Process for the manufacture of non-reverting elastomeric organopolysiloxanes
US4166053A · kind A · utility
4Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Aug 28, 1979 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heat-resistant, polyorganosiloxane elastomers are prepared by reacting a linear, difunctional polyorganosiloxane with a silicon-containing crosslinking agent and a stannous salt of a monoethylenically unsaturated monohydroxy monocarboxylic acid as the curing catalyst. A filler can optionally be included in the formulation. The present catalysts are unique in that they impart a relatively long working life to the uncured composition yet do not catalyze the depolymerization reaction at elevated temperatures as do conventional organotin catalysts such as dibutyltin dilaurate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.