Specified Material Contains A Phosphorus Atom Patents (Class 525/255)
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Patent number: 5929169Abstract: This invention provides curable fluoroelastomer compositions comprising: (a) a fluorine-containing polymer or blend of fluorine-containing polymers each comprising interpolymerized units derived from one or more fluorine-containing ethylenically unsaturated monomers; (b) at least one organo-onium compound such as those selected from the group consisting of ammonium, arsonium, phosphonium, stibonium, amino-phosphonium, phosphorane (e.g. triarylphosphorane), iminium, and sulfonium compounds; and (c) one or more aryl, allyl or alkyl carbonate-blocked compounds as crosslinking agents. Methods of curing fluoroelastomer compositions, and articles made therefrom are also described.Type: GrantFiled: November 26, 1997Date of Patent: July 27, 1999Assignee: Dyneon LLCInventors: Naiyong Jing, Robert E. Kolb
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Patent number: 5902838Abstract: Cationically curable adhesives and sealants with increased viscosities and improved rheological control and good storage stability are prepared using a cationically curable monomer and a thickening polymer which is the alkylation reaction product of poly(4-hydroxystyrene) or poly(2-hydroxystyrene) with a compound RX where R is allyl, methallyl, crotyl or prenyl and X is Cl, Br or I. The cationically curable monomer suitably includes at least one alkenyloxystyrene monomer. Such thickened adhesives are useful as edge sealants for flat panel display devices. A-stage curing of the adhesive with UV irradiation allows for near ambient temperature fixturing of the device assemblies and B-stage thermal curing of the adhesive can be conducted at much lower temperatures than are needed for glass frit sealants. The B-stage cured products have thermal resistance, outgassing and substrate adhesion properties adequate for flat panel display devices.Type: GrantFiled: October 1, 1996Date of Patent: May 11, 1999Assignee: Loctite CorporationInventors: John G. Woods, Maria L. Masterson, Matthew P. Burdzy, Bernard M. Malofsky
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Patent number: 5837776Abstract: Aqueous dispersions of water soluble nonionic and anionically charged vinyl and allyl addition polymers can be obtained by polymerizing in the presence of an anionically charged water soluble polymer stabilizer in a saturated salt solution. Methods for the preparation of these polymers, and their compositions are disclosed.Type: GrantFiled: January 10, 1997Date of Patent: November 17, 1998Assignee: Nalco Chemical CompanyInventors: Radhakrishnan Selvarajan, John R. Hurlock
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Patent number: 5728773Abstract: This invention provides curable fluoroelastomer compositions comprising: (a) a fluorine-containing polymer or blend of fluorine-containing polymers each comprising interpolymerized units derived from one or more fluorine-containing ethylenically unsaturated monomers; (b) at least one organo-onium compound such as those selected from the group consisting of ammonium, arsonium, phosphonium, stibonium, amino-phosphonium, phosphorane (e.g. triarylphosphorane), iminium, and sulfonium compounds; and (c) one or more aryl, allyl or alkyl carbonate-blocked compound as a crosslinking agents. Methods of curing fluoroelastomer compositions, and articles made therefrom are also described.Type: GrantFiled: February 21, 1997Date of Patent: March 17, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Naiyong Jing, Robert E. Kolb
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Patent number: 5726245Abstract: Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.Type: GrantFiled: November 27, 1996Date of Patent: March 10, 1998Assignee: Roehm GmbH Chemische FabrikInventors: Uwe Numrich, Michael Wicker, Thomas Rhein, Thomas Suefke
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Patent number: 5658663Abstract: A vinylidene fluoride resin fiber have a diameter of not less than 0.5 mm, and satisfy the formulae (1) and (2):Ra.gtoreq.0.5 (1)Rb.gtoreq.(Ra+Rc)/3.0 (2)wherein Rc represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the center point of a fiber cross-section, Rb represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the point of r/3 from the center point thereof, and Ra represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the point of 2r/3 from the center point thereof, wherein r is a radius of the fiber cross-section.Type: GrantFiled: November 27, 1995Date of Patent: August 19, 1997Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Toshiya Mizuno, Seiichi Ohira, Mitsuru Itoh, Kazuyuki Munakata, Satoshi Hashimoto
