Patents Examined by Jacob Ziegler
  • Patent number: 5272207
    Abstract: A process is discontinuously preparing continuously tapered SBR-type copolymers optionally having a continuous change in microstructure along the polymer. The process produces tapered block copolymers with multiple glass transition temperatures of very small energy absorption, i.e. no definable glass transition temperature.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: December 21, 1993
    Assignee: Bridgestone Corporation
    Inventors: James E. Hall, David M. Roggeman
  • Patent number: 5237002
    Abstract: A novel thermoplastic resin composition excellent in heat resistance, impact resistance, hardness is provided which comprises 100 parts by weight of a composition comprising (A) 5-95% by weight of a polyphenylene ether prepared by oxidation polymerization of at least one phenol compound represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 which may be identical or different and represent a hydrogen atom, a halogen atom, a substituted or unsubstituted hydrocarbon residue, with a proviso that at least one of them is a hydrogen atom and (B) 95-5% by weight of a polyamide and 5-100 parts by weight of (C) a copolymer of an ethylene-.alpha.-olefin copolymer rubber with an alkenyl aromatic compound and an unsaturated carboxylic acid or its anhydride. This composition may further contain 0.01-30 parts by weight of an epoxy compound (D) for 100 parts by weight of the composition of (A) and (B).
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: August 17, 1993
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Taichi Nishio, Hideyuki Kuribayashi, Takashi Sanada
  • Patent number: 5234994
    Abstract: A thermoplastic polymer composition(a) 10 to 95 parts by weight of a block copolymer which comprises at least two polymer segments comprised primarily of a vinyl aromatic hydrocarbon and at least one polymer segment comprised primarily of a conjugated diene, in which:(i) the content of the vinyl aromatic hydrocarbon is more than 60% by weight and 95% by weight;(ii) the weight ratio of the vinyl aromatic hydrocarbon present in the copolymer as the vinyl aromatic hydrocarbon polymer block to the total vinyl aromatic hydrocarbons present in the copolymer is more than 0.75% to 0.98%; and(iii) the ratio of the weight average molecular weight to the number average molecular weight of the vinyl aromatic hydrocarbon polymer block in the copolymer is 1.2 to 2.0 and(b) 5 to 90% by weight of polyphenylene ether, and, optionally,(c) 3 to 400 parts by weight, based on 100 parts by weight of the total weight of said components (a) and (b), of polystyrene.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: August 10, 1993
    Assignee: Asani Kasei Kogyo Kabushiki Kaisha
    Inventors: Toshinori Shiraki, Yasuo Hattori, Susumu Hoshi, Haruhisa Nagano
  • Patent number: 5229441
    Abstract: A composition useful in copying and printing is described. In one embodiment, the composition comprises a purified fraction of uintaite and a thermoplastic polymer. Preferably, the composition comprises a maltene-enriched fraction of uintaite derived by solvent extraction, a thermoplastic polymer and a colorant. In another embodiment, the present invention is an electrophotographic method comprising the steps of generating a latent electrostatic image; developing said latent image with a toner comprising a purified fraction of uintaite; and fixing said toner. The present invention is also a printing ink emulsion comprising a maltene-enriched fraction of uintaite.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: July 20, 1993
    Assignee: American Gilsonite Company
    Inventors: Enrique E. Romagosa, John F. Cooper
  • Patent number: 5229206
    Abstract: Adhesive composition comprising a blend consisting essentially of (1) an adhesive composition comprising a tacky pressure-sensitive adhesive, said adhesive preferably selected from rubber-based adhesives, e.g., the thermoplastic elastomers, and (2) a pressure-sensitive adhesive composition comprising a polymer having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4 to about 12, and grafted to the backbone, polymeric moieties having a Tg greater than about C. and a weight average molecular weight above about 2,000. The pressure-sensitive adhesive of adhesive composition (1) has moieties, e.g., blocks or grafts, that associate with the polymeric moieties grafted to the backbone of the polymer of adhesive composition (2).
