Adhesive composition

Abstract

The present invention relates to an adhesive composition and a complex polarizing plate using the same and, more specifically, to an adhesive composition which comprises: a photo-polymerizable compound containing an acryl-based monomer having a hydroxyl group or a carboxyl group and an acryl-based monomer having an aromatic ring with 6 to 18 carbon atoms; and a photopolymerization initiator, wherein the adhesive composition, when used to manufacture a complex polarizing plate by binding a polarizer and a patterned phase retardation layer, can significantly enhance the binding strength between the polarizer and the patterned phase retardation layer, improve durability, such as heat resistance, moisture and heat resistance, and hot-water resistance, and have an excellent 3D effect; and to a complex polarizing plate using the same.

Description

technical field [0001] The present invention relates to adhesive compositions. Background technique [0002] In general, a display device for obtaining a stereoscopic image, such as a liquid crystal display device, usually includes a patterned retardation film. This patterned retardation film has a technical configuration in which the optical axes of the separated pattern areas are formed in directions different from each other to transmit the separated images to the left and right eyes of the viewer wearing polarized glasses, thereby embodying three-dimensionality (ie, stereoscopic) images. [0003] The patterned retardation film is generally prepared by forming an alignment layer on a glass substrate and applying liquid crystal to the alignment film to obtain alignment properties. A photosensitive liquid crystal material is aligned on the alignment layer and then crosslinked by light radiation, such as ultraviolet light, to form a polymer liquid crystal film. The polyme...

AI Technical Summary

Problems solved by technology

[0005] When the adhesion between such a patterned retardation film and the polarizing plate or polarizer decreases, deformation may occur during handling during manufacturing or use

Also, there may be concerns about peeling or swelling when exposed to heat and humidity for extended periods of time

In addition, typical PVA polarizers can shrink in the pulling direction, thus involving different retardation at different positions of the retardation film, which in turn causes the degradation of the 3D stereoscopic effect

[0006] In addition, water may accumulate due to dew condensation during handling or transportation, and thus, peeling may occur between the polarizer and the patterned retardation film bonded thereto.

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