Radiation curable coating composition based on chain-extended and cross-linked polyurethanes

US10584262B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sebastian Berger · Olavarría, AR
• Peter Thuery · Ludwigshafen, DE
• Susanne Neumann · Speyer, DE
• Christine Roesch · Mainz, DE
• Uwe Burkhardt · Kaiserslautern, DE
• Katharina Andes · Frankenthal (Pfalz), DE
• Stefan Wahl · Ludwigshafen, DE
• Manfred Biehler · Kirchheimbolanden, DE
• Sebastian Roller · Mannheim, DE

Key dates

• Filing date: Dec 7, 2015
• Grant date: Mar 10, 2020
• Expiry date: Jul 2, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/758
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to aqueous polyurethane dispersions that are curable with UV radiation. The polyurethanes are chain-extended with aromatic, cycloaliphatic or aliphatic diamine compound and cross-linked with aliphatic triamine compound. The polyurethanes are useful dispersions for coating various substrates. The use of the invented dispersions results in high hardness, very good flexibility and good chemical resistance in both clear coats and pigmented coatings before and after UV curing combined with very good adhesion to different substrates.