Patents Examined by C Henderson
  • Method for removing hydrogenation catalyst residues from hydrogenated conjugated diene polymers
    Patent number: 4396761
    Abstract: A process is disclosed for removing hydrogenation catalyst residues from hydrogenated conjugated diene polymers by contacting a hydrocarbon solution of said polymers with an aqueous dilute solution of an alpha-hydroxysulfonic acid, separating the aqueous phase from the hydrocarbon phase, removing the hydrocarbon solvent from the hydrocarbon phase, producing a solid polymer, and applying heat and/or vacuum to the solid polymer to remove the residual alpha-hydroxysulfonic acid.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: August 2, 1983
    Assignee: Shell Oil Company
    Inventors: Carl L. Willis, Lynn H. Slaugh
  • Process for synthesizing silylated polyalkenamers
    Patent number: 4396750
    Abstract: A process for polymerizing cycloalkenes into polyalkenamers is described wherein trisubstituted silyl groups are attached to the cycloalkenes. The silyl groups thus attached do not act as a poison to the polymerization process. Trimethylsilyl group can be substituted by other desired functional groups after the polymerization.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: August 2, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Thomas J. Katz, Michael A. Shippey
  • Composition for preventing plate out in extrusion equipment
    Patent number: 4394501
    Abstract: A composition of polyvinylchloride containing the usual additives and a plate out preventing, chemically or physically acting drying agent. The drying agent is preferably an expanded and finely ground aluminiumsilicate, having a high oil absorption and water absorption and preferably low amounts of earth alkaline metals. The plate out preventing drying agent is incorporated in a normal additive composition in order to avoid handling of voluminous masses of drying agent. This incorporation is executed by mixing with a mixture of additives or during the chemical reaction for preparing the additive composition.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: July 19, 1983
    Assignee: Wavin B.V.
    Inventors: Walfrida G. E. Kuibers-Kiewik, Johannes Akkerman, Johan Gons
  • Method for stabilizing an acrylamide polymer in a petroleum recovery process
    Patent number: 4393163
    Abstract: 2-Mercaptobenzoimidazole or its water-soluble salt is added to a water-soluble acrylamide polymer containing a predominant amount of acrylamide in the molecule to inhibit degradation, especially at high temperatures, in a petroleum recovery process.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: July 12, 1983
    Assignee: Nitto Chemical Industry, Co., Ltd.
    Inventors: Shoichi Kanda, Gengiro Kawamura
  • Transfer powder marking method using a core-shell powder comprising a pigment, solvent-insoluble polyester resin and a volatile halogenated hydrocarbon insoluble ingredient
    Patent number: 4393112
    Abstract: A method for marking employing a novel marking agent is disclosed wherein the marking agent is composed of a fine powder containing about 30 to 75% by volume of an ingredient which is insoluble in a solvent used to fix the marking agent.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: July 12, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Satoru Honjo, Yasuaki Yuyama, Masakazu Iwasa, Kazuo Imanishi
  • Process for the polymerization of vinyl halide polymers
    Patent number: 4391960
    Abstract: An improvement in the process for the polymerization of vinyl halide polymers comprising polymerizing at least one vinyl halide and, optionally, other olefinically-unsaturated monomers copolymerizable with vinyl halides, in an aqueous dispersion in the presence of free-radical-forming polymerization initiators, dispersants and, optionally, other additives in the presence of an inhibitor of polymer deposits and recovering said vinyl halide polymers, the improvement consisting essentially of adding to the reaction mixture from 10 to 1,000 ppm, based on the monomers, of at least one carbonyl compound having the formula: ##STR1## wherein R.sup.1 is selected from the group consisting of hydrogen and a hydrocarbon having from 1 to 9 carbon atoms selected from the group consisting of alkyl, aryl, alkaryl and aralkyl; R.sup.
