Patents by Inventor Tatsumi Tsuji
Tatsumi Tsuji 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: 6982293Abstract: An olefin type thermoplastic elastomer which satisfies the following formulae (I) to (III): Y??2X+350??(I) X<95??(II) Z?150??(III) where X, Y and Z are as follows: X: JIS A hardness of a molded product as measured in accordance with JIS K6253 (no unit); Y: rate of change in the weight of a molded product measured based on JIS K6258 using IRM903 oil at 120° C. (unit: %); and Z: number of granular structures on an extruded sheet surface (250 mm×1,500 mm) (unit: granular structures).Type: GrantFiled: June 9, 2004Date of Patent: January 3, 2006Assignee: Mitsubishi Chemical CorporationInventors: Gakuji Shin, Tatsumi Tsuji
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Publication number: 20040225067Abstract: An olefin type thermoplastic elastomer which satisfies the following formulae (I) to (III):Type: ApplicationFiled: June 9, 2004Publication date: November 11, 2004Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Gakuji Shin, Tatsumi Tsuji
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Patent number: 6765052Abstract: An olefin type thermoplastic elastomer which satisfies the following formulae (I) to (III): Y≦−2X+350 (I) X<95 (II) Z≦150 (III) where X, Y and Z are as follows: X: JIS A hardness of a molded product as measured in accordance with JIS K6253 (no unit); Y: rate of change in the weight of a molded product measured based on JIS K6258 using IRM903 oil at 120° C. (unit: %); and Z: number of granular structures on an extruded sheet surface (250 mm×1,500 mm) (unit: granular structures).Type: GrantFiled: November 12, 2002Date of Patent: July 20, 2004Assignee: Mitsubishi Chemical CorporationInventors: Gakuji Shin, Tatsumi Tsuji
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Patent number: 6644684Abstract: There is disclosed a hinge type air bag cover for vehicles, produced by molding a thermoplastic elastomer composition comprising: (A) 55 to 80 parts by weight of an olefin-based resin; and (B) 20 to 45 parts by weight of a copolymer rubber of ethylene and an &agr;-olefin having not less than 6 carbon atoms, the total content of said olefin-based resin (A) and sand copolymer rubber (B) being 100 parts by weight, said composition having a melt flow rate of not less than 5 g/10 minutes according to JIS K6758 at 230° C. under load of 21.17N, a flexural modulus of from not less than 550 MPa and less than 800 MPa, and a ratio of tensile break strength to flexural modulus of 0.03:1 to 0.07:1.Type: GrantFiled: September 14, 2001Date of Patent: November 11, 2003Assignee: Mitsubishi Chemical CorporationInventors: Tatsumi Tsuji, Motoko Itou
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Publication number: 20030130400Abstract: An olefin type thermoplastic elastomer which satisfies the following formulae (I) to (III):Type: ApplicationFiled: November 12, 2002Publication date: July 10, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Gakuji Shin, Tatsumi Tsuji
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Patent number: 6476139Abstract: An olefin-based thermoplastic elastomer comprises a propylene-based resin (A) and an olefin-based copolymer rubber (B), and has a ratio (N1/SS) of first normal stress difference (N1) to shear stress (SS) of 0.6:1 to 1.4:1 said first normal stress difference (N1) and shear stress (SS) being determined by subjecting said elastomer to step shear test at a temperature of 200° C. and a shear rate of 25.1 sec−1. Such olefin-based thermoplastic elastomer shows excellent moldability, transferability of embossed patterns and mechanical strength.Type: GrantFiled: March 28, 2001Date of Patent: November 5, 2002Assignee: Mitsubishi Chemical CorporationInventors: Osamu Akaike, Asami Hirashima, Tatsumi Tsuji, Motoko Itou
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Publication number: 20020147281Abstract: There is disclosed a hinge type air bag cover for vehicles, produced by molding a thermoplastic elastomer composition comprising:Type: ApplicationFiled: September 14, 2001Publication date: October 10, 2002Applicant: Mitsubishi Chemical CorporationInventors: Tatsumi Tsuji, Motoko Itou
