Patents by Inventor Kentaro Takesada
Kentaro Takesada 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: 11685827Abstract: A polyvinyl chloride composition for powder molding includes a polyvinyl chloride (A) an amount of 100 parts by mass, a plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less, and an acrylic polymer in an amount of 4 parts by mass or more and 23 parts by mass or less. The polyvinyl chloride (A) has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,350 or more. The acrylic polymer has an average particle diameter of 0.01 ?m or more and 10 ?m or less and contains a constitutional unit derived from a (meth) acrylic ester in an amount of 50 mass % or more.Type: GrantFiled: October 12, 2018Date of Patent: June 27, 2023Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Kohei Hosomi
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Patent number: 11643541Abstract: A composition of polyvinyl chloride for powder molding may include a polyvinyl chloride (A), a polyvinyl chloride (B), and a phosphate, among others. The polyvinyl chloride (A) may have an average particle diameter of 50 to 500 ?m, and the polyvinyl chloride (B) may have an average particle diameter of 0.01 ?m or more and less than 50 ?m. An average polymerization degree of the polyvinyl chloride (A) may be 1350 or more, and the phosphate may comprise a polyoxyalkylene alkyl phosphate.Type: GrantFiled: August 21, 2018Date of Patent: May 9, 2023Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Nobuyuki Shimizu
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Patent number: 11312848Abstract: The present invention relates to a powder slush molded body of a polyvinyl chloride composition, the polyvinyl chloride composition containing a polyvinyl chloride, a plasticizer, and an acrylic polymer. The polyvinyl chloride composition contains the plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the polyvinyl chloride. When a cross section of the powder slush molded body extending in parallel with a thickness direction is observed under an optical microscope using reflected light, irregular scale-like polyvinyl chloride particles having a long diameter of 30 ?m or more and 500 ?m or less are continuous with one another via interfacial portions, and the number of aggregated particles of the acrylic polymer having a long diameter of 30 ?m or more and 100 ?m or less is 10 particles/mm2 or less.Type: GrantFiled: October 12, 2018Date of Patent: April 26, 2022Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Kohei Hosomi
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Patent number: 11312849Abstract: A composition of polyvinyl for powder molding may include a polyvinyl chloride (A), a polyvinyl chloride (B), a plasticizer, and an alkyl phosphate. The polyvinyl chloride (A) may have an average particle diameter of 50 ?m to 500 ?m, and the polyvinyl chloride (B) may have an average particle diameter of 0.01 ?m or more and less than 50 ?m. An average polymerization degree of the polyvinyl chloride (A) may be 1350 or more, the alkyl phosphate may comprise a mono-alkyl phosphate, and the number of carbon atoms of an alkyl group in the alkyl phosphate may be 5 or more.Type: GrantFiled: August 21, 2018Date of Patent: April 26, 2022Assignees: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Nobuyuki Shimizu, Shigehiro Kanou
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Publication number: 20210363343Abstract: A polyvinyl chloride composition for powder molding includes 100 parts by mass of a polyvinyl chloride, 120 parts by mass or more and 200 parts by mass or less of a polyester-based plasticizer, and 4 parts by mass or more and 23 parts by mass or less of an acrylic polymer. The polyvinyl chloride has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,700 or more. The acrylic polymer contains 40 mass % or more and 95 mass % or less of a constitutional unit derived from methyl (meth)acrylate, and 5 mass % or more and 60 mass % or less of a constitutional unit derived from at least one (meth)acrylic ester selected from the group consisting of a (meth)acrylic ester of an aliphatic alcohol having two or more carbon atoms and a (meth)acrylic ester of an aromatic alcohol.Type: ApplicationFiled: August 6, 2021Publication date: November 25, 2021Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL., lTD.Inventors: Kentaro Takesada, Junpei Wakamatsu, Kohei Hosomi
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Publication number: 20210179833Abstract: A composition of polyvinyl chloride for powder molding may include a polyvinyl chloride (A), a polyvinyl chloride (B), and a phosphate, among others. The polyvinyl chloride (A) may have an average particle diameter of 50 to 500 and the polyvinyl chloride (B) may have an average particle diameter of 0.01 ?m or more and less than 50 An average polymerization degree of the polyvinyl chloride (A) may be 1350 or more, and the phosphate may comprise a polyoxyalkylene alkyl phosphate.Type: ApplicationFiled: August 21, 2018Publication date: June 17, 2021Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Nobuyuki Shimizu
