Silanes, process for their preparation and their application to prepare polymers and polycondensates

Abstract

Silanes of the general formula (I): {(X.sub.a R.sub.b Si(R'(A).sub.c).sub.(4-a-b) }.sub.x B (I) in which the groups and indices have the following meaning: X: hydrogen, halogen, hydroxy, alkoxy, acyloxy, alkyl carbonyl, alkoxycaryl or --NR".sub.2 ; R: alkyl, alkenyl, aryl, alkaryl, or aralkyl; R': alkylene, arylene or alkylene arylene; R": hydrogen, alkyl or aryl; A: O, S, PR", POR", NHC(O)O or NHC(O)NR"; B: straight chain or branched organic group, which is derived from a B' compound with at least one C.dbd.C double bond for c=1 and A=NHC(O)O or NHC(O)NR") or at least two C.dbd.C double bonds, and 5 to 50 carbon atoms; a: 1, 2 or 3; b: 0, 1 or 2; c: 0 or 1; x: whole number, whose maximum value corresponds to the number of double bonds in compound B' minus 1, or is equal to the number of double bonds in compound B', when c=1 and A stands for NHC(O)O or NHC(O)NR"; are suitable to prepare homo and copolycondensates and homo or copolymers according to the sol-gel method or by photochemical or thermal polymerization.

Dependencies are inferred from the claim text.