Patents by Inventor Noboru Yamaoka
Noboru Yamaoka 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: 5268220Abstract: The present invention provides a polypropylene film having high transparency and heat-sealability and superior in the balance between stiffness (tensile modulus) and impact resistance which polypropylene film comprises a) 80-99.5% by weight of a propylene polymer and b) 0.5-20% by weight of an ethylene/.alpha.-olefin copolymer prepared by the copolymerization of ethylene and an .alpha.-olefin having a 3 to 12 carbon atoms, said ethylene/.alpha.-olefin copolymer satisfying the following conditions (i) to (iii):(i) a density of 0.860 to 0.910 g/cm.sup.3 ;(ii) a maximum peak temperature of not lower than 100.degree. C. as measured by differential scanning calorimetry (DSC); and(iii) an insolubles content in boiling n-hexane of not lower than 10% by weight.Type: GrantFiled: March 3, 1992Date of Patent: December 7, 1993Assignee: Nippon Petrochemicals Company, LimitedInventors: Minoru Tajima, Koichi Fujii, Noboru Yamaoka
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Patent number: 4822855Abstract: A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B) and (C):(A) 30-70 parts by weight of an ethylene/.alpha.-olefin copolymer prepared by copolymerizing ethylene and an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/.alpha.-olefin copolymer having the following properties (I) to (IV):______________________________________ (I) Melt index 0.01-100 g/10 min (II) Density 0.860-0.910 g/cm.sup.3 (III) Maximum peak not lower than 100.degree. C. temperature as measured according to a differential scanning calorimetry (DSC) (IV) Insolubles in boiling not less than 10 wt. % n-hexane ______________________________________(B) 70-30 parts by weight of a propylene polymer; and(C) 70-200 parts by weight, based on 100 parts by weight of the components (A) and (B), of an ethylene/.Type: GrantFiled: August 4, 1987Date of Patent: April 18, 1989Assignee: Nippon Oil Company, LimitedInventors: Seizo Kobayashi, Katumi Usui, Takashi Mizoe, Noboru Yamaoka, Kazuo Matsuura
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Patent number: 4775722Abstract: A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B), (C) and (D):(A) 10-40% by weight of an ethylene/.alpha.-olefin copolymer prepared by copolymerizing ethylene and an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/.alpha.-olefin copolymer having the following properties (I) to (IV):(I) Melt index: 0.01-50 g/10 min(II) Density: 0.860-0.910 g/cm.sup.3(III) Maximum peak temperature as measured according to a differential scanning calorimetry (DSC): not lower than 100.degree. C.(IV) Insolubles in boiling n-hexane: not less than 10 wt. %(B) 15-35% by weight of a propylene polymer;(C) 10-40% by weight of an ethylene/.alpha.Type: GrantFiled: September 1, 1987Date of Patent: October 4, 1988Assignee: Nippon Oil Company, LimitedInventors: Seizo Kobayashi, Katumi Usui, Takashi Mizoe, Noboru Yamaoka, Kazuo Matsuura
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Patent number: 4742106Abstract: A polyolefin composition having a high rigidity and a high impact resistance, said polyolefin composition comprising:(a) 10-96% by weight of a propylene polymer;(b) 2-30% by weight of an ethylene/.alpha.-olefin copolymer obtained by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst consisting essentially of a solid material and an organoaluminum compound, said solid material containing magnesium and titanium and/or vanadium, and said ethylene/.alpha.-olefin copolymer having the following properties (i)-(iv):______________________________________ (i) Melt index 0.01-100 g/10 min (ii) Density 0.860-0.910 g/cm.sup.3 (iii) Maximum peak temperature not lower than as measured according to 100.degree. C. a differential scanning calorimetry (DSC) (iv) Insolubles in boiling not less than 10 n-hexane wt. % ______________________________________(c) 20-60% by weight of a mica,provided the toal amount of said components (a), (b) and (c) is 100% by weight.Type: GrantFiled: February 2, 1987Date of Patent: May 3, 1988Assignee: Nippon Petrochemicals Company, LimitedInventors: Takeshi Kamiya, Noboru Yamaoka
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Patent number: 4732940Abstract: A crosslinked resin composition obtained by crosslinking a composition comprising (A) 95-10 wt. % of a propylene polymer and (B) 5-90 wt. % of an ethylene/.alpha.-olefin copolymer having the following properties (I) to (iv) and prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst, said catalyst comprising a solid component and an organoaluminum compound, said solid component containing at least magnesium and titanium:______________________________________ (i) Melt index 0.01-100 g/10 min (ii) Density 0.860-0.910 g/cm.sup.3 (iii) Maximum peak temperature not lower than 100.degree. C. measured according to a differential scanning calorimetry (DSC) (iv) Insolubles in boiling not less than 10 wt.Type: GrantFiled: December 13, 1985Date of Patent: March 22, 1988Assignee: Nippon Oil Company, LimitedInventors: Noboru Yamaoka, Kiyoyasu Tanabe, Katumi Usui, Takashi Mizoe, Kazuo Matsuura
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Patent number: 4722973Abstract: This invention provides a thermoplastic elastomer composition obtained by blending (A) a hard segment comprising a low-density ethylene-.alpha.-olefin copolymer formed by copolymerizing ethylene with an .alpha.-olefin by the use of a specific catalyst and characterized by specifically defined properties and (B) a soft segment comprising an ethylene-.alpha.-olefin copolymer rubber, or obtained by partial cross-linking of the resulting blend.This elastomer composition has characteristic features such as high flexibility, good fluidity, excellent tensile properties, good thermal resistance and oil resistance and low permanent strain.Type: GrantFiled: April 2, 1986Date of Patent: February 2, 1988Assignee: Nippon Oil Co., Ltd.Inventors: Noboru Yamaoka, Kiyoyasu Tanabe, Katumi Usui, Takashi Mizoe, Kazuo Matsuura
