ADHESIVE COMPOSITION, PROTECTIVE FILM FOR A POLARIZING PLATE, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY
First Claim
1. A pressure-sensitive adhesive composition which satisfies a condition of General Formula 1 given below:
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Δ
X≦
2 nm,
[General Formula 1]wherein Δ
X represents an absolute value of a phase retardation (Rin) in surface-direction, the phase retardation being measured by an equation {(nx−
ny)×
d} when a sheet-shaped pressure-sensitive adhesive prepared by using the pressure-sensitive adhesive composition is elongated by 500 μ
m in a vertical-axis direction of a sheet surface at 23°
C.,wherein nx represents a refractive index along a horizontal axis in a surface of the sheet-shaped pressure-sensitive adhesive, ny represents a refractive index along a vertical axis in the surface of the sheet-shaped pressure-sensitive adhesive, and d represents a thickness of the sheet-shaped pressure-sensitive adhesive.
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Accused Products
Abstract
The present invention relates to a pressure-sensitive adhesive composition, a protective film for polarizers, which includes a cured product of the pressure-sensitive adhesive composition, a polarizer, and a liquid crystal display (LCD). In the present invention, a pressure-sensitive adhesive showing excellent endurance reliability in high-temperature and/or high-humidity conditions and having superior physical properties such as cuttability, re-peeling property, and workability can be provided. In particular, it is possible to provide the pressure-sensitive adhesive composition which can prevent light leakage that may occur in an LCD, even when being applied to a film having a low stress optical coefficient.
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Citations
20 Claims
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1. A pressure-sensitive adhesive composition which satisfies a condition of General Formula 1 given below:
-
Δ
X≦
2 nm,
[General Formula 1]wherein Δ
X represents an absolute value of a phase retardation (Rin) in surface-direction, the phase retardation being measured by an equation {(nx−
ny)×
d} when a sheet-shaped pressure-sensitive adhesive prepared by using the pressure-sensitive adhesive composition is elongated by 500 μ
m in a vertical-axis direction of a sheet surface at 23°
C.,wherein nx represents a refractive index along a horizontal axis in a surface of the sheet-shaped pressure-sensitive adhesive, ny represents a refractive index along a vertical axis in the surface of the sheet-shaped pressure-sensitive adhesive, and d represents a thickness of the sheet-shaped pressure-sensitive adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification