| abstract |
(57) [Summary] An object of the present invention is to provide an ultraviolet weatherable film (1) structure capable of maintaining its dimensional stability under extreme ambient temperature and humidity. The base film polymer, syndiotactic polystyrene (3), has the following characteristics: low hygroscopicity, excellent thermal stability and high transparency. When used in combination with a UV-blocking coating (5), the sPS film is substantially more discolored by UV light than an unprotected sPS film or a film mainly composed of sPS tree finger containing only an ultraviolet absorber. And resistance to deterioration. The sPS-coated films of the present invention are useful as overcoat films for signage (1) and other outdoor applications and are comparable to acrylic films with added UV absorbers in UV blocking or resistance and have acrylic, polyester, and fluoropolymer overcoats. Offer a cost-effective alternative to film. |