[Problem] To provide a coating composition capable of forming a hard coating on the surfaces of an optical base member such as a plastic lens featuring highly closely adhering property, excellent transparency and excellent scratch resistance. [Means for Solution] The coating composition comprise (a)a fine granular silica having a grain size of not larger than 30 nm; (b) organosilicon compound components containing an epoxy group-containing organosilicon compound (b1) and tetraalkoxysilane (b2)at a mass ratio (b1/b2) of 0.25 to 4.0; (c) water; and (d) a curing catalyst comprising a complex containing aluminum as a core metal, wherein the fine granular silica (a) is contained in an amount of 15 to 55 parts by mass, the water (c) is contained in an amount of 30 to 200 parts by mass and the curing catalyst (d) is contained in an amount of 0.1 to 5. 0 parts by mass per the total amount of the fine granular silica (a) and the organosilicon compound components (b) of 100 parts by mass.
[问题]提供一种涂层组合物,该涂层组合物能够在诸如塑料透镜等光学基件的表面形成硬涂层,具有高度紧密附着性、优异的透明度和优异的抗划伤性。[解决方法] 涂层组合物包括:(a)粒度不大于 30 nm 的细颗粒
白炭黑;(b)
有机硅化合物成分,其中含有环氧基团的
有机硅化合物 (b1) 和四烷氧基
硅烷 (b2),其质量比 (b1/b2) 为 0.25 至 4.其中细颗粒
白炭黑(a)的含量为 15 至 55 份(质量分数),
水(c)的含量为 30 至 200 份(质量分数),固化催化剂(d)的含量为 0.1 至 5.0 份(质量分数),细颗粒
白炭黑(a)和
有机硅化合物组分(b)的总量为 100 份(质量分数)。