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Cationic polymerizable adhesive and polarizing plate obtained using same

A cationic polymerization and adhesive technology, applied in the direction of adhesives, polyether adhesives, non-polymer adhesive additives, etc., can solve the problems of adverse effects on optical properties, iodine decolorization, etc., and achieve excellent adhesion and water resistance. , the effect of good curing

Inactive Publication Date: 2015-04-15
DIC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, due to the strong water absorption of the TAC film, the water droplets brought in become air bubbles and are mixed between the adhesive layer and the TAC film, which adversely affects the optical properties. In addition, the water droplets pass through the adhesive layer and reach the polarizer, thereby Has the problem of decolorizing the iodine in the polarizer

Method used

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  • Cationic polymerizable adhesive and polarizing plate obtained using same
  • Cationic polymerizable adhesive and polarizing plate obtained using same
  • Cationic polymerizable adhesive and polarizing plate obtained using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] By mixing 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A), 300 parts by mass of EPICLON EXA-830CRP with 2 100 parts by mass of ARONE OXETANE OXT-221 of the oxetane compound (B) of the above oxetanyl group, KBM-303 which is an alicyclic epoxy group-containing silane coupling agent (C), 40 mass parts of propylene carbonate 50 mass % solution of diphenyl-4-(phenylthio) phenylsulfonium hexafluorophosphate as cationic polymerization initiator (D), 2.5 mass parts of propylene carbonate as photosensitizer (E ) of 9,10-dibutoxyanthracene, 2.5 parts by mass of 1,4-diethoxynaphthalene as a photosensitizing auxiliary agent (F) and stirred to prepare a compound with a viscosity of 25mPa·s (25°C). Cationic polymerizable adhesive.

[0147] On each surface of an acrylic resin film and a TAC film mainly composed of polymethyl methacrylate, the obtained cationically polymerizable adhesives were coated with a thickness of about 2 μm using a wire rod, and the co...

Embodiment 2

[0149] By mixing 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A), 350 parts by mass of EPICLON EXA-830CRP with 2 ARONE OXETANE OXT-221, 50 parts by mass of KBM-303 which is an alicyclic epoxy group-containing silane coupling agent (C) of the above oxetane-based oxetane compound (B), 40 mass parts of propylene carbonate 50 mass % solution of diphenyl-4-(phenylthio) phenylsulfonium hexafluorophosphate as cationic polymerization initiator (D), 2.5 mass parts of propylene carbonate as photosensitizer (E ) of 9,10-dibutoxyanthracene, 2.5 parts by mass of 1,4-diethoxynaphthalene as a photosensitizing auxiliary agent (F) and stirred to prepare a compound with a viscosity of 26mPa·s (25°C). Cationic polymerizable adhesive.

[0150] On each surface of an acrylic resin film and a TAC film mainly composed of polymethyl methacrylate, the obtained cationically polymerizable adhesives were coated with a thickness of about 2 μm using a wire rod, and the coated base...

Embodiment 3

[0152]By mixing 100 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A), 375 parts by mass of EPICLON EXA-830CRP as an aromatic glycidyl ether (A) in a reaction vessel equipped with a stirrer, a reflux cooler, a thermometer, a dropping funnel, and a nitrogen inlet ARONE OXETANE OXT-221, 25 parts by mass of KBM-303 which is an alicyclic epoxy group-containing silane coupling agent (C) of the above oxetane-based oxetane compound (B), 40 mass parts of propylene carbonate 50 mass % solution of diphenyl-4-(phenylthio) phenylsulfonium hexafluorophosphate as cationic polymerization initiator (D), 2.5 mass parts of propylene carbonate as photosensitizer (E ) of 9,10-dibutoxyanthracene, 2.5 parts by mass of 1,4-diethoxynaphthalene as a photosensitizing auxiliary agent (F) and stirred to prepare a compound with a viscosity of 26mPa·s (25°C). Cationic polymerizable adhesive.

[0153] On each of the surfaces of the acrylic resin film and the TAC film mainly composed of ...

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Abstract

The present invention addresses the problem of providing: a cationic polymerizable adhesive having water resistance and adhesion properties excellent enough that even when the polarizing plate or the like is bent, there is no peeling away from the protective film and / or polarizer, and cracks do not form in the adhesive layer; and a polarizing plate obtained using the same. The present invention pertains to: a cationic polymerizable adhesive containing an aromatic glycidyl ether (A), an oxetane compound (B) having at least two oxetanyl groups, a silane coupling agent (C) containing an alicyclic epoxy group, and a cationic polymerization initiator (D), the cationic polymerizable adhesive being characterized by using 100 parts by mass of the aromatic glycidyl ether (A), 300-395 parts by mass of the oxetane compound (B), and 5-100 parts by mass of the silane coupling agent (C); and a polarizing plate obtained by adhering a polarizer and a protective film to one another using the same.

Description

technical field [0001] The present invention relates to a cationically polymerizable adhesive that can be used in various applications including production of polarizing plates used in liquid crystal displays and the like. Background technique [0002] As adhesives, cationically polymerizable adhesives that are less likely to be inhibited by oxygen in the atmosphere and that can undergo a curing reaction even after the supply of energy such as ultraviolet rays is stopped have attracted attention. Accordingly, the development of cationically polymerizable adhesives has been significantly advanced in recent years, and adhesives suitable for various applications have been reported. [0003] As the cationically polymerizable adhesive, for example, a cationically polymerizable adhesive containing a glycidyl ether group-containing compound obtained by distilling cyclohexanedimethanol diglycidyl ether, bisphenol F type di A compound containing a glycidyl ether group obtained by di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J11/06C09J163/00G02B5/30G02F1/1335
CPCC09J11/06G02B5/30C08G59/245C09J171/02C08G65/105C08G65/18G02F1/1335C09J171/00G02B5/3025C08G59/68C09J163/00
Inventor 山本辰弥田中浩二郎小尾一树
Owner DIC CORPORATION
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