Lactam Monomer Patents (Class 526/264)
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Patent number: 4866148Abstract: The invention relates to new cross-linked copolymers of N-vinyl pyrrolidone, N-alkyl-N-vinyl carboxylic acid amides, methacrylates and optionally further copolymerizing monomers of a specific composition. the copolymers have a water absorption capacity of up to about 80% by weight, based on the hydrated state, and are suitable for the production of shaped articles which are in contact with living tissue in use. Examples include soft contact lenses and scleral lenses of high mechanical strength, in particular thin to very thin lenses for prolonged wear.Type: GrantFiled: May 7, 1987Date of Patent: September 12, 1989Assignee: Bayer AktiengesellschaftInventors: Otto-Christian Geyer, Frank Wingler
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Patent number: 4839109Abstract: A mixture of a specified siloxanylalkyl ester monomer and a specified vinyl monomer is polymerized by exposure to an ionizing radiation at low temperatures and the resulting polymer is worked with a lathe cut to form a contact lens. The contact lens obtained is free from any optical distortion, has good dimensional stability and exhibits high oxygen permeability. In a preferred embodiment, a monomer mixture comprising a siloxanylalkyl ester, a methacrylate or acrylate, N-vinylpyrrolidone, and a small amount of a dimethacrylate or diacrylate is exposed to a total dose of 1.times.10.sup.5 -5.times.10.sup.6 roentgens at a low temperature (-80.degree. C. to -20.degree. C. and at a dose rate of 8.times.10.sup.4 -2.times.10.sup.6 roentgens per hour, and the resulting polymer is worked into a contact lens by a suitable forming process involving cutting, grinding and polishing operations.Type: GrantFiled: July 16, 1986Date of Patent: June 13, 1989Assignees: Japan Atomic Energy Research Institute, Tokyo Contact Lens Research InstituteInventors: Isao Kaetsu, Minoru Kumakura, Hidenari Suyama, Nobuo Kameda, Hideo Koyama
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Patent number: 4833179Abstract: The present invention relates to a method for suspension polymerization of a pressure-sensitive acrylate copolymer bead having a glass transition temperature of 0.degree. C. or less. The method comprises making a monomer premix comprising an acrylic acid ester of non-tertiary alcohol, the alcohol having from 1 to 14 carbon atoms, with the average number of carbon atoms being about 4 to about 12, a polar monomer copolymerizable with the acrylic acid ester, a chain transfer agent, a free-radical initiator, and a modifier moiety selected from the group consisting of 2-polystyrylethyl methacrylate macromolecular monomers, reactive zinc salts and hydrophobic silicas. The premix is then combined with a water phase containing a sufficient amount of suspending agent to form a suspension. The suspension is concurrently agitated and polymerization of the polymer premix is permitted until polymer beads are formed. The polymer beads are then collected.Type: GrantFiled: October 2, 1987Date of Patent: May 23, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Chung I. Young, Rudyard M. Enanoza
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Patent number: 4829139Abstract: Permanently tacky pressure sensitive adhesives comprise terpolymers consisting essentially of 35-50% by weight of a vinyl ester of an alkanoic acid, 15-30% by weight ethylene and 35-50% by weight of di-2-ethylhexyl maleate or the corresponding fumarate.Type: GrantFiled: April 21, 1988Date of Patent: May 9, 1989Assignee: National Starch and Chemical CorporationInventor: Paul R. Mudge
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Patent number: 4826938Abstract: Permanently tacky pressure sensitive adhesives comprise terpolymers consisting essentially of 35-50% by weight of a vinyl ester of an alkanoic acid, 15-30% by weight ethylene and 35-50% by weight of di-2-ethylhexyl maleate or the corresponding fumarate.Type: GrantFiled: April 21, 1988Date of Patent: May 2, 1989Assignee: National Starch and Chemical CorporationInventor: Paul R. Mudge
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Patent number: 4822847Abstract: The present invention relates to homopolymers and copolymers of N-(4-sulfoalkyl)N-methyldiallyl ammonium betaines which are useful as aqueous viscosification agents.Type: GrantFiled: July 1, 1987Date of Patent: April 18, 1989Assignee: Exxon Research and Engineering CompanyInventors: Donald N. Schulz, Jeffrey J. Kaladas
