Easily prepared curable organo-silicon compounds with aliphatic unsaturated hydrocarbyl groups bound to silicon

摘要

Organosilicon compounds (I) containing aliphatic unsaturated hydrocarbyl groups, terminal groups of formula A-Y (II) and optionally bridging groups of formula Y-B-Y (III) are new; in which A = a group of formula R<1>aR3-aSiO(R<1>bR2-bSiO)mR2Si (IV), optionally containing siloxane units of formula RSiO3/2 (V); Y = a tri- to octa-valent hydrocarbon group with 7-30 carbon (C) atoms; R = monovalent, optionally substituted, aliphatic saturated or aromatic 1-18 C hydrocarbyl; R<1> = monovalent, optionally substituted, aliphatic unsaturated 2-18 C hydrocarbyl; a = 0, 1, 2 or 3; b = 0, 1 or 2; m = 0-500; B = a group of formula -SiR2OR2Si (VI), optionally containing siloxane units of formulae R<1>aR3-aSiO1/2 (VII), R<1>2-bSiO (VIII) and/or (V); such that the free valencies of Y in (II) and (III) are saturated by A and/or B groups, the B groups are linked to other Y groups and each molecule contains an average of > 2 R<1> groups. Also claimed are (a) organosilicon compounds (IA), which contain aliphatic unsaturated hydrocarbyl groups and have an average of > 2 R<1> groups/m Molecule, prepared by a specified method; and (b) curable compositions containing (I) or (IA).