Phosphorus Directly Bonded To Sulfur Patents (Class 524/146)
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Patent number: 8901218Abstract: Disclosed herein is a branched (meth)acrylate copolymer prepared by polymerizing a monomer mixture comprising (A) about 20 to about 99.999% by weight of a (meth)acrylate monomer having a refractive index higher than methyl methacrylate; (B) about 0 to about 79.999% by weight of a mono-functional unsaturated monomer; and (C) about 0.001 to about 10% by weight of a crosslinking monomer. The copolymer has a refractive index of about 1.495 to about 1.590.Type: GrantFiled: June 2, 2010Date of Patent: December 2, 2014Assignee: Cheil Industries Inc.Inventors: Il Jin Kim, Kee Hae Kwon
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Patent number: 8691896Abstract: Disclosed is a polymer foam with density in the range from 5 to 120 kg/m3 composed of a polymer component including at least one styrene polymer and from 0.1 to 5 parts by weight of a flame retardant mixture including at least one phosphorus compound of the formula PR1R2R3. A process for producing the polymer is also disclosed.Type: GrantFiled: February 7, 2011Date of Patent: April 8, 2014Assignee: BASF SEInventors: Klaus Hahn, Olaf Kriha, Ingo Bellin, Patrick Spies, Sabine Fuchs, Peter Deglmann, Klemens Massonne, Hartmut Denecke, Christoph Fleckenstein, Geert Janssens, Maximilian Hofmann, Manfred Döring, Ciesielski Michael, Jochen Wagner
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Patent number: 8669389Abstract: The invention relates to sulfur silane coupling agents containing multiple blocked mercapto groups which are in a state of reduced activity until activated. The coupling agents are advantageously used in rubber formulations, for example, for fabricating tires with low rolling resistance.Type: GrantFiled: January 18, 2013Date of Patent: March 11, 2014Assignee: Momentive Performance Materials Inc.Inventors: Richard W. Cruse, W. Michael York, Eric R. Pohl, Antonio Chaves, Tiberiu L. Simandan, Prashant Joshi
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Patent number: 8658720Abstract: Disclosed herein is a thermoplastic resin composition that can have improved compatibility by introducing a branched acrylic copolymer to a polycarbonate resin. The thermoplastic resin composition can have good scratch resistance in addition to good colorability and appearance without requiring the addition of a compatibilizer.Type: GrantFiled: September 13, 2010Date of Patent: February 25, 2014Assignee: Cheil Industries Inc.Inventors: Kee Hae Kwon, Il Jin Kim, Hyung Rang Moon
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Patent number: 8383850Abstract: The invention relates to sulfur silane coupling agents containing multiple blocked mercapto groups which are in a state of reduced activity until activated. The coupling agents are advantageously used in rubber formulations, for example, for fabricating tires with low rolling resistance.Type: GrantFiled: June 22, 2010Date of Patent: February 26, 2013Assignee: Momentive Performance Materials Inc.Inventors: Richard W. Cruse, W. Michael York, Eric R. Pohl, Antonio Chaves, Tiberiu L. Simandan, Prashant Joshi
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Patent number: 8242197Abstract: The present disclosure pertains to a blend of aromatic polycarbonate and polylactic acid, the method for preparing the same and the use thereof. In the present invention a transesterification catalyst is added during the preparing process with regard to the blend of aromatic polycarbonate and polylactic acid to improve the compatibility of the components in the blend. The blend of aromatic polycarbonate and polylactic acid is provided with the good mechanical properties, thermal processibility and flame retardance properties, and can be widely applied to mechanical product or parts, electronic equipments and/or parts, construction material and/or commodities.Type: GrantFiled: September 8, 2009Date of Patent: August 14, 2012Assignee: Bayer Materialscience AGInventors: Holger Warth, Sichong Chen, Yuzhong Wang, Yanyan Wang, Hongchao Li
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Publication number: 20120202078Abstract: The present teachings provide a fuser member. The fuser member includes a substrate layer comprising a polyimide polymer and an alkylthiophosphate.Type: ApplicationFiled: February 3, 2011Publication date: August 9, 2012Applicant: XEROX CORPORATIONInventor: Jin Wu
