Specified Material Contains An Organic Sulfur Compound Patents (Class 525/261)
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Patent number: 4945133Abstract: An oxidized halogenated polymer is prepared by a process comprising (a) forming an admixture of an acidic oxidizing agent and a suspension of a particulate halogenated polymer in a polar liquid; (b) heating the admixture to a temperature sufficient to initiate the reaction between the polymer and the oxidizing agent; and (c) continuing the reaction until an oxidized polymer having a preselected extent of oxidation is obtained. At least one addition polymerizable compound is, optionally, grafted to the oxidized halogenated polymer. The oxidized halogenated polymer and graft copolymers thereof have physical properties different from the halogenated polymer and graft copolymers thereof. Certain graft copolymers are non-caking or free flowing.Type: GrantFiled: November 22, 1988Date of Patent: July 31, 1990Assignee: The Dow Chemical CompanyInventors: Donald W. Pennington, Joseph L. Allison
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Patent number: 4935469Abstract: A process for producing monodispersed fine particles of a vinyl polymer is disclosed, which comprises polymerizing monomers containing at least one vinyl monomer selected from the group consisting of aromatic vinyl compounds, acrylic esters, and a methacrylic ester in the presence of (1) a surface active agent represented by formula (I) ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a substituted or unsubstituted alkyl group having from 4 to 8 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted cyclohexyl group and M represents an alkali metal, (2) from 10.sup.-3 to 10.sup.-1 mol/l of a persulfate as a polymerization initiator, and (3) from 10.sup.-4 to 10.sup.-2 mol/l of a divalent metal sulfate as an electrolyte. Monodispersed vinyl polymer fine particles having a particle size of 1 .mu.m or greater with a very narrow size distribution are obtained.Type: GrantFiled: February 3, 1988Date of Patent: June 19, 1990Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Akasaki, Naoya Yabuuchi, Tatsuro Ohki
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Patent number: 4927886Abstract: Polyvinyl chloride resins are treated with a low inherent viscosity-high glass transition temperature enhancing agent to impart improved processing properties thereto, especially melt flow, which are desirable in various melt type fabrication processes such as custom injection molding. The high glass transition temperature-inherent viscosity enhancing agent is made by polymerizing one or more high glass transition temperature agent forming monomers in the presence of a chain transfer agent. The agent has a high glass transition temperature as well as a low inherent viscosity. The high glass transition temperature-inherent viscosity enhancing agent is produced as an overpolymer in a mass polymerization reaction.Type: GrantFiled: August 14, 1987Date of Patent: May 22, 1990Assignee: The B. F. Goodrich CompanyInventors: Richard H. Backderf, Frank J. Donat
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Patent number: 4925898Abstract: An ethylene propylene rubber mixture highly adhesive to zinc-plated metals and a heat resistant ethylene propylene rubber conveyor belt having load-carrying zinc-plated steel cords embedded therein are disclosed.The heat resistant conveyor belt composed of (a) an outer covering rubber layer and an inner covering rubber layer both of an ethylene propylene rubber and (b) an adhesive rubber layer having load-carrying zinc-plated steel cords embedded therein parallel to each other at a distance therebetween in the longitudinal direction of the belt, the adhesive rubber layer being disposed between the covering rubber layers and bonded integrally to the covering rubber layers, the adhesive rubber comprising: an ethylene propylene rubber, an organic peroxide, a cross-linking aid, a cobalt salt of organic carboxylic acids, and sulfur.Type: GrantFiled: September 12, 1988Date of Patent: May 15, 1990Assignee: Bando Chemical Industries, Ltd.Inventors: Yuji Itokazu, Koichi Nishihira
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Patent number: 4908414Abstract: Impact-resistant translucent rubber-modified polystyrene is produced by polymerizing compounds from the class of the styrenes in the presence of an elastomeric polymer which contains thiol groups.Type: GrantFiled: April 14, 1989Date of Patent: March 13, 1990Assignee: BASF AktiengesellschaftInventors: Klaus Bronstert, Hans Hoenl, Adolf Echte, Peter Klaerner
