Patent ID: 9435923
Filing Date: 2016-09-06
CPC Classification: G02B,Y10T

Claim Text:
1. An infrared shielding film comprising on a substrate at least one unit having: a low refractive index layer that contains first metal oxide particles and a first binder; and a high refractive index layer that is adjacent to the low refractive index layer, contains second metal oxide particles and a second binder, and has a higher refractive index than the low refractive index layer, wherein at least one layer of the low refractive index layer and the high refractive index layer contains, as a binder, at least one of the following (a) to (c): (a) a carboxyvinyl polymer that contains a monomer component, which contains a carboxylic acid, in an amount of 20 to 75% by mass of an entire composition of the carboxyvinyl polymer; (b) a copolymer having pH dependency of viscosity; and (c) a modified polyvinyl alcohol which is a copolymer obtained by copolymerization of (1) a polyvinyl alcohol having an average polymerization degree of 200 to 2400 and (2) at least one type of polymerizable vinyl monomer selected from the group consisting of an unsaturated carboxylic acid, a salt of the unsaturated carboxylic acid, and an ester of the unsaturated carboxylic acid.