[Abstract] To provide a coating composition capable of forming a hard coat layer having excellent transparency and scratch resistance on the surface of an optical resin substrate such as a plastic lens, and exhibiting long-term storage stability.
[Means for Solution] The coating composition comprises (A) a fine particulate composite metal oxide, (B') a hydrolyzed product obtained by the hydrolysis of (B) a hydrolyzable organosilicon compound containing (B1) an organosilicon compound that has an epoxy group, such as γ-glycidoxypropyltrimethoxysilane, (C) water, (D1) a low-boiling lowly viscous alcohol having not more than 3 carbon atoms, such as methanol or ethanol, (D2) a low-boiling highly viscous alcohol such as t-butanol, (D3) a high-boiling organic solvent having a boiling point of 150°C to 200°C, such as diacetone alcohol, and (E) a curing catalyst such as tris(2,4-pentanedionato)aluminum(III), the mass ratio (D1/C) of the component (D1) and the component (C) being in a range of 1.80 to 7.00, the mass ratio (D2/C) of the component (D2) and the component (C) being in a range of 0.24 to 2.50, and the mass ratio (D3/C) of the component (D3) and the component (C) being in a range of 1.10 to 4.40.
[摘要] 提供一种涂层组合物,该涂层组合物能够在塑料透镜等光学
树脂基材表面形成具有优异透明度和抗划伤性的硬涂层,并具有长期储存稳定性。
[解决方法] 涂层组合物包括 (A) 细颗粒复合金属氧化物;(B') 由 (B) 可
水解
有机硅化合物水解得到的
水解产物,该
有机硅化合物含有 (B1) 具有环氧基团的
有机硅化合物,如 γ-
缩水甘油氧丙基
三甲氧基硅烷;(C)
水;(D1) 具有不超过 3 个碳原子的低沸点低粘度醇、(D3) 沸点为 150°C 至 200°C 的高沸点有机溶剂,如
二丙酮醇,以及 (E) 固化催化剂,如三(
2,4-戊二酮酸)铝(III),组分 (D1) 和组分 (C) 的质量比 (D1/C) 在 1.80至7.00,组分(D2)和组分(C)的质量比(D2/C)在0.24至2.50之间,组分(D3)和组分(C)的质量比(D3/C)在1.10至4.40之间。