Hybrid polyurethane-polymer dispersion with high film hardness, method for the production and the use thereof

US6566438B1 · kind B1 · utility

Assignee

• SKW Bauchemie GmbH · DE

Inventors

• Stefan Ingrisch · Seebruck, DE
• Alois Maier · Waldkraiburg, DE
• Herbert Winkelmann · Garching bei München, DE
• Franz Wolfertstetter · Palling, DE
• Alfred Kern · Schneeberg, DE
• Josef Weichmann · Pleiskirchen, DE

Key dates

• Filing date: Mar 22, 2001
• Grant date: May 20, 2003
• Expiry date: Mar 22, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2270/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described is a polyurethane/polymer hybrid dispersion with high film hardness, which comprises the reaction components(A) from 3 to 25% by weight of a polyol component consisting of(i) from 2 to 20% by weight of a relatively high molecular mass polyol component,(ii) from 0.5 to 5% by weight of a low molecular mass polyol component,(iii) from 0.5 to 3% by weight of a low molecular mass and anionically modifiable polyol component,(B) from 2 to 20% by weight of a polyisocyanate component,(C) if desired, from 0 to 6% by weight of a solvent component consisting of(i) at least one polyisocyanate-inert organic solvent and/or(ii) a polyisocyanate-inert reactive diluent,(D) from 0.15 to 1.5% by weight of a neutralizing component,(E) from 0.1 to 1% by weight of a chain extender component,(F) from 5 to 40% by weight of a monomer component,(G) from 0.01 to 1.5% by weight of an initiator component,and water as the remainder.The advantages of the polyurethane/polymer hybrid dispersion of the invention, such as high hardness coupled with high flexibility of the crack-free films, good chemical resistance, great stability of the dispersion within a wide pH range, good freeze/thaw stability, and the…