Patents by Inventor Kazunari Matsumura

Kazunari Matsumura 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).

  • Publication number: 20230250237
    Abstract: A polyorganosiloxane may be high in elasticity and/or strength. The polyorganosiloxane may include an M unit (R1R2R3SiO1/2) at a content of 10 mol. % or more relative to the total of silicon and a T unit (R6SiO3/2) at a content of 80 mol. % or less relative to the total of silicon. The polyorganosiloxane may have an alkoxy group bound, at a content of 0.07 to 4 wt. %, based on total polyorganosiloxane weight, and a reactive functional group bound to silicon, with 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane. The weight loss of the polyorganosiloxane at 110° C. under 0.15 torr for 2 hours may be 5 wt. % or less.
    Type: Application
    Filed: February 8, 2023
    Publication date: August 10, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Takumi WATANABE, Noriaki TERADA, Tsuyoshi NAGASAKA, Shogo KOGA, Kazuma INOUE, Kazunari MATSUMURA, Naomi FUJIMORI, Hiroo MIYAUCHI, Akemi HOSOKAWA
  • Patent number: 11608415
    Abstract: Provided are a polyorganosiloxane high in elasticity, high in strength and the like. The polyorganosiloxane is a polyorganosiloxane including an M unit (R1R2R3SiO1/2) at a content of 10% by mol or more relative to the total of silicon and a T unit (R6SiO3/2) at a content of 80% by mol or less relative to the total of silicon, the polyorganosiloxane having an alkoxy group bound and a reactive functional group bound to silicon, wherein the polyorganosiloxane has the alkoxy group bound at a content of 0.07 to 4% by weight based on the total weight of the polyorganosiloxane and has 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane, and the weight loss of the polyorganosiloxane in heating at 110° C. under a reduced pressure of 0.15 torr for 2 hours is 5% by weight or less.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: March 21, 2023
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Takumi Watanabe, Noriaki Terada, Tsuyoshi Nagasaka, Shogo Koga, Kazuma Inoue, Kazunari Matsumura, Naomi Fujimori, Hiroo Miyauchi, Akemi Hosokawa
  • Publication number: 20230063756
    Abstract: A polymer composition, in which a differential distribution value in a differential molecular weight distribution curve of the polymer composition, as measured by gel permeation chromatography, satisfies Equation 1 and a maximum value of a normalized back-scattering intensity of a 35 wt % base oil solution of the polymer composition, where a size q of a scattering vector of small-angle X-ray scattering at 25° C. is in a range of 0.07 nm?1 or more and 2 nm?1 or less, is 40 cm?1 or more.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 2, 2023
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hiroki Fukuta, Katsufumi Mochizuki, Fumiko Fujie, Takahiro Mukuda, Hiroshi Niino, Eiko Okamoto, Kazunari Matsumura, Hiroko Shinada, Hiroki Hamamoto
  • Publication number: 20190292320
    Abstract: Provided are a polyorganosiloxane high in elasticity, high in strength and the like. The polyorganosiloxane is a polyorganosiloxane including an M unit (R1R2R3SiO1/2) at a content of 10% by mol or more relative to the total of silicon and a T unit (R6SiO3/2) at a content of 80% by mol or less relative to the total of silicon, the polyorganosiloxane having an alkoxy group bound and a reactive functional group bound to silicon, wherein the polyorganosiloxane has the alkoxy group bound at a content of 0.07 to 4% by weight based on the total weight of the polyorganosiloxane and has 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane, and the weight loss of the polyorganosiloxane in heating at 110° C. under a reduced pressure of 0.15 torr for 2 hours is 5% by weight or less.
    Type: Application
    Filed: June 13, 2019
    Publication date: September 26, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Takumi WATANABE, Noriaki TERADA, Tsuyoshi NAGASAKA, Shogo KOGA, Kazuma INOUE, Kazunari MATSUMURA, Naomi FUJIMORI, Hiroo MIYAUCHI, Akemi HOSOKAWA
  • Patent number: 9487682
    Abstract: This curable resin composition comprises (A) a polymerizable (meth)acrylic-based monomer, (B) a thiourea compound component, and (C) a peroxide component having a structure of formula (1), and may have (D) a (meth) acrylic-based polymer component as an optional component. (In formula (1), R is a C1-15 hydrocarbon group.) In the curable resin composition, preferably, the content of the (A) component is 5-100 mass % and the content of the (D) component is 0-95 mass % relative to the total mass of the (A) component and the (D) component.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: November 8, 2016
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventor: Kazunari Matsumura
  • Publication number: 20140120358
    Abstract: This curable resin composition comprises (A) a polymerizable (meth)acrylic-based monomer, (B) a thiourea compound component, and (C) a peroxide component having a structure of formula (1), and may have (D) a (meth) acrylic-based polymer component as an optional component. (In formula (1), R is a C1-15 hydrocarbon group.) In the curable resin composition, preferably, the content of the (A) component is 5-100 mass % and the content of the (D) component is 0-95 mass % relative to the total mass of the (A) component and the (D) component.
    Type: Application
    Filed: April 5, 2012
    Publication date: May 1, 2014
    Applicant: MITSUBISHI RAYON CO., LTD.
    Inventor: Kazunari Matsumura