Loading patent…
AssigneesNippon Kayaku Kabushiki Kaisha, Nissan Chemical Industries, Ltd.
InventorsShoichi Kaneko, Takeshi Takahashi, Yoshitane Watanabe, Keitaro Suzuki, Osamu Tanegashima, Yoshinari Koyama
Estimating the term…
The present invention provides heat-curable or UV-curable transparent hard coating materials suitable for forming a low refractive antireflection coating on a substrate such as a film or sheet to reduce reflection of external light or increase light transmittance. A UV-curable or heat-curable transparent hard coating material comprising a UV-curable resin having one or more (meth)acryloyl groups in one molecule or a heat-curable resin and silica-magnesium fluoride hydrate composite colloidal particles such that the transparent film obtained by curing said transparent hard coating material has a refractive index of 1.48 or less.
A transparent hard coating material comprising a UV-curable resin having one or more (meth)acryloyl groups in one molecule or a heat-curable resin and silica-magnesium fluoride hydrate composite colloidal particles such that the transparent film obtained by curing said transparent hard coating material has a refractive index of 1.48 or less, and wherein said silica-magnesium fluoride hydrate composite colloidal particles are obtained from a sol of silica-magnesium fluoride hydrate composite colloidal particles having a ratio of silica to magnesium fluoride hydrate (MgF2.nH2O where n is 0.25-0.5) of 0.01-5 in an SiO2/MgF2 weight ratio and a primary particle diameter of 5-50 nm.
Dependencies are inferred from the claim text.