Patents by Inventor Junji Koujina
Junji Koujina 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: 8618205Abstract: Provided is a thermal storage medium composition which contains 100 parts by mass of a hydrogenated diene copolymer and 50 to 4000 parts by mass of a linear paraffin compound having 12 to 50 carbon atoms, where the hydrogenated diene copolymer is a conjugated diene copolymer that is obtained by hydrogenating a block copolymer which includes a polymer block (A) that contains structural units (a-1) derived from a first conjugated diene compound and has a vinyl bond content of not more than 20 mol %, and a polymer block (B) that contains structural units (b-1) derived from a second conjugated diene compound and has a vinyl bond content of 30 to 95 mol %, the hydrogenation ratio with respect to the double bonds derived from the conjugated diene compounds being not less than 90%.Type: GrantFiled: December 24, 2010Date of Patent: December 31, 2013Assignee: JSR CorporationInventors: Masashi Shimakage, Takuya Sano, Toshiyuki Hayakawa, Susumu Komiyama, Junji Koujina
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Publication number: 20120261607Abstract: [Object] The invention provides a thermal storage medium composition capable of forming a thermal storage medium which is free from phase separation or liquid phase bleeding and is excellent in shape retention properties even at or above the maximum crystal transition temperature of a paraffin compound and further exhibits excellent fluidity when being shaped.Type: ApplicationFiled: December 24, 2010Publication date: October 18, 2012Applicant: JSR CORPORATIONInventors: Masashi Shimakage, Takuya Sano, Toshiyuki Hayakawa, Susumu Komiyama, Junji Koujina
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Publication number: 20090099293Abstract: The present invention lies in a flame-retardant rubber composition comprising, as essential components, a synthetic rubber (a component A), a flame-retardant (a component B), sulfur (a component C) and a polyfunctional monomer la component D), wherein an amount of the component B is 10 to 200 parts by masse an amount of the component C is 0.1 to 15 parts by mass and an amount of the component D is 3 to 30 parts by mass, all relative to 100 parts by mass of the component A. It is a technical task of the present invention to provide a flame-retardant rubber composition which has excellent flame retardancy and can give a fully satisfactory mechanical strength (particularly, tensile strength at break) even when subjected to steam cure generally regarded to be difficult to impart a strength.Type: ApplicationFiled: January 19, 2006Publication date: April 16, 2009Applicant: JRS CORPORATIONInventors: Seiji Morioka, Mamoru Hasegawa, Kenji Hasegawa, Junji Koujina
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Publication number: 20070270540Abstract: There is provided a thermoplastic elastomer composition including an ethylene/?-olefin copolymeric rubber (A1) or an extended rubber (X) comprising an ethylene/?-olefin copolymeric rubber (A2) and a mineral oil softener (E2), and a thermoplastic ?-olefin resin (B) comprising a ?-olefinic crystalline thermoplastic resin (B1) and/or a ?-olefinic amorphous thermoplastic resin (B2), an unmodified organopolysiloxane (C), a viny-terminated organopolysiloxane (D), and a mineral oil softener (E1); and molded article produced by forming the thermoplastic elastomer composition. There is provided a thermoplastic elastomer composition and a molded article thereof having excellent molding appearance by imparting an initial sliding ability with an organopolysiloxane having low viscosity and by adding a crosslinked vinylated organopolysiloxane to a thermoplastic elastomer composition to exhibit durable abrasion resistance (long term sliding ability).Type: ApplicationFiled: December 10, 2004Publication date: November 22, 2007Applicant: JSR CorporationInventors: Kentarou Kanae, Hideo Nakanishi, Masato Kobayashi, Junji Koujina
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Publication number: 20060287433Abstract: TPE and TPV excellent in flexibility, compression set and mechanical strength are obtained by using a conjugated diene-based polymer having a sharp molecular weight distribution which is obtained by polymerization using a neodymium-based catalyst. A thermoplastic elastomer composition containing (A) a conjugated diene-based polymer obtained by polymerizing a conjugated diene-based compound using a rare earth element compound-based catalyst and (B) a thermoplastic resin, and a formed article using the same.Type: ApplicationFiled: November 4, 2004Publication date: December 21, 2006Applicant: JSR CorporationInventors: Kentarou Kanae, Hideo Nakanishi, Masato Kobayashi, Junji Koujina
