| 摘要 |
PURPOSE:To obtain a composition rapidly hardenable on a resin product to give a coating film having excellent hardenss, abrasion resistance, flexibility, weather resistance, etc., by adding a photo-stabilizer and an antioxidant to a mixture of a specific polyester acrylate and a specific polyfunctional monomer. CONSTITUTION:The objective composition can be produced by compounding (A) 100pts.wt. of a mixture consisting of (i) 20-75pts. of a polyfunctional monomer obtained by substituting >=3 hydroxyl groups of a polyhydric alcohol having >=4 hydroxyl groups in a molecule with acryloyloxy groups, (ii) 10-60pts. of a polyester acrylate produced by he co-esterification of dipentaerythritol, tripentaerythritol, ditrimethylolpropane or ditrimethylolethane with a dicarboxylic acid and acrylic acid and (iii) 0-40pts. of a mono- or diacrylic acid ester having a boiling point of >=150 deg.C and a viscosity of <=10cps with (B) 0.01-5pts. of a cyclic hindered amine photo-stabilizer and (C) 0.01-5pts. of an antioxidant. The composition is mixed with a photo-sensitizer, applied to a resin article and irradiated with ultraviolet ray to form a cured coating film on the article.
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