Reclaimable polyester film having adhesion-promoting coating

US5045347A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• John D. Gribbin · Schlangenbad, DE
• Hermann Dallmann · Wiesbaden, DE
• Dieter Engel · Kelsterbach, DE
• Hartmut Hensel · Schlangenbad, DE

Key dates

• Filing date: Apr 26, 1990
• Grant date: Sep 3, 1991
• Expiry date: Apr 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2367/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A reclaimable polyester film is disclosed which comprises an oriented polyester film which has been coated with an adhesion-promoting coating. The coating is applied to the film as an aqueous dispersion and is dried and crosslinked by the application of heat. The coating is prepared by the free-radical emulsion polymerizable of the following components: PA1 A) 1 to 99% by weight of a polymer having carboxy and epoxy groups in the form of an aqueous system with, PA1 B) 1 to 99% by weight of at least one copolymerizable .alpha.-.beta.-olefinic unsaturated monomer, each with reference to the total solids content of the components, and PA1 C) 0.01 to 10% by weight of at least one polymerization initiator, based upon the monomer proportion of the components B), and PA1 D) 0 to 20% by weight of anionic or nonionic emulsifiers or a mixture of both, or also of protective colloids, with reference to the proportion of component B).