Patent ID: 8956497
Filing Date: 2015-02-17
Classification: B32B,C08G,C09D,C09J,Y10T

Abstract:
1. A method, comprising: adhesive-bonding at least one first substrate to at least one second substrate with an adhesive comprising a biodegradable aqueous dispersed polyurethane, thereby forming a biodisintegratable composite foil, wherein at least one of the at least one first substrate and the at least one second substrate is a biodisintegratable polymer foil, and at least 60% by weight of the biodegradable aqueous dispersed polyurethane comprises: (a) a diisocyanate; (b) a polyesterdiol; and (c) a bifunctional carboxylic acid selected from the group consisting of a dihydroxycarboxylic acid and a diaminocarboxylic acid, wherein said biodegradable aqueous dispersed polyurethane exhibits a ratio of gaseous carbon liberated therefrom in the form of CO wherein at most 10% of an original dry weight of said biodisintegratable composite foil is found to be present after aerobic composting for a period of at most 12 weeks in a sieve fraction >2 mm.