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Block polymer, thermoplastic addition polymer, and their production process and use

  • US 5,679,762 A
  • Filed: 08/18/1995
  • Issued: 10/21/1997
  • Est. Priority Date: 12/24/1993
  • Status: Expired due to Fees
First Claim
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1. A star-shaped block polymer, which comprises:

  • a polyvalent mercaptan segment andat least three polymer segments which are radially extended from the polyvalent mercaptan segment and have two or more different compositions, each of said polymer segments having a number-average molecular weight of 2000 to 200,000 ;

    the block polymer having a number-average molecular weight of 10,000 to 400,000.

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