Polyisocyanate mixtures containing acylurea groups

US6384175B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karsten Danielmeier · Solingen, DE
• Hans-Josef Lass · Recklinghausen, DE
• Martin Brahm · Siegen, DE
• Raul Pires · Cologne, DE
• Karl-Ludwig Noble · Cologne, DE
• Robert Reyer · Tönisvorst, DE
• Burkhard Blümel · Recklinghausen, DE

Key dates

• Filing date: Feb 15, 2001
• Grant date: May 7, 2002
• Expiry date: Feb 15, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to water-dispersible polyisocyanate mixtures which is the reaction product ofA) a lacquer polyisocyanate having a uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and/or oxadiazinetrione group and prepared from monomeric diisocyanates andB) a polyalkylene oxide polyether containing at least one carboxylic acid group,wherein the polyalkylene oxide polyether is linked to the lacquer polyisocyanate through a reaction between an isocyanate group and a carboxylic acid group to form an acylated urea group or an amide bond. The invention further relates to a process for their preparation and their use as a starting component in the preparation of polyurethane plastics, in particular as crosslinking agents for water-soluble or -dispersible lacquer binders or binder components with isocyanate-reactive groups.