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Patent Searching and Data


Matches 401 - 450 out of 4,067

Document Document Title
WO/1994/020555A1
A process is described for making highly crosslinked polyvinylpyrrolidone (PVP) polymer by popcorn polymerization having a swell volume of less than about 65 ml/10 g, preferably 40-65 ml/10 g, in the absence of added crosslinking agent, ...  
WO/1994/020549A1
Described is a method of preparing polyvinyl pyridine-N-oxides by the oxidation of polyvinyl pyridines with aqueous solutions of hydrogen peroxide in the presence, as a catalyst, of acids and oxides or acids of elements of groups 5b, 6b,...  
WO/1994/018253A1
Novel fluorosiloxane-containing monomers are disclosed which are especially useful for the preparation of biomedical materials such as contact lenses.  
WO/1994/018241A1
A free radical solution process for making PVP polymers having a molecular weight corresponding to a K-value of about 30-150, a narrow molecular weight distribution represented by a polydispersity of about 3 to 6, and a residual VP monom...  
WO/1994/016749A1
The present invention provides materials which comprise a surface having pendant zwitterionic groups Z comprising, as anion, a phosphate, sulphonate, carboxylate or phosphate-ester group or a phosphate ester group in which one or more of...  
WO/1994/013712A1
The monomer is characterized by the general formula (1) [(R1)(R2)C = C(R3)-CO-L-]q A(NCObloc)p wherein R1, R2 and R3 similar or different, represent a hydrogen or a group selected among the hydrocarbon chains having from 1 to 12 carbon a...  
WO/1994/013669A1
The invention relates to a method for the preparation of a bisnadimide of formula (II) substantially free of oligomeric, amidic and uncyclized impurities wherein: Ar is an optionally substituted aryl, optionally substituted bridged or bo...  
WO/1994/013882A1
Described is the use, as additives to paper-making pulp, of copolymers obtained by polymerizing a) 5 to 99 mole % of N-vinyl carboxylic acid amides, b) 95 to 1 mole % of monoethylenically unsaturated carboxylic acids and/or alkali-metal,...  
WO/1994/011403A1
Artificial antibodies or antibody mimics are described. They consist of polymers that carry specific binding sites mimicking the properties of antibodies. There is also described a method for producing artificial antibodies, in which pol...  
WO/1994/010281A1
Copolymers may be produced by radical-initiated copolymerisation of monomer mixtures composed of (a) 60 to 99 % by weight 1-vinylpyrrolidone, 1-vinylimidazole or their mixtures; (b) 1 to 40 % by weight nitrogenated, basic, ethylenically ...  
WO/1994/007686A1
Optically transparent, high refractive index hydrogels are provided. Expansile hydrogel intraocular lenses (10) are fabricated from the hydrogels by heating them above their elastic deformation temperatures and deforming them into an elo...  
WO/1994/005423A1
A carbonylation catalyst useful for the carbonylation of methanol to acetic acid, acetic anhydride or both comprises a polymer support containing pendant pyrrolidone groups which support a rhodium species. Other polymeric supports capabl...  
WO/1994/001474A1
A polymerizable monomer represented by general formula (1), a polymer thereof, a process for producing the same, and the use of the polymer, wherein R1 represents hydrogen, methyl, chloro or cyano; R2 represents C1-C4 alkylene; R3 repres...  
WO/1994/001477A1
Polymers consist of (a) 1-50 % weight of one or several unsaturated, polymerisable carboxylic acids having the formula (I), in which R1 stands for hydrogen, C1-C4 alkyl or COOM, R2 stands for hydrogen or C1-C4 alkyl, R3 stands for hydrog...  
WO/1994/000520A1
The present invention relates to aqueous liquid for primers which contain a copolymer mainly formed with a cationic monomer, an alkoxysilane monomer and an ethylenic unsaturated monomer in aqueous medium, wherein low viscosity and superi...  
WO/1993/025594A1
Supports having azlactone-functional surfaces, adduct supports prepared from such azlactone-functional supports, and methods of preparing both are disclosed. Azlactone functionality is introduced to surfaces of a pre-existing support in ...  
WO/1993/022665A1
A capillary tube with a charged inner surface for use in capillary electrophoresis and methods. The tube is filled with an electrolyte solution containing 0.05-30 % weight/weight of a hydrophilic polymer which is characterized by (A) a m...  
WO/1993/018072A1
Inherently tacky pressure-sensitive acrylic polymers are formed by emulsion polymerization in the presence of at least one reactive multifunctional monomer having a cyanurate or phosphate functionality.  
WO/1993/018073A1
A process for producing copolymers from monoethylenically unsaturated monomers containing acid groups and from N-vinyl lactames and possibly from other monoethylenically unsaturated monomers by copolymerising the monomers in the presence...  
WO/1993/013150A1
Polymerisable resins which comprise a porphyrinogenic ring system obtained by the reaction of: a) one or more compounds selected from the group consisting of pyrrole and N-(lower)alkyl pyrroles, any of which may be optionally substituted...  
WO/1993/010201A1
A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) ...  
WO/1993/009084A1
A novel class of compounds are disclosed which may be used as novel crosslinking agents for acrylic-containing, vinyl-containing and/or styrene-containing hydrophilic monomers to prepare novel UV-curable hydrophilic copolymers suitable f...  
WO/1993/009154A1
Improved silicone-containing hydrogels are disclosed with enhanced wettability comprising a silicone-containing monomer, at least one acrylic-containing hydrophilic monomer, and at least one vinyl-containing hydrophilic monomer.  
WO/1993/007190A1
The present invention concerns an acrylate copolymerisate containing amino, carboxyl and optionally hydroxyl groups characterized in that an acrylate copolymerisate containing an amino group and optionally a carboxyl group is produced A)...  
