| 摘要 |
PURPOSE:To produce a marble-like product excellent in transparency and moldability by pressure molding though an unsaturated polyester resin is used as a base layer. CONSTITUTION:After the surface of a lower mold is coated with a resin for a gel coat layer, a compd. prepared by adding an allyl type prepolymer to an unsaturated polyester resin is applied to the coated surface of the lower mold through a glass fiber mat if necessary and subjected to compression molding under such a condition that thermal molding temp. is 60-120 deg.C and compression pressure is 2-200kg/cm<2> by an upper mold to be cured. By the use of the allyl type prepolymer, the contraction of a resin is prevented and the moldability thereof is enhanced. |
