Patents by Inventor Ikunori Sakai
Ikunori Sakai 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: 8686088Abstract: Polypropylene resin compositions are suited for injection molding and are capable of giving molded articles having excellent mechanical properties, reduced tendency to cause flow marks or weld marks, low gloss, and superior scratch resistance. A polypropylene resin composition includes: an amount of a resin composition (F) including a polypropylene (A), an ethylene-?-olef in copolymer or an ethylene-?-olefin-diene copolymer (B-I) having MFR of less than 0.4 g/10 min, an ethylene-?-olefin copolymer (B-2) having MFR of 0.5 to less than 20 g/10 min, and an inorganic filler (C); and specific amounts relative to the resin composition (F) of a modified polypropylene (D) and a surface modifier (E).Type: GrantFiled: September 24, 2008Date of Patent: April 1, 2014Assignee: Prime Polymer Co., Ltd.Inventors: Yoshio Sugimoto, Hiroshi Suenari, Ikunori Sakai, Frank E. Jones, Toru Fukada
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Patent number: 8318863Abstract: Foaming polypropylene resin compositions are excellent in balance between melt tension and flowability, can give injection-molded foams having superior mechanical strength such as impact resistance, and are suited for the production of automobile parts or the like. Processes of the invention produce injection-molded foams from the compositions. A foaming polypropylene resin composition according to the present invention includes a polypropylene resin (A) and an ethylene/?-olefin having 3-10 carbon atoms copolymer (B) in a specific ratio; the ethylene/?-olefin having 3-10-carbon atoms copolymer (B) includes a higher molecular weight component (B-H) having MFR190 of 1 to 10 g/10 min and a lower molecular weight component (B-L) having MFR190 of 20 to 50 g/10 min; and the weight ratio between (B-H) and (B-L), (B-H):(B-L), is in the range of 6:4 to 2:8.Type: GrantFiled: September 19, 2008Date of Patent: November 27, 2012Assignee: Prime Polymer Co., Ltd.Inventors: Tatsuji Kawamura, Yukio Ishii, Ikunori Sakai
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Publication number: 20100311894Abstract: A polypropylene resin composition includes: 14 to 39 wt % of a propylene block copolymer (A-1) having MFR of 1 to 200 g/10 min, the propylene block copolymer comprising 70 to 95 wt % of a room temperature n-decane insoluble part (Dinsol (1)) and 5 to 30 wt % of a room temperature n-decane soluble part (Dsol (1)), the Dinsol (1) having a mmmm fraction of not less than 97%, the Dsol (1) having [?] of 4 to 10 dl/g; 20 to 60 wt % of a propylene block copolymer (A-2) having MFR of 1 to 200 g/10 min, the propylene block copolymer comprising 70 to 95 wt % of a room temperature n-decane insoluble part (Dinsol (2)) and 5 to 30 wt % of a room temperature n-decane soluble part (Dsol (2)), the Dinsol (2) having a mmmm fraction of not less than 97%, the Dsol (2) having [?] of 1.5 to 4 dl/g; 5 to 30 wt % of an ethylene/?-olefin copolymer rubber (B); and 10 to 30 wt % of an inorganic filler (C).Type: ApplicationFiled: October 27, 2008Publication date: December 9, 2010Inventors: Yoshiaki Tsukahara, Ikunori Sakai, Yoshio Sugimoto, Satoko Toei, Noriaki Fujiyama
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Patent number: 7619030Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C) in specified proportions. The polypropylene homopolymer (A1) exhibits an MFR (230° C.) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.05% or less, and an Mw/Mn, determined by GPC, of 1 to 3.Type: GrantFiled: April 26, 2006Date of Patent: November 17, 2009Assignee: Mitsui Chemicals, Inc.Inventors: Koji Kawai, Masahiro Yamashita, Yasushi Tohi, Keita Itakura, Ikunori Sakai, Mikio Hashimoto, Takeshi Minoda, Masamichi Naito, Toru Takaoka, Nobuo Kawahara, Hiromu Kaneyoshi
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Patent number: 7553887Abstract: To provide a resin composition comprising a polypropylene resin composition and an aluminum flake pigment for use as an automotive resin composition, which is excellent in mechanical strength, physical properties and flowability, and enables to produce molded products showing good metallic appearance. A composition comprising a crystalline propylene/ethylene block copolymer, an elastomeric polymer and an inorganic filler is a preferred example of the polypropylene resin composition, and aluminum flakes surface-coated with a polymer containing as constituent units acrylic acid, an acrylic acid ester, epoxylated polybutadiene and divinylbenzene are preferred examples of the aluminum flake pigment.Type: GrantFiled: August 22, 2003Date of Patent: June 30, 2009Assignee: Prime Polymer Co., Ltd.Inventors: Yoshio Sugimoto, Ikunori Sakai, Yusuke Umetani, Naoki Shoji, Keita Nagano, Takao Mizoshita, Isamu Yamaguchi
