Silane-modified dispersion powders

US8470120B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Marion Killat · Burghausen, DE
• Stefan Killat · Burghausen, DE

Key dates

• Filing date: Oct 13, 2006
• Grant date: Jun 25, 2013
• Expiry date: Sep 27, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/54
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Water-redispersible polymer powder compositions are obtained by means of free-radical-initiated polymerization in aqueous medium of one or more monomers of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides and subsequent drying of the polymer dispersion, wherein one or more silanes of the general formula (RO)3−nR1nSiR2X (1) where X is an amino- or epoxy-containing radical are added before drying of the polymer dispersion. The powders are especially useful in tile adhesives for tiles having low water absorbtion capacity.