Patents by Inventor Nobuhiro Takizawa
Nobuhiro Takizawa 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: 10696816Abstract: The present invention addresses the problem of providing a polyester resin composition for reflective materials which gives a reflective material having a high reflectance. The polyester resin composition for reflective materials comprises: a polyester resin (A) comprising an alicyclic dicarboxylic acid ingredient unit (a1) and an aliphatic diol ingredient unit (b1); and a white pigment (B). The amount of the alicyclic dicarboxylic acid ingredient unit (a1) is 50 mol % or more of the amount of all the dicarboxylic acid ingredient units (a) in the polyester resin (A), and the amount of the aliphatic diol ingredient unit (b1) is 50 mol % or more of the amount of all the diol ingredient units (b) in the polyester resin (A). The alicyclic dicarboxylic acid ingredient unit (a1) comprises the cis and trans forms of cis-trans isomers, the proportion of the cis form determined by NMR being 20 mol % or higher.Type: GrantFiled: March 26, 2015Date of Patent: June 30, 2020Assignee: MITSUI CHEMICALS, INC.Inventors: Kaoru Ohshimizu, Hideto Ogasawara, Hiroki Ebata, Takashi Hama, Fumio Kageyama, Shintaro Mitsunaga, Nobuhiro Takizawa, Akinori Amano
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Patent number: 10253182Abstract: The problem of the invention is to provide a semi-aromatic polyamide resin composition having high rigidity, exceptional impact resistance, and exceptional zygosity with very little change in hardness associated with heating and cooling, as well as a molded article of this semi-aromatic polyamide resin composition. A semi-aromatic polyamide resin composition containing a semi-aromatic polyamide resin (A), acid-modified polyolefin resin (B), and fibrous filler (C), wherein the resin (A) contains a certain amount or more of terephthalic acid component units relative to the total number of moles of dicarboxylic acid component units, the semi-aromatic polyamide resin composition contains a certain amount or more of the resin (B), the glass transition temperature of the semi-aromatic polyamide resin composition is within a predetermined range, and the Vicat softening point of the resin (B) is within a predetermined range, is used as the semi-aromatic polyamide resin composition in order to solve this problem.Type: GrantFiled: December 19, 2014Date of Patent: April 9, 2019Assignee: MITSUI CHEMICALS, INC.Inventors: Kaoru Minagawa, Hiroki Ebata, Isao Washio, Kouichi Sano, Nobuhiro Takizawa, Akinori Amano
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Patent number: 10011715Abstract: The purpose of the present invention is to provide a polyester resin with improved mechanical properties, molding performance, and, preferably, fire retardancy. This polyester resin composition contains the following: a polyester resin (A) that has a melting point or glass transition temperature of at least 250° C.; a thermoplastic resin (B) that has an olefin-derived constitutional unit and an aromatic hydrocarbon structure and has an intrinsic viscosity ([?]), as measured in decalin at 135° C., of 0.04 to 1.0 dl/g; and a copolymer (C) that has an olefin-derived constitutional unit, an ?,?-unsaturated-carboxylic-ester-derived constitutional unit, and a cyclic oxy-hydrocarbon structure.Type: GrantFiled: November 19, 2013Date of Patent: July 3, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Isao Washio, Hideto Ogasawara, Hiroki Ebata, Fumio Kageyama, Nobuhiro Takizawa, Akinori Amano
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Patent number: 9932444Abstract: To provide: a semiaromatic polyamide which has excellent moldability, heat resistance, chemical resistance and mechanical characteristics; and a molded article of this semiaromatic polyamide. A semiaromatic polyamide (I) of the present invention contains 35-50% by mole of a structural unit derived from terephthalic acid [A], 25-40% by mole of a structural unit derived from isophthalic acid [B], 15-35% by mole of a structural unit derived from an aliphatic dicarboxylic acid [C] (provided that the total of [A], [B] and [C] is 100% by mole), and a structural unit derived from an aliphatic diamine [D] having 4-12 carbon atoms. The molar ratio ([A]/[B]) is from 65/35 to 50/50, and the molar ratio ([C]/[B]) is from 30/70 to 50/50. The melting enthalpy ([increment]H) of the semiaromatic polyamide (I) as determined by differential scanning calorimetry (DSC) is 20-40 mJ/mg, and the intrinsic viscosity of the semiaromatic polyamide (I) is 0.7-1.6 dl/g.Type: GrantFiled: November 12, 2013Date of Patent: April 3, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Isao Washio, Hiroki Ebata, Fumio Kageyama, Toshitaka Kosaka, Hideto Ogasawara, Akinori Amano, Nobuhiro Takizawa
