Cross-linkable organopolysiloxane materials formed into elastomers by separating alcohols

US6284860A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Oswin Sommer · Burghausen, DE
• Wolfgang Hechtl · Burghausen, DE
• Stefan Oberneder · Burghausen, DE
• Norman Dorsch · Burghausen, DE
• Rudolf Heinrich · Emmerting, DE

Key dates

• Filing date: Jan 20, 2000
• Grant date: Sep 4, 2001
• Expiry date: Jan 20, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2200/0247
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention pertains to the preparation of organopolysiloxanes containing organyloxy groups by reacting organopolysiloxane(s) bearing terminal hydroxyl groups with an alkoxysilane having at least two alkoxy groups and a radical which contains at least one secondary or tertiary amino group bonded to silicon by a divalent C.sub.1-2 hydrocarbon radical, the reaction being catalyzed by an acidic ester of phosphoric acid having the formula EQU (HO).sub.a OP--(O--R.sup.7).sub.3-a Where R.sup.7 is an oxyalkylated active hydrogen component, preferably an oxyalkylated fatty alcohol. RTV-1 compositions containing the reaction product exhibit extended storage life.