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Optical film having adhesive agent, and optical laminated body in which same is used

An adhesive layer and optical film technology, applied in the field of optical films, can solve the problem of adhesive layer foaming, excellent durability, between the adhesive layer and the adhesive layer, or between the adhesive layer and the liquid crystal cell glass. Problems such as floating and peeling occur between them, and the effect of suppressing electrification, excellent durability, and excellent reworkability is achieved.

Active Publication Date: 2013-11-20
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, the above-mentioned optical film with an adhesive is bonded to a liquid crystal cell with the adhesive layer side to form a liquid crystal display device, but in this state, it is placed at high temperature or high temperature and high humidity. conditions, or when heating and cooling are repeatedly applied, as the size of the optical film changes, the adhesive layer foams, or between the optical film and the adhesive layer, or between the adhesive layer and the liquid crystal cell glass Floating, peeling, etc. occur between them, so it is also required that such defects do not occur and excellent durability is required.

Method used

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  • Optical film having adhesive agent, and optical laminated body in which same is used
  • Optical film having adhesive agent, and optical laminated body in which same is used
  • Optical film having adhesive agent, and optical laminated body in which same is used

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13 and comparative example 1～2

[0289] (a) Manufacture of adhesive

[0290] Using the 20% ethyl acetate solution of the acrylic copolymer prepared in Polymerization Examples 1 to 13, the ionic compound and the crosslinking agent "CORONATE L" were prepared in the amounts shown in Table 2 with respect to 100 parts of each solid content. , and the silane-based compound "KBM-403" was mixed in an amount of 0.5 parts, and ethyl acetate was further added so that the solid content concentration became 13%, and an adhesive composition was prepared. In addition, as mentioned above, the crosslinking agent "CORONATE L" is an ethyl acetate solution with a solid content concentration of 75%, and the addition amount shown in Table 2 is the amount of solid content (active ingredient).

[0291] (b) Preparation of optical film with adhesive

[0292] Each of the above adhesive compositions was applied to a release-treated polyethylene terephthalate film (trade name "PLR-382050", available from The release-treated surface obt...

Embodiment 14～17 and comparative example 3～6

[0332] (a) Manufacture of adhesive

[0333] Using 40% ethyl acetate solutions of the acrylic copolymers prepared in Polymerization Examples 14 to 17, the ionic compound and the crosslinking agent "CORONATE L" were adjusted in the amounts shown in Table 4 with respect to 100 parts of each solid content. (Crosslinking agent "CORONATE L" is the amount of solid content), and the silane-based compound "KBM-403" is mixed in an amount of 0.5 parts, and ethyl acetate is further added so that the solid content concentration is 29%, to prepare an adhesive combination thing.

[0334] (b) Preparation of optical film with adhesive

[0335] Each of the above adhesive compositions was applied to a release-treated polyethylene terephthalate film (trade name "PLR-382050", available from The release-treated surface obtained from Lintec Co., Ltd.; called a spacer) was dried at 100° C. for 1 minute to obtain a sheet-shaped adhesive. Next, an 80-μm-thick protective film made of triacetyl cellul...

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Abstract

The present invention provides an optical film having an adhesive agent, the optical film being provided with an adhesive agent layer obtained using a composition in which 0.3 to 12 parts by weight of an ionizable compound and 0.1 to 5 parts by weight of a cross-linking agent are compounded with 100 parts by weight of an acrylic copolymer of a monomer mixture comprising 80 to 96 wt% of (A-1), 1 to 15 wt% of (A-2), 0.1 to 5 wt% of (A-3), and 0.5 to 5 wt% of (A-4). (A-1) is a compound of formula (I) (R1 is a hydrogen or methyl, and R2 is a C1-14 alkyl), (A-2) is an unsaturated monomer having an aromatic ring, (A-3) is a compound of formula (II) (R3 is a hydrogen or methyl, R4 is an alkyl, and m is 1 to 8), and (A-4) is an unsaturated monomer having a polar functional group.

Description

technical field [0001] The present invention relates to an optical film formed with an adhesive layer. The optical film made into the object of this invention includes a polarizing plate and a retardation film, for example. This invention also relates to the optical laminated body for liquid crystal displays using the optical film which formed the said pressure-sensitive adhesive layer. Background technique [0002] Polarizing plates are installed in liquid crystal display devices and are widely used. In a polarizing plate, a transparent protective film is usually laminated on both surfaces of a polarizing film, an adhesive layer is formed on at least one surface of the protective film, and a release film is bonded to the adhesive layer. In addition, there is also a case where a retardation film is laminated on a polarizing plate with a protective film attached to both sides of the polarizing film to form an elliptically polarizing plate, and an adhesive layer / release film...

Claims

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Application Information

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IPC IPC(8): C09J7/02B32B27/00B32B27/30C09J9/02C09J11/06C09J133/00G02B5/30C09J7/22C09J7/38
CPCG02B1/04C09J2203/318C08J2433/00C09J7/0246C09J133/26C09J2433/00C09J7/38C09J7/22C08L33/08C08L33/26C08L33/10C09J7/385C09J133/04C09J2301/302
Inventor 永安智竹厚流太田阳介李真求
Owner SUMITOMO CHEM CO LTD
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