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Patent number: 5610248Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation. The present invention also concerns block copolymers and methods of making the same using anionic polymerization in the presence of a phosphonium cation to prepare at least one block of the copolymer.Type: GrantFiled: March 6, 1995Date of Patent: March 11, 1997Assignee: The University of Southern CaliforniaInventors: Thieo Hogen-Esch, Angela Zagala
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Patent number: 5565525Abstract: A resin composition curable through a Michael reaction between (a) a component having a plurality of .alpha., .beta.-unsaturated carbonyl groups and (b) a component having a plurality of activated methylene, activated methyne or hydroxyl groups is disclosed. The curing reaction is catalyzed with a quaternary ammonium, quaternary phosphonium or tertiary sulfonium salt in the presence of an epoxy compound independently added to the composition or covalently attacted to either component (a) or component (b).Type: GrantFiled: October 26, 1994Date of Patent: October 15, 1996Assignee: Nippon Paint Co., Ltd.Inventors: Hideo Morimoto, Kei Aoki, Takashi Irie, Hiroto Yoneda
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Patent number: 5530070Abstract: A graft copolymer dispersant (binder) having a weight average molecular weight of about 5,000-100,000 wherein: (1) the graft copolymer has a polymeric backbone formed by polymerizing ethylenically unsaturated monomers; (2) the graft copolymer has macromonomer side chains attached to the backbone at a single terminal point that have weight average molecular weights of about 1,000-30,000 and are formed from by polymerizing ethylenically unsaturated monomers in the presence of a cobalt chain transfer agent. The graft copolymer further contains about 2 to 70% by weight, based on the weight of the graft copolymer, of polymerized constituents having a phosphate moiety or phosphoric acid moleties that are polymerized into the backbone, the side chains, or both. The graft copolymer is neutralized with an inorganic base or an amine.Type: GrantFiled: August 25, 1995Date of Patent: June 25, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: Joseph A. Antonelli, Lee A. E. Becton, Brian P. Devlin, Christopher Scopazzi
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Patent number: 5521252Abstract: Acrylic multilayer polymer powders containing coagulated powders of emulsified latexes of acrylic multilayer polymers, which are suitable for drying methods using pressure dehydration extruders, etc, comprises not more than 40 wt % of a fine powder of a particle size of 212 .mu.m or less after drying, and have a volume of gaps of a pore size of 5 .mu.m or less after drying of not more than 0.7 cc per unit weight as measured by a mercurial pressure method. A desired monomer is subjected to emulsion polymerization to produce an emulsified latex of an acrylic multilayer polymer, which is then poured into a coagulating solution for coagulation.Type: GrantFiled: February 17, 1995Date of Patent: May 28, 1996Assignee: Mitsubishi Rayon Company Ltd.Inventors: Kaoru Matsuda, Hirofumi Uno, Akihiro Toritani, Jun Nakauchi
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Patent number: 5446093Abstract: A process is disclosed for producing six-armed and eight-armed asymmetric radial block copolymers. The process comprises anionically polymerizing a diene and/or a vinyl aromatic hydrocarbon to create living polydiene and/or vinyl aromatic hydrocarbon arms, sequentially anionically polymerizing a vinyl aromatic hydrocarbon and a diene to create living block copolymer arms and coupling the two sets of arms together in one step with a coupling agent that will couple six or eight arms, wherein the molar ratio of the vinyl aromatic hydrocarbon-diene arms to the polydiene arms is sufficient to produce a statistical blend with less than 5 weight percent homopolydiene.Type: GrantFiled: November 10, 1993Date of Patent: August 29, 1995Assignee: Shell Oil CompanyInventors: Ronald J. Hoxmeier, Bridget A. Spence, Steven S. Chin, Michael A. Masse
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Patent number: 5314958Abstract: Process for preparing a graft copolymer having a high graft copolymer fraction which comprises subjecting a monomer to a polymerization initiation condition resulting from the reaction of a halogen-containing polymer with a combination of a reducing agent and a phase transfer catalyst such as an onium compound thereby to polymerize said monomer.Type: GrantFiled: May 27, 1992Date of Patent: May 24, 1994Assignee: Mitsubishi Petrochemical Company LimitedInventor: Shunichi Himori
