Patents Examined by J. M. Reddick
  • Patent number: 5191008
    Abstract: The present invention relates to a free radical emulsion polymerization process. The latex is prepared by polymerizing (a) at least one conjugated diene, (b) at least one non-carboxylic vinyl aromatic or aliphatic comonomer selected from the group consisting of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, acrylonitrile, methacrylonitrile, vinylidene chloride, ethyl acrylate, butyl acrylate, vinyl pyridine, methylmethacrylate, hexylacrylate, 2-ethyl hexyl acrylate or mixtures thereof, and (c) at least one ethylenically unsaturated carboxylic acid monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, .beta.-carboxyethyl acrylate, itaconic acid or mixtures thereof.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: March 2, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Howard H. Frost, Pamela S. Graham, Ronald D. Fiedler, Ramesh N. Gujarathi
  • Patent number: 5191009
    Abstract: The subject invention discloses a process for producing a neutralized latex that is useful in the manufacture of water reducible coatings which involves:(1) free radical aqueous emulsion polymerizing at a pH of less than about 3.5, a monomer mixture which comprises based on 100 weight percent monomers: (a) from about 45 to about 85 weight percent vinyl aromatic monomers, (b) from about 15 to about 50 weight percent of at least one alkyl acrylate monomer, and (c) from about 1 to about 6 weight percent of at least one unsaturated carbonyl compound; in the presence of about 0.5 to 4.0 phm at least one phosphate ester surfactant; in the presence of about 0.5 to 4.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: March 2, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Sun-Lin Chen, Ramesh N. Gujarathi, Susan M. Prentice
  • Patent number: 5189096
    Abstract: Novel crosslinkable hot-melt adhesive compositions, curable by atmospheric moisture, include (i) the prepolymerizate of an hydroxylated ethylene/vinyl acetate copolymer with a stoichiometric excess of a polyisocyanate, e.g., a diisocyanate, such prepolymerizate containing an effective crosslinkable amount of free isocyanate functional groups, and, optionally, (ii) an adhesive tackifying resin.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: February 23, 1993
    Assignee: Atochem
    Inventors: Jacques Boutillier, Yves Lermat
  • Patent number: 5187226
    Abstract: Vinyl alcohol polymers having a high syndiotacticity and a high degree of polymerization. They are useful as water-resistant films, heat-resistant films, material for high-strength gel and as paper processing agents.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: February 16, 1993
    Assignee: Kuraray Co., Ltd.
    Inventors: Mikiharu Kamachi, Tohei Yamamoto, Toshiaki Sato, Yoshiharu Fukunishi
  • Patent number: 5187210
    Abstract: A high speed corrugating adhesive having a carrier phase comprised of starch, modified starch or dextrin and polyvinyl alcohol in an aqueous emulsion wherein a cold water soluble, partially hydrolyzed, polyvinyl alcohol is used as a starting material. The polyvinyl alcohol is further hydrolyzed in situ to a degree of hydrolysis of more than about 95% by heating it in the presence of water, caustic, and starch, modified starch or dextrin. The carrier phase is admixed with a boron containing compound and a suspension of water and starch to prepare the corrugating adhesive for use in a corrugating machine.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: February 16, 1993
    Assignee: CPC International Inc.