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Patent number: 7077986Abstract: Objects of the present invention are to provide a method for molding polymers to be able to mold products each of which has an outer shape transferred accurately from the shape of the inside of a mold, exhibits high dimensional accuracy and is uniform in the thickness of its surface skin layer and the expansion ratio in its foamed inside. A molten polymer 60 is injected into a cavity 30 and simultaneously gas is pressed to the inside of the molten polymer 60 to contact the polymer close to the surface of the mold, and then gas is exhausted while maintaining the shape inside the mold, to thereby mold a polymer formed product in which a surface skin layer 61 and a foamed inside 62 having cushioning property are formed in one piece.Type: GrantFiled: September 27, 2001Date of Patent: July 18, 2006Assignee: JSR CorporationInventors: Fumio Kurihara, Junji Koujina, Akihiko Morikawa, Akio Aoyama, Masaki Maeda
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Publication number: 20060063850Abstract: A thermoplastic elastomer composition molded article excellent in elasticity and extremely low in permanent compression set is obtained. A thermoplastic elastomer composition molded article obtained by electron beam irradiation of a molded article mainly comprising a thermoplastic elastomer composition in which a crystalline polyethylenic resin (2) and a conjugated diene-based block copolymer (3) form a three-dimensional network structure in a matrix comprising an ethylene•?-olefin-based copolymer (1), and a production process of the thermoplastic elastomer composition molded article comprising mixing an ethylene•?-olefin-based copolymer (1), a crystalline polyethylenic resin (2) and a conjugated diene-based block copolymer (3), dynamically heat treating the resulting mixture to obtain a thermoplastic elastomer composition, molding the thermoplastic elastomer composition, and then, subjecting the resulting molded article to electron beam irradiation.Type: ApplicationFiled: November 16, 2004Publication date: March 23, 2006Inventors: Kentarou Kanae, Monoru Maeda, Motoharu Higuchi, Junji Koujina
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Patent number: 6946089Abstract: The invention relates to a process and apparatus for producing a foamed body that allows simple control of the dimensions and gives foamed body with the desired dimensions in a stable manner. According to the invention, P2 is pressure at the point where pressure in the die begins to fall after casting a molding material containing no blowing agent into the die, ?P2 is the amount of reduction in pressure in the die from P2, P3 is the minimum pressure between the time of casting a molding material containing a blowing agent into the die completely cast and the time of beginning to increase the pressure in the die, ?P3 is the amount of increase in pressure in the die from P3, and ?P4 is the sum of ?P2 and ?P3.Type: GrantFiled: June 13, 2001Date of Patent: September 20, 2005Assignee: JSR CorporationInventors: Hiroyuki Mizouchi, Katsuaki Morino, Junji Koujina
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Publication number: 20040067380Abstract: Disclosed are oil-extended 1,2-polybutadiene containing an extender oil in a specific amount based on 1,2-polybutadiene and a production method thereof, and a composition further containing another (co)polymer, a foaming agent, a crosslinking agent, a softening agent and other additives. The resulting oil-extended 1,2-polybutadiene and the composition thereof has excellent functions characterizing conventional 1,2-polybutadiene and is further excellent in wear resistance, fluidity (processability), coloring properties (high distinctness of images), flexibility, attachability and the like, so that they can be applied to various formed articles, shoe sole materials and laminate having high performances.Type: ApplicationFiled: August 15, 2003Publication date: April 8, 2004Inventors: Masaki Maeda, Junji Koujina, Katsuaki Morino, Teruo Aoyama, Kouji Okada, Minoru Furuichi
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Publication number: 20030168767Abstract: Objects of the present invention are to provide a method for molding polymers to be able to mold products each of which has an outer shape transferred accurately from the shape of the inside of a mold, exhibits high dimensional accuracy and is uniform in the thickness of its surface skin layer and the expansion ratio in its foamed inside.Type: ApplicationFiled: March 31, 2003Publication date: September 11, 2003Inventors: Fumio Kurihara, Junji Koujina, Akihiko Morikawa, Akio Aoyama, Masaki Maeda
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Publication number: 20020195735Abstract: The invention relates to a process and apparatus for producing a foamed body that allows simple control of the dimensions and gives foamed body with the desired dimensions in a stable manner. According to the invention, P2 is pressure at the point where pressure in the die begins to fall after casting a molding material containing no blowing agent into the die, &Dgr;P2 is the amount of reduction in pressure in the die from P2, P3 is the minimum pressure between the time of casting a molding material containing a blowing agent into the die completely cast and the time of beginning to increase the pressure in the die, &Dgr;P3 is the amount of increase in pressure in the die from P3, and &Dgr;P4 is the sum of &Dgr;P2 and &Dgr;P3.Type: ApplicationFiled: April 30, 2002Publication date: December 26, 2002Inventors: Hiroyuki Mizouchi, Katsuaki Morino, Junji Koujina