Patents by Inventor Yohei KASHIWAME

Yohei KASHIWAME 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: 20210115234
    Abstract: Provided is a propylene polymer composition capable of implementing a molded article containing excellent impact resistance. Provided is a propylene polymer composition containing components (A) to (C), satisfying all of requirements (1) to (5), (A) a propylene polymer containing 90 wt % or more of a propylene structural unit; (B) an ethylene-?-olefin copolymer or hydrogenated conjugated diene polymer containing more than 10 wt % and 99 wt % or less of an ethylene structural unit; (C) a propylene block copolymer or graft copolymer containing a propylene polymer segment and an ethylene-?-olefin copolymer segment or a hydrogenated conjugated diene polymer segment; (1) an intrinsic viscosity being 0.5 dl/g or more; (2) CXIS having a number average molecular weight of 40,000 or more; (3) a ratio of the number average molecular weight of CXIS to a number average molecular weight of CXS being 0.
    Type: Application
    Filed: July 2, 2019
    Publication date: April 22, 2021
    Inventors: Kenichi SENO, Yohei KASHIWAME, Kazuya INOUE
  • Patent number: 10280125
    Abstract: A process for selectively producing 1-butene comprises contacting at least one antifouling agent with at least one aluminum alkyl compound to form at least one antifouling compound in a first step. The antifouling compound may comprise a structure comprising a central aluminum molecule bound to an R1 group, bound to an R2 group, and bound to an R3 group. The process further comprises feeding the antifouling compound, an additional amount of the aluminum alkyl compound, at least one titanate compound, and ethylene into a reactor to dimerize ethylene in a second step. The titanate compound is fed as a stream separated from the streams of the antifouling compound and the additional amount of the aluminum alkyl compound. The molar ratio of the sum of the aluminum alkyl compound to the titanate compound is equal to or higher than 1.5 and equal to or lower than 3.0.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: May 7, 2019
    Assignees: Sumitomo Chemical Company, Limited, Saudi Arabian Oil Company
    Inventors: Kenji Sogo, Sohel K. Shaikh, Zhonglin Zhang, Wei Xu, Yohei Kashiwame
  • Publication number: 20180327332
    Abstract: A process for selectively producing 1-butene comprises contacting at least one antifouling agent with at least one aluminum alkyl compound to form at least one antifouling compound in a first step. The antifouling compound may comprise a structure comprising a central aluminum molecule bound to an R1 group, bound to an R2 group, and bound to an R3 group. The process further comprises feeding the antifouling compound, an additional amount of the aluminum alkyl compound, at least one titanate compound, and ethylene into a reactor to dimerize ethylene in a second step. The titanate compound is fed as a stream separated from the streams of the antifouling compound and the additional amount of the aluminum alkyl compound. The molar ratio of the sum of the aluminum alkyl compound to the titanate compound is equal to or higher than 1.5 and equal to or lower than 3.
    Type: Application
    Filed: December 4, 2017
    Publication date: November 15, 2018
    Applicants: Sumitomo Chemical Company, Limited, Saudi Arabian Oil Company
    Inventors: Kenji Sogo, Sohel K. Shakh, Zhonglin Zhang, Yohei Kashiwame
  • Patent number: 10124326
    Abstract: A modified solid polyalkylaluminoxane is provided, which is capable of providing ?-olefin suppressing adhesion of any polymer produced as a by-product onto the reactor wall and the stirrer, and which is capable of providing a highly active olefin oligomerization reaction catalyst. An olefin oligomerization reaction catalyst containing the modified solid polyalkylaluminoxane is also provided. The modified solid polyalkylaluminoxane for olefin oligomerization reactions contains structural units represented by general formula (a) and structural units represented by general formula (b), whose median diameter is equal to or larger than 0.1 ?m and equal to or smaller than 50 ?m, in which R? in the general formula (a) represents an alkyl group having 1 to 20 carbon atoms, and R? in the general formula (b) represents a halogenated alkoxy group having 1 to 20 carbon atoms or a halogenated aryloxy group having 6 to 20 carbon atoms.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: November 13, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kenji Sogoh, Yohei Kashiwame, Takahiro Hino
  • Publication number: 20170225155
    Abstract: A modified solid polyalkylaluminoxane is provided, which is capable of providing ?-olefin suppressing adhesion of any polymer produced as a by-product onto the reactor wall and the stirrer, and which is capable of providing a highly active olefin oligomerization reaction catalyst. An olefin oligomerization reaction catalyst containing the modified solid polyalkylaluminoxane is also provided. The modified solid polyalkylaluminoxane for olefin oligomerization reactions contains structural units represented by general formula (a) and structural units represented by general formula (b), whose median diameter is equal to or larger than 0.1 ?m and equal to or smaller than 50 ?m, in which R? in the general formula (a) represents an alkyl group having 1 to 20 carbon atoms, and R? in the general formula (b) represents a halogenated alkoxy group having 1 to 20 carbon atoms or a halogenated aryloxy group having 6 to 20 carbon atoms.
    Type: Application
    Filed: September 24, 2015
    Publication date: August 10, 2017
    Inventors: Kenji SOGOH, Yohei KASHIWAME, Takahiro HINO