Wässriges Polyurethan

Details

Veröffentlichungs-Nr.

EP4803560

Anmeldetag

30. September 2024

Veröffentlichung

8. Mai 2025

Rechtsraum

EP

Abstract

The present disclosure provides, for example, a water-based polyurethane that is superior in storage stability and quick-drying ability and capable of forming a urethane film superior in chemical resistance even for short-time film formation, and a production method for the water-based polyurethane. The water-based polyurethane of the present disclosure is characterized by being a water dispersion of polyurethane, the water dispersion containing polyurethane and water, wherein the polyurethane contains: a main chain having a urethane bond and a structure represented by a formula (1); and a side chain branching from the main chain and having a hydrophilic group, wherein the formula (1) is as follows:wherein R groups are the same or different, each being a linear or branched or alicyclic divalent hydrocarbon group having 2 to 20 carbon atoms and optionally substituted with a heteroatom, n represents an integer of 1 to 50, and * indicates bonding, the content proportion of the structure represented by the formula (1) with respect to the total mass of the polyurethane is 35% by mass or more, the polyurethane contains 0.00 to 0.85% by mass of a carboxyl group and a carboxylate group with respect to the total mass of the polyurethane, and the solid content of the polyurethane to the water dispersion is 35% by mass or more.

Anmelder

Firma

ASAHI KASEI KABUSHIKI KAISHA

Land

🇯🇵 Japan