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Patent number: 4816534Abstract: Hydrazine-free vinlypyrrolidone polymers which dissolve in water and organic solvents to give a clear solution are prepared by polymerization using di-tert-butyl peroxide in an aqueous medium.Type: GrantFiled: December 14, 1987Date of Patent: March 28, 1989Assignee: BASF AktiengesellschaftInventors: Adolf Nuber, Walter Denzinger, Axel Sanner
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Patent number: 4814101Abstract: New zwitterionic polymers are obtained as the copolymerization product of:from about 30 to about 70 mole % of monomers containing quaternary ammonium groups and corresponding to the following formula:R.sup.1 --CH.dbd.CR.sup.2 --CO--Z--(C.sub.n H.sub.2n)--N.sup.(+) (CH.sub.3).sub.3 ;about 10 to about 30 mole % of monomeric carboxylic acids corresponding to the following formula:R.sup.3 --CH.dbd.CR.sup.4 --COOH;about 10 to about 30 mole % of monomeric esters corresponding to the following formula:R.sup.5 --CH.dbd.CR.sup.6 --COOR.sup.7 ;and, optionally,0 to about 40 mole % of monomers containing tertiary amino groups and corresponding to the following formula:R.sup.8 --CH.dbd.CR.sup.9 --CO--Z--(C.sub.n H.sub.2n)--NR.sup.10 R.sup.11.The zwitterionic polymers are suitable for the production of hair-washing and hair-care preparations which have a long-lasting hair-softening effect.Type: GrantFiled: March 15, 1988Date of Patent: March 21, 1989Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Ludwig Schieferstein, Horst Hoeffkes, Kurt Seidel, Karl Giede, Peter Busch
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Patent number: 4814402Abstract: A contact lens material composed of a copolymer of a monomer mixture comprising, as essential monomers, from 5 to 20 parts by weight, based on 100 parts by weight of the total monomer mixture, of a hydrophilic monomer consisting of from 40 to 60 mol % of N-vinyl-2-pyrrolidone and from 40 to 60 mol % of metharylic acid and from 30 to 95 parts by weight, based on 100 parts by weight of the total monomer mixture, of at least one of a silicon-containing acrylate and a silicon-containing methacrylate.Type: GrantFiled: November 12, 1987Date of Patent: March 21, 1989Assignee: Menicon Co., Ltd.Inventors: Tatsutoshi Nakashima, Yoshitaka Taniyama, Akihisa Sugiyama
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Patent number: 4812547Abstract: Permanently tacky pressure sensitive adhesives comprise terpolymers consisting essentially of 35-50% by weight of a vinyl ester of an alkanoic acid, 15-30% by weight ethylene and 35-50% by weight of di-2-ethylhexyl maleate or di-n-octyl maleate or a corresponding fumerate.Type: GrantFiled: December 11, 1985Date of Patent: March 14, 1989Assignee: National Starch & Chemical Corp.Inventor: Paul R. Mudge
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Patent number: 4812541Abstract: Pressure-sensitive copolymers based on acrylic monomers are provided with high adhesive performance characteristics by the inclusion of a synergistic amount of an N-vinyl lactam monomer and a glycidyl monomer with the bulk of the monomers being an alkyl acrylate and/or methacrylate esters.Type: GrantFiled: December 23, 1987Date of Patent: March 14, 1989Assignee: Avery International CorporationInventors: Prakash Mallya, Colin Smith, Sebastian S. Plamthottam
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Patent number: 4806609Abstract: (1) Pyrrolidonyl acrylate block polymers having the formula ##STR1## wherein n has a value of 1 to 3; X and X' are dissimilar and each is hydrogen or methyl; y and z each have a value of from 1 to 40, except that at least one of y and z is greater than 1 and R is hydrogen or methyl;(2) preparation of said polymers and(3) uses of said polymers.Type: GrantFiled: April 18, 1988Date of Patent: February 21, 1989Assignee: GAF CorporationInventors: David J. Tracy, Mohamed M. Hashem, Fulvio J. Vara
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Patent number: 4792400Abstract: The invention relates to a highly filterable, water insoluble vinyl lactam polymer and to a process for improving filterability of such polymer which comprises irradiation with a source of radiant energy at a dosage sufficient to effect additional cross-linking and or saturation of the polymer.Type: GrantFiled: March 9, 1987Date of Patent: December 20, 1988Assignee: GAF CorporationInventors: James Dougherty, Harold O. Locke, Fulvio J. Vara, Robert B. Login, Terry E. Smith
