Two-part room temperature vulcanizable systems
US3956209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Jul 5, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided by the present invention a twopart room temperature vulcanizable silicon rubber composition which is exceptionally stable to reversion and specifically to reversion of the cured composition caused by water comprising a silanol-stopped diorganopolysiloxane, filler, an alkyl silicate and a catalyst where the catalyst is a reaction product of an organic tin oxide compound with the hydrocarbon ester of an oxygen-containing acid having at least one oxygen atom in the acid radical attached to a replaceable acid hydrogen atom. The hydrocarbon ester can be either an inorganic acid or a carboxylic acid. The preferred catalyst in the present invention is the reaction product of dibutyl tin oxide and a phthalate ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.