Patents by Inventor Hajime Nishihara
Hajime Nishihara 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).
-
Patent number: 7863378Abstract: A thermoplastic elastomer composition comprising a thermoplastic vulcanized olefin elastomer (A) and an aromatic vinyl random copolymer (B), wherein the (A) component is a thermoplastic vulcanized elastomer composed of an ethylene-?-olefin copolymer (A-1) and a thermoplastic non-vulcanizable polymer (A-2) and the (B) component is a hydrogenated copolymer rubber composed mainly of random bonding which has an olefinic double bond hydrogenation ratio of 50% or more and comprises 10 to 49% by weight of a conjugated diene monomer and 51 to 90% by weight of an aromatic vinyl monomer.Type: GrantFiled: August 31, 2006Date of Patent: January 4, 2011Assignee: Asahi Kasei Chemicals CorporationInventors: Hajime Nishihara, Toshikazu Hoshina
-
Patent number: 7491771Abstract: A process for producing a partially or completely crosslinked olefinic rubber composition which comprises (A) 1 to 99 parts by weight of an ethylene-?-olefin copolymer having ethylene units and C3-C20 ?-olefin units, and (B) 1 to 99 parts by weight of an olefinic resin, total amount of (A) and (B) being 100 parts by weight, said (A) having a degree of crosslinking of 50% or more and a degree of swelling of 5 to 40.Type: GrantFiled: June 22, 2006Date of Patent: February 17, 2009Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara
-
Patent number: 7488776Abstract: A thermoplastic crosslinked rubber composition comprising (A) from 1 to 99 parts by weight of a hydrogenated rubber obtained by hydrogenating not less than 50% of total double bonds of at least one homopolymer rubber of a conjugated diene type monomer or a random copolymer rubber consisting of a conjugated diene type monomer unit and an aromatic vinyl monomer unit and (B) from 1 to 99 parts by weight of an olefinic thermoplastic resin, total amount of (A) and (B) being 100 parts by weight, said (A) being partially or completely crosslinked, wherein said (A) is crystalline rubber, having a crystallization temperature in a range of from ?50 to 70° C. and a heat quantity of crystallization at peak in a range of from 3 to 100 J/g in differential scanning calorimetry (DSC method).Type: GrantFiled: March 19, 2003Date of Patent: February 10, 2009Assignee: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Yoshikazu Suda, Ikuji Ohtani, Sigeru Sasaki
-
Publication number: 20080058471Abstract: A thermoplastic elastomer composition comprising a thermoplastic vulcanized olefin elastomer (A) and an aromatic vinyl random copolymer (B), wherein the (A) component is a thermoplastic vulcanized elastomer composed of an ethylene-?-olefin copolymer (A-1) and a thermoplastic non-vulcanizable polymer (A-2) and the (B) component is a hydrogenated copolymer rubber composed mainly of random bonding which has an olefinic double bond hydrogenation ratio of 50% or more and comprises 10 to 49% by weight of a conjugated diene monomer and 51 to 90% by weight of an aromatic vinyl monomer.Type: ApplicationFiled: August 31, 2006Publication date: March 6, 2008Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Hajime Nishihara, Toshikazu Hoshina
-
Patent number: 7247678Abstract: A vulcanized rubbery polymer composition comprising a component (A) and a thermoplastic resin (B), wherein the component (A) comprises a hydrogenated copolymer (A-1), which is obtained by hydrogenating a copolymer comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of not less than 5% by weight and not more than 90% by weight, and which has a crystallization peak calorie measured by a differential scan calorimetry of not more than 2 J/g, and at least one vulcanizable rubber (A-2) selected from the group consisting of a copolymer (a1) comprising an ethylene unit and an ?-olefin unit of 3 to 20 carbon atoms and a hydrogenated rubber (a2) obtained from a homopolymer rubber of at least one conjugated diene monomer or a copolymer rubber comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of less than 5% by weight.Type: GrantFiled: June 6, 2003Date of Patent: July 24, 2007Assignee: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Takeshi Yasui
-
