Latent cross-linking aqueous dispersions comprising a polyurethane

US6599975B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Ulrike Licht · Mannheim, DE
• Karl Haberle · Speyer, DE
• Eckehardt Wistuba · Bad Dürkheim, DE

Key dates

• Filing date: May 1, 2000
• Grant date: Jul 29, 2003
• Expiry date: May 1, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Latent-crosslinking aqueous polyurethane dispersions comprisingI) a disperse phase (P.I) comprisingIa) a polyurethane (Ia) which carries carbodiimide groups in addition to hydrophilic groups which make it dispersible in water but carries essentially no carboxyl groups orIb) a physical mixture ofIbi) a polyurethane (Ibi) which carries hydrophilic groups which make it dispersible in water but carries essentially no carbodiimide or carboxyl groups andIbii) a carbodiimide (Ibii) which carries essentially no hydrophilic groups which make it dispersible in water, andII) a disperse phase (P.II) comprising another polymer (II) which carries carboxyl groups and essentially no carbodiimide groups.