Patent ID: 6143817
Filing Date: 2000-11-07
Classification: C08F

Abstract:
A stabilized aqueous emulsion polymerization composition comprising:(a) from about 10% to about 80% by weight of a polymer derived from an emulsion polymerizable ethylenically unsaturated monomer;(b) from about 0.1% to about 10% by weight of a polyamino acid heteropolymer;(c) from about 0.01% to about 1% by weight of a free radical polymerization initiating agent; and(d) the remainder being water;wherein the polyamino acid heteropolymer in (b) may be selected from the group consisting of polyaspartic acid heteropolymers represented by Formula (1); ##STR11## polyglutamic acid heteropolymers represented by Formula (2); ##STR12## and copolymers of the polyaspartic acid heteropolymers represented by Formula (1) with the polyglutamic acid heteropolymers represented by Formula (2), and mixtures thereof;wherein(i) R.sub.1 is selected from the group consisting of branched and unbranched alkyl, alkylaryl, and alkenyl groups having from 4 to 30 carbon atoms, and alkyl terminated polymers of ethylene oxide, propylene oxide, and butylene oxide having a molecular weight in the range from about 200 to about 3000;(ii) R.sub.2 is selected from the group consisting of hydrogen and branched and unbranched alkyl and alkenyl groups having from 1 to 4 carbon atoms;(iii) M.sup.+ is a cation;(iv) residues n.sub.1, n.sub.2, n.sub.3, and n.sub.4 are present in random order, and the ratio of (n.sub.1 +n.sub.3):(n.sub.2 +n.sub.4) is from about 1:99 to about 1:1; and(v) the molecular weight of the polyamino acid heteropolymer is from about 1,000 to about 100,000.