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Patent number: 4786699Abstract: Polyvinylpyrrolidone having a Fikentscher K value of from 14 to 95 is prepared at from 50.degree. to 95.degree. C. in aqueous solution with hydrogen peroxide as starter, the solution being maintained at pH 7-11 by means of NaOH, KOH, their carbonates or bicarbonates.Type: GrantFiled: January 19, 1988Date of Patent: November 22, 1988Assignee: BASF AktiengesellschaftInventors: Adolf Nuber, Siegfried Lang, Axel Sanner, Gerd Schroeder
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Patent number: 4785065Abstract: Binders are used in printing inks and print pastes for transfer printing, consisting of copolymers of N-vinylcaprolactam, the use of these copolymers as binders in printing inks and printing pastes, and printing inks and print pastes containing these.Type: GrantFiled: June 30, 1987Date of Patent: November 15, 1988Assignee: BASF AktiengesellschaftInventors: Guenter Uhl, Rudolf Toex, Gerhard Schroeder, Klaus Schnell
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Patent number: 4780516Abstract: Silylmethylene metharcylate polymers and optical contact lenses fabricated therefrom are disclosed.Type: GrantFiled: June 15, 1987Date of Patent: October 25, 1988Inventor: William M. Foley, Jr.
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Patent number: 4767613Abstract: A terpolymer of vinylpyrolidone, tert-butyl (meth)acrylate and acrylic or methacrylic acid, its use in hair treatment agents, and hair cosmetics compositions which contain these agents.Type: GrantFiled: July 23, 1987Date of Patent: August 30, 1988Assignee: BASF AktiengesellschaftInventors: Adolf Nuber, Axel Sanner, Ferdinand Straub, Friedrich Vogel
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Patent number: 4764575Abstract: Hydrophilic polymers of the type suitable for use in making contact lenses and having a wide range of controllable properties including strength and gas permeability are formed from acrylonitrile or methyl methacrylate or an analogue thereof, 1-vinyl-2-pyrrolidinone and an appropriate amount of a cross-linking agent. Contact lenses (3) having an interferometric pattern thereon are also disclosed.Type: GrantFiled: November 25, 1986Date of Patent: August 16, 1988Inventors: Donald J. Highgate, John D. Frankland
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Patent number: 4764588Abstract: The invention relates to highly filterable polyvinyl polypyrrolidone particles and to the process for improving filterability of standard polyvinyl polypyrrolidone granules, wet cakes and slurries which comprises heating granular polyvinyl polypyrrolidone, containing a minor amount of non-crosslinked and/or unsaturated sites while maintaining between 1 wt. % and 20 wt. % moisture at a temperature of between about 50.degree. C. and about 250.degree. C. under a pressure of from about 5 psig. to about 200 psig. and collecting product having an average particle size distribution between about 40 and 400 mesh, a non-volatile water solubles (NVWS) content less than 2% and a filter flow rate greater than 95.Type: GrantFiled: March 9, 1987Date of Patent: August 16, 1988Assignee: GAF CorporationInventors: Terry E. Smith, Ian W. Cottrell, John D. Pelesko
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Patent number: 4758492Abstract: The invention provides new weakly acidic crosslinked vinyl polymer particles having utility as components of coating compositions, liquid electrographic developers, and layers of electrographic elements and records.The polymeric particles of the invention are characterized in that each particle has a weakly acidic surface and an average diameter less than one micrometer and comprises a crosslinked vinyl addition copolymer obtainable by aqueous emulsion polymerization of a mixture of monomers in the presence of a polymerization initiator.Type: GrantFiled: April 30, 1986Date of Patent: July 19, 1988Assignee: Eastman Kodak CompanyInventor: Mridula Nair
