Patents Assigned to Takashi Sawaguchi
  • Polyesterified block copolymer and process for producing the same
    Patent number: 7452939
    Abstract: A polyesterified block copolymer represented by the general formula (1), (2) or (3) (for example, polyolefin/polyolefin block copolymer of the following general formula (1)), obtained by an esterification reaction between a terminal maleated polymer and a terminal hydroxylated polymer. Also, a process for producing the same is provided. (1) wherein each of R1 and R2 represents hydrogen or methyl; m is an integer of 10 to 200; n is an integer 10 to 200; k is an integer 5 of to 3000.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: November 18, 2008
    Assignees: San-Ei Kougyou Corporation, Takashi Sawaguchi
    Inventor: Takashi Sawaguchi