Monomer Contains Nitrogen Atom As Part Of A Heterocyclic Ring Patents (Class 524/808)
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Patent number: 4911960Abstract: Wet laminating adhesives capable of withstanding the stresses encountered during heat sealing operations are prepared from emulsion copolymers consisting essentially of 45 to 80% by weight of a vinyl ester of an alkanoic acid, 10 to 30% ethylene, 5 to 30% of dialkyl maleate, 0.5 to 2% of an N-methylol containing comonomer and 0.5 to 4% of an ethylenically unsaturated mono- or di-carboxylic acid. These specific emulsion copolymers are prepared utilizing standard emulsion polymerization procedures with hydroxyethylcellulose or polyvinyl alcohol as a protective colloid. The emulsion polymers thus produced provide superior wet laminating adhesive properties for use in substrates which are to be formed into microwavable packages or bags.Type: GrantFiled: January 19, 1988Date of Patent: March 27, 1990Assignee: National Starch and Chemical CorporationInventors: Paul R. Mudge, James L. Walker, Terence M. Barnhart
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Patent number: 4845138Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.Type: GrantFiled: April 15, 1988Date of Patent: July 4, 1989Assignee: Exxon Chemical Patents Inc.Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det
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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: 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: 4785036Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.Type: GrantFiled: May 27, 1987Date of Patent: November 15, 1988Assignee: Exxon Chemical Patents Inc.Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det
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Patent number: 4771086Abstract: Finely divided water insoluble solid particles free of ionic charges and ranging in size from about 0.01 to several hundred microns or higher, including but not limited to paint pigment particles, are given a generally uniform polymeric encapsulation by admixing such particles in an aqueous reaction medium with a water insoluble monomer polymerizable to form a generally water insoluble polymer free of ionic charges in the presence of a nonionic surface active stabilizing agent, preferably a polyethoxylated alkyl phenol containing at least about eight carbon atoms in the alkyl group thereof and preferably at least about 40-50 ethylene oxide groups per molecule, and polymerization of the monomer is then initiated, usually with heating, with a redox polymerization initiating system which is free of ionic groups and does not decompose to release ionic groups in the reaction medium.Type: GrantFiled: August 22, 1986Date of Patent: September 13, 1988Assignee: Union Carbide CorporationInventor: Robert W. Martin
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Patent number: 4765923Abstract: Methods and compositions for reducing organic color contamination in influent water are disclosed. The methods comprise adding to the influent water powdered activated carbon and a water soluble or water dispersible cationic polymer. The polymers are chosen from: (a) polyquaternary ammonium polymers formed from reaction of a secondary amine with an epichlorohydrin or epoxide (b) cross-linked polyquaternary ammonium polymers formed from reaction of a secondary amine, epichlorohydrin or epoxide, and a third reactant selected from the group consisting of ammonia, primary amines, alkylenediamines and polyamines and (c) substantially linear high molecular weight polyquaternary ammonium polymers of the type disclosed in U.S. Pat. No. 3,288,770, such as polydiallyldimethyl ammonium chloride. Compositions comprise a slurry comprising powdered activated carbon and at least one polymer chosen from the (a) (b) and (c) groupings and mixtures thereof.Type: GrantFiled: May 1, 1987Date of Patent: August 23, 1988Assignee: Betz Laboratories, Inc.Inventor: Gerald C. Walterick, Jr.
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Patent number: 4757109Abstract: A process for the preparation of maleimide copolymers by emulsion polymerization of 50 to 80% by weight of an aromatic vinyl monomer, 10 to 30% by weight of a vinyl cyanide monomer, and 5 to 40% by weight of a maleimide monomer comprising a three step polymerization process wherein the remaining vinyl cyanide monomer is separately added in the third step of said process.Type: GrantFiled: October 14, 1986Date of Patent: July 12, 1988Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kazuo Kishida, Yutaka Toyooka, Atsushi Kimura
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Patent number: 4735989Abstract: A process is provided for coating an electrically conductive substrate with an aqueous coating composition containing a cationic binder wherein the binder is obtained by polymerization of 100 parts by weight of a specific monomer mixture in the presence of 1-20 parts by weight of an epoxy group-free adduct of a bisphenol bisglycidyl ether and an ethylenically unsaturated amido amine. The ethylenically unsaturated amido amine, in turn, is the product of a polyamine having 1-2 primary amino groups and 1-2 secondary amino groups and an ethylenically unsaturated monocarboxylic acid having 18-24 carbon atoms. The invention also pertains to the aqueous coating composition as such.Type: GrantFiled: May 29, 1987Date of Patent: April 5, 1988Assignee: Akzo NVInventors: Chantal H. Guioth, Etienne G. Maze, Jean J. Trescol
