Aqueous polyurethane dispersions having latent crosslinking properties

US5840823A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrike Licht · Mannheim, DE
• Nicolas Kokel · Alleins, FR
• Karl Haberle · Speyer, DE
• Renate Wustefeld · Schifferstadt, DE

Key dates

• Filing date: Feb 25, 1997
• Grant date: Nov 24, 1998
• Expiry date: Feb 25, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J175/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous polyurethane dispersions having latent crosslinking properties contain PA0 I) a disperse phase (P.I), containing PA1 Ia) a polyurethane (PUR.Ia) which, in addition to groups which impart water dispersibility to the polyurethane, carries groups which have a C--C double bond and in which the double bond is activated by a carbonyl group bonded directly therewith, or PA1 Ib) a mixture of PA2 a polyurethane (PUR.Ib) which carries groups which impart water dispersibility to the polyurethane but not groups which have a C--C double bond and in which the double bond is activated by a carbonyl group bonded directly therewith and PA2 a compound (V.I) which differs from the polyurethanes PUR.Ia and PUR.Ib, and which carries groups which have a C--C double bond and in which the double bond is activated by a carbonyl group bonded directly therewith and PA0 II) a disperse phase (P.II) containing a compound which differs from the compounds (PUR.Ia), (PUR.Ib) and (V.I) and which carries a plurality of groups selected from the group consisting of the thiol groups, primary amino groups and secondary amino groups.