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US 10,544,267 B2Granted
Method for producing siloxanes containing glycerin substituents
AssigneeEvonik Degussa GmbH
InventorsWilfried Knott, Horst Dudzik, Klaus-Dieter Klein
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Abstract
The invention relates to a method for producing siloxanes that have glycerin modifications and, at the same time, hydrophobic substituents. The invention further relates to a siloxane that has glycerin modifications and also hydrophobic side chains, wherein at least some of the glycerin modifications bear ketal groups, and to the use of said new siloxanes.
Claims13
A method for preparing modified siloxanes comprising the method steps of
- A) providing a hydrogen siloxane having at least three SiH groups per molecule;
- B) hydrosilyling the hydrogen siloxane with
- at least one α-olefinic hydrocarbon having 2 to 36, carbon atoms and at least one ketalized glycerol derivative comprising:
- a glycerol skeleton and one α-olefinic coupling group;
- and
- C) purifying the hydrosilylated siloxane;
- and
- D) at least partial acidic hydrolysis of the ketals present in the ketalized glycerol derivatives reacted with the hydrogen siloxane.
5 more elements
Dependencies are inferred from the claim text.