickness in the same manner as was done in the previous examples. The results of nothced Izod impact tests performed on these materials are also set forth in Table II, Example XXIJTI - Control

100 parts by weight of a bisphenol-A polycarbona having IV of 0.46 was prepared, extruded and molded into sample parts of 0,32 cm Cl/8 inch) and 0.64 cm Cl/4 inch) thickness in the same manner as was done in the previous examples. The results of melt flow rate and notched Izod impact tests performed on this material are set forth in Table II.

-13- Examples XXIV - XXIX Various blends of a bisphenol-A polycarbonate having an IV of 0,46 and various amounts of different olefinic impact modifying agents as set forth in Table II were prepared, blended and molded in sample parts of 0,32 cm Cl/8 inch) and 0,64 cm (1/4 inch) thickness. The results of melt flow rate and notched Izod impact tests performed on these materials are also set forth in Table II.

TABLE II - EXAMPLES VI - XXIX EFFECT OF OLEFINIC IMPACT MODIFIERS ONLY

Composition Example Example Example Example Example (parts by weight) VI VIII X

Poly -

(BPA Carbonate) 100 95 95 95 100

Impact Modifier PROFA PROFA: ROFAX-^ PROFA ^

Type - 6601 7601 8601 6801

Amount - 5 5 5 3

Properties HI

*-. 1

Melt Flow Rate (Gr./lO min.) 10.1 13.2 13.0 12.3 11.9

TABLE II - EXAMPLES VI - XXIX (cont'd) EFFECT OF OLEFINIC IMPACT MODIFIERS ONLY

Composition Example Example Example Example Example (parts by weight) XI XII XIII XIV XV

Poly

(BPA Carbonate) ^* * 100 100 100 100 100

Impact Modifier PROFA: PROFA PROFAX^ VYNATHENE^ VYNATHENE^

Type 6301 6301 6301 EY 901 EY 902

Amount 2 4 6 4 4

Properties

Melt Flow Rate (Gr./lO min.) 10.5 12.0 15.3 13.3 13.5

Notched Izod (1/8") 0.32 cm; (Ft-lb/ln.), kg-cm/cm (14.1)76.7 (14.0)76.2 (14.0)76.2

Notched Izod (1.4") 0.64 cm (Ft-lb/in.) kg-cm/cm (8.0)43.5 (10.6)57.7 (9.5)51.2 (14.3)77.8 (13.9)75.6

TABLE II - EXAMPLES VI - XXIX (cont'd)

EFFECT OF OLEFINIC IMPACT MODIFIERS ONLY

Composition Example Example Example Example Example (parts by weight) XVI XVII XVIII XIX

Poly

(BPA Carbonate) 100 100 100 100 100 Impact Modifier VYNATHEN ilt) MICROTHENE MICROTHENE

Type EY 903 EY 904 EY 905 FN 510 FN 510

Amount 4 4 4 2 4

Properties • 1

H

Melt Flow Rate 1 (Gr./lO min.) 13.1 12.6 13.2 11.1 12.2

Notched Izod (1/4") 0.64 cm; (Ft-lb/in.), kg-cm/cm (15.3)83.2 (15.0)81.6 (14.6)79.4 (3,3)18.0 (10,5)57.1

a) IV = 0. 51

TABLE II - EXAMPLES VI - XXIX (cont'd) EFFECT OF OLEFINIC IMPACT MODIFIERS ONLY

Composition Example Example Example Example Example (parts by weight) XXI XXII XXIII XXIV XXV

Poly

(BPA Carbonate)a/b 100 100 100 100 100

Impact Modifier MICROTHEN MICROTHENE S ⁾ PROFA: PROFA:

Type FE 532 FE 532 6801 6801

Amount 2 4 3.5 4.3

Properties

Melt Flow Rate H (Gr./lO min.) 11.3 12.1 13.5 18.3 22.0 I

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), kg-cm/cm (14.7)80.0 (12.9)70.2 (9.3)50.6