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Patent number: 4704439Abstract: Chlorinated linear ultra low density polyethylene containing 3-40% by weight of chlorine produced by chlorinating a linear ultra low density polyethylene having the properties (i)-(iv) cited below, said polyethylene being produced by copolymerizing ethylene and an .alpha.-olefin having 3-12 carbon atoms in the presence of a catalyst comprising a solid catalyst component containing at least magnesium and titanium and an organic aluminum compound.______________________________________ (i) Melt index 0.01-100 g/10 min (ii) Density 0.860-0.910 g/cm.sup.3 (iii) Maximum peak temperature not lower than 100.degree. C.Type: GrantFiled: March 11, 1986Date of Patent: November 3, 1987Assignees: Nippon Oil Company, Limited, Osaka Soda Company, LimitedInventors: Noboru Yamaoka, Shigeki Yokoyama, Kazuo Matsuura, Kozo Misumi, Junichi Watanabe, Seiji Kadomatsu
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Patent number: 4587039Abstract: Provided is an electrically-conductive resin composition comprising an ethylene/.alpha.-olefin copolymer and carbon black, said ethylene/.alpha.-olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium:(i) Melt index: 0.01-100 g/10 min(ii) Density: 0.860-0.930 g/cm.sup.3(iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100.degree. C.(iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.Type: GrantFiled: August 6, 1984Date of Patent: May 6, 1986Assignee: Nippon Oil Company, LimitedInventors: Noboru Yamaoka, Seiju Kezuka, Moriya Iida, Mituji Miyoshi, Kazuo Matsuura
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Patent number: 4495334Abstract: Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.870 to 0.940 prepared by blending 30 to 80 parts by weight of an ethylene/.alpha.-olefin copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 1.7 to 10 dl/g and a density not higher than 0.945 which copolymer is obtained by copolymerizing ethylene with an .alpha.-olefin of C.sub.3 to C.sub.12, with 70 to 20 parts by weight of a high-pressure process polyethylene having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 1.3 dl/g and a density of 0.915 to 0.935.Type: GrantFiled: January 4, 1983Date of Patent: January 22, 1985Assignee: Nippon Oil Company Ltd.Inventors: Kazuo Matsuura, Noboru Yamaoka, Shinichi Yanahashi, Katumi Usui, Mituji Miyoshi
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Patent number: 4413097Abstract: Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.870 to 0.940 prepared by blending 30 to 80 parts by weight of an ethylene/propylene copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 1.7 to 10 dl/g and a density not higher than 0.945 which copolymer is obtained by copolymerizing ethylene with propylene, with 70 to 20 parts by weight of a high-pressure process polyethylene having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 0.7 dl/g and a density of 0.915 to 0.935.Type: GrantFiled: April 20, 1982Date of Patent: November 1, 1983Assignee: Nippon Oil Company, Ltd.Inventors: Kazuo Matsuura, Noboru Yamaoka, Shinichi Yanahashi, Katumi Usui, Mituji Miyoshi
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Patent number: 4412042Abstract: The present invention provides an improved process for preparing a polyolefin cross-linked by silane linkage by contacting a polyolefin modified with silane with water in the presence of a silanol condensation catalyst, the improvement comprising said polyolefin modified with silane being a reaction product produced by reacting an ethylene/.alpha.-olefin copolymer having a density of from 0.850 to 0.910 with a silane compound in the presence of a free radical generating agent, said ethylene/.alpha.-olefin copolymer being prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in a vapor phase with substantially no solvent present and in the presence of a catalyst comprising an organoaluminum compound and a solid substance containing magnesium, and a metal selected from the group consisting of titanium, vanadium and mixture thereof.Type: GrantFiled: March 8, 1982Date of Patent: October 25, 1983Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Noboru Yamaoka, Mituji Miyoshi
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Patent number: 4335224Abstract: Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.880 to 0.940 prepared by blending 10 to 80 parts by weight of an ethylene/.alpha.-olefin copolymer having an intrinsic viscosity determined in decalin at 135.degree. C. of 2.0 to 10 dl/g and a density of less than 0.91 which copolymer is obtained by copolymerizing ethylene with an .alpha.-olefin of C.sub.3 to C.sub.12 in vapor phase condition, with 20 to 90 parts by weight of an ethylene polymer having an intrinsic viscosity determined in decalin at 135.degree. C. of not higher than 1.7 dl/g and a density not less than 0.950.Type: GrantFiled: March 2, 1981Date of Patent: June 15, 1982Assignee: Nippon Oil Company, LimitedInventors: Kazuo Matsuura, Noboru Yamaoka, Sinichi Yanahashi, Katumi Usui, Mituji Miyoshi
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Patent number: 4330639Abstract: Provided is a polymer composition for forming polyethylene film comprising an ethylene/C.sub.3 -C.sub.8 .alpha.-olefin copolymer having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135.degree. C. and a density of 0.850 to 0.930 and an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density not lower than 0.940.Type: GrantFiled: December 22, 1980Date of Patent: May 18, 1982Assignee: Nippon Oil Company, Ltd.Inventors: Kazuo Matsuura, Noboru Yamaoka, Shinichi Yanahashi, Mituji Miyoshi