2K polyurethane systems with phase separation

US10131738B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Andreas Ferencz · Goldkronach, DE
• Lothar Thiele · Langenfeld, DE
• Tamara Schmidt · Oberhausen, DE
• Konrad Becker · Goldkronach, DE
• Wolfgang Lupp · Duisburg, DE
• Dustin Ullmann · Stuttgart, DE
• Oliver-Kei Okamoto · Goldkronach, DE

Key dates

• Filing date: Aug 25, 2014
• Grant date: Nov 20, 2018
• Expiry date: Aug 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a two-component polyurethane composition containing i) 10 to 80 wt. % of at least one polyol with an average molecular weight of 200 g/mol to 3000 g/mol, ii) 5 to 60 wt. % of at least one aromatic polyisocyanate, and iii) 0 to 15 wt. % of an additive. The composition has an NCO:OH ratio of 2:1 to 1:2, and the composition has a viscosity of 20 to 3000 mPas (EN ISO 2555, Brookfield viscometer, 25° C.) and displays a phase incompatibility after the mixing process. The functionality of the polyol mixture is greater than 2.3.