Aqueous latent-crosslinking polyurethane dispersions

US5905113A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrike Licht · Mannheim, DE
• Nicolas Kokel · Alleins, FR
• Karl Haberle · Speyer, DE
• Maximilian Angel · Mutterstadt, DE
• Peter Weyland
• Günter Scherr · Ludwigshafen, DE

Key dates

• Filing date: May 14, 1997
• Grant date: May 18, 1999
• Expiry date: May 14, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2666/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous latent-crosslinking polyurethane dispersions, comprising PA1 I) a disperse phase (P.I) including PA2 Ia) polyurethanes (PUR.Ia) carrying not only groups which render the polyurethane dispersible in water but also groups with a C--C double bond which is activated by a carbonyl attached directly to it, or PA2 Ib) a mixture of PA3 a polyurethane (PUR.Ib) carrying groups which render the polyurethane dispersible in water but no groups with a C--C double bond which is activated by carbonyl attached directly to it, and PA3 a compound (V.I) different from the polyurethanes PUR.Ia and PUR.Ib, which carries groups with a C--C double bond which is activated by a carbonyl attached directly to it, and PA1 II) a compound having PA2 on average at least 2 hydrogens present as amino function, PA2 a solubility in water of more than 1 g/l (25.degree. C.) and PA2 a number-average molecular weight (M.sub.n) of from 200 to 1,000,000 (compound II).