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Patent number: 9732223Abstract: The present invention provides a semi-aromatic polyamide resin composition having exceptional impact resistance, fuel barrier properties, and injection moldability, as well as a molded article containing the same, through a semi-aromatic polyamide resin composition containing specific proportions of (A) a semi-aromatic polyamide comprising a dicarboxylic acid component comprising terephthalic acid and adipic acid and a diamine component having a linear aliphatic diamine having 4-10 carbon atoms, (B) a semi-aromatic polyamide comprising a dicarboxylic acid component having isophthalic acid and a diamine component having an aliphatic diamine having 4-15 carbon atoms, (C) an olefin polymer containing a specific amount of functional group structural units, and (D) a fibrous filler.Type: GrantFiled: July 25, 2014Date of Patent: August 15, 2017Assignee: MITSUI CHEMICALS, INC.Inventors: Isao Washio, Hiroki Ebata, Hideto Ogasawara, Nobuhiro Takizawa, Fumio Kageyama, Akinori Amano
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Publication number: 20170174863Abstract: The present invention addresses the problem of providing a polyester resin composition for reflective materials which gives a reflective material having a high reflectance. The polyester resin composition for reflective materials comprises: a polyester resin (A) comprising an alicyclic dicarboxylic acid ingredient unit (a1) and an aliphatic diol ingredient unit (b1); and a white pigment (B). The amount of the alicyclic dicarboxylic acid ingredient unit (a1) is 50 mol % or more of the amount of all the dicarboxylic acid ingredient units (a) in the polyester resin (A), and the amount of the aliphatic diol ingredient unit (b1) is 50 mol % or more of the amount of all the diol ingredient units (b) in the polyester resin (A). The alicyclic dicarboxylic acid ingredient unit (a1) comprises the cis and trans forms of cis-trans isomers, the proportion of the cis form determined by NMR being 20 mol % or higher.Type: ApplicationFiled: March 26, 2015Publication date: June 22, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Kaoru OHSHIMIZU, Hideto OGASAWARA, Hiroki EBATA, Takashi HAMA, Fumio KAGEYAMA, Shintaro MITSUNAGA, Nobuhiro TAKIZAWA, Akinori AMANO
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Publication number: 20160312027Abstract: The problem of the invention is to provide a semi-aromatic polyamide resin composition having high rigidity, exceptional impact resistance, and exceptional zygosity with very little change in hardness associated with heating and cooling, as well as a molded article of this semi-aromatic polyamide resin composition. A semi-aromatic polyamide resin composition containing a semi-aromatic polyamide resin (A), acid-modified polyolefin resin (B), and fibrous filler (C), wherein the resin (A) contains a certain amount or more of terephthalic acid component units relative to the total number of moles of dicarboxylic acid component units, the semi-aromatic polyamide resin composition contains a certain amount or more of the resin (B), the glass transition temperature of the semi-aromatic polyamide resin composition is within a predetermined range, and the Vicat softening point of the resin (B) is within a predetermined range, is used as the semi-aromatic polyamide resin composition in order to solve this problem.Type: ApplicationFiled: December 19, 2014Publication date: October 27, 2016Applicant: Mitsui Chemicals, Inc.Inventors: Kaoru MINAGAWA, Hiroki EBATA, Isao WASHIO, Kouichi SANO, Nobuhiro TAKIZAWA, Akinori AMANO
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Publication number: 20160168381Abstract: The present invention provides a semi-aromatic polyamide resin composition having exceptional impact resistance, fuel barrier properties, and injection moldability, as well as a molded article containing the same, through a semi-aromatic polyamide resin composition containing specific proportions of (A) a semi-aromatic polyamide comprising a dicarboxylic acid component comprising terephthalic acid and adipic acid and a diamine component having a linear aliphatic diamine having 4-10 carbon atoms, (B) a semi-aromatic polyamide comprising a dicarboxylic acid component having isophthalic acid and a diamine component having an aliphatic diamine having 4-15 carbon atoms, (C) an olefin polymer containing a specific amount of functional group structural units, and (D) a fibrous filler.Type: ApplicationFiled: July 25, 2014Publication date: June 16, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Isao WASHIO, Hiroki EBATA, Hideto OGASAWARA, Nobuhiro TAKIZAWA, Fumio KAGEYAMA, Akinori AMANO
