Patents by Inventor Hironobu Shigematsu
Hironobu Shigematsu 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: 8399104Abstract: The present invention provides a composite molded article and a method for producing the same. The composite molded article comprises a molded article of an olefin thermoplastic elastomer (A) and a molded article of an olefin thermoplastic elastomer (B) fused to each other, wherein the olefin thermoplastic elastomer molded article (A) contains an olefin thermoplastic elastomer composition (A?) having less than 5% by weight of a cyclohexane-soluble(s) and less than 35% of a compression set (JIS K6262, 70° C., 22 hours), and the olefin thermoplastic elastomer molded article (B) contains an olefin thermoplastic elastomer composition (B?) obtained by blending 100 parts by weight of an ethylene/?-olefin/non-conjugated diene copolymer rubber (b-1) containing 6 to 15 wt % of a non-conjugated diene unit, with 40 to 150 parts by weight of a mineral oil softener (b-2), 5 to 150 parts by weight of an olefin resin (b-3), and 0.Type: GrantFiled: March 21, 2008Date of Patent: March 19, 2013Assignee: Sumitomo Chemical Company, LimitedInventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Patent number: 8173746Abstract: A method for producing an olefinic thermoplastic elastomer comprising mixing 100 parts by weight of an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and based on 100 parts by weight of the olefin copolymer rubber (A), 11 to 50 parts by weight of a volatile organic solvent (B) and 5 to 150 parts by weight of an olefin resin (C), and removing from the mixture the volatile organic solvent (B) while kneading in an extruder.Type: GrantFiled: December 19, 2007Date of Patent: May 8, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Patent number: 8143349Abstract: A method for producing an olefinic thermoplastic elastomer comprising the steps of kneading an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, a volatile organic solvent (B) and, an olefin resin (C) in an extruder, removing the volatile organic solvent (B) while kneading, then adding a crosslinking agent (E) and further removing the volatile organic solvent (B) while kneading in the extruder to obtain the olefinic thermoplastic elastomer.Type: GrantFiled: December 19, 2007Date of Patent: March 27, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Patent number: 7989542Abstract: A process for producing a thermoplastic elastomer composition comprising the steps of (1) heating dynamically (A) a defined ethylene-?-olefin random copolymer rubber, (B) a propylene homopolymer, or a defined copolymer of propylene with ethylene and/or an ?-olefin, (C) a mineral oil softener, and (D) a crosslinking agent, and (2) melt-kneading the resultant product with a defined polypropylene resin (E); and a process for producing a foamed thermoplastic elastomer composition comprising the further step of melt-kneading said thermoplastic elastomer composition with (F) a foaming agent.Type: GrantFiled: December 5, 2005Date of Patent: August 2, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Patent number: 7718272Abstract: A laminated product comprising (i) a layer containing a sulfur-vulcanized rubber composition, and (ii) a layer containing a thermoplastic elastomer composition produced by dynamically heating (A) an ethylene-?-olefin copolymer rubber, (B) a propylene resin, (C) a mineral oil, (D) a cross-linking agent, and (E) an ethylene resin; and a process for producing a laminated product comprising the steps of (1) dynamically heating the above components (A) to (E), and (2) laminating the above layers (i) and (ii).Type: GrantFiled: July 12, 2005Date of Patent: May 18, 2010Assignee: Sumitomo Chemical Company LimitedInventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Publication number: 20100112366Abstract: The present invention provides a composite molded article and a method for producing the same. The composite molded article comprises a molded article of an olefin thermoplastic elastomer (A) and a molded article of an olefin thermoplastic elastomer (B) fused to each other, wherein the olefin thermoplastic elastomer molded article (A) contains an olefin thermoplastic elastomer composition (A?) having less than 5% by weight of a cyclohexane-soluble(s) and less than 35% of a compression set (JIS K6262, 70° C., 22 hours), and the olefin thermoplastic elastomer molded article (B) contains an olefin thermoplastic elastomer composition (B?) obtained by blending 100 parts by weight of an ethylene/?-olefin/non-conjugated diene copolymer rubber (b-1) containing 6 to 15 wt % of a non-conjugated diene unit, with 40 to 150 parts by weight of a mineral oil softener (b-2), 5 to 150 parts by weight of an olefin resin (b-3), and 0.Type: ApplicationFiled: March 21, 2008Publication date: May 6, 2010Applicant: Sumitomo Chemical Company LimitedInventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Publication number: 20100010155Abstract: A method for producing an olefinic thermoplastic elastomer comprising the steps of kneading an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, a volatile organic solvent (B) and, an olefin resin (C) in an extruder, removing the volatile organic solvent (B) while kneading, then adding a crosslinking agent (E) and further removing the volatile organic solvent (B) while kneading in the extruder to obtain the olefinic thermoplastic elastomer.Type: ApplicationFiled: December 19, 2007Publication date: January 14, 2010Applicant: SUMITOMO CHEMICAL COMPANY , LIMITEDInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Publication number: 20100004400Abstract: A method for producing an olefinic thermoplastic elastomer comprising mixing 100 parts by weight of an olefin copolymer rubber (A) obtained by polymerizing ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and based on 100 parts by weight of the olefin copolymer rubber (A), 11 to 50 parts by weight of a volatile organic solvent (B) and 5 to 150 parts by weight of an olefin resin (C), and removing from the mixture the volatile organic solvent (B) while kneading in an extruder.Type: ApplicationFiled: December 19, 2007Publication date: January 7, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kazuyoshi Fuse, Hironobu Shigematsu, Takeshi Tominaga
