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US 10,246,559 B2Granted
Method for preparing silicone resins containing hydroxy groups and alkoxy groups
AssigneeWacker Chemie AG
InventorSabine Hoffmann
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Abstract
The chlorohydrocarbon content of silicone resins prepared from alkoxysilanes is reduced by reacting alkoxysilane and 0.01-1 pbw chlorinated hydrocarbons with water at at least 50° C. and for at least 30 minutes, in the absence of a water immiscible solvent.
Claims18
A process for preparing silicone resins bearing hydroxy groups and alkoxy groups, comprising:
- reacting at a temperature of at least 50° C. and for at least 30 minutes,
- a) 100 parts by weight of alkoxysilane,
- b) from 0.01 to 1 parts by weight of hydrocarbon containing, based on alkoxysilane, from 10 to 2000 ppm by weight of Cl, and
- c) water
- without the addition of organic solvent(s) which at 0.1 MPa and 20° C. are soluble to a maximum extent of 1% by weight in water.
2 more elements
Dependencies are inferred from the claim text.