Radiation-curable compounds containing polyester acrylate

US10844229B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Delphine Kimpel · Mulhouse, FR
• Kenneth Shaun Tranter · Monsheim, DE
• Daniel Kunz · Heidelberg, DE
• Kathrin Cohen · Ludwigshafen am Rhein, DE
• Peter Thuery · Ludwigshafen, DE
• Christine Roesch · Mainz, DE
• Stefan Wahl · Ludwigshafen, DE

Key dates

• Filing date: Oct 2, 2017
• Grant date: Nov 24, 2020
• Expiry date: Oct 2, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2467/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Radiation-curable, polyester acrylate-containing compositions (I) obtainable by reacting 0.5 to 20 mol % of a polyester polyol (A) and 0.5 to 30 mol % of a polyester diol (B) with 1 to 10 mol % of phthalic anhydride (C) and 65 to 75 mol % of (meth)acrylic acid (D) in the presence of an acidic esterification catalyst, a hydrocarbon (L), and a polymerization inhibitor. Reaction temperatures range from 60 to 140° C. The hydrocarbon (L) functions as solvent, forms an azeotropic mixture with water, and is removed distillatively after esterification. Water formed in the reaction is removed azeotropically. After neutralization of the esterification catalyst, free (meth)acrylic acid is reacted with an epoxide compound (E) in an amount equivalent to the acid number of the reaction mixture. The compound (E) has at least two epoxide groups per molecule. The compositions are suitable for coating the surfaces of solid substrates.