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Adhesive, adhesive sheet and optical functional film with adhesive

An optical film and adhesive technology, applied in the directions of polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problems of bonding durability and light leakage prevention difficulties, and achieve reprocessing. Effect

Active Publication Date: 2009-01-14
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In particular, when high durability is required for automotive applications, etc., it is more difficult to satisfy both adhesion durability and light leakage prevention.
[0013] In addition, in the production process of liquid crystal displays, etc., when the polarizing plate is pasted on optical components such as liquid crystal cells, if there is a deviation in the pasting position, etc., it is necessary to peel off the polarizing plate after a certain period of time after pasting, and reuse the expensive liquid crystal cell. Case

Method used

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  • Adhesive, adhesive sheet and optical functional film with adhesive
  • Adhesive, adhesive sheet and optical functional film with adhesive
  • Adhesive, adhesive sheet and optical functional film with adhesive

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preparation example Construction

[0104] The method for producing an optical film with an adhesive is not particularly limited as long as it is a method of providing a layer formed of the adhesive of the present invention on an optical film such as a polarizing plate, but according to the present invention as shown below The method can efficiently prepare the desired optical film with adhesive.

[0105] In the method of the present invention, after the polarizing plate is attached to the adhesive material layer provided on the release layer of the release sheet, active energy rays are irradiated from the release sheet side to form the adhesive material layer with A layer composed of the adhesive of the present invention having the above-mentioned specific properties can be used to obtain the optical film with the adhesive of the present invention.

[0106] The peeling sheet can be polyester films such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyolefin films such as ...

Embodiment 1-7 and comparative example 1-6

[0139] Utilize the monomer composition (acrylic acid copolymer (A)) and the acrylic copolymer (acrylic copolymer (A)) with the physical properties shown in Table 1 as shown in Table 1 to prepare the acrylic copolymer (acrylic copolymer (A) (B)). The acrylic copolymer (A) and the acrylic copolymer (B) were mixed with a polyfunctional acrylate monomer (active energy ray-curable compound (C)) and a photopolymerization initiator in the compounding amounts shown in Table 1. , a polyisocyanate compound (polyisocyanate compound (D)), a silane coupling agent (silane coupling agent (E)), and toluene was added as a solvent to obtain a coating liquid having a solid content of 20% by mass. The coating liquid was applied to a release layer of a release film made of polyethylene terephthalate ("SP-PET3811" manufactured by Lintec Co., Ltd.) with a thickness of 38 μm as a release film with a blade coater. Drying treatment was performed at 90° C. for 1 minute to form an adhesive material laye...

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Abstract

The invention provides a bonding agent, a bonding sheet using the bonding agent, and an optical film with the bonding agent and using the bonding agent, wherein the bonding agent can enable an obtained liquid crystal display device to include a characteristic that seldom give play to optical leakage even under an environment with high temperature and high humidity while bonding the optical film such as a polarization plate having excellent tolerance to a liquid crystal box, which can be easily peeled off again.

Description

technical field [0001] The invention relates to an adhesive, an adhesive sheet and an optical film with an adhesive. More specifically, the present invention relates to an adhesive, an adhesive sheet, and an optical film with an adhesive, which are suitable for use in polarizing plates, especially with viewing angle expansion films, etc. In the case of an integrally formed polarizing plate or a phase difference plate laminated on the polarizing plate, the polarizing plate can be adhered to the liquid crystal cell with good durability, and the obtained liquid crystal display device has It is also difficult to cause light leakage, etc., and it can be easily peeled off when it is pasted incorrectly. Background technique [0002] Conventionally, when a sheet made of an organic material is attached to an adherend such as glass, ceramics, or metal with an adhesive, problems such as peeling or peeling at the end of the sheet often occur after a certain period of time. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/02C09J11/08C09J11/06C09J7/02B32B7/06G02B5/30
CPCB32B7/12C08K5/54C09J7/29C09J9/00C09J11/06C09J133/08G02B5/30
Inventor 草间健太郎永元公市大桥优季增田咏子
Owner LINTEC CORP