Patent ID: 9303132
Filing Date: 2016-04-05
CPC Classification: B32B,C08J,Y10T

Claim Text:
1. A transparent exterior window film composite comprising: a base sheet material having an outer polyethylene terephthalate film layer comprising a UV absorber; an undercoat layer coated on the polyethylene terephthalate film layer, wherein the undercoat layer comprises a UV light-cured, water-based acrylic or urethane-acrylic polymer and wherein the undercoat layer has a thickness of about 6 to about 20 microns; a hard coat layer coated on the undercoat layer, formed from at least one aliphatic urethane acrylate oligomer having a functionality of 2 and at least two multifunctional acrylate monomers selected from the group consisting of tricyclodecane dimethanol diacrylate, dioxane glycol diacrylate, 1,6-hexanediol diacrylate, cyclohexane dimethanol diacrylate, dipentaerythritol pentaacrylate and combinations thereof, and wherein said hard coat layer has a thickness of about 6 to about 8 microns, and wherein the undercoat layer is at least as thick as the hard coat layer; and wherein the film composite has a life of 1500 to 2400 hours before adhesion failure between the hard coat and the base sheet material when tested in accordance with ASTM G 155.