Materials suitable as crosslinkable binder components

US5922469A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Wunsch · Speyer, DE
• Gregor Brodt · Heppenheim, DE
• Ria Kress · Ludwigshafen, DE
• Norbert Schneider · Schorndorf, DE
• Albert Kohl · Laumersheim, DE
• August Lehner
• Werner Balz · Schifferstadt, DE

Key dates

• Filing date: Apr 15, 1997
• Grant date: Jul 13, 1999
• Expiry date: Apr 15, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31609
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting PA1 1) a polyurethane (II) comprising PA2 a) 1 mol of a diol (III) having an average molecular weight of from 400 to 4000, PA2 b) from 0.3 to 9 mol of an aliphatic or cycloaliphatic diol (IV) of 2 to 18 carbon atoms, PA2 c) from 0.3 to 9 mol of an aromatic diol (V) of 8 to 30 carbon atoms, PA2 d) from 0.01 to 1 mol of a trihydric alcohol (VI) of 3 to 18 carbon atoms, PA2 e) from 0.001 to 1 mol of a polyhydric alcohol (VII) of 3 to 14 carbon atoms which contains a tertiary amino group and PA2 f) an amount of a diisocyanate (VIII) of 6 to 30 carbon atoms such that the molar ratio of the isocyanate groups to the total number of hydroxyl groups in (III) to (VII) is from 1.05:1 to 1.4:1 PA1 with PA1 2) a compound (IX) which contains one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups, the amount of (IX) being such that the number of reactive amino groups corresponds to the number of isocyanate groups in the polyurethane (II). The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the pr…