A primer coating composition is provided for an optical article capable of forming a coating layer having excellent impact resistance, abrasion resistance, and adhesion to various kinds of plastic materials without occurring of appearance faulty for an optical base material, for example, a plastic lens for an eyeglass. A primer composition for an optical article comprises; (A) aqueous dispersion of urethane resin having a polycarbonate-derived skeleton and the elongation of 200 ∼ 1000%; (B) an organic solvent having 3 ∼ 9 carbon atoms and having an ether bond or carbonyl bond and one hydroxyl group in a molecule; and (C) lower alcohol having 1 ∼ 4 carbon atoms, wherein the weight ratio of said organic solvent to said lower alcohol is from 0.01 to less than 2.00.
提供了一种用于光学产品的底涂层组合物,该组合物能够形成对各种塑料材料具有优异抗冲击性、耐磨性和附着力的涂层,而不会使光学基底材料(例如眼镜的塑料镜片)出现外观缺陷。用于光学产品的底层涂料组合物包括:(A) 具有聚
碳酸酯衍生骨架且伸长率为 200 ∼ 1000% 的聚
氨酯
树脂的
水分散液;(B) 具有 3 ∼ 9 个碳原子且分子中具有一个醚键或羰基键和一个羟基的有机溶剂;以及 (C) 具有 1 ∼ 4 个碳原子的低级醇,其中所述有机溶剂与所述低级醇的重量比为 0.01 至小于 2.00。