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Adhesive composition for polarizing plate, adhesive sheet for polarizing plate, polarizing plate with adhesive layer, laminate, and flat panel display

A technology of adhesive layer and polarizing plate, applied in the direction of non-polymer adhesive additives, adhesive types, adhesive additives, etc., can solve the problems of insufficient durability and processing characteristics of the adhesive layer, light leakage, etc., Excellent processing properties, stress relaxation, and good hardness properties are achieved

Active Publication Date: 2018-04-17
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no research on the hardness characteristics and crosslinking design of the adhesive layer in this document, when the adhesive tape with the above-mentioned adhesive layer is used in the bonding of the polarizer and the liquid crystal unit (the glass substrate), The durability and processing characteristics of the adhesive layer may be insufficient, or light leakage may occur

Method used

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  • Adhesive composition for polarizing plate, adhesive sheet for polarizing plate, polarizing plate with adhesive layer, laminate, and flat panel display
  • Adhesive composition for polarizing plate, adhesive sheet for polarizing plate, polarizing plate with adhesive layer, laminate, and flat panel display
  • Adhesive composition for polarizing plate, adhesive sheet for polarizing plate, polarizing plate with adhesive layer, laminate, and flat panel display

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0164]

[0165] The polarizing plate with an adhesive layer of the present invention can be produced, for example, by the following methods (1) to (3).

[0166] (1) Coating the coating solution containing the adhesive composition for polarizing plates of the present invention on the release layer of the release film by a known method (die coating method, blade coating method, etc.), and drying the coating by heat drying. The solvent and the like contained in the cloth liquid are vaporized to form an adhesive layer with a desired thickness, and this is bonded to the polarizing plate.

[0167] (2) Coating the coating solution containing the composition of the present invention on a polarizing plate by a known method (die coating method, blade coating method, etc.), and vaporizing the solvent or the like contained in the coating solution by heat drying , form an adhesive layer with a desired thickness, and bond it to the release layer of the release film.

[0168] (3) Coat the...

Embodiment

[0180] Hereinafter, the present invention will be described in detail through examples.

[0181] w ) and molecular weight distribution (M w / M n )>

[0182] The weight-average molecular weight of the (meth)acrylic resin was determined by GPC (gel permeation chromatography) in terms of standard polystyrene under the following conditions.

[0183]

[0184] Measuring device: HLC-8120GPC (manufactured by Tosoh Corporation)

[0185] GPC column structure: the following five columns (all manufactured by Tosoh Corporation)

[0186] (1) TSK-GEL HXL-H (guard column)

[0187] (2) TSK-GEL G7000HXL

[0188] (3) TSK-GEL GMHXL

[0189] (4) TSK-GEL GMHXL

[0190] (5) TSK-GEL G2500HXL

[0191] Sample concentration: dilute to 1.0mg / cm with tetrahydrofuran 3

[0192] Mobile phase solvent: tetrahydrofuran

[0193] Flow: 1.0cm 3 / min

[0194] Column temperature: 40°C

[0195] "Production example of (meth)acrylic resin"

[0196] In the reaction device equipped with stirrer, reflux ...

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Abstract

The object of the present invention is to provide a kind of adhesive composition, can suitably be used on the bonding of polarizing plate and various optical parts (especially thin transparent substrate), can effectively suppress the bending of above-mentioned parts under thermal environment, effectively It prevents light leakage, and is difficult to adhere to tools, etc., and has excellent processing characteristics. The present invention relates to an adhesive composition for a polarizing plate, comprising: (A) a (meth)acrylic resin containing a structural unit derived from a monomer of the following (a1)-(a4) in the following ratio: ( a1) 5-50% by weight of a (meth)acrylic monomer having a homopolymer Tg of 0°C or higher, (a2) a (meth)acrylic monomer having a homopolymer Tg of -60°C or higher and less than 0°C 43-93.9% by weight of the monomer, (a3) ​​1.1-7% by weight of a (meth)acrylic monomer having a carboxyl group, (a4) 0-10% by weight of other monomers; (B) the above-mentioned (meth)acrylic acid Resin is 100 parts by weight, 0.15-1.5 parts by weight of crosslinking agent; (C) silane coupling agent.

Description

technical field [0001] The present invention relates to an adhesive composition for polarizing plates, an adhesive sheet for polarizing plates having an adhesive layer containing the composition, and a polarizer with an adhesive layer having the adhesive layer formed on at least one surface thereof. plate, a laminate obtained by laminating a transparent substrate on the adhesive layer of the polarizing plate with an adhesive layer, and a flat panel display having the above-mentioned polarizing plate with an adhesive layer or a laminate, the Adhesive composition for polarizing plates that can be used as an adhesive for bonding polarizing plates to optical components, such as bonding to thin transparent substrates, has excellent processability at room temperature, and is excellent in stress relaxation when heated , the bending of the above-mentioned optical member can be sufficiently suppressed. Background technique [0002] With regard to adhesives for the flat panel display...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/06C09J11/06G02B5/30G02F1/1335C09J7/22C09J7/38
CPCC08K5/0025C08K5/54C09J2203/318C09J2433/00G02B5/305C09J133/04C08L2312/00C09J7/38C09J7/22C09J2301/408
Inventor 室井佐知大冈龙太
Owner SOKEN CHEM & ENG CO LTD
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