Resin composition, adhesive member, and display device including the same
A resin composition includes a first (meth)acrylic resin having a weight average molecular weight of about 500 or less, a second (meth)acrylic resin having a weight average molecular weight of about 6,000 or more, a radical polymerization initiator, and a polyrotaxane compound, where the resin composition has a viscosity in a range of about 1.0 mPa·s to about 100 mPa·s at 25° C.
1. A resin composition comprising:
a first (meth)acrylic resin having a weight average molecular weight of about 500 or less; where the first (meth)acrylic resin consists of at least one selected from 2-ethylhexylacrylate, 4-hydroxybutyl acrylate, n-butyl(meth)acrylate, i-butyl(meth)acrylate, t-butyl(meth)acrylate, isooctyl(meth)acrylate, isodecyl(meth)acrylate, lauryl(meth)acrylate, stearyl(meth)acrylate, and isostearyl(meth)acrylate;
a second (meth)acrylic resin having a weight average molecular weight of about 6,000 or more;
a radical polymerization initiator; and
a polyrotaxane compound,
wherein the resin composition has a viscosity in a range of about 1.0 mPa·s to about 100 mPa·s at 25° C.; wherein a content of the second (meth)acrylic resin is in a range of about 5 wt % to about 15 wt % with respect to the total content of 100 wt % of the first (meth)acrylic resin and the second (meth)acrylic resin.
2. The resin composition of claim 1 , wherein the resin composition satisfies the following formula: 0.9<A/B<4,
wherein
A denotes a storage modulus at 25° C. after ultraviolet-curing of the resin composition, and
B denotes a storage modulus at 60° C. after ultraviolet-curing of the resin composition.
3. The resin composition of claim 1 , wherein the resin composition further comprises an organic solvent in an amount of about 0 wt % to about 1 wt %.
4. The resin composition of claim 1 , wherein the polyrotaxane compound has a radical curable group on a side chain thereof.
5. The resin composition of claim 4 , wherein the radical curable group is an acrylate group or a methacrylate group.
6. The resin composition of claim 1 , wherein the radical polymerization initiator comprises a self-cleavage type radical polymerization initiator and a hydrogen drawing type radical polymerization initiator.
7. The resin composition of claim 1 , wherein a content of the radical polymerization initiator is in a range of about 0.5 wt % to about 5 wt %.
8. The resin composition of claim 1 , wherein a content of the polyrotaxane compound is in a range of about 1 wt % to about 10 wt %.
9. An adhesive member comprising the resin composition of claim 1 .
10. The adhesive member of claim 9 , wherein the adhesive member satisfies the following formula: 0.9<A′/B′<4,
wherein
A′ denotes a storage modulus of the adhesive member at 25° C., and
B′ denotes a storage modulus of the adhesive member at 60° C.
11. The adhesive member of claim 9 , wherein the resin composition is an inkjet printing composition.
12. A display device comprising:
a display panel;
a window disposed on the display panel; and
an adhesive member disposed between the display panel and the window,
wherein the adhesive member comprises the resin composition of claim 1 .
13. The display device of claim 12 , wherein a thickness of the adhesive member is in a range of about 20 μm to about 200 μm.
14. The display device of claim 12 , wherein the adhesive member is defined by a layer formed by directly providing the resin composition on one surface of the display panel and ultraviolet-curing the provided resin composition.
15. The display device of claim 12 , wherein
a folding area is defined in the display device, and
the folding area has a radius of curvature of about 5 mm or less.
16. The display device of claim 12 , wherein the adhesive member satisfies the following formula: 0.9<A′/B′<4,
wherein
A′ denotes a storage modulus of the adhesive member at 25° C., and
B′ denotes a storage modulus of the adhesive member at 60° C.
17. The display device of claim 12 , wherein the resin composition further comprises an organic solvent in an amount of about 0 wt % to about 1 wt %.
18. The display device of claim 12 , further comprising:
a light control layer disposed between the adhesive member and the window; and
an optical adhesive layer disposed between the light control layer and the window,
wherein the optical adhesive layer comprises a polymer derived from the resin composition.
19. The display device of claim 18 , wherein the light control layer is a polarizing plate or a color filter layer.