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Publication number: 20160090482Abstract: The present invention is directed to a polyester resin composition for providing a reflector having excellent mechanical strength and heat resistance, maintaining high reflectance even in a heated environment such as an LED manufacturing process or a reflow soldering process, and having small change in shrinkage rate. The polyester resin composition for a reflective material is a composition comprising 30 to 80% by mass of a polyester resin (A) with a melting point or a glass transition temperature of 250° C. or more, 10 to 35% by mass of a glass fiber (B) with a minor axis of 3 to 8 ?m, 5 to 50% by mass of a white pigment (C), and 0.3 to 1.5% by mass of an olefin polymer (D) containing 0.2 to 1.8% of a functional group structural unit (all based on a total of (A), (B), (C) and (D) which is 100% by mass).Type: ApplicationFiled: May 9, 2014Publication date: March 31, 2016Applicant: MITSUI CHEMICALS., INC.Inventors: Hiroki EBATA, Hideto OGASAWARA, Isao WASHIO, Fumio KAGEYAMA, Nobuhiro TAKIZAWA, Akinori AMANO, Takashi HAMA
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Publication number: 20150329670Abstract: To provide: a semiaromatic polyamide which has excellent moldability, heat resistance, chemical resistance and mechanical characteristics; and a molded article of this semiaromatic polyamide. A semiaromatic polyamide (I) of the present invention contains 35-50% by mole of a structural unit derived from terephthalic acid [A], 25-40% by mole of a structural unit derived from isophthalic acid [B], 15-35% by mole of a structural unit derived from an aliphatic dicarboxylic acid [C] (provided that the total of [A], [B] and [C] is 100% by mole), and a structural unit derived from an aliphatic diamine [D] having 4-12 carbon atoms. The molar ratio ([A]/[B]) is from 65/35 to 50/50, and the molar ratio ([C]/[B]) is from 30/70 to 50/50. The melting enthalpy ([increment]H) of the semiaromatic polyamide (I) as determined by differential scanning calorimetry (DSC) is 20-40 mJ/mg, and the intrinsic viscosity of the semiaromatic polyamide (I) is 0.7-1.6 dl/g.Type: ApplicationFiled: November 12, 2013Publication date: November 19, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Isao WASHIO, Hiroki EBATA, Fumio KAGEYAMA, Toshitaka KOSAKA, Hideto OGASAWARA, Akinori AMANO, Nobuhiro TAKIZAWA
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Patent number: 9153757Abstract: The purpose of the present invention is to provide a thermoplastic resin composition for a reflective material which has excellent mechanical strength, excellent heat resistance, excellent high reflectance, and excellent moldability, and which makes it possible to obtain a reflective plate with little decline in reflectance caused by heating. A first embodiment of this thermoplastic resin composition for a reflective material includes: a polyester resin (A) that has a melting point or glass transition temperature of 250° C. or higher and includes an alicyclic hydrocarbon structure; a thermoplastic resin (B) that has a polyolefin backbone and a functional group; a white pigment (C); and an inorganic filler (D); the thermoplastic resin (B) either including 0.1 to 1.8 wt % of a functional group unit (B1) that further includes a heteroatom, or further including an aromatic hydrocarbon structure (B2), and the limiting viscosity [?] being 0.04 to 1.0 dl/g.Type: GrantFiled: July 31, 2012Date of Patent: October 6, 2015Assignee: MITSUI CHEMICALS, INC.Inventors: Hideto Ogasawara, Takashi Hama, Kuniaki Kawabe, Hirotaka Kanaya, Nobuhiro Takizawa, Akinori Amano, Hiroki Ebata, Kan Komiya
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Patent number: 9151455Abstract: The purpose of the present invention is to provide a thermoplastic resin composition for a reflector plate with which it is possible to obtain a molded article having excellent moldability, high mechanical strength, excellent heat resistance and a high reflectance that is stable over time, and it is possible to obtain a reflector plate with which there is little reduction in reflectance due to heating. The thermoplastic resin composition for a reflector of the invention comprises 30 to 80 weight % of a thermoplastic resin (A) having structural units containing carbonyl groups and a melting point or glass transition temperature of 250° C. or higher, 10 to 50 weight % of an inorganic filler (B) containing an inorganic filler (B-1) that comprises a carbonyl structure and has an aspect ratio of 10 to 100, and 5 to 50 weight % of a white pigment (C).Type: GrantFiled: June 7, 2012Date of Patent: October 6, 2015Assignee: MITSUI CHEMICALS, INC.Inventors: Hideto Ogasawara, Takashi Hama, Nobuhiro Takizawa, Akinori Amano
