Abstract: An interpenetrating network polymer is obtained by mixing hydrophilic monomer vinyl pyrrolidone and hydrophobic monomer (5-alkylene-m-dioxanyl) acrylic ester in the presence of at least two crosslinking agents and, optionally, hydroxyalkyl acrylic ester and catalysts and causing polymerization to occur. Contact lenses made from the polymer have high tensile strength and can absorb a high degree of water.

Abstract: A method for removing trace amounts of contaminating hydrazine from pharmaceutical grade PVP. An aqueous solution of PVP is contacted with a gaseous stream containing ozone for a period of time sufficient to remove the hydrazine.

Abstract: N-chlorolactams, -amides, and -carbamates are photolyzed in alcoholic solution to provide N-(alpha-alkoxyalkyl)-substituted derivatives. These derivatives are interacted with hydroxylated acrylate or methacrylate esters to yield monomers which may be polymerized in the presence of an appropriate initiator. Many of the monomers are water soluble and are useful to prepare polymeric films having unique properties.

Abstract: A copolymer comprising,(a) a hydrophilic siloxanylalkyl ester having a structure in which a siloxane part (1) having a terminal acryloyl or methacryloyl group and a siloxane part (2) having a terminal hydrophilic group are bonded through an alkylene chain with each other,(b) a hydrophilic monomer, and(c) a hydrophobic monomeris suitable for use in the production of a soft contact lens having a high oxygen permeability and an excellent affinity for the eye tissue which can be worn continuously for a long period of time.

Abstract: The polymeric sunscreen agents of the present invention comprise interpolymers of(a) an olefinic p-aminobenzoate devoid of hydroxy substitution;(b) N-vinylpyrrolidone;(c) a monomer selected from the group consisting of a vinyl lactam having a number average molecular weight of at least 125, an acrylate or methacrylate or any mixture thereof and optionally(d) acrylic or methacrylic acid.

Abstract: Crosslinked, water-swellable copolymers are produced with a crosslinking agent comprising an N-(2'alkenyl)-3-methylenepyrrolidin-2-one of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each is hydrogen or alkyl having 1 to 6 carbon atoms.

Abstract: The present invention relates to a polymeric hair conditioning composition of vinyl pyrrolidone monomer, an ammonium derivative monomer and a substantially major amount, based on said monomers, of vinyl caprolactam said polymeric composition optionally containing a minor amount of stearyl methacrylate. Suitable ammonium derivative monomers include dimethylamino propyl methacrylamide, dimethyl diallyl ammonium chloride and a dialkylamino alkyl methacrylate, such as for example dimethylamino ethyl methacrylate.

Abstract: Vinylpyrrolidone is polymerized using free radical initiator consisting essentially of t-Butylperoxypivalate and preferably in solvent consisting essentially of water, isopropyl alcohol, sec. butyl alcohol or mixtures thereof.

Abstract: Vinylpyrrolidone and vinyl acetate monomers are polymerized using free radical initiator consisting of t-Butylperoxypivalate and preferably in solvent consisting essentially of water, isopropyl alcohol, sec. butyl alcohol or mixtures thereof to produce vinyl pyrrolidone/vinyl acetate copolymer.

Abstract: Flexible thermoplastic vinyl chloride polymers are prepared by graft or over copolymerizing said polymers with a mixture of certain acrylates and nitriles or by blending said vinyl chloride polymer with a terpolymer of certain acrylates and nitriles.

Abstract: Formulations containing pigments and/or delustrants, a solution of a pigment binder and, if appropriate, additives, characterized in that the pigment binder is a copolymer of, relative to the weight of the copolymer,10-40% by weight of an acrylic acid ester having 1-12 C atoms in the alcohol chain,10-40% by weight of a methacrylic acid ester having 1-4 C atoms in the alcohol chain,10-30% by weight of N-vinylpyrrolidone,5-15% by weight of acrylic acid and10-20% by weight of a vinyl ester having 1-4 C atoms in the acid chain,which have been prepared in an organic solvent which is miscible with water in the presence of a regulator and of a per-compound or an azo compound which donates free radicals at the polymerization temperature, and the use of these formulations for pigmenting and/or delustring dressing agents for leather and leather imitations.

