| 摘要 |
PURPOSE: An unsaturated polyester resin composition is provided to ensure excellent surface smoothness, dimension precision, heat resistance, mechanical strength, coating property and adhesion with a primer layer. CONSTITUTION: An unsaturated polyester resin composition for a lamp reflector comprises (a) unsaturated polyester formed by polycondensing polyhydric alcohol and unsaturated polybasic acid, (b) monomer or prepolymer of diallylphthalate, (c) cross-linking agent consisting of radical-polymerizable monomer excluding diallylphthalate, (d) polystyrene, (e) acrylic polymer, and (f) a low-shrinking agent consisting of a styrene-diene block copolymer and/or hydrogenated material or modified material. |
