Patents by Inventor Takenobu Sunagawa
Takenobu Sunagawa 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: 20090124725Abstract: The present invention provides a viscosity modifier (A) for thermoplastic polyester resin obtainable by polymerizing (a) 70 to 95% by weight of an aromatic vinyl monomer, (b) 5 to 30% by weight of an alkyl acrylate having an alkyl group with 1 to 8 carbon atoms, and (c) 0 to 10% by weight of other vinyl monomers copolymerizable with both; a viscosity modifier (A?) for thermoplastic polyester resin characterized by covering 100 parts by weight of polymer particles (A-1) with 0.5 to 30 parts by weight of polymer particles (A-2), the polymer particle (A-1) are obtained by polymerizing (a) 70 to 95% by weight of an aromatic vinyl monomer, (b) 5 to 30% by weight of an alkyl acrylate having an alkyl group with 1 to 8 carbon atoms, and (c) 0 to 10% by weight of other vinyl monomers copolymerizable with both and having a glass transition temperature of 60° C. or higher and a volume-average particle diameter of 50 to 500 ?m, and the polymer particles (A-2) have volume-average particle diameter of 0.01 to 0.Type: ApplicationFiled: September 19, 2006Publication date: May 14, 2009Inventor: Takenobu Sunagawa
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Publication number: 20070197728Abstract: Generation of air marks and flow marks is prevented when a vinyl chloride resin is molded into a sheet or the like. To a vinyl chloride resin is added a processing aid for a vinyl chloride resin comprising a copolymer composition containing, (A) 70 to 99 parts by weight of a copolymer obtained by polymerizing a monomer mixture comprising 50 to 99% by weight of methyl methacrylate, 1 to 50% by weight of an aromatic vinyl compound and 0 to 30% by weight of another monomer copolymerizable with these components, said copolymer having a specific viscosity at 30° C. of 0.3 to 1.8 when 0.Type: ApplicationFiled: April 18, 2007Publication date: August 23, 2007Inventors: Mitsutaka Sato, Takenobu Sunagawa, Mamoru Kadokura
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Publication number: 20070149687Abstract: The present invention relates to a viscosity modifier for a thermoplastic polyester resin comprising 100 parts by weight of polymer particles prepared by suspension polymerization having a glass transition temperature of at least 60° C. and volume average particle size of 50 to 500 ?m, which are coated with 0.5 to 30 parts by weight of an emulsion polymer prepared by emulsion polymerization, wherein the polymer particles prepared by suspension polymerization have reactivity with thermoplastic polyester resin, a thermoplastic polyester resin composition and a molded article.Type: ApplicationFiled: April 14, 2005Publication date: June 28, 2007Applicant: Kaneka CoporationInventors: Takenobu Sunagawa, Yasushi Nakanishi, Takashi Ueda, Yoshinori Takeda, Kazunori Saegusa
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Patent number: 7105602Abstract: The present invention provides a processing aid for thermoplastic resin having a weight average molecular weight of 10,000 to 300,000, which is obtained by polymerizing an alkyl (meth)acrylate, or an alkyl (meth)acrylate and another vinyl monomer copolymerizable therewith, in the presence of a mercaptan having an alkyl ester group with C4-20 alkyl group as a chain transfer agent, and/or an organic peroxide having a tertiary-butyl peroxy group as a polymerization initiator.Type: GrantFiled: April 14, 2000Date of Patent: September 12, 2006Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Riichi Nishimura, Toshiyuki Mori, Akira Takaki
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Publication number: 20060116496Abstract: 0.1 to 50 parts of a viscosity modifier for thermoplastic polyester resin comprising (a) 15 to 95% by weight alkyl (meth)acrylate containing an epoxy group, (b) 5 to 85% by weight of another alkyl (meth)acrylate and (c) 0 to 80% by weight of another vinyl monomer copolymerizable therewith and having weight average molecular weight of 1,000 to 400,000 is compounded, based on 100 parts by weight of a thermoplastic polyester resin. As a result, melt viscosity of thermoplastic polyester resin can be efficiently improved, stable processability is exhibited in extrusion molding, blow molding and calender molding, particularly profile extrusion and extrusion molding of boards and pipes which are extremely difficult, and a molded article having favorable surface properties is obtained.Type: ApplicationFiled: October 28, 2003Publication date: June 1, 2006Inventors: Takenobu Sunagawa, Hiroshi Tone, Hideyuki Sakamoto, Yasushi Nakanishi, Mamoru Kadokura
