Patent ID: 6153705
Filing Date: 2000-11-28
Classification: C08F

Abstract:
A process for preparing block polymers of general formula (I): ##STR17## wherein: Z.sup.1 =S or P,Z.sup.2 =O, S or P,R.sup.1 and R.sup.2, which are identical or different, represent:an alkyl, acyl, aryl, alkene or alkyne group (i),an saturated or unsaturated, carbon-containing or aromatic ring (ii),an saturated or unsaturated heterocycle (iii),V, V', W and W', which are identical or different, represent H, an alkyl group or a halogen,X, X', Y and Y', which are identical or different, represent H, a halogen, R.sup.3, OR.sup.3, O.sub.2 COR.sup.3, NHCOH, OH, NH.sub.2, NHR.sup.3, N(R.sup.3).sub.2, (R.sup.3).sub.2 N.sup.+ O.sup.-, NHCOR.sup.3, CO.sub.2 H, CO.sub.2 R.sup.3, CN, CONH.sub.2, CONHR.sup.3 or CONR.sup.3.sub.2 group, wherein R.sup.3 is alkyl, aryl, aralkyl, alkaryl, alkene or organo-silyl groups, optionally perfluorinated,a and b, which are identical or different, are equal to 0 or 1,m and n, which are identical or different, are greater than or equal to 1 and, when one or other is greater than 1, the individual repeat units are identical or different,said process comprising the step of bringing into contact with each other:an ethylenically unsaturated monomer of formula: CYY'(.dbd.CW--CW').sub.a .dbd.CH.sub.2,a precursor compound of general formula (II): ##STR18## and a radical polymerization initiator.