Process for the preparation of silane polysulfides
US5596116A · kind A · utility
36Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1995 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Sep 11, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/1892
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sulfur-containing organosilicon compounds useful as coupling agents in vulcanizable rubbers to enhance various properties, including low rolling resistance for automobile tires, are prepared. Preferred compounds include .OMEGA., .OMEGA.'-bis (trialkoxysilylalkyl) polysulfides. In one embodiment, the reaction product of ethanolic sodium ethoxide and elemental sulfur is reacted with chloropropyltriethoxysilane. Alternatively, sodium metal is reacted with a mixture of ethanol and elemental sulfur, and then chloropropyltriethoxysilane. The use of sodium metal alcoholates provides an efficient and economical process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.