Mixtures of cyclic branched siloxanes of the D/T type and conversion products thereof

US10414871B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Wilfried Knott · Essen, DE
• Horst Dudzik · Essen, DE

Key dates

• Filing date: Sep 29, 2017
• Grant date: Sep 17, 2019
• Expiry date: Sep 29, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/70
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Mixtures of cyclic branched siloxanes having exclusively D and T units and having no functional groups, with the proviso that the cumulative proportion of the D and T units having Si-alkoxy and/or SiOH groups that are present in the siloxane matrix, determinable by 29Si NMR spectroscopy, is ≤2 mole percent, are described, as are branched organomodified siloxanes obtainable therefrom.