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Patent number: 4735991Abstract: A process is provided for coating an electrically conductive substrate with an aqueous composition containing a cationic binder wherein the binder is obtained by polymerization of 100 parts by weight of a specified monomer mixture in the presence of 0.25 to 4 parts by weight of an acrylic or methacrylic bisphenol ester. The invention also pertains to the aqueous composition as such.Type: GrantFiled: June 2, 1987Date of Patent: April 5, 1988Assignee: Akzo NVInventors: Chantal H. Guioth, Etienne G. Maze, Loick P. Rabajoie
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Patent number: 4680336Abstract: A method for forming shaped hydrogel articles such as soft contact lenses wherein hydrophilic monomers are mixed with an inert diluent prior to polymerization, and the diluent is replaced with water following the polymerization. Diluents yielding optically clear hydrogels with good mechanical properties are selected on the basis of their viscosity and their Hanson cohesion parameters relative to the cohesion parameters of the polymeric component of the hydrogel.Type: GrantFiled: February 19, 1985Date of Patent: July 14, 1987Assignee: Vistakon, Inc.Inventors: Hans O. Larsen, Ture Kindt-Larsen
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Patent number: 4608401Abstract: Finely divided water insoluble solid particles free of ionic charges and ranging in size from about 0.01 to several hundred microns or higher, including but not limited to paint pigment particles, are given a generally uniform polymeric encapsulation by admixing such particles in an aqueous reaction medium with a water insoluble monomer polymerizable to form a generally water insoluble polymer free of ionic charges in the presence of a nonionic surface active stabilizing agent, preferably a polyethoxylated alkyl phenol containing at least about eight carbon atoms in the alkyl group thereof and preferably at least about 40-50 ethylene oxide groups per molecule, and polymerization of the monomer is then initiated, usually with heating, with a redox polymerization initiating system which is free of ionic groups and does not decompose to release ionic groups in the reaction medium.Type: GrantFiled: July 26, 1985Date of Patent: August 26, 1986Assignee: Union Carbide CorporationInventor: Robert W. Martin
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Patent number: 4585809Abstract: An aqueous dispersion of a copolymer comprising:(A) from 20 to 90 percent by weight of an unsaturated carboxylic acid of the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 are hydrogen, alkyl, or --(CH.sub.2).sub.n COOM and M is a proton or an alkali metal or alkaline earth metal or an ammonium cation, and(B) from 10 to 80 percent of at least one other comonomer different from and copolymerizable with A; methods of making a ready-to-use foundry molding sand by mixing such a dispersion with sand; and such ready-to-use foundry molding sands.Type: GrantFiled: February 10, 1984Date of Patent: April 29, 1986Assignee: Rohm GmbHInventors: Heinz-Jochen Auer, Wolfgang Klesse, Peter Quis, Walther W. Szubinski
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Patent number: 4554312Abstract: 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.Type: GrantFiled: February 11, 1985Date of Patent: November 19, 1985Assignee: GAF CorporationInventors: Eugene S. Barabas, James R. Cho
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Patent number: 4554311Abstract: 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.Type: GrantFiled: February 11, 1985Date of Patent: November 19, 1985Assignee: GAF CorporationInventors: Eugene S. Barabas, James R. Cho
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Patent number: 4508860Abstract: In a method of incorporating fibers in a rubber matrix, an improved fiber pretreatment is disclosed which comprises mixing from 3% to 15% by weight vinyl pyridine latex with a fiber-in-water mixture of essentially delignified hardwood fibers which have not been subjected to post-delignification drying, said mixture having a consistency of from 10% to 40% solids, subsequently expressing water and drying the treated fiber.Type: GrantFiled: March 7, 1984Date of Patent: April 2, 1985Assignee: Westvaco CorporationInventor: David H. Hawes
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Patent number: 4508869Abstract: Latexes containing particles having pendant coreactive groups and oxazoline groups are disclosed. Said latexes are self-curing yielding films and other articles having excellent tensile strength and resistance to water and other solvents. In addition, a process for making such latexes is disclosed.Type: GrantFiled: June 14, 1983Date of Patent: April 2, 1985Assignee: The Dow Chemical CompanyInventors: William H. Keskey, James E. Schuetz, Do I. Lee
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Patent number: 4492494Abstract: The invention relates to a process for stabilizing an aqueous gel-forming system comprising one or more water-soluble acrylic monomer as gellifying agent, methylenebis-acrylamide co-monomer and/or one or more mono- or bivalent aldehyde as cross-linking agent, a redox catalyst system containing an alkali metal and/or ammonium persulfate as oxidizing component along with one or more amine compound as reducing component, furthermore optionally one or more water-soluble polymer for adjusting the viscosity of the solution and/or modifying the gel structure. According to the invention said gel-forming system is stabilized by saturating it with molecular oxygen.The invention relates further to a process for improving the strength and impermeability of particulate materials and/or solid articles.Type: GrantFiled: August 5, 1981Date of Patent: January 8, 1985Assignees: Magyar Tudomanyos Akademia Termeszettudomanyi Kutato Laboratorium, Foldmero es Talajvizsgalo VallalatInventors: Tamas Szekely, Ferenc Csanda, Gabor Nagy, Gyozo Czerny