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Publication number: 20200332106Abstract: The present invention relates to a powder slush molded body of a polyvinyl chloride composition, the polyvinyl chloride composition containing a polyvinyl chloride, a plasticizer, and an acrylic polymer. The polyvinyl chloride composition contains the plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the polyvinyl chloride. When a cross section of the powder slush molded body extending in parallel with a thickness direction is observed under an optical microscope using reflected light, irregular scale-like polyvinyl chloride particles having a long diameter of 30 ?m or more and 500 ?m or less are continuous with one another via interfacial portions, and the number of aggregated particles of the acrylic polymer having a long diameter of 30 ?m or more and 100 ?m or less is 10 particles/mm2 or less.Type: ApplicationFiled: October 12, 2018Publication date: October 22, 2020Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Kohei Hosomi
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Publication number: 20200291215Abstract: A composition of polyvinyl for powder molding may include a polyvinyl chloride (A), a polyvinyl chloride (B), a plasticizer, and an alkyl phosphate. The polyvinyl chloride (A) may have an average particle diameter of 50 ?m to 500 ?m, and the polyvinyl chloride (B) may have an average particle diameter of 0.01 ?m or more and less than 50 ?m. An average polymerization degree of the polyvinyl chloride (A) may be 1350 or more, the alkyl phosphate may comprise a mono-alkyl phosphate, and the number of carbon atoms of an alkyl group in the alkyl phosphate may be 5 or more.Type: ApplicationFiled: August 21, 2018Publication date: September 17, 2020Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Nobuyuki Shimizu, Shigehiro Kanou
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Publication number: 20200255644Abstract: The present invention relates to a polyvinyl chloride composition for powder molding including a polyvinyl chloride (A) in an amount of 100 parts by mass, a plasticizer in an amount of 110 parts by mass or more and 150 parts by mass or less, and an acrylic polymer in an amount of 4 parts by mass or more and 23 parts by mass or less. The polyvinyl chloride (A) has an average particle diameter of 50 ?m or more and 500 ?m or less and an average degree of polymerization of 1,350 or more. The acrylic polymer has an average particle diameter of 0.01 ?m or more and 10 ?m or less and contains a constitutional unit derived from a (meth)acrylic ester in an amount of 50 mass % or more. The (meth)acrylic ester includes at least one selected from the group consisting of (meth)acrylic ester of an aliphatic alcohol having two or more carbon atoms and a (meth)acrylic ester of an aromatic alcohol.Type: ApplicationFiled: October 12, 2018Publication date: August 13, 2020Applicants: KANEKA CORPORATION, TATSUTA CHEMICAL CO., LTD.Inventors: Kentaro Takesada, Kohei Hosomi
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Patent number: 7449521Abstract: The present invention provides an acrylic elastomer composition including an acrylic elastomer (A) and a polyorganosiloxane-containing graft polymer (B), and having excellent formability and mechanical physical properties, and both low-temperature characteristics and oil resistance. Acrylic rubber and an acrylic block copolymer can be used as the acrylic elastomer (A).Type: GrantFiled: March 19, 2004Date of Patent: November 11, 2008Assignee: Kaneka CorporationInventors: Kentaro Takesada, Takao Manabe
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Patent number: 7407694Abstract: The present invention relates to a block copolymer (A) including a (meth)acrylic polymer block (a) and an acrylic polymer block (b). The (meth)acrylic polymer block (a) is preferably copolymerized with a monomer having a functional group having high cohesive force, such as a carboxyl group, so that the 5%-weight-loss temperature is 300° C. or more or the tensile strength is 3 MPa or more, and the hardness measured by a type A durometer according to JIS K6253 is 50 or less, and a compression set measured after 22 hours at 70° C. is 45% or less. The block copolymer (A) exhibits excellent thermal decomposition resistance and low compression set at high temperatures. The block copolymer (A) can be used as a soft material for automobile, and has low hardness, high adhesion, high oil resistance, high weather resistance, high heat resistance, high recycling property, high tensile properties, and high wax remover resistance.Type: GrantFiled: August 11, 2005Date of Patent: August 5, 2008Assignee: Kaneka CorporationInventors: Akio Taniguchi, Kentaro Takesada, Yutaka Kaneda, Tadashi Kokubo, Nobuaki Ohshiro, Atsushi Kumasaki, Takeshi Chiba, Tomoki Hiiro
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Publication number: 20080097031Abstract: The present invention provides a thermoplastic elastomer composition having excellent injection moldability and producing molded products having high flexibility, low-temperature characteristics, both heat resistance and oil resistance, and excellent fatigue strength. The thermoplastic elastomer composition contains (A) an acrylic block copolymer and (B) an olefin thermoplastic elastomer, or further contains (C) a compatibilizer in addition to the components (A) and (B).Type: ApplicationFiled: July 19, 2005Publication date: April 24, 2008Inventor: Kentaro Takesada
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Patent number: 7309736Abstract: The present invention provides a novel acrylic block copolymer rich in flexibility and excellent in mechanical strength, moldability, oil resistance, heat resistance, thermal decomposition resistance, weather resistance, and compression set, and further rich in reactivity. The present invention also provides compositions, seal products, and automobile, electric, and electronic parts, all of which include the acrylic block copolymer. The acrylic block copolymer includes a methacrylic polymer block (a) and an acrylic polymer block (b), at least one of the polymer blocks containing, in its main chain, at least one acid anhydride group (c) represented by formula (1): (wherein R1s each represent hydrogen or a methyl group and may be the same or different, n represents an integer of 0 to 3, and m represents an integer of 0 or 1).Type: GrantFiled: July 31, 2003Date of Patent: December 18, 2007Assignee: Kaneka CorporationInventors: Akio Taniguchi, Tadashi Kokubo, Kentaro Takesada, Kozo Kondo, Takeshi Chiba, Atsushi Kumasaki, Yutaka Kaneda
