A UV weatherable film construction is provided which is capable of retaining its dimensional stability under extreme environmental temperatures and humidities. The base film polymer, syndiotactic polystyrene, has characteristically low moisture absorption, excellent thermal stability, and high transparency....http://www.google.fr/patents/US5981076?utm_source=gb-gplus-shareBrevet US5981076 - UV protected syndiotactic polystyrene overlay films
UV protected syndiotactic polystyrene overlay films
