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Adhesive composition, adhesive and adhesive sheet

An adhesive and adhesive technology, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve problems such as poor followability of unevenness, shortened aging period, and insufficient , to achieve the effect of excellent uneven followability and excellent durability

Active Publication Date: 2017-03-29
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the methods of Patent Documents 1-3 are not yet sufficient from the viewpoint of shortening the aging period.
In addition, the method of Patent Document 4 is effective from the viewpoint of shortening the aging period. However, in the active energy ray-curable adhesive, a unique so-called hard adhesive is used, and there is a problem that unevenness followability is poor.

Method used

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  • Adhesive composition, adhesive and adhesive sheet
  • Adhesive composition, adhesive and adhesive sheet
  • Adhesive composition, adhesive and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154]100 parts by mass (in terms of solid content) of the polymer (A1) obtained in the above preparation example and 20 parts by mass (in terms of solid content) of the polymer (B1) were mixed and used as the photopolymerization initiator (C), diphenylmethane A mixture of ketone and 1-hydroxycyclohexyl phenyl ketone at a mass ratio of 1:1 (manufactured by Ciba Specialty Chemicals, IRGACURE500) 2 parts by mass (for 100 parts by mass of polymer (B1), equivalent to photopolymerization initiator (C) is an amount of 10 parts by mass), as an aziridine-based crosslinking agent (D), 0.05 parts by mass of trimethylolpropane tri-β-aziridine propionate, and as a silane coupling agent (E ), 0.3 parts by mass of 3-glycidoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM403"), and were stirred well to obtain a diluted solution of an adhesive composition.

[0155] The diluted solution of the obtained adhesive composition was applied to a peeling sheet (...

Embodiment 2

[0161] [Example 2-22, Comparative Example 2]

[0162] Except that the types and compounding amounts of the polymer (A), polymer (B), photopolymerization initiator (C) and aziridine-based crosslinking agent (D) were changed as shown in Table 1, the 1 A polarizing plate having an adhesive layer was similarly produced. In addition, the unit of the numerical value shown in Table 1 is a mass part.

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Abstract

An adhesive composition, an adhesive, and an adhesive sheet that are easy to handle, do not require curing after forming an adhesive layer, and are excellent in uneven followability. The adhesive composition is characterized in that it includes a (meth)acrylate polymer (A) with a weight average molecular weight of 300,000 to 2 million and a weight average molecular weight of 10,000 to 100,000. The side chain contains polymerizable bis bonded reactive (meth)acrylate polymer (B). The quantity of (B) is 5-50 mass parts with respect to 100 mass parts of (A). (B) is a (meth)acrylate polymer (b1) containing 5 to 30% by mass of a functional group (x)-containing monomer as a constituent monomer unit and a polymer having a functional group (x) that can react with it. The substituent (y) is obtained by reacting the polymerizable double bond-containing compound (b2), and the molar equivalent of the substituent (y) to the functional group (x) is 0.1-0.6.

Description

technical field [0001] The present invention relates to an adhesive composition, an adhesive (hardened material of the adhesive composition) and an adhesive sheet, and particularly relates to an adhesive composition, an adhesive, and an adhesive sheet suitable for optical components such as polarizers. Background technique [0002] In recent years, a liquid crystal display device (LCD) has been widely used as a display device, and a liquid crystal cell is used as an optical component constituting the liquid crystal display device. In general, the liquid crystal cell has the alignment layer of two transparent electrode substrates that form the alignment layer as the inner side, and is arranged at a predetermined interval with a spacer, and the periphery is sealed, and the liquid crystal material is sandwiched between the two transparent electrode substrates. hold. Usually, the outer sides of the two transparent electrode substrates of the liquid crystal cell are bonded with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J133/10C09J7/02C08F220/18C08F220/14C08F220/06C08F220/28C08F8/30C09J11/06
CPCC09J7/22C09J7/38C09J7/385C09J11/00C09J133/04C09J133/14C09J2203/318C09J2301/124C09J2301/302C09J2301/408
Inventor 又野仁荒井隆行小泽祐树所司悟
Owner LINTEC CORP
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