Patent number: 7226974Abstract: A vulcanized thermoplastic olefinic rubber composition comprising at least one vulcanizable rubber (A) selected from the group consisting of ethylene-?-olefin copolymers, which contain an ethylene unit and a unit of an ?-olefin having 3 to 20 carbon atoms, and which are produced with use of a metallocene catalyst, and an olefinic resin (B), wherein X and Y as defined below of said (A) are from 1 to 40% and from 0.02 to 0.5, respectively, X=(W2/W0)×100(%) Y=W2/W1 wherein W1 is a weight of a swollen vulcanized rubber (A), which is obtained when (A) in an amount of W0 is extracted with hot xylene, and W2 is a weight measured after drying of the above-mentioned swollen vulcanized rubber (A).Type: GrantFiled: March 7, 2003Date of Patent: June 5, 2007Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara
-
Publication number: 20060235155Abstract: A process for producing a partially or completely crosslinked olefinic rubber composition which comprises (A) 1 to 99 parts by weight of an ethylene-?-olefin copolymer having ethylene units and C3-C20 ?-olefin units, and (B) 1 to 99 parts by weight of an olefinic resin, total amount of (A) and (B) being 100 parts by weight, said (A) having a degree of crosslinking of 50% or more and a degree of swelling of 5 to 40.Type: ApplicationFiled: June 22, 2006Publication date: October 19, 2006Inventor: Hajime Nishihara
-
Patent number: 6846872Abstract: An elastomer composition comprising a softening agent (A) comprising a naphthenic hydrocarbon and optionally at least one selected from the group consisting of an aromatic hydrocarbon and a paraffinic hydrocarbon, and an elastomer (B) comprising a crosslinkable elastomer, wherein said softening agent (A) has a ratio of an amount of the paraffinic hydrocarbon CP and an amount of the naphthenic hydrocarbon CN, CP/CNN, which are specified by ASTM D2140-97, of not less than 0 and not more than 1.5, and an amount of the aromatic hydrocarbon CA of not less than 0% and not more than 5% based on an amount of hydrocarbons in the whole softening agent.Type: GrantFiled: August 20, 2002Date of Patent: January 25, 2005Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara
-
Publication number: 20050004313Abstract: A vulcanized rubbery polymer composition comprising a component (A) and a thermoplastic resin (B), wherein the component (A) comprises a hydrogenated copolymer (A-1), which is obtained by hydrogenating a copolymer comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of not less than 5% by weight and not more than 90% by weight, and which has a crystallization peak calorie measured by a differential scan calorimetry of not more than 2 J/g, and at least one vulcanizable rubber (A-2) selected from the group consisting of a copolymer (a1) comprising an ethylene unit and an ?-olefin unit of 3 to 20 carbon atoms and a hydrogenated rubber (a2) obtained from a homopolymer rubber of at least one conjugated diene monomer or a copolymer rubber comprising a conjugated diene monomer unit and an aromatic vinyl monomer unit and having an aromatic vinyl monomer content of less than 5% by weight.Type: ApplicationFiled: June 6, 2003Publication date: January 6, 2005Inventors: Hajime Nishihara, Takeshi Yasui
-
Patent number: 6800693Abstract: An olefin polymer composition, which comprises a cross-linked olefin polymer composition comprising at least one cross-linking rubber like polymer (A) and an olefin resin (B), the cross-linking rubber like polymer (A) being selected from the group consisting of (1) an ethylene-&agr;-olefin copolymer, which contains an ethylene unit and an &agr;-olefin unit having 3 to 20 carbon atoms, and which is produced using a metallocene catalyst, and (2) at least one hydrogenated rubber selected from the group consisting of a homopolymer of a conjugated diene monomer and a copolymer thereof, in which rubber not less than 50% of all olefinic double bonds are hydrogenated, wherein the cross-linking rubber like polymer (A) has a weight average particle diameter of from 0.01 to 3 &mgr;m.Type: GrantFiled: December 13, 2002Date of Patent: October 5, 2004Assignee: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Ikuji Ohtani
-
