Patents by Inventor Sadanori Kumazawa

Sadanori Kumazawa 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).

  • Patent number: 10696785
    Abstract: A diol composition includes a diol as a major component and has an electrical conductivity of 0.6 to 30 mS/m.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: June 30, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Masateru Ito, Izumi Morita, Kenji Kawamura, Tetsuya Yamada, Sadanori Kumazawa, Katsushige Yamada
  • Publication number: 20200172726
    Abstract: A thermoplastic polyester resin composition has an excellent retention stability and is capable of producing a molded article excellent in mechanical properties and heat resistance as well as in long-term hydrolysis resistance; and the molded article. The thermoplastic polyester resin includes 100 parts by weight of a thermoplastic polyester resin (A) and 0.1 to 10 parts by weight of a biphenyl aralkyl-type epoxy resin or cyclopentadiene-type epoxy resin (B) of a specific type.
    Type: Application
    Filed: February 4, 2020
    Publication date: June 4, 2020
    Inventors: Yusuke Tojo, Kentaro Togawa, Daisuke Sato, Sadanori Kumazawa
  • Patent number: 9505926
    Abstract: The present invention includes a flame-retardant thermoplastic polyester resin composition which provides a molded article having excellent tracking resistance and excellent mechanical characteristics, while maintaining high flame retardancy; and a molded article which is obtained by molding the flame-retardant thermoplastic polyester resin composition. A flame-retardant thermoplastic polyester resin composition of an embodiment of the present invention contains 1-70 parts by weight of two or more (C) phosphorus-containing flame retardants that are selected from the group consisting of (C-1) condensed phosphoric acid esters, (C-2) phosphazene compounds and (C-3) organic metal phosphinates and 1-90 parts by weight of (D) a nitrogen-containing flame retardant per 100 parts by weight of the total of 50-95 parts by weight of (A) a thermoplastic polyester resin and 5-50 parts by weight of (B) a methacrylic resin.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 29, 2016
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Kentaro Togawa, Daisuke Sato, Sadanori Kumazawa
  • Publication number: 20160289445
    Abstract: A thermoplastic polyester resin composition has an excellent retention stability and is capable of producing a molded article excellent in mechanical properties and heat resistance as well as in long-term hydrolysis resistance; and the molded article. The thermoplastic polyester resin includes 100 parts by weight of a thermoplastic polyester resin (A) and 0.1 to 10 parts by weight of a biphenyl aralkyl-type epoxy resin or cyclopentadiene-type epoxy resin (B) of a specific type.
    Type: Application
    Filed: September 4, 2014
    Publication date: October 6, 2016
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yusuke Tojo, Kentaro Togawa, Daisuke Sato, Sadanori Kumazawa
  • Publication number: 20150225564
    Abstract: The present invention includes a flame-retardant thermoplastic polyester resin composition which provides a molded article having excellent tracking resistance and excellent mechanical characteristics, while maintaining high flame retardancy; and a molded article which is obtained by molding the flame-retardant thermoplastic polyester resin composition. A flame-retardant thermoplastic polyester resin composition of an embodiment of the present invention contains 1-70 parts by weight of two or more (C) phosphorus-containing flame retardants that are selected from the group consisting of (C-1) condensed phosphoric acid esters, (C-2) phosphazene compounds and (C-3) organic metal phosphinates and 1-90 parts by weight of (D) a nitrogen-containing flame retardant per 100 parts by weight of the total of 50-95 parts by weight of (A) a thermoplastic polyester resin and 5-50 parts by weight of (B) a methacrylic resin.
    Type: Application
    Filed: July 17, 2013
    Publication date: August 13, 2015
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Kentaro Togawa, Daisuke Sato, Sadanori Kumazawa
  • Patent number: 9080008
    Abstract: The present invention is directed to a method for producing a polylactic acid resin, including the step of subjecting a crystallized prepolymer, which is a prepolymer including a lactic acid unit as a main component, and has an optical purity (Ea) of 60 to 94%, a weight average molecular weight of 5,000 to 100,000, and a crystal melting enthalpy (?Hma) of 4 to 50 J/g, to solid phase polymerization. According to the present invention, it is possible to obtain a polylactic acid resin which is excellent in moldability upon melt processing and drawdown resistance upon melt processing, and is also excellent in hydrolysis resistance.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: July 14, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Tsuyoshi Tanaka, Sadanori Kumazawa, Hiroyuki Ome
  • Patent number: 9045631
    Abstract: A thermoplastic resin composition obtained by mixing 100 parts by weight of at least one thermoplastic resin (A) with 0.1 to 4 parts by weight of (B) a polyfunctional compound having three or more functional groups in which at least one of the terminal structures having the functional groups is a structure represented by formula (1): where R is an alkylene group with 1-15 carbon atoms; n is an integer of 1 to 10; and X is at least one functional group selected from the group consisting of hydroxyl group, aldehyde group, carboxyl group, sulfo group, amino group, isocyanate group, carbodiimide group, oxazoline group, oxazine group, amide group, silanol group and silyl ether group.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: June 2, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Sadanori Kumazawa, Hiroyuki Ohme, Yuki Amano, Takamasa Owaki
  • Publication number: 20150045530
    Abstract: A catalyst solution for polyester production includes a titanium compound (A) and an organic solvent (B), wherein particle diameter of particles included in the solution, which is measured by dynamic light scattering method and is subsequently determined by cumulant analysis method, is not greater than 200 nm.
