Patents Examined by N. Sarofim
  • Hydroxy-functional allyl terpolymers
    Patent number: 5543483
    Abstract: Hydroxy-functional allyl terpolymers are disclosed. The terpolymers comprise recurring units of an allyl ester, an allylic alcohols or propoxylated allylic alcohol, and a vinyl monomer. The high hydroxyl group content and favorable solubility characteristics make the terpolymers easy to formulate into many polymer products, including polyurethanes, polyesters, melamines, alkyds, uralkyds, and other thermoset polymers.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: August 6, 1996
    Assignee: ARCO Chemical Technology, L.P.
    Inventor: Shao-Hua Guo
  • Golf ball cover compositions
    Patent number: 5542677
    Abstract: The present invention is directed to golf ball cover compositions containing blends of high or low carboxylic acid based copolymers and ethylene copolymers such as ethylene alkyl acrylates. The carboxylic acid groups of the blends are neutralized with metal cations. Golf balls produced with the cover molded thereon exhibit desired properties of distance and high coefficient of restitution without substantially sacrificing and/or improving characteristics like playability and durability when compared to existing covers comprising ionomeric resin blends.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: August 6, 1996
    Assignee: Lisco, Inc.
    Inventors: Michael J. Sullivan, Robert A. Weiss
  • Method for preparing poly(vinyl trifluoroacetate) and poly(vinyl trifluoroacetate/vinyl ester) in the absence of chlorofluorocarbon solvent
    Patent number: 5541273
    Abstract: A method for the production of poly(vinyl trifluoroacetate) and copolymers thereof with vinyl esters is described. Poly(vinyl trifluoroacetate) (PVTFA) is obtained in essentially quantitative yield under mild conditions by using non-chlorofluorocarbon solvents comprising siloxanes or perfluorinated fluid. Hexamethyl disiloxane is a particularly useful example of such solvents. Synthesis of syndiotactic PVTFA on a commercial scale without the use of environmentally-harmful solvents is made possible by the invention, which provides a convenient commercial route to syndiotactic polyvinyl alcohol.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: July 30, 1996
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventor: Gilbert L. Eian
  • Fabric laminates
    Patent number: 5539072
    Abstract: Laminates of fabric and microporous polymeric substrates are taught which have enhanced oleophobic and hydrophobic properties. The enhanced properties are obtained by contacting the laminate or any of its components with an aqueous dispersion of polymer particles of an organic polymer having pendent fluorinated alkyl groups and in which the particles are very small, being on the order of 0.01-0.1 micrometer. The small size promotes uniformity of coating when the laminate or components are coated with the dispersion and then heated to flow the particles together.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: July 23, 1996
    Assignee: W. L. Gore & Associates, Inc.
    Inventor: Huey S. Wu
  • Repulpable pressure-sensitive adhesive compositions
    Patent number: 5536787
    Abstract: A water-dispersible, inherently tacky pressure-sensitive adhesive comprising a tacky emulsion polymer formed of from about 80% to 90% by weight of monomers comprising a major portion of at least alkyl acrylate containing from 4 to about 8 carbon atoms in the alkyl group and from about 20% to 10% by weight of a mixture of acrylic acid with at least an oleophilic unsaturated carboxylic acid, said emulsion polymer formed in the presence of anionic and nonionic surfactants to provide a polymer having a glass transition temperature of -15.degree. to -50.degree. C. A sufficient amount of chain transfer agent is employed to provide an emulsion polymer which when coated on a repulpable paper substrate enables recovery of paper fibers substantially free of adhesive under conditions of TAPPI Useful Method 213 and/or 204, and resistant to loss of adhesive properties on exposure to high humidity.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 16, 1996
    Assignee: Avery Dennison Corporation
    Inventors: William F. Scholz, Robert H. Van Ham, Richard P. Randall
  • Repulpable pressure-sensitive adhesive compositions
    Patent number: 5536800
    Abstract: A water-dispersible, inherently tacky pressure-sensitive adhesive comprising a tacky emulsion polymer formed of from about 80% to 90% by weight of monomers comprising a major portion of at least alkyl acrylate containing from 4 to about 8 carbon atoms in the alkyl group and from about 20% to 10% by weight of a mixture of acrylic acid with at least an oleophilic unsaturated carboxylic acid, said emulsion polymer formed in the presence of anionic and nonionic surfactants to provide a polymer having a glass transition temperature of -15.degree. to -50.degree. C. A sufficient amount of chain transfer agent is employed to provide an emulsion polymer which when coated on a repulpable paper substrate enables recovery of paper fibers substantially free of adhesive under conditions of TAPPI Useful Method 213 and/or 204, and resistant to loss of adhesive properties on exposure to high humidity.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: July 16, 1996
    Assignee: Avery Dennison Corporation
    Inventors: William F. Scholz, Robert H. Van Ham, deceased, Louis C. Van Ham, legal representative, Richard P. Randall, legal representative
  • Polyethylene with reduced melt fracture
    Patent number: 5534572
    Abstract: The present invention relates to a polyolefin composition, having good extrusion characteristics. The composition comprises a fluoropolymer; one or more of a low molecular weight C.sub.1-4 alkyl ethers of a poly C.sub.2-4 alkylene oxide; and a metal oxide the weight ratio of the ether to fluoropolymer being less than 1:1. The blend is suitable for making blown film.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: July 9, 1996
    Assignee: Novacor Chemicals Ltd.
