Patent ID: 11879059
Assignee: INEOS STYROLUTION GROUP GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 16:
17. A process for the preparation of block copolymer A2 according to claim 16 characterized by:
a) a double initiation,
b) a coupling step after the addition and polymerization of a diene and optionally a vinylaromatic monomer used for the preparation of homo- or copolymer block (B/S)B, and
c) the second initiation process placed before the addition and polymerization of the vinylaromatic monomer used for the preparation blocks Si and Se, wherein the molar ratio of the first and the second initiation is from 0.9:1 to 1.5:1.