Redispersible, dispersion-powder composition

US6127483A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Hans-Peter Weitzel · Reischach, DE
• Peter Ball · Emmerting, DE
• Reiner Figge · Ampfing, DE

Key dates

• Filing date: Jun 15, 1998
• Grant date: Oct 3, 2000
• Expiry date: Jun 15, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L41/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to dispersion-powder compositions redispersible in water and containing (a) a vinyl ester ethylene copolymer with 50 to 90% by weight of vinyl esters of C.sub.2 to C.sub.12 carboxylic acid, 1 to 30% by weight of ethylene, 0-20% by weight of vinyl esters of .alpha.-branched monocarboxylic acids with 5 to 10 C-atoms, each in relation to the total weight of the vinyl ester ethylene copolymer, and (b) a water soluble copolymer with 20 to 80% by weight of hydrophobic, substantially water insoluble monomers, 20 to 80% by weight of water-soluble, salt-forming monomers from the group of ethylenically unsaturated sulfonic acids, and 0 to 50% by weight of ethylenically unsaturated monocarboxylic or dicarboxylic acids or the anhydrides thereof, each in relation to the total weight of the water soluble copolymer.