    Inventors: Larry E. Fitt, James J. Pienkowski, Jack R. Wallace
  • Patent number: 5187217
    Abstract: Process for the production of a plasticized polyvinyl butyral particularly used for gluing a base onto glazings. The polyvinyl butyral is obtained by the reaction of a butyric aldehyde with a polyvinyl alcohol, demonstrating a level of hydrolysis greater than 95%, and a viscosity greater than 50 cP, in the presence of an acid catalyst and an emulsifier, the quantity of butyric aldehyde being such that the level of hydroxylation of the polyvinyl butyral obtained is between 22 and 26%.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: February 16, 1993
    Assignee: Saint-Gobain Vitrage
    Inventors: Robert Degeilh, Daniel Dages
  • Patent number: 5185395
    Abstract: Copolymer water-in-oil emulsions of 2-acrylamido-2-methylpropane sulphonic acid (AMPS) monomer and an anionic comonomer such as methacrylic acid are prepared with substantially less coagulum formation by means of a specific dual surfactant system. The resultant emulsions have enhanced long-term storage stability.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: February 9, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Nguyen Van-Det
  • Patent number: 5182326
    Abstract: The invention is pigment grinding aids for water-based inks which are produced by reacting an unsaturated fatty acid and/or resin acid with either acrylic acid, metacrylic acid, fumaric acid, or maleic anhydride to form a polycarboxylic acid anhydride. The polycarboxylic acid anhydride is reacted with an excess of polyamine to produce an amidoamide or imidoamide intermediate. This intermediate is reacted with either acrylic acid or methacrylic acid to produce the grinding aid.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: January 26, 1993
    Assignee: Westvaco Corporation
    Inventors: Paul J. LeBlanc, Peter Schilling
  • Patent number: 5180753
    Abstract: Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20 C in combination with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: January 19, 1993
    Inventors: Lloyd I. Osipow, Dorothea C. Marra, J. George Spitzer
  • Patent number: 5177154
    Abstract: A water compatible terpolymer for sealing and coating building materials which protects surfaces from environmental staining agents. The terpolymer is created by polymerizing a HEMA:SMA co-polymer with another monomer which contains either free acid or base groups. The resultant terpolymer is water solution after neutralization. Water is then added to bring the solvent level to 40% maximum and the solids level to 8%.
    Type: Grant
    Filed: April 30, 1991
    Date of Patent: January 5, 1993
    Assignee: National Patent Development Corp.
    Inventor: Daniel G. Moro
  • Patent number: 5177123
    Abstract: Self-lubricating polyacetal resin compositions and molded articles (e.g. "wear parts") formed thereof include a polyacetal base resin, and a self-lubricating effective amount of a silica powder in which a silicone polymer (e.g. silicone oil) is absorbed. The silica powder acts as a carrier for the silicone polymer so as to improve the dispersibility of the silicone polymer in the polyacetal base resin as well as to allow greater silicone polymer "loading" of the polyacetal base resin. As a result, improved lubricant dispersibility and sliding characteristics are achieved.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: January 5, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Katsunori Takayama, Toshihiko Endo, Osamu Kanoto, Nobuyuki Matsunaga
  • Patent number: 5175205
    Abstract: A latex system can be made from a combination of acids in a base monomer wherein methylenesuccinic acid is used with at least one other monocarboxylic acid.The latex system provides a high pH latex that can be used to treat fiber substrates or alternatively can be blended with other latexes to form coatings.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: December 29, 1992
    Assignee: The B. F. Goodrich Company
    Inventor: Philip Y. Yang
  • Patent number: 5174929
    Abstract: A dimensionally stable hydrogel contact lens of polyvinyl alcohol having an equilibrium water content of between about 70 to about 80 weight percent, based upon the total swollen lens weight, said lens having been annealed in a mold essentially conforming to the contact lens dimensions under substantially ambient non-drying setting conditions in the presence of an aqueous-organic annealing promoter solvent, for a period of time substantially sufficient to reach annealing equilibrium.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: December 29, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert A. Janssen, Ping I. Lee, Ellen M. Ajello
  • Patent number: 5173535
    Abstract: Plastic materials having distributed therein discrete particles of crosslinked polymers having functional material entrapped within the polymer lattices during the in situ polymerization of the monomers forming the polymer for the purpose of a controlled release of the functional material.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: December 22, 1992