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: July 20, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: James D. Groves
  • Patent number: 5227098
    Abstract: A material is described for preventing the occurrence of damage to the backwall of a cavity within a component during laser drilling of holes into said component. The material comprises an acrylic resin having polytetrafluoroethylene dispersed within it. A method for preventing such backwall damage occurring during laser drilling using this material is also described.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: July 13, 1993
    Assignee: AE Turbine Components Limited
    Inventors: Jonathon D. Philby, Glyndwyr J. Davies
  • Patent number: 5227419
    Abstract: A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the first monomer to produce a polymodal tapered block copolymer. Suitable monomers include conjugated dienes and monovinylaromatic compounds. The copolymers are particularly useful for applications requiring environmental stress crack resistance.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: July 13, 1993
    Assignee: Phillips Petroleum Company
    Inventors: George A. Moczygemba, William J. Trepka
  • Patent number: 5225492
    Abstract: The synthesis of poly(isobutylene-b-methyl vinyl ether) (PIB-b-PMeVE) by living carbocationic polymerization (LC.sym.Pzn) employing the sequential monomer addition (SMA) technique is described. The process starts by producing the living PIB.sym. block employing the 2-chloro-2,4,4-trimethylpentane (TMPC11/TiCl.sub.4 initiating system in the presence of the common ion salt tetra-n-butylammonium chloride (n-Bu.sub.4 NCl) in CH.sub.3 Cl/n-C.sub.6 H.sub.14 or CH.sub.2 Cl.sub.2 /n-C.sub.6 H.sub.14 mixed solvents at C. and continues by the addition of methyl vinyl ether (MeVE). The second living block forms only in the presence of excess TiCl.sub.4 suggesting that the species that starts the second block and subsequently sustains its growth is a MeVE.multidot.TiCl.sub.4 complex. The stoichiometry of this complex (1:1 or 1:2) is uncertain. The TiCl.sub.4 remains attached to the MeVE units after their incorporation into the diblock, however, it can be readily removed by water.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: July 6, 1993
    Assignee: The University of Akron
    Inventors: Joseph F. Kennedy, Tibor Pernecker, Bela Ivan
  • Patent number: 5225483
    Abstract: A thermoplastic composition is provided which comprises a blend of a thermoplastic, such as a copolymer of styrene and maleic anhydride; polypropylene; a modified elastomeric component, such as EPM or EPDM, which has been modified with a specified functional monomer, such as a 2-substituted-5-norbornene, and an amine-modified maleic anhydride grafted polypropylene. The composition has improved properties.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: July 6, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Sudhin Datta, Narayanaswami R. Dharmarajan, Jean M. Dekoninck, Donald A. White
  • Patent number: 5223574
    Abstract: Polymer blends are provided comprising a glassy thermoplastic polymer having a glass transition temperature above ambient conditions, e.g., normal room temperature and between 0.1 and 4.0 weight percent of a rubbery polymer having a glass transition temperature below ambient temperature conditions, e.g., normal room temperature based on the weight of the blend. The blends can be produced by solution casting or by coagulation from solution followed by flocculation.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: June 29, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Osman S. Gebizlioglu, Robert E. Cohen, Ali S. Argon, Haskell W. Beckham, Jian Qin
  • Patent number: 5222739
    Abstract: The present invention provides a golf ball having excellent impact resilience and good flying performance, which comprises a core and a cover covering the core, wherein the cover contains at least 20 % by weight of a carboxyl-rich ionomer resin prepared by neutralizing 15 to 80 mol % of carboxylic acid groups of an olefinic copolymer containing 16 to 30 % by weight of an alpha, beta-ethylenic unsaturated carboxylic acid with monovalent or divalent metal ions.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: June 29, 1993
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Kuniyasu Horiuchi, Seiichiro Endo
  • Patent number: 5223553
    Abstract: An antistatic resin composition which is the electron radiation cured reaction product of an electron radiation curable prepolymer and an electron radiation reactive antistatic agent soluble in the prepolymer. An antistatic laminate is made by applying a mixture of the prepolymer and antistatic agent to a substrate and then contacting the mixture with electron radiation.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: June 29, 1993
    Assignee: Metallized Products, Inc.
