Patents by Inventor Kyoko Kobayashi
Kyoko Kobayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6723794Abstract: An olefin thermoplastic elastomer composition comprises a crystalline polyolefin resin (A) and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber (B), and optionally a softener (C) and/or an inorganic filler (D), in a specific ratio. The copolymer rubber (B) is prepared by the use of a metallocene catalyst and comprises ethylene, an &agr;-olefin of 3 to 20 carbon atoms and a nonconjugated polyene. This composition ca provide molded products of more excellent tensile strength, elongation at break, elastomeric properties (elongation set, permanent compression set, etc.), heat resistance and low-temperature properties than the conventional non-crosslinked olefin thermoplastic elastomers, even if the composition is in the non-crosslinked form. The composition in the partially or completely crosslinked form can provided molded products of more excellent low-temperature properties, tensile strength, elongation at break and elastomeric properties than the conventional vulcanized rubbers.Type: GrantFiled: February 6, 2002Date of Patent: April 20, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Masaaki Kawasaki, Keiji Okada, Tetsuo Tojo, Kyoko Kobayashi, Yuichi Itoh, Akira Uchiyama, Toshiyuki Tsutsui, Toshihiro Sagane
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Patent number: 6635705Abstract: The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) and at least on rubber (C) selected from polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more or an ethylene-&agr;-olefin copolymer (D) having a density of 0.870 to 0.Type: GrantFiled: November 8, 2001Date of Patent: October 21, 2003Assignee: Mitsui Chemicals, Inc.Inventors: Yuichi Itoh, Kyoko Kobayashi, Akira Uchiyama, Masaaki Kawasaki
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Patent number: 6589664Abstract: The present invention relates to a laminate comprising an olefinic thermoplastic elastomer which comprises: (a) a substratum layer comprising an olefinic thermoplastic elastomer composition (A) having the following characteristics {circle around (1)} to {circle around (3)}: {circle around (1)} 9≦Y−0.43X≦27 (1) wherein X denotes the JIS A-hardness value (a dimensionless value) of the olefinic thermoplastic elastomer composition determined according to the prescription of JIS K6301 and Y represents the compression set value (expressed by %) of the olefinic thermoplastic elastomer composition determined according to the prescription of JIS K6301 under a condition of 70° C.Type: GrantFiled: November 1, 2000Date of Patent: July 8, 2003Assignee: Mitsui Chemicals, Inc.Inventors: Kyoko Kobayashi, Noboru Sakamaki, Akira Uchiyama
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Publication number: 20030109641Abstract: The present invention relates to an olefinic thermoplastic elastomer composition obtainable by dynamically heat treating 5 to 50 parts by weight of a polypropylene resin (A) and 50 to 95 parts by weight of an &agr;-olefinic copolymer (B) having a Mooney viscosity ML1+4 (100° C.) of 60 to 250 in the absence of a crosslinking agent.Type: ApplicationFiled: November 14, 2002Publication date: June 12, 2003Inventors: Kyoko Kobayashi, Yuichi Itou, Takayuki Onogi, akira Uchiyama
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Publication number: 20030096912Abstract: An olefin thermoplastic elastomer composition comprises a crystalline polyolefin resin (A) and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber (B), and optionally a softener (C) and/or an inorganic filler (D), in a specific ratio. The copolymer rubber (B) is prepared by the use of a metallocene catalyst and comprises ethylene, an &agr;-olefin of 3 to 20 carbon atoms and a nonconjugated polyene. This composition ca provide molded products of more excellent tensile strength, elongation at break, elastomeric properties (elongation set, permanent compression set, etc.), heat resistance and low-temperature properties than the conventional non-crosslinked olefin thermoplastic elastomers, even if the composition is in the non-crosslinked form. The composition in the partially or completely crosslinked form can provided molded products of more excellent low-temperature properties, tensile strength, elongation at break and elastomeric properties than the conventional vulcanized rubbers.Type: ApplicationFiled: February 6, 2002Publication date: May 22, 2003Inventors: Masaaki Kawasaki, Keiji Okada, Tetsuo Tojo, Kyoko Kobayashi, Yuichi Itoh, Akira Uchiyama, Toshiyuki Tsutsui, Toshihiro Sagane
