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

A technology of adhesives and compositions, applied in the direction of non-polymer adhesive additives, adhesive types, adhesive additives, etc., can solve the problems of lack of dimensional stability, dimensional changes, etc., and achieve excellent transparency, adhesiveness, etc. Excellent adhesion and excellent durability

Active Publication Date: 2020-12-15
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned polarizer typically has a three-layer structure in which both sides of a polyvinyl alcohol-based polarizer are sandwiched between triacetate-based protective films, and lacks dimensional stability due to the characteristics of these materials.
In addition, polyvinyl alcohol-based polarizers are molded by stretching, so dimensional changes are likely to occur due to heat from the backlight over time, heat and humidity in the environment.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16、 comparative example 1～9

[0218]

[0219] In the combination described in Table 3, the acrylic resin (A) and the acrylic resin (B) were blended so that the weight ratio (solid content ratio) was 1:1, and the film thickness after drying was 25 μm It was coated on light-peeling PET (manufactured by Toray Co., Ltd., "Toray lumirror SP 01": thickness 38 μm) using the method. After drying at 100°C for 3 minutes, paste it on an alkali-free glass (manufactured by Corning Incorporated, "EAGLE XG": thickness 1.1mm), remove the diaphragm, and use a haze meter "HAZE MATER NDH2000" (Nippon Denshoku Co., Ltd.), and haze (%) was measured, and compatibility (transparency) was evaluated. In addition, this machine complies with JIS K7361-1. The evaluation criteria are as follows. The results are shown in Table 3.

[0220] (Evaluation)

[0221] ○···Haze less than 1%

[0222] ×···Haze is 1% or more

[0223] [table 3]

[0224] table 3

[0225]

[0226] [Crosslinking agent (C)]

[0227] As the crosslinking ag...

Embodiment 17～30

[0238] [Examples 17-30, Comparative Examples 10-15]

[0239] The ingredients prepared and prepared as above were mixed in the ratios shown in the following Table 4 to prepare an adhesive composition as an adhesive forming material, which was diluted with ethyl acetate (viscosity [500 to 10000mPa·s (25°C)]) to prepare an adhesive composition solution.

[0240] Next, the adhesive composition solutions of Examples 17 to 30 and Comparative Examples 10 to 15 were applied to a polyester-based release sheet so that the thickness after drying became 25 μm, and dried at 100° C. for 3 minutes. The formed adhesive composition layer was transferred to a polarizing plate (protective film: TAC film manufactured by Fujifilm Corporation), and aged at 23° C. and 65% RH for 7 days to obtain a polarized plate with an adhesive layer. plate.

[0241] In addition, the said polarizing plate was cut and used so that it may become 0 degree|times with respect to a stretching axis.

[0242] Using the...

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Abstract

The adhesive composition of the present invention contains an acrylic resin (A) obtained by polymerizing a polymerization component containing a reactive functional group-containing monomer (a1), and an acrylic resin (B). , the acrylic resin (B) is obtained by polymerizing a polymer component that does not contain a reactive functional group-containing monomer, and the polymer component of the acrylic resin (A) contains 2.5 to 30% by weight of a reactive functional group-containing monomer ( a1), the polymerization component of the acrylic resin (B) contains a non-reactive polar functional group-containing monomer (b1).

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive using the same, and an adhesive for polarizing plates. More specifically, it relates to forming durability, light leakage resistance, reworkability, transparency, and antistatic properties An adhesive composition excellent in an adhesive, an adhesive using the same, and an adhesive for polarizing plates. Background technique [0002] In the past, the following operations have been performed: protective films for both sides of polyvinyl alcohol-based films and the like (generally, cellulose triacetate films, acrylic, cycloolefin, olefin, retardation layers, etc.) film, etc.), such as cellulose triacetate film, to form a polarizing plate, and the polarizing plate is laminated on the surface of a liquid crystal cell sandwiching a liquid crystal component aligned between two glass plates, thereby producing a liquid crystal display Lamination of the plate on the surface of the liquid cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/00C09J11/06C09J163/00C09J175/04G02B5/30
CPCC09J11/06C09J133/00C09J163/00C09J175/04G02B5/30
Inventor 三谷直也中岛贵弘山中淳司
Owner MITSUBISHI CHEM CORP
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