Hydrophilic polyurethanes

US6399735B1 · kind B1 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Herbert Fischer · Goldkronach, DE
• Winfried Emmerling · Neuss, DE
• Thomas Moeller · Goldkronach, DE
• Hermann Onusseit · Haan, DE
• Werner Haller · Erkrath, DE
• Bernhard Schoettmer · Monheim, DE
• Bernhard Herlfterkamp · Bottrop, DE
• Dieter Feustel · Monheim, DE
• Klaus Friedrich · Lake Forest, US
• Hartmut Buesching · Raddestorf, DE
• Norbert Huebner · Goldkronach, DE

Key dates

• Filing date: Jul 27, 1995
• Grant date: Jun 4, 2002
• Expiry date: Jul 27, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/905
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A hydrophilic, high molecular weight nonionic polyurethane, characterized by solubility in water and by a specific viscosity of at least 0.4 (1% by weight solution at 20° C.) is provided. Examples of such polyurethanes are those characterized by the following structural units:a) —O(—CH2—CH2—O)n—,where n=8 to 500, andb) —CO—NH—X—NH—CO—,where X is an aliphatic or cycloaliphatic radical.Also provided are methods of using the polyurethane as an adhesive, more particularly a hotmelt adhesive or a solvent-based adhesive, for example a wallpaper adhesive and labelling adhesive, of using polyurethane as a stabilizer in the emulsion polymerization of, in particular, vinyl acetate and vinyl chloride and in the copolymerization of ethylene and vinyl acetate, and of using the polyurethane as a thickener for aqueous systems, more particularly together with nonionic surfactants.