| 摘要 |
PROBLEM TO BE SOLVED: To obtain an unsaturated polyester resin composition capable of giving a molded article containing a reinforcing fiber material moderately loosened and thoroughly distributed all over the molded article and having excellent water-resistance, hot-water resistance, strength and durability. SOLUTION: This unsaturated polyester resin composition is composed of (a) an unsaturated palyester resin, (b) a vinyl monomer copolymerizable with the resin, (c) a thermoplastic polymer soluble in the vinyl monomer (b), (d) a silane coupling agent (e.g.γ-methacryloxypropyl trimethoxysilane) and (e) a reinforcing fiber (e.g. glass fiber) containing 1-3 wt.% of a binder. The amount of the component (d) is 0.1-15 pts.wt. based on 100 pts.wt. of (a)+(b)+(c).
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