Patent number: 6790887Abstract: Disclosed is an aromatic polycarbonate resin composition comprising a resin component (A) selected from the group consisting of an aromatic polycarbonate and a resin mixture of an aromatic polycarbonate and at least one organic polymer resin other than an aromatic polycarbonate, wherein the resin mixture has an aromatic polycarbonate content of 50% by weight or more, and at least one aromatic group-containing silicone compound (B), wherein the at least one aromatic group-containing silicone compound (B) comprises a monomer, a polymer or a mixture thereof, which is represented by at least one formula selected from the group consisting of the following formulae (1) and (2): wherein the component (B) contains the aromatic group in an amount of 5 to 100 mole %, based on the total molar amount of R1, R2, R3 and R4, wherein each of R1 and R2 represents a hydrogen atom or a C1-C20 hydrocarbon group, and each of R3 and R4 represents a hydrogen atom, a C1-C20 hydrocarbon group or a metal-containing gType: GrantFiled: November 22, 2000Date of Patent: September 14, 2004Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara
-
Publication number: 20040176540Abstract: A vulcanized thermoplastic olefinic rubber composition comprising at least one vulcanizable rubber (A) selected from the group consisting of ethylene-&agr;-olefin copolymers, which contain an ethylene unit and a unit of an &agr;-olefin having 3 to 20 carbon atoms, and which are produced with use of a metallocene catalyst, and an olefinic resin (B), wherein X and Y as defined below of said (A) are from 1 to 40% and from 0.02 to 0.Type: ApplicationFiled: March 7, 2003Publication date: September 9, 2004Inventor: Hajime Nishihara
-
Publication number: 20040116605Abstract: An olefin polymer composition, which comprises a cross-linked olefin polymer composition comprising at least one cross-linking rubber like polymer (A) and an olefin resin (B), the cross-linking rubber like polymer (A) being selected from the group consisting of (1) an ethylene-&agr;-olefin copolymer, which contains an ethylene unit and an &agr;-olefin unit having 3 to 20 carbon atoms, and which is produced using a metallocene catalyst, and (2) at least one hydrogenated rubber selected from the group consisting of a homopolymer of a conjugated diene monomer and a copolymer thereof, in which rubber not less than 50% of all olefinic double bonds are hydrogenated, wherein the cross-linking rubber like polymer (A) has a weight average particle diameter of from 0.01 to 3 &mgr;m.Type: ApplicationFiled: December 13, 2002Publication date: June 17, 2004Inventors: Hajime Nishihara, Ikuji Ohtani
-
Publication number: 20040039108Abstract: An elastomer composition comprising a softening agent (A) comprising a naphthenic hydrocarbon and optionally at least one selected from the group consisting of an aromatic hydrocarbon and a paraffinic hydrocarbon, and an elastomer (B) comprising a crosslinkable elastomer, wherein said softening agent (A) has a ratio of an amount of the paraffinic hydrocarbon CP, and an amount of the naphthenic hydrocarbon CN, CP/CNN, which are specified by ASTM D2140-97, of not less than 0 and not more than 1.5, and an amount of the aromatic hydrocarbon CA of not less than 0% and not more than 5% based on an amount of hydrocarbons in the whole softening agent.Type: ApplicationFiled: August 20, 2002Publication date: February 26, 2004Inventor: Hajime Nishihara
-
Publication number: 20030181594Abstract: A thermoplastic crosslinked rubber composition comprising (A) from 1 to 99 parts by weight of a hydrogenated rubber obtained by hydrogenating not less than 50% of total double bonds of at least one homopolymer rubber of a conjugated diene type monomer or a random copolymer rubber consisting of a conjugated diene type monomer unit and an aromatic vinyl monomer unit and (B) from 1 to 99 parts by weight of an olefinic thermoplastic resin, total amount of (A) and (B) being 100 parts by weight, said (A) being partially or completely crosslinked, wherein said (A) is crystalline rubber, having a crystallization temperature in a range of from −50 to 70° C. and a heat quantity of crystallization at peak in a range of from 3 to 100 J/g in differential scanning calorimetry (DSC method).Type: ApplicationFiled: March 19, 2003Publication date: September 25, 2003Applicant: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Yoshikazu Suda, Ikuji Ohtani, Sigeru Sasaki
