Organopolysilozane compositions crosslinkable with elimination of alcohols to give elastomer

US6254811A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Christian Finger · Markt Indersdorf, DE
• Norman Dorsch · Burghausen, DE
• Wolfgang Hechtl · Burghausen, DE
• Christian Baumgartner · Burghausen, DE
• Alfred Heinrich · Ach, AT

Key dates

• Filing date: Dec 1, 1999
• Grant date: Jul 3, 2001
• Expiry date: Dec 1, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Alkoxy RTV-1 compositions comprise the product of the reaction of PA1 (A) an HO-terminated organopolysiloxane, PA1 (B1) an alkoxysilane which has at least three alkoxy groups and/or its partial hydrolysates, and PA1 (B2) an alkoxysilane which has two alkoxy groups and/or its partial hydrolysates, in the presence of PA1 (C) an acid phosphoric ester of the general formula (I) EQU (HO).sub.a OP(--O--[(CR.sup.1.sub.2).sub.b --O].sub.c [(CR.sup.2.sub.2).sub.d ].sub.e --L--M).sub.(3-a) (I), where PA1 a is 1 or 2, PA1 R.sup.1 and R.sup.2 are a hydrogen radical, methyl radical or hydroxyl radical, PA1 b and d are 2 or 3, PA1 c is an integer from 2 to 15, PA1 e is 0 or 1 PA1 L comprises a radical --O--, --COO--, --OOC--, --CONR.sup.3 --, --NR.sup.4 CO-- or --CO--, PA1 R.sup.3 and R.sup.4 are a hydrogen radical or C.sub.1 -C.sub.10 -alkyl radical, and PA1 M is a monovalent, unsubstituted or hydroxyl-, fluorine-, chlorine-, bromine-, PA1 C.sub.1 -C.sub.10 -alkoxyalkyl- or cyano-substituted C.sub.1 -C.sub.20 -hydrocarbon radical, with the proviso that on any given carbon atom not more than one radical R.sup.1 and R.sup.2 may be a hydroxyl radical.