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Patent number: 6417275Abstract: A propylene-based copolymer composition comprises: 10 to 60% by weight of a polymer component (A) comprising propylene as a main component and having an isotactic index of not less than 90%; and 40 to 90% by weight of a copolymer component (B) comprising propylene and other &agr;-olefin having not more than 8 carbon atoms and containing propylene and ethylene as essential components, the copolymer component containing cold xylene insolubles in an amount of from more than 20 to 70% by weight based on the weight of whole polymers, and cold xylene solubles in an amount of 10 to 60% by weight based on the weight of whole polymers, and cold xylene solubles containing an &agr;-olefin other than propylene in an amount of less than 20% by weight, and the composition being obtained by first producing the component (A) by polymerization and then producing the component (B) by polymerization.Type: GrantFiled: December 6, 2000Date of Patent: July 9, 2002Assignee: Mitsubishi Chemical CorporationInventors: Kenjiro Takayanagi, Tatsumi Tsuji, Shigeo Mizukami
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Publication number: 20010034416Abstract: A propylene-based copolymer composition comprises:Type: ApplicationFiled: December 6, 2000Publication date: October 25, 2001Inventors: Kenjiro Takayanagi, Tatsumi Tsuji, Shigeo Mizukami
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Publication number: 20010028932Abstract: An olefin-based thermoplastic elastomer comprises a propylene-based resin (A) and an olefin-based copolymer rubber (B), and has a ratio (N1/SS) of first normal stress difference (N1) to shear stress (SS) of 0.6:1 to 1.4:1 said first normal stress difference (N1) and shear stress (SS) being determined by subjecting said elastomer to step shear test at a temperature of 200° C. and a shear rate of 25.1 sec−1. Such olefin-based thermoplastic elastomer shows excellent moldability, transferability of embossed patterns and mechanical strength.Type: ApplicationFiled: March 28, 2001Publication date: October 11, 2001Inventors: Osamu Akaike, Asami Hirashima, Tatsumi Tsuji, Motoko Itou
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Patent number: 6294611Abstract: There is provided an olefin thermoplastic elastomer composition comprising the following components (A) and (B), said composition having been produced by first polymerizing a monomer of the component (A) and then polymerizing monomers of the component (B), said composition having such fractionation properties that, in temperature rising elution fractionation in the temperature range of 0 to 140° C. using o-dichlorobenzene as a solvent, the eluate obtained at 0° C. is 35 to 60% by weight based on the total elution weight and the eluate obtained at 80 to 100° C. is 1 to 5% by weight based on the total elution weight: (A) 30 to 60% by weight, based on the whole composition, of a propylene homopolymer component having an isotactic index of not less than 90%; and (B) 40 to 70% by weight, based on the whole composition, of a copolymer of propylene with other &agr;-olefin having 2 to 8 carbon atoms, said copolymer comprising propylene and ethylene as indispensable components.Type: GrantFiled: October 12, 1999Date of Patent: September 25, 2001Assignee: Mitsubishi Chemical CorporationInventors: Kenjiro Takayanagi, Tatsumi Tsuji, Shigeo Mizukami, Shiroh Gotoh
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Patent number: 4333897Abstract: This invention relates to a mold for molding prefoamed material of thermoplastic synthetic resin, in which the foamed product is provided with a smoothened superficial skin layer on the overall surface thereof, a beautiful external appearance and a remarkable strength. The mold according to this invention consists of a pair of molds each of which is provided with an internal wall facing to a cavity and an external wall not facing to the cavity, and either one of or each of which is provided with at least one heating chamber including a steam inlet and a steam outlet both of which are mounted in the external wall. And either one of or each of the two molds is provided with a plurality of steam passages and a surface-heating chamber independent thereof both of which are mounted in the internal wall.Type: GrantFiled: July 16, 1979Date of Patent: June 8, 1982Assignees: Mitsubishi Petrochemical Company Limited, Daisen Industry Company LimitedInventors: Tatsuo Hayashi, Ryouichi Itoh, Tatsumi Tsuji