Adhesive composition and optical member
A photocationically polymerizable adhesive composition and an optical member, the photocationically polymerizable adhesive composition including about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds, about 0.1 to about 5 parts by weight of a titanate coupling agent, and about 0.1 to about 20 parts by weight of a photopolymerization initiator, wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.
1. A photocationically polymerizable adhesive composition having a viscosity at 25° C. of about 200 mPa·s or less, comprising
about 75 to about 99.8 parts by weight of a compound including one of aliphatic epoxy, alicyclic epoxy, oxetane, and vinyl ether compounds,
about 0.1 to about 5 parts by weight of a titanate coupling agent, and
about 0.1 to about 20 parts by weight of a photopolymerization initiator,
wherein a sum of weights of the compound, the titanate coupling agent, and the photopolymerization initiator is 100 parts by weight.
2. The photocationically polymerizable adhesive composition as claimed in claim 1 , wherein the titanate coupling agent is:
a compound represented by Formula (1):
in Formula (1), R 1 , R 2 , R 3 , and R 4 are each independently a group including one of
or two of R 1 , R 2 , R 3 , and R 4 are connected to form a ring structure including one of
a dimer of the compound of Formula (1), or
a coordination compound of the compound of Formula (1) with one of the phosphites, below:
HO—P OC 8 H 17 ) 2 or HO—P OC 13 H 27 ) 2 .
3. The photocationically polymerizable adhesive composition as claimed in claim 1 , wherein the compound is included in an amount of about 92 to about 98.5 parts by weight.
4. The photocationically polymerizable adhesive composition as claimed in claim 1 , wherein the titanate coupling agent is included in an amount of about 0.5 to about 3 parts by weight.
5. The photocationically polymerizable adhesive composition as claimed in claim 1 , wherein the photopolymerization initiator is included in an amount of about 1 to about 5 parts by weight.
6. The photocationically polymerizable adhesive composition as claimed in claim 1 , wherein the photopolymerization initiator includes at least one of an onium salt and an iron-arene complex.
7. The photocationically polymerizable adhesive composition as claimed in claim 1 , further comprising about 0.1 to about 10 parts by weight of a photosensitizer, based on 100 parts by weight of the compound, the titanate coupling agent, and the photopolymerization initiator.
8. The photocationically polymerizable adhesive composition as claimed in claim 7 , wherein the photosensitizer includes at least one of an organosulfur compound, a persulfide, a redox compound, an azo compound, a diazo compound, a halogen compound, and a photoreductive colorant.
9. An optical member, comprising:
an optical sheet, wherein the photocationically polymerizable adhesive composition as claimed in claim 1 is applied to at least one side of the optical sheet.
10. The optical member as claimed in claim 9 , wherein the titanate coupling agent is:
a compound represented by Formula (1):
in Formula (1), R 1 , R 2 , R 3 , and R 4 are each independently a group including one of
or two of R 1 , R 2 , R 3 , and R 4 are connected to form a ring structure including one of
a dimer of the compound of Formula (1), or
a coordination compound of the compound of Formula (1) with one of the phosphites, below:
HO—P OC 8 H 17 ) 2 or HO—P OC 13 H 27 ) 2 .
11. The optical member as claimed in claim 9 , wherein the compound is included in an amount of about 92 to about 98.5 parts by weight.
12. The optical member as claimed in claim 9 , wherein the titanate coupling agent is included in an amount of about 0.5 to about 3 parts by weight.
13. The optical member as claimed in claim 9 , wherein the photopolymerization initiator is included in an amount of about 1 to about 5 parts by weight.
14. The optical member as claimed in claim 9 , wherein the photopolymerization initiator includes at least one of an onium salt and an iron-arene complex.
15. The optical member as claimed in claim 9 , further comprising about 0.1 to about 10 parts by weight of a photosensitizer, based on 100 parts by weight of the compound, the titanate coupling agent, and the photopolymerization initiator.
16. The optical member as claimed in claim 15 , wherein the photosensitizer includes at least one of an organosulfur compound, a persulfide, a redox compound, an azo compound, a diazo compound, a halogen compound, and a photoreductive colorant.