Process for decolorizing of polymers of the vinylaromatic-conjug

Details Process for decolorizing of polymers of the vinylaromatic-conjug Process for decolorizing of polymers of the vinylaromatic-conjug

1988-09-20

1989-10-31

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

524575, 526173, 526340, C08F 608, C08F 606

Patent

active

048778630

ABSTRACT:
Vinyl aromatic-conjugated diene copolymers having polymer chains which end with an alkali metal and which are obtained by the polymerization in solution of at least one vinyl aromatic hydrocarbon and of a conjugated diene in the presence of a catalyst based on an alkali metal are decolorized by treating the copolymer with a monocarboxylic acid of general formula

REFERENCES:
patent: 2893982 (1959-07-01), Campbell
patent: 3639517 (1972-02-01), Kitchen et al.
patent: 3998797 (1976-12-01), Brandli et al.
patent: 4091053 (1978-05-01), Kitchen

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