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Patent number: 4908155Abstract: A surface-active block copolymer which comprises chemically linked polymeric blocks (A) and (B), block (A) of said copolymer consisting of at least one homo- or copolymerized non-polar alpha,beta-ethylenically unsaturated monomer and block (B) of said copolymer is derived by polymerizing an alpha-beta ethylenically unsaturated monomer containing an epoxy group and transforming the epoxy group into an hydroxy-substituted ionic group, preferably an anionic group. These block copolymers are used as dispersing agents in aqueous dispersions, including polymeric latex dispersions, and as plasticizing agent in hydrophilic colloid layers, including colloid layers containing a dispersed light-sensitive silver halide emulsion or other auxiliary substances for photographic materials.Type: GrantFiled: November 13, 1987Date of Patent: March 13, 1990Assignee: Agfa-Gevaert, N.V.Inventors: Luc E. Leemans, Herman J. Uytterhoeven, Philippe J. Teyssie, Roger M. Fayt, Nikolaas C. de Jaeger
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Patent number: 4885337Abstract: Process for the preparation of a thermoplastic moulding composition of 10 to 65% by weight of at least one graft polymer which is obtainable by emulsion polymerization of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, in the presence of at least one rubber base, and the weight ratio of monomers employed to rubber polymer employed being 20:80 to 70:30, and 90 to 35% by weight of a copolymer of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, wherein, to prepare the graft polymer, the grafting monomers and 0.05 to 1.00 part by weight (per 100 parts by weight of grafting monomer) of a mercaptan are added stepwise to the latex of the rubber base over a period of time, the part amount of the monomer added in each time interval .DELTA.t.sub.n+1 being 0.30 to 0.Type: GrantFiled: July 6, 1987Date of Patent: December 5, 1989Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
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Patent number: 4852884Abstract: Golf balls exhibiting a satisfactory coefficient of restitution while having higher Riehle compression and hence a softer feel are provided by the inclusion of a metallic dithiocarbamate in the core formulation.Type: GrantFiled: December 24, 1987Date of Patent: August 1, 1989Assignee: Spalding & Evenflo Companies, Inc.Inventor: Michael J. Sullivan
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Patent number: 4845156Abstract: Macromonomer prepared by contacting and reacting a polymer (oligomer) having at least three monomer repeat units and at least one silyl ether group, in the presence of an anion catalyst, with a terminally unsaturated acyl fluoride or sulfonyl fluoride.Type: GrantFiled: December 21, 1987Date of Patent: July 4, 1989Assignee: E. I. Du Pont De Nemours and CompanyInventor: Gordon M. Cohen
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Patent number: 4822858Abstract: During the reaction of grafting of styrene and acrylonitrile to polybutadiene, the conversion of the graft monomers is increased from the values of 92.div.94% usually obtained, to values very close to 98%, by carrying out a redox-type reaction additional to that provided by the process, in the presence of an additional aliquot of acrylonitrile and of catalytic system.Type: GrantFiled: May 22, 1986Date of Patent: April 18, 1989Assignee: Enichem Tecnoresine S.p.AInventors: Bruno Pivotto, Gualtiero Ferri, Franco Campana
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Patent number: 4814387Abstract: Various fabrication properties of polyvinyl chloride are improved such as melt flow by treating the polyvinyl chloride resin with a low inherent viscosity-high glass transition temperature enhancing agent. The treatment occurs as a suspension overpolymerization on the polyvinyl chloride resin by reacting at least one high glass transition temperature enhancing agent with at least one substantially water insoluble chain transfer agent. The formed high glass transition temperature-low inherent viscosity agent imparts a high glass transition temperature to the polyvinyl chloride resin and also reduces the inherent viscosity to a level below the inherent viscosity formed by the combined effect of the polyvinyl chloride resin and the glass transition temperature agent.Type: GrantFiled: August 14, 1987Date of Patent: March 21, 1989Assignee: The B. F. Goodrich CompanyInventor: Frank J. Donat
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Patent number: 4794144Abstract: Large acrylic star polymers containing multifunctional monomers in the core are made by group transfer polymerization techniques, preferably by arm-first, core-first, or arm-core-arm approaches.Type: GrantFiled: September 30, 1986Date of Patent: December 27, 1988Assignee: E. I. Du Pont de Nemours and CompanyInventor: Harry J. Spinelli
