Process for the preparation of novel organosilicon compounds

Claim 1

Process of making an organofunctional siloxane having bonded to silicon at least one monovalent group of the formula --CH.sub.2 CH(R°)CH.sub.3-m X.sub.m wherein R° is a monovalent hydrocarbon group, X is a hydrocarbonoxy group, a cyanohydrocarbonoxy group, an acyloxy group, a halogen atom, a hydroxy group, a cyano group or a group having the formula --OC(O)NR 2 wherein R is a monovalent nitrogen-free organic radical, a divalent hydrocarbon group when both R's are taken together or hydrogen and may be the same or different throughout the same group or molecule, when X is halogen, hydroxy, cyano or a group of the formula --OC(O)NR 2 , m is an integer of 1 and, when X is hydrocarbonoxy, cyanohydrocarbonoxy or acyloxy, m is 1 or 2, comprising subjecting a substituted allyl compound having the formula: CH.sub.2 ═ C(R°)CH.sub.3-m X.sub.m wherein X and m are as defined above and an organosiloxane having at least one silicon-bonded hydrogen to addition reaction conditions under which said silicon-bonded hydrogen and the silicon to which it is bonded become bonded respectively to the vicinal carbon atoms comprising the unsaturation of said substituted allyl compound, said organosiloxane and said substituted allyl compound having no groups that would interfere with said addition reaction and no groups, other than substituted allyl groups of said substituted allyl compound and silicon bonded hydrogen, that react under said addition reaction conditions, with the proviso that, when X is halogen, hydroxyl or cyano, the substituted allyl compound is added incrementally to said organosiloxane which is maintained at said addition reaction conditions.