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Patent number: 7446147Abstract: A propylene resin composition comprising (A) a crystalline propylene block copolymer in an amount of 89 to 30% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]a as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (B) a crystalline propylene block copolymer in an amount of 5 to 25% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]b as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (C) an elastomeric polymer in an amount of 1 to 20% by weight, which has a melt flow rate (MFR, 230C, load of 2160 g) of 0.Type: GrantFiled: November 11, 2003Date of Patent: November 4, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Masamichi Naito, Ikunori Sakai, Yoshio Sugimoto, Kenta Tsubohara
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Patent number: 7166677Abstract: A polypropylene resin composition comprises (A) (a-1) a specific crystalline propylene/ethylene block copolymer or (a-3) a polymer mixture comprising the (a-1) and (a-2) a specific crystalline propylene-homopolymer in specific ratio, in an amount of 5 to 56% by weight, (B) a hydroxyl group-containing polypropylene having an intrinsic viscosity [?] of 0.8 to 2.0 dl/g and a melting point of 150 to 168° C., in an amount of 10 to 45% by weight, (C) a copolymer rubber of ethylene and an ?-olefin having a melt flow rate (ASTM D-1238, 230° C., load of 2160 g) of 0.Type: GrantFiled: March 17, 2005Date of Patent: January 23, 2007Assignees: Mitsui Chemicals, Inc., Toyota Jidosha Kabushiki Kaisha, Sumitomo Chemical Company, LimitedInventors: Kazuhiro Doi, Ikunori Sakai, Takayuki Nagai, Takeshi Sekito, Susumu Kanzaki, Mitsuji Tsuji
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Publication number: 20070010622Abstract: A propylene resin composition comprising (A) a crystalline propylene block copolymer in an amount of 89 to 30% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]a as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (B) a crystalline propylene block copolymer in an amount of 5 to 25% by weight, which has a specific content of a 23° C. n-decane-soluble component, said soluble component having a specific intrinsic viscosity [?]b as measured in decalin at 135° C., has a specific melt flow rate (MFR, 230° C., load of 2160 g), and has a specific isotactic pentad fraction of a polypropylene homopolymer portion as measured by 13C-NMR, (C) an elastomeric polymer in an amount of 1 to 20% by weight, which has a melt flow rate (MFR, 230C, load of 2160 g) of 0.Type: ApplicationFiled: November 11, 2003Publication date: January 11, 2007Inventors: Masamichi Naito, Ikunori Sakai, Yoshio Sugimoto, Kenta Tsubohara
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Publication number: 20060194914Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C) in specified proportions. The polypropylene homopolymer (A1) exhibits an MFR (230° C.) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.05% or less, and an Mw/Mn, determined by GPC, of 1 to 3.Type: ApplicationFiled: April 26, 2006Publication date: August 31, 2006Applicant: MITSUI CHEMICALS, INC.Inventors: Koji Kawai, Masahiro Yamashita, Yasushi Tohi, Keita Itakura, Ikunori Sakai, Mikio Hashimoto, Takeshi Minoda, Masamichi Naito, Toru Takaoka, Nobuo Kawahara, Hiromu Kaneyoshi
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Patent number: 7081493Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C), or comprising a propylene block copolymer (A2) and an inorganic filler (C) optionally together with an elastomer (B), in specified proportions. The propylene homopolymer (A1), or the propylene homopolymer segment of the propylene block copolymer (A2) exhibits an MFR (230-C) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.2% or less, and an Mw/Mn, determined by GPC, of 1 to 3.Type: GrantFiled: March 8, 2002Date of Patent: July 25, 2006Assignee: Mitsui Chemicals, Inc.Inventors: Koji Kawai, Masahiro Yamashita, Yasushi Tohi, Keita Itakura, Ikunori Sakai, Mikio Hashimoto, Takeshi Minoda, Masamichi Naito, Toru Takaoka, Nobuo Kawahara, Hiromu Kaneyoshi