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Publication number: 20060041056Abstract: The present invention provides a thermoplastic polyester resin composition, which exhibits stable processability in extrusion molding, blow molding and calender molding, particularly in profile extrusion and extrusion molding of boards and pipes, by efficiently enhancing melt viscosity of thermoplastic polyester resin, and gives a molded article having favorable surface properties and excellent impact strength. By compounding (B) 0.Type: ApplicationFiled: November 6, 2003Publication date: February 23, 2006Applicant: Kaneka CorporationInventors: Takenobu Sunagawa, Hiroshi Tone, Hideyuki Sakamoto, Hiroki Nakajima, Yasushi Nakanishi, Mamoru Kadokura
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Patent number: 6812264Abstract: A foamable polyester resin composition comprising (A) 100 parts by weight of a polyester resin, (B) from 0.5 to 30 parts by weight of a (meth)acrylic ester polymer or a polymer mixture obtained by polymerizing from 0 to 50 parts by weight of a monomer mixture (b) in the presence of a polymer latex which is obtained by emulsion-polymerizing from 50 to 100 parts by weight of a monomer mixture (a) wherein, when 0.1 g of the polymer is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.7 to 1.9 as measured at 30° C. (wherein the sum of the monomer mixtures (a) and (b) being 100 parts by weight), wherein, when 0.1 g of the (meth)acrylic ester polymer or the polymer mixture is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.65 to 1.7 as measured at 30° C., (C) from 0.1 to 30 parts by weight of a filler, (D) a blowing agent.Type: GrantFiled: March 10, 2003Date of Patent: November 2, 2004Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Mamoru Kadokura
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Publication number: 20040171741Abstract: Generation of air marks and flow marks is prevented when a vinyl chloride resin is molded into a sheet or the like. To a vinyl chloride resin is added a processing aid for a vinyl chloride resin comprising a copolymer composition containing, (A) 70 to 99 parts by weight of a copolymer obtained by polymerizing a monomer mixture comprising 50 to 99% by weight of methyl methacrylate, 1 to 50% by weight of an aromatic vinyl compound and 0 to 30% by weight of another monomer copolymerizable with these components, said copolymer having a specific viscosity at 30° C. of 0.3 to 1.8 when 0.Type: ApplicationFiled: January 6, 2004Publication date: September 2, 2004Inventors: Mitsutaka Sato, Takenobu Sunagawa, Mamoru Kadokura
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Patent number: 6765033Abstract: An expandable vinyl chloride resin composition that the expansion ratio of a vinyl chloride resin can be greatly increased by the use of thermally decomposable inorganic blowing agents without the use of organic solvent blowing agents, and which comprises 100 parts by weight of a vinyl chloride resin, 5 to 30 parts by weight of, as a processing aid, a (meth)acrylic acid ester polymer having a specific viscosity of not less than 0.73 measured at 30° C. with respect to a solution of 0.1 g of the polymer dissolved in 100 ml of chloroform, and 2 to 25 parts by weight of a thermally decomposable inorganic blowing agent.Type: GrantFiled: August 17, 2000Date of Patent: July 20, 2004Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Noriko Sakashita, Toshiyuki Mori, Akira Takaki
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Patent number: 6723762Abstract: There is provided a foamable poly(vinyl chloride) resin composition which can remarkably improve an expansion ratio. There is used a foamable poly(vinyl chloride) resin composition comprising 100 parts by weight of (A) a poly(vinyl chloride) resin, 0.5 to 30 parts by weight of (B) a processing aid, and 0.Type: GrantFiled: March 7, 2002Date of Patent: April 20, 2004Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Noriko Sakashita, Mitsutaka Sato, Mamoru Kadokura
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Patent number: 6635687Abstract: An expandable vinyl chloride resin composition which can provide foamed articles having a greatly enhanced expansion ratio without remarkably lowering the surface property and strength by the use of thermally decomposable blowing agents without the use of organic solvent blowing agents, and which comprises 100 parts by weight of a vinyl chloride resin, 0.5 to 30 parts by weight of, as a processing aid, a two stage (meth)acrylic ester polymer having a specific viscosity of at least 0.5 (0.1 % chloroform solution, 30° C.) prepared by polymerizing a monomer component containing as a main component a monomer selected from acrylic esters and methacrylic esters excepting methyl methacrylate in the presence of a latex of a methyl methacrylate polymer having a specific viscosity of at least 0.7, 0.3 to 25 parts by weight of a thermally decomposable inorganic blowing agent, 0.01 to 15 parts by weight of a thermally decomposable organic blowing agent and 0 to 20 parts by weight of a filler.Type: GrantFiled: March 7, 2002Date of Patent: October 21, 2003Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Mitsutaka Sato, Mamoru Kadokura