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Patent number: 8119726Abstract: The flame retardant thermoplastic resin composition according to the present invention comprises (A) about 45 to 95 parts by weight of a polycarbonate resin; (B) about 1 to 50 parts by weight of a rubber modified vinyl graft copolymer; (C) about 0 to 50 parts by weight of a vinyl copolymer; (D) about 1 to 30 parts by weight of a mixture of oligomeric phosphoric acid ester compounds consisting of (d1) about 5 to 99% by weight of an oligomeric phosphoric acid ester compound derived from bisphenol-A and (d2) about 1 to 95% by weight of an oligomeric phosphoric acid ester compound derived from resorcinol, per 100 parts by weight of the sum of (A), (B) and (C); and (E) about 0.05˜5 parts by weight of a fluorinated polyolefin resin, per 100 parts by weight of the sum of (A), (B) and (C).Type: GrantFiled: December 27, 2004Date of Patent: February 21, 2012Assignee: Cheil Industries Inc.Inventors: Jong Cheol Lim, Tae Gon Kang, Hyuk Jin Jung
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Patent number: 7968632Abstract: There is provided an antistatic polycarbonate resin composition and molded product formed by melt-molding the said resin composition, which resin composition has totally well balanced excellent properties including heat resistance, in which yellow- or brown-coloring can be prevented even though under melt-kneading step, molding step and such a circumstance that it is used at high temperature for long times, and the fluidity is improved without notably deterioration of mechanical strengths and transparency. A polycarbonate resin composition comprising 100 parts by weight of polycarbonate resin, 0.1 to 5.0 parts by weight of phosphonium sulfonate (A) represented by the following chemical formula (1), 0.1 to 10 parts by weight of aromatic polycarbonate resin oligomer (B) and 0.01 to 8 parts by weight of caprolactone-based polymer (C); and a molded product produced by melt-molding the said polycarbonate resin.Type: GrantFiled: June 5, 2006Date of Patent: June 28, 2011Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Masayuki Akada, Seiichi Takada
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Publication number: 20090186967Abstract: There is provided an antistatic polycarbonate resin composition and molded product formed by melt-molding the said resin composition, which resin composition has totally well balanced excellent properties including heat resistance, in which yellow- or brown-coloring can be prevented even though under melt-kneading step, molding step and such a circumstance that it is used at high temperature for long times, and the fluidity is improved without notably deterioration of mechanical strengths and transparency. A polycarbonate resin composition comprising 100 parts by weight of polycarbonate resin, 0.1 to 5.0 parts by weight of phosphonium sulfonate (A) represented by the following chemical formula (1), 0.1 to 10 parts by weight of aromatic polycarbonate resin oligomer (B) and 0.01 to 8 parts by weight of caprolactone-based polymer (C); and a molded product produced by melt-molding the said polycarbonate resin.Type: ApplicationFiled: June 5, 2006Publication date: July 23, 2009Applicant: Mitsubishi Engineering Plastics CorporationInventors: Masayuki Akada, Seiichi Takada
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Patent number: 7544729Abstract: The present invention relates to a process for producing rubber mixtures, to the rubber mixtures obtainable by the process, to the use of rubber mixtures for producing tires or semi-finished products for tires and crosslinked elastomer molded articles which are obtained by vulcanization of the rubber mixtures produced according to the present invention.Type: GrantFiled: May 23, 2005Date of Patent: June 9, 2009Assignee: Rhein Chemie Rheinau GmbHInventors: Lothar Steger, Thomas Früh, Ludger Heiliger
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Publication number: 20080234646Abstract: The present invention leads to odor-preventing water-absorbing compositions comprising at least one water-absorbing polymer and at least one substituted thiophosphoramide, to processes for their production and also to hygiene articles and their production.Type: ApplicationFiled: July 18, 2006Publication date: September 25, 2008Inventors: Volker Braig, Michael de Marco, Patrick Deck, Oliver Huttenloch, Michael Mauss
