[Problem to be Solved]
Provided is a coating composition excellent in antifouling properties, transparency and hydrophilicity and capable of maintaining surface hydrophilicity even at high temperature.
[Solution]
A coating composition containing
(A) a metal oxide particle having a number average particle size of 1 nm to 400 nm, and
(B) a polymer particle,
in which the content of an aqueous-phase component in the component (B), represented by the following expression (I), is 20 mass % or less.
The content of the aqueous-phase component (%)=(dry mass of a filtrate obtained by filtering the component (B) at a molecular cutoff of 50,000)×(100−total mass of solid content)/(mass of the filtrate−dry mass of the filtrate)×100/the total mass of solid content (I).
【待解决问题】提供一种涂层组合物,具有优异的防污性、透明性和亲
水性,并能在高温下维持表面的亲
水性。【解决方案】一种涂层组合物,包含(A)具有平均颗粒大小为1纳米至400纳米的金属氧化物颗粒,和(B)聚合物颗粒,其中(B)组分中
水相组分的含量,由以下公式(I)表示,为20质量%或更少。
水相组分的含量(%)=(在分子截留率为50,000的情况下过滤组分(B)获得的滤液的干质量)×(100-固体含量总质量)/(滤液的质量-滤液的干质量)×100/固体含量总质量。【翻译者注】涂层组合物是指用于表面涂层的材料混合物。