| 摘要 |
PURPOSE:To obtain the titled composition outstanding in low shrinkability in its curing, capable of giving molded products with both pigment colorability and surface gloss, by incorporating an unsaturated polyester resin with specified amount of a specific copolymer composition. CONSTITUTION:The objective composition can be obtained by incorporating (A) a composition comprising (i) 20-70wt% of an unsaturated polyester and (ii) 80-30wt% of a monomer copolymerizable therewith (e.g., styrene) with (B) 2-20wt% of a copolymer composition with a number-average molecular weight 40,000-100,000 made by graft polymerization of (iii) a radically polymerizable vinyl monomer to (iv) a block copolymer composition consisting of a) 5-95wt% of polymer block made from 70-100pts.wt. of styrene monomer and 30-0pts.wt. of another monomer copolymerizable therewith (e.g., acrylic acid) and b) 95-5wt% of a second polymer block made from 70-100pts.wt. of vinyl acetate monomer and 30-0pts.wt. of another monomer copolymerizable therewith in the weight ratio (iii)/(iv)=1/1-1/10. Both the monomer (ii) and the copolymer composition B are in nonaqueously dispersed state in the final composition.
|
