Novel block copolymers and method for making same

Novel block copolymers and method for making same

  • CN 1,643,016 B
  • Filed: 02/07/2003
  • Issued: 07/27/2011
  • Est. Priority Date: 02/07/2002
  • Status: Active Grant
First Claim
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1. segmented copolymer, it had at least one polymer blocks A and at least one polymer blocks B before hydrogenation, wherein:

  • A. each A block is the mono alkenyl arene homopolymer block independently, and each B block is the control distribution copolymer block of at least a conjugated diolefine and at least a mono alkenyl arene independently;

    B. the number-average molecular weight of each A block is 3,000 to 60,000, and the number-average molecular weight of each B block is 30,000 to 300,000;

    C. each B block comprises one or more zones of the stub area of contiguous A block and not contiguous A block, wherein the stub area of contiguous A block is rich in conjugated diene unit, the mono alkenyl arene unit is not rich in one or more zones of contiguous A block, and a 15-25% and the last 75-85% of block are considered to be rich in diene, and remaining part is considered to be rich in aromatic hydrocarbons;

    D. the total amount of mono alkenyl arene is 20wt% to 80wt% in the segmented copolymer;

    WithE. the weight percent of mono alkenyl arene is 10% to 75% in each B block;

    Wherein said segmented copolymer has general configuration A-B-A, (A-B) n, (A-B) n-A, (A-B-A) nX or (A-B) nX, wherein n is 2 to 30 integer, X is the coupling agent residue.

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