Compositions of surface modified nanoparticles

B - Operations – Transporting – 82 – B

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B82B 3/00 (2006.01)

Patent

CA 2751229

Disclosed is a composition comprising: an aqueous dispersion of fluoroalkylsilyl surface modified nanoparticles, wherein the nanoparticles comprise at least one member selected from the group consisting of silica, titania, zirconia, layered magnesium silicate, aluminosilicate, natural clay, synthetic clay and mixtures thereof, and wherein the fluoroalkylsilyl is: (F(CF2)n CH2CH2)m Si(O-)p, where n is 2, 3 or 4, p is 1, 2 or 3, and m is (4- p). Also disclosed are processes of making an aqueous dispersion of fluoroalkylsilyl surface modified nanoparticles, and treating a substrate with an aqueous dispersion of fluoroalkylsilyl surface modified nanoparticles. Articles and substrates comprising the fluoroalkylsilyl surface modified nanoparticles are also disclosed.

La présente invention concerne une composition comprenant : une dispersion aqueuse de nanoparticules à surface modifiée par fluoroalkylsilyle, les nanoparticules comprenant au moins un élément choisi dans le groupe constitué par la silice, le dioxyde de titane, la zircone, le silicate de magnésium stratifié, l'aluminosilicate, l'argile naturelle, l'argile synthétique et des mélanges de ceux-ci, et le fluoroalkylsilyle étant : (F(CF2)nCH2CH2)mSi(O-)p, où n est 2, 3 ou 4, p est 1, 2 ou 3, et m est (4-p). L'invention concerne également des procédés permettant de fabriquer une dispersion aqueuse de nanoparticules à surface modifiée par fluoroalkylsilyle, et de traiter un substrat avec une dispersion aqueuse de nanoparticules à surface modifiée par fluoroalkylsilyle. L'invention concerne également des articles et des substrats comprenant les nanoparticules à surface modifiée par fluoroalkylsilyle.

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