Method of coagulating aqueous PUR dispersions containing dispersed therein reactive or secondary cross-linked polyurethane, the products obtained thereby and their use

US6451963B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rolf Langel · Leverkusen, DE
• Detlef-Ingo Schutze · Recklinghausen, DE
• Werner Balz · Schifferstadt, DE
• Eberhard Konig · Kronberg, DE

Key dates

• Filing date: Jun 6, 2001
• Grant date: Sep 17, 2002
• Expiry date: Jun 6, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the coagulation of PU dispersions, the coagulation products thus obtained and the use of the coagulated PU dispersions.Reactive or post-crosslinkable PU dispersions are suitable as PU dispersions for the process according to the invention. The processes according to the invention comprise the production of films, the coating of many different materials and the partial or complete impregnation of nonwoven, knitted or other fabrics for strengthening purposes.