Process for the preparation of a dispersion stabilizer and a dis

Details Process for the preparation of a dispersion stabilizer and a dis Process for the preparation of a dispersion stabilizer and a dis

1989-08-04

1992-03-03

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524700, 524755, C08K 506

Patent

active

050934112

ABSTRACT:
The invention provides a stabilizer for an aqueous dispersion of an acrylic polymer that is obtained by successive copolymerization in random order of a monomer mixture A consisting of particular amounts of styrene or methyl styrene, acrylic acid or methacrylic acid, and optionally another comonomer, and a monomer mixture B consisting of particular amounts of styrene or methyl styrene, a (cyclo)alkyl methacrylate having 1-12 carbon atoms in the (cyclo)alkyl group, and optionally another comonomer, in the presence of a particular amount of a polybutadiene having a number average molecular weight of 1500-10000, the carboxylic acid groups from the (meth)acrylic groups being at least partly ionized. The invention also pertains to an aqueous dispersion of an acrylic polymer thus stabilized.

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patent: 4639394 (1987-01-01), Das et al.
patent: 4857577 (1989-08-01), Buter

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