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Publication number: 20030065081Abstract: An olefin thermoplastic elastomer composition which is superior in the resistance to oils, heat resistance, formability and flexibility is provided, said elestomer composition comprising the components 1 (A) 40-90 parts by weight of a polypropylene resin having a melt flow rate (determined at 230° C. under a load of 2.16 kg according to ASTM D 1238) of 0.Type: ApplicationFiled: July 22, 2002Publication date: April 3, 2003Inventors: Kyoko Kobayashi, Hiroyasu Yamaoka, Yuichi Itoh, Akira Uchiyama
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Publication number: 20030033959Abstract: Provided is an oil based ink for a ball-point pen comprising at least an alcohol-soluble dye, carbon black, a resin and an organic solvent, wherein the carbon black described above has a DBP oil absorption of 80 cc/100 g or less. The carbon black has preferably a particle diameter of 30 m&mgr; or less and a content of 1 to 15 mass % based on the total amount of the ink.Type: ApplicationFiled: September 6, 2002Publication date: February 20, 2003Inventors: Masaaki Morita, Susumu Suzuki, Toshiaki Takayanagi, Kyoko Kobayashi
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Patent number: 6497960Abstract: The resin composition for a skin member according to the present invention comprises a completely or partially crosslinked olefin thermoplastic elastomer (A) in an amount of 100 parts by weight, an organopolysiloxane (B) having a viscosity (JIS K2283, 25° C.) of not less than 1×106 cSt, preferably 1×106 to 1×108 cSt in an amount of 2 to 20 parts by weight, an organopolysiloxane (C) having a viscosity (JIS K2283, 25° C.) of not less than 10 cSt and less than 1×106 cSt in an amount of 0.5 to 5 parts by weight, and optionally, a polyolefin resin (D) in an amount of 5 to 150 parts by weight and/or a fluoropolymer (E) in an amount of 0.5 to 10 parts by weight. The other resin composition for a skin member according to the invention comprises a completely or partially crosslinked olefin thermoplastic elastomer (A) in an amount of 100 parts by weight, a fluoropolymer (E) in an amount of 0.Type: GrantFiled: July 20, 1999Date of Patent: December 24, 2002Inventors: Kyoko Kobayashi, Masato Karaiwa, Kunihiko Mizumoto, Akira Uchiyama
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Publication number: 20020155275Abstract: The foamed laminate based on olefin according to the present invention is composed of a substrate layer of a foamed body made of either an ethylenic thermoplastic elastomer comprising a polyethylene resin and an ethylene/&agr;-olefin copolymer having a Mooney viscosity ML1+4 (100° C.) of 90-250 and an ethylene content of 70-95 mole % or an ethylenic thermoplastic elastomer composition comprising 100 parts by weight of an olefinic thermoplastic elastomer and 1-20 parts by weight of an olefinic thermoplastic resin and, under lamination thereon, a skin layer made of either an ultrahigh molecular weight polyolefin resin having an intrinsic viscosity of 3.5-8.3 dl/g or made of an olefinic thermoplastic elastomer composition comprising an olefinic thermoplastic elastomer and a lubricant.Type: ApplicationFiled: February 28, 2002Publication date: October 24, 2002Inventors: Kyoko Kobayashi, Akira Uchiyama
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Publication number: 20020055591Abstract: The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) and at least on rubber (C) selected from polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more or an ethylene-&agr;-olefin copolymer (D) having a density of 0.870 to 0.Type: ApplicationFiled: November 8, 2001Publication date: May 9, 2002Applicant: MITSUI CHEMICALS, INC.Inventors: Yuichi Itoh, Kyoko Kobayashi, Akira Uchiyama, Masaaki Kawasaki
