Anchor layer formation composition, anchor layer, optical film provided with adhesive layer, and image display device

A technology of adhesive layer and anchoring layer, applied in the direction of ester copolymer adhesive, adhesive type, film/sheet adhesive, etc., which can solve problems such as peeling, floating, and increased shrinkage stress , to achieve the effects of improving adhesion, suppressing defects, and excellent reworkability

Inactive Publication Date: 2017-02-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when liquid crystal panels are used in automotive applications such as navigation that require higher durability, the shrinkage stress applied to the optical film will also increase, making it easier to cause floating and peeling
Specifically, for example, even if there is no problem in a reliability test at about 80°C for TV applications, etc., floating and peeling are likely to occur in a reliability test at about 95°C for in-vehicle applications such as navigation. wait for bad condition
In addition, when the optical film with the adhesive layer is bonded to the liquid crystal display, if necessary, it is temporarily peeled off and bonded again (reworked), if the adhesive force between the optical film and the adhesive is low, the Adhesive remains on the surface of the liquid crystal display, and it may not be able to be effectively reprocessed.
In addition, if the end of the optical film with an adhesive layer comes into contact with a person or surrounding objects during handling during the use process such as cutting and transporting the optical film with an adhesive layer, it is also easy to cause damage. Defects such as poor display of liquid crystal panels due to partial adhesive layer defects

Method used

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  • Anchor layer formation composition, anchor layer, optical film provided with adhesive layer, and image display device
  • Anchor layer formation composition, anchor layer, optical film provided with adhesive layer, and image display device
  • Anchor layer formation composition, anchor layer, optical film provided with adhesive layer, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] (Preparation of Adhesive Composition)

[0159] In a reaction vessel equipped with a cooling pipe, a nitrogen inlet pipe, a thermometer and a stirring device, 100 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.075 parts by weight of hydroxyethyl acrylate, and relative to the monomer ( Solid content) 100 parts by weight of benzoyl peroxide (BOP) as an initiator was reacted at 60° C. for 7 hours under a nitrogen stream. Then, ethyl acetate was added to this reaction liquid, and the solution (30 weight% of solid content concentration) containing the (meth)acrylate copolymer with a weight average molecular weight of 1.6 million was obtained.

[0160] With respect to 100 parts by weight of the solid content of the obtained acrylate copolymer-containing solution (solid content concentration: 30% by weight), trimethylolpropane / toluene diisocyanate trimer adduct (trade name: : CORONATE L, manufactured by Nippon Polyurethane Industry Co., Ltd.) 0.6 parts...

Embodiment 2～7

[0166] An adhesive optical film was produced in the same manner as in Example 1 except that the composition of the anchor layer-forming composition (1) used in Example 1 was changed to the composition described in Table 1.

Embodiment 8

[0168] An adhesive type optical film was produced in the same manner as in Example 1, except that the single-sided protective polarizing film was changed to a double-sided protective polarizing film, and an anchor layer was formed on one protective film of the double-sided protective polarizing film.

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Abstract

The objective of the present invention is to provide an anchor layer formation composition that can form an anchor layer that can increase the adhesiveness of an optical film and an adhesive layer by being interposed between the optical film and adhesive layer. The objective of the present invention is also to provide: an optical film that is provided with an adhesive layer, is able to exhibit superior durability and reworking properties, and can suppress the occurrence of defects in the adhesive layer; and an image display device that uses the optical film provided with an adhesive layer. The anchor layer formation composition is characterized by containing an oxazoline-group-containing polymer and an ionic compound having an anion component having a sulfonyl group and a cation component.

Description

technical field [0001] The present invention relates to a composition for forming an anchor layer, an anchor layer, an optical film with an adhesive layer, and an image display device. Background technique [0002] Due to the image forming methods of liquid crystal display devices and organic EL display devices, for example, in liquid crystal display devices, it is essential to arrange polarizing elements on both sides of the liquid crystal cell, and usually a polarizing film is attached. In addition to polarizing films, various optical elements have been used in display panels such as liquid crystal panels and organic EL panels in order to improve the display quality of displays. In addition, front panels are used to protect liquid crystal display devices, organic EL display devices, image display devices such as CRTs, and PDPs, to impart a sense of luxury, and to differentiate designs. Among the members used in image display devices such as liquid crystal display devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/06B32B27/00C09D5/00C09D7/12C09J7/02C09J133/04G02B5/30C09J7/22C09J7/25C09J7/38C09J7/50
CPCB32B27/00C09J133/04C09D5/08C09D5/16C09J2203/318C09J2433/003C09J7/38C09J7/22C09J7/50C09J7/25C09D201/025C09D7/40C09J2433/00C09J2301/302C08L33/14C09D7/61C09J7/20C09D7/63C09D5/00C09D201/06C09J133/08C09J133/10G02B5/30B05D1/02B05D1/18B05D1/28B05D1/305C09J133/14C09J2479/021
Inventor 永田瑞穗高桥俊贵中尾绘里子
Owner NITTO DENKO CORP
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