Tinorganic catalyst with increased crosslinking speed for silane crosslinking reactions

US5891979A · kind A · utility

Assignee

• Borealis A/S · DK

Inventors

• Ruth Dammert · Stenungsund, SE
• Bernt-Ake Sultan · Lund, SE

Key dates

• Filing date: Jul 30, 1996
• Grant date: Apr 6, 1999
• Expiry date: Jul 30, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/57
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A cross-linkable polymer composition contains a cross-linkable polymer with hydrolysable silane groups and at least one silanol condensation catalyst. The polymer composition is distinguished by the silanol condensation catalyst being a tinorganic compound of formula (I); RSn(OH).sub.k X.sub.1 OSn(OH).sub.m X.sub.n R', wherein R and R' are hydrocarbon radicals, R' being the same as or different from R, X is a halogen, h is 1 or 2, j is 1 or 2, h+j=3, k, l, m and n are 1 or 2, k+1=2, m+n=2 and at least one of 1 and n is different from 0. Preferably, the composition contains 0.0001-3% by weight of the silanol condensation catalyst.