Patents Examined by Christopher A. Henderson, Jr.
  • Patent number: 6077912
    Abstract: A method is disclosed for processing a rubber composition comprising thermomechanically mixing at a rubber temperature in a range of 140.degree. C. to 190.degree. C. for a mixing time of 1 to 20 minutes(i) 100 parts by weight of at least one sulfur vulcanizable elastomer selected from conjugated diene homopolymers and copolymers, natural rubber and copolymers of at least one conjugated diene and aromatic vinyl compound;(ii) 10 to 250 phr of particulate precipitated silica;(iii) 0.01 to 1.0 parts by weight per weight of said silica of an organosilicon compound; and(iv) 0.05 to 10 phr of sodium thiosulfate pentahydrate.Addition of the sodium thiosulfate pentahydrate to sulfur vulcanizable rubber, silica and sulfur containing organosilicon compound decreases the mixing/processing time without sacrificing end product properties.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: June 20, 2000
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Richard Michael D'Sidocky, David John Zanzig, Shingo Futamura
  • Patent number: 5534599
    Abstract: A rubber composition comprised of elastomer, silica, a silica coupler, sulfur and, optionally, carbon black, in which the silica, silica coupler and at least a portion of the sulfur are added in a non-productive mix stage.Pneumatic tires having treads comprised of such rubber composition are provided.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: July 9, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Paul H. Sandstrom, David J. Zanzig, Mark S. Sinsky
  • Patent number: 5235016
    Abstract: The invention relates to a composition comprising an emulsion copolymer of an alkyl acrylamido glycolate alkylether, vinyl acetate, and a functional hydroxide containing monomer, a process for its preparation as well as its use as binder, coating, or adhesive, in particular as a self-crosslinking binder composition. The preferred alkyl acrylamido glycolate alkylether is methylacrylamido glycolate methylether (MAGME.RTM.).
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: August 10, 1993
    Assignee: American Cyanamid Company
    Inventors: Abdol-Manaf Vafa, Erik Saly
  • Patent number: 4803260
    Abstract: A recovery method of vinyl chloride resin which comprises formulating an aggregate of vinyl chloride resin by adding to an aqueous dispersion of vinyl chloride resin an organic liquid which is difficultly soluble in water and does not dissolve or swell vinyl chloride resin and mixing the two; dehydrating the aggregate; and drying the same to recover granular vinyl chloride resin, the characteristic feature residing in that said aqueous dispersion is the one which has passed through the screen of 20 to 150-micron meshes.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: February 7, 1989
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Masaaki Nishina, Junsei Kawahuti
  • Patent number: 4742127
    Abstract: Polycarbon sulphide derivatives comprise units (R.sub.x CS.sub.m).sub.n in whichR represents hydrogen, an alkali metal or a transition metal,x is the degree to which R is present in the carbon-sulphur structure,m is the degree of substitution with sulphur andn is the number of units in the polymer chain.As shown by the single FIGURE of the drawing, the insertion of R is reversible.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: May 3, 1988
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Michel Armand, Mireille Fouletier, Pierre Degott
  • Patent number: 4518770
    Abstract: An improved process is provided for the preparation of polyhydroxybutadienes (hydroxy-containing butadiene homopolymers) which comprises injecting an aqueous solution of alkali metal sulfite or bisulfite into the polyhydroxybutadiene solvent recovery section to prevent fouling.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: May 21, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Steven E. Kaplan, Richard C. Frink
  • Patent number: 4423183
    Abstract: The invention herein disclosed provides a method for preparing improved fluoroelastomer film compositions including the steps of dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent, adding an amine-derived curative to the gum solution and curing the fluoroelastomer gum with the curative in the absence of metallic oxides. A method is also provided for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates which includes the steps of dissolving the fluoroelastomer gum in a solvent, adding an amine-derived curative to the gum solution, coating the substrate with the fluoroelastomer gum-curative solution and evaporating the solvent leaving a film firmly adhered to the substrate.