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Patent number: 4780228Abstract: Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in the presence of a free radical catalyst such as a peroxide or azo free radical initiator and a chain stopping agent, e.g. a mercaptan to inhibit excessive cross-linking and branching. The copolymer grafted directly with the nitrogen-containing monomers may be utilized as an additive for oil and fuel compositions, particularly lubricating oil compositions as a V.I.-dispersant additive. The polymer reacted with carboxylic acid may be further reacted with amines, polyols, amino-alcohols, etc. to also form a V.I.-dispersant additive.Type: GrantFiled: June 18, 1987Date of Patent: October 25, 1988Assignee: Exxon Chemical Patents Inc.Inventors: John B. Gardiner, Martyn N. Dick
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Patent number: 4772668Abstract: Sulphur-containing elastic-thermoplastic graft products of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, acrylonitrile or methyl methacrylate or mixtures thereof on a particle-like rubber with an average particle diameter (d.sub.50) of from 0.05 to 20.0 .mu.m and a glass temperature .ltoreq.10.degree. C. with a total rubber content of from 1 to 80% by weight, whereby the graft products have a sulphur content of from 1.15 to 3.95% by weight and the thermoplast proportion of the polymerized monomers on the particle-like rubber has a limiting viscosity of from 2 to 15 ml/g (measured in dimethyl formamide at 25.degree. C.) and in which at least 90% by weight of the incorporated sulphur is present as a constituent of terminal C1-18-thioalkyl groups.Type: GrantFiled: February 10, 1986Date of Patent: September 20, 1988Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
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Patent number: 4739015Abstract: A process for producing a propylene block copolymer in the presence of a highly stereospecific olefin polymerization catalyst which comprises producing a crystalline polymer or copolymer of propylene in a first stage and random-copolymerizing propylene and another alpha-olefin in a mole ratio of from 10:90 to 90:10 in the presence of the propylene polymer or copolymer in a second stage; wherein in the random copolymerization, 0.0001 to 0.5 mole, per gram atom of aluminum in the catalyst, of an oxygen-containing compound being gaseous in a standard condition or 0.001 to 1 mole, per gram atom of aluminum in the catalyst, of an active hydrogen-containing compound being liquid or solid in a standard condition is fed into the random-copolymerization reaction system.Type: GrantFiled: September 12, 1985Date of Patent: April 19, 1988Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akinori Toyota, Norio Kashiwa, Haruyuki Koda, Matsunao Maeda
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Patent number: 4708994Abstract: This invention describes the preparation of reactive engineering thermoplastics containing arylcyclobutene groups pendant to an aromatic ring. The polymers are prepared by alkylation or acylation of an engineering thermoplastic which contains one or more aromatic groups capable of being alkylated or acylated with a suitable arylcyclobutene alkylating or acylating agent. The prepared reactive engineering thermoplastics containing pendant arylcyclobutene groups may be cross-linked and cured by heating above about 200.degree. C.Type: GrantFiled: June 30, 1986Date of Patent: November 24, 1987Assignee: Shell Oil CompanyInventor: Pui K. Wong
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Patent number: 4703090Abstract: Graft copolymers are prepared by means of a two-step polymerization process, in emulsion: in the first step, a vinylaromatic monomer and an acryl or metacryl monomer are grafted on a monomodal polybutadiene latex constituted of particles of diameter comprised within the range of from 800 to 2500 .ANG.. The polymerization/grafting reaction is continued up to a 70-90% conversion, at which time a further portion of monomodal polybutadiene is added, together with further amounts of said monomers, always in emulsion.Type: GrantFiled: December 9, 1985Date of Patent: October 27, 1987Assignee: Enichem Polimeri S.p.A.Inventors: Andrea Ferraresi, Pierluigi Griselli
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Patent number: 4703089Abstract: A one-component adhesive for metal surfaces such as iron, zinc, copper, cadmium and their alloys will cure upon contact with the metal surface. The adhesive composition includes olefinically unsaturated monomer; reactive or non-reactive polymer; an acidic material; a compound containing sulfonyl halide group; and a compound containing a transition metal. The adhesive composition cures rapdily upon contact with a metal surface to form an adhesive bond between the surfaces. The adhesive composition is especially useful as a thread-lock adhesive, and as an adhesive for bonding structural components.Type: GrantFiled: April 10, 1984Date of Patent: October 27, 1987Inventor: Dennis J. Damico
