Patent ID: 9605159
Date: 2017-03-28
CPC Classifications: C08K,C09D

Claim:
1. A low refractive index film-forming composition comprising: a hydrolysate of fluoroalkyl group-containing silicon alkoxide (B) represented by the following formula (2) and silicon alkoxide (A) represented by the following formula (1); and silica sol (F) including beaded colloidal silica particles, wherein a mass ratio of silicon alkoxide (A) to silicon alkoxide (B) is 1:0.6 to 1:1.6 (A:B), a content of SiO a plurality of spherical colloidal silica particles which is contained in the beaded colloidal silica particles having an average particle size of 5 nm to 50 nm which is measured with a BET method, the plurality of spherical colloidal silica particles are linked to each other through metal oxide-containing silica in the beaded colloidal silica particles, a ratio D the average particle size D the spherical colloidal silica particles are linked to one plane: wherein R represents an alkyl group having 1 to 5 carbon atoms; wherein R