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Publication number: 20060183858Abstract: The present invention provides an acrylic elastomer composition including an acrylic elastomer (A) and a polyorganosiloxane-containing graft polymer (B), and having excellent formability and mechanical physical properties, and both low-temperature characteristics and oil resistance. Acrylic rubber and an acrylic block copolymer can be used as the acrylic elastomer (A).Type: ApplicationFiled: March 19, 2004Publication date: August 17, 2006Inventors: Kentaro Takesada, Takao Manabe
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Publication number: 20050272865Abstract: The present invention relates to a block copolymer (A) including a (meth)acrylic polymer block (a) and an acrylic polymer block (b). The (meth)acrylic polymer block (a) is preferably copolymerized with a monomer having a functional group having high cohesive force, such as a carboxyl group, so that the 5%-weight-loss temperature is 300° C. or more or the tensile strength is 3 MPa or more, and the hardness measured by a type A durometer according to JIS K6253 is 50 or less, and a compression set measured after 22 hours at 70° C. is 45% or less. The block copolymer (A) exhibits excellent thermal decomposition resistance and low compression set at high temperatures. The block copolymer (A) can be used as a soft material for automobile, and has low hardness, high adhesion, high oil resistance, high weather resistance, high heat resistance, high recycling property, high tensile properties, and high wax remover resistance.Type: ApplicationFiled: August 11, 2005Publication date: December 8, 2005Inventors: Akio Taniguchi, Kentaro Takesada, Yutaka Kaneda, Tadashi Kokubo, Nobuaki Ohshiro, Atsushi Kumasaki, Takeshi Chiba, Tomoki Hiiro
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Publication number: 20050234199Abstract: The present invention provides a novel acrylic block copolymer rich in flexibility and excellent in mechanical strength, moldability, oil resistance, heat resistance, thermal decomposition resistance, weather resistance, and compression set, and further rich in reactivity. The present invention also provides compositions, seal products, and automobile, electric, and electronic parts, all of which include the acrylic block copolymer. The acrylic block copolymer includes a methacrylic polymer block (a) and an acrylic polymer block (b), at least one of the polymer blocks containing, in its main chain, at least one acid anhydride group (c) represented by formula (1): (wherein R1s each represent hydrogen or a methyl group and may be the same or different, n represents an integer of 0 to 3, and m represents an integer of 0 or 1).Type: ApplicationFiled: July 31, 2003Publication date: October 20, 2005Applicant: Kaneka CorporationInventors: Akio Taniguchi, Tadashi Kokubo, Kentaro Takesada, Kozo Kondo, Takeshi Chiba, Atsushi Kumasaki, Yutaka Kaneda
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Publication number: 20050085592Abstract: The present invention relates to a block copolymer (A) including a (meth)acrylic polymer block (a) and an acrylic polymer block (b). The (meth)acrylic polymer block (a) is preferably copolymerized with a monomer having a functional group having high cohesive force, such as a carboxyl group, so that the 5%-weight-loss temperature is 300° C. or more or the tensile strength is 3 MPa or more, and the hardness measured by a type A durometer according to JIS K6253 is 50 or less, and a compression set measured after 22 hours at 70° C. is 45% or less. The block copolymer (A) exhibits excellent thermal decomposition resistance and low compression set at high temperatures. The block copolymer (A) can be used as a soft material for automobile, and has low hardness, high adhesion, high oil resistance, high weather resistance, high heat resistance, high recycling property, high tensile properties, and high wax remover resistance.Type: ApplicationFiled: February 12, 2003Publication date: April 21, 2005Inventors: Akio Taniguchi, Kentaro Takesada, Yutaka Keneda, Tadashi Kokubo, Nobuaki Ohshiro, Atsushi Kumasaki, Takeshi Chiba, Tomoki Hiiro
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Patent number: 6204327Abstract: A vinyl chloride resin composition containing a graft copolymer A having an average particle diameter of at least 0.15 &mgr;m, prepared by polymerizing 50 to 90% of a solid matter of a rubber latex having a glass transition temperature of at most O° C., the rubber latex being prepared by polymerizing 50 to 100% of butadiene and/or alkyl acrylate, 0 to 40% of an aromatic vinyl monomer, 0 to 10% of a vinyl monomer and 0 to 5% of a polyfunctional monomer, with 10 to 50% of a mixture comprising 10 to 100% of an alkyl methacrylate, 0 to 90% of an aromatic vinyl monomer, 0 to 25% of a vinyl cyamide monomer and 0 to 20% of a vinyl monomer; a graft copolymer B having an average particle diameter of 0.05 to 0.Type: GrantFiled: April 27, 1999Date of Patent: March 20, 2001Assignee: Kaneka CorporationInventors: Akira Takaki, Shinichi Yauchi, Koji Yui, Riichi Nishimura, Kentaro Takesada