Patent ID: 9005762
Filing Date: 2015-04-14
Classification: B32B,C08G,C09J,Y10T

Abstract:
1. A process for producing composite foils, which comprises: applying an aqueous polyurethane dispersion to a first plastic foil or metal foil to form a layer of said aqueous polyurethane dispersion on said first plastic foil or metal foil; contacting said layer of said aqueous polyurethane dispersion with a second plastic foil or metal foil, and curing said layer of said aqueous polyurethane dispersion to form an adhesive layer between said first plastic foil or metal foil and said second plastic foil or metal foil, thereby forming a composite foil, wherein at least 20% by weight of the polyurethane present in said aqueous polyurethane dispersion is comprised of units of an amorphous polyester polyol which is an ester of carboxylic acid units.