Patent ID: 7122692

Claim:
Process for the preparation of organosilylated carboxylate monomers of general formula (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 each independently represent an alkyl, an aryl group or an hydrogen atom, R 6 represents a hydrogen atom or a methyl group or —CH 2 —COO—(SiR 4 R 5 O)n-SiR 1 R 2 R 3 wherein R 1 , R 2 , R 3 , R 4 , R 5 are as already defined, R 7 represents a hydrogen atom, an alkyl group or —COOR 9 wherein R 9 represents an alkyl group, n represents a number of dihydrocarbylsiloxane units from 0 to 200, which process comprises the steps of reacting: an acyloxysilane of formula (II) wherein R 1 , R 2 , R 3 , R 4 and R 5 are as already defined above and, R 8 is a hydrogen atom, a C 1 –C 3 alkyl group or a partially or totally hydrogenated C 1 –C 3 alkyl group, n represents the same number of dihydrocarbylsiloxane units as those defined above in formula (I), with an unsaturated carboxylic acid of formula (III), wherein R 6 is a hydrogen atom or a methyl group or CH 2 COOH and, R 7 has the same meaning as that defined above.