Abstract: A stable, aqueous cationic hydrogel of, by weight, 1-50% of a crosslinked cationic copolymer of 5-95% vinylpyrrolidone (VP) and 5-95% 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomers, a crosslinking agent in an amount of 0.05-1% of said monomers, and water is described. The hydrogel has a pH of about 10 and a Brookfield viscosity of about 650 (Model DV-II+, RV spindle #3, speed 10 rpm); it can increase its viscosity by up to 40× at a pH of 3-9 and absorb up to 200× its weight of water. The hydrogel also can effectively condition hair even in the presence of an anionic surfactant.

Abstract: Free-flowing flakes of vinyl caprolactam monomer usable below its melting point of 34° C. without developing coloration.

Abstract: A stable, aqueous cationic hydrogel of, by weight, 1-50% of a crosslinked cationic copolymer of 5-95% vinylpyrrolidone (VP) and 5-95% 3-dimethylaminopropyl(meth)acrylamide (DMAPMA) monomers, a crosslinking agent in an amount of 0.05-1% of said monomers, and water is described. The hydrogel has a pH of about 10 and a Brookfield viscosity of about 650 (Model DV-II+, RV spindle #3, speed 10 rpm); it can increase its viscosity by up to 40× at a pH of 3-9 and absorb up to 200× its weight of water. The hydrogel also can effectively condition hair even in the presence of an anionic surfactant.

Abstract: What is described herein is a crosslinked polyvinylpyrrolidone (PVPP) copolymer of vinyl pyrrolidone (VP) and monomer derived from 1-vinyl-3-(E)-ethylidene pyrrolidone (EVP).

Abstract: What is described herein is a crosslinked polyvinylpyrrolidone (PVPP) copolymer of vinyl pyrrolidone (VP) and monomer derived from 1-vinyl-3-(E)-ethylidene pyrrolidone (EVP).

Abstract: Homogeneous copolymers of 60-99 mole % of vinyl pyrrolidone (VP) and 1-40 mole % 2-methylene-1,3-dioxepane (MDO), preferably 85-95 mole % VP and 5-10 mole % MDO, having a K-value of about 30-50, and a Tg of about 124-138.degree. C., are described herein. The copolymers are hydrolytically degradable in aqueous acid or basic solutions and biodegradable.

Abstract: A composition for preventing or retarding the formation of gas hydrates or for reducing the tendency of gas hydrates to agglomerate, during the transport of a fluid comprising water and a hydrocarbon, through a conduit, comprising, (a) a polymer or copolymer selected from a terpolymer of vinyl pyrrolidone, vinyl caprolactam and an ammonium derivative monomer having from 6 to 12 carbon atoms, selected from the group consisting of dialkyl aminoalkyl methacrylamide, dialkyl dialkenyl ammonium halide and a dialkylamino alkyl acrylate or methacrylate, a copolymer of vinyl pyrrolidone and vinyl caprolactam, and a homopolymer of vinyl caprolactam, and (b) a low molecular weight glycol ether containing an alkoxy group having at least 3 carbon atoms.

Abstract: This invention relates to a crosslinked N-vinyl lactam polymer in the form of a stable, clear, flowable homogenized hydrogel composed of microparticles which can be passed through a screen of between about 40 and about 350 mesh size. The invention also concerns a clear, colorless, hydrogel which is required as a carrier for a cosmetically or pharmaceutically active substance such as a hair or skin conditioner and cosmetic or pharmaceutical skin base.

Abstract: A process for making homogeneous copolymers of vinylpyrrolidone (VP) and 3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous solutions having high cloud points. The process involves precharging VP and DMAPMA monomers in a predetermined ratio, and then feeding VP and DMAPMA at a predetermined rate, the ratio of the components in the initial charge and the feeding rates for the monomer being selected in accordance with the reactivity rates of the monomers towards copolymerization as opposed to homopolymerization.

Abstract: A crosslinked PVP-I.sub.2 foam product, useful as an iodophor, contains about 0.1-2% crosslinker and about 16-18% total inorganic iodine.