-
Publication number: 20030166757Abstract: Disclosed is a coated particulate flame retardant for a polymer, which comprises inorganic compound particles, each having, bonded to the surface thereof through a covalent bond, a coating compound so that the inorganic compound particle is coated with the coating compound, wherein the coated inorganic compound particles have an in situ-found number average particle diameter (&agr;) in the range of from 1 to 1,000 nm, as measured with respect to the coated inorganic compound particles in a composition comprising a polymer having dispersed therein the coated inorganic compound particles.Type: ApplicationFiled: February 10, 2003Publication date: September 4, 2003Inventors: Hajime Nishihara, Toshiharu Sakuma
-
Publication number: 20030083442Abstract: Disclosed is a shaped article obtained by (1) melting a flame retardant polycarbonate resin composition comprising a resin component (A) consisting of an aromatic polycarbonate or mainly comprising an aromatic polycarbonate, and a non-halogen flame retardant (B), and (2) molding the resultant molten resin composition, wherein the number of discrete particles, dispersed in said shaped article, each having a size of 50 &mgr;m or more, is 0 to 100/mm2 as measured with respect to the surface of a flat sample cut out from the shaped article.Type: ApplicationFiled: June 17, 2002Publication date: May 1, 2003Inventors: Hajime Nishihara, Hiroshi Yamaki
-
Patent number: 6555624Abstract: A thermoplastic crosslinked rubber composition comprising (A) from 1 to 99 parts by weight of a hydrogenated rubber obtained by hydrogenating not less than 50% of total double bonds of at least one homopolymer rubber of a conjugated diene type monomer or a random copolymer rubber consisting of a conjugated diene type monomer unit and an aromatic vinyl monomer unit and (B) from 1 to 99 parts by weight of an olefinic thermoplastic resin, total amount of (A) and (B) being 100 parts by weight, said (A) being partially or completely crosslinked, wherein said (A) is crystalline rubber, having a crystallization temperature in a range of from −50 to 70° C. and a heat quantity of crystallization at peak in a range of from 3 to 100 J/g in differential scanning calorimetry (DSC method).Type: GrantFiled: August 15, 2001Date of Patent: April 29, 2003Assignee: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Yoshikazu Suda, Ikuji Ohtani, Sigeru Sasaki
-
Patent number: 6506839Abstract: An elastomer composition obtained by crosslinking 1-99 parts by weight of a crosslinkable rubber-like polymer (A) and 1-99 parts by weight of a polypropylene resin (B) [the total amount of (A) and (B) being 100 parts by weight], where (B) is a crosslinking type polypropylene resin, has a flexural modulus of 100-10000 kgf/cm2 as specified in JIS K6758 and has a melting point peak in the range of 100-150° C. in differential scanning calorimetry (DSC), the melting point peak calorie being in the range of 10-600 J/g, especially the above elastomer composition wherein (A) has a crosslinking degree of 1-95% and a swelling degree of 3-100.Type: GrantFiled: October 13, 2000Date of Patent: January 14, 2003Assignee: Asahi Kasei Kabushiki KaishaInventors: Hajime Nishihara, Shinichi Shibayama
-
Patent number: 6454969Abstract: Disclosed is a silicon-containing flame retardant for an organic polymer, comprising a monomer, a polymer or a mixture thereof, which is represented by the following formula (1): wherein each of R1 and R2 independently represents a monovalent C1-C20 hydrocarbon group; each of R3 and R4 independently represents a monovalent or divalent C1-C20 hydrocarbon group, with the proviso that, when each of R3 and R4 independently represents a divalent C1-C20 hydrocarbon group, R3 and R4 are bonded to each other to form a ring; and n is 1 or more in terms of the number average n-value.Type: GrantFiled: August 4, 2000Date of Patent: September 24, 2002Assignee: Asahi Kasei Kabushiki KaishaInventor: Hajime Nishihara