Patents by Inventor Toru Iwashita
Toru Iwashita 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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Publication number: 20160237269Abstract: A long-fiber-reinforced resin composition including the following component (A) and the component (B), the content of the component (A) being 50 to 90 wt % and the content of the component (B) being 10 to 50 wt %; and the content of reinforcing fiber contained in the component (A) being 20 to 60 wt % relative to the total amount of the fiber-reinforced resin composition: [Component (A)] a long-fiber-reinforced thermoplastic resin pellet including a thermoplastic resin, a modified polyolefin-based resin modified with an unsaturated carboxylic acid or its derivative and reinforcing fiber and satisfying the following (A-1) to (A-4): (A-1): the melt index of the thermoplastic resin (resin temperature: 230° C., load: 21.18N) is 100 to 250 g/10 min; (A-2): the relaxation time ? of the thermoplastic resin at an angular frequency ?=1 (rad/sec) calculated from the storage modulus G? and the loss modulus G? measured by means of a cone-and-plate rheometer is 0.Type: ApplicationFiled: April 27, 2016Publication date: August 18, 2016Applicant: PRIME POLYMER CO., LTD.Inventors: Hirofumi GODA, Toru IWASHITA
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Patent number: 9359492Abstract: A long-fiber-reinforced resin composition including (A) a long-fiber-reinforced thermoplastic resin pellet including a thermoplastic resin, a modified polyolefin-based resin modified with an unsaturated carboxylic acid or its derivative and reinforcing fiber and satisfying (A-1) the melt index of the thermoplastic resin is 100-250 g/10 min, (A-2) the relaxation time ? of the thermoplastic resin is 0.1 (sec) or less, (A-3) the content of the reinforcing fiber is 40-70 wt %, and (A-4) the content of the modified polyolefin-based resin is 1-5 wt %; and (B) a polyolefin-based resin satisfying (B-1) the melt index of the polyolefin-based resin is 20-70 g/10 min, and (B-2) the relaxation time ? of the polyolefin-based resin is 0.23 (sec) or less; wherein the content of reinforcing fiber contained in (A) is 20-60 wt % relative to the total amount of the fiber-reinforced resin composition.Type: GrantFiled: March 19, 2009Date of Patent: June 7, 2016Assignee: PRIME POLYMER CO., LTD.Inventors: Hirofumi Goda, Toru Iwashita
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Patent number: 8877834Abstract: A carbon fiber-reinforced resin composition including (A) a polyolefin resin, (B) an acid-modified polyolefin resin and (C) modified carbon fibers of which the adhesion amount of an amino group-containing modified polylolefin resin is 0.2 to 5.0 mass %, wherein the mass ratio of (A):(B) is 0 to 99.5:100 to 0.5 and the mass ratio [(A)+(B)]:(C) is 40 to 97:60 to 3.Type: GrantFiled: September 8, 2010Date of Patent: November 4, 2014Assignee: Prime Polymer Co., Ltd.Inventors: Toru Iwashita, Toshiyuki Ishii, Rikuo Onishi
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Patent number: 8680194Abstract: A long-fiber-reinforced resin composition including (A) a long-fiber-reinforced thermoplastic resin pellet including a thermoplastic resin, a modified polyolefin-based resin modified with an unsaturated carboxylic acid or its derivative and reinforcing fiber and satisfying (A-1) the melt index of the thermoplastic resin is 100-250 g/10 min, (A-2) the relaxation time ? of the thermoplastic resin is 0.1 (sec) or less, (A-3) the content of the reinforcing fiber is 40-70 wt %, and (A-4) the content of the modified polyolefin-based resin is 1-5 wt %; and (B) a polyolefin-based resin satisfying (B-1) the melt index of the polyolefin-based resin is 20-70 g/10 min, and (B-2) the relaxation time ? of the polyolefin-based resin is 0.23 (sec) or less; wherein the content of reinforcing fiber contained in (A) is 20-60 wt % relative to the total amount of the fiber-reinforced resin composition.Type: GrantFiled: March 19, 2009Date of Patent: March 25, 2014Assignee: Prime Polymer Co., Ltd.Inventors: Hirofumi Goda, Toru Iwashita