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Patent number: 7169333Abstract: The present invention provides an antistatic agent of the formula (I) R—SO3NR?R?R??R?? ??(I) wherein R represents a perfluorinated cyclic or linear, branched or unbranched carbon chain having 1 to 30 carbon atoms, R? represents a cyclic or linear, branched or unbranched carbon chain having 1 to 30 carbon atoms, which is unsubstituted or substituted with halogen, hydroxy, cycloalkyl or alkyl, and R?, R??, R?? independently represent a cyclic or linear, branched or unbranched carbon chain having 1 to 30 carbon atoms, which is unsubstituted or substituted with halogen, hydroxy, cycloalkyl or alkyl, with the proviso that at least one of the radicals R?, R?, R?? and R?? must not represent ethyl. The antistatic agent of the present invention may be incorporated in plastic molding materials to provide antistatic properties thereto.Type: GrantFiled: April 30, 2001Date of Patent: January 30, 2007Assignee: Bayer AktiengesellschaftInventors: Martin Döbler, Walter Köhler, Siegfried Neumann
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Patent number: 7081500Abstract: Blocked mercaptosilanes are provided in which the blocking group contains and unsaturated heteroatom or carbon chemically bound directly to sulfur via a single bond. This blocking group optionally may be substituted with one or more carboxylate ester or carboxylic acid functional groups. These silanes are used in manufacture of inorganic filled rubbers, with the silanes deblocked by a deblocking agent. Synthesis of the blocked mercaptosilanes is also provided.Type: GrantFiled: November 9, 2001Date of Patent: July 25, 2006Assignee: General Electric CompanyInventors: Richard W. Cruse, Robert J. Pickwell, Keith J. Weller, Eric R. Pohl
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Patent number: 6774170Abstract: A heat stabilizing composition for polyolefins comprises an oxidized, non-cationized, non-silylated sulfur black pigment, a hindered phenolic antioxidant a sulfur-containing secondary stabilizer, each in stabilizing amount, and a hindered amine. The heat stabilizing composition yields polyolefin compounds and articles having improved long term heat aging stability. Preferably, the sulfur black pigment is treated by washing, to thereby reduce the concentration of soluble sodium salts.Type: GrantFiled: December 7, 2001Date of Patent: August 10, 2004Assignee: Clariant Finance (BVI) LimitedInventor: Joseph R. Webster
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Patent number: 6590051Abstract: This invention is directed to high molecular weight water-soluble zwitterionic polymers derived from zwitterionic and nonionic monomer units, and to the use of the polymers in papermaking processes.Type: GrantFiled: January 22, 2001Date of Patent: July 8, 2003Assignee: Ondeo Nalco CompanyInventors: Phillip W. Carter, Patrick G. Murray, Larry E. Brammer, Jr., Andrew J. Dunham
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Patent number: 6569929Abstract: The present invention relates to a method for preparing phosphoramides having a glass transition temperature in one embodiment of at least about 0° C., in another embodiment of at least about 10° C., and in still another embodiment of at least about 20° C., the phosphoramides being substantially free of acidic, basic, or halide impurities, or their precursors. The invention also relates to resin compositions comprising at least one thermoplastic resin and at least one phosphoramide having a glass transition temperature of at least about 0° C., wherein the phosphoramide is prepared by the method of the invention.Type: GrantFiled: May 4, 2001Date of Patent: May 27, 2003Assignee: General Electric CompanyInventors: Neal Steven Falcone, John Robert Campbell, James Ross Fishburn
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Patent number: 6538056Abstract: What is disclosed are polyolefin compounds, e.g., polyethylene and polypropylene, and articles therefrom made in by conventional solid, melt-phase compounding with oxidized, non-cationized, non-silylated sulfur black pigment, a phenolic antioxidant and a sulfur-containing secondary stabilizer, each in stabilizing amount, specified below, which provide a synergistic improvement in the long term heat aging of polyolefins. Preferably the sulfur black compound is treated by washing, and reduction in the soluble sodium salts. Also disclosed is melt-phase compounded polyolefin and molded articles made therefrom comprising incorporating of carbon black, oxidized, non-cationized, non-silylated sulfur black pigment, a phenolic antioxidant and sulfur-containing secondary stabilizer.Type: GrantFiled: October 10, 2000Date of Patent: March 25, 2003Assignee: Clariant International Ltd.Inventor: Joseph R. Webster