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Patent number: 4749761Abstract: A cross-linked, hydrogel polymer for contact lenses with a water uptake of between 60 and 70% by weight based on the total weight of hydrogel is formed from a mixture of monomer components containing (1) N-vinyl-2-pyrrolidone, (2) alkyl methacrylate and (3) a compound of formula ##STR1## in which R.sup.1 is hydrogen or a lower alkyl group, preferably methyl, and R.sup.2 is either a substituted or unsubstituted aryl group or an alkyl group containing from 1 to 6 carbon atoms substituted by a substituted or unsubstituted aryl group or a substituted or unsubstituted aryloxygroup or by a cycloalkyloxygroup. Preferably the alkyl methacrylate is hydroxyethyl methacrylate and the third component phenethyl methacrylate. Cross-linking agents used preferably have their two functional groups differing in reactivity, for example allyl methacrylate.Type: GrantFiled: January 27, 1987Date of Patent: June 7, 1988Assignee: Smith & Nephew Associated Companies p.l.c.Inventor: John G. B. Howes
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Patent number: 4749498Abstract: Water-soluble polymers consisting of from 40 to 80 mole percent of residues corresponding to the following formula (I) ##STR1## in which X.sup..sym. is a cation or H.sup..sym., from 10 to 30 mole percent of residues corresponding to the following formula (II) ##STR2## from 0 to 30 mole percent of residues corresponding to the following formula (III) ##STR3## and from 0 to 10 mole percent of residues corresponding to the following formula (IV) ##STR4## residues I to IV being statistically distributed in the polymer and the sum of the mole % of I-IV always having to amount to 100.Type: GrantFiled: July 14, 1986Date of Patent: June 7, 1988Assignee: Wolff Walsrode AktiengesellschaftInventors: Werner Lange, Branislav Bohmer
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Patent number: 4743666Abstract: Water-soluble copolymers containing a statistical distribution of 1-86% by weight of structural units of the formula ##STR1## 9-80% by weight of units of the formula ##STR2## 5-90% by weight of units of the formula ##STR3## and up to a total of 30% by weight of one or more units of the formulae ##STR4## wherein R.sup.1 is alkyl having 1 to 4 carbon atoms;R.sup.2 and R.sup.5 independently of one another are each hydrogen or methyl;R.sup.3 and R.sup.4 independently of one another are each hydrogen, methyl or ethyl, or together R.sup.3 and R.sup.4 are trimethylene or pentamethylene;Y is a direct bond, phenylene or a moiety of the formula --CO--NH--C(CH.sub.3).sub.2 --CH.sub.2 --;X.sym. is H.sym. or a cation;and said copolymers are useful as dyestuff auxiliaries and leather retanning agents.Type: GrantFiled: July 14, 1986Date of Patent: May 10, 1988Assignee: Cassella AktiengesellschaftInventors: Friedrich Engelhardt, Klaus Kuhlein, Juliane Balzer, Walter Dursch, Hans-Jerg Kleiner
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Patent number: 4739008Abstract: Water-in-oil emulsions of monomers which form water-soluble polymers are polymerized in the presence of a biphase initiator system containing both an oil-soluble initiator and a water-soluble initiator or activator or alternatively a water-soluble initiator and an oil-soluble activator which results in polymers having improved performance characteristics. In addition, the system permits the satisfactory polymerization of monomers which could not have been reproducibly polymerized.Type: GrantFiled: November 18, 1986Date of Patent: April 19, 1988Assignee: Exxon Chemical Patents Inc.Inventors: Peter M. Robinson, Nguyen Van-Det
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Patent number: 4727116Abstract: The present invention relates to new water-soluble copolymers based on acrylic acid derivatives and their use as building material auxiliaries.Type: GrantFiled: August 4, 1986Date of Patent: February 23, 1988Assignee: Wolff Walsrode AGInventors: Werner Lange, Frank Hohl, Klaus Szablikowski
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Patent number: 4710557Abstract: A monomer having the formula: ##EQU1## wherein: R.sup.1 is H or methyl;R.sup.2, R.sup.3 and R.sup.4 are independently alkyl, aryl, or aralkyl; andR.sup.5 and R.sup.6 are independently H, halo, alkyl, aryl, aralkyl, thioalkyl, thioaryl, or thioaralkyl, is useful in preparing a polymer having a high refractive index. The polymer is useful in forming optical components, such as lenses.Type: GrantFiled: August 14, 1986Date of Patent: December 1, 1987Assignee: Eastman Kodak CompanyInventor: David P. Warren
