Printing inks containing oxidatively crosslinkable urethane resins

US5319052A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Bernhard Prantl · Worms, DE
• Dirk Lawrenz · Ludwigshafen am Rhein, DE
• Rolf Walz · Rutesheim, DE

Key dates

• Filing date: Apr 1, 1991
• Grant date: Jun 7, 1994
• Expiry date: Apr 1, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/6659
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Oxidatively crosslinking essentially isocyanate-free urethane resins, obtainable by reacting PA1 A) 100 parts by weight of an ester of PA2 (a.sub.1) an aliphatic C.sub.3 -C.sub.8 -alcohol having three or more hydroxyl groups and PA2 (a.sub.2) an unsaturated C.sub.8 -C.sub.40 -fatty acid and PA2 (a.sub.3) if required, an aliphatic or aromatic polycarboxylic acid of 4 to 20 carbon atoms or an anhydride thereof, in amounts of up to 60% by weight, based on the fatty acid a.sub.2), the ester containing sufficient free hydroxyl groups to correspond to an OH number of 50-150 mg of KOH/g, with PA1 B) PA2 (b.sub.1) 3-120 parts by weight of C.sub.5 -C.sub.15 -polyhydroxycarboxylic acids having two or more hydroxyl groups and PA2 (b.sub.2) 10-100 parts by weight of an aliphatic or cycloaliphatic polyisocyanate or a mixture thereof, at 50.degree.-150.degree. C. in the presence of a nonpolar solvent which is inert to isocyanates, are suitable for use as printing ink components.