Patent ID: 6103821
Filing Date: 2000-08-15
Classification: C08F

Abstract:
A method of forming a cross-linked particulate emulsion polymer having a glass transition temperature below 0.degree. C. and a mean particle size (weight average) of from 50 to 1000 nm which comprises polymerizing the monomers producing the emulsion polymer in the presence of a crosslinking agent of the formula (I):H--(--CH.sub.2 --CR.sup.1 R.sup.2).sub.m (--CH.sub.2 --CR.sup.1 R.sub.3).sub.n --H (I)whereR.sup.1 is H or methyl,R.sup.2 is --C(O)--Y--R.sup.4, where R.sup.4 is H, methyl, ethyl or allyl,R.sup.3 is --C(O)--Y-ally andY is O or NHorR.sup.1 is H or C.sub.1 -C.sub.20 -alkyl,R.sup.2 is H andR.sup.3 is (--CH.sub.2 --CR.sup.5 .dbd.CR.sup.6 --CH.sub.2).sub.p --H, where R.sup.5 and R.sup.6 independently are each H, methyl, ethyl or chlorine and p is 1-100,orR.sup.1 is H,R.sup.2 is OH or O-allyl andR.sup.3 is O-allyl,orR.sup.1 is H,R.sup.2 is OH or R.sup.3 andR.sup.3 is (meth)acrylate, --O--C(O)--CH.dbd.CH--COOH or --O--C(O)--CH.sub.2 --C(.dbd.CH.sub.2)--COOH,and m is an integer from 5 to 500,000 and n is an integer from 2 to 100,000, and the ratio n:m being from 1:50 to 10:1.