    Inventors: Joseph W. Taylor, Shivendra K. Goyal, Norman D. J. Aubee, Nick K. K. Bohnet
  • Preparation of a modified polytetrafluoroethylene and use thereof
    Patent number: 5530078
    Abstract: Polymerizing tetrafluoroethylene with modifying amounts of a perfluoro(alkyl vinyl ether) at temperatures below 60.degree. C. using permanganate or similar initiators by the suspension process and milling the raw polymer to an average particle size of from 10 to 50 .mu.m gives molding powders which are suitable for the preform free-sintering technique.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: June 25, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Bernd Felix, Klaus Hintzer, Gernot Lohr
  • Multi-phase polymerization process
    Patent number: 5527865
    Abstract: The present invention provides a multi-phase polymerization process for making a water insoluble polymer. The process includes (1) providing a mixture comprising carbon dioxide and an aqueous phase, and containing a monomer and a polymerization initiator, and (2) polymerizing the monomer in the reaction mixture. The monomer may be a hydrocarbon or a fluorinated monomer. The polymerization initiator may be soluble in the aqueous phase, soluble in carbon dioxide, or insoluble in both the aqueous phase and carbon dioxide, such that the initiator forms a separate phase.The present invention also provides multi-phase polymerization reaction mixtures useful in the process of making water insoluble polymers.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: June 18, 1996
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Compolymer of styrene and silane coupling agent and synthesizing method thereof and method for improving adhesion performance in fiber reinforced polystyrene composites by using the compolymers
    Patent number: 5525677
    Abstract: Novel agents for improving adhesion performance between fibers and resins in fiber reinforced polystyrene composites and synthesizing method thereof and method for improving adhesion performance in fiber reinforced polystyrene composites by using the copolymers are disclosed.The agents are copolymers of styrene and silane coupling agents, and the copolymers can be manufactured by copolymerizing styrene monomer and silane coupling agents in benzene solvent at nitrogen atmosphere by employing azobisisobutyronitrile (AIBN) and the like as an initiator after purifying the reactants and eliminating polymerization inhibitor from the reactants.The typical copolymer is poly(styrene-co-.gamma.-MPS)(.gamma.-MPS means .gamma.-methacryloxypropyltrimethoxysilane) which is manufactured by copolymerizing styrene monomer and .gamma.-MPS.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: June 11, 1996
    Assignee: Dongbu Chemical Co., Ltd.
    Inventors: Jongkoo Jeong, Jyongsik Jang, Junyup Lee
  • Process for the preparation of an acrylonitrile copolymer and product prepared therefrom
    Patent number: 5523366
    Abstract: A process for the rapid precipitation polymerization of acrylonitrile and a minor amount of a vinyl carboxylic acid comonomer in an environment of less than 10 ppm metal-ions to produce an acrylonitrile copolymer which, when pyrolyzed in an oxidizing atmosphere, produces a high quality carbon fiber.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: June 4, 1996
    Inventor: Kenneth Wilkinson
  • Poly(para-T-butoxycarbonyloxystyrene) and method of making
    Patent number: 5523370
    Abstract: Provided is a poly(para-t-butoxycarbonyloxystyrene) having recurring units of the formula: ##STR1## which is prepared by anionic polymerization of para-t-butoxycarbonyloxystyrene. The polymer is of a controlled molecular weight and a narrow molecular weight distribution and has a high degree of resolution and development, meeting the requirements of resist materials. The method allows for simple preparation of such polymers.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: June 4, 1996
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Osamu Watanabe, Toru Nakanishi, Tomoyoshi Furihata, Motoyuki Yamada, Fujio Yagihashi
  • Antimicrobial polymer, contact lens and contact lens-care articles
    Patent number: 5520910
    Abstract: An antimicrobial polymer obtained by homo- or copolymerizing a phosphonium salt type vinyl monomer, such as 2-(methacrylic acid) ethyltri-n-octylphosphonium chloride, and a contact lens and an article for its care mainly comprising an antimicrobial resin obtained by copolymerizing a polymerizable monomer and a phosphonium salt type vinyl monomer are disclosed. The antimicrobial polymer has a broad antimicrobial spectrum and produces a sufficient antimicrobial effect after a short contact time. The contact lens and article for its care are hardly effected by contamination with microorganisms while retaining excellent optical performance and processability.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: May 28, 1996