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Patent number: 5300578Abstract: A method for preparing a polyolefine--vinyl polymer composite, wherein about 10-200 parts by weight of vinyl monomer and about 0.01-4.0 parts by weight of a free radical polymerization initiator, based on 100 parts by weight of vinyl monomer, are impregnated in 100 parts of weight of polyolefine particles by slowly mixing these at a temperature of about 20.degree.-130.degree. C. while maintaining the particle structure of the polyolefine. After 50-99% of the amount of the monomer has been absorbed into the polyolefine particles, a water suspension is prepared by adding to the above-mentioned mixture about 80-1000 parts by weight water, based on 100 parts of weight of polyolefine+vinyl monomer, as well as a stabilizing agent. The temperature of the water suspension is then increased for polymerizing the vinyl monomer.Type: GrantFiled: January 27, 1993Date of Patent: April 5, 1994Assignee: Neste OyInventors: Torvald Vestberg, Ismo Lehtiniemi
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Patent number: 5268429Abstract: An improved process for the production of linear block copolymers of vinylaromatic hydrocarbon and conjugated alkadiene comprises the coupling of living polymer chains containing at least one block of polymerized vinylaromatic hydrocarbon and at least one block of polymerized conjugated alkadiene wherein the coupling agent is an aromatic phosphonite.Type: GrantFiled: May 28, 1992Date of Patent: December 7, 1993Assignee: Shell Oil CompanyInventors: Margaretha J. C. M. Koppes, Johannes A. Van Doorn, Judith J. B. Walhof
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Patent number: 5250629Abstract: There is provided a process for producing a styrenic graft copolymer which comprises coplymerizing a styrenic monomer and a styrenic monomer having a hydrocarbon radical with an unsaturated bond in the presence of a catalyst comprising as primary ingredient (A) a transition metal compound and (B) a contact product of an organoaluminum compound and a condensation agent or (C) a compound which produces an ionic complex by reacting with the above-mentioned transition metal compound and subsequently graft polymerizing an ethylenically unsaturated monomer onto the resultant styrenic copolymer.The above-described styrenic graft copolymer is greatly improved in terms of compatibility, adhesivity, coatability and wettability while preserving heat resistance and chemical resistance thereof, and thus effective as a variety of constructional materials and compatibilizing agents.Type: GrantFiled: December 6, 1991Date of Patent: October 5, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Noriyuki Tani, Shuji Machida, Toshinori Tazaki
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Patent number: 5218026Abstract: A fluorine-containing elastomer composition comprising a specific fluorine-containing elastomer having iodine bonded thereto and having a multimodel molecular weight distribution, a specific vulcanizing agent, an organic peroxide, and a polyfunctional unsaturated compound. The fluorine-containing elastomer composition has not only excellent processability, mold release properties and burr-removal performance in molding but also capability of providing a vulcanization product which is not only improved with respect to mechanical properties, but also has extremely excellent resistance to chemicals and solvents, particularly methanol, and good metal-adhesion properties.Type: GrantFiled: December 20, 1990Date of Patent: June 8, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Keiichi Toda, Kenichi Hayashi, Hiroshi Saito
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Patent number: 5203884Abstract: An abrasive article (i.e., a coated abrasive article or a three-dimensional, low density abrasive article) having a sufficient amount of vanadium oxide incorporated therein to provide having a reduced tendency to buildup static electricity during the abrading of a workpiece. Preferably, the abrasive article further comprises a compatible binder (preferably, a sulfonated polymer) to aid in securing the vanadium oxide to the abrasive article. In another aspect, a method of making the same is taught.Type: GrantFiled: June 4, 1992Date of Patent: April 20, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventors: Scott J. Buchanan, Eric D. Morrison, David R. Boston, Steven T. Hedrick, William L. Kausch, Wayne K. Larson
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Patent number: 5177148Abstract: Covulcanizable compositions comprising (A) 55-100% by weight of an elastomeric copolymer of vinylidene fluoride with perfluoropropene optionally tetrafluoroethylene and containing from 0.001 to 2% by weight of bromine; (B) 0-45% by weight of a tetrafluoroethylene and propylene copolymer; (C) 0.7-2.5 parts for 100 parts of mix (A)+(B) of a bisphenol compound; (D) 0.3-1.5 parts for 100 parts of mix (A)+(B) of an organic guaternary compound of ammonium, phosphonium or aminophosphonium; (E) 0.4-5 parts for 100 parts of mix (A)+(B) of an organic peroxide; (F) 1-5% by weight of (A)+(B) of a peroxide cross-linking coagent.Type: GrantFiled: August 23, 1990Date of Patent: January 5, 1993Assignee: Ausimont S.p.A.Inventors: Vincenzo Arcella, Giulio Tommasi, Giulio Brinati, Gianna Cirillo, Fabio Costanzi
