Air-drying acrylate lacquer binders

US4129537A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rolf Dhein · Krefeld, DE
• Lothar Fleiter · Krefeld, DE

Key dates

• Filing date: Oct 14, 1977
• Grant date: Dec 12, 1978
• Expiry date: Oct 14, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An air-drying lacquer binder comprising a copolymer of copolymerized units of PA1 20 to 55% by weight of styrene, PA1 5 to 30% by weight of glycidyl(meth)acrylate, and PA1 0 to 50% by weight of at least one (meth)acrylic acid ester with 1 to 10 carbon atoms in the alcohol component, Which has been esterified with PA1 0 to 15% by weight of at least one natural, drying fatty acid, and PA1 10 to 50% by weight of isomerized drying fatty acids (the sum of the percentage contents amounting to 22 - 50 percent by weight) based on the copolymer and drying fatty acids and dicarboxylic acid anhydride subsequently used, up to an acid number of <10, from 30 to 75% by wt. of the isomerised drying fatty acids containing conjugated double bonds, and wherein the hydroxyl groups formed have, subsequently, been reacted with from 0.5 to 3% by weight, based on the total components of the binder, of tetrahydrophthalic acid anhydride and/or at least one isomer thereof. The lacquer binders possess very good pigment absorbing and wetting properties, very good lacquer-grade processibility and even after the addition of an anti-skinning agent constant drying times under constant drying conditions.