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Publication number: 20050250892Abstract: To provide a resin composition comprising a polypropylene resin composition and an aluminum flake pigment for use as an automotive resin composition, which is excellent in mechanical strength, physical properties and flowability, and enables to produce molded products showing good metallic appearance. A composition comprising a crystalline propylene/ethylene block copolymer, an elastomeric polymer and an inorganic filler is a preferred example of the polypropylene resin composition, and aluminum flakes surface-coated with a polymer containing as constituent units acrylic acid, an acrylic acid ester, epoxylated polybutadiene and divinylbenzene are preferred examples of the aluminum flake pigment.Type: ApplicationFiled: August 22, 2003Publication date: November 10, 2005Inventors: Yoshio Sugimoto, Ikunori Sakai, Yusuke Umetani, Naoki Shoji, Keita Nagano, Takao Mizoshita, Isamu Yamaguchi
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Publication number: 20050209387Abstract: A polypropylene resin composition comprises (A) (a-1) a specific crystalline propylene/ethylene block copolymer or (a-3) a polymer mixture comprising the (a-1) and (a-2) a specific crystalline propylene-homopolymer in specific ratio, in an amount of 5 to 56% by weight, (B) a hydroxyl group-containing polypropylene having an intrinsic viscosity [?] of 0.8 to 2.0 dl/g and a melting point of 150 to 168° C., in an amount of 10 to 45% by weight, (C) a copolymer rubber of ethylene and an ?-olefin having a melt flow rate (ASTM D-1238, 230° C., load of 2160 g) of 0.Type: ApplicationFiled: March 17, 2005Publication date: September 22, 2005Applicants: MITSUI CHEMICALS, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA, Sumitomo Chemical Company, LimitedInventors: Kazuhiro Doi, Ikunori Sakai, Takayuki Nagai, Takeshi Sekito, Susumu Kanzaki, Mitsuji Tsuji
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Patent number: 6759475Abstract: The present invention provides a resin composition based on crystalline polypropylene which includes: (a) 3-65% by weight of a component soluble in paraxylene of 23° C., (b) 35-97% by weight of a component soluble in paraxylene of 135° C. and insoluble in paraxylene of 23° C., and (c) 0-30% by weight of a compoent insoluble in paraxylene of 135° C. The component (a) soluble in paraxylene of 23° C. is composed substantially of an elastomeric constituent (a1) having a content of styrene or its derivative in the range of 0-35% by weight and an intrinsic viscosity (n) in the range of 0.1-5 dl/g, the component (b) soluble is paraxylene of 135° C. and insoluble in paraxylene of 23° C.Type: GrantFiled: June 18, 2001Date of Patent: July 6, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Ikunori Sakai, Tohru Takaoka, Satoru Moriya, Mikio Hashimoto, Hideki Nakagawa, Hiroshi Yoshikawa
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Patent number: 6756430Abstract: A flame-retarding thermoplastic resin composition which is composed essentially of (A) a component of thermoplastic resin, (B) a component of nitrogen atom-containing phosphatic compound, (C) a component of hydroxyl group-containing compound or partly esterified product thereof and (D) a component of neutralizer for acids, with optional component (E) of triazine derivative or (F) of metal alkoxide, wherein the proportion of each component is such that the component (A) is in the range from 60 to 90 parts by weight, the sum of the components (B)+(C) is in the range from 10 to 40 parts by weight and the component (D) is in the range from 0.1 to 5 parts by weight, per 100 parts by weight of the total sum of (A)+(B)+(C), respectively, wherein the weight ratio of (B)/(C) amounts to at least 1.Type: GrantFiled: June 12, 2001Date of Patent: June 29, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Yuichi Matsuda, Mikio Hashimoto, Ikunori Sakai
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Publication number: 20030187121Abstract: An automobile part comprising a polypropylene resin composition, the polypropylene resin composition comprising a propylene homopolymer (A1), an elastomer (B) and an inorganic filler (C), or comprising a propylene block copolymer (A2) and an inorganic filler (C) optionally together with an elastomer (B), in specified proportions. The propylene homopolymer (A1), or the propylene homopolymer segment of the propylene block copolymer (A2) exhibits an MFR (230° C.) of 20 to 300 g/10 min, a ratio of position irregular units derived from 2,1-insertion or 1,3-insertion of propylene monomer relative to all propylene structural units, determined from a 13C-NMR spectrum, each of 0.2% or less, and an Mw/Mn, determined by GPC, of 1 to 3.Type: ApplicationFiled: November 12, 2002Publication date: October 2, 2003Inventors: Koji Kawai, Masahiro Yamashita, Yasushi Tohi, Keita Itakura, Ikunori Sakai, Mikio Hashimoto, Takeshi Minoda, Masamichi Naito, Toru Takaoka, Nobuo Kawahara, Hiromu Kayenoshi
