Process for preparing organopolysiloxanes
US8664346B2 · kind B2 · utility
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9References
20Claims
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Key dates
| Filing date | Jan 22, 2008 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Feb 8, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A targeted molecular weight of an organopolysiloxane is obtained in a two stage hydrolysis by hydrolyzing a chlorosilane with from 0.002 to 0.6 mol of water in a first step in the presence of alcohol, in which the pressure and/or temperature are adjusted such that following further hydrolysis in a second step, the targeted molecular weight is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.