Stable polyvinyl ester dispersions and methods of producing the same

US3954687A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Hubert Wiest · Burghausen, DE
• Wilhelm Lechner · Burghausen, DE

Key dates

• Filing date: Oct 2, 1974
• Grant date: May 4, 1976
• Expiry date: Oct 2, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F18/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An improvement in the production of polyvinyl ester dispersions by polymerization of vinyl esters or copolymerization of vinyl esters with up to 40% by weight of oil-soluble, mono-olefinically-unsaturated monomers in an aqueous emulsion in the presence of water-soluble radical-forming polymerization catalysts, protective colloids and optionally emulsifiers and polymerization aids, the improvement comprising using carboxymethyl celluloses having a substitution degree of at least 10 as said protective colloids; as well as stable mixtures of the said polyvinyl ester dispersions and dextrin.