Preparation of (meth)acrylates

US6458991B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Wolfgang Paulus · Lam, DE
• Wolfgang Reich · Frankenthal (Pfalz), DE
• Erich Beck · Ladenburg, DE
• Thomas Jaworek · Kallstadt, DE
• Rainer Koniger · Freinsheim, DE

Key dates

• Filing date: Jun 13, 2000
• Grant date: Oct 1, 2002
• Expiry date: Jun 13, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds having alcoholic hydroxyl groups are esterified with acrylic or methacrylic acid in the presence of copper(II) salts or mixtures thereof as polymerization inhibitors and in the presence of a hydrocarbon as a water-entraining agent with removal of the water of reaction at from 90 to 150° C. After the esterification, the copper salt is precipitated as copper sulfide and is separated off from the ester. The light-color (meth)acrylates resulting in the high yields are particularly suitable for coatings containing colored pigment on substrates such as wood, paper, mineral building materials, plastics or metal.