Composition for forming a hard coating layer having excellent anti-fouling property
Provided is a composition for forming a hard coating layer including about 0.1 wt % to about 15 wt % of a polysilazane, about 55 wt % to about 94.6 wt % of a reactive solvent containing hydroxyl group, about 5 wt % to about 20 wt % of a titanium dioxide (TiO 2 ), and about 0.3 wt % to about 10 wt % of a zirconia (ZrO 2 ). The composition provides a hard coating film which has excellent anti-fouling and superhydrophilicity, scratch resistance, abrasion resistance, antimicrobial property, weatherability, and a method for manufacturing the same which allow non-vacuum wet coating, thereby shortening fabrication time and providing excellent processability.
1. A composition for forming a hard coating layer, comprising:
about 2 wt % of a polysilazane;
about 87.5 wt % of a reactive solvent containing hydroxyl group;
about 10 wt % of a titanium dioxide (TiO 2 ); and
about 0.5 wt % of a zirconia (ZrO 2 ).
2. The composition for forming a hard coating layer according to claim 1 ,
the polysilazane includes a silicon-nitrogen (Si—N) bond unit represented by Chemical Formula 1:
wherein, in Chemical Formula 1,
R 1 to R 3 may each independently be hydrogen, a substituted or unsubstituted C 1 to C 30 alkyl group, a substituted or unsubstituted C 3 to C 30 cycloalkyl group, a substituted or unsubstituted C 6 to C 30 aryl group, a substituted or unsubstituted C 7 to C 30 arylalkyl group, a substituted or unsubstituted C 1 to C 30 heteroalkyl group, a substituted or unsubstituted C 2 to C 30 heterocycloalkyl group, a substituted or unsubstituted C 2 to C 30 alkenyl group, a substituted or unsubstituted alkoxy group, a carboxyl group, an aldehyde group, a hydroxy group, or a combination thereof.
3. The composition for forming a hard coating layer according to claim 1 ,
wherein the reactive solvent containing hydroxyl group is an alcohol-based solvent, a silanol-based solvent, an alkoxysilane-based solvent, or a combination thereof.
4. The composition for forming a hard coating layer according to claim 3 ,
wherein the reactive group-containing reactive solvent comprises ethanol and tetraethoxysilane (TEOS), and
wherein the weight ratio of ethanol to tetraethoxysilane (TEOS) is about 1:0.001 to about 1:0.5.
5. The composition for forming a hard coating layer according to claim 1 ,
the titanium dioxide (TiO 2 ) has an average particle diameter (D50) of about 8 nm to 15 nm, and
the zirconia (ZrO 2 ) has an average particle diameter (D50) of about 10 nm to 25 nm.
6. A hard coating film comprising:
a substrate; and a hard coating layer formed on the substrate,
wherein the hard coating layer is formed from the composition of claims 1 ,
wherein the hard coating layer has a thickness from about 300 nm to about 800 nm.
7. The hard coating film according to claim 6 ,
wherein the hard coating film has a pencil hardness from about 7H to about 9H, and has a water contact angle of 5° or less.
8. The hard coating film according to claim 7 ,
wherein the hard coating film has a color difference value (ΔE) of 0.3 or less as measured in accordance with ASTM D-4587.