Notched Izod (1/4")0.64 cm (FT-lb/in.) kg-cm/cm (3.2)17.4 (11.8)64.2 (2.0)10.9 (9.6)52.2 (9.6)52.2

TABLE II - EXAMPLES VI- XXIX (cont 'd)

EFFECT OF OLEFINIC IMPACT MODIFIERS ONLY

Composition Example Example Example Example (parts by weight) XXVI XXVII XXVIII XXIX

Poly

(BPA Carbonate) 100 100 100 100 Impact Modifier PROFAX^ DEXON ® ⁴ ^ DEXO ^ DEXO ^™ Q

Type 6601. 1004 1004 1004

Amount 4.3 2 4 6

Properties 00

I

Melt Flow Rate (Gr./lO min.) 17.4 16.7 18.0 19.3

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), kg-cm/cm (12.7)69.1 (14.0)76.2 (13.2)71.8 (12.7)69.1

Notched Izod (1/4") 0.64 cm (Ft-lb/in.) kg-cm/cm (10.0)54.4 (2.6)14.1 (9.6)52.2 (9.1)49.5

-19-

Examples XXX XXXIX

Various blends of a bisphenol-A polycarbonate having an IV of 0.51 in admixture with various olefinic impact modifying agents in varying amounts together with varying .amounts of KODA LEX^NP-10 were prepared, extruded and molded into sample parts of 0.32 cm Cl/8 inch) and 0,64 cm Cl/4 inch) thickness in the same manner as was done in previous examples. The results of melt flow rate and notched Izod impact tests performed on these materials are set forth in Table III.

Examples XL - XL V Various blends of a bisphenol-A polycarbonate having an IV of 0.46 in admixture with various olefinic impact modifying agents in varying amounts together with varying amounts of KODAFLEX-^ NP-10 as set forth in Table II were prepared, extruded and molded into sample parts of 0.32 cm Cl/8 inch) and 0.64 cm Ci/4 inch) thickness in the same manner as was done in the previous examples. The results of melt flow rate and notched Izod impact tests performed on these materials are also set forth in Table III.

^" BURE4

TABLE III - EXAMPLES XXX - XXLIV EFFECT OF PLASTICIZER IN COMBINATION WITH OLEFINIC IMPACT MODIFIERS

Composition Example Example Example Example Example (parts by weight) XXX XXXI XXXII XXXIII XXXIV

Poly. (BPA Carbonate ) ^{a '} 100 100_ ¹⁰ 9^ 100 100

Impact Modifier PROFA PROFAX^ PROFAX^ PROFA > PROFA:

Type 6601 6701 6801 6601 6801

Amount 3 3 3 4.3 2

KODAFLEX^ NO-10 3 3 3 2 2

I

Properties o

Melt Flow Rate (Gr./lO min.) 17.8 17.5 21.4 21.4 14.1

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), .kg-cm/cm (11.7)63.6 (9.9)53.9 (2.5)13.6 (11.2)60.9 (14.0)76.2

Notched Izod (1/4") 0.64 cm (Ft-lb/in.) kg-cm/cm (3.1)16.9 (2.9)15.8 (3.0)16.3 (9.0)49.0 (2.0)10.9

TABLE III - EXAMPLES XXX - XLIV (cont'd) EFFECT OF PLASTICIZER IN COMBINATION WΪTH OLEFINIC IMPACT MODIFIERS

Composition Example Example Example Example Example (parts by weight) XXXV XXXVI XXXVII XXXVIII XXXIX

Poly.