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Patent number: 6221963Abstract: A thermoplastic elastomer based on olefin which can be produced simply by melt-kneading 5-60% by weight of a polyethylene resin (A) together with 40-95% by weight of an ethylene/&agr;-olefin copolymer (B) with optional subsidiary component(s) before the kneaded mass is molded into a formed product, the said elastomer being capable of recycling for reclamation and exhibiting the following characteristics {circle around (1)} to {circle around (3)} namnely, 9≦Y−0.43 X≦27 (1) {circle around (1)} in which X denotes the JIS A-hardness value (a dimensionless value) of the thermoplastic elastomer based on olefin determined according to the prescription of JIS K 6301 and Y represents the permanent compressive strain value (expressed by %) of the thermoplastic elastomer based on olefin determined according to the prescription of JIS K 6301 under a condition of 70° C.Type: GrantFiled: June 28, 1999Date of Patent: April 24, 2001Assignee: Mitsui Chemicals, Inc.Inventors: Kyoko Kobayashi, Akira Uchiyama
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Patent number: 6146739Abstract: A glass run channel comprising a glass run channel body composed of a bottom wall and side walls extending from two opposite edges of the bottom wall, the glass run channel body having a substantially U-shaped section and provided with a groove, and tonguelike draining parts protruding from vicinities of distal edges of the side walls toward the bottom wall of the glass run channel body so as to become proximate to each other. Each of the tonguelike draining parts has a window glass contact part composed of a surface to be brought into contact with a window glass, which comprises a layer of a thermoplastic elastomer and a layer of an ultrahigh molecular weight polyolefin composition. The layer of ultrahigh molecular weight polyolefin composition is arranged so as to contact a window glass. The ultrahigh molecular weight polyolefin composition comprises at least a polyolefin (composition) having a specified intrinsic viscosity and an olefinic thermoplastic elastomer.Type: GrantFiled: February 20, 1998Date of Patent: November 14, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Yuichi Itoh, Masato Karaiwa, Kyoko Kobayashi, Akira Uchiyama
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Patent number: 5972394Abstract: A method of preparing a fermented soybean milk comprising subjecting a soybean milk to fermentations with yeast and lactic acid bacteria, and subjecting the resulting fermented soybean milk to a deactivation treatment to deactivate the yeast and bacteria by heating and a removal treatment to remove alcohol and carbon dioxide gas contained therein. As a result, a fermented soybean milk which is a beverage suiting everybody's taste, and a packed product thereof which is not subject to expansion or deformation during storage, are obtained.Type: GrantFiled: July 30, 1998Date of Patent: October 26, 1999Assignee: Murusan-Ai Co. Ltd.Inventors: Takako Kato, Daisuke Inoue, Kyoko Kobayashi
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Patent number: 5869563Abstract: The ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber composition of the present invention comprises in specified proportions a crystalline polyolefin resin (A) and an ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber (B) composed of ethylene, an .alpha.-olefin having 3 to 20 carbon atoms and a specific branched chain polyene compound. The molar ratio of ethylene units to .alpha.-olefin units, iodine value and intrinsic viscosity ?.eta.! of the ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber (B) are within respective specified ranges. This rubber composition is excellent in low temperature properties. When the above olefinic thermoplastic elastomer composition is partially or entirely crosslinked, a molding can be provided which is superior to the conventional vulcanized rubbers in low temperature properties, tensile strength, elongation at break and rubber properties.Type: GrantFiled: June 12, 1996Date of Patent: February 9, 1999Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masaaki Kawasaki, Hidenari Nakahama, Tetsuo Tojo, Toshiyuki Tsutsui, Kyoko Kobayashi, Toshihiro Sagane
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Patent number: 5856399Abstract: The thermoplastic elastomer composition of the invention comprises a crystalline polyolefin resin (A), an olefin rubber (B), a hydrogenated styrene block copolymer (C), a softener (D), and optionally, a peroxide non-crosslinked type hydrocarbon rubber (E) in a specific amount of each, and has a gel content of not less than 97%. This composition may be mixed with a crystalline polyolefin resin. The thermoplastic elastomer composition has excellent moldability and is able to provide a molded product having excellent elastomeric properties, high resistance to permanent compression set and good appearance. In particular, a composition obtained by mixing this thermoplastic elastomer composition and a crystalline polyolefin resin shows excellent moldability.Type: GrantFiled: April 19, 1996Date of Patent: January 5, 1999Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yuichi Itoh, Kyoko Kobayashi, Akira Uchiyama