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Patent number: 4704436Abstract: The invention relates to a novel water soluble .alpha.-methyl-(2-methylpropyl)benzene acetic acid in a complexed state which is derived from the reaction between an N-vinyl-2-pyrrolidone copolymer and the .alpha.-methyl-(2-methyl-propyl)benzene acetic acid and to the process for the preparation of said complex.Type: GrantFiled: May 2, 1986Date of Patent: November 3, 1987Inventor: Eugene S. Barabas
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Patent number: 4701509Abstract: Novel acrylate, hot melt, pressure-sensitive adhesives are disclosed which are polymerized compositions of:______________________________________ Starting Monomer %, by Polymer Weight ______________________________________ 2-ethylhexyl acrylate (2-EHA) 20-80 n-butyl acrylate (BA) 0-45 isobutyl methacrylate (IBMA) 15-25 N--vinyl caprolactam (NVCL) 10-25 ______________________________________useful for medical products such as ostomy seals, adhesive tapes and bandages, wound drainage adhesive seals, wound dressings and the like that adhere well to human skin even under moist conditions.Type: GrantFiled: September 17, 1984Date of Patent: October 20, 1987Assignee: Johnson & Johnson Products, Inc.Inventors: Robert L. Sun, James F. Kenney
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Patent number: 4675182Abstract: The present invention relates to complexes of prostaglandins and crosspovidone, pre-pasted starch or dextrans, a process for the preparation of these complexes, their use in or as medicaments, and medicaments or pharmaceutical formulations containing complexes of prostaglandins or crosspovidone, pre-pasted starch or dextrans.Type: GrantFiled: January 27, 1984Date of Patent: June 23, 1987Assignee: Bayer AktiengesellschaftInventors: Bernhard Streuff, Detlef Mathes, Bernd Schade, Ulrich Schorsch
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Patent number: 4666992Abstract: The invention relates to a novel water soluble D-threo-(1,1'-dihydroxy-1-p-nitrophenylisopropyl) dichloroacetamide in a complexed state which is derived from the reaction between an N-vinyl-2-pyrrolidone copolymer and the D-threo-(1,1'-dihydroxy-1-p-nitrophenylisopropyl) dichloroacetamide and to the process for the preparation of said complex.Type: GrantFiled: September 2, 1986Date of Patent: May 19, 1987Assignee: GAF CorporationInventor: Eugene S. Barabas
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Patent number: 4663408Abstract: The present invention relates to improved viscosification agents for an aqueous or brine solutions. Typically, the viscosification agents are tetrapolymers of N-vinyl pyrrolidone/acrylamide/salt of acrylic acid/N-alkyl acrylamide wherein said tetrapolymers have the formula: ##STR1## wherein w is about 1 to about 80 mole percent, more preferably about 5 to about 75 mole percent, and most preferably about 10 to about 70 mole percent; x is about 10 to about 90 mole percent, more preferably about 20 to about 80 mole percent, and most preferably about 30 to about 70 mole percent; and y is about 0.1 to about 10.0 mole percent, more preferably about 0.15 to about 5.0 mole percent; and most preferably about 0.2 to about 3.0 mole percent; z is about 1.0 to about 30.0 mole percent, more preferably about 2.0 to about 25.0 mole percent, and most preferably about 5.0 to about 20.Type: GrantFiled: December 30, 1985Date of Patent: May 5, 1987Assignee: Exxon Research and Engineering CompanyInventors: Donald N. Schulz, Enock Berluche, John J. Maurer, Jan Bock
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Patent number: 4658002Abstract: Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an N-vinylcarboxamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylates, methacrylates and/or a vinyl ester and (b) from 0.1 to 10% by weight, based on the total amount of monomers, of, as a crosslinking agent, a compound possessing two or more ethylenically unsaturated double bonds, in a powder bed in the presence of a heat-transfer medium and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., the powder state being maintained, the reaction mass being circulated and the heat-transfer medium evaporated from the polymerization zone.The resulting polymers are used as adsorbents, as formulation assistants for crop protection agents or as ion exchangers.Type: GrantFiled: September 18, 1985Date of Patent: April 14, 1987Assignee: Basf AktiengesellschaftInventors: Chung-Ji Tschang, Karlheinz Messmer, Walter Denzinger
