Reaction products of silicic acid esters and organic tin compounds

US4360654A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Wolfgang Hechtl · Burghausen, DE
• Arnold Garhammer · Simbach, DE

Key dates

• Filing date: Aug 25, 1981
• Grant date: Nov 23, 1982
• Expiry date: Aug 25, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/2224
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Hydroxyl terminated diorganopolysiloxanes may be crosslinked with a mixture containing (1) a product obtained from the reaction of (a) silicic acid esters with (b) an organic tin compound of the formula EQU R.sub.2 Sn(OCOR.sup.1).sub.2 (I), where R represents a butyl or an octyl radical and R.sup.1 represents a monovalent hydrocarbon radical having from 1 to 15 carbon atoms, in which at most one of the valences of the carbon atom that is bonded to the carboxyl group is saturated by a carbon atom other than that of the carboxyl group, and (2) an organic tin compound of the formula EQU R.sub.2 Sn(OCOR.sup.2).sub.2 (II), where R is the same as above and R.sup.2 represents a monovalent aliphatic hydrocarbon radical having from 3 to 15 carbon atoms, in which at least two of the valences of the carbon atom that is bonded to the carboxyl group are saturated by two carbon atoms other than that of the carboxyl group.