Preparation of alkoxy- and/or halosilane (poly)sulfides and coupling agents comprised thereof
US8273911B2 · kind B2 · utility
1Cited by
2References
11Claims
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Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Jan 3, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/548
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, R1.1 and R1.3=methyl and R1.2=ethoxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.