Cation-polymerizable adhesive and polarizing plate using the same

A cationic polymerization and adhesive technology, applied in the direction of polyether adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of polarizer and protective film peeling, normal adhesive strength reduction, etc. , to achieve the effect of excellent abnormal bond strength

Inactive Publication Date: 2010-09-08
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the normal adhesive strength of the adhesive to a polarizer made of polyvinyl alcohol or the like has not yet reached the level required by the industry. In addition, normal adhesive strength due to the influence of light and heat from a backlight etc. The combined strength decreases with time, and the polarizer and protective film may be peeled off in a relatively short period of time.
[0006] In this way, along with the development of liquid crystal displays that can display clearer images, very high levels of various characteristics are required for the optical components that constitute them. A cationically polymerizable adhesive with excellent normal-state adhesive strength at a useful level has not been found in practice

Method used

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  • Cation-polymerizable adhesive and polarizing plate using the same
  • Cation-polymerizable adhesive and polarizing plate using the same
  • Cation-polymerizable adhesive and polarizing plate using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] In a closed planetary mixer, 20.0 parts by mass of a compound (B-1) containing a glycidyl ether group and 20.0 parts by mass of a compound (B'-4) containing a glycidyl ether group, 35.0 parts by mass of ARON OXETANE OXT-221 (bis[1-ethyl(3-oxetanyl)] methyl ether manufactured by Toagosei Co., Ltd.) and 25.0 parts by mass of ARONOXETANE OXT-101 (3-hydroxymethyl-3- ethyloxetane) and 4 parts by mass of CPI-100P (diphenyl-4-(phenylthio)phenylsulfonium hexafluorophosphate manufactured by San-Apro Ltd. salt (50% by mass propylene carbonate solution) was mixed and stirred to prepare a cationically polymerizable binder (1). When the chlorine content contained in the total amount of the obtained cationically polymerizable binder (1) was determined by the method described later, it was 247 ppm.

Embodiment 2

[0161] In a closed planetary mixer, 20.0 parts by mass of a compound (B-1) containing a glycidyl ether group and 20.0 parts by mass of a compound (B'-3) containing a glycidyl ether group, 35.0 parts by mass of ARON OXETANE OXT-221 (bis[1-ethyl(3-oxetanyl)] methyl ether manufactured by Toagosei Co., Ltd.) and 25.0 parts by mass of ARONOXETANE OXT-101 (3-hydroxymethyl-3- ethyloxetane) and 4 parts by mass of CPI-100P (diphenyl-4-(phenylthio)phenylsulfonium hexafluorophosphate manufactured by San-Apro Ltd. A 50% by mass propylene carbonate solution of salt) was mixed and stirred to prepare a cationically polymerizable binder (2). The chlorine content contained in the total amount of the obtained cationically polymerizable binder (2) was determined by the method described later, and it was 219 ppm.

Embodiment 3

[0163]In a closed planetary mixer, 20.0 parts by mass of a compound (B-2) containing a glycidyl ether group and 20.0 parts by mass of a compound (B'-3) containing a glycidyl ether group, 35.0 parts by mass of ARON OXETANE OXT-221 (bis[1-ethyl(3-oxetanyl)] methyl ether manufactured by Toagosei Co., Ltd.) and 25.0 parts by mass of ARONOXETANE OXT-101 (3-hydroxymethyl-3- ethyloxetane) and 4 parts by mass of CPI-100P (diphenyl-4-(phenylthio)phenylsulfonium hexafluorophosphate manufactured by San-Apro Ltd. A 50% by mass propylene carbonate solution of salt) was mixed and stirred to prepare a cationically polymerizable binder (3). When the chlorine content contained in the total amount of the obtained cationically polymerizable binder (3) was determined by the method described later, it was 211 ppm.

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Abstract

The object of the present invention is to provide a cation-polymerizable adhesive which can maintain the excellent normal state adhesion strength and can not be affected by the heat and light, and to provide a polaroid sheet formed via adhering a polarizer and a protection film by the adhesive. The invention relates to the cation-polymerizable adhesive, charaterized in that, the adhesive contains heterocyclic butane compound (A) which has more than two oxygen heterocyclic butyls and molecular weights of 100 - 800, aromatic glycidyl ether (B) and cation-polymerizabl initiator (C), the chlorine remained in the total amount of the adhesive is below 1500 ppm. The invention also relates to the polaroid sheet formed via adhering the polarizer and the protection film by the adhesive.

Description

technical field [0001] The present invention relates to a cationically polymerizable binder that can be used in various applications including production of optical components such as polarizing plates. Background technique [0002] As a polarizing plate used for liquid crystal displays, etc., a polarizing plate composed of a polyvinyl alcohol-based film impregnated with a dichroic material such as iodine and laminated with triacetyl fiber is generally known. A transparent protective film made of plain, thermoplastic saturated norbornene-based resin, etc. For the adhesive for bonding the polarizer and the protective film, the industry requires that both adherends, the polarizer and the protective film, have excellent normal-state adhesive strength, and Excellent normal-state adhesive strength with respect to a polarizer and a protective film can be maintained for a long time without being affected by light and heat from the backlight of a liquid crystal display, etc. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02G02B5/30
CPCB32B27/06C08G65/18C09J11/06C09J171/00G02B5/30G02B5/3033G02B5/305G02F1/133528
Inventor 坂本高章田中浩二郎
Owner DIC CORP
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