    Type: Grant
    Filed: November 25, 1981
    Date of Patent: December 27, 1983
    Assignee: David Hudson, Inc.
    Inventor: Donald Close
  • Patent number: 4380614
    Abstract: A suspension polymerization of a haloethylene compound or a mixture of a haloethylene compound and a comonomer thereof is carried out in an aqueous medium containing a suspending agent and an oil soluble catalyst, by coating or incorporating at least one of a water soluble or organic solvent soluble lignin derivative.
    Type: Grant
    Filed: January 6, 1981
    Date of Patent: April 19, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kunizoh Kidoh, Hideki Wakamori
  • Patent number: 4346202
    Abstract: The present invention relates to the polymerization of vinyl monomers either alone or copolymerized with ethylenically unsaturated polymerizable monomers having a terminal CH.sub.2 .dbd.C< grouping using a free-radical yielding catalyst or catalyst system, wherein the polymerization reaction is effectively stopped by the addition to the reaction mixture of a shortstopping agent, such as, for example, 4,4'-thiodiphenol (TDP).
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: August 24, 1982
    Assignee: The B. F. Goodrich Company
    Inventor: Louis Cohen
  • Patent number: 4168372
    Abstract: A method for reducing the amount of free vinylidene chloride in an aqueous dispersion of a vinylidene chloride polymer by adding to the dispersion a small amount of a redox initiator, and then subjecting the dispersion to a temperature in the range of room temperature to about 40.degree. C. for a period of at least one hour. Substrates such as packaging films can be coated with the aqueous dispersion, or with a solvent solution of the polymer after separation from the dispersion. By use of such a coating bath, the amount of vinylidene chloride vapor in the atmosphere near the coating station is significantly less than the amount when using a coating bath of polymer not subjected to the method of the invention.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: September 18, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John W. Meier
  • Patent number: 4133947
    Abstract: An improved process for the aqueous emulsion polymerization of vinyl chloride to be spray-dried and thus form paste-yielding polymers wherein the polymerization is conducted in an emulsion containing at least 45% by weight of monomers together with an emulsifying amount of alkali metal fatty acid salts of 8-18 carbon atoms at a pH of 9.5-11.5, and wherein the pH is reduced to a value between 6 and 7.5 prior to spray-drying or to a value between 4 and 7.5 during the spray-drying step.
    Type: Grant
    Filed: July 7, 1976
    Date of Patent: January 9, 1979
    Assignee: Chemische Werke Huels Aktiengesellschaft
    Inventors: Josef Kalka, Hermann Winter, Alfred Kania
  • Patent number: 4124754
    Abstract: A process for making sulfur-modified neoprenes, wherein chloroprene, which may be mixed with up to 20 weight percent of another unsatuated, organic monomer, is polymerized in an aqueous, alkaline emulsion in the presence of about 0.25-0.45 part of sulfur per 100 parts of total organic monomer to a conversion of at most 74%; peptization is initiated by adding to the resulting latex 0.3-1.5 parts of tetraethylthiuram disulfide or another tetraalkylthiuram disulfide, then adding sodium dibutyldithiocarbamate or another water-soluble dialkyldithiocarbamate in a ratio to tetraethylthiuram disulfide of at least 0.8:1; and peptization is contained until it is about 85-95% complete. The polymer then is isolated. Neoprenes made by this process have, when vulcanized, outstanding heat and flex resistance and superior tensile properties, tear strength, and compression set.