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Publication number: 20020058741Abstract: Present invention provides a resin composition bases on crystalline polypropylene which does not suffer from occurrence of flow mark and rashes caused from polymer gel upon molding and, thus, can produce molded articles exhibiting superior appearance and having excellent mechanical strength, such as flexural modulus and so on, together with better flowability upon the molding and which can be obtained at a lower cost by choosing starting materials of high productivity.Type: ApplicationFiled: June 18, 2001Publication date: May 16, 2002Inventors: Ikunori Sakai, Tohru Takaoka, Satoru Moriya, Mikio Hashimoto, Hideki Nakagawa, Hiroshi Yoshikawa
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Patent number: 6350828Abstract: A polypropylene resin composition exibiting a high melt tension and superior moldability, which can be molded efficiently by a high-speed molding into scarcely deformable larger molded articles of better appearance with high stiffness and which comprises polypropylene as a main component and has the following characteristic features 1) to 4), namely, 1) that a melt flow rate (MFR, determined at 230° C. under a load of 2.16 kg) is in the range of 0.01 to 5 g/10 min., 2) that a content of a high molecular weight polypropylene exhibiting an intrinsic viscosity [&eegr;], determined at 135° C. in decalin, of 8-13 dl/g is in the range of 15 to 50% by weight, 3) that a gel areal density in number is 3,000/450 cm2 or less and 4) that a molecular weight distribution determined by gel permeation chromatography (GPC) is 6-20, as expressed by Mw/Mn, and is 3.5 or higher, as expressed by Mz/Mw.Type: GrantFiled: March 31, 1999Date of Patent: February 26, 2002Assignee: Grand Polymer Co LtdInventors: Tohru Takaoka, Ikunori Sakai, Hideki Nakagawa, Mikio Hashimoto, Satoshi Matsuura, Takashi Shimizu
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Publication number: 20020013392Abstract: A flame-retarding thermoplastic resin composition which is composed essentially ofType: ApplicationFiled: June 12, 2001Publication date: January 31, 2002Applicant: GRAND POLYMER CO., LTD.Inventors: Yuichi Matsuda, Mikio Hashimoto, Ikunori Sakai
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Patent number: 6214934Abstract: A polypropylene resin composition for use in automotive inner and outer trims, comprising 50 to 85% by weight of a crystalline polypropylene (A) having an MFR (230° C.) of 7 to 70 g/10 min, 2 to 16% by weight of a hydrogenated block copolymer (B) obtained by hydrogenating at a hydrogenation ratio of at least 90% an aromatic vinyl/conjugated diene block copolymer which contains an aromatic vinyl block polymer unit in an amount of 22% by weight or less and has an MFR (230° C.) of at least 5 g/10 min, and 5 to 25% by weight of an inorganic filler (G) having an average particle size of 0.1 to 3 &mgr;m as essential components. This composition may contain, as optional components, another hydrogenated block copolymer (C), an aromatic hydrocarbon copolymer (D), a crystalline polyethylene (E) and a soft ethylene/&agr;-olefin copolymer (F). This composition is excellent in heat resistance, rigidity and impact resistance and can provide a molding having beautiful appearance.Type: GrantFiled: May 27, 1998Date of Patent: April 10, 2001Assignees: Mitsui Chemicals Inc, Grand Polymer Co. Ltd, Toyota Jidosha Kabushiki KaishaInventors: Satoru Moriya, Akira Todo, Ikunori Sakai, Takao Nomura, Takeyoshi Nishio
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Patent number: 6121363Abstract: A crystalline propyleiie block-copolymer composition exhibiting superior flowability upon molding for use in automobile parts, which composition comprises 41 to 71% by weight of a crystalline propylene block-copolymer composed of a propylene homopolymer portion (Fp) and an ethylene/propylene random copolymer portion (Fc) and having an ethylene content of 1 to 10% by weight and a melt flow rate (MFR) of 20 to 100 g/10 min.; 12 to 22% by weight of a first hydrogenated product of a block-copolymer having a relatively smaller stylene content; 2 to 12% by weight of a second hydrogenated product of a block-copolymer having a relatively greater stylene content; and 15 to 25% by weight of talc, wherein the propylene homopolymer portion (Fp) contains 20 to 50% by weight of a low molecular weight propylene homopolymer having an MFR of 400 to 1,000 g/10 min., the average MFR being 100 to 350 g/10 min.Type: GrantFiled: February 17, 1999Date of Patent: September 19, 2000Assignees: Grand Polymer Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Ikunori Sakai, Mikio Hashimoto, Takayuki Nagai, Takao Nomura, Masatoshi Matsuda, Osamu Kito, Hisayuki Iwai