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Optical film coated with adhesive

An optical film and adhesive layer technology, applied in the field of optical films, can solve the problems of uneven stress distribution and stress concentration, and achieve the effects of suppressing white tone, reducing local stress concentration, and preventing floating and peeling.

Active Publication Date: 2008-03-19
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the case of exposure to high temperature, the distribution of residual stress loaded on the optical film becomes non-uniform, causing stress concentration at the peripheral portion of the optical film

Method used

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  • Optical film coated with adhesive
  • Optical film coated with adhesive
  • Optical film coated with adhesive

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0023] In the preparation of the first acrylic resin, as the (meth)acrylate represented by formula (I), one compound or two or more compounds may be used. In particular, it is preferable to use butyl acrylate as at least one monomer. The structural unit derived from (meth)acrylate of the first acrylic resin preferably contains a structural unit derived from butyl acrylate.

[0024] As the hydroxyl group-containing monomer used for another structural unit of the first acrylic resin, a compound having one ethylenic double bond and at least one hydroxyl group in the molecule is used, including, for example, 2-hydroxyethyl (meth)acrylate, ( 2-Hydroxypropyl meth)acrylate and 4-Hydroxybutyl (meth)acrylate. Such hydroxyl-containing monomers are preferably hydroxyalkyl (meth)acrylic acid esters wherein the alkyl group has about 1-10 carbon atoms, more preferably about 2-6 carbon atoms.

[0025] In addition, the first acrylic resin may contain a structural unit derived from a monomer...

Embodiment 1 to 3 and comparative example 1 to 3

[0107] (a) Preparation of adhesive

[0108] From the acrylic resin A1 itself obtained in Polymerization Example 1, or the acrylic resin A2 itself obtained in Polymerization Example 2, or in the A mixture of the acrylic resin A3 obtained in 3 and the acrylic resin A4 obtained in Example 4 was polymerized to prepare an ethyl acetate solution. Each of the ionic compounds 1 to 3, the crosslinkers "Colonate L", "Takenate D110N" and "TAZM", and the silane compound "X- 41-1805" were mixed in the ratios shown in Table 1 respectively to prepare adhesive compositions. Here, in Table 1, the mixing amount (part) of the crosslinking agent "Clonate L" or "Takenate D110N" is the amount of solid content.

[0109] Table 1

[0110] high molecular weight propane

Acrylic resin

low molecular weight propane

Acrylic resin

ionic compound

thing

crosslinking agent

Silane compound

X-41-1805

Type / quantity

(monomer composition...

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Abstract

An optical film with an adhesive layer on at least one surface of the optical film: wherein said adhesive layer is formed from a composition containing: (A) an acryl resin comprising a first acryl resin which has a structural unit derived from (meth)acrylate as a main component, and a structural unit derived from unsaturated monomer having one olefinic double bond and at least one hydroxyl group in a molecule with a weight-average molecular weight of 500,000 to 2,000,000, wherein the amount of said structural unit derived from unsaturated monomer having a hydroxyl group is 0.5 to 10 parts by weight relative to 100 parts by weight of the acryl resin; wherein R1 represents a hydrogen atom or a methyl group, R2 represents an alkyl group or an aralkyl group having 1-14 carbon atoms that may be substituted by an alkoxy group having 1-10 carbon atoms, (B) an ionic compound containing a pyridinium based cation; wherein at least one of R3 through R7 represents an alkyl group having 1-6 carbon atoms, the remainders each independently represent hydrogen or an alkyl group having 1-6 carbon atoms, R6 represents an alkyl group having 1-12 carbon atoms; and (C) a crosslinker.

Description

technical field [0001] The present invention relates to an optical film coated with an adhesive. The optical film of the present invention includes, for example, polarizing films and phase retardation films. The present invention also relates to an optical laminate for a liquid crystal display using the adhesive-coated optical film. Background technique [0002] A polarizing film is provided in a widely used and distributed liquid crystal display in such a form that a transparent protective film is adhered to both surfaces of the polarizer, an adhesive layer is formed on at least one surface of the protective film, And a release film was laminated on the adhesive layer. In addition, a phase retardation film may be laminated on a polarizing film in which a protective film is laminated on both surfaces of a polarizer to obtain an elliptically polarizing film, and an adhesive layer / separation film is on the phase retardation film side. In addition, an adhesive layer / separati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30C09J133/02C09J11/06
CPCC08G18/6229C08G18/8029B32B17/06C08K5/19C08K5/43C09J175/04C08K5/3432B32B7/12Y02P20/582Y10T428/31645G02B5/30C08J5/18
Inventor 竹厚流辛国胜
Owner SUMITOMO CHEM CO LTD
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