| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light diffusion plate which suffers from less degradation caused by UV light. <P>SOLUTION: The light diffusion plate (10) comprises layers of a light diffusion layer (11) made of a transparent resin selected from styrene polymers and styrene monomer-methyl methacylate copolymers containing a light diffusion agent dispersed therein, and a UV absorbing layer (12) made of a styrene monomer-methyl methacrylate copolymer containing 0.05 to 10 parts by mass of a UV absorbing agent such as 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]phenol per 100 parts by mass of the copolymer. The UV absorbing layer (12) is 10 to 100 μm thick, and the multilayered light diffusion plate (10) is 1 mm to 3 mm thick. <P>COPYRIGHT: (C)2008,JPO&INPIT |