    Inventor: Allen H. Keough
  • Patent number: 5221716
    Abstract: The subject invention relates to comb polymers having a halobutyl rubber backbone and to techniques for synthesizing such polymers. The comb polymers of this invention can be thermoplastic elastomers. For instance, halobutyl rubbers having sidechains which are derived from vinyl aromatic monomers are thermoplastic elastomers which can be made by a technique of the subject invention. Such thermoplastic elastomers typically have a chlorobutyl rubber backbone and side chains which are comprised of polystyrene. The subject invention more specifically discloses a process for grafting a lithium terminated vinyl aromatic polymer onto a halobutyl rubber which comprises: (1) capping the lithium terminated vinyl aromatic polymer with a diene monomer to produce a lithium terminated diene capped vinyl aromatic polymer, and (2) reacting the lithium terminated diene capped vinyl aromatic polymer with the halobutyl rubber to produce a halobutyl rubber having vinyl aromatic sidechains grafted thereto.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: June 22, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: George Jalics, Richard G. Bauer
  • Patent number: 5219951
    Abstract: Process for the manufacture of modified polyphenylene ether or structurally related polymers comprising:the reaction of polyphenylene ether or structurally related polymer with a non-cyclic acid anhydride, in the presence of a pyridine derivative substituted by an amine group as catalyst, and in a vinyl substituted aromatic monomer as solvent;modified polyphenylene ethers so obtained and use of them for the manufacture of modified high temperature rigid poly(vinyl substituted aromatic) polymer compositions.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: June 15, 1993
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Laurentius N. I. H. Nelissen, Johannes M. Zijderveld
  • Patent number: 5219944
    Abstract: An all season tire tread rubber blend comprises about 30 to 50 parts per hundred low vinyl polybutadiene; about 25 to 60 parts per hundred natural rubber and/or synthetic polyisoprene; and about 10 to 25 parts per hundred high styrene styrene/butadiene rubber and/or other diene polymer having a glass transition temperature of about to about C. A preferred embodiment comprises about 40 parts per hundred low vinyl solution polybutadiene, about 40 parts per hundred natural rubber, and about 20 parts per hundred high styrene solution styrene/butadiene. Tires employing the tire tread rubber of this invention exhibit improved wet and winter traction and superior abrasion resistance and treadwear without increased rolling resistance.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: June 15, 1993
    Assignee: Pirelli Armstrong Tire Corporation
    Inventors: Richard M. Scriver, Tomasz S. Mroczkowski, Shailesh D. Patkar
  • Patent number: 5219935
    Abstract: A composition universally usable as an impact modifier for synthetic resins comprising(A) from 10 to 80 percent by weight of a polymer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, R.sub.2 is C.sub.5 -C.sub.7 cycloalkyl or such cycloalkyl substituted by C.sub.1 -C.sub.12 alkyl, y has a value such that the corresponding monomer or monomers are from 5 to 50 percent by weight of polymer (A), and x has a value such that the corresponding monomer, together with up to 20 percent by weight of one or more optional comonomers, is the balance by weight, and(B) from 20 to 90 percent by weight of an optionally crosslinked polymer having a glass transition temperature, T.sub.g, below C. and preferably less than C., polymer (B) being at least partially bonded covalently to polymer (A).
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: June 15, 1993
    Assignee: Rohm GmbH
    Inventors: Werner Siol, Jens-Dieter Fischer, Klaus Koralewski, Ulrich Terbrack
  • Patent number: 5219945
    Abstract: This application discloses linear methacrylic ABC triblock polymers in which the composition of each of the three blocks is different and wherein at least one of the blocks is hydrophobic and at least one of the blocks is hydrophilic.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ira B. Dicker, Walter R. Hertler, Sheau-Hwa Ma
  • Patent number: 5219937
    Abstract: A process of forming block and/or graft copolymers of a polyester and a polyphenylene oxide which comprises heating a mixture of the polyester and the polyphenylene oxide in the presence of a phosphite compound.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: June 15, 1993
    Assignee: AlliedSignal Inc.
    Inventors: Reginald T-H. Tang, Michael C. Bochnik, Frank Mares, Steve Arnold
  • Patent number: 5219948
    Abstract: Elastomeric polymers comprising polymerized alpha-olefins or conjugated alkadienes are produced by cationic polymerization in the presence of titanium tetrachloride and an electron pair donor selected from pyridine or a non-hindered alkylpyridine. The polymers have very narrow, mono-modal molecular weight distributions such a achived by anionic polymerization. Polymerization of each monomer is terminated prior to broadening of the molecular weight distribution which significantly detracts from polymer properties.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: June 15, 1993
    Assignee: University of Southern Mississippi
    Inventors: Robson F. Storey, Youngkwan Lee, Bret J. Chisholm
  • Patent number: RE34364
    Abstract: Aryloxytriazine-capped polyphenylene ethers are prepared by reaction of a polyphenylene ether with an aryloxychlorotriazine such as diphenyl chlorocyanurate. The products undergo reaction with amine-terminated polymers such as polyamides, to form compositions which have excellent properties and which find utility as molding compositions and as compatibilizers for blends of similar polymers.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: August 31, 1993
    Assignee: General Electric Company
    Inventor: Sterling B. Brown