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Patent number: 4683269Abstract: The present invention relates to an opaque binder system containing a core-shell polymer and polymeric binder. The system is prepared and blended in-situ and demonstrates improvement in contrast ratio and scrub properties over corresponding compositions wherein the core-shell polymer is separately produced and subsequently blended with a binder polymer.Type: GrantFiled: December 18, 1985Date of Patent: July 28, 1987Assignee: Reichhold Chemicals, Inc.Inventor: Igor B. Aksman
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Patent number: 4654378Abstract: The instant invention is directed to a process for the manufacture of poly(dimethyldiallyl ammonium chloride) comprising:(a) casting upon a continuous belt apparatus to form a film having a thickness of 1/4 inch to 1 inch an aqueous dimethyldiallyl ammonium chloride solution having a monomer concentration of at least 65 percent, by weight, monomer, said monomer solution also containing a photoreducible dye in a concentration of 1.times.10.sup.-7 to 1.times.10.sup.-4 moles per liter, a mild reducing agent in a concentration of 1.times.10.sup.-5 to 1.times.10.sup.-2 moles per liter and thermal initiator in a concentration of 1.times.10.sup.-5 to 1.times.10.sup.-2 moles per liter;(b) passing of the solution under a series of lights which emit visible light at an intensity of 0.1 to 10,000 foot candles and controlling the temperature of the monomer solution in the range of 5.degree. C. to 65.degree. C.Type: GrantFiled: May 2, 1984Date of Patent: March 31, 1987Assignee: Calgon CorporationInventors: Wood E. Hunter, Gary P. Craun
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Patent number: 4588782Abstract: A diene polymer produced by polymerizing a conjugated diene monomer in a solvent solution of an active lithium-terminated polymer in the presence of a catalyst consisting of (A) a cobalt compound and (B) carbon disulfide and/or phenylisothiocyanic acid. The diene polymer comprises a 1,2-polybutadiene portion having a high percentage of vinyl conformation. The diene polymer has substantially no mercaptan compound.Type: GrantFiled: January 11, 1985Date of Patent: May 13, 1986Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Hisao Ono, Fumio Tsutsumi, Mitsuhiko Sakakibara, Eitaro Okuya
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Patent number: 4556220Abstract: The present invention provides solid golf balls having excellent rebound performance, durability and flight carry characteristics produced from a rubber composition containing one or more agents for regulating the molecular weight of grafted chain selected from the group consisting of 2-(4-morpholinyldithio) benzothiazole, 4,4'-dithio-bis-dimorpholine, dipentamethylenethiuram tetrasulfide and derivatives thereof.Type: GrantFiled: June 7, 1984Date of Patent: December 3, 1985Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Ichiro Tominaga, Akihiro Nakahara
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Patent number: 4554301Abstract: There is provided a modified two-part type adhesive composition comprising liquid I composed of an acrylic monomer, an organic peroxide, and, if necessary, a gelation stabilizer and liquid II composed of an acrylic monomer, a curing accelerator, and, if necessary, a gelation stabilizer, at least one of the liquids containing a modified nitrile rubber in an amount of 2 to 50% by weight, and said modified nitrile rubber having carboxyl groups and the carboxyl groups being bonded to a (meth)acrylic group-containing acid phosphate through partially a covalent bond and partially an ionic bond.Type: GrantFiled: March 19, 1984Date of Patent: November 19, 1985Assignee: Okura Kogyo Kabushiki KaishaInventors: Hidemi Dohi, Hideaki Matsuda
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Patent number: 4521567Abstract: A method for making impact resistant molding compositions wherein a hard phase having a glass transition temperature above 25.degree. C. and consisting principally of methyl methacrylate is polymerized at least partially in a first stage, following which the monomers of a rubbery phase whose polymers have a glass transition temperature below 25.degree. C. are added in a second stage and the polymerization is carried to completion, polymerization of the hard phase in the first stage being performed in a presence of an oil soluble free radical initiator and of an organosulfur chain transfer agent having at least two thiol groups in the molecule, and polymerization of the monomers of the rubbery phase in the second stage being carried out with graft crosslinkers in the presence of the previously formed hard phase.Type: GrantFiled: August 6, 1984Date of Patent: June 4, 1985Assignee: Rohm GmbHInventors: Peter J. Arndt, Walter Ludwig, Manfred Munzer, Werner Siol, Franz Wenzel
