Adhesive composition and display apparatus including the same

1 . An adhesive composition comprising:

(meth)acrylate having a glass transition temperature of 40° C. or less;

(meth)acrylate having an alicyclic group;

cross-linkable (meth)acrylate;

(meth)acrylate having a hydroxyl group; and

reactive dilution monomer,

wherein a cured product of the adhesive composition has an elastic modulus of about 50,000 Pa or greater at a temperature of 60° C.,

wherein the (meth)acrylate having the hydroxyl group is included at a content of 10 wt % to 20 wt %, and

wherein the reactive dilution monomer is included at a content of about 3 wt % to about 10 wt %.

2 . The adhesive composition of claim 1 , wherein the (meth)acrylate having the glass transition temperature of 40° C. or less is included at a content of about 35 wt % to about 45 wt %.

3 . The adhesive composition of claim 1 , wherein the (meth)acrylate having the alicyclic group is included at a content of about 15 wt % to about 25 wt %.

4 . The adhesive composition of claim 1 , wherein the cross-linkable (meth)acrylate is included at a content of about 15 wt % to about 25 wt %.

5 . The adhesive composition of claim 1 , wherein the (meth)acrylate having the hydroxyl group comprises 2-hydroxyethyl (meth)acrylate.

6 . The adhesive composition of claim 1 , wherein the reactive dilution monomer comprises (meth)acrylic acid.

7 . The adhesive composition of claim 1 , wherein

the adhesive composition further comprises a photopolymerization initiator, and

the photopolymerization initiator comprises 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

8 . The adhesive composition of claim 1 , wherein a maximum value of time-varying stress of the cured product of the adhesive composition is about 10,000 Pa or less when a strain of 25% is applied thereto at a temperature of 70° C.

9 . A display apparatus comprising:

a display panel;

a cover window disposed over the display panel; and

an adhesive layer disposed between the display panel and the cover window,

wherein the adhesive layer comprises a cured product of an adhesive composition comprising:

(meth)acrylate having a glass transition temperature of 40° C. or less;

(meth)acrylate having an alicyclic group;

cross-linkable (meth)acrylate;

(meth)acrylate having a hydroxyl group; and

reactive dilution monomer,

wherein the adhesive layer has an elastic modulus of about 50,000 Pa or greater at a temperature of 60° C.,

wherein the (meth)acrylate having the hydroxyl group is included at a content of 10 wt % to 20 wt %, and

wherein the reactive dilution monomer is included at a content of about 3 wt % to about 10 wt %.

10 . The display apparatus of claim 9 , wherein

the display apparatus includes a bending area which is at least partially bent, and

the display panel and the cover window corresponding to the bending area are bent.

11 . The display apparatus of claim 9 , wherein the (meth)acrylate having the glass transition temperature of 40° C. or less is included at a content of about 35 wt % to about 45 wt %.

12 . The display apparatus of claim 9 , wherein the (meth)acrylate having the alicyclic group is included at a content of about 15 wt % to about 25 wt %.

13 . The display apparatus of claim 9 , wherein the cross-linkable (meth)acrylate is included at a content of about 15 wt % to about 25 wt %.

14 . The display apparatus of claim 9 , wherein the (meth)acrylate having the hydroxyl group comprises 2-hydroxyethyl (meth)acrylate.

15 . The display apparatus of claim 9 , wherein

the adhesive composition further comprises a photopolymerization initiator, and

the photopolymerization initiator comprises 2-hydroxy-2-methyl-1-phenyl-propan-1-one.

16 . The display apparatus of claim 9 , wherein a maximum value of time-varying stress of the adhesive layer is about 10,000 Pa or less when a strain of 25% is applied thereto at a temperature of 70° C.