Hydrolyzed vinyl acetate-vinyl alkoxy silane polymers

US4097436A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Robert Buning · Troisdorf, DE
• Gerhard Bier · Troisdorf, DE

Key dates

• Filing date: Jun 11, 1976
• Grant date: Jun 27, 1978
• Expiry date: Jun 11, 1996

Classification

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

Abstract

A polymer of vinylacetate and a vinylalkoxysilane wherein the alkoxy groups of said vinylalkoxysilane are in a saponified form and the acetyl groups of said vinylacetate are at least partially saponified, the vinyl silane radicals of said copolymer having the formula ##STR1## WHEREIN R is hydrogen, aryl, cycloalkyl or a branched or unbranched saturated alkyl of 1 to 18 carbon atoms; PA0 Ma is an alkali metal, NH.sub.4 or H; PA0 n is 0 to 2; A process for preparing such a saponified copolymer by contacting a solution of vinylacetate-vinylalkoxysilane copolymer with an alcoholic solution of an alkali metal hydroxide, isolating a precipitated copolymer and dissolving said copolymer in an aqueous alkali metal hydroxide or aqueous ammonia solution; the use of said copolymer as a surface coating agent for inorganic silicaceous substrates.