    Assignees: Nippon Chemical Industrial, Seiko Epson Corporation
    Inventors: Kazukichi Hashimoto, Yoshiko Inaba, Seiji Shimura, Takao Mogami, Tadao Kojima, Yoichi Ushiyama
  • Adhesion of high-melting perfluoroplastic materials
    Patent number: 5518563
    Abstract: A process for adhering high-melting perfluoroplastic materials is disclosed, which process comprises swelling a material comprised of a first perfluoropolymer with a solution of a second lower-melting perfluoropolymer, and then adhering the material to a substrate with an interlayer of the same second perfluoropolymer. The final assembly, as well as intermediate assemblies or compositions which can be made and stored, are also disclosed.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: May 21, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Martin G. Wagner
  • Allyl ester copolymers with allylic alcohols or propoxylated allylic alcohols
    Patent number: 5519103
    Abstract: Allyl ester copolymers with allylic alcohols and propoxylated allylic alcohols are disclosed. The high primary hydroxyl group content and favorable solubility characteristics make the allyl ester copolymers easy to formulate into many polymer products, including polyurethanes, polyesters, melamines, alkyds, uralkyds, and crosslinked polymeric resins.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: May 21, 1996
    Assignee: Arco Chemical Company
    Inventor: Shao-Hua Guo
  • Method of producing water-soluble cationic copolymers
    Patent number: 5516852
    Abstract: A method of preparing a high molecular weight water-soluble cationic copolymer by reacting in an aqueous solution at least one N-vinylamide and at least one cationic quaternary amine monomer in the presence of a free radical initiator and a salt of ethylenediamine tetraacetic acid and subjecting the formed polymer to an acid or base to form an N-vinylamide/N-vinylamine/cationic quaternary amine copolymer product.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: May 14, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Roger Y. Leung, Kenneth S. Williams
  • Multi-phase polymerization process
    Patent number: 5514759
    Abstract: The present invention provides a multi-phase polymerization process for making a water insoluble polymer. The process includes (1) providing a mixture comprising carbon dioxide and an aqueous phase, and containing a monomer and a polymerization initiator, and (2) polymerizing the monomer in the reaction mixture. The monomer may be a hydrocarbon or a fluorinated monomer. The polymerization initiator may be soluble in the aqueous phase, soluble in carbon dioxide, or insoluble in both the aqueous phase and carbon dioxide, such that the initiator forms a separate phase.The present invention also provides multi-phase polymerization reaction mixtures useful in the process of making water insoluble polymers.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: May 7, 1996
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Timothy Romack
  • Heterogeneous polymerization in carbon dioxide
    Patent number: 5506317
    Abstract: The heterogeneous polymerization of water-insoluble polymer in CO.sub.2 is disclosed. The method comprises providing a heterogeneous reaction mixture comprising CO.sub.2, a monomer, and a surfactant, then polymerizing the monomer to form a water-insoluble polymer.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: April 9, 1996
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Joseph M. DeSimone, Elise E. Maury, James R. Combes, Yusuf Z. Menceloglu
  • Aqueous microemulsion polymerization of tetrafluoroethylene
    Patent number: 5504170
    Abstract: Polytetrafluoroethylene (PTFE) structures are described which are prepared by polymerizing liquid tetrafluoroethylene in an aqueous microemulsion region to obtain small particles of PTFE.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: April 2, 1996
    Assignee: W. L. Gore & Associates, Inc.
    Inventor: Huey S. Wu
  • Polymerization process in aqueous emulsion of fuluorinated olefinic monomers
    Patent number: 5498680
    Abstract: In a process of (co)polymerization in aqueous emulsion of fluorinated olefinic monomers it is added to the reaction medium a microemulsion of fluoropolyoxyalkylenes having hydrogenated end groups and/or hydrogenated repetitive units. A remarkable reduction in the reaction induction period is so obtained, with formation of a product with improved mechanical properties and higher thermal and chemical resistance.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: March 12, 1996
    Assignee: Ausimont S.p.A.
    Inventors: Julio A. Abusleme, Patrizia Maccone