Patents Examined by T. M. Reddick
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Patent number: 5086111Abstract: Polyvinylaminals, optionally as the formed copolymer with polyvinylhemiaminals, and polyvinylacetals are useful as flocculants and epoxy resin and polyurethane crosslinking agents and are provided by reacting a poly(vinylamine) or a copolymer containing vinyl alcohol and vinylamine units with a monoaldehyde. The aldehyde, such as butyraldehyde, can be introduced in the polymer acetalization as a liquid or gas, generally in a proportion of about 0.02 to 0.5 mol per mol of alcohol and amine units in the polymer chain.Type: GrantFiled: May 17, 1990Date of Patent: February 4, 1992Assignee: Air Products and Chemicals, Inc.Inventors: Robert K. Pinschmidt, Jr., Ta-Wang Lai
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Patent number: 5011882Abstract: An aqueous coating composition comprising (A) 100 parts by weight of an acrylic resin powder having an acid value of 15 to 200, (B) 25 to 900 parts by weight of an acrylic graft polymer having an acid value of 20 to 100, which is composed of a polymer portion (1) having an acid value of not more than 15 and an acrylic polymer portion (2) having an acid value of 40 to 200, and (C) 3 to 900 parts by weight of a curing agent for curing the component (A) and/or (B).Type: GrantFiled: May 20, 1988Date of Patent: April 30, 1991Assignee: Nippon Paint Co., Ltd.Inventors: Naohito Shingo, Takahito Kishida
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Patent number: 4987167Abstract: A halogen-containing polyester resin composition comprises a flame retardant aromatic polyester copolymer having a halogen content of 0.5-30% by weight which is produced by condensation polymerization reaction of:(A) principally an aromatic dicarboxylic acid or an ester-forming derivative thereof,(B) principally an aliphatic glycol or an ester-forming derivative thereof, and(C) an ester-forming compound containing a halogen,and, in mixture therewith, 0.1-10% by weight of a bisoxazoline compound relative to the total weight of the composition.Type: GrantFiled: February 3, 1988Date of Patent: January 22, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Kenji Hijikata, Makoto Iiyama, Yukihiko Kageyama, Michirou Naka
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Patent number: 4975484Abstract: An improved adhesive composition comprising a nonacidic aqueous latex copolymer of a lower acrylate, an acrylic nitrile and a glycidyl acrylate having a crosslinking agent dissolved in the aqueous phase.Type: GrantFiled: May 1, 1989Date of Patent: December 4, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventors: Michael Fryd, Walter E. Pye, Richard D. Redfearn
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Patent number: 4696962Abstract: A cationic polymer composition suitable for use as a flocculating agent and as a retention aid and dewatering agent in paper making consists of a mixture of(a) a hydrophilic cationic polymer of(a.sub.1) acrylamide and/or methacrylamide and(a.sub.2) dialkylamino-C.sub.2-3 alkylene-(meth)acrylamidethe molar quantity of cationic monomer units (a.sub.2) being from 0.2 to 9 mol % of the total(b) an anionic surfactant(c) a water-immiscible oil in which the polymer (a) is insoluble, andoptionally (d) a lipophilic non-ionic surfactant,optionally (e) waterand optionally (f) an oil-miscible polar solvent.The compositions may be prepared by water-in-oil emulsion copolymerization and are readily diluted with water.Type: GrantFiled: July 24, 1984Date of Patent: September 29, 1987Assignee: Sandoz Ltd.Inventors: Bernard Danner, James R. Ruynon
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Patent number: 4668731Abstract: Dispersion of polyacrylic acid in mineral spirits containing an elastomer that is swellable in mineral spirits, amount of elastomer being sufficient to render the dispersion less resistant to settling of solids.Type: GrantFiled: August 5, 1985Date of Patent: May 26, 1987Assignee: The B. F. Goodrich CompanyInventors: Robert Y. Lochhead, Thomas R. George, Jr., William L. Banks
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Patent number: 4611019Abstract: The addition of small amounts of selected polyamides or polyesters to plasticized, melt extrudable polyvinyl alcohol homopolymer provides a composition with lower permeability to oxygen and other fixed gases.Type: GrantFiled: June 17, 1985Date of Patent: September 9, 1986Inventors: H. Harald Lutzmann, Gerald W. Miller
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Patent number: 4544699Abstract: An adhesive composition, particularly useful for laminating carboxylate-containing films, comprises an aqueous dispersion of a film-forming vinylidene chloride copolymer wherein the vinylidene chloride copolymer includes on a comonomer weight basis:(a) from about 45 to about 90 percent vinylidene chloride,(b) from about 5 to about 25 percent of a polar comonomer having one or more hydroxyl groups, and(c) from about 0 to about 30 percent of a plasticizing monomer for vinylidene chloridein combination with:(d) a cross-linking agent dissolved in the continuous aqueous phase of the vinylidene chloride copolymer.Type: GrantFiled: October 11, 1983Date of Patent: October 1, 1985Assignee: Union Oil Company of CaliforniaInventor: John Biale
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Patent number: 4520172Abstract: What are disclosed are methods for dispersing a powdered salt-forming synthetic resin in water in the presence of an agent forming a salt with said resin, methods for coating pharmaceutical dosage forms with a dispersion made by such a method, and powdered mixtures of a salt forming resin and salt forming agent for dispersion in water.Type: GrantFiled: March 11, 1983Date of Patent: May 28, 1985Assignee: Rohm GmbHInventors: Klaus Lehmann, Dieter Dreher, Hubert Rauch, Werner Siol