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Patent number: 4656236Abstract: This invention relates to terpolymers which are capable of forming hydrogels having very good compatibility with living tissues and may be used as substitutes for damaged tissues, as in the form of implants and various prostheses. The terpolymers are comprised of an oligourethane having an average molecular weight from 1200 to 3000, 2-hydroxyethyl(meth)acrylate or 2-hydroxypropyl(meth)acrylate, and N-vinylpyrrolidone.Type: GrantFiled: January 28, 1986Date of Patent: April 7, 1987Assignee: Ceskoslovenska akademie vedInventors: Slavko Hudecek, Iva Hudeckova, Jaroslava Otoupalova, Pavel Cefelin
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Patent number: 4647637Abstract: Insoluble polymer powders which are only slightly swellable and are based on N-vinylpyrrolidone are prepared by polymerization of N-vinylpyrrolidone or a mixture of this with copolymerizable monomers and from 0.1 to 10% by weight, based on the total amount of monomers, of a crosslinking agent in a powder bed in the presence of a heat-transfer medium, which is inert to the reactants, and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., while maintaining the powder state, circulating the reaction mass and evaporating the heat-transfer medium from the polymerization zone. The resulting insoluble polymers which are only slightly swellable are used as adsorbents or formulation assistants for fertilizers and crop protection agents.Type: GrantFiled: September 18, 1985Date of Patent: March 3, 1987Assignee: BASF AktiengesellschaftInventors: Chung-Ji Tschang, Karlheinz Messmer, Walter Denzinger
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Patent number: 4644020Abstract: Water-soluble polymers comprising an N-vinyl lactam are found to be useful in processes wherein the polymer is introduced into a subterranean wellbore.Polymers useful in the recovery of natural resources are prepared by polymerizing an N-vinyl lactam by free radical initiation, with polymerization conducted in an aqueous solution polymerization medium preferably containing a mixture of dissolved electrolytes, or in a polymerization medium consisting essentially of a tertiary alkanol. Copolymers of such N-vinyl lactams with unsaturated amides, and terpolymers prepared by polymerizing an N-vinyl lactam and an unsaturated amide with a selected termonomer compound are also useful when prepared by these methods.Type: GrantFiled: January 28, 1983Date of Patent: February 17, 1987Assignee: Phillips Petroleum CompanyInventor: G. Allan Stahl
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Patent number: 4640941Abstract: Hydrogel polymeric material, suitable for preparing optical devices such as contact lenses. The material is of improved oxygen permeability and mechanical properties in comparison with conventional hydrogels. It comprises, in addition to the hydrogel material, from about 5% to about 60% by weight of a siloxane comonomer containing both an aromatic ring and vinyl functionality. Its cooperation and combination of performance characteristics with traditional hydrogel forming monomers provides a very useful polymeric material for making lenses of the soft hydrogel type.Type: GrantFiled: January 7, 1986Date of Patent: February 3, 1987Assignee: Alcon LaboratoriesInventors: Joonsup Park, Joseph J. Falcetta
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Patent number: 4620954Abstract: In the particular embodiment described in the specification, a contact lens hydrogel is prepared by copolymerizing 75 parts of N-vinyl pyrrolidone and 23 parts of phenyl ethyl methacrylate together with allyl methacrylate as a crosslinker, t-butyl peroctoate as a thermal initiator and 2,2-dimethoxy-2-phenylacetophenone or benzoin methyl ether as a photoinitiator. The mixture is maintained at a temperature of 5.degree. C. and protected from light prior to photopolymerization which is carried out under ultraviolet radiation. The copolymer is then post-cured thermally. Cloudy or hazy hydrogels are avoided by preventing prepolymerization of the mixture.Type: GrantFiled: June 7, 1985Date of Patent: November 4, 1986Assignee: CIBA Vision Care Corp.Inventors: Helmut Singer, Ellen Bellantoni, Albert R. LeBoeuf