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Publication number: 20080021145Abstract: It is an object of the present invention to provide an olefin thermoplastic elastomer composition which, through dynamic crosslinking of an olefin resin and an ethylene-?-olefin copolymer rubber as polymer components, has excellent appearance of the extrusion molding while also having excellent physical properties such as compression set and tensile strength. The present invention is directed to a method for producing a thermoplastic elastomer composition having the steps of: dynamically heat treating the following components (A) to (D); adding a component (E) to a resulting composition; and kneading the resulting mixture, and a thermoplastic elastomer composition obtained by the production method, (A): 40 to 95 parts by weight of an ethylene-?-olefin-based copolymer rubber; (B): 5 to 60 parts by weight of a polyolefin-based resin; (C): 0.1 to 20 parts by weight of a halogenated alkylphenolic resin-based crosslinking agent; (D): 0.001 to 0.7 part by weight of iron oxide; and (E): 0.Type: ApplicationFiled: July 2, 2007Publication date: January 24, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kohichi Iketani, Hironobu Shigematsu, Nobuhiro Natsuyama
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Publication number: 20080009588Abstract: It is an object of the present invention to provide a method for producing an olefin thermoplastic elastomer composition which, through dynamic crosslinking of an olefin resin and an ethylene-?-olefin copolymer rubber as polymer components, has excellent appearance of the extrusion molding while also having excellent physical properties such as compression set, oil resistance and tensile strength. The present invention is directed to a method for producing a thermoplastic elastomer composition having the steps of: dynamically heat treating the following components (A) to (D); adding a component (E) to a resulting composition; and kneading a resulting mixture, (A): an ethylene-?-olefin-based copolymer rubber; (B): a polyolefin resin; (C): a halogenated alkylphenolic resin-based crosslinking agent; (D): zinc oxide; and (E): a halogen capturing agent.Type: ApplicationFiled: July 2, 2007Publication date: January 10, 2008Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kohichi Iketani, Hironobu Shigematsu, Nobuhiro Natsuyama
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Publication number: 20060211812Abstract: A process for producing a thermoplastic elastomer composition comprising the steps of (1) heating dynamically (A) a defined ethylene-?-olefin random copolymer rubber, (B) a propylene homopolymer, or a defined copolymer of propylene with ethylene and/or an ?-olefin, (C) a mineral oil softener, and (D) a crosslinking agent, and (2) melt-kneading the resultant product with a defined polypropylene resin (E); and a process for producing a foamed thermoplastic elastomer composition comprising the further step of melt-kneading said thermoplastic elastomer composition with (F) a foaming agent.Type: ApplicationFiled: December 5, 2005Publication date: September 21, 2006Inventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Publication number: 20060073351Abstract: A laminated product comprising (i) a layer containing a sulfur-vulcanized rubber composition, and (ii) a layer containing a thermoplastic elastomer composition produced by dynamically heating (A) an ethylene-?-olefin copolymer rubber, (B) a propylene resin, (C) a mineral oil, (D) a cross-linking agent, and (E) an ethylene resin; and a process for producing a laminated product comprising the steps of (1) dynamically heating the above components (A) to (E), and (2) laminating the above layers (i) and (ii).Type: ApplicationFiled: July 12, 2005Publication date: April 6, 2006Inventors: Nobuhiro Natsuyama, Hironobu Shigematsu
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Patent number: 6500561Abstract: An automobile weatherstripping includes an extrusion-formed part and a mold-formed part, the mold-formed part being welded and integrated with the extrusion-formed part. The extrusion-formed part is made of an olefin elastomer and the mold-formed part is made of a resin composition containing an olefin resin, ethylene-&agr;-olefin copolymer rubber, hydrogenated aromatic vinyl conjugated diene compounds block copolymer mineral oil and at least one of natural rubber and butadiene rubber in predetermined proportions. The extrusion-formed part and the mold-formed part have a sufficient level of bonding strength with no bonding agent layer being used therebetween.Type: GrantFiled: March 24, 1998Date of Patent: December 31, 2002Assignees: Toyoda Gosei Co., Ltd., Sumitomo Chemical Company, LimitedInventors: Toru Yoshida, Masayoshi Ichikawa, Masanori Aritake, Hironobu Shigematsu, Hiroshi Ooyama, Tatsuo Hamanaka
