Oil-resistant, room temperature-curable organopolysiloxane composition
US4485206A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1983 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Oct 27, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a room temperature-curable organopolysiloxane composition comprising (a) a diorganopolysiloxane terminated at both molecular chain ends with silanolic hydroxy groups, (b) a methylpolysiloxane composed of monofunctional siloxy units Me.sub.3 SiO.sub.1/2 tetrafunctional siloxane units SiO.sub.2 in a specified molar ratio, (c) an organosilane or organopolysiloxane having at least three hydrolyzable groups bonded to the silicon atom(s) per molecule, (d) oxide, carbonate or hydroxycarbonate of zinc, and (e) a thiazole, thiuram or dithiocarbamate compound. The composition is curable by standing in air into a rubbery elastomer which is highly resistant against oils, e.g. engine oils and gear oils in automobiles, even at elevated temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.