Optical film with adhesive and optical laminate using same

A technology of optical laminates and adhesive layers, which is applied in the field of optical films, can solve problems such as poor compatibility, and achieve the effects of excellent reworkability, suppression of electrification, and suppression of whitening

Active Publication Date: 2014-12-31
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the compounds used in Patent Document 6 are only ionic compounds having inorganic cations such as Li salts, and such ionic compounds have a problem of poor compatibility with the base polymer of the binder.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～2

[0216] (a) Manufacture of adhesive composition

[0217] With respect to 100 parts each of the solid content of the acrylic resins A to E obtained in Polymerization Examples 1 to 5, 3 parts each of the ionic compounds shown in Table 2, and 0.5 parts of the crosslinking agent "CORONATE L ", and 0.5 parts of silane-based compound "KBM-403", and ethyl acetate was added so that the solid content concentration was 13%, and an adhesive composition was prepared. In the column of ionic compounds in Table 2, the serial numbers of the above-mentioned ionic compounds 1 to 3 and whether they are solid or liquid at room temperature are shown.

[0218] (b) Preparation of optical film with adhesive

[0219] Each of the above-mentioned adhesive compositions was coated on a release-treated polyethylene terephthalate film (trade name "PET 3811", obtained from lintec (KK) using a coater, called a release layer ( separator)) to a thickness of 20 μm after drying, and dried at 90° C. for 1 minute to...

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Abstract

An adhesive layer (20) formed from a composition that contains (A), (B), and (C) is provided on an optical film (10) to produce an optical film with adhesive (25). (A) 100 parts by weight of an acrylic resin which is a copolymer of a monomer mixture that contains: (A-1) 55-94 wt% of a (meth)acrylic acid ester with formula (I) (I) (R1 is hydrogen or a methyl group, and R2 is a C1-14 alkyl or aralkyl), (A-2) 5-40 wt% of a (meth)acrylic acid ester having an alkoxyethyl group, such as acrylic acid 2-methoxyethyl, and (A-3) 0.1-5 wt% of an unsaturated monomer having a polar functional group. (B) 0.3-12 parts by weight of an ionic compound that has organic cations and is a solid at room temperature. (C) 0.1-5 parts by weight of a crosslinking agent.

Description

technical field [0001] The present invention relates to an optical film formed with an adhesive layer. As an optical film made into the object of this invention, a polarizing plate and a retardation film are mentioned, for example. This invention also relates to the optical laminated body for liquid crystal displays using the optical film in which the pressure-sensitive adhesive layer was formed. Background technique [0002] The polarizing plate is installed on the liquid crystal display device and is widely used. It is to laminate transparent protective films on both sides of the polarizing plate, and form an adhesive layer on the surface of at least one protective film, and on the adhesive layer It is circulated in the state where the release film is pasted. In addition, a retardation film may be laminated on a polarizing plate with protective films attached to both surfaces of the polarizing plate to form an elliptically polarizing plate, and an adhesive layer / release ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C09J7/02C09J11/06C09J133/04
CPCC09J2203/318C09J133/06C09J7/0217C09J7/385
Inventor 竹厚流金容演许智惠太田阳介
Owner SUMITOMO CHEM CO LTD
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