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Patent number: 5135997Abstract: This invention relates to a process for the radical homo-or copolymerization of acrylonitrile with one or more copolymerizable monomers under reaction conditions such that the monomers are present predominantly in a gaseous form of an adsorbed form and polymerization of the monomers, which are presumably adsorbed, takes place in the solid phase (solvent-free polymerization) and results in pulverulent PAN-(co)polymers. The process is preferably carried out in the presence of small quantities of a mediator substance such as dimethylformamide which does not alter the pulverulent consistency of the PAN-polymers but leads considerably more rapidly and with much improved yields to freshly formed polyacrylonitrile polymers.Type: GrantFiled: September 14, 1990Date of Patent: August 4, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Heinz Feltgen, Rudiger Franck, Konrad Hable, Siegfried Korte, Manfred Heckenbach
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Patent number: 5106916Abstract: This invention relates to a process for the catalytic grafting of an ethylenically unsaturated monomer onto a copolymer in the presence of a catalyst. The monomer is selected from the group consisting of ethylenically unsaturated carboxylic acids, anhydrides esters and other derivatives thereof. The copolymer is selected from the group consisting of certain copolymers of ethylene and ionomers of such copolymers. The catalyst is a mixture of (a) a certain amount of water and (b) at least one of certain phosphorus-containing compounds. The process comprises admixing copolymer, monomer, catalyst and an organic peroxide at a temperature above the melting point of the copolymer for a period of time so as to obtain a uniform distribution of monomer, catalyst and peroxide in the copolymer. The resultant grafted copolymer has improved color, and is useful in adhesive systems and as a compatibilizer for polymers and other materials.Type: GrantFiled: October 16, 1989Date of Patent: April 21, 1992Assignee: Du Pont Canada Inc.Inventor: David J. Mitchell
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Patent number: 5045593Abstract: Organophilic polymer adducts which are effective fluid loss control additives for oil base well-working fluids are prepared from an anionic or cationic water soluble polymer and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegetable oils, most preferably commercial lecithin. Preferred polymers comprise polysaccharides or derivatives thereof and synthetic polymers.Type: GrantFiled: July 2, 1990Date of Patent: September 3, 1991Assignee: Venture Chemicals, Inc.Inventors: Jack C. Cowan, Roy F. House, Victor M. Granquist
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Patent number: 4978722Abstract: A method for producing a propylene-.alpha.-olefin block copolymer, which comprises polymerizing propylene in the presence of a catalyst and then polymerizing in a gas phase an .alpha.-olefin other than propylene, or propylene and other .alpha.-olefin without deactivating the catalyst, wherein at least one compound selected from the group consisting of an aromatic carboxylic acid ester, a phosphorous ester, an unsaturated dicarboxylic acid diester, an amine compound and an amide compound, is supplied to the latter gas phase polymerization system.Type: GrantFiled: September 15, 1989Date of Patent: December 18, 1990Assignee: Mitsubishi Kasei CorporationInventors: Nobuaki Goko, Yumito Uehara, Hideshige Kato, Yukimasa Matsuda
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Patent number: 4946899Abstract: Block copolymers compose a polyisobutylene rubbery soft segment of M.sub.n of about 5,000 to above 500,000 and glassy hard segments of M.sub.n of about 5,000 or higher and usually about 10,000 to 35,000 or more, are made by preparing a living polymer block of the polyisobutylene and then polymerizing on said living polyisobutylene block the glassy hard segments by adding thereto an electron donor having a donor number of 15 to 50 and then adding and polymerizing the monomers for the glassy hard segments. The monomers for the glassy hard segments are styrene and its derivatives and indene and its derivatives and mixtures thereof.Type: GrantFiled: December 16, 1988Date of Patent: August 7, 1990Assignee: The University of AkronInventors: Joseph P. Kennedy, Judit E. Puskas, Gabor Kaszas, William G. Hager
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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: 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: 4822871Abstract: A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon exhibits improved thermal stability as evidenced by reduced weight loss at elevated temperatures and enhanced crystallinity and crystallizability when produced with a catalyst composition formed from preformed palladium trifluoroacetate and a bidentate phosphine ligand.Type: GrantFiled: December 18, 1987Date of Patent: April 18, 1989Assignee: Shell Oil CompanyInventor: G. Bruce Klingensmith