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Patent number: 6531525Abstract: An abherent composition which contains (A) a compound having C4-C20 perfluoro-alkyl or alkenyl group, (B) polytetrafluoroethylene having a number-average molecular weight of at most 500,000, and (C) at least one compound selected from the group consisting of a silicone oil, a silicone resin and a highly fluorinated compound having a boiling point of at least 100° C. except those included in the components (A) and (B), is disclosed. This composition prevents various articles from adhering to each other and is suitable as a mold release agent, an anti-blocking agent, a stripping agent for an electrical wire and the like.Type: GrantFiled: December 22, 1995Date of Patent: March 11, 2003Assignee: Daikin Industries, Ltd.Inventors: Masayuki Yamana, Tsukasa Aga
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Patent number: 6441070Abstract: The present invention relates to rubber compositions containing an elastomer and a trivalent phosphorous compound-silica complex.Type: GrantFiled: July 14, 2000Date of Patent: August 27, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, David John Zanzig, Robert Charles Hirst
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Patent number: 5939493Abstract: A rubber composition comprising 100 parts by weight of a rubber component which comprises at least one type of rubber selected from the group consisting of natural rubber and diene synthetic rubbers, 0.1 to 10 parts by weight of at least one type of metal dithiophosphate represented by the following general formula, optionally 15 to 85 parts by weight of a reinforcing inorganic filler, and optionally a specific tertiary amine compound in an amount of 0.5 to 15% by weight of the amount of the reinforcing inorganic filler is provided.General formula ##STR1## wherein R.sup.1 and R.sup.3 each independently represents an alkyl group or a cycloalkyl group, M represents an antimony atom, a zinc atom, a copper atom, or an iron atom, and n represents a valency of M.The rubber composition of the present invention exhibits excellent resistance to heat or resistance to heat aging (particularly excellent resistance to hardening and excellent fracture properties).Type: GrantFiled: December 24, 1997Date of Patent: August 17, 1999Assignee: Bridgestone CorporationInventor: Masahiro Hojo
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Patent number: 5936048Abstract: There are herein disclosed a method for preparing a modified resin which comprises thermal/reaction by the use of a norbornenyl group-containing compound typified by norbornenecarboguanamine or its derivative, a method for preparing an epoxy-modified resin which comprises the step of reacting the above-mentioned modified resin and an epoxide, a flame-retarding method, a thermal stabilization method, a compatibilizing method and a surface modification method which comprise utilizing the modified resin, as well as a coating resin composition and an adhesive resin composition containing the modified resin.According to the preparation methods of the present invention, the deterioration of a material scarcely occurs, and a functional group which is excellent in flame retardancy, thermal stability, compatibility and the like can be introduced to the resins.Type: GrantFiled: June 24, 1998Date of Patent: August 10, 1999Assignee: Mitsui Chemicals, Inc.Inventors: Tetsuya Oishi, Kazuo Sugazaki, Jin Suzuki
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Patent number: 5811470Abstract: Compositions and methods are described wherein a styrenic polymer is rendered flame retardant by incorporation therein before, during or after its formation, a combination of (a) at least one organic phosphorus additive that (i) is halogen-free, and (ii) is composed solely of carbon, hydrogen, and phosphorus, and optionally and preferably one or more of the elements nitrogen, oxygen, and sulfur; and (b) elemental sulfur; in proportions such that (i) the sulfur content from b) is less than 2 percent by weight of the weight of the styrenic polymer plus the weight of a) and b), and (ii) the styrenic polymer plus ingredients a) and b) can provide test specimens which exhibit an LOI of at least 24 if tested in accordance with ASTM Standard Test Method D 2863-87.Type: GrantFiled: August 27, 1997Date of Patent: September 22, 1998Assignee: Albemarle CorporationInventors: John C. Prindle, Jr., Christopher J. Nalepa, Govindarajulu Kumar
