INTERLAYER FOR LAMINATED GLASS SCREENING LIGHT RAY OF SHORT WAVELENGTH

摘要

PURPOSE:To obtain the title interlayer capable of selectively screening light rays of short wavelength such as ultraviolet light comprising a plasticized polyvinyl butyral resin containing a light absorber consisting of a benzotriazole derivative and finely particulate inorganic substance having a specific range of particle diameter. CONSTITUTION:The interlayer comprises a plasticized polyvinyl butyral resin containing one or more light absorbers consisting of benzotriazole derivatives shown by formula I and formula II and finely particulate inorganic substance having a particle size distribution of >=90wt.% particles with 250-400nm particle diameter. A compound shown by formula Ia may be cited as the compound shown by formula I and a compound shown by formula IIa as the compound shown by formula II. Fine particles such as Al, Al2O3 or SiO2 may be cited as the finely particulate inorganic substance. The interlayer does not require specific blending and specific surface processing technology like specific blended glass or specific surface processed glass and is inexpensively and readily freely processed. The interlayer can selectively absorb and screen light rays having <=400nm short wavelength.