Hard coating film, composition for hard coating film, polarizing plate including the same, and liquid crystal display including the same
A hard coating film may include a cured product of a polyester polyol modified hyperbranched (meth)acrylate represented by Formula 1:
1. A hard coating film, comprising:
a cured product of a polyester polyol modified hyperbranched (meth)acrylate represented by Formula 1:
wherein, in Formula 1:
P is a C 2 -C 50 polyester,
E is a divalent ester moiety,
Q 1 , Q 2 , Q 3 , and Q 4 are each independently selected from the group of a C 2 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon,
m, n, p, q, r, s, t, and w are each independently an integer from 1 to 10, and
R, R′, R″, and R″' are each independently selected from the group of hydrogen and a C 1 -C 5 alkyl group,
wherein film curling of the hard coating film is from 0 to about 20 mm when the hard coating film has a thickness of about 2 μm to about 30 μm, and is stacked on a base film having a thickness of about 40 μm or less, and
wherein about 10 wt % to about 30 wt % of the hard coating film is from the polyester polyol modified hyperbranched (meth)acrylate.
2. The hard coating film as claimed in claim 1 , wherein the polyester polyol modified hyperbranched (meth)acrylate has a weight average molecular weight of about 2000 g/mol to about 3000 g/mol.
3. The hard coating film as claimed in claim 1 , wherein the polyester polyol modified hyperbranched (meth)acrylate is represented by Formula 2:
wherein, in Formula 2, x, y, and z are each independently an integer from 0 to 5, with the proviso that x +y +z >0.
4. The hard coating film as claimed in claim 1 , wherein the hard coating film is formed of a composition, the composition including:
the polyester polyol modified hyperbranched (meth)acrylate;
a hyperbranched (meth)acrylate oligomer represented by Formula 3;
reactive nanoparticles;
a polyfunctional monomer; and
a photopolymerization initiator,
wherein, in Formula 3:
the core is selected from the group of a C 3 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon,
R 1 , R 1 ′, R 1 ″, R 1 ″', R 2 , and R 2 ′ are each independently selected from the group of a C 1 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon, and
E is a divalent ester moiety.
5. The hard coating film as claimed in claim 4 , wherein, in Formula 3, at least one selected from the group of the core, R 1 , R 1 ′, R 1 ″, R 1 ″', R 2 , and R 2 ′ includes at least one heteroatom.
6. The hard coating film as claimed in claim 4 , wherein the hyperbranched (meth)acrylate oligomer has a weight average molecular weight of about 5000 g/mol to about 10,000 g/mol.
7. The hard coating film as claimed in claim 4 , wherein the reactive nanoparticles have an average particle diameter of about 10 nm to about 100 nm.
8. The hard coating film as claimed in claim 4 , wherein the reactive nanoparticles include inorganic nanoparticles, and about 3% to about 50% of a surface area of the inorganic nanoparticles is surface-treated with a (meth)acrylate compound.
9. The hard coating film as claimed in claim 8 , wherein the inorganic nanoparticles include at least one selected from the group of SiO 2 , Al 2 O 3 , CaCO 3 , and TiO 2 .
10. The hard coating film as claimed in claim 4 , wherein the polyfunctional monomer includes at least one selected from the group of a hydroxyl group-containing polyfunctional (meth)acrylate compound and a fluorine modified polyfunctional (meth)acrylate compound.
11. The hard coating film as claimed in claim 4 , wherein the composition includes:
about 10 wt % to about 30 wt % of the polyester polyol modified hyperbranched (meth)acrylate,
about 15 wt % to about 60 wt % of the hyperbranched (meth)acrylate oligomer,
about 5 wt % to about 60 wt % of the reactive nanoparticles,
about 1 wt % to about 40 wt % of the polyfunctional monomer, and
about 1 phr by weight to about 10 phr by weight of the photopolymerization initiator, based on a total weight of the polyester polyol modified hyperbranched (meth)acrylate, the hyperbranched (meth)acrylate oligomer, the reactive nanoparticles, and the polyfunctional monomer.
12. The hard coating film as claimed in claim 4 , wherein the composition further includes a reactive fluorine compound.
13. The hard coating film as claimed in claim 12 , wherein the reactive fluorine compound is represented by Formula 4:
Ar—Rf—Ar, [Formula 4]
wherein, in Formula 4:
Ar is CH 2 =CR 3 COO,
R 3 is selected from the group of a hydrogen atom and a C 1 -C 3 alkyl group,
Rf is a perfluoroalkylene group having a structure represented by one selected from the group of Formulae 5-A, 5-B, 5-C, 5-D, and 5-E:
* is a bonding site for Ar,
R F1 is a straight or branched C 1 -C 10 perfluoroalkylene group, and
R F2 , R F3 , R F4 , and R F5 each independently are H, a straight or branched C 1 -C 14 perfluoroalkyl group.
14. The hard coating film as claimed in claim 12 , wherein the reactive fluorine compound is present in an amount of about 0.01 parts by weight to about 5 parts by weight, based on 100 parts by weight of the composition.
15. A composition for hard coating films, comprising:
a polyester polyol modified hyperbranched (meth)acrylate represented by Formula 1;
a hyperbranched (meth)acrylate oligomer represented by Formula 3;
reactive nanoparticles;
a polyfunctional monomer; and
a photopolymerization initiator:
wherein, in Formula 1,
P is a C 2 -C 50 polyester,
E is a divalent ester moiety,
Q 1 , Q 2l, Q 3 , and Q 4 are each independently selected from the group of a C 2 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon,
m, n, p, q, r, s, t, and w are each independently an integer from 1 to 10, and
R, R′, R″, and R″' are each independently selected from the group of hydrogen and a C 1 -C 5 alkyl group,
wherein, in Formula 3:
the core is selected from the group of a C 3 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon,
R 1 , R 1 ′, R 1 ″, R 1 ″', R 2 , and R 2 ′ are each independently selected from the group of a C 1 -C 50 aliphatic hydrocarbon and a C 6 -C 50 aromatic hydrocarbon, and
E is a divalent ester moiety.
16. The composition as claimed in claim 15 , wherein the composition includes:
about 10 wt % to about 30 wt % of the polyester polyol modified hyperbranched (meth)acrylate,
about 15 wt % to about 60 wt % of the hyperbranched (meth)acrylate oligomer,
about 5 wt % to about 60 wt % of the reactive nanoparticles,
about 1 wt % to about 40 wt % of the polyfunctional monomer, and
about 1 phr by weight to about 10 phr by weight of the photopolymerization initiator, based on a total weight of the polyester polyol modified hyperbranched (meth)acrylate, the hyperbranched (meth)acrylate oligomer, the reactive nanoparticles, and the polyfunctional monomer.
17. The composition as claimed in claim 15 , further comprising a reactive fluorine compound.
18. A polarizing plate, comprising:
a polarizer;
a base film on at least one surface of the polarizer; and
the hard coating film as claimed in claim 1 .
19. A liquid crystal display, comprising the polarizing plate as claimed in claim 18 .