Abstract: The present invention comprises a water vapor permeable, pressure-sensitive adhesive composition useful for surgical and medical bandage applications, and incorporating modified copolymers of butyl acrylate containing N-vinyl 2-pyrrolidone and acrylic acid. The present pressure-sensitive adhesive composition results in enhanced water vapor transmission rates, which may lead to a concomittant reduction in skin lesions that were previously attendant upon the accumulation of water under conventional inadequately permeable pressure-sensitive adhesive-coated surgical and medical dressings.

Abstract: Novel water-soluble terpolymers comprising:______________________________________ Ingredients Mole % ______________________________________ 2-acrylamido-2-methylpropane- 58-77 sulfonic acid, sodium salt (AMPS) N--vinylpyrrolidone 2-20 acrylonitrile 4-36 ______________________________________These terpolymers provide high temperature fluid loss additives and rheology stabilizers for high calcium-containing brine clay drilling fluids.

Abstract: A release agent comprising (A) a polymer of at least one vinyl monomer of the general formulaCH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n CONHR (I)wherein R.sub.1 and R.sub.2, independently from each other, represent hydrogen or a methyl group, R represents an alkyl group having at least 12 carbon atoms or a fluoroalkyl group having at least 6 carbon atoms, and n is an integer of from 1 to 6,(B) a copolymer of at least one vinyl monomer of general formula (I) above and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B); and a product prepared by coating the said release agent on a non-adhesive surface of an adhesive article having an adhesive surface and the non-adhesive surface or on the surface of a release paper.

Abstract: Flexible thermoplastic vinyl chloride polymers are prepared by graft or over copolymerizing said polymers with a mixture of certain acrylates and nitriles or by blending said vinyl chloride polymer with a terpolymer of certain acrylates and nitriles.

Abstract: A room temperature curing elastic composition useful as a sealing material which comprises as a main component a polymer produced from(a) at least one acrylic ester monomer of the formula:CH.sub.2 .dbd.CHCOOR.sub.1wherein R.sub.1 is an alkyl having 2 to 8 carbon atoms;(b) at least one member selected from the group consisting of vinylalkoxysilane of the formula: ##STR1## wherein R.sub.2 is an alkyl having 1 to 4 carbon atoms, X is methoxy or ethoxy, and a is 0, 1 or 2; and a (meth)acryloxyalkoxysilane of the formula: ##STR2## wherein R.sub.3 is hydrogen or methyl, R.sub.4 is a divalent hydrocarbon group, R.sub.5 is an alkyl having 1 to 4 carbon atoms, Y is methoxy or ethoxy, and b is 0, 1 or 2; and(c) a chain transfer agent having a mercapto group.

Abstract: A soft contact lens having in preferred embodiment an elliptical inside surface which has a numerical eccentricity of 0.2 to 0.5 and a zenith radium of curvature of 8.0 to 8.4 mm. It preferably consists of a copolymer comprising of 50% to 90% hydroxyethyl-methacrylate (HEMA) by weight, 2% to 20% one or more unsaturated carboxylic acids, 2% to 20% one or more base monomers, 5% to 25% aliphatic acrylate or methacrylate, and 0.1% to 1% of a dialkylene-glycol-dimethacrylate crosslinker.

Abstract: The invention relates to hot-melt pressure-sensitive adhesive compositions having a novel combination of properties. More specifically, the invention relates to polymerized terpolymer compositions containing n-butyl acrylate, N-vinyl-2-pyrrolidinone and styrene which provide pressure-sensitive adhesives. These terpolymer hot-melt pressure-sensitive adhesive compositions have good peel adhesion, excellent shear adhesion and permanent tack.

Abstract: Low N-vinyl lactam content copolymers are cross-linked with resonance free di(alkene tertiary amine) cyclic compounds to obtain biomedical devices, including soft contact lenses, which have good oxygen permeability and mechanical properties.

Abstract: N-vinyl lactam monomers and comonomers are cross-linked with resonance free di(alkene tertiary amine) cyclic compounds to obtain biomedical devices, including contact lenses, which have high oxygen permeability and good mechanical properties.

Abstract: Polymeric materials suitable for biomedical applications, particularly in making contact lenses, are formed by copolymerization and crosslinking of: (1) an amide of an unsaturated carboxylic acid such as acrylamide or methacrylamide; (2) an N-vinyl lactam such as N-vinyl pyrrolidone; (3) an ester of an unsaturated carboxylic acid such as a hydroxy-substituted ester of acrylic or methacrylic acid; (4) an unsaturated carboxylic acid such as acrylic or methacrylic acid; and (5) a hydrophobic monomer component comprising: (a) a fluorine-containing polymerizable monomer having a fluoroaliphatic side chain, such as fluoroalkyl acrylate or methacrylate, and (b) a non-fluorine-containing polymerizable hydrophobic vinyl monomer such as styrene; crosslinking with a crosslinking agent either being carried out during copolymerization or subsequently.