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Patent number: 5670563Abstract: The invention relates to compositions comprisinga) a chlorine-containing polymerb) at least one organotin compound andc) at least one phosphorus compound of formula(R.sub.7 S).sub.3 P.dbd.X.sub.nwherein the meaning of the individual substituents is as defined in the disclosure.Type: GrantFiled: July 17, 1995Date of Patent: September 23, 1997Assignee: Ciba-Specialty Chemicals CorporationInventors: Horst Zinke, Johannes Kaufhold
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Patent number: 5516827Abstract: Compositions comprising a chlorine-containing polymer and a stabilizer mixture comprising:a) at least one tin alcoholate or tin carboxylate of the formula[(R.sub.2).sub.2 Sn(OR')].sub.2 O (Ia);[(R.sub.2)Sn(OR').sub.2 ].sub.2 O (Ib);(R.sub.2)Sn(OR')O (Ic);[-(R.sub.2)Sn(OR')O--].sub.m (Id);[-(R.sub.1 CO.sub.2 Sn(R.sub.2).sub.2 ].sub.2 O (IIa);or[-(R.sub.2).sub.2 Sn--O.sub.2 C--R.sub.3 --CO.sub.2 --{(R.sub.2).sub.2 SnO{(R.sub.2).sub.2 SnO}.sub.i -].sub.n (IIb);b) at least one organic zinc carboxylate, zinc phenoxide or a tin chloride of the formula[(R.sub.1 CO.sub.2).sub.x (R.sub.2).sub.y CL.sub.z Sn].sub.n O.sub.n-1 (III)andc) at least one thiophosphate or thiophosphite of the formula(R.sub.6 S).sub.3 P.dbd.X.sub.b (IV)where the individual radicals are as defined in claim 1.Type: GrantFiled: January 24, 1995Date of Patent: May 14, 1996Assignee: Ciba-Geigy CorporationInventors: Johannes Kaufhold, Horst Zinke
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Patent number: 5389708Abstract: An internal release agent comprises a sulfur-containing acid phosphoric esters selected from the group consisting of thiophosphoric acid esters and dithiophosphoric acid esters of the formula, ##STR1## where X and Y are independently selected from the group consisting of an oxygen atom and a sulfur atom, at least one of X and Y is a sulfur atom, and R.sub.1 and R.sub.2 are independently alkyl groups.Type: GrantFiled: January 27, 1993Date of Patent: February 14, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Masahiko Kusumoto, Hiroyuki Yamashita, Teruyuki Nagata
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Patent number: 5321080Abstract: A resin composition comprising an olefin resin (A), a copolymer of olefin with non-conjugated diene (B) and at least one polymer (C) selected from the group consisting of the following polymers;C1: diene polymer containing a hydroxyl group or the hydrogenation product thereof,C2: polymer containing a hydroxyl group,C3: polymer containing a carboxyl group (including an acid anhydride group),C4: polymer containing an amino group and/or imino group, andC5: polymer containing an epoxy group; and optionally an elastomer (D), filler (E) and at least one compound (F) selected from the group consisting of the following compounds;F1: organotin compound,F2: tertiary amine compound, andF3: phosphorus oxy compound.The moldings prepared from this resin composition have remarkable adhesive properties for paints, adhesives and printing inks. Thus, paints, etc. may be applied directly to the moldings, without surface treatment or washing thereof.Type: GrantFiled: July 29, 1992Date of Patent: June 14, 1994Assignee: Mitsubishi Petrochemical Company, Ltd.Inventors: Yuta Kumano, Sadao Kitagawa, Mitsushige Baba, Shiroh Gotoh
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Patent number: 4985480Abstract: An inorganic filler-containing polyolefin composition which comprises100 parts by weight of a polyolefin,1-100 parts by weight of an inorganic filler.0.01-1.0 part by weight of a phenolic antioxidant represented by the general formula (I) shown below, andat least one compound selected from the group consisting of the compounds represented by the general formulas (II) to (IV) shown below, and optionally 0.01-1.0 part by weight of a sulfur antioxidant and/or 0.01-2.0 parts by weight of a light stabilizer. ##STR1## wherein R.sub.1 represents an alkyl group of 1-3 carbon atoms,R.sub.2 --CO--NH--(CH.sub.2).sub.n --HN--CO--R.sub.2 (II)wherein R.sub.2 represents an alkyl group or an alkenyl group of 5-21 carbon atoms, and n is an integer of 1 to 6.R.sub.3 --COHN.sub.2 (III)wherein R.sub.3 represents an alkyl group or an alkenyl group of 5-21 carbon atoms. ##STR2## wherein R.sub.Type: GrantFiled: May 8, 1989Date of Patent: January 15, 1991Assignee: Sumitomo Chemical Company, Ltd.Inventors: Yoshiharu Fukui, Kazuhisa Kuroda
