Polymerizable silicic acid heteropolycondensates and their application

摘要: Polycondensates modified with unsaturated organic groups on the basis of rolytically condensable compounds silicon and optionally other elements from group B, Al, P, Sn, Pb, transition metals, lanthanides actinides, in which 5 to 100 mole %, based monomer compounds, fundamental hydrolytically are selected silanes general formula (I): {X.sub.a R.sub.b Si(R'(A.sub.c).sub.(4-a-b) }.sub.x B (I) indices have following meaning: X: hydrogen, halogen, hydroxy, alkoxyl acyloxy, alkyl carbonyl, alkoxycarbonyl or -NR" 2 ; R: alkyl, alkenyl, aryl, alkaryl, aralkyl; R': alkylene, arylene alkylene arylene; R": aryl; A: O, S, PR", POR", NHC(O)O NHC(O)NR"; B: straight chain branched group, is derived a compound B' at least one C═C double bond (for c=I A=NHC(O)O NHC(O)NR"), two bonds, 50 carbon atoms; a: 1, 3; b: 0, 1 2; c: 0 1; x: whole number, whose maximum value corresponds number bonds minus equal B', when c=1 A stands for NHC(O)NR".