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Patent number: 6499256Abstract: A weather strip comprises an extruded part and a molded part which is connected to the extruded part. The molded part is molded from a material containing a solid particle antifriction material and has 1 to 50 &mgr;m of ten points average surface roughness (Rz) on the surface of the molded part. The material is a thermoplastic elastomer or a soft resin.Type: GrantFiled: August 3, 1999Date of Patent: December 31, 2002Assignees: Toyoda Gosei Co., Ltd., Sumitomo Chemical Co., LimitedInventors: Masanori Aritake, Hironobu Shigematsu, Nobuhiro Natsuyama
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Patent number: 6441093Abstract: A thermoplastic elastomer composition for calender-molding obtained by dynamically heat-treating a mixture comprising 40 to 95% by weight of (A) an oil-extended olefin copolymer rubber containing 100 parts by weight of an olefin copolymer rubber having a Mooney viscosity (ML1+4100° C.) of 120 to 350 and 20 to 150 parts by weight of mineral oil softening agent and 60 to 5% by weight of (B) a polypropylene resin, a process for producing a calendered sheet from the composition and a sheet obtained by the process.Type: GrantFiled: February 1, 2001Date of Patent: August 27, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Takeshi Tominaga, Nobuhiro Natsuyama, Hironobu Shigematsu, Tatsuo Hamanaka, Makoto Makino
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Patent number: 6399709Abstract: There are provided: (i) a process for producing a thermoplastic elastomer composition, which comprises the step of feeding rubber and a thermoplastic resin through feed throats independent of one another, respectively, to an extruder to perform melt kneading thereof, wherein the feed throats are connected to the extruder; and (ii) a thermoplastic elastomer composition having a haze value of a glass plate of not higher than about 2%, provided that the haze value is measured with use of an apparatus according to regulations prescribed in ISO 6452 after a lapse of heating time of 20 hours at a heating temperature of 100° C.Type: GrantFiled: February 18, 2000Date of Patent: June 4, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Tsuyoshi Moriguchi, Hironobu Shigematsu, Noboru Komine
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Publication number: 20010018475Abstract: A thermoplastic elastomer composition for calender-molding obtained by dynamically heat-treating a mixture comprising 40 to 95% by weight of (A) an oil-extended olefin copolymer rubber containing 100 parts by weight of an olefin copolymer rubber having a Mooney viscosity (ML1+4100° C.) of 120 to 350 and 20 to 150 parts by weight of mineral oil softening agent and 60 to 5% by weight of (B) a polypropylene resin, a process for producing a calendered sheet from the composition and a sheet obtained by the process.Type: ApplicationFiled: February 1, 2001Publication date: August 30, 2001Inventors: Takeshi Tominaga, Nobuhiro Natsuyama, Hironobu Shigematsu, Tatsuo Hamanaka, Makoto Makino
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Patent number: 6110546Abstract: An automobile weather strip including at least (a) a weather strip body formed from a first composition including at least one rubber polymer and at least one chemical suitable for effecting sulfur-vulcanization, and (b) a decorative layer formed from a second composition including at least one thermoplastic elastomer and hydrotalcite as a discoloration-preventing agent for the decorative layer. The decorative layer is directly adhered onto the weather strip body.Type: GrantFiled: January 17, 1997Date of Patent: August 29, 2000Assignees: Toyoda Gosei Co., Ltd, Sumitomo Chemical Company, LimitedInventors: Hidenobu Honda, Masayoshi Ichikawa, Katsumi Nakashima, Hironobu Shigematsu, Hiroshi Ooyama, Takashi Sakakibara
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Patent number: 5597860Abstract: The present invention provides a vulcanizable rubber composition comprising 100 parts by weight of a polymer component consisting of 30 to 80 wt. % of an ethylene.cndot..alpha.-olefin.cndot.non-conjugated diene copolymer having a Mooney viscosity of 10 to 100 (ML.sub.1+4 100.degree. C.) and an iodine value of 20 to 45 and containing ethylene and .alpha.-olefin in a weight ratio of 50:50 to 90:10, and 20 to 70 wt. % of a styrene-conjugated diolefin block copolymer, 20 to 150 parts by weight of a reinforcing filler, 3 to 30 parts by weight of sulfur, 0 to 50 parts by weight of a styrene resin and 0 to 100 parts by weight of an extending oil.Type: GrantFiled: July 21, 1995Date of Patent: January 28, 1997Assignees: Sumitomo Chemical Company Limited, Toyoda Gosei Co., Ltd.Inventors: Masashi Aoshima, Hironobu Shigematsu, Takeru Wadaki, Toshikatsu Kanehara, Kazuya Watanabe, Toshiyuki Tanaka
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Patent number: 5300579Abstract: A vulcanizable rubber composition comprising an ethylene-.alpha.-olefin copolymer modified with an alkenyl aromatic compound alone or in combination with at least one other polymerizable compound, as a polymer component. The vulcanizable rubber composition is excellent in weather-resistance, ozone-resistance and heat-resistance and has a high strength, a high rigidity and a high hardness.Type: GrantFiled: April 14, 1992Date of Patent: April 5, 1994Assignee: Sumitomo Chemical Company, LimitedInventors: Masashi Aoshima, Hironobu Shigematsu, Takeru Wadaki, Mitsuji Tsuji