Liquid coating compositions containing little or no solvent

US4204014A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Jorg Dorffel · Marl, DE
• Werner Andrejewski · Dorsten, DE
• Wilfried Bartz · Marl, DE

Key dates

• Filing date: May 7, 1979
• Grant date: May 20, 1980
• Expiry date: May 7, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D167/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a liquid coating composition comprising a small amount of solvent or no solvent, a binder and optionally conventional auxiliary agents, wherein the binder consists essentially of: PA1 (A) 45-10% by weight of an aminoplast, the low molecular weight precursors thereof, or mixtures thereof; and PA1 (B) 55-90% by weight of an at least difunctional polyester or a mixture of such polyesters; wherein the polyester component B has been produced by the condensation of a conventional alcohol component I with an acid component III, wherein component III consists essentially of a mixture of: PA1 III.1 67-92 molar percent of hexahydroterephthalic acid or a lower alkyl ester thereof; and PA1 III.2 8-33 molar percent of an aromatic dicarboxylic acid or a lower alkyl ester derivative thereof; PA1 wherein the polyester component B has a molecular weight of 300-1,500 and wherein the binder may be obtained by the cocondensation of aminoplast component A with polyester component B, or by the cocondensation of the starting materials used for the production of aminoplast component A with polyester component B; PA1 the improvement wherein component III.2 is terephthalic acid or a lower alkyl ester der…