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Patent number: 4966931Abstract: The present invention disclosed herein is connected with a polypropylene resin composition giving off no corrosive and poisonous gases, having excellent moldability, providing molded articles with excellent mechanical strength and high flame retardance. The composition of the present invention is composed of predetermined amounts of a polypropylene resin, a polyethylene resin, polyammonium phosphate or polyammonium phosphate modified by melamine resin and a 1,3,5-triazine derivative. This composition may additionally contain a predetermined amount of one or more of specific thiophosphites and may further contain a predetermined amount of an olefinic synthetic rubber or elastomer and a crosslinking agent.Type: GrantFiled: January 19, 1989Date of Patent: October 30, 1990Assignee: Chisso CorporationInventors: Shinichi Akitaya, Toru Fukazawa, Yutaka Nozokido, Nobuchika Tabata
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Patent number: 4900772Abstract: A curable resin composition comprising(A) 100 parts by weight of an elastomeric organic polymer of a saturated hydrocarbon having at least one silicon-containing group cross-linkable by the formation of a siloxane bond at the molecular ends, and(B) 0.01 to 10 parts by weight of a sulfur-containing antioxidant. The curable resin composition produces a cured product having excellent heat resistance.Type: GrantFiled: April 11, 1988Date of Patent: February 13, 1990Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Masayoshi Imanaka, Koji Noda, Katsuhiko Isayama
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Patent number: 4710317Abstract: A flame retardant polyolefin resin composition which, when molded, affords a molded product having highly flame retardant properties, no dripping properties, a smooth surface and an excellent appearance and superior resistances to heavy metal deterioration, heat deterioration and weather is provided, which composition consists of (A) 5-60% by weight of a halogen-containing flame retardant, (B) 100-10% by weight of antimony trioxide based on the weight of the halogen-containing flame retardant, (C) 0.5-15% by weight of a crosslinking agent, (D) 0.05-5% by weight of a specified thiophosphite, and (E) the balance % by weight of a polyolefin resin, the total of the quantities of (A), (B), (C), (D) and (E) being 100% by weight. If necessary, a processing aid may be further added to the above flame retardant polyolefin resin composition.Type: GrantFiled: May 20, 1986Date of Patent: December 1, 1987Assignee: Chisso CorporationInventors: Nobuchika Tabata, Shohji Fukumitsu
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Patent number: 4663079Abstract: A copper-type conductive coating composition which comprises:(A) a copper powder with hydrogen loss of at most 0.2% by weight or a copper powder with its oxidized surface layer removed by treatment with an organic carboxylic acid,(B) a coating binder resin, and(C) an antioxidant selected from triazoles represented by the formula: ##STR1## wherein Y is a hydroxyl group, a hydrogen atom, a C.sub.1 -C.sub.18 alkyl group or a halogen atom, and a is an integer of 1 to 3, and trithiophosphites represented by the formula: ##STR2## wherein each of R.sub.1 to R.sub.3 is a C.sub.1 -C.sub.30 alkyl group or an allyl group.Type: GrantFiled: June 27, 1985Date of Patent: May 5, 1987Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Shoji Yamaguchi, Kimiko Yamada
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Patent number: 4439569Abstract: This invention is directed to a polymeric thermo-sensitive material which comprises a polyamide composition containing compounds of sulphur-contained compounds or phosphorous acid ester, and which is smaller in polarization in the application of direct-current electric field, higher in temperature detection function, does not cause flexibility deterioration due to heating operation and is less in hygroscopicity. A composition containing thiophosphorous acid ester and bis(hydroxyphenyl) sulfide derivative from a group of the phosphorous acid ester is particularly superior in quality.Type: GrantFiled: September 22, 1982Date of Patent: March 27, 1984Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shu Hotta, Yoshio Kishimoto, Wataru Shimotsuma
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Patent number: 4418168Abstract: Improved stability is imparted to suspension and emulsion polymerized dry particulate vinylidene chloride resin by adding thereto a dispersion of an oil insoluble inorganic particulate stabilizing additive in a liquid plasticizer/stabilizer medium with sufficient mixing to ensure generally uniform distribution of the dispersion onto the resin particles. Optionally, a hindered phenol may be incorporated into the dispersion.Type: GrantFiled: March 18, 1982Date of Patent: November 29, 1983Assignee: The Dow Chemical CompanyInventor: Earl H. Johnson