MULTILAYER PULTRUDED STRUCTURE HAVING A CHEMICAL RESISTANT AND WEATHERABLE TOP LAYER

摘要

The invention relates to a multilayered pultruded structures having a weatherable cap layer over a pultruded substrate. The cap layer provides improved weatherability, chemical resistance and surface quality for pultruded structures. The cap layer is either an acrylic, vinyl or styrenic cap layer covered with a thin layer blend of polyvinylidene fluoride and acrylic polymers, or a cross-linked acrylic outer layer. A useful cap layer would be a UV resistant acrylic cap layer, such as a Solarkote® resins from Arkema, covered by a co-extruded blend of polyvinylidene fluoride, such as Kynar® resins from Arkema, with an acrylic resin, such as Plexiglas® resins from Arkema. The highly weatherable and chemical resistant pultruded structure is especially useful in window and door profiles.