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Optical film with adhesive and optical laminate

A technology of adhesive layer and optical film, which is applied in the field of optical film, can solve the problems of whitening, whitening of the outer periphery, uneven residual stress distribution of optical film, etc.

Active Publication Date: 2010-08-04
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when exposed to high temperature, the distribution of residual stress acting on the optical film is not uniform, and stress concentration occurs on the outer peripheral portion of the optical film. phenomenon, or color unevenness, so it is also required to suppress such whitening and color unevenness

Method used

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  • Optical film with adhesive and optical laminate
  • Optical film with adhesive and optical laminate
  • Optical film with adhesive and optical laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～3

[0246] (a) Manufacture of adhesive

[0247] The acrylic resins A1 to A4 obtained in Polymerization Examples 1 to 4 were respectively used in an amount of 100 parts in terms of non-volatile components, and the above-mentioned ionic compounds, acrylic resins, and acrylic resins were mixed therein at the ratios shown in Table 1, respectively. A bonding agent and a silane compound are used to prepare an adhesive composition. However, the compounding quantity (part) of a crosslinking agent in Table 1 is the quantity of solid content.

[0248] Table 1

[0249]

[0250] *Meaning of the symbols in the monomer composition column of acrylic resin

[0251] BA: butyl acrylate

[0252] HEA: 2-Hydroxyethyl Acrylate

[0253] HBA: 4-Hydroxybutyl Acrylate

[0254] AA: Acrylic

[0255] The numbers following "HEA", "HBA" and "AA" indicate the content (%) of the monomer unit in the acrylic resin.

[0256] (b) Fabrication of optical film with adhesive

[0257] Each of the above-mentione...

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Abstract

Disclosed is an optical film with adhesive, which is obtained by forming an adhesive layer on the surface of an optical film. The adhesive layer is improved in antistatic properties, while having excellent durability. Specifically, the optical film with adhesive is obtained by forming an adhesive layer on the surface of an optical film. The adhesive layer is made from a composition containing 100parts by weight of a specific acrylic resin (A), 0.01-5 parts by weight of an ionic compound (B), 0.05-5 parts by weight of a hexamethylene diisocyanate crosslinking agent (C), and 0.03-1 part by weight of a silane compound (D). The acrylic resin(A)is mainly composed of a hydroxyl group-containing acrylic resin having a weight-average molecular weight of 500,000-2,000,000, which contains a structural unit derived from a (meth)acrylate represented by the formula (I) below and a structural unit derived from a hydroxyl group-containing monomer in such an amount that the structural unit derived from a hydroxyl group-containing monomer is 0.5-5 parts by weight per 100 parts by weight of the entire resin. In the formula (I), R1 represents a hydrogen or a methyl; and R2 represents a C1-14 alkyl or aralkyl.

Description

technical field [0001] This invention relates to optical films with adhesives. As an optical film which becomes a target in this invention, a polarizing film and a retardation film are mentioned, for example. This invention also relates to the optical laminated body for liquid crystal displays using this optical film with an adhesive agent. Background technique [0002] Polarizing films are mounted on liquid crystal display devices and are widely used to laminate transparent protective films on both sides of polarizers, form an adhesive layer on at least one surface of the protective film, and attach a release film to the adhesive layer. state of circulation. In addition, the retardation film is laminated on the polarizing film in the state where the protective film is bonded to both sides of the polarizer to form an elliptically polarizing film, and an adhesive layer / release film is also attached to the retardation film side. [0003] Furthermore, the pressure-sensitive ...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B7/02C08F220/26C09J133/06C09J133/14C09J175/04
CPCC08G18/6229C09J133/066C09J175/04
Inventor 竹厚流张柱烈柳廷昊
Owner SUMITOMO CHEM CO LTD
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