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Patent number: 4518738Abstract: This invention relates to a powder for use in dry sensitization for electroless plating, the powder comprising a plastics base material which is a mixture of hydrophobic and hydrophilic plastics materials to which has been added sensitizing particles.Type: GrantFiled: June 4, 1982Date of Patent: May 21, 1985Assignee: NESELCOInventors: Gunnar Sorensen, Leo Svendsen
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Patent number: 4517325Abstract: An improved coating for electrical or magnetic steel core-plates, having corrosion resistance comprises adding to a known combination of organic quaternary ammonium silicate and ethylene/acrylic or ethylene/vinyl acetate copolymer a small amount of a barium, strontium or lead chromate.Type: GrantFiled: October 13, 1983Date of Patent: May 14, 1985Assignee: United States Steel CorporationInventor: Bruno M. Perfetti
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Patent number: 4503193Abstract: This invention relates to polymer dispersions prepared by the in situ polymerization of an ethylenically unsaturated monomer or mixture of monomers in a chain extender in the presence of a free radical polymerization initiator and a polyamide stabilizer.The invention also relates to mixtures of the polymer dispersions with compounds having two or more active hydrogen atoms as determined by the Zerewittinoff method. These mixtures are used to prepare polyurethane products.Type: GrantFiled: April 16, 1984Date of Patent: March 5, 1985Assignee: BASF Wyandotte CorporationInventor: Duane A. Heyman
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Patent number: 4499212Abstract: The invention pertains to sprayable latex polymers produced by step-wise polymerization of ethylenically unsaturated monomers comprising alkylol acrylamide monomer, functional monomers, and other monomers, wherein the alkylol acrylamide monomers are copolymerized in the second stage monomer addition to preferentially locate alkylol acrylamide groups in the surface portion of the latex polymer particles.Type: GrantFiled: January 30, 1984Date of Patent: February 12, 1985Assignee: SCM CorporationInventor: Phillip C. Martino
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Patent number: 4483956Abstract: An acrylic resin article comprising a methyl methacrylate polymer and dibenzylidene sorbitol or its derivative as essential ingredients; and a process for producing an acrylic resin article, which comprises putting a composition comprising a methyl methacrylate monomer or a mixture of a methyl methacrylate polymer and a methyl methacrylate monomer and dibenzylidene sorbitol or its derivative in a mold, and thereafter polymerizing the methyl methacrylate monomer in the composition.Type: GrantFiled: April 19, 1983Date of Patent: November 20, 1984Assignees: E. C. Chemical Ind. Co., Ltd., C. Itoh & Co., Ltd.Inventor: Hiroshi Uchiyama
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Patent number: 4474913Abstract: The present invention describes an advantageous way of lubricating polyvinylchloride during an extrusion process.Type: GrantFiled: April 14, 1983Date of Patent: October 2, 1984Assignee: Henkel CorporationInventor: Robert A. Lindner
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Patent number: 4467060Abstract: A heterogeneous rubber composition having good air impermeability is made by mixing together separate fractions of rubbers and fillers.Type: GrantFiled: January 24, 1983Date of Patent: August 21, 1984Assignee: The B. F. Goodrich CompanyInventor: Biing-Lin Lee
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Patent number: 4463120Abstract: A process for preparing an aqueous adhesive composition which comprises preparing a solvent dispersion by mixing rubber, carbon black, vulcanizing agent, tackifying resin and accelerator with sufficient organic solvent to form a solvent dispersion and thereafter emulsifying the solvent dispersion in the presence of water to form an aqueous emulsion. The aqueous emulsion may be used to bond unvulcanized rubber compounds, such as a tread stock to the carcass portion during the formation of a tire.Type: GrantFiled: January 24, 1983Date of Patent: July 31, 1984Assignee: SWS Silicones CorporationInventors: Wendell Collins, Howard L. Brooks
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Patent number: 4460727Abstract: A water base pigment ink composition for writing comprises a pigment, a dispersing agent, an anti-drying agent and an aqueous medium, in which said dispersing agent is a water soluble amine salt or ammonium salt of a copolymer comprises at least 50 molar % of a hydrophobic addition-polymerizable monomer and less than 50 molar % of acrylic acid or methacrylic acid, and said anti-drying agent is urea, thiourea or a derivative thereof.Type: GrantFiled: October 21, 1982Date of Patent: July 17, 1984Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Sakura Color Products Corp.Inventor: Yukito Shoji
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Patent number: 4458050Abstract: This invention relates to polymer dispersions prepared by the in situ polymerization of an ethylenically unsaturated monomer or mixture of monomers in a chain extender in the presence of a free radical polymerization initiator and a polyamide stabilizer. The invention also relates to mixtures of the polymer dispersions with compounds having two or more active hydrogen atoms as determined by the Zerewittinoff method. These mixtures are used to prepare polyurethane products.Type: GrantFiled: January 24, 1983Date of Patent: July 3, 1984Assignee: BASF Wyandotte CorporationInventor: Duane A. Heyman