Preparation method of vinyl aromatic hydrocarbon-conjugated diene block copolymer using coupling reaction with improved ion stability

Preparation method of vinyl aromatic hydrocarbon-conjugated diene block copolymer using coupling reaction with improved ion stability

  • CN 102,597,032 A
  • Filed: 11/10/2010
  • Published: 07/18/2012
  • Est. Priority Date: 11/10/2009
  • Status: Active Application
First Claim
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1. the preparation method of a vinylaromatic hydrocarbon-conjugated diene block copolymer, it comprises:

  • In hydrocarbon solvent, make the vinyl aromatic hydrocarbon monomer polymerization, thereby form the step (a) of first mixing solutions that comprises the vinylaromatic hydrocarbon block through the organolithium compound polymerization starter;

    AndConjugate diene monomer is added in first mixing solutions of step (a), and in the terminal conjugated diene block that forms of vinylaromatic hydrocarbon block, thereby formation comprises the step (b) of second mixing solutions of vinylaromatic hydrocarbon block-conjugated diene block;

    Wherein, the preparation method of this vinylaromatic hydrocarbon-conjugated diene block copolymer is characterised in that, comprises;

    Before the polymerization of the vinyl aromatic hydrocarbon monomer of step (a) causes, add Lewis acid in first mixing solutions step (c) when perhaps polymerization is accomplished in the polymerization.

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