Adhesive composition for foldable display, adhesive film using same, and foldable display comprising

1. An adhesive film formed from a curable composition for a foldable display comprising:

a thermocurable resin;

an ionic salt; and

a crosslinking agent,

wherein the adhesive film has a storage modulus of 10 4 Pa to 10 6 Pa at −30° C. and 60° C.,

wherein the adhesive film has a relative dielectric constant of at least 4 at 25° C., 60 RH % and 100 KHz,

wherein the adhesive film has an adhesive strength of 879.4-949.4 gf/in,

wherein the thermocurable resin includes a unit derived from ethylhexyl acrylate and a unit derived from acrylic acid, the unit derived from ethylhexyl acrylate is included in 97 parts by weight to 99 parts by weight; and the unit derived from acrylic acid is included in 1 parts by weight to 3 parts by weight, with respect to 100 parts by weight of the thermocurable resin.

2. The adhesive film composition for a foldable display of claim 1 , wherein the ionic salt is an ionic salt including a cation and an anion.

3. The adhesive film of claim 1 , wherein the thermocurable resin includes a polymer having a weight average molecular weight of 1,000,000 g/mol or greater and less than or equal to 2,000,000 g/mol.

4. The adhesive film of claim 1 , wherein the ionic salt is a metal salt or an organic salt.

5. The adhesive film of claim 2 , wherein the ionic salt comprises a metal-cation.

6. The adhesive film of claim 2 , wherein the anion is represented by Chemical Formula 1:

[X(YO m R f ) n ] −   [Chemical Formula 1]

in the Chemical Formula 1,

X is a nitrogen atom or a carbon atom;

Y is a carbon atom or a sulfur atom;

Rf is a perfluoroalkyl group;

m is 1 or 2, and n is 2 or 3; and

m is 1 when Y is carbon, m is 2 when Y is sulfur, n is 2 when X is nitrogen, and n is 3 when X is carbon.

7. The adhesive film of claim 1 , wherein the thermocurable resin has a glass transition temperature of −70° C. or lower.

8. The adhesive film of claim 1 , wherein the film has a thickness of 10 μm to 50 μm.

9. The adhesive film of claim 1 , wherein the film has a relative dielectric constant of 4 to 20 at 25° C., 60 RH % and 100 KHz.

10. A foldable display comprising the adhesive film of claim 1 .

11. The foldable display of claim 10 , wherein the adhesive film is provided between a cover window and a touch panel, or between a touch panel and a display panel.

12. The adhesive film of claim 4 , wherein the metal salt includes an alkali metal cation or an alkaline earth metal cation.

13. A foldable display comprising the adhesive film of claim 8 .

14. The foldable display of claim 13 , wherein the adhesive film is provided between a cover window and a touch panel, or between a touch panel and a display panel.