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 pressure-sensitive adhesive comprising:
a hard area; and
a soft area having a lower storage modulus than the hard area,
wherein the hard area and the soft area are patterned within a single plane and the hard area occupies from 10% to 60%, relative to the entire area of the pressure-sensitive adhesive.
2. The pressure-sensitive adhesive according to claim 1 , wherein the hard area has a storage modulus ranging from 1 MPa to 50 MPa at 30° C.
3. The pressure-sensitive adhesive according to claim 1 , wherein the soft area has a storage modulus ranging from 0.01 MPa to 5.0 MPa at 30° C.
4. The pressure-sensitive adhesive according to claim 1 , wherein the hard area is patterned in the shape of a line.
5. The pressure-sensitive adhesive according to claim 4 , wherein the hard area is patterned in the shape of a continuous line.
6. The pressure-sensitive adhesive according to claim 1 , wherein the ratio (G′ hard /G′ soft ) of the storage modulus (G′ hard ) of the hard area to the storage modulus (G′ soft ) of the soft area is 3 to 100.
7. The pressure-sensitive adhesive according to claim 1 , wherein the pressure-sensitive adhesive includes an interpenetrating polymer network.