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Publication number: 20140031459Abstract: It is an object of the present invention to provide a modified propylene resin containing very small amounts of low-crystalline and low-molecular-weight components. The present invention relates to a modified propylene resin characterized by satisfying the following requirements (1) to (4). (1) The melting point (Tm) measured with a differential scanning calorimeter (DSC) is 140° C. or higher. (2) The amount of grafts of ethylenic unsaturated bond-containing monomer after hot xylene washing is 0.1 to 5 percent by weight. (3) The amount of components soluble in o-dichlorobenzene at 70° C. is 1.5 percent by weight or less. (4) The intrinsic viscosity [?] is 0.1 to 4 dl/g.Type: ApplicationFiled: September 26, 2013Publication date: January 30, 2014Applicants: Prime Polymer Co., Ltd., Mitsui Chemicals, Inc.Inventors: Keita ITAKURA, Toru IWASHITA, Satoshi HASHIZUME, Rikuo OHNISHI, Hirofumi GODA
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Patent number: 8420728Abstract: Long-fiber-reinforced thermoplastic resin particles and a blend thereof are provided, wherein the opening property of the reinforcing fibers during molding is good, and a molded body exhibiting an excellent appearance and having high mechanical strength is obtained. The particles (A) contain a thermoplastic resin (A1), produced by using a metallocene catalyst, a modified polyolefin resin (A2) modified with an unsaturated carboxylic acid or a derivative thereof, and reinforcing fibers (A3) and satisfying additional requirements described herein.Type: GrantFiled: September 6, 2012Date of Patent: April 16, 2013Assignees: Mitsui Chemicals, Inc., Prime Polymer Co., Ltd.Inventors: Hirofumi Goda, Toru Iwashita, Keita Itakura
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Publication number: 20130059966Abstract: Long-fiber-reinforced thermoplastic resin particles and a blend thereof are provided, wherein the opening property of the reinforcing fibers during molding is good, and a molded body exhibiting an excellent appearance and having high mechanical strength is obtained. The particles (A) contain a thermoplastic resin (A1), produced by using a metallocene catalyst, a modified polyolefin resin (A2) modified with an unsaturated carboxylic acid or a derivative thereof, and reinforcing fibers (A3) and satisfying additional requirements described herein.Type: ApplicationFiled: September 6, 2012Publication date: March 7, 2013Inventors: Hirofumi Goda, Toru Iwashita, Keita Itakura
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Publication number: 20120238688Abstract: A carbon fiber-reinforced resin composition including (A) a polyolefin resin, (B) an acid-modified polyolefin resin and (C) modified carbon fibers of which the adhesion amount of an amino group-containing modified polylolefin resin is 0.2 to 5.0 mass %, wherein the mass ratio of (A):(B) is 0 to 99.5:100 to 0.5 and the mass ratio [(A)+(B)]:(C) is 40 to 97:60 to 3.Type: ApplicationFiled: September 8, 2010Publication date: September 20, 2012Applicant: PRIME POLYMER CO., LTD.Inventors: Toru Iwashita, Toshiyuki Ishii, Rikuo Onishi
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Publication number: 20120208019Abstract: The present invention relates to a carbon fiber bundle to which an amino group-containing modified polyolefin resin has applied, wherein the amount of applying amino group-containing modified polyolefin resin is 0.2 to 5.0% by mass. This carbon fiber bundle can be produced by applying 0.2 to 5.0% by mass of the amino group-containing modified polyolefin resin to the surface of the carbon fiber bundle. The present invention can exhibit excellent interface adhesion to a polyolefin resin, particularly to a polypropylene resin, and can provide a carbon fiber bundle useful for reinforcing the polyolefin resin and a method of producing the same.Type: ApplicationFiled: September 8, 2010Publication date: August 16, 2012Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Naoki Sugiura, Toru Iwashita, Toshiyuki Ishii, Rikuo Onishi