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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: 4657983Abstract: Radiation curable copolymers useful in coating compositions are prepared by reacting part of the glycidyl groups of a glycidyl acrylate copolymer with acrylic or methacrylic acid followed by esterifying the remaining glycidyl groups with phosphoric acid.Type: GrantFiled: December 5, 1984Date of Patent: April 14, 1987Assignee: Interez, Inc.Inventor: Ronald J. Skiscim
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Patent number: 4596857Abstract: A two part type acrylic adhesive composed of liquid I comprising an acrylate ester monomer, a polymer soluble in the acrylate ester monomer, and an organic peroxide and liquid II containing a hardening accelerator capable of hardening said liquid I by polymerization at a temperature lower than room temperature, wherein at least liquid I contains 0.005 to 0.1% by weight polyphosphoric acid.Type: GrantFiled: November 19, 1984Date of Patent: June 24, 1986Assignee: Okura Kogyo Kabushiki KaishaInventors: Hidemi Doi, Hideaki Matsuda
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Patent number: 4533689Abstract: A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of .alpha.-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.Type: GrantFiled: August 17, 1983Date of Patent: August 6, 1985Assignee: Mitsubishi Rayon Company, LimitedInventors: Suehiro Tayama, Norihisa Kusakawa
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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: 4452944Abstract: Novel structural adhesives for bonding metals and plastics are disclosed. The adhesives, comprising a solution or dispersion of a polymeric material, a monomer which is copolymerizable with such polymeric material and phosphorous-containing compounds are characterized by improved performance at elevated temperatures and excellent resistance to thermal degradation.Type: GrantFiled: February 11, 1982Date of Patent: June 5, 1984Assignee: Lord CorporationInventor: Terrance H. Dawdy
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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: 4433108Abstract: A process for the preparation of styrene homopolymers or copolymers by suspension polymerization of monomers which contain dissolved styrene polymers from a preceding suspension polymerization, in the presence of sparingly soluble metal phosphates as suspension stabilizers, wherein, before the polymerization is started, the monomer phase is dispersed in an aqueous phase, containing a dissolved mineral acid, preferably phosphoric acid, at from 10.degree. to 80.degree. C. for from 5 to 120 minutes, after which the sparingly soluble metal phosphate is formed in situ in the aqueous phase. The process is particularly suitable for the preparation of expandable styrene polymers, in which case a volatile blowing agent is added to the suspension before, during or after polymerization.Type: GrantFiled: June 4, 1982Date of Patent: February 21, 1984Assignee: BASF AktiengesellschaftInventor: Hans G. Keppler
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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: 4293665Abstract: Novel structural adhesive systems for metal-bonding applications. The adhesives, comprising a solution or dispersion of a polymeric material in a monomer copolymerizable therewith having incorporated therein certain phosphorus-containing compounds, are characterized by an unexpected ability of providing strong adhesion to untreated metal surfaces without adversely affecting adhesive performance, including resistance to deleterious environments. The environmental resistance of the herein described adhesives can be further improved by the addition of one or more polybasic lead salts, metal molybdates and metal phosphates.Type: GrantFiled: January 11, 1980Date of Patent: October 6, 1981Assignee: Lord CorporationInventors: Denis J. Zalucha, Frederick H. Sexsmith, Ernest C. Hornaman, Terrance H. Dawdy
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Patent number: 4292414Abstract: A process for preparing a modified block copolymer by graft-reacting at least one maleic acid compound with an aromatic vinyl compound/conjugated diene compound block copolymer containing at least one polymer block mainly composed of a conjugated diene compound and at least one polymer block mainly composed of an aromatic vinyl compound, the aromatic vinyl compound/conjugated diene compound weight ratio being within the range of 5/95 to 97/3, characterized in that said graft-reaction is carried out under conditions wherein the generation of radicals can be substantially inhibited. According to this process, it is possible to prevent gelation of the product in the graft-reaction, and the modified block copolymer obtained has excellent appearance characteristics, mechanical properties, and transparency.Type: GrantFiled: October 29, 1979Date of Patent: September 29, 1981Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Akira Saito, Akio Yamori, Toshio Ibaragi
