Process for the preparation of a block copolymer blend

Details Process for the preparation of a block copolymer blend Process for the preparation of a block copolymer blend

1994-03-09

1995-04-11

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525314, C08L 5302, C08F29704

Patent

active

054059038

ABSTRACT:
A process is provided for preparing block copolymer blend compositions, which process comprises the subsequent steps of polymerizing vinyl aromatic monomer, adding conjugated diene monomer to the polymerization mixture, adding more initiator, adding of a second portion of conjugated diene monomer, adding a second portion of vinyl aromatic monomer, and adding a terminating agent. A block copolymer composition is provided having a blend of a triblock copolymer A-B-B'-A' and a diblock copolymer B'-A'.

REFERENCES:
patent: 4096203 (1978-06-01), St. Clair
patent: 4335221 (1982-06-01), Gerberding
patent: 4391949 (1983-07-01), St. Clair
patent: 4704434 (1987-11-01), Kitchen et al.
patent: 5130377 (1992-07-01), Trepka et al.
patent: 5256736 (1993-10-01), Trepka et al.
patent: 5284915 (1994-02-01), Custro et al.

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