WO/1993/003077A1
Hydrogel provided as tablets capable of regulating without dissolving, any pH of an aqueous solution, to finally convert the pH to 7. These tablets may be removed from the solution at any time without modifiying the pH and they may be re...  
WO/1992/017509A1
What is provided herein is a precipitation polymerization process wherein homopolymers, copolymers and polymer mixtures with comonomers are produced in an advantageous manner, preferably as fine powders, at a high solids level, in high y...  
WO/1992/013898A1
What is provided herein is a process for making homopolymers of polyvinylpyrrolidone polymer in the form of fine powders at a polymer solids level of at least about 17 %, preferably 30 % or more, and in a yield of at least about 95 %, wh...  
WO/1992/013569A1
The structure and the manner of manufacture of polymeric conjugates of cyclosporin, characterized in that they as polymeric carriers contain 40-700 polymerized monomeric units composed from 20-99 % mol. biologically inert hydrophilic uni...  
WO/1992/011300A1
An improved soft contact lens material, existing as a hydrogel, is formed by a polymer containing a fluorinated monomer, a hydroxyalkyl ester of acrylic or methacrylic acid, and an N-vinyl lactam. The polymer may also contain other hydro...  
WO/1992/007885A1
Cross-linked copolymers which are obtainable by polymerising a neutral diluent monomer or monomers, a monomer or monomers bearing a centre of permanent positive charge, and a bifunctional and/or trifunctional cross-linking agent, are sui...  
WO/1992/007879A1
Biologically active material covalently immobilized to azlactone-functional polymeric supports in the presence of polyanionic salt and azlactone quencher is provided. The biologically active material is immobilized rapidly and achieves b...  
WO/1992/007012A1
This invention provides novel azlactone-functional oligomers of 2-alkenyl azlactones in which oligomerization has occurred predominantly via the 2-alkenyl group. Oligomerization of the 2-alkenyl group provides oligomers having 2 to 15 me...  
WO/1992/002572A1
The present invention is directed to a radiation-curable liquid composition that includes an associative ethylenically unsaturated reactive blend, a resinous poly-(meth)acrylate oligomer and optionally an inert thermoplastic material. Th...  
WO/1992/001008A1
The invention concerns a method for the preparation of water-swellable products, using very fine particles of water-swellable polymers, characterized by the following steps: (a) very fine particles of water-swellable polymer are disperse...  
WO/1992/001007A1
Polymerisable materials produced by the reaction of a pyrrole and an unsaturated or polymerisable aldehyde, preferably a beta-unsaturated aldehyde. Polymers made from the above-described polymerisable material and copolymers formed from ...  
WO/1991/018929A1
What is described herein is an improved precipitation polymerization process and copolymer products produced thereby. The process herein is carried out by charging a reactor with a solvent in which the copolymer product is substantially ...  
WO/1991/018303A1
The present invention relates to a method for fabricating an optical lens with refraction index modulation, characterized in that, starting from a transparent hydrophilic polymer lens of the hydrogel type, previously shaped, said lens is...  
WO1991015526A3  
WO/1991/016057A1
Colonic-targeted oral drug dosage forms composed of a drug confined within a crosslinked hydrogel that exhibits pH-dependent swelling and is composed of an ionizable comonomer such as acrylic acid, a nonionizable comonomer such as an acr...  
WO/1991/015947A1
What is provided herein is a method for preparing a product which comprises discrete microdroplets of an oil in water stabilized by in situ polymerization of a water-soluble vinyl monomer. The method comprises dispersing the oil in water...  
WO/1991/015526A2
The invention provides acrylamide polymers that, when mixed with water solvent, provide thermoreversible solutions that form low viscosity melts at temperatures separated by a third region of maximum viscosity.  
WO/1991/015522A1
An uncrosslinked, water-soluble polyvinylpyrrolidone having a K-value in excess of 120 and containing less than about 0.1 percent by weight of residual monomer. A method for preparing the high molecular weight polyvinylpyrrolidone is als...  
WO/1991/015527A1
The present invention relates to novel copolymers and contact lenses made from these copolymers comprising preformed silicone-containing acrylic star polymers and macromonomers, preparation of these contact lenses and a therapeutic metho...  
WO/1991/013919A1
This invention relates to a radiation-curable monoethylenically unsaturated liquid non-aqueous composition whereby the composition comprises an ionomeric composition comprising a monoethylenically unsaturated acid wherein at least a port...  
WO1991009067A3  
WO1991009061A3  
WO/1991/009888A1
The invention relates to copolymers with an average content of 1.25 to 30 functional groups per molecule and an average molecular weight of from 1500 to 6000 which can be produced by radical solution polymerisation at 130 to 200 �C fro...  
WO/1991/009067A2
Water-soluble, amphoteric grinding and/or dispersion agent for aqueous mineral suspensions with the formula (I) having the general form: -(A)p-(B)q-(C)r, where (A) is an anionic ethylene monomer with carboxylic function, (B) is a non-ion...  
WO/1991/009061A2
High-temperature oil-resistant elastomers are prepared from butadiene alkenylpyridine copolymers, butadiene-acrylate copolymers, and copolymers of butadiene with 1,3-dienes containing fluorine. The unsaturated olefinic backbone and penda...  
WO/1991/007449A1
Polymers comprising recurring units represented by structures (1), (2) and (3), where R?1¿, R?2¿, D, J, Y, a, b, and c are as defined herein are useful for controlling wandering of filter dyes in photographic elements.  

Matches 401 - 450 out of 4,067