Organic/inorganic composites with low hydroxyl group content, method for their production and application

US6303730A · kind A · utility

Assignee

• Institut fuer Neue Materialien gemeinnuetzige GmbH · DE

Inventors

• Kira Fries · Neunkirchen, DE
• Martin Mennig · Idar-Oberstein, DE
• Helmut Schmidt · Riegelsberg, DE
• Ulrich Sohling · Freising, DE
• Qiwu Xing · Homburg, DE
• Michael Zahnhausen · Riegelsberg, DE

Key dates

• Filing date: Aug 19, 1999
• Grant date: Oct 16, 2001
• Expiry date: Aug 19, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1018
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to transparent organic/inorganic composites with low hydroxyl group content, based on silicic acid heteropolycondensates having extremely low water uptakes. These composites are obtained for example by nonhydrolytic condensation of chlorosilanes with polymerizable groups and optionally fluorinated groups, with the help of a condensation agent (e.g., t-butanol) capable of non-hydrolytic condensation of this chlorosilane, and thermal and/or photochemical polymerization of the obtained condensation product, preferably in the presence of preferably fluorinated organic monomers.