Patent ID: 6780918
Filing Date: 2004-08-24
Classification: C08F

Abstract:
A process for the preparation of a protective colloid-stabilized, emulsifier-free, aqueous dispersion of a copolymer, comprising:polymerizing in water at least two monomers selected from the group consisting of vinylaromatics and 1,3-dienes, at least one protective colloid, and other auxiliaries, wherein 0.01 to 0.4% by weight of an oil-soluble regulator is added to the polymerization at a conversion of 60 to 80%, based on 100% of the monomers, and an additional 0.01 to 0.4% by weight of an oil-soluble regulator is added to the polymerization at a conversion of 80% to 95%, based on 100% of the monomers.