| 摘要 |
PROBLEM TO BE SOLVED: To provide an unsaturated polyester resin composition which has the extremely low shrinkage at curing, while securing a thermal conductivity of 1.0 W/m×K or more. SOLUTION: The unsaturated polyester resin composition comprises an unsaturated polyester resin, a crosslinker, a shrinkage-lowering agent, an inorganic filler having a thermal conductivity of 20-250 W/m×K and a glass fiber, and is characterized in that the above shrinkage-lowering agent is a styrene-vinyl acetate block copolymer. The styrene-vinyl acetate block copolymer has preferably a mole ratio of styrene to vinyl acetate of from 90:10 to 40:60. COPYRIGHT: (C)2009,JPO&INPIT
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