    Type: Grant
    Filed: June 4, 1981
    Date of Patent: July 5, 1983
    Assignee: Wacker-Chemie GmbH
    Inventors: Willi Kleine, Werner Frey
  • Diene rubber compositions containing N,N'-dithioformanilide crosslinkers
    Patent number: 4391953
    Abstract: Substituted or unsubstituted N,N'-dithiobisformanilide compounds are disclosed, where the substituents can be lower alkyl, lower alkoxy, halogen or CF.sub.3. The compounds are vulcanizing agents for diene rubbers. Diene rubber compounds containing a cross-linking amount of the above compounds are also disclosed.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: July 5, 1983
    Assignee: Monsanto Company
    Inventor: Eiichi Morita
  • Continuous removal of residual hydrocarbons from polyolefins
    Patent number: 4391972
    Abstract: Polyolefins which are made by subjecting .alpha.-olefins to catalytic polymerization are freed from residual liquid hydrocarbons by means of steam and water. To this end, the invention provides:(a) for the hydrocarbon-containing polyolefin to be introduced into an aqueous emulsifier-containing emulsion and for the resulting mixture to be stirred so as to be converted to a homogeneous dispersion;(b) for the dispersion to be introduced into the upper portion of a column with at least 5 sieve plates therein and contacted countercurrently with steam of about 100.degree. to 120.degree. C.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: July 5, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karl Kaiser, Alexander Ohorodnik
  • Process for the suspension (CO)polymerization of vinyl chloride
    Patent number: 4391962
    Abstract: An improved process for the suspension polymerization of vinyl chloride in the presence of a radical initiator and at least two suspension stabilizers is disclosed. The improvement comprises performing the polymerization in the presence of at least one primary stabilizer selected from the group consisting of water-soluble partially hydrolyzed polyvinyl acetates and methyl hydroxypropyl cellulose and at least one secondary stabilizer selected from the group consisting of N-alkyl gluconamides wherein the alkyl group contains from about 16 to about 20 carbon atoms.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: July 5, 1983
    Assignee: Akzona Incorporated
    Inventors: Petrus H. M. Schreurs, Willem F. Verhelst
  • Process for the thermal after-treatment of paste-forming polymers of vinyl chloride
    Patent number: 4389522
    Abstract: In a process for the thermal after-treatment of paste-forming homo- or copolymers of vinyl chloride, obtained by aqueous emulsion polymerization, followed by spray-drying to produce a spray-dried powder, an improvement is provided wherein 20 to 60 percent by weight of the spray-dried powder is warmed for 1 second to 30 minutes to a treating temperature of 75.degree.-110.degree. C., and then is recombined with the non heat-treated, 80-40 percent by weight portion of the powder.
    Type: Grant
    Filed: September 16, 1981
    Date of Patent: June 21, 1983
    Assignee: Chemische Werke Huls, A.G.
    Inventors: Burkhard Boeke, Josef Kalka, Manfred Smolinski, Heinz Baukholt
  • Sulfur dioxide cured coatings
    Patent number: 4389433
    Abstract: An improved method of curing compositions of a monomer containing one or more acrylate moieties coated on a substrate is provided wherein the monomer composition is exposed to sulfur dioxide gas in the presence of a free radical initiator having a hydroperoxide moiety.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: June 21, 1983
    Assignee: RCA Corporation
    Inventor: Thomas R. Pampalone
  • Aromatic polyvinyl ethers and heat curable molding compositions obtained therefrom
    Patent number: 4388450
    Abstract: Aromatic polyvinylethers and active hydrogen compound reaction products thereof have been found to provide fast heat curable molding compositions when used with various heat activated curing catalysts, for example, diaryliodonium salts in combination with aromatic polyvinylether soluble copper compounds, or dialkylhydroxyarylsulfonium salts in combination with certain organic oxidants.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: June 14, 1983
    Assignee: General Electric Company
    Inventor: James V. Crivello
  • Safe, dry, free-flowing solid peroxide/unsubstituted or alkyl substituted benzoic acid compositions
    Patent number: 4387044
    Abstract: A safe, dry and free-flowing solid peroxide/unsubstituted or alkyl substituted benzoic acid composition is prepared by mixing the solid peroxide, such as diacyl peroxide, dialkyl peroxydicarbonate, dialkyl peroxide or alkylidene diperoxide, which melts above 30.degree. C., with solid benozic acid or an alkyl substituted benzoic acid, which melts above 40.degree. C. This solid peroxide composition is used as an initiator for the polymerization of ethylenically unsaturated monomers, such as styrene, and for curing of unsaturated polyester resins and diethylene glycol bis(allyl carbonate). This solid peroxide composition exhibits improved safety characteristics such as delayed ignition times when in contact with a flame and increased thermal stabilities compared to similar prior art peroxide formulations.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: June 7, 1983
    Assignee: Pennwalt Corporation
    Inventors: Jose Sanchez, Solomon C. Westbrook, Jr.
