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US 4,360,654 AGranted
Reaction products of silicic acid esters and organic tin compounds
AssigneeWacker Chemie AG
InventorsWolfgang Hechtl, Arnold Garhammer
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AssigneeWacker Chemie AG
InventorsWolfgang Hechtl, Arnold Garhammer
Estimating the term…
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 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 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.
An organopolysiloxane composition capable of forming an elastomer comprising a hydroxyl terminated diorganopolysiloxane and (1) a product obtained from the reaction of (a) silicic acid ester and an (b) an organic tin compound of the formula
A process for preparing an organopolysiloxane elastomer which comprises mixing with a hydroxyl terminated diorganopolysiloxane (1) a product obtained from the reaction of (a) silicic acid ester and (b) an organic tin compound of the formula
Dependencies are inferred from the claim text.