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Adhesive composition, adhesive composition for polarizing plates, adhesive for polarizing plates, and polarizing plate formed using same

A technology of adhesives and compositions, applied in the direction of non-polymer organic compound adhesives, non-polymer adhesive additives, adhesives, etc., can solve the problems of curing state deviation, etc., and achieve excellent adhesion, good adhesion Excellent adhesion and decolorization resistance

Active Publication Date: 2016-11-16
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, cationic polymerizable UV-curable adhesives are easily affected by humidity during curing, and there is also a problem that the curing state is prone to variation.

Method used

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  • Adhesive composition, adhesive composition for polarizing plates, adhesive for polarizing plates, and polarizing plate formed using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0155] Although an Example is given below and this invention is demonstrated more concretely, this invention is not limited to the following Example unless the summary is exceeded. In addition, "part" and "%" in an example refer to a basis of weight.

[0156] Prepare the following ingredients.

[0157] [Photopolymerizable compound (A)]

[0158] · (A-1) Dimethacrylamide ("DMAA" manufactured by KJ Chemicals Corporation)

[0159] (A-2) Acryloylmorpholine ("ACMO" manufactured by KJ Chemicals Corporation)

[0160] ・(A-3) Ethylene glycol diacrylate (“FA-222A” manufactured by Hitachi Chemical Co., Ltd.)

[0161] 〔Oxoacid (B)〕

[0162] ・(B-1) Boric acid (manufactured by Wako Pure Chemical Industries, Ltd.)

[0163] [Water (C)]

[0164] ·(C-1) Ion-exchanged water

[0165] [Urethane (meth)acrylate compound (D)]

[0166] ・(D-1) Bifunctional polyether-based urethane acrylate obtained by the following synthesis example

Synthetic example 1

[0168] Add 0.3 g of dibutyltin dilaurate, 0.2 g of 4-methoxyphenol as a polymerization inhibitor, and 166 g of polytetramethylene glycol (molecular weight 650) to a 500 ml reaction vessel equipped with a stirrer, and stir them while The liquid temperature was heated to 40°C.

[0169] 200 g of hydrogenated diphenylmethane diisocyanate was slowly added to the reaction solution, and the temperature was raised to 60° C. over 1 hour. After continuing the reaction at 60°C until the free NCO% was 8.6%, 134 g of 2-hydroxyethyl acrylate was added, and the reaction was continued until the free NCO% was 0.5% or less to obtain a bifunctional polyether-based urethane acrylate (D-1).

[0170] The obtained bifunctional polyether-based urethane acrylate (D-1) had a weight average molecular weight of 3000 and a viscosity of 12000 mPa·s / 60°C.

[0171] [Polymerization initiator (E)]

[0172] ・(E-1) 1-Hydroxycyclohexyl phenyl ketone ("IRGACURE 184" manufactured by BASF Corporation)

[0173] ・...

Embodiment 1

[0175]

[0176]Put 85 parts of dimethylacrylamide (A-1) and 7 parts of boric acid (B-1) into the preparation flask at the same time, heat the liquid temperature to 60°C while stirring them, and continue mixing for 1 hour until the boric acid ( B-1) Completely dissolved. After cooling to room temperature, 15 parts of ethylene glycol diacrylate (A-3), 7 parts of ion-exchanged water (C-1), 30 parts of urethane acrylate (D-1), IRGACURE 184 (E-1) 2 parts and 2 parts of Lucirin TPO (E-2) were mixed, and the adhesive composition for polarizing plates was obtained by mixing.

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Abstract

The invention discloses an adhesive composition, an adhesive composition for polarizing plates, an adhesive for polarizing plates, and a polarizing plate formed using the same. The adhesive composition for polarizing plates is as an adhesive with excellent adhesive strength; is suitable for bonding polarizing elements and various polarizing film protective films, particularly polarizing elements and protective films other than those comprising triacetyl cellulose (TAC); can be produced with exceptional efficiency; and has superior colorfastness. The adhesive composition contains a photopolymerizable compound (A), an oxo acid (B) consisting of at least one substance selected from the group composed of semi-metallic compounds and the group 13 metals, and water (C).

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive composition for a polarizing plate, an adhesive for a polarizing plate, and a polarizing plate using the same. Adhesive composition used as an active energy ray-curable adhesive for a polarizer and a protective film. Background technique [0002] Liquid crystal display devices are widely used as image display devices such as liquid crystal televisions, computer monitors, mobile phones, and digital cameras. The above-mentioned liquid crystal display device has a structure in which polarizing plates are laminated on both sides of a glass substrate encapsulating liquid crystal, and various optical functional films such as retardation plates are laminated thereon if necessary. [0003] Conventionally, a polarizing plate has been used in a structure in which a protective film is attached to at least one surface, preferably both surfaces, of a polarizer formed of a polyvinyl alcohol-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/00C09J11/04G02B5/30
CPCC09J4/00C09J11/04G02B5/30
Inventor 御手洗宏志小川照彦
Owner MITSUBISHI CHEM CORP
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