  • Block copolymer dispersion stabilizer and aqueous dispersion polymerization therewith
    Patent number: 4385164
    Abstract: A block copolymer dispersion stabilizer for use in the aqueous dispersion polymerization of an ethylenically unsaturated monomer comprises at least two blocks linked by chemical valences. At least one of the blocks is hydrophilic (water soluble) and at least another of said blocks is hydrophobic (water insoluble). The hydrophobic block can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality. Examples of such groups are epoxy groups and ethylenically unsaturated bonds.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: May 24, 1983
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Richard G. Sinclair, David L. Berry, George E. Cremeans, Richard A. Markle, Wesley M. Germon, Jr.
  • Product for manufacturing clutch or brake linings, and method of preparing same
    Patent number: 4384053
    Abstract: Product usable for manufacturing industrial articles such as friction linings for clutches and brakes. This product comprises a fine fibrous steel powder having a loose density of 0.2 to 1.5 g/c.c. with a carbon content of 0.95 to 1.10% by weight, the chromium content by weight ranging from 1.30% to 1.60%. The powder has a micrographic structure which, when observed in a plane intersecting a metal particle, shows a fine distribution of iron and chromium spherular carbides having the formula (Fe, Cr).sub.3 C in a mixed high-strength martensite and deformable austenite matrix.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: May 17, 1983
    Assignees: Societe Nouvelle de Roulements, Regie Nationale des Usines Renault
    Inventors: Fernand Peilloud, Gerard Gladel
  • Peroxygen compound-6-O-alkanoylisoascorbic acid redox catalyst system for suspension polymerization of vinyl chloride
    Patent number: 4382133
    Abstract: A process for the suspension polymerization of vinyl chloride, in the presence of a redox catalyst system consisting of a peroxyester or diacyl peroxide and an isoascorbic acid ester of a carboxylic acid.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: May 3, 1983
    Assignee: Dart Industries Inc.
    Inventor: Norman G. Gaylord
  • Method for removing chlorinated solvents from chlorinated polymers
    Patent number: 4381392
    Abstract: Method for removing chlorinated solvents from chlorinated polymers which retain them as a result of a chlorination process, wherein after being dried and pulverized, said chlorinated polymer is treated with a non-halogenated aliphatic organic solvent or a halogenated aromatic organic solvent. Said organic solvent pertains to the following groups: alcohols such as methanol, ethanol, isopropanol; esters such as methyl formate, ethyl formate, methyl acetate; nitriles such as acetonitrile; aromatic halides such as chlorobenzene; hydrocarbons such as n-hexane; and acetone.
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: April 26, 1983
    Assignee: Caffaro S.p.A.
    Inventor: Enrico Pontoglio
  • Resorcinol polymer bonded taphole mix and specialty materials
    Patent number: 4381355
    Abstract: A non-aqueous taphole mix comprising a binder, a non-aqueous solvent for the binder and a refractory filler, the binder comprising a mixture of polymers formed by the homopolymerization of resorcinol and a hardening agent. Also disclosed are carbon-containing specialties comprising a binder, a solvent for the binder, and a refractory filler, the binder comprising a mixture of polymers formed by the homopolymerization of resorcinol and a hardening agent.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: April 26, 1983
    Assignee: General Refractories Company
    Inventors: Francis W. Henry, Jr., Henry E. Anthonis, III, Subrata Banerjee
  • Prevulcanization inhibitors of thio-triazine-amines for rubber
    Patent number: 4380609
    Abstract: Vulcanizable rubber compositions are described which are inhibited from premature vulcanization by thio-substituted-1,3,5-triazine-diamine or -triamine.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: April 19, 1983
    Assignee: Monsanto Company
    Inventor: Eiichi Morita
  • Method for coprecipitating wire coating enamel composition
    Patent number: 4379916
    Abstract: Insulating wire coating enamels containing a mixture of polyvinyl acetal, phenolic and epoxy resins are prepared by precipitating the resins from a tetrahydrofuran solution with water. The precipitated resins are dried and electrostatically applied to transformer wire.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: April 12, 1983
    Assignee: General Electric Company
    Inventor: Ralph G. Flowers