Abstract: Strongly swellable, moderately crosslinked poly(vinyl pyrrolidone/vinyl acetate) copolymer (XL-PVP/VA) in the form of fine, white powders characterized by (a) an aqueous gel volume of about 15 to 150 ml/g of polymer, (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps, and (c) being prepared directly by precipitation polymerization of VP and VA monomers in the presence of a crosslinking agent in the amount of about 0.1 to about 2% by weight of VP and VA.

Abstract: A one-step for making a lightly-crosslinked polyvinylpyrrolidone hydrogel by polymerizing vinyl pyrrolidone in water in the presence of a suitable crosslinker such as 1-vinyl-3(E)-ethylidene pyrrolidone and a free radical initiator under initial agitation conditions sufficient to overcome the inertia of the polymer when formed.

Abstract: This invention relates to a crosslinked N-vinyl lactam polymer in the form of a stable, homogenized flowable hydrogel having microparticles which can be passed through a screen of between about 40 and about 350 mesh size. The invention also concerns the process for the preparation of the homogenized gel and to its use as a hair and skin conditioner or as a carrier for a cosmetically or pharmaceutically active substance.

Abstract: This invention relates to an N-vinyl heterocyclic copolymer in substantially pure deionized water or in aqueous alcoholic solution which exhibits significantly reduced color and odor and which is obtained by contacting an alcohol-copolymer mixture with water and a nitrogen containing, trivalent boron complex compound selected from the group of borane-ammonia, borane-lower alkylamine, tetra-lower alkyl ammonium octahydrotriborate, morpholine-borane, lower alkyl morpholine-borane, silylamino borane and mixtures thereof and stripping alcohol from the resulting mixture under vacuum at between about 100 and about 740 mm Hg below absolute whereby an aqueous, 10-70 wt. % solids solution of the copolymer is obtained having a water white color stability of more than a year.

Abstract: A polymerizable composition consisting essentially of about 50 to about 90% by weight of vinylpyrrolidone monomer, about 10 to about 50% by weight of vinyl caprolactam monomer, and about 0.5 to about 7% by weight of a crosslinker, which is capable of proliferous polymerization in the absence of base at about 80.degree.-120.degree. C.

Abstract: This invention relates to a process for the production of a substantially odorless, color stable N-vinyl heterocyclic copolymer in pure deionized water or in aqueous alcoholic solution which includes contacting an alcohol solution of the copolymer, under reduced pressure, at alcohol reflux temperature with water and a reducing agent selected from the group of a nitrogen containing borane complex, sulfurous acid and/or an alkali metal salt of sulfurous acid and recovering an aqueous, 10-80 wt. % solids solution of the copolymer having a substantially color free stability for a period of more than a year.

Abstract: A process is described for making substantially homogeneous copolymers comprising 50-90% of vinyl pyrrolidone (VP) and 10-50% of vinyl acetate (VA), by weight, which form clear aqueous solutions.

Abstract: This invention relates to a reactive diluent mixture employed in a free radical polymerization of film-forming monomers which comprises between about 25 and about 90 wt. % N-vinyl lactam containing 6 to 9 carbon atoms and between about 10 and about 75 wt. % of a non-cyclic vinyl amide having from 3 to 7 carbon atoms which is employed in a concentration of between about 10 and about 50 wt. % based on total film forming monomers.

Abstract: What is provided herein is a colorless, purified polymerizable composition useful for the production of crosslinked polyvinylpyrrolidone. The polymerizable composition includes about 74-96% by weight vinylpyrrolidone monomer and 4-26% by weight of the isomeric compound 1-vinyl-3(E)-ethylidene pyrrolidone as crosslinker. The polymerizable composition is used to make crosslinked polyvinylpyrrolidone rapidly upon heating the composition at about 80.degree.-120.degree. C. in the absence of base.

Abstract: This invention relates to a continuous film, coating, membrane or extruded filament of a crosslinked vinyl lactam polymer having excellent substrate adhesion, a glass transition temperature (Tg) above 150.degree. C. and water repellent properties. The invention also relates to the method of preparing and using filaments, coatings and membranes of said crosslinked polymeric product.