Polyurethanes

US5985985A · kind A · utility

Assignee

• BASF SE

Inventors

• Franz Weingart · Leimen, DE
• Uwe Burkhardt · Kaiserslautern, DE
• Stephan Bauer · Ostercappeln, DE
• Wolfgang Reich · Frankenthal (Pfalz), DE
• Albert Kohl · Laumersheim, DE

Key dates

• Filing date: Jun 26, 1997
• Grant date: Nov 16, 1999
• Expiry date: Jun 26, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/6705
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethanes I obtained by reacting PA1 1) an isocyanate II as defined in the specification with PA1 2) a compound V which is suitable as chain extender, obtained by PA2 a) reacting a polyhydric alcohol VI with PA2 b1) a compound VII, which includes an epoxy function and, in addition, an alcohol-reactive functional group, to form a compound VIII, and reacting a compound VIII with an .alpha.,.beta.-olefinically unsaturated carboxylic acid IX to give a compound X or PA2 b2) an .alpha.,.beta.-olefinically unsaturated carboxylic acid IX, to give a compound X and PA2 c) reacting a compound X with an amine XI having at least one primary amino which is reactive toward the .alpha.,.beta. multiple bond of IX, the sum of the number of isocyanato-reactive aminos and hydroxyls of the compound V being greater than the number of isocyanate groups of the compound II. The polyurethanes are useful as binders or binder components for pigment0free or pigment-containing coatings.