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Patent number: 4241191Abstract: Styrene polymers are prepared by suspension polymerization using, as suspension stabilizers, mixtures of(A) a sparingly soluble inorganic metal compound and(B) a fine polymer dispersion.The styrene polymers may be used, together with blowing agents, for the manufacture of foams.Type: GrantFiled: November 24, 1978Date of Patent: December 23, 1980Assignee: BASF AktiengesellschaftInventors: Hans G. Keppler, Erhard Stahnecker, Rolf Moeller
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Patent number: 4230832Abstract: Impact modified polyvinyl chloride is prepared by suspension polymerizing vinyl chloride in the presence of a dual catalyst system of a monomer soluble catalyst and a water soluble catalyst to form suspension polymer particles having irregular and porous surfaces, and then polymerizing, in the presence of the porous particles, monomers for forming gelled rubber-containing interpolymer particles having a Tg of less than 25.degree. C. No emulsification system is required for the rubber interpolymerization. Rubber-containing interpolymer particles in the order of 1 micron or less are formed on the surface of the suspension polyvinyl chloride particle. The process can be conducted in one reaction vessel and product contamination is reduced. The product can be used alone or blended with other thermoplastic polymers, such as polyvinyl chloride, to increase the impact strength thereof.Type: GrantFiled: December 2, 1975Date of Patent: October 28, 1980Assignee: Stauffer Chemical CompanyInventor: Chung H. Wei
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Patent number: 4223115Abstract: Novel structural adhesive systems for metal-bonding applications. The adhesives, comprising a solution or dispersion of a polymeric material in a monomer copolymerizable therewith having incorporated therein certain phosphorus-containing compounds, are characterized by an unexpected ability of providing strong adhesion to untreated metal surfaces without adversely affecting adhesive performance, including resistance to deleterious environments. The environmental resistance of the herein described adhesives can be further improved by the addition of one or more polybasic lead salts, metal molybdates and metal phosphates.Type: GrantFiled: April 24, 1978Date of Patent: September 16, 1980Assignee: Lord CorporationInventors: Denis J. Zalucha, Frederick H. Sexsmith, Ernest C. Hornaman, Terrance H. Dawdy
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Patent number: 4208490Abstract: A process for preparing polymer resins by polymerization of at least one ethylenic monomer onto at least one rubbery polymer optionally grafted with at least one ethylenic monomer which comprises initiating the polymerization in an emulsion system, adding a suspension stabilizer to the polymerization system at the stage after the conversion of the ethylenic monomer to be polymerized reaches 5% by weight and before the emulsion system is broken and then continuing the polymerization in a suspension system until completion of the polymerization. By the process, polymer resins can be produced in particles having a beautiful appearance and an even particle size with a narrow range of particle size distribution.Type: GrantFiled: October 25, 1977Date of Patent: June 17, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Masatsune Kondo, Akira Tanoue
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Patent number: 4187202Abstract: A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization.Type: GrantFiled: July 28, 1976Date of Patent: February 5, 1980Assignee: Sumitomo Chemical CompanyInventors: Masatsune Kondo, Akira Tanoue
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Patent number: 4161571Abstract: A process for production of the maleic anhydride adduct of a liquid polymer having a maleic anhydride addition amount of 2 to 70% by weight, which comprises reacting a liquid polymer having a molecular weight of 150 to 5,000 and a viscosity of 2 to 50,000 cp at 30.degree. C. in the presence of at least one compound, as a gelation inhibitor, selected from the group consisting of imidazoles, thiazoles, metallic salts of mercaptothiazoles, urea derivatives, naphthylamines, nitrosamines, iron, iron compounds and specific halogen compounds, said liquid polymer being selected from the group consisting of liquid polybutadienes, liquid polyisoprenes and liquid copolymers comprising units of butadiene or isoprene and units of at least one compound selected from the group consisting of other diolefins, olefins and aromatic vinyl compounds.Type: GrantFiled: October 18, 1977Date of Patent: July 17, 1979Assignee: Sumitomo Chemical Company, LimitedInventors: Seimei Yasui, Takao Oshima