Patent ID: 6420050
Filing Date: 2002-07-16
Classification: B32B,Y10T

Abstract:
A multilayer thermoformable composite structure comprising a formulated layer (A) bonded to a layer (B), wherein said layer (A) comprises a polymer composition comprising:(Ai) from about 50% to about 90% by weight of a polymethacrylate ester or polyacrylate ester polymer or their copolymers or blends thereof; and at least one of: (Aii) from about 0% to about 45% by weight of at least one block polymer of a vinyl aromatic monomer and an aliphatic conjugated diene, a selectively hydrogenated derivative thereof, or a selectively hydrogenated derivative thereof to which has been grafted a unsaturated carboxylic reagent or anhydride, wherein the block polymer contains up to about 50% by weight bound styrene; or (Aiii) from about 0% to about 45% by weight of at least one block polymer of a vinyl aromatic monomer and a conjugated diene, a partially hydrogenated derivative thereof, or a selectively hydrogenated derivative thereof to which has been grafted a unsaturated carboxylic reagent or anhydride, wherein the block polymer contains greater than about 60% by weight bound vinyl aromatic monomer; and wherein said layer (B) comprises from about 30% to about 100% by weight of a polyolefin.