Aqueous polymer dispersions and polymer powders prepared therefrom by spray drying

US5342897A · kind A · utility

Assignee

• BASF SE

Inventors

• Gernot Franzman · Worms, DE
• Folf Petri · Waldkirchen, DE
• Walter Pitteroff · Worms, DE

Key dates

• Filing date: Mar 19, 1993
• Grant date: Aug 30, 1994
• Expiry date: Mar 19, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/50
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Aqueous polymer dispersions containing, I as the disperse phase, a film-forming dispersion polymer and II in the aqueous phase, from 5 to 40% by weight, based on the total dry mass of I and II, of a completely or partially neutralized water-soluble copolymer of PA1 a) from 50 to 80 mol % of an olefinically unsaturated mono- or dicarboxylic acid, of an anhydride of these acids or of a mixture of these monomers, PA1 b) from 20 to 50 mol % of a C.sub.3 -C.sub.12 -alkene, of styrene or of a mixture of these monomers and PA1 c) from 0 to 10 mol % of further monomers which can be subjected to free radical polymerization, and the powders obtained by spray-drying these polymer dispersions are suitable as binders for water-resistant plastics renders and coatings and as adhesives or adhesive components.