Migratory additives for mask layer of decorative sheet material

摘要

The flexible, weatherable decorative sheet material provided by the present invention comprises a thermoformable decorative paint film having an inner surface and a weatherable outer surface suitable for forming an exterior finish for a part, such as an automobile body part. The sheet material further includes an extensible mask layer releasably adhered to the outer surface of the paint film to form a protective film overlying the paint film. The mask layer comprises a polyurethane, polyolefin, polyester, or polyamide composition and includes at least one migratory additive designed to migrate to the clear coat layer of the paint film or to prevent migration of additives from the mask layer to the clear coat. Migratory additives suitable for use with the present invention include, but are not limited to, hardness enhancers, release agents, ultraviolet light stabilizers, antioxidants, dyes, lubricants, surfactants, catalysts, slip additives and mixtures thereof. A method of constructing the decorative sheet material and a composite shaped part including the decorative sheet material are also provided.