C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 183/02 (2006.01) C08K 3/36 (2006.01) C08K 5/00 (2006.01) C08K 5/5419 (2006.01) C08K 5/5425 (2006.01) C08K 5/5435 (2006.01) C08K 5/548 (2006.01) C09C 1/30 (2006.01) C09D 183/04 (2006.01)
Patent
CA 2740066
A coating composition is provided comprising a) an aqueous dispersion, having a pH of less than 7.5, of silica nanoparticles having average particle diameters of 40 nanometers or less, b) an alkoxysilane oligomer; c) a silane coupling agent, and d) optionally a metal .beta.-diketone complexing agent. The compositions may be used to prepare coated articles wherein the coat-ing is substantially uniform in thickness, durably adheres to the substrate, and provides hydrophilic and/or antireflection surface properties to the substrate.
La présente invention concerne une composition de revêtement comprenant a) une dispersion aqueuse de nanoparticules de silice d'un diamètre moyen de particule inférieur ou égal à 40 nanomètres, présentant un pH inférieur à 7,5, b) un oligomère d'alcoxysilane, c) un agent de pontage silane et, éventuellement, d) un agent complexant à base de ß-dicétone. Ces compositions peuvent être utilisées pour préparer des articles revêtus dont le revêtement est essentiellement uniforme en termes d'épaisseur, qui adhère durablement au substrat et qui lui confère des propriétés hydrophiles et/ou antireflet de surface.
Hager Patrick J.
Jing Naiyong
Schlechte Jay S.
Yorkgitis Elaine M.
3m Innovative Properties Company
Smart & Biggar
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