Adhesive agent
Provided are a pressure-sensitive adhesive having excellent durability and reliability under high-temperature or high-humidity conditions, adhesion strength, workability, re-movability, and the ability to inhibit light leakage; a method for preparing the pressure-sensitive adhesive; a polarizer including the pressure-sensitive adhesive; and a liquid crystal display incorporating the polarizer.
1. A method for preparing a pressure-sensitive adhesive, comprising:
a 1 st step of coating a coating solution for forming the pressure-sensitive adhesive on a substrate; and
a 2 nd step of forming a pattern of a hard area and a soft area, whereby the soft area has a lower storage modulus than the hard area, by curing the coating solution coated on the substrate.
2. The method according to claim 1 , wherein the 2 nd step includes performing spot irradiation of ultraviolet rays to form the pattern.
3. The method according to claim 2 , wherein the ultraviolet rays have an illumination intensity of 200 mW/cm 2 to 1,000 mW/cm 2 .
4. The method according to claim 2 , wherein the ultraviolet rays have a radiation intensity of 50 mJ/cm 2 to 1,500 mJ/cm 2 .
5. The method according to claim 1 , wherein the 2 nd step includes irradiating ultraviolet rays on the coating solution coated on the substrate through an ultraviolet cutoff mask.
6. The method according to claim 5 , wherein the ultraviolet rays have an illumination intensity of 200 mW/cm 2 to 1,000 mW/cm 2 .
7. The method according to claim 5 , wherein the ultraviolet rays have a radiation intensity of 100 mJ/cm 2 to 1,500 mJ/cm 2 .
8. The method according to claim 5 , further comprising irradiating the ultraviolet rays on the coating solution after removing the ultraviolet cutoff mask.
9. The method according to claim 8 , wherein the ultraviolet rays have an illumination intensity of 200 mW/cm 2 to 1,000 mW/cm 2 .
10. The method according to claim 8 , wherein the ultraviolet rays have a radiation intensity of 400 mJ/cm 2 or less.
11. The method according to claim 1 , wherein the 2 nd step includes irradiating ultraviolet rays on the coating solution coated on the substrate through an ultraviolet shield mask.
12. The method according to claim 11 , wherein the ultraviolet shield mask has a shield rate of 40% to 95% with respect to the ultraviolet rays.
13. The method according to claim 11 , wherein the ultraviolet rays have an illumination intensity of 200 mW/cm 2 to 1,000 mW/cm 2 .
14. The method according to claim 11 , wherein the ultraviolet rays have a radiation intensity of 200 mJ/cm 2 to 1,500 mJ/cm 2 .