    Assignee: Dow Corning Corporation
    Inventor: Eric S. Abrutyn
  • Patent number: 5171768
    Abstract: The present invention relates to a free radical emulsion polymerization process. The latex is prepared by polymerizing (a) at least one conjugated diene, (b) at least one non-carboxylic vinyl aromatic or aliphatic comonomer selected from the group consisting of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toleuene, acrylonitrile, methacrylonitrile, vinylidene chloride, ethyl acrylate, butyl acrylate, vinyl pyridine, methylmethacrylate, hexylacrylate, 2-ethyl hexyl acrylate or mixtures thereof, and (c) at least one ethylenically unsaturated carboxylic acid monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, 3-carboxyethylacrylate, itaconic acid or mixtures thereof.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: December 15, 1992
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Susan M. Prentice, Ramesh N. Gujarathi, Sun-Lin Chen
  • Patent number: 5171781
    Abstract: Water absorbent particulate polymers and their uses are described. Friable aggregates may be made by bonding substantially dry polymer particles with an aqueous liquid and drying the aggregates. These aggregates can be broken down to the individual polymer particles upon mixing with an aqueous medium and thus can have the flow properties of relatively coarse particles and the performance properties of relatively fine particles. They may be soluble nd used as flocculants or viscosifiers or binders for, for instance, iron ore pelletisation. Alternatively they may be swellable and insoluble, for instance for converting a sticky particulate mass (such as coal fines filter cake) to a crumbly solid.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: December 15, 1992
    Assignee: Allied Colloids Limited
    Inventors: David Farrar, John R. Field, Peter Flesher
  • Patent number: 5171785
    Abstract: A pellicle film comprised of a resin prepared by reducing a polyvinyl acetal of the formula: ##STR1## wherein R is a C1-3 alkyl group and the vinyl acetate content "y/(x+y+z)" is not larger than 0.1 and the degree of acetalization "z/(x+y+z)" is at least 0.6. This pellicle film exhibits a reduced UV absorption in the vicinity of 365 nm and is durable against irradiation with UV rays, especially i-line of a mercury arc light.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: December 15, 1992
    Assignee: Tosoh Corporation
    Inventors: Takashi Yamamoto, Katsuya Shibata, Tatsuki Suzuki, Toru Seita
  • Patent number: 5169897
    Abstract: Novel binary acetal polymers are comprised of recurring units which include two six-membered cyclic acetal groups, one of which is unsubstituted or substituted with an alkyl or hydroxyalkyl group and the other of which is substituted with an aromatic or heterocyclic moiety. The binary acetal polymers are advantageously employed in photosensitive compositions in which they are utilized in combination with diazo resins. Such photosensitive compositions are especially well adapted for use in lithographic printing plates which can be developed with aqueous developing solutions.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: December 8, 1992
    Assignee: Eastman Kodak Company
    Inventor: John E. Walls
  • Patent number: 5169898
    Abstract: Novel acid-substituted ternary acetal polymers are comprised of recurring units which include three six-membered cyclic acetal groups, one of which is unsubstituted or substituted with an alkyl or hydroxyalkyl group, another of which is substituted with an aromatic or heterocyclic moiety, and a third of which is substituted with an acid group, an acid-substituted alkyl group or an acid-substituted aryl group. The acid-substituted ternary acetal polymers are advantageously employed in photosensitive compositions in which they are utilized in combination with diazo resins. Such photosensitive compositions are especially well adapted for use in lithographic printing plates which can be developed with aqueous developing solutions.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: December 8, 1992
    Assignee: Eastman Kodak Company
    Inventors: John E. Walls, Larry D. LeBoeuf
  • Patent number: 5166263
    Abstract: Provided is a polyvinyl alcohol having a triad isotacticity of at least 72% and an intrinsic viscosity of at least 0.1 dl/g (deciliter/gram) as determined by measurement of solution viscosity in acetone at 30.degree. C. of the polyvinyl acetate obtained by acetylation thereof. The polyvinyl alcohol of the present invention has a crystalline structure different from those of conventional isotactic polyvinyl alcohols and, as a result, exhibit excellent characteristics including high crystallinity and high melting point, as well as markedly high water resistance and thermal resistance. It has use as a high-strength fiber, high-water-resistant fiber, thermally resistant fiber and thermally resistant film.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: November 24, 1992
    Assignee: Kuraray Co., Ltd.
    Inventors: Hiroyuki Ohgi, Toshiaki Sato