Vinyl aromatic/conjugated diene block copolymers deactivated to

Details Vinyl aromatic/conjugated diene block copolymers deactivated to Vinyl aromatic/conjugated diene block copolymers deactivated to

1998-11-10

2000-11-21

Sellers, Robert E. L.

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

Synthetic resins

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

525250, 525285, 525366, 525385, 525386, C08F 408, C08F29704

Patent

active

061504637

ABSTRACT:
The present invention related to a process for the treatment of vinyl aromatic/conjugated diene block copolymers. More particularly, the present invention relates to a process for the treatment of such copolymers obtained starting from a (co)polymerization-initiating stage performed by means of alkaline based catalysts (Me), deactivated in such a way that they show a termination of the alkali metal-alcoholate type (--O--Me), and treated with a cyclic anhydride of polycarboxylic acid, and optically a C.sub.2 -C.sub.4 monocarboxylic acid.

REFERENCES:
patent: 4835220 (1989-05-01), Bronstert et al.

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