    Type: Grant
    Filed: December 14, 1976
    Date of Patent: November 7, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kenneth L. Miller
  • Patent number: 4121033
    Abstract: Chloroprene-sulfur copolymers having improved storage stability are produced by carrying out the emulsion polymerization in the presence of organic polysulfide compounds of the formula. ##STR1## where X, Y and Z are selected from the group consisting of oxygen and sulfur, R.sub.1 is a hydrocarbon radical having from 1 to 8 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 8 carbon atoms or is a radical the same as ##STR2## R.sub.3 and R.sub.4 are selected from the group consisting of hydrocarbon radicals having from 1 to 8 carbon atoms or hydrogen with at least one R.sub.3 and R.sub.4 not being hydrogen and n is 1 to 4.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: October 17, 1978
    Assignee: Denka Chemical Corporation
    Inventor: Morris S. Edmondson
  • Patent number: 4121032
    Abstract: An alternating copolymer of an olefinic unsaturated compound and a conjugated vinyl compound is produced by contacting said monomers with at least one organoboron halide or/and a mixture of at least one organo-compound of metal from Groups IIb, IIIb and IVb of the Mendeleev Periodic Table and at least one halogeno-compound of metal from Groups IIIb and IVb of the Mendeleev Periodic Table. A typical catalyst is ethylboron dichloride or a combination of triethylaluminum and tin tetrachloride.
    Type: Grant
    Filed: April 15, 1975
    Date of Patent: October 17, 1978
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kohei Nakaguchi, Shohachi Kawasumi, Masaaki Hirooka, Hiroshi Yabuuchi, Hiroyoshi Takao
  • Patent number: 4119588
    Abstract: Reversion resistant rubber compositions comprising 100 parts by weight of sulfur vulcanizable rubber(s) of which at least 50 parts by weight are natural rubber and/or cis-polyisoprene, sulfur, a thiocarbamyl sulfenamide accelerator, and optionally a benzothiazole accelerator and/or a thiazole sulfenamide accelerator.
    Type: Grant
    Filed: September 14, 1976
    Date of Patent: October 10, 1978
    Assignee: The B. F. Goodrich Company
    Inventor: John Steven Carpino
  • Patent number: 4117220
    Abstract: Residual vinyl chloride monomer is removed from polyvinyl chloride by subjecting the polymer to microwave radiation in the presence of water.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: September 26, 1978
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Charles H. Worman, Jr.
  • Patent number: 4113710
    Abstract: A process for preparing substantially linear water-soluble interpolymeric interfacially spreading polyelectrolytes, such process comprising (1) a homogeneous polymerization in an aqueous emulsion of a mixture of ethylenically unsaturated nonionic monomers wherein at least one of such monomers contains a reactive group and wherein the polymerization reaction forms an interpolymer containing nonionic functional groups, then (2) adding a coreactant compound to the aqueous emulsion in an amount sufficient to convert the interpolymer to a water-soluble polyelectrolyte having a charge which is the same as the charge of the emulsion of (1) above.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: September 12, 1978
    Assignee: The Dow Chemical Company
    Inventors: Dale M. Pickelman, Sr., Ritchie A. Wessling
  • Patent number: 4112207
    Abstract: Polymers, such as butadiene copolymers and isoprene copolymers, having pendant unsaturated tetra-aliphatic quaternary nitrogen moieties, such as those derived from acrylic esters and acrylamides are useful as water-soluble or inherently water-dispersible curable coatings such as protective and/or decorative coatings, paper coatings, textile fiber coatings, printing plates, photo-curable imagable materials useful as photo-resists, lithographic plates, etc., and the like. Such coatings are curable with light, with high energy radiation and with heat in the presence of free radical catalysts to form insoluble, crosslinked coatings.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: September 5, 1978
    Assignee: The Dow Chemical Company
    Inventor: Giffin D. Jones
  • Patent number: 4112206
    Abstract: Polyvinyl chloride containing certain fluorocarbon surfactants has improved antistatic properties.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: September 5, 1978
    Assignee: Continental Oil Company
    Inventor: James A. Wingrave
  • Patent number: 4110527
    Abstract: An improved method for preparing polyvinyl chloride resins by suspension polymerization wherein the reaction vessel is placed under a limited, selected atmosphere of air, oxygen or nitrogen gas prior to charging starting vinyl chloride monomer material.
    Type: Grant
    Filed: April 30, 1973
    Date of Patent: August 29, 1978
    Assignee: Olin Corporation
    Inventors: Edwin T. Chesler, Donald Goodman, Milton Lapkin