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Patent number: 4520166Abstract: A vinyl chloride polymer having an excellent workability, lubricating property, and gelling property comprises (1) from 80 to 99.95 weight % of a polymeric ingredient (I) consisting of polyvinyl chloride and/or a copolymer of 80 weight % or more of vinyl chloride with 20 weight % or less of another comonomer and (2) from 0.05 to 20 weight % of a polymeric ingredient (II) consisting of at least one three-stage emulsion polymerization product prepared by first polymerizing, in the presence of a polymeric component (a) consisting of polymethyl methacrylate and/or a copolymer of 50 weight % or more of methyl methacrylate and 50 weight % or less of another comonomer, from 40 to 70 parts by weight of a first monomeric component (b) consisting of an alkyl acrylate (C.sub.1-18) and/or benzyl acrylate or a mixture of 30 weight % or more of an alkyl acrylate (C.sub.1-18) and/or benzyl acrylate with 70 weight % or less of an alkyl methacrylate (C.sub.Type: GrantFiled: March 21, 1983Date of Patent: May 28, 1985Assignee: Mitsubishi Rayon Company, Ltd.Inventors: Kazumasa Kamada, Norihisa Osaka, Masahiro Kaneda
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Patent number: 4506056Abstract: A process for the preparation of carboxyl-containing polymers comprising mixing together maleic anhydride, a free radical initiator, an additive which inhibits the homopolymerization of maleic anhydride but not that of methyl methacrylate below about 100.degree. C. and a polymer, above its melting point, in the absence of a solvent. The process yields anhydride-containing polymers without the substantial crosslinking or degradation which characterize the process in the absence of the additive.Type: GrantFiled: June 18, 1982Date of Patent: March 19, 1985Assignee: Gaylord Research Institute Inc.Inventor: Norman G. Gaylord
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Patent number: 4500608Abstract: Anaerobically-curing compositions are described comprising (A) a polymerizable monomer; (B) a halogen-containing compound as a first initiator component; (C) an amine, organic sulfimide or perfluoroalkyl sulfonanilide as a second initiator component; and (D) an inhibitor of free-radical polymerization. These compositions are particularly suitable as adhesives and may be formulated as thread-locking adhesives or may be modified by the addition of various modifying polymers to obtain desired properties such as increased viscosities or pressure-sensitive properties.Type: GrantFiled: December 9, 1983Date of Patent: February 19, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Anthony J. Rametta
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Patent number: 4481335Abstract: A rubber molding composition comprising cured rubber scrap (as from automobile tires), a liquid, sulfur-curable polymeric binder, and a curing agent for the polymeric binder. The composition employs from about one to about five parts by weight of the polymeric binder per 100 parts by weight of the scrap rubber. The thus treated rubber scrap may be used in large proportions as a filler or extender for uncured rubbers.Type: GrantFiled: August 10, 1981Date of Patent: November 6, 1984Inventor: Fred J. Stark, Jr.
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Patent number: 4480076Abstract: Flexible thermoplastic vinyl chloride polymers are prepared by graft or over copolymerizing said polymers with a mixture of certain acrylates and nitriles or by blending said vinyl chloride polymer with a terpolymer of certain acrylates and nitriles.Type: GrantFiled: June 21, 1982Date of Patent: October 30, 1984Assignee: The General Tire & Rubber CompanyInventors: Earl G. Melby, Hubert J. Fabris, Russell A. Livigni, Harry W. Cocain
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Patent number: 4450256Abstract: A thermoplastic resin which is outstanding in impact resistance and heat distortion resistance and is discolored only little by heat is produced by polymerizing, in the presence of diene type synthetic rubber, a monomer mixture of acrylonitrile and styrene, adding thereto a monomer mixture containing more than 80 wt % of .alpha.-methylstyrene, and then adding thereto little by little a monomer mixture containing more than 70 wt % of acrylonitrile, whereby 95-70 parts by weight of monomer is polymerized in the presence of 5-30 parts by weight of the diene type synthetic rubber.Type: GrantFiled: January 12, 1983Date of Patent: May 22, 1984Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Sigemi Matsumoto, Fumiya Nagoshi
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Patent number: 4448923Abstract: Latex of an interpolymer composed of (1) a copolymer A of butadiene, styrene and at least one ethylenically unsaturated carboxylic acid, and (2) a polymer B of at least one halogenoalkyl or halogenoacetoxyalkyl ester of an ethylenically unsaturated monocarboxylic or dicarboxylic acid, polymer B being at least partially grafted onto the copolymer A.The latex is prepared by the emulsion polymerization of butadiene, styrene and at least one copolymerizable, ethylenically unsaturated carboxylic acid to form a copolymer latex, followed by the polymerization in the presence of the copolymer latex of a halogenoalkyl or halogenoacetoxyalkyl ester of an ethylenically unsaturated monocarboxylic or dicarboxylic acid.The latex may be used as a binder in aqueous compositions for coating paper.Type: GrantFiled: March 17, 1983Date of Patent: May 15, 1984Assignee: Rhone Poulenc Specialites ChimiquesInventors: Roland Reeb, Bernard Chauvel
