Patents by Inventor Kenta Takemasu

Kenta Takemasu 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: 11773249
    Abstract: Provided is a thermoplastic resin composition and a molded article excellent in balance of color developability and low-temperature impact resistance, where a polyorganosiloxane-containing graft copolymer in which a rubber (A) containing a polyorganosiloxane (A1) and a vinyl polymer (A2) is grafted with a vinyl monomer (b), wherein the vinyl polymer (A2) includes 90 to 100% by mass of a monofunctional vinyl monomer (a1) and 10 to 0% by mass of a polyfunctional vinyl monomer (a2) with respect to 100% by mass of the vinyl polymer (A2), wherein the glass transition temperature of the homopolymer of the monofunctional vinyl monomer (a1) is 0° C. or higher, and the peak of tan ? of the polyorganosiloxane-containing graft copolymer is in the range of ?125° C. to ?90° C.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: October 3, 2023
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Ayaka Wakita, Shinji Matsuoka, Mitsufumi Nodono, Naotaka Suenaga
  • Patent number: 11548968
    Abstract: An object of the present invention is to provide a polyorganosiloxane-containing graft copolymer powder capable of providing a resin composition and a molded article which are excellent in balance between colorability and mechanical properties such as impact resistance. The polyorganosiloxane-containing graft copolymer powder according to the present invention is a graft copolymer powder obtained by graft-polymerizing a mixture (B) of a vinyl monomer (b1) having an epoxy group and another vinyl monomer (b2) to a rubber (A) containing a polyorganosiloxane, wherein the content of the polyorganosiloxane (A1) contained in the rubber (A) is 12 to 50% by mass, the mass average particle diameter of the polyorganosiloxane-containing graft copolymer powder is 300 to 2000 nm, and the epoxy equivalent of the polyorganosiloxane-containing graft copolymer powder is 2500 to 7800 g/eq.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: January 10, 2023
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Masahiro Ueda, Shinji Matsuoka, Hiroya Arai, Misaki Hagi, Masashi Iimori
  • Patent number: 11161974
    Abstract: Provided is a thermoplastic resin composition and a molded article excellent in balance of color developability and low-temperature impact resistance, where a polyorganosiloxane-containing graft copolymer in which a rubber (A) containing a polyorganosiloxane (A1) and a vinyl polymer (A2) is grafted with a vinyl monomer (b), wherein the vinyl polymer (A2) includes 90 to 100% by mass of a monofunctional vinyl monomer (a1) and 10 to 0% by mass of a polyfunctional vinyl monomer (a2) with respect to 100% by mass of the vinyl polymer (A2), wherein the glass transition temperature of the homopolymer of the monofunctional vinyl monomer (a1) is 0° C. or higher, and the peak of tan ? of the polyorganosiloxane-containing graft copolymer is in the range of ?125° C. to ?90° C.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: November 2, 2021
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Ayaka Wakita, Shinji Matsuoka, Mitsufumi Nodono, Naotaka Suenaga
  • Publication number: 20210102060
    Abstract: Provided is a thermoplastic resin composition and a molded article excellent in balance of color developability and low-temperature impact resistance, where a polyorganosiloxane-containing graft copolymer in which a rubber (A) containing a polyorganosiloxane (A1) and a vinyl polymer (A2) is grafted with a vinyl monomer (b), wherein the vinyl polymer (A2) includes 90 to 100% by mass of a monofunctional vinyl monomer (a1) and 10 to 0% by mass of a polyfunctional vinyl monomer (a2) with respect to 100% by mass of the vinyl polymer (A2), wherein the glass transition temperature of the homopolymer of the monofunctional vinyl monomer (a1) is 0° C. or higher, and the peak of tan ? of the polyorganosiloxane-containing graft copolymer is in the range of ?125° C. to ?90° C.
    Type: Application
    Filed: November 24, 2020
    Publication date: April 8, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Ayaka Wakita, Shinji Matsuoka, Mitsufumi Nodono, Naotaka Suenaga
  • Publication number: 20200385504
    Abstract: An object of the present invention is to provide a polyorganosiloxane-containing graft copolymer powder capable of providing a resin composition and a molded article which are excellent in balance between colorability and mechanical properties such as impact resistance. The polyorganosiloxane-containing graft copolymer powder according to the present invention is a graft copolymer powder obtained by graft-polymerizing a mixture (B) of a vinyl monomer (b1) having an epoxy group and another vinyl monomer (b2) to a rubber (A) containing a polyorganosiloxane, wherein the content of the polyorganosiloxane (A1) contained in the rubber (A) is 12 to 50% by mass, the mass average particle diameter of the polyorganosiloxane-containing graft copolymer powder is 300 to 2000 nm, and the epoxy equivalent of the polyorganosiloxane-containing graft copolymer powder is 2500 to 7800 g/eq.
    Type: Application
    Filed: August 24, 2020
    Publication date: December 10, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Masahiro Ueda, Shinji Matsuoka, Hiroya Arai, Misaki Hagi, Masashi Iimori
  • Publication number: 20200109277
    Abstract: Provided is a thermoplastic resin composition and a molded article excellent in balance of color developability and low-temperature impact resistance, where a polyorganosiloxane-containing graft copolymer in which a rubber (A) containing a polyorganosiloxane (A1) and a vinyl polymer (A2) is grafted with a vinyl monomer (b), wherein the vinyl polymer (A2) includes 90 to 100% by mass of a monofunctional vinyl monomer (a1) and 10 to 0% by mass of a polyfunctional vinyl monomer (a2) with respect to 100% by mass of the vinyl polymer (A2), wherein the glass transition temperature of the homopolymer of the monofunctional vinyl monomer (a1) is 0° C. or higher, and the peak of tan ? of the polyorganosiloxane-containing graft copolymer is in the range of ?125° C. to ?90° C.
    Type: Application
    Filed: December 5, 2019
    Publication date: April 9, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kenta Takemasu, Ayaka Wakita, Shinji Matsuoka, Mitsufumi Nodono, Naotaka Suenaga