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Publication number: 20150274964Abstract: The purpose of the present invention is to provide a polyester resin with improved mechanical properties, molding performance, and, preferably, fire retardancy. This polyester resin composition contains the following: a polyester resin (A) that has a melting point or glass transition temperature of at least 250° C.; a thermoplastic resin (B) that has an olefin-derived constitutional unit and an aromatic hydrocarbon structure and has an intrinsic viscosity ([?]), as measured in decalin at 135° C., of 0.04 to 1.0 dl/g; and a copolymer (C) that has an olefin-derived constitutional unit, an ?,?-unsaturated-carboxylic-ester-derived constitutional unit, and a cyclic oxy-hydrocarbon structure.Type: ApplicationFiled: November 19, 2013Publication date: October 1, 2015Applicant: Mitsui Chemicals, Inc.Inventors: Isao Washio, Hideto Ogasawara, Hiroki Ebata, Fumio Kageyama, Nobuhiro Takizawa, Akinori Amano
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Publication number: 20140167091Abstract: The purpose of the present invention is to provide a thermoplastic resin composition for a reflective material which has excellent mechanical strength, excellent heat resistance, excellent high reflectance, and excellent moldability, and which makes it possible to obtain a reflective plate with little decline in reflectance caused by heating. A first embodiment of this thermoplastic resin composition for a reflective material includes: a polyester resin (A) that has a melting point or glass transition temperature of 250° C. or higher and includes an alicyclic hydrocarbon structure; a thermoplastic resin (B) that has a polyolefin backbone and a functional group; a white pigment (C); and an inorganic filler (D); the thermoplastic resin (B) either including 0.1 to 1.8 wt % of a functional group unit (B1) that further includes a heteroatom, or further including an aromatic hydrocarbon structure (B2), and the limiting viscosity [?] being 0.04 to 1.0 dl/g.Type: ApplicationFiled: July 31, 2012Publication date: June 19, 2014Applicant: Mitsui Chemicals, Inc.Inventors: Hideto Ogasawara, Takashi Hama, Kuniaki Kawabe, Hirotaka Kanaya, Nobuhiro Takizawa, Akinori Amano, Hiroki Ebata, Kan Komiya
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Publication number: 20140097737Abstract: The purpose of the present invention is to provide a thermoplastic resin composition for a reflector plate with which it is possible to obtain a molded article having excellent moldability, high mechanical strength, excellent heat resistance and a high reflectance that is stable over time, and it is possible to obtain a reflector plate with which there is little reduction in reflectance due to heating. The thermoplastic resin composition for a reflector of the invention comprises 30 to 80 weight % of a thermoplastic resin (A) having structural units containing carbonyl groups and a melting point or glass transition temperature of 250° C. or higher, 10 to 50 weight % of an inorganic filler (B) containing an inorganic filler (B-1) that comprises a carbonyl structure and has an aspect ratio of 10 to 100, and 5 to 50 weight % of a white pigment (C).Type: ApplicationFiled: June 7, 2012Publication date: April 10, 2014Applicant: Mitsui Chemicals Inc.Inventors: Hideto Ogasawara, Takashi Hama, Nobuhiro Takizawa, Akinori Amano
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Patent number: 6383982Abstract: A color developer composition comprising (A) a color developer containing a polyvalent metal salt of a salicylic acid derivative, and (B) a polyester polyol having in the molecule skeleton at least one carbonate bond or ester bond, and a derivative thereof, an aqueous dispersion and a color developing ink using this color developer composition, and a recording sheet having a layer containing this color developer composition on a base material.Type: GrantFiled: May 2, 2000Date of Patent: May 7, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Jotaro Kida, Yoshimitsu Tanabe, Nobuhiro Takizawa, Masakatsu Nakatsuka
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Patent number: 5580918Abstract: A polyimide resin composition comprising 50-95 parts by weight of a polyimide resin represented by the following formula (1): ##STR1## wherein X represents a direct bond, a hydrocarbon group, a carbonyl group, a thio group or so, Y.sub.1 -Y.sub.4 individually represent a hydrogen atom, a lower alkyl group or so and R.sub.1 represents an aliphatic group, an aromatic group or so; and 50-5 parts by weight of a polyetheretherketone, said composition having been subjected to heat treatment at 250.degree.-330.degree. C. and, after the heat-treatment, having crystallization enthalpy of 0-6 cal/g.The heat treatment of the polyimide resin composition can be effected at a low temperature in a short time. The polyimide resin composition has excellent dimensional stability and high-temperature physical properties. Moreover, it has excellent moldability and peeling resistance.Type: GrantFiled: February 16, 1994Date of Patent: December 3, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Atsushi Morita, Yoshihisa Gotoh, Toshiaki Takahashi, Kayako Ito, Hiroyasu Oochi, Tomohito Koba, Katunori Simamura, Hiroaki Tomimoto, Nobuhiro Takizawa