Patent ID: 6221198
Filing Date: 2001-04-24
Classification: C09J,Y10S,Y10T

Abstract:
A method for protecting a film or membrane in UV exposure conditions, comprising the steps of:(a) selecting a film or membrane that will develop cracks upon exposure to 200 hours of ultraviolet light under ASTM G53-91 (1991) conditions when having no adhesive applied thereto;(b) applying to said film or membrane, an adhesive comprising at least one environmentally stabilizing agent that reduces or slows the effect of light energy, said stabilizing agent being present in an amount sufficient to provide protection such that said film or membrane having the adhesive applied thereto does not develop cracks upon exposure to 200 hours of ultraviolet light (UVA 340 nm.) under ASTM G53-91 (1991) conditions; and(c) exposing said adhesive-coated film or membrane to ultraviolet light conditions that would crack said film or membrane in the absence of said adhesive.