Patent ID: 6656999
Filing Date: 2003-12-02
Classification: C08C

Abstract:
A method of preparing a butadiene rubber latex having a large particle size, showing good stability and reducing coagulum during polymerization, which comprises:(a) pretreating a seed butadiene rubber latex by mixing the seed butadiene rubber latex with deionized water and a small amount of an emulsifier and stirring; (b) preparing an agglomerating latex with a pH value of about 5.0Ëœ8.0 by mixing a copolymer latex containing unsaturated carboxylic acid having from about 10 to about 50% by weight of solid content with deionized water and a pH controlling agent; and (c) adding the pretreated seed butadiene rubber latex of step (a) to the agglomerating latex of step (b).