Patent ID: 6268415
Filing Date: 2001-07-31
Classification: B32B,C08K,C09J,F24S,Y02E,Y10T

Abstract:
A stabilized adhesive composition, suitable for use as an adhesive layer in a laminted article or multilayer construction, which comprises(a) an adhesive selected from the group consisting of(i) polyurethanes;(ii) polyacrylics;(vi) poly(vinyl butyral);(viii) polyacrylates;(xi) poly(ethylene/vinyl acetate);(xvii) poly(vinyl acetate); and(xx) polyesters; and(b) an effective stabilizing amount of a highly soluble and photostable benzotriazole which is 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole , 5-fluoro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-octylphenyl)-2H-benzotriazole , 2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole or 5-fluoro-2-(2-hydroxy-3-.alpha.-cumyl-5-tert-butylphenyl)-2H-benzotriazole ;with the proviso that the benzotriazole in component (b) exhibits enhanced durability and low loss of absorbance when exposed to actinic radiation as witnessed by an absorbance loss of less than 0.5 absorbance units after exposure for 893 hours or less than 0.8 absorbance units after exposure for 1338 hours in a Xenon Arc Weather-Ometer.