Patent ID: 7074875

Claim:
A process for preparing a polydiorganosiloxane (A) having the formula comprising reacting a polydiorganosiloxane of the formula (4) with a silazane of the general formula (5), and with a silane of the formula (6) OCNâ€”Xâ€”SiR 1 a (OR 2 ) 3-a (6), where R 0 is a monovalent C 1 â€“C 20 -hydrocarbon radical unsubstituted or substituted by fluorine, chlorine, bromine, C 1 â€“C 4 -alkoxyalkyl, or cyano groups, R 1 ,R 2 are a monovalent C 1 â€“C 6 -alkyl radical unsubstituted or substituted by fluorine, chlorine bromine, or cyano groups, R 3 is hydrogen or an acyl radical or a monovalent C 1 â€“C 20 -hydrocarbon radical unsubstituted or substituted by fluorine, chlorine, bromine, C 1 â€“C 4 -alkoxyalkyl, or cyano groups, X is an alkylene group unsubstituted or substituted by fluorine, chlorine, bromine, C 1 â€“C 4 -alkoxyalkyl, or cyano groups, and having from 1 to 10 carbon atoms, which may be interrupted by ether groups, by ester groups, or by amine groups, a is 0, 1, or 2, b is a whole-number from 3 to 15, and n is a whole-number from 10 to 10 4 .