    Type: Application
    Filed: May 15, 2012
    Publication date: February 12, 2015
    Applicant: Toray Industries, Inc.
    Inventors: Masataka Makino, Yusuke Tojo, Sadanori Kumazawa
  • Publication number: 20140296471
    Abstract: A diol composition includes a diol as a major component and has an electrical conductivity of 0.6 to 30 mS/m.
    Type: Application
    Filed: February 21, 2012
    Publication date: October 2, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Masateru Ito, Izumi Morita, Kenji Kawamura, Tetsuya Yamada, Sadanori Kumazawa, Katsushige Yamada
  • Patent number: 8829099
    Abstract: A resin composition comprising a polylactic acid-based resin (A) and methacrylic resins (B), wherein the methacrylic resins having at least (a) a difference of 10° C. or more in glass transition temperature or (b) a difference of 3% or more in syndiotacticity; it is preferred that at least one of the methacrylic resins (B) is a methacrylic resin having a weight average molecular weight of 50,000 to 450,000, a glass transition temperature of 110° C. or higher and a syndiotacticity of 40% or more, and that the resin composition further contains a multilayer structure polymer formed as particles each consisting of a core layer and one or more shell layers covering it (C). A molded article made of said resin composition.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: September 9, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Sadanori Kumazawa, Yuki Amano, Hiroyuki Ohme
  • Publication number: 20140206807
    Abstract: A polylactic acid resin composition includes 0.15 to 0.90 parts by weight of an organic nucleating agent (B) in addition to 100 parts by weight of a polylactic acid resin (A) comprised of a poly-L-lactic acid component and a poly-D-lactic acid component. The polylactic acid resin composition satisfies (i) to (v): (i) amount of a linear oligomer of L-lactic acid and/or D-lactic acid is equal to or less than 0.3 parts by weight; (ii) rate of weight-average molecular weight retention is equal to or greater than 70% after the polylactic acid resin composition is retained in a closed state at 220° C. for 30 minutes; (iii) degree of stereocomplexation (Sc) exceeds 80%; (iv) stereocomplex crystal melting heat quantity ?Hmsc is equal to or greater than 30 J/g; and (v) cooling crystallization heat quantity (?Hc) is equal to or greater than 20 J/g.
    Type: Application
    Filed: August 24, 2012
    Publication date: July 24, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Ken Sudo, Yoshitake Takahashi, Sadanori Kumazawa
  • Publication number: 20140155534
    Abstract: A resin composition comprising a polylactic acid-based resin (A) and methacrylic resins (B), wherein the methacrylic resins having at least (a) a difference of 10° C. or more in glass transition temperature or (b) a difference of 3% or more in syndiotacticity; it is preferred that at least one of the methacrylic resins (B) is a methacrylic resin having a weight average molecular weight of 50,000 to 450,000, a glass transition temperature of 110° C. or higher and a syndiotacticity of 40% or more, and that the resin composition further contains a multilayer structure polymer formed as particles each consisting of a core layer and one or more shell layers covering it (C). A molded article made of said resin composition.
    Type: Application
    Filed: February 6, 2014
    Publication date: June 5, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Sadanori KUMAZAWA, Yuki AMANO, Hiroyuki OHME
  • Publication number: 20140155528
    Abstract: A thermoplastic resin composition includes 100 parts by weight of a thermoplastic resin including a polylactic acid resin (A); 10 to 50 parts by weight of a flame retardant (B); and 1 to 20 parts by weight of low melting point glass powder (C) having a median diameter (D50) in particle size distribution measurement of not greater than 6 ?m and a softening temperature of not higher than 600° C.
    Type: Application
    Filed: June 20, 2012
    Publication date: June 5, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Yosuke Onoue, Daisuke Sato, Sadanori Kumazawa
  • Publication number: 20140142276
    Abstract: The present invention is directed to a method for producing a polylactic acid resin, including the step of subjecting a crystallized prepolymer, which is a prepolymer including a lactic acid unit as a main component, and has an optical purity (Ea) of 60 to 94%, a weight average molecular weight of 5,000 to 100,000, and a crystal melting enthalpy (?Hma) of 4 to 50 J/g, to solid phase polymerization. According to the present invention, it is possible to obtain a polylactic acid resin which is excellent in moldability upon melt processing and drawdown resistance upon melt processing, and is also excellent in hydrolysis resistance.