Abstract: A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.

Abstract: Polymeric materials suitable for bio-medical applications, particularly in making contact lenses, are formed by copolymerization and crosslinking of: (1) an amide of an unsaturated carboxylic acid such as acrylamide or methacrylamide; (2) an N-vinyl lactam, such as N-vinyl pyrrolidone; (3) an ester of an unsaturated carboxylic acid, such as a hydroxy-substituted ester of acrylic or methacrylic acid; (4) an unsaturated carboxylic acid, such as acrylic or methacrylic acid; and (5) a polymerizable hydrophobic vinyl monomer, such as styrene; crosslinking with a crosslinking agent either being carried out during copolymerization or subsequently. The resulting polymeric materials may be machined to produce a contact lens form and then hydrated to form a hydrogel which is suitable for use as an extended wear contact lens.

Abstract: An oxygen permeable contact lens fabricated from a copolymer of a multifunctional siloxanyl alkylester a monomer selected from the group consisting of, an ester of acrylic or methacrylic acid and from an ester of itaconic acid or mixture thereof. The copolymer can be made either hard, soft, or elasticmeric with improved oxygen permeability.

Abstract: Nonionic and anionic water-soluble addition copolymers of acrylamide and N-substituted acrylamides are useful as flow modifiers in and as adsorbates from aqueous systems, particularly multiphase systems. The copolymers have a weight average molecular weight greater than 30,000 and are useful for many purposes including as thickening agents or rheology modifiers for water based systems, block improvement additives in water based coating formulations, and transfer aids in water based ink or roll coater formulations.

Abstract: The invention provides new hydrogel forming materials comprising synthetic, hydrophilic, aqueous-insoluble polymer networks formed by copolymerization of a hydrophilic dihydroxyalkyl acrylate or methacrylate, a substantially water insoluble alkyl acrylate or methacrylate, one or more additional hydrophilic comonomers selected from the group of vinylic monomers, acrylates, and methacrylates, and a cross-linking agent. The hydrogels are preferably used for the formation of contact lenses, but may also be used for drug and pesticides delivery devices; dialysis, ultrafiltration and reverse osmosis membranes; implants in surgery and dentistry; and the like.

Abstract: Cross-linked hydrophilic polymers, useful inter alia for the manufacture of contact lenses capable of absorbing water to a water content of 63 to 90% by weight while retaining excellent tensile strength contain hydrophilic units of N-vinyl-2-pyrrolidone, with optionally other hydrophilic monomers in minor amount, hydrophobic units of cycloalkyl acrylate, methacrylate or itaconate, and optionally other hydrophobic monomers, and units of a cross-linking agent. They may be made by polymerizing the monomers in the presence of a free radical generating catalyst. The polymer may then be shaped and hydrated.

Abstract: Copolymers comprising acrylic ester units, dicarboxylic compounds units and diisobutylene units and whose average molecular weight by number is from 500 to 250,000 are useful for improving the cold-flow properties of lube oils and other hydrocarbon oils such as diesel oil, heavy fuel oil, residual fuel oil and crude petroleum.

Abstract: Monomeric polysiloxanes endcapped with activated unsaturated groups are copolymerized with polycyclic modulus modifiers and tear film stabilizers to form hard, gas permeable, polysiloxane contact lenses and other biomedical devices.

Abstract: A method for coating various surfaces is disclosed, which comprises the step of preparing a mixture composed by at least one compound such as an epoxy-acrylic resin, a polyester alpha-omega-acrylate resin, an unsaturated polyester resin, or a urethane-acrylate resin and by at least one unsaturated compound of the amide, lactam, piperidone and urea classes and using said mixture for compounding a varnish to be applied to the selected substrate and then irradiated with an appropriate radiation (range 200 to 400 nm wavelength).