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Publication number: 20110178229Abstract: Long-fiber-reinforced thermoplastic resin particles and a blend thereof are provided, wherein the opening property of the reinforcing fibers during molding is good, and a molded body exhibiting an excellent appearance and having high mechanical strength is obtained. The particles (A) contains a thermoplastic resin (A1), produced by using a metallocene catalyst, a modified polyolefin resin (A2) modified with an unsaturated carboxylic acid or a derivative thereof, and reinforcing fibers (A3) and satisfy the following requirements (1) to (5); (1) the amount of modification of the unsaturated carboxylic acid or a derivative thereof is 0.Type: ApplicationFiled: September 28, 2009Publication date: July 21, 2011Inventors: Hirofumi Goda, Toru Iwashita, Keita Itakura
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Publication number: 20110040022Abstract: A long-fiber-reinforced resin composition including the following component (A) and the component (B), the content of the component (A) being 50 to 90 wt % and the content of the component (B) being 10 to 50 wt %; and the content of reinforcing fiber contained in the component (A) being 20 to 60 wt % relative to the total amount of the fiber-reinforced resin composition: [Component (A)] a long-fiber-reinforced thermoplastic resin pellet including a thermoplastic resin, a modified polyolefin-based resin modified with an unsaturated carboxylic acid or its derivative and reinforcing fiber and satisfying the following (A-1) to (A-4): (A-1): the melt index of the thermoplastic resin (resin temperature: 230° C., load: 21.18N) is 100 to 250 g/10 min; (A-2): the relaxation time ? of the thermoplastic resin at an angular frequency ?=1 (rad/sec) calculated from the storage modulus G? and the loss modulus G? measured by means of a cone-and-plate rheometer is 0.Type: ApplicationFiled: March 19, 2009Publication date: February 17, 2011Applicant: PRIME POLYMER CO., LTD.Inventors: Hirofumi Goda, Toru Iwashita
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Publication number: 20100280153Abstract: It is an object of the present invention to provide a modified propylene resin containing very small amounts of low-crystalline and low-molecular-weight components. The present invention relates to a modified propylene resin characterized by satisfying the following requirements (1) to (4). (1) The melting point (Tm) measured with a differential scanning calorimeter (DSC) is 140° C. or higher. (2) The amount of grafts of ethylenic unsaturated bond-containing monomer after hot xylene washing is 0.1 to 5 percent by weight. (3) The amount of components soluble in o-dichlorobenzene at 70° C. is 1.5 percent by weight or less. (4) The intrinsic viscosity [?] is 0.1 to 4 dl/g.Type: ApplicationFiled: January 8, 2009Publication date: November 4, 2010Inventors: Keita Itakura, Toru Iwashita, Satoshi Hashizume, Rikuo Ohnishi, Hirofuni Goda
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Patent number: 4283518Abstract: The present invention relates to a process for manufacturing a petroleum resin wherein a fraction (component A) containing an aromatic hydrocarbon obtained by cracking of petroleum and a thermally polymerized oil (component B) obtained by previously thermal-polymerizing the component A are mixed and then the mixture of the components A and B is subjected to polymerization by employing a Friedel-Crafts catalyst. It is also directed to propose a petroleum resin of a superior quality having a softening point optionally in a range of 30.degree.-120.degree. C. and various bromine value in such a manner that a mixing ratio of the components A and B is properly adjusted.Type: GrantFiled: December 13, 1979Date of Patent: August 11, 1981Assignee: Toyo Soda Manufacturing Co., Ltd.Inventors: Toru Iwashita, Mineo Nagano, Koji Tanaka