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Patent number: 4448932Abstract: This invention relates to a polyvinyl chloride resin composition containing said resin and a significant amount of a polymer of butadiene in the form of a shell-core polymer wherein a polymer of methylmethacrylate forms said shell and completely encapsulates the core containing the butadiene polymer.Type: GrantFiled: September 2, 1982Date of Patent: May 15, 1984Assignee: GAF CorporationInventors: Yehuda Ozari, Suzanne B. Nelsen, Andrew Klein
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Patent number: 4448580Abstract: A thermoplastic resin having an excellent thermal stability and a high heat resistance is prepared by initiating polymerization of 65-85 parts by weight of a monomer mixture (A) consisting of 50-85% by weight of .alpha.-methylstyrene, 3-20% by weight of methyl methacrylate, 2-20% by weight of acrylonitrile, and 0-25% by weight of an aromatic alkenyl compound other than .alpha.-methylstyrene, continuously or intermittently adding, on the way of the polymerization, 2-15 parts by weight of a monomer (B) consisting of acrylonitrile or a mixture thereof with an aromatic alkenyl compound other than .alpha.-methylstyrene to the polymerization system while continuing the polymerization, further adding to the polymerization system 5-25 parts by weight of a monomer (C) consisting of an aromatic alkenyl compound other than .alpha.Type: GrantFiled: September 23, 1982Date of Patent: May 15, 1984Assignee: Japan Synthetic Rubber Co., Ltd.Inventors: Mitsuo Abe, Syuji Tsuchikawa, Teizo Fukuta, Tsugio Asakawa
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Patent number: 4448924Abstract: Latex of an interpolymer composed of (1) a copolymer A of butadiene, styrene and at least one ethylenically unsaturated carboxylic acid, and (2) a polymer B of a halogenohydroxyalkyl ester of an ethylenically unsaturated monocarboxylic or dicarboxylic acid, polymer B being at least partially grafted onto the copolymer A. The latex is prepared by the emulsion polymerization of butadiene, styrene and at least one copolymerizable, ethylenically unsaturated carboxylic acid, followed by the polymerization, in the presence of the copolymer latex, of a halogenohydroxyalkyl ester of an ethylenically unsaturated monocarboxylic or dicarboxylic acid. The latex may be used as a binder in aqueous compositions for coating paper.Type: GrantFiled: March 17, 1983Date of Patent: May 15, 1984Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Roland Reeb, Bernard Chauvel
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Patent number: 4446277Abstract: A thermoplastic molding material based on a styrene polymer which has been made impact-resistant, and on a polyphenylene ether, wherein the impact-resistant styrene polymer comprises a soft component which has a mean particle diameter of greater than 0.3 .mu.m and contains an acrylic ester polymer as the elastomeric component. The novel molding materials possess improved flow and give moldings having improved aging resistance.Type: GrantFiled: May 23, 1983Date of Patent: May 1, 1984Assignee: BASF AktiengesellschaftInventors: Franz Brandstetter, Adolf Echte, Franz Haaf, Juergen Hambrecht, Herbert Naarmann
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Patent number: 4446270Abstract: A composition comprising elastomeric copolymer gum of vinylidene fluoride and at least one terminally unsaturated monolefin comonomer and as a vulcanizing agent therefor a composition comprising one or a mixture of aromatic compounds having hydroxyl and oxyallyl groups directly bonded to aromatic ring-carbon atoms.Type: GrantFiled: August 8, 1983Date of Patent: May 1, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard A. Guenthner, David A. Stivers
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Patent number: 4444933Abstract: A cyanoacrylate-based adhesive composition comprises 55-92% by weight of a 2-cyanoacrylate ester, preferably the ethyl ester, from 40-30% by weight of a vinyl chloride/vinyl acetate copolymer and not more than 25% by weight of a plasticizer (the plasticizer may be omitted entirely). The copolymer is preferably a vinyl chloride/vinyl acetate/maleic acid terpolymer. The adhesive compositions have greatly reduced adhesion to skin, not forming strong skin bonds for at least 30 seconds, in contrast to conventional cyanoacrylate adhesive compositions which form, within in about one second bonds strong enough to tear skin.Type: GrantFiled: December 2, 1982Date of Patent: April 24, 1984Assignee: Borden, Inc.Inventors: Peter S. Columbus, John Anderson