Abstract: A new composition of matter specially adapted for the production of contact lenses, artificial eyes or other prosthetic devices. The composition has the characteristics of increased hydrophilicity, softness after hydration and oxygen permeability. The composition is a solid copolymer of comonomers consisting essentially of about 15 to about 65% by weight of one or more of the hydrophilic amide group containing monomers and about 10 to about 75% by weight of one or more of the polysiloxanylalkyl methacrylates or acrylates. Optionally, about 0.1 to about 65% by weight of at least one property modifier, a vinyl group containing monomer such as methyl methacrylate, can be employed into the copolymers. The inventive material is optionally transparent, translucent or opaque depending on the type, composition and relative content of the comonomers used. In general, the transparent composition is suitable for use in making contact lenses.

Abstract: Unsaturated compounds corresponding to the following formula: ##STR1## in which: R' represents a hydrogen atom or a methyl radical are provided as antioxidant monomers from which antioxidant polymers can be prepared.

Abstract: The invention relates to a process for the preparation of polymers from polymerizable urethanes prepared by reacting isocyanates having at least two isocyanato groups with polyesters of the formula ##STR1## wherein R is alkylene having from 2 to 10 carbon atoms, A is an ethylenically-unsaturated radical, and n is an integer of from 1 to 100.

Abstract: Hazy or frosty appearance of mixtures of polyester and cellulosic fibers when dyed with disperse dyes is suppressed by adding to the aqueous dye bath a small amount of low copolymer of acrylamide or the like with a water-soluble maleic or fumaric acid ester, and with or without an additional water-soluble vinyl compound, all as defined infra. The copolymer is normally a liquid miscible with water in all proportions at 10.degree. C. or below. Disperse dye is fixed to the polyester fibers by heating as in the Thermosol process. Dyes for the cellulosic fibers can also be included in the dye bath so that the cellulosic fibers are also dyed in the same treatment. Alternatively the cellulosic fibers can be separately dyed, preferably after the polyester fibers are dyed.

Abstract: A copolymer of N-vinyl pyrrolidone and a vinylic, allylic or methallylic ester of a cyclic .alpha.- or .beta.-carboxylic acid is employed as a cosmetic film forming resin in cosmetic compositions for the hair, including hair setting lotions and lacquers, hair rinses and shampoos.

Abstract: A composition comprising a radiation-curable polymer, said polymer being crosslinkable and having pendant ethylenically unsaturated peptide groups is disclosed. Such polymers are useful in the field of graphic arts.

Abstract: The invention relates to new monomers of a polysiloxanyl alkyl esters of acrylic and methacrylic acids and its copolymerization with alkyl esters of acrylic, methacrylic acids and/or itaconate esters to produce highly permeable contact lens material. The copolymer preferably includes a cross-linking agent and hydrophilic monomer. Contact lenses manufactured from the material are easily machined and polished into hard or semi-hard contact lenses having excellent dimensional stability.

Abstract: Cosmetic compositions for the hair and skin are described which are characterized in that they contain a polymer which comprises recurring units having the general formula: ##STR1## in which: k is 0 or 1, and l=1 if k=0, or l=0 if k=1,p=0 or 1 and the radicals R.sub.1 to R.sub.5 represent various specified organic radicals.

Abstract: The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation usually via casing and cement pack perforations a composition comprising an aqueous solution of a mineral acid having dissolved therein a small amount of a vinylpyrrolidone polymer or an alkoxylated vinylpyrrolidone polymer. The increase in the permeability and porosity of the formation achieved utilizing the method of invention results in a substantial improvement in hydrocarbon recovery. Optionally, the injected composition may be saturated with natural gas at the injection pressure. In another embodiment this invention relates to the oxyalkylated vinylpyrrolidone polymer compositions.

Abstract: A water-insoluble hydrophilic gel comprising: (A) about 30 to about 90% of a hydrophilic (a) polymer of identical or different watersoluble mono-olefinic monomers, or (b) copolymer of said watersoluble monomers with 1 to 70% of water-insoluble, identical or different mono-olefinic monomers, which polymer or copolymer is cross-linked with (B) about 10 to about 70% of a terminal diolefinic hydrophobic macromer having a molecular weight from about 400 to about 8000.

Abstract: Monomeric polysiloxanes end-capped with activated unsaturated groups polymerized with acrylic acid and a comonomer comprising a polycyclic ester of acrylic acid or methacrylic acid to form a hydrophilic, water absorbing contact lens is disclosed. These polysiloxane polymer contact lenses are unexpectedly capable upon hydration of retaining from 1 percent to about 99 percent by weight of water, based upon the total weight of the dry, i.e., unhydrated polymer.

