Process for producing porous polyurethane coatings using polyol ester additives

US11851583B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Michael Klostermann · Essen, DE
• Martin Glos · Borken, DE
• Jan Marian von Hof · Bochum, DE
• Verena Dahl · Cologne, DE
• Christian Eilbracht · Herne, DE
• Oliver Springer · Wesel, DE
• Hans Henning Wenk · Mülheim an der Ruhr, DE

Key dates

• Filing date: Jul 13, 2017
• Grant date: Dec 26, 2023
• Expiry date: Apr 2, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/54
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing a porous polyurethane coatings, using a polyol ester as additives in an aqueous polymer dispersion, the process comprising the steps of a) providing a mixture comprising an aqueous polymer dispersion, a polyol ester, and an additive, b) foaming the mixture to give a homogeneous, fine-cell foam, c) adding at least one thickener to establish the desired viscosity of the wet foam, d) applying a coating of the foamed polymer dispersion to a suitable carrier, e) drying the coating. The invention further relates to a phosphorylated polyol ester.