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Publication number: 20030187127Abstract: A foamable polyester resin composition comprising (A) 100 parts by weight of a polyester resin, (B) from 0.5 to 30 parts by weight of a (meth)acrylic ester polymer or a polymer mixture obtained by polymerizing from 0 to 50 parts by weight of a monomer mixture (b) in the presence of a polymer latex which is obtained by emulsion-polymerizing from 50 to 100 parts by weight of a monomer mixture (a) wherein, when 0.1 g of the polymer is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.7 to 1.9 as measured at 30° C. (wherein the sum of the monomer mixtures (a) and (b) being 100 parts by weight), wherein, when 0.1 g of the (meth)acrylic ester polymer or the polymer mixture is dissolved in 100 mL of chloroform, the resulting solution has a specific viscosity of from 0.65 to 1.7 as measured at 30° C., (C) from 0.1 to 30 parts by weight of a filler, (D) a blowing agent.Type: ApplicationFiled: March 10, 2003Publication date: October 2, 2003Inventors: Takenobu Sunagawa, Mamoru Kadokura
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Patent number: 6610757Abstract: An expandable vinyl chloride resin composition that the expansion ratio of a vinyl chloride resin can be greatly increased by the use of thermally decomposable inorganic blowing agents without the use of organic solvent blowing agents, and which comprises 100 parts by weight of a vinyl chloride resin, 0.5 to 30 parts by weight of, as a processing aid, a (meth)acrylic acid ester polymer having a specific viscosity of not less than 0.73 measured at 30° C. with respect to a solution of 0.1 g of the polymer dissolved in 100 ml of chloroform, and not less than 0.3 to less than 2 parts by weight of a thermally decomposable inorganic blowing agent such as sodium bicarbonate.Type: GrantFiled: October 31, 2001Date of Patent: August 26, 2003Assignee: Kaneka CorporationInventors: Takenobu Sunagawa, Mitsutaka Sato, Noriko Sakashita, Mamoru Kadokura
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Publication number: 20030027881Abstract: An expandable vinyl chloride resin composition which can provide foamed articles having a greatly enhanced expansion ratio without remarkably lowering the surface property and strength by the use of thermally decomposable blowing agents without the use of organic solvent blowing agents, and which comprises 100 parts by weight of a vinyl chloride resin, 0.5 to 30 parts by weight of, as a processing aid, a two stage (meth)acrylic ester polymer having a specific viscosity of at least 0.5 (0.1 % chloroform solution, 30° C.) prepared by polymerizing a monomer component containing as a main component a monomer selected from acrylic esters and methacrylic esters excepting methyl methacrylate in the presence of a latex of a methyl methacrylate polymer having a specific viscosity of at least 0.7, 0.3 to 25 parts by weight of a thermally decomposable inorganic blowing agent, 0.01 to 15 parts by weight of a thermally decomposable organic blowing agent and 0 to 20 parts by weight of a filler.Type: ApplicationFiled: March 7, 2002Publication date: February 6, 2003Inventors: Takenobu Sunagawa, Mitsutaka Sato, Mamoru Kadokura
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Publication number: 20020198276Abstract: An expandable vinyl chloride resin composition that the expansion ratio of a vinyl chloride resin can be greatly increased by the use of thermally decomposable inorganic blowing agents without the use of organic solvent blowing agents, and which comprises 100 parts by weight of a vinyl chloride resin, 0.5 to 30 parts by weight of, as a processing aid, a (meth)acrylic acid ester polymer having a specific viscosity of not less than 0.73 measured at 30° C. with respect to a solution of 0.1 g of the polymer dissolved in 100 ml of chloroform, and not less than 0.3 to less than 2 parts by weight of a thermally decomposable inorganic blowing agent such as sodium bicarbonate.Type: ApplicationFiled: October 31, 2001Publication date: December 26, 2002Inventors: Takenobu Sunagawa, Mitsutaka Sato, Noriko Sakashita, Mamoru Kadokura