Ink composition
The present application relates to an ink composition comprising a glycidyl ether compound and a method for forming an organic layer using the same, and provides an ink composition capable of forming an organic layer and adjusting haze in a curing process for an intended use, and a method of forming an organic layer using the same.
1. An ink composition comprising a glycidyl ether compound in an amount of 7 to 38 wt % of the total composition,
wherein haze of the ink composition is adjusted by UV irradiation, and
wherein the haze of the ink composition is increased by increasing UV light quantity.
2. The ink composition according to claim 1 , wherein a haze value for the ink composition at a time point f after being irradiated with UV rays at a UV light quantity of 7600 mJ/cm 2 or more from a random time point i is larger than a haze value for the ink composition at the time point i.
3. The ink composition according to claim 1 , wherein a haze value H 300 upon irradiation at a light quantity of 300 mJ/cm 2 is smaller than a haze value H 8000 upon irradiation at a light quantity of 8000 mJ/cm 2 .
4. The ink composition according to claim 1 , further comprising an epoxy compound having cyclic structures.
5. The ink composition according to claim 4 , wherein the epoxy compound having cyclic structures is at least bifunctional.
6. The ink composition according to claim 4 , wherein the epoxy compound having cyclic structures has three to ten constituent atoms of a ring.
7. The ink composition according to claim 4 , wherein the epoxy compound having cyclic structures is included in an amount of 40 to 150 parts by weight relative to 100 parts by weight of the glycidyl ether compound.
8. The ink composition according to claim 1 , further comprising a compound having an oxetane group.
9. The ink composition according to claim 8 , wherein the compound having an oxetane group has a weight average molecular weight in a range of 150 to 1,000 g/mol.
10. The ink composition according to claim 8 , wherein the compound having an oxetane group is included in an amount of 150 to 300 parts by weight relative to 100 parts by weight of the glycidyl ether compound.
11. The ink composition according to claim 1 , further comprising a photoinitiator.
12. The ink composition according to claim 1 , wherein the composition is solventless.
13. The ink composition according to claim 1 , wherein the haze value measured according to JIS K7105 standard in cured state is in a range of 0.1 to 50%.
14. The ink composition according to claim 1 , wherein the composition is applied to an encapsulating layer of an organic electronic element or a light extraction layer of an organic electronic element.
15. The ink composition according to claim 3 , wherein the ratio (H 8000 /H 300 ) of the H 8000 haze value to the H 300 haze value is in a range of 15 to 100.
16. A method for forming an organic layer comprising irradiating the ink composition of claim 1 with UV rays.
17. The method for forming an organic layer according to claim 16 , wherein the UV rays have a light quantity in a range of 20 mJ/cm 2 to 15,000 mJ/cm 2 .
18. The ink composition according to claim 1 , wherein the glycidyl ether compound includes aliphatic glycidyl ether, benzyl glycidyl ether, 1,4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, propylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, n-butyl glycidyl ether, 2-ethylhexyl glycidyl ether, or neopentyl glycol diglycidyl ether.