| abstract |
(57) [Object] The present invention provides, for example, the performance required for an automotive lamp reflector base, and has excellent heat resistance and dimensional stability. It is an object of the present invention to provide an unsaturated polyester resin composition having surface smoothness and strength, a cured product comprising the composition, and a lamp reflector base comprising the cured product. SOLUTION: The unsaturated polyester resin is 8 to 20% by weight, 4 to 12% by weight of liquid thermoplastic resin, 8 to 20 of glass fiber % Of an unsaturated polyester resin composition containing 50% to 75% by weight of an inorganic filler. Double bond group concentration 5.10 to 5.90 mmol / g, ether bond group concentration 1.50 to 2.50 mmol / g, isopropylidene bond group concentration 1.05 to 1.30 mmol / g g, ethylene binding group concentration 2.50 to 3.50 mmol / g, and the methyle binding group concentration of 3.20-3.60 mmo 1 / g. |