Vinyl ester copolymer dispersions, their preparation and use

US8785540B2 · kind B2 · utility

Assignee

• Celanese Emulsions GmbH · DE

Inventors

• Harmin Müller · Hofheim, DE
• Hans Uwe Faust · Aachen, DE
• Martin Schäfer · Arnstadt, DE

Key dates

• Filing date: Aug 7, 2007
• Grant date: Jul 22, 2014
• Expiry date: Oct 22, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A description is given of an aqueous vinyl ester copolymer dispersion stabilized with a combination of at least one protective colloid and of at least one emulsifier, said dispersion having a viscosity of less than 8000 mPa*s, a weight average dw of the particle sizes of 0.5 to 10 μm, and a ratio of weight average to number average of the particle sizes, dw/dn, of at least 2.5, and the polymer possessing a glass transition temperature of between −30 and +15° C.The dispersion can be used as an adhesive for nozzle application processes.