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Patent number: 4440910Abstract: Disclosed are cyanoacrylate adhesive compositions containing elastomeric polymers as fillers. Preferred fillers are the acrylic rubbers. Filler concentration range from about 0.5-40% by weight of the composition. Beneficial results include improved toughness of the cured compositions, as measured by impact, peel and tensile strength properties, particularly after exposure elevated temperatures which would ordinarily severely degrade the adhesive strength.Type: GrantFiled: January 18, 1982Date of Patent: April 3, 1984Assignee: Loctite CorporationInventor: John T. O'Connor
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Patent number: 4440906Abstract: The use of tricyclodecenyl alcohol in place of other crosslinking agents for crosslinking the soft component of impact-resistant polystyrene based on a polystyrene-grafted poly(alkyl acrylate) improves the flow of mixtures of the said polystyrene with polyphenylene ethers.Type: GrantFiled: January 6, 1982Date of Patent: April 3, 1984Assignee: BASF AktiengesellschaftInventors: Franz Brandstetter, Juergen Hambrecht, Adolf Echte
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Patent number: 4434267Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.Type: GrantFiled: March 31, 1982Date of Patent: February 28, 1984Assignee: Hercules IncorporatedInventors: William W. Maslanka, Gavin G. Spence
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Patent number: 4427826Abstract: A process, carried out without a diluent or in solution, in more than 2 reaction zones, for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a monomeric aromatic vinyl compound and an elastomeric polymer, in an amount of from 3 to 16% by weight based on the monomer, are polymerized, in the absence of a free radical initiator, but in the presence of a mercaptan as a chain transfer agent, at from 80.degree. to 180.degree. C. in a first reaction zone, with stirring, up to a maximum monomer conversion, U.sub.max, given by the equationU.sub.max =K-1where K is the amount of rubber in % by weight based on monomer, and, in a second reaction zone, polymerization is continued, with stirring, to a conversion of up to about 50% by weight, after which a chain transfer agent is introduced in an amount of from 0.01 to 0.Type: GrantFiled: June 15, 1981Date of Patent: January 24, 1984Assignee: BASF AktiengesellschaftInventors: Adolf Echte, Hermann Gausepohl, Hermann P. Hofmann, Hans Mittnacht
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Patent number: 4421875Abstract: The invention relates to a process for the manufacture of impact resistant thermoplastic molding materials wherein potassium salts of saturated or unsaturated fatty acids with 10 to 30 carbon atoms are used as emulsifier.Type: GrantFiled: April 8, 1982Date of Patent: December 20, 1983Assignee: BASF AktiengesellschaftInventors: Graham E. McKee, Franz Brandstetter, Adolf Echte, Juergen Hambrecht, Heinz-Juergen Overhoff, Edmund Priebe, Josef Schwaab, Peter Siebel
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Patent number: 4421895Abstract: A process for making ABS polymer particles comprising continuous polymerization of a mixture of at least one of each of (a) an aromatic vinyl monomer, and (b) an ethylenically unsaturated monomer in a weight ratio of (a):(b) of 90:10 to 10:90 in the presence of at least one of each of (c) a rubber-like polymer in an amount of 3 to 35 percent by weight relative to the total weight of the monomers (a) and (b), (d) a solvent, (e) a radical initiator and (f) an optional chain transfer agent. The process is carried out at temperatures between 80.degree. C. to 180.degree. C. in two or more reaction zones while the reaction mixture is stirred and while the monomers and solvents are removed in a degassing zone. The rubber-like polymer (c) has a solution viscosity of less than 80 mPa.s and a ratio of the solution viscosity of (c) to a percent of solvent expressed by 100[(d)/(a+b+c+d)] equal to or less than 2.5 mPa.s/percent of solvent.Type: GrantFiled: December 10, 1981Date of Patent: December 20, 1983Assignee: BASF AktiengesellschaftInventors: Adolf Echte, Hermann Gausepohl, Karl Gerberding
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Patent number: 4410656Abstract: The method of masticating diene rubber in the presence of maleic acid or maleic anhydride together with sulfur or an organic sulfur compound capable of generating a thiyl radical is shown.Improved tack, green strength or both are realized in the treated diene rubber.Type: GrantFiled: May 3, 1982Date of Patent: October 18, 1983Assignee: Monsanto CompanyInventors: Aubert Y. Coran, Charles P. Rader, Chester D. Trivette, Jr.