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Patent number: 5756575Abstract: The ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber composition of the present invention comprises in specified proportions a crystalline polyolefin resin (A) and an ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber (B) composed of ethylene, an .alpha.-olefin having 3 to 20 carbon atoms and a specific branched chain polyene compound. The molar ratio of ethylene units to .alpha.-olefin units, iodine value and intrinsic viscosity ?.eta.! of the ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber (B) are within respective specified ranges. This rubber composition is excellent in low temperature properties. When the above olefinic thermoplastic elastomer composition is partially or entirely crosslinked, a molding can be provided which is superior to the conventional vulcanized rubbers in low temperature properties, tensile strength, elongation at break and rubber properties.Type: GrantFiled: June 12, 1996Date of Patent: May 26, 1998Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Masaaki Kawasaki, Hidenari Nakahama, Tetsuo Tojo, Toshiyuki Tsutsui, Kyoko Kobayashi, Toshihiro Sagane
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Patent number: 5702827Abstract: Olefin thermoplastic elastomers which comprise a partially crosslinked thermoplastic elastomer comprising a crystalline polyolefin resin (A), a block copolymer (B) which is composed of a polymer block of styrene or its derivative and a specific isoprene polymer block, and an olefin rubber (C), and thermoplastic elastomer laminates, having a substrate formed from a specific olefin thermoplastic elastomer or a crystalline polyolefin resin and a skin layer formed from the above-mentioned olefin thermoplastic elastomer, which are excellent in mechanical strength, heat resistance, heat aging resistance, weathering resistance and scratch resistance have been provided by the present invention.Type: GrantFiled: June 2, 1995Date of Patent: December 30, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yuichi Itoh, Kyoko Kobayashi, Akira Uchiyama, Toru Takehara
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Patent number: 5621021Abstract: The present invention provides an erasable writing ink composition which can be erased with an eraser after writing. The erasable writing ink composition of the present invention comprises 2 to 50% by weight of a resin selected from the group consisting of styrene-butadiene rubber and an acrylonitrile-butadiene rubber having a film-forming temperature of 0.degree. C. or less or a glass transition temperature of 0.degree. C. or less, 0 to 5% by weight of a surface active agent, 1 to 50% by weight of colored spherical fine particles and 20 to 97% by weight of water.Type: GrantFiled: January 28, 1993Date of Patent: April 15, 1997Assignee: Mitsubishi Pencil Kabushiki KaishaInventors: Koji Yoshioka, Yasuaki Ogiwara, Mitsuhiko Furusawa, Kyoko Kobayashi
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Patent number: 5596042Abstract: Olefin thermoplastic elastomers which comprise a partially crosslinked thermoplastic elastomer comprising a crystalline polyolefin resin (A), a block copolymer (B) which is composed of a polymer block of styrene or its derivative and a specific isoprene polymer block, and an olefin rubber (C), and thermoplastic elastomer laminates, having a substrate formed from a specific olefin thermoplastic elastomer or a crystalline polyolefin resin and a skin layer formed from the above-mentioned olefin thermoplastic elastomer, which are excellent in mechanical strength, heat resistance, heat aging resistance, weathering resistance and scratch resistance have been provided by the present invention.Type: GrantFiled: April 4, 1996Date of Patent: January 21, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yuichi Itoh, Kyoko Kobayashi, Akira Uchiyama, Toru Takehara