| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical molded item that exhibits good transparency, hues and impact resistance, is hardly deformed by moisture absorption and has a small birefringence. <P>SOLUTION: The optical molded item is obtained by using a resin composition that comprises a copolymer resin as a main component, which is obtained by bulk continuous polymerization of a styrene monomer and a (meth)acrylic ester monomer in the presence of a butadiene rubber and has a ratio of constituting monomers of 10-38 mass% of a styrene monomer unit, 5-18 mass% of a butadiene monomer unit and 85-44 mass% of a (meth)acrylic ester monomer unit, and a heat-resistant stabilizer. <P>COPYRIGHT: (C)2007,JPO&INPIT |