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Patent number: 4492776Abstract: A process is disclosed for the preparation of hydrogel contact lenses having improved mechanical properties, said process comprising polymerizing, in the presence of an azo type initiator, a monomer mixture comprising from 25% to 50% by weight of N-vinyl pyrrolidone, up to 5% by weight of methacrylic or acrylic acid, 0.1 to 1% by weight of 1,3,5-tris(propenoxy)-2,4,6-triazine (TPT), or perhydro-2,4,6,-triketo-1,3,5,-tris (propene-2)-1,3,5-triazine (T.T.P.T.), as a cross-linking monomer, the balance being essentially hydroxy alkyl acrylate or methacrylate, wherein the alkyl group is ethyl or propyl.Type: GrantFiled: April 12, 1984Date of Patent: January 8, 1985Assignee: CooperVision, Inc.Inventors: Ivor B. Atkinson, Barry C. Holdstock
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Patent number: 4474923Abstract: Self-curable latex compositions contain particles of an oxazoline-modified polymer and particles of a coreactive polymer. These latex compositions are curable, yielding films and other articles having good tensile and elongation properties and excellent resistance to water and aqueous fluids. In addition, these latex compositions are self-curing at room temperature.Type: GrantFiled: June 14, 1983Date of Patent: October 2, 1984Assignee: The Dow Chemical CompanyInventors: William H. Keskey, James E. Schuetz, Do I. Lee, James E. Schwartz
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Patent number: 4460029Abstract: A latex is prepared by polymerizing (a) an addition polymerizable oxazoline (such as 2-isopropenyl-2-oxazoline) and (b) at least one other monomer (such as a mixture of styrene and butadiene). The latexes of this invention are useful for promoting adhesion between a polymeric elastomer and a substrate, especially for promoting adhesion between tire cords and tire rubber.Type: GrantFiled: December 1, 1982Date of Patent: July 17, 1984Assignee: The Dow Chemical CompanyInventors: James E. Schuetz, William H. Keskey
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Patent number: 4451630Abstract: A process is disclosed for the preparation of hydrogel contact lenses having improved mechanical properties, said process comprising polymerizing, in the presence of an azo type initiator, a monomer mixture comprising from 25% to 50% by weight of N-vinyl pyrrolidone, up to 5% by weight of methacrylic or acrylic acid, 0.1 to 1% by weight of 1,3,5-tris(propenoxy)-2,4,6-triazine (TPT), or perhydro-2,4,6,-triketo-1,3,5,-tris (propene-2)- 1,3,5 - triazine (T.T.P.T.), as a cross-linking monomer, the balance being essentially hydroxy alkyl acrylate or methacrylate, wherein the alkyl group is ethyl or propyl.Type: GrantFiled: June 16, 1983Date of Patent: May 29, 1984Inventors: Ivor B. Atkinson, Barry C. Holdstock
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Patent number: 4360632Abstract: This invention relates to an improvement in a process for producing a latex containing dispersed polymer. The improvement in the process for polymerizing a reaction mixture of vinyl monomer, stabilizer, oxidizing agent and reducing agent comprises using a water-soluble ketone bisulfite as the reducing agent, either alone or with other reducing agents, the ketone having from 3 to 8 carbon atoms in the structure. During the polymerization, the ketone bisulfite is maintained in stoichiometric excess of the oxidizing agent. Vinyl acetate-ethylene copolymers are some of the preferred polymer systems produced.Type: GrantFiled: October 23, 1981Date of Patent: November 23, 1982Assignee: Air Products and Chemicals, Inc.Inventors: Robert K. Pinschmidt, Jr., Finn L. Marten
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Patent number: 4355131Abstract: An aqueous alkaline dispersion of a rubbery graft or over polymerized copolymer of a diene and a vinyl pyridine on a polyacrylate seed (core or substrate), said acrylate polymer having a Tg of not above about -20.degree. C., desirably also containing a polybutadiene, and a water soluble, heat reactable phenolic resin, in certain amounts is useful in forming an adhesive for bonding glass fiber reinforcing elements or cords to rubber compounds or stocks. After dipping the glass fiber cord in the one-step adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing glass fiber cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured to form a composite in which the glass fiber cord is bonded to the rubber by means of said adhesive.Type: GrantFiled: December 17, 1981Date of Patent: October 19, 1982Assignee: The General Tire & Rubber CompanyInventor: Richard M. Wise
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Patent number: 4330451Abstract: 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.Type: GrantFiled: October 16, 1980Date of Patent: May 18, 1982Assignee: BASF AktiengesellschaftInventors: Ferdinand Straub, Heinrich Hartmann, Paul Naegele, Karl Seib