Abstract: The invention provides new hydrogel forming materials comprising synthetic, hydrophilic, aqueous-insoluble polymer networks formed by copolymerization of a hydrophilic dihydroxyalkyl acrylate or methacrylate, a substantially water insoluble alkyl acrylate or methacrylate, one or more additional hydrophilic comonomers selected from the group of vinylic monomers, acrylates, and methacrylates, and a cross-linking agent. The hydrogels are preferably used for the formation of contact lenses, but may also be used for drug and pesticides delivery devices; dialysis, ultrafiltration and reverse osmosis membranes; implants in surgery and dentistry; and the like.

Abstract: Homopolymers and copolymers of compounds according to the formula; ##STR1## wherein R is an alkyl having 1 to 3 carbons, a+b+c+d=e, b=0 to e, c=0 to e, b+c>1, d=0 to 5, e=1 to 100, and Y is an organic group containing at least one >C=C< are hydrophilic as well as exhibiting properties similar to silicone compounds. The polymers are particularly useful in contact lenses having enhanced oxygen permeability.

Abstract: The binary suspension polymerization of a water soluble monomer and an organophilic or hydrophobic monomer having a low Tg in an integrated aqueous suspension system wherein the suspension medium for said organophilic monomer droplets comprises a hydrophilic monomer having a higher rate of reaction than the hydrophobic monomer and water in a mixture such that a solution of between about 1,000 and about 100,000 cps Brookfield viscosity is maintained in the reaction zone during polymerization of the organophilic droplets.

Abstract: Copolymers according to the invention contain a new crosslinking system based on carbonamide and/or N-methylol carbonamide groups in the copolymer, the crosslinked polymers containing the following structural units ##STR1## in which R represents a straight-chain or branched aliphatic hydrocarbon radical having 0 to 9 carbon atoms,R represents a hydrogen atom or a methyl radical, andR represents hydrogen or a --CH.sub.2 OH-- group and have molecular weights of between 10.sup.3 and 10.sup.6.The invention also relates to a process of making the copolymers, which have among other advantages a superior resistance to solvents. They are useful as coating compositions and the like.

Abstract: The invention relates to novel monomers of polysiloxanyl alkyl esters of acrylic and methacrylic acids and its copolymerization with alkyl esters of acrylic, methacrylic acids and/or itaconate esters to produce highly permeable contact lens material. The copolymer preferably includes a cross-linking agent and hydrophilic monomer. Contact lenses manufactured from the material are easily machined and polished into hard or semi-hard contact lenses having excellent dimensional stability.

Abstract: Cross-linkable vinyl ester and/or vinyl halide copolymers containing hydroxyl groups consisting essentially of:(a) from 50% to 99% by weight of monomer units selected from the group consisting of vinyl esters of alkanoic acids having from 1 to 18 carbon atoms, vinyl halides, and mixtures of said vinyl esters and vinyl halides,(b) from 0 to 40% by weight of mono-olefinically-unsaturated monomer units copolymerizable with vinyl esters and vinyl halide,(c) from 1% to 50% by weight of allyl ester monomer units of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen and alkyl having from 1 to 16 carbon atoms, and R.sub.3 is alkylene having from 1 to 16 carbon atoms, with the proviso that the total number of carbon atoms in R.sub.1, R.sub.2 and R.sub.3 is at least 2,where said copolymer has a K-value of between 10 and 100.

Abstract: This invention relates to an improvement in a liquid developer for the development of electrostatic charge images, comprising an electrically insulating carrier liquid in which pigments or dyestuffs, resinous binders, a polarity control agent, and conventional additives are dispersed or dissolved, the improvement that the polarity control agent is a copolymer which is soluble in the carrier liquid and is composed of 1 to 50 percent by weight of N-vinyl-2-pyrrolidone and 50 to 99 percent by weight of a methacrylic acid ester.

Abstract: A composition containing a therapeutically effective amount of powdered benzocaine suspended in an essentially anhydrous carrier and further containing a copolymer of a vinylpyrrolidone and an alpha-olefin as a crystal growth suppressing agent.

Abstract: Cross-linked hydrophilic interpolymers and contact lenses made therefrom comprising hydrophilic units of which the only or major proportion are derived from .Iadd.vinyl pyridine or .Iaddend.an N-vinyl heterocyclic monomer, hydrophobic units derived from the group consisting of styrene and ring-substituted styrenes, and cross-linking units derived from monmers containing two or more polymerizable double bonds per monomer unit.