Process for the production of silicic acid heteropolycondensates useful as coating materials

US4243692A · kind A · utility

Assignee

• FRAUNHOFER-GESELSCHAFT · DE

Inventors

• Horst Scholze · Würzburg, DE
• Helmut Schmidt · Riegelsberg, DE

Key dates

• Filing date: Dec 27, 1978
• Grant date: Jan 6, 1981
• Expiry date: Dec 27, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the production of silicic acid heteropolycondensates wherein at least one substituted silane; at least one functional silane; at least one hydrolysable silicic acid derivative and optionally at least one substantially involatile oxide soluble in the reaction medium, or a compound convertible thereto, are condensed in the presence of at least the quantity of water stoichiometrically required for hydrolysis and optionally in the presence of a condensation catalyst and/or a solvent. The heteropolycondensates prepared by this process are useful in the preparation of coatings for substrates, which coated substrates are useful as supports in the culture of living cells.