Process for preparing branched organopolysiloxanes
US11674000B2 · kind B2 · utility
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Key dates
| Filing date | Aug 24, 2018 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Nov 12, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Branched organopolysiloxanes are prepared from alkoxysilanes and polydiorganosiloxanes over two stages by basic equilibration and subsequent acid-catalyzed reaction with water to the desired degree of condensation, wherein the entire process does not require the use of additional organic solvent, no wastewater is generated and the process is particularly suitable for the controlled production of so-called DT resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.