(BPA Carbonate) ³ 100 100 _ 100 _/ -r 100 _ Impact Modifier PROFA:® PROF. PROFA: usi® Type 6801 6801 6801 LB 703 1004 - Amount 3 4 4 3 4.3

KODAFLEX NP-10 2 2 3 3 2

Properties 1 to

Melt Flow Rate . H 1 (Gr./lO min.) 15.5 15.1 16.2 13.7 25.0

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), .kg-cm/cm (12.7)69.1 (13.3)72.4 (11.3)61.5 (12.8)69.6 (9.9)53.9

Notched Izod (1/4")0.64 cm (FT-lb/in.) kg-cm/cm (3.5)19.0 (9.6)52.2 (10.5)57.1 (3.6)19.6 (4.6)25.0

TABLE III - EXAMPLES XXX - XLIV (cont'd)

_ EFFECT OF PLASTICIZER IN COMBINATION WITH OLEFINIC IMPACT MODIFIERS

Composition Example Example Example Example Example (parts by weight) XL XLI XLII XLI11 XLIV

Type 6601 6601 6801 6801 1004

Amount 4.3 4.3 4.3 4.3 4

KODAFLEX NP-10 1 2 1 2 , 1 1 to

Properties _* t 1

Melt Flow Rate (Gr./lO min.) 17.5 19.4 18.9 22.2 21.5

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), . kg-cm/cm (12.7)69.1 (12.0)65.3 (9.3)50.6 (6.9)37.5 (12.0)65.3

Notched Izod

# (1/4") 0.64 cm (Ft-lb/in.) kg-cm/cm (9.8)53.3 (9.7)52.8 (9.6)52.2 (6.0)32.6 (8.7)47.3

-23-

Examples XLV - XLVXII

^' Various blends of bisphenol-A polycarbonate having an IV of 0.51 along with 5 parts by weight of various acrylic rubber modifying agents as set forth in Table IV were prepared, extruded and molded into sample parts of 0,32 cm Cl/8 inch) and 0.64 cm

(1/4 inch) thickness in the same manner as was done in previous examples. The results of melt flow rate and notched Izod impact tests on these materials is also set forth in Table IV,

TABLE IV - EXAMPLES XLV - XLVIII EFFECT OF ACRYLIC RUBBER IMPACT MODIFIERS ONLY

Composition Example Example Example Example (parts by weight) XLV XLVI XLVII XLVIII

Poly (BPA Carbonate) ³ 95 95 95 95

Impact Modifier BLENDE BLENDE ACRYLOID ® ACRYLOI

Type HIS 111N KM611 KM611

Amount 5 5 5 5

Properties I t

Melt Flow Rate I (Gr./lO min.) 11.1 10.4 10.5 9. 9

Notched Izod (1/8-) 0.32 cm; (Ft-lb/in.), kg-cm/cm (13.3)72.4 (13.5)73.4 (12.6)68.5 (11. 9) 64. 7

Notched Izod

-25-

Exa ples XLIX - LII Various blends of a bisphenol-A polycarbonate having an IV of 0,51 in admixture with 5 parts by weight of various acrylic rubber impact modifying agents as set forth in Table V and 5 parts by weight of KODAFLEX ¹ ^ NP-10 were prepared, extruded and molded into sample parts of 0.32 cm Cl/8 inch) and 0,64 cm Cl/4 inch) thickness in the same manner as was done in previous examples. The results of melt flow rate and notched Izod impact tests performed on these materials are also set forth in Table V.

Examples LIII - LXV Various blends of bisphenol-A polycarbonate having an IV of 0,46 in admixture with various acrylic rubber impact modifying agents in various amounts together with varying amounts of

KODAFLEX-' NP-10 as set forth in Table V were prepared, extruded and molded into sample parts of 0,32 cm C1.8 inch) and 0.64 cm Cl/4 inch) thickness in the same manner as was done in previous examples. Q The results of melt flow rate and notched Izod impact tests performed on these materials are also set forth in Tbale V,

