Patents by Inventor Michiko Kawabata

Michiko Kawabata 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).

  • Method for producing modified polymer
    Patent number: 8557926
    Abstract: A modified polymer is produced by reacting (A) a polymer with (B) a compound having a nitroxide free radical in the molecule stable at room temperature and in the presence of oxygen, (C) an organic peroxide, and (D) a radically polymerizable monomer having a functional group in the presence of (E) an amine compound comprising a monoamine compound represented by the general formula: NR1R2R3 (R1: C1-C20 alkyl group or aryl group; R2 and R3: H, C1-C20 alkyl group, or aryl group) or a polyamine compound represented by the general formula: (R4)2N(R5N)nR6N(R4)2 (R4: H or C1-C6 alkyl group; R5 and R6: C1-C6 alkylene group; n: 0 to 20). This method can not only reduce the reaction temperature but also improve the modification rate.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: October 15, 2013
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Tetsuji Kawazura, Michiko Kawabata
  • METHOD FOR PRODUCING MODIFIED POLYMER
    Publication number: 20130053517
    Abstract: A modified polymer is produced by reacting (A) a polymer with (B) a compound having a nitroxide free radical in the molecule stable at room temperature and in the presence of oxygen, (C) an organic peroxide, and (D) a radically polymerizable monomer having a functional group in the presence of (E) an amine compound comprising a monoamine compound represented by the general formula: NR1R2R3 (R1: C1-C20 alkyl group or aryl group; R2 and R3: H, C1-C20 alkyl group, or aryl group) or a polyamine compound represented by the general formula: (R4)2N(R5N)nR6N(R4)2 (R4: H or C1-C6 alkyl group; R5 and R6: C1-C6 alkylene group; n: 0 to 20). This method can not only reduce the reaction temperature but also improve the modification rate.
    Type: Application
    Filed: April 13, 2011
    Publication date: February 28, 2013
    Applicant: YOKOHAMA RUBBER CO., LTD.
    Inventors: Tetsuji Kawazura, Michiko Kawabata