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Patent number: 4605718Abstract: Water-soluble monomers and water-soluble polymers derived therefrom are disclosed. These materials can be used with other vinyl monomers to form water-soluble polymers which are reactive with cellulosic substrates to obtain drastically improved strength, particularly when applied in paper manufacture. The polymers contain at least two mole percent of a monomer represented by the chemical structure: ##STR1## wherein R is H, CH.sub.3, or C.sub.2 H.sub.5 ; andA is O, or N(R.sub.1); andB is CH.sub.2, CH.sub.2 CH.sub.2 O, ##STR2## and D is ##STR3## and wherein R.sub.1 is H, CH.sub.3, C.sub.2 H.sub.5, (CH.sub.2 CH.sub.2 O).sub.n H, or (B).sub.q D, and wherein q is from 1-6, except when B contains nitrogen in which case q is always one; and wherein R.sub.2 is H, CH.sub.3, C.sub.2 H.sub.5, or (CH.sub.2 CH.sub.2 O).sub.n H; and wherein R.sub.4 and R.sub.5 may be the same or different and are, for each individual occurrence, H, CH.sub.3, C.sub.2 H.sub.5 ; and wherein Z is from the group Cl, Br, I, NO.sub.3, SO.sub.Type: GrantFiled: December 24, 1984Date of Patent: August 12, 1986Assignee: Nalco Chemical CompanyInventors: Roger H. Jansma, Karen R. Sandberg
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Patent number: 4602074Abstract: A contact lens material made of an organosiloxane ester copolymer. The organosiloxane is represented by the general formula: ##STR1## and the ester is composed of C.sub.1 -C.sub.10 mono- or multi-valent alcohol and methacrylic acid, acrylic acid or itaconic acid. The contact lens is oxygen permeable and substantially free of water-absorption, so that it is easy to handle. It may be worn comfortably for extended period.Type: GrantFiled: December 18, 1984Date of Patent: July 22, 1986Assignee: Nippon Contact Lens Manufacturing Ltd.Inventors: Yutaka Mizutani, Tatsuo Harata, Naokatsu Tanahashi
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Patent number: 4600759Abstract: Process for copolymerization of vinylpyrrolidone and maleic anhydride in the presence of organic solvent, catalyst and between about 0.1 and 1.0 weight % water.Type: GrantFiled: December 10, 1984Date of Patent: July 15, 1986Assignee: Gaf CorporationInventor: Eugene S. Barabas
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Patent number: 4595737Abstract: Water-soluble terpolymers which contain, as copolymerized units,(a) from 10 to 35% by weight of an N-vinyllactam or an N-vinyl acid amide,(b) from 5 to 20% by weight of acrylic acid or of a salt of acrylic acid and(c) from 80 to 50% by weight of a C.sub.1 -C.sub.4 -alkyl vinyl ether,and have a glass transition temperature T.sub.g below 60.degree. C. can be prepared by polymerizing the monomer mixture in an inert organic solvent in the presence of a polymerization initiator and can, where appropriate, be partially or completely neutralized with a base, so as to form a salt. The products may be used as raw materials for adhesives or, in the form of an aqueous solution, as the adhesive itself.Type: GrantFiled: June 26, 1985Date of Patent: June 17, 1986Assignee: BASF AktiengesellschaftInventors: Ferdinand Straub, Oral Aydin, Wolfgang Linke, Gerd Schroeder, Peter Fickeisen
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Patent number: 4585846Abstract: The present invention relates to homopolymers and copolymers of N-(4-sulfoalkyl)N-methyldiallyl ammonium betaines which are useful as aqueous viscosification agents.Type: GrantFiled: January 2, 1985Date of Patent: April 29, 1986Assignee: Exxon Research and Engineering Co.Inventors: Donald N. Schulz, Jeffrey J. Kaladas
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Patent number: 4585845Abstract: Crosslinked copolymers wherein crosslinking is effected with crosslinking bridge members of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each hydrogen or alkyl with 1 to 4 carbon atoms and m represents a number from 0 to 6 are prepared by copolymerization of monomers with vinylphosphonic acid (ester)-anhydrides and the new crosslinked polymers according to the invention are suitable for the preparation of acid-soluble coatings and encapsulation materials.Type: GrantFiled: April 9, 1984Date of Patent: April 29, 1986Assignee: Cassella AktiengesellschaftInventors: Friedrich Engelhardt, Klaus Kuhlein, Juliane Balzer, Walter Dursch, Hans-Jerg Kleiner
