| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-guiding element product excellent in fluidity and non-hygroscopicity enabling thin-wall formation at relatively low temperatures, suppressed in the warpage/deformation of the product under high-temperature and high-humidity conditions, and having high light resistance. SOLUTION: A resin composition for the light-guiding element comprises (A) an acrylic copolymer made from 50-75 wt.% of an acrylic monomer and 25-50 wt.% of an aromatic vinyl monomer and having a weight-average molecular weight of 30,000-200,000 and a molecular weight distribution of 2.0-3.0 and (B) an ultraviolet light absorber master batch, wherein the ultraviolet light absorber master batch(B) is a pelletized master batch comprising 50-99 wt.% of the acrylic copolymer(A) and 1-50 wt.% of an ultraviolet light absorber. The light-guiding element product molded using this composition is also provided. COPYRIGHT: (C)2005,JPO&NCIPI
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