Multilayer composition for packaging

US10252497B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Chien Hsu · Southfield, US
• Marco Balbo Block · Osnabrück, DE
• Andre Kamm · Bohmte, DE

Key dates

• Filing date: Jul 23, 2014
• Grant date: Apr 9, 2019
• Expiry date: Dec 23, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2475/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A multilayer composition for packaging comprising a first polymer film, a second film, at least one print layer between the films and a 1 K isocyanate prepolymer adhesive layer between the at least one print layer and one of the films, where the print layer contains a hyperbranched polyester binder containing functional groups selected from the group consisting of —OH, —COOH and —COOR, where R is methyl, ethyl, vinyl, isopropyl, n-propyl, n-butyl, isobutyl, sec-butyl or tert-butyl provides packaging laminates with excellent adhesion. The hyperbranched polyester is for example a polymer of trimethyolpropane and hexahydrophthalic anhydride and optionally a cycloaliphatic diol.