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Block copolymers and composition containing the same

  • US 4,987,194 A
  • Filed: 09/22/1989
  • Issued: 01/22/1991
  • Est. Priority Date: 10/07/1988
  • Status: Expired due to Term
First Claim
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1. A block copolymer having a number average molecular weight of 30,000 to 300,000 composed of at least two blocks consisting of aromatic vinyl units each having a number average molecular weight of 2,500 to 40,000 and at least one block containing a vinyl bond content of not less than 40%, having a peak temperature of primary dispersion of tan δ

  • of at least 0°

    C., and consisting of isoprene or isoprene-butadiene units in which at least a portion of the carbon-carbon double bonds may be hydrogenated.

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