Patent ID: 8709582
Filing Date: 2014-04-29
Classification: C08K,C09D,C23C,G02B,Y10T

Abstract:
1. An optical article comprising a substrate and on at least one face of the substrate a multilayered antireflecting coating functioning in an interferential manner having antifog properties, said antireflecting coating providing to said face of the substrate a reflectance Rv less than 2.5%, said antireflecting coating including a last layer with a refractive index n≦1.55 and a physical thickness of 120 nm or less directly deposited on a high refractive index layer (HI layer) having a refractive index n>1.55, and a thickness of less than 500 nm, wherein: (a) the last layer comprises a layer-by-layer (LbL) coating exposed to the environment; (b) the LbL coating consists in multiple bilayers with at least two bilayers, each bilayer being formed by successively: (c) the LbL coating is cross-linked through chemical linkages between said NH