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US 11,692,108 B2Granted
Composition for forming hard coating layer, preparation method of hard coating film, and hard coating film prepared using the same
AssigneesSK Innovation Co., Ltd., SK ie technology Co., Ltd.
InventorsJong Nam Ahn, Byoung Sun Ko, Jin Su Park, Tae Sug Jang, Ho Chul Yoon
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Abstract
Provided is a composition for forming a hard coating layer, which includes an epoxy siloxane resin, a crosslinking agent including a compound having an alicyclic epoxy group, a thermal initiator including a compound represented by a specific chemical formula, a photoinitiator, a fluorine-substituted (meth)acrylate compound, and silica nanoparticles surface-modified with a fluorine compound, and forms a hard coating layer having excellent hardness and antifouling property and suppressing curling.
Claims4
A hard coating film comprising:
- a substrate;
- and
- a cured hard coating layer formed on the substrate by curing a composition including an epoxy siloxane resin, a crosslinking agent including a compound having an alicyclic epoxy group, a fluorine-substituted (meth)acrylate compound, silica nanoparticles surface-modified with a fluorine compound, a cationic thermal initiator a photo-cationic initiator, a compound in which a linear siloxane compound is substituted by an epoxy group, and a solvent,
- wherein the epoxy siloxane resin is included at 20 to 30 parts by weight, based on 100 parts by weight of the entire composition,
- wherein the fluorine-substituted (meth)acrylate compound is included at 0.3 to 15 parts by weight, based on 100 parts by weight of the entire composition,
- wherein the silica nanoparticles surface-modified with a fluorine compound selected from an alkoxysilane having a fluorine-substituted alkyl group, a fluorine-modified polysilazane and a fluorine substituted alkyl halide is included at 6 to 15 parts by weight, based on 100 parts by weight of the entire composition,
- wherein the cationic thermal initiator is included at 0.3 to 10 parts by weight, and the photo-cationic initiator is included at 0.3 to 10 parts by weight, based on 100 parts by weight of the entire composition,
- wherein the contents of the crosslinking agent and the silica nanoparticles surface-modified with the fluorine compound are same as each other in the composition,
- wherein the contents of the cationic thermal initiator and the photo-cationic initiator are same as each other in the composition,
- wherein the solvent is included at 16.7 to 43.7 parts by weight, based on 100 parts by weight of the entire composition,
- wherein the cured hard coating layer has a water contact angle of 100° or more and a pencil hardness of 6H to 8H, and
- wherein the hard coating film has a curl amount of 5 mm or less, in which the curl amount is measured at each vertex of a square sample cut so that the length of each side is 10 cm and each side is inclined at an angle of 45° to an MD direction of the film, the curl amount is measured under constant temperature condition of 25° C. and constant humidity condition of 50%, and the curl amount refers to a vertical height from the lowest position to the vertex of the film.
9 more elements
Dependencies are inferred from the claim text.