Weatherable styrenic film structures with intermediate tie layer and laminates thereof

A flexible film structure adapted for use as a weatherable surface coating on a substrate, comprising:

• a) at least one weatherable layer comprising from about 50 weight percent to 100 weight percent of a weatherable polymer selected from the group consisting of acrylonitrile-ethylene/propylene rubber-styrene, acrylonitrile-styrene-acrylate rubber, styrene acrylonitrile, and blends thereof, said weatherable layer having a l percent secant modulus of greater than about 150,000 psi;
• b) at least one intermediate tie layer, underlying the weatherable layer comprising a thermoplastic polymer selected from the group consisting of chlorinated polyethylene, styrenic block polymer, copolyamide adhesives, copolyester adhesives, polyvinyl, polyurethanes, ethylene propylene diene copolymers, and mixtures thereof, said intermediate tie layer being adjacent to and adhered to said at least one weatherable layer, said intermediate tie layer having a 1 percent secant modulus of less than about 150,000 psi;
• and
• c) at least one adhesive layer, underlying said intermediate tie layer, comprising an ethylene copolymer or terpolymer, chlorinated polyethylene, styrenic block polymer, copolyamide adhesive, copolyester adhesive, polyvinyl chloride, polyurethane, or a mixture thereof, said adhesive layer adjacent to and adhered to said at least one intermediate tie layer, said adhesive layer having a 1 percent secant modulus of less than about 150,000 psi;
• wherein the total thickness of the film structure is less than about 25 mils.