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Patent number: 4581430Abstract: 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.Type: GrantFiled: July 20, 1984Date of Patent: April 8, 1986Assignee: Armstrong World Industries, Inc.Inventors: Xuan T. Phan, Paul J. Shannon
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Patent number: 4563499Abstract: Polyoxyalkylene foam stabilizing surfactants can be prepared by reacting a polyoxyalkylene adduct, a cyclic nitrogenous vinyl monomer and an esterified unsaturated dibasic acid under free radical polymerization conditions in the presence of a free radical initiator, and by subjecting the reaction product obtained to a solvent extraction. The isolated components can be utilized as surfactants in producing cellular foams.Type: GrantFiled: April 12, 1985Date of Patent: January 7, 1986Assignee: The Celotex CorporationInventors: Richard L. Frentzel, Ernest K. Moss
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Patent number: 4551512Abstract: Readily water-soluble, slightly hygroscopic terpolymers which consist of(a) from 10 to 40% by weight of vinylpyrrolidone,(b) from 20 to 50% by weight of vinyl acetate (VAc) or vinyl propionate and(c) from 10 to 40% by weight of hydroxyethyl acrylate, hydroxypropyl acrylate or hydroxyethyl methacrylate, which terpolymers are used as auxiliaries in the cosmetics and pharmaceuticals sectors.Type: GrantFiled: April 6, 1984Date of Patent: November 5, 1985Assignee: BASF AktiengesellschaftInventors: Ferdinand Straub, Axel Sanner, Karl Seib, Siegfried Lang
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Patent number: 4548990Abstract: A controlled-release, drug-delivery composition which comprises (A) a crosslinked copolymer, capable of swelling in ethanol to give a swollen copolymer containing at least 40% by weight of ethanol, and capable of swelling in water to give a swollen copolymer containing no more than 20% by weight of water, where the swelling ratio (% ethanol: % water) is 2:1 to 22:1, which comprises the copolymerization product of (a) 50 to 99% by weight of said copolymer of a water-insoluble monoolefinic monomer or (a) with 0 to 45% by weight of total monomers of a water-soluble monoolefinic monomer, with (b) 50 to 1% by weight, but not more than 20 mol % of a divinyl or polyvinyl crosslinking agent; and (B) an effective amount of a pharmaceutical medicament is useful for the controlled and prolonged release of drugs when taken orally.Type: GrantFiled: August 15, 1983Date of Patent: October 22, 1985Assignee: Ciba-Geigy CorporationInventors: Karl F. Mueller, Sonia J. Heiber
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Patent number: 4547550Abstract: 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.Type: GrantFiled: November 7, 1984Date of Patent: October 15, 1985Assignee: The General Tire & Rubber CompanyInventors: Earl G. Melby, Hubert J. Fabris, Russell A. Livigni, Harry W. Cocain
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Patent number: 4544722Abstract: Novel water-soluble terpolymers comprising:______________________________________ Ingredients Mole % ______________________________________ 2-acrylamido-2-methylpropane- 58-77 sulfonic acid, sodium salt (AMPS) N--vinylp;yrrolidone 2-20 acrylonitrile 4-36 ______________________________________These terpolymers provide high temperature fluid loss additives and rheology stabilizers for high calcium-containing brine clay drilling fluids.Type: GrantFiled: October 25, 1984Date of Patent: October 1, 1985Assignee: Nalco Chemical CompanyInventors: David M. Giddings, Donald G. Ries, Allen R. Syrinek
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Patent number: H509Abstract: Adhesives comprising microparticles of acrylate copolymers are formed from higher homologs of acrylates and methacrylates. By varying the type and amount of monomers used in the starting solution the tack level may be varied. Very high tack levels are achieved with compositions made from isodecyl acrylate and 2-ethylhexyl acrylate where acrylic acid, isobornyl acrylate and vinyl pyrrolidone are included in the starting mixture and where polyvinyl alcohol is used to avoid agglomeration.Type: GrantFiled: December 22, 1987Date of Patent: August 2, 1988Inventor: Hung-Ya Chao