Antisoiling coatings for antireflective surfaces and methods...

C - Chemistry – Metallurgy – 08 – J

Patent

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88/115, 117/143

C08J 7/04 (2006.01) B05D 5/06 (2006.01) C03C 17/42 (2006.01) C09D 4/00 (2006.01) G02B 1/11 (2006.01)

Patent

CA 2295542

An antisoiling coating for an antireflective surface, particularly the outer surface of an antireflective film stack, wherein the antisoiling coating includes a fluorinated siloxane, preferably prepared by applying a coating composition of a fluorinated silane of the following formula: R f- R1 - SiX3-xR2x wherein: R f is a perfluorinated group optionally containing one or more heteroatoms; R1 is a divalent alkylene group, arylene group, or mixture thereof, substituted with one or more heteroatoms or functional groups, containing about 2 to about 16 carbon atoms; R2 is a lower alkyl group; X is a halide, a lower alkoxy goup, or an acyloxy group; and x is 0 or 1.

L'invention a trait à un enduit anti-salissure pour surface antiréfléchissante, notamment la face externe d'un empilement de films antiréfléchissants, comportant un siloxane fluoré, préparé, de préférence, par application d'une composition d'enduction d'un silane fluoré correspondant à la formule suivante: Rf - R<1> - SiX3-xR<2>x<. Dans cette formule, R>f< représente un groupe perfluoré renfermant, éventuellement, un ou plusieurs hétéroatomes, R?1> représente un groupe alcène bivalent, un groupe arylène ou leur mélange, substitué par un ou plusieurs hétéroatomes ou groupes fonctionnels, contenant d'environ 2 à environ 16 atomes de carbone, R<2> représente un groupe alkyle de faible poids moléculaire, X représente un halogénure, un groupe alcoxy de faible poids moléculaire ou un groupe acyloxy et x vaut 0 ou 1.

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