TABLE V - EXAMPLES XLIV - LXV

EFFECT OF PLASTICIZER IN COMBINATION WITH ACRYLIC RUBBER IMPACT MODIFIERS

Composition Example Example Example Example (parts by weight) XLIX L LI LII

Poly

Type KM611 436 111S 111N

Amount 5 5 5 5

KODAFLEX NP-10 5 5 5 5

Properties • I to

Melt Flow Rate (Gr./lO min.) 18.4 19.5 24.7 18.5

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), kg-cm/cm (12.3)66.9 (11.2)60.9 (12.2)66.4 (12.6)68.5

Notched Izod (1/4")0.64 cm (Ft-lb/in.) kg-cm/cm (2.4)13.1 (2.7)14.7 (3.4)18.5 (3.4)18.5

TABLE V - EXAMPLES XLIX - LXV

EFFECT OF PLASTICIZER IN COMBINATION WITH ACRYLIC RUBBER IMPACT MODIFIERS

Composition Example Example Example Example Example (parts by weight) LIII LIV LV LVI LVII

Poly.

(BPA Carbonate) 95 90 95 90 95

R R R R R

Impact Modifier ^• BLENDEX BLENDEX BLENDEX. BLENDEX BLENDEX

Type lϊlS HIS 436 ^' 436 111N

Amount 5 10 5 10 5

KODAFLEX ^R NP-10 2 2 2 2 2 1 to

Properties 1

Melt Flow Rate (Gr./lO min.) 17.1 15.7 19.6 14.5 20.2

Notched Izod (1/8") 0.32 cm; (Ft-lb/in. ) , kg-cm/cm (11.9)64.7 (10.7)58.2 (11.3)61.5 (11.3)61.5 (11.3)61.5

Notched Izod (1/4")0.64 cm (Ft-lb/in.) kg-cm/cm (9.2)50.0 (9.3)50.6 (3.0)16.3 (9.5)51.7 (4.8)26.1

TABLE V - EXAMPLES XLIX - LXV

. EFFECT OF PLASTICIZER IN COMBINATION WITH ACRYLIC RUBBER IMPACT MODIFIERS

Composition Example Example Example Example (parts by weight) LVI11 LIX LX LXI

Poly. _b (BPA Carbonate) 90 95 90 92

R R R R

Impact Modifier • BLENDEX ACRYLOID ACRYLOID ACRYLOID

Type 111N KM611 KM611 KM611

Amount 10 5 10 5

KODAFLEX NP-10 2 2 2 3 I t

Properties oo

I

Melt Flow Rate (Gr./lO min.) 18.9 15.7 16.1 19.3

Notched Izod (1/8") 0.32 cm; (Ft-lb/in.), .kg-cm/cm (10.9)59.3 (12.0)65.3 (11.9)64.7 (11.3)61.5

Notched Izod (1/4") 0.64 cm (Ft-lb/in.) kg-cm/cm (8.8)47.9 (8.8)47.9 (10.8)58.8

TABLE V - EXAMPLES XLIX - LXV

EFFECT OF PLASTICIZER IN COMBINATION WITH ACRYLIC RUBBER IMPACT MODIFIERS

Composition Example Example Example Example (parts by weight) LXII LXIII LXIV LXV

Poly- . (BPA Carbonate) 92 92 92 92

R R R R

Impact Modifier " BLENDEX BLENDEX BLENDEX BLENDEX

Type HIS 111N HIS HIS

Amount 5 5 5 5

KODAFLEX ^R NP-10 3 3 3 3

Properties I to O

Melt Flow Rate I

(Gr./lO in.) 22.8 22.7. 22.3 20.6

Notched Izod

(1/8") 0.32 cm; (Ft-lb/in.), kg-cm/cm (11.3)61.5 (11.3)61.5 (11.3)61.5 (12.0)65.3

b) IV = 0,46

. -30-

Although the above examples show various modifications of the present invention, other variations are possible in light of the above teachings,

It is, therefore, to be understood that ^• changes may be made in the particular embodiment of the invention described which are within the full intended scope of the invention, as defined by the . appended claims.