    Type: Application
    Filed: July 18, 2012
    Publication date: May 22, 2014
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Tsuyoshi Tanaka, Sadanori Kumazawa, Hiroyuki Ome
  • Patent number: 8709591
    Abstract: A resin composition includes a biodegradable resin (A), a polyolefin resin (B) and a dispersing agent (C), which has a sea-isle structure in which the biodegradable resin (A) is dispersed as isles in the polyolefin resin (B) existing as a sea component wherein the average dispersed particle size of the biodegradable resin (A) is 1 nm to 1000 nm.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: April 29, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Saori Sumi, Kazuyoshi Nishikawa, Masahiro Kimura, Sadanori Kumazawa
  • Patent number: 8664334
    Abstract: A resin composition is described that is excellent in strength, impact resistance, heat resistance and moldability, while further allowing for a reduction in the amount of CO2 needed for its production. The resin composition includes a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), wherein the compatibilizer is preferably at least one species selected from: (C-1) a methyl methacrylate polymer; (C-2) a vinyl-based polymer to which an epoxy unit or acid anhydride unit is copolymerized; (C-3) a graft polymer in which a methyl methacrylate unit is grafted to a rubbery polymer; and (C-4) a block copolymer having a polylactide segment and a vinyl-based polymer segment.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: March 4, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Sadanori Kumazawa, Akiyoshi Tamai, Hiroyuki Ohme, Sadayuki Kobayashi
  • Patent number: 8575246
    Abstract: A flame-retardant thermoplastic resin composition that has a largely decreased corrosiveness to metals while maintaining a high degree of flame retardancy is provided, which is produced by adding a phosphinic acid salt and a compound having a specific structure to a thermoplastic resin, and molded articles with largely decreased corrosiveness to metals are also provided, so that useful molded articles can be provided as materials for mechanical machine parts, electric/electronic components, and automotive parts. The flame-retardant thermoplastic resin composition includes 65 to 99 wt % of (A) a thermoplastic resin, 1 to 35 wt % of (B) at least one phosphinic acid salt selected from the group of phosphinic acid salt, diphosphinic acid salt, polymer of phosphinic acid salts, and polymer of diphosphinic acid salts, and 0.001 to 0.70 wt % of (C) a compound having a specific, and molded articles produced therefrom.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: November 5, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Hiromitsu Ishii, Kentaro Togawa, Sadanori Kumazawa
  • Patent number: 8440748
    Abstract: Provided is a thermoplastic resin composition comprising 1 to 100 parts by weight of a flame retardant (B) containing any one or more flame retardants (B-1) selected from melamine phosphate, melamine pyrophosphate, and melamine polyphosphate and any one or more flame retardants (B-2) selected from piperazine phosphate, piperazine pyrophosphate, and piperazine polyphosphate, based on 100 parts by weight of a thermoplastic resin (A) comprising polylactide resin, wherein, according to transmission electronic microscopy, the major axis of the largest particle of the flame retardant (B) in the composition is not more than 10 ?m, and the ratio of the number of particles of the flame retardant (B) having a major axis of not more than 3 ?m relative to the number of particles of the flame retardant (B) per an area of 1,000 ?m2 is 70% or more.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: May 14, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Daisuke Sato, Yosuke Onoue, Sadanori Kumazawa
  • Publication number: 20120329920
    Abstract: Provided is a thermoplastic resin composition comprising 1 to 100 parts by weight of a flame retardant (B) containing any one or more flame retardants (B-1) selected from melamine phosphate, melamine pyrophosphate, and melamine polyphosphate and any one or more flame retardants (B-2) selected from piperazine phosphate, piperazine pyrophosphate, and piperazine polyphosphate, based on 100 parts by weight of a thermoplastic resin (A) comprising polylactide resin, wherein, according to transmission electronic microscopy, the major axis of the largest particle of the flame retardant (B) in the composition is not more than 10 ?m, and the ratio of the number of particles of the flame retardant (B) having a major axis of not more than 3 ?m relative to the number of particles of the flame retardant (B) per an area of 1,000 ?m2 is 70% or more.
    Type: Application
    Filed: September 13, 2011
    Publication date: December 27, 2012
    Applicant: Toray Industries, Inc.
    Inventors: Daisuke Sato, Yosuke Onoue, Sadanori Kumazawa
  • Publication number: 20120149837
    Abstract: A thermoplastic resin composition obtained by mixing 100 parts by weight of at least one thermoplastic resin (A) with 0.1 to 4 parts by weight of (B) a polyfunctional compound having three or more functional groups in which at least one of the terminal structures haying the functional groups is a structure represented by formula (1): where R is an alkylene group with 1-15 carbon atoms; n is an integer of 1 to 10; and X is at least one functional group selected from the group consisting of hydroxyl group, aldehyde group, carboxyl group, sulfo group, amino group, isocyanate group, carbodiimide group, oxazoline group, oxazine group, amide group, silanol group and silyl ether group.
    Type: Application
    Filed: January 27, 2012
    Publication date: June 14, 2012
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Sadanori Kumazawa, Hiroyuki Ohme, Yuki Amano, Takamasa Owaki