OPTICAL ARTICLE COMPRISING AN ANTI-SMUDGE COATING

摘要

#CMT# #/CMT# Optical article comprises a transparent optical substrate having a main surface and covering the main surface of the substrate, and an anti-fouling coating partially coated with a temporary overlay, where: the anti-fouling coating is obtained by hardening of a polymerizable composition comprises 55-80 wt.%, preferably 60-70 wt.% of a first constituent (A) comprising fluorinated compounds, and 45-20 wt.%, preferably 40-30 wt.% of a second constituent (B) comprising fluorinated linear compounds; and (A) and (B) comprises at least 50%, preferably 60 wt.% of the total coating. #CMT# : #/CMT# Optical article comprises a transparent optical substrate having a main surface and covering the main surface of the substrate, and an anti-fouling coating itself partially coated with a temporary overlay, where: the anti-fouling coating is obtained by hardening of a polymerizable composition comprises 55-80 wt.%, preferably 60-70 wt.% of a first constituent (A) comprising fluorinated compounds, preferably perfluorinated compounds, of which single chain end comprises at least a silanol group or silanol precursor and their mixtures, and 45-20 wt.%, preferably 40-30 wt.% of a second constituent (B) comprising fluorinated linear compounds, preferably perfluorinated compounds, of which two chain ends comprise at least a silanol group or silanol precursor and their mixtures for 100 wt.% of (A) and (B); and (A) and (B) comprises at least 50%, preferably 60 wt.% of the total coating. #CMT#USE : #/CMT# The optical article is useful in ophthalmic lens (claimed). #CMT#ADVANTAGE : #/CMT# The optical article has improved anti-reflective properties. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Components: (A) is a compound or mixture of compounds, preferably linear, with no reactive groups able to be grafted on the surface of the substrate or a functional coating intercalated between the substrate and the anti-fouling layer, other than the silanol groups or silanol precursors with the single chain end. (A) comprises silicon containing compound of formulae (I) or (C3F7-(OCF2CF2CF2)x-O(CF2)2-(CH2C(Y1>)((CH2)m-Si-(R1>)3))p-H) (Ix). (B) is silicon containing compound of formula (X1>m1-Si((R1a)3-m1)-(CH2)a1-O-(CH2)b1-R2F-(CH2)b1-O-(CH2)a1-Si((R1a)3-m1)-Xn1) (II). The anti-fouling coating has a surface energy of = 14 mJ/m2>, preferably = 12 mJ/m2>. The temporary overlay is a mineral layer constituted of metal fluorides and/or metal oxides, preferably polymer material. The temporary overlay has a surface energy of >= 15 mJ/m2>. The optical article comprises one or more functional coatings intercalated between the main substrate and anti-fouling coating. The functional coatings are anti-abrasion and/or anti-scratch coatings, anti-reflective coating and anti-shock primary coatings. The anti-fouling coating is formed directly on anti-abrasion coating or anti-reflective coating. The anti-reflective coating is a multilayer coating of which the most external layer is a base layer of silicon dioxide and anti-fouling coating is formed directly on the external layer of anti-reflective coating. The external layer is constituted of silicon dioxide or its mixture, and aluminum oxide. The temporary overlay was removed. R1F : 1-16C perfluoroalkyl, preferably CF3, C2F5 or C3F7; X : I or H; Y1>H or 1-6C alkyl; Z : F or trifluoromethyl; R1>, X1>hydrolysable group; R2>H or monovalent inactive group; R2F : perfluoropolyether divalent radical; R1a : 1-4C alkyl or phenyl; a-d : 0-200, preferably 1-50; e : 0-1; m : 0-2, preferably 0; p : 1-10; x : 1-50; a10-2, preferably 1; b11-5, preferably 3; and m1, n12-3, preferably 3. #CMT#[Image]#/CMT# #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: (A) and (B) are perfluoropolyethers. #CMT#EXAMPLE : #/CMT# No suitable example given.