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Patent number: 4385156Abstract: Styrenic polymer expandable beads that are useful in forming heat-resistant foamed articles are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto a portion of a comonomer solution of styrenic monomer and methacrylic acid, which solution also contains a polymerization regulator, forming an emulsion of catalyst, monomer solution and polyvinyl alcohol suspending agent, adding portions of the emulsion to the suspension and then adding the remainder of the comonomer solution to the suspension, and the suspension with added monomers is heated to copolymerize the styrenic monomer and methacrylic acid about the initial beads and form a coating about the beads.Type: GrantFiled: April 1, 1982Date of Patent: May 24, 1983Assignee: Atlantic Richfield CompanyInventors: Alvin R. Ingram, Harold A. Wright, Walter O. Pillar, Adolph V. DiGiulio, Kenneth D. Thom
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Patent number: 4367311Abstract: The use of alkyl acrylate in the preparation of the soft component of impact-resistant polystyrene based on polystyrene-grafted butadiene mixed with polyphenylene ether reduces the dust attraction of moldings prepared from this type of mixture.Type: GrantFiled: January 11, 1982Date of Patent: January 4, 1983Assignee: BASF AktiengesellschaftInventors: Franz Brandstetter, Graham E. McKee, Edmund Priebe
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Patent number: 4360609Abstract: The char-forming characteristics of vinyl aromatic polymers are improved by the incorporation therein of (1) active allyl and/or benzyl carbon moieties and (2) an arylsulfonate ester. In an example, a styrenic polymer comprising polyvinylbenzylacetate is given increased char-forming ability by the presence of pentaerythritol parabromobenzenesulfonate.Type: GrantFiled: December 28, 1981Date of Patent: November 23, 1982Assignee: The Dow Chemical CompanyInventors: Charles E. Reineke, Kent S. Dennis
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Patent number: 4358564Abstract: This invention relates to a process for controlling viscosity during the preparation of modified or grafted low viscosity polyethylene and ethylene/alpha olefin waxes comprising reacting the low viscosity waxes with an unsaturated polycarboxylic component in the presence of a free radical source and at least one viscosity stabilizer.Type: GrantFiled: May 29, 1981Date of Patent: November 9, 1982Assignee: Eastman Kodak CompanyInventor: William A. Ames
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Patent number: 4351923Abstract: The invention relates to a process for preparing terpolymer polyblends having high gloss and ductility in formed articles, wherein, rubber particles in an aqueous latex are reacted with an alkenyl aromatic, alkenyl nitrile and alkyl acrylate monomer formulation such that said rubber particles become grafted with at least a portion of said monomers while said monomers form a matrix terpolymer phase of said monomers followed by separating said matrix phase terpolymer and said grafted rubber particles from said latex as a terpolymer polyblend. The invention also relates to a composition of said process.Type: GrantFiled: December 4, 1980Date of Patent: September 28, 1982Assignee: Monsanto CompanyInventor: Edward F. Tokas
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Patent number: 4340690Abstract: New compositions and a process for the preparation of conjugated diene polymers of broadened molecular weight distribution by reacting non-terminated lithium catalyzed conjugated diene polymers with cyclic organic compounds selected from the group of carbonates, thiocarbonates and sulfites. The resulting new compositions are suitable for use in making high impact plastics and for fabricating rubber goods.Type: GrantFiled: June 25, 1981Date of Patent: July 20, 1982Assignee: The Goodyear Tire & Rubber CompanyInventors: Joginder Lal, Michael L. Senyek