Pressure-sensitive adhesive composition, pressure-sensitive adhesive, pressure-sensitive adhesive sheet, and display body

A technology of pressure-sensitive adhesive sheets and pressure-sensitive adhesives, applied in the direction of amide/imide polymer adhesives, ester copolymer adhesives, adhesive types, etc., can solve light reflection loss, Existence and other problems, to achieve the effect of dielectric constant suppression, excellent resistance to foaming, excellent resistance to heat and humidity whitening

Active Publication Date: 2022-02-01
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a frame-shaped printed layer may exist as a step on the display module side of the protective panel
If the pressure-sensitive adhesive layer does not follow the level difference, the pressure-sensitive adhesive layer floats near the level difference, thereby causing reflection loss of light

Method used

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  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive, pressure-sensitive adhesive sheet, and display body
  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive, pressure-sensitive adhesive sheet, and display body
  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive, pressure-sensitive adhesive sheet, and display body

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0116] 2. Preparation of pressure-sensitive adhesive composition

[0117] The pressure-sensitive adhesive composition P can be prepared by preparing a (meth)acrylate polymer (A), and combining the obtained (meth)acrylate polymer (A), active energy ray curable Component (C), if necessary, crosslinking agent (B), photopolymerization initiator (D), and additives are mixed.

[0118] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomers constituting the polymer by a normal radical polymerization method. It is preferable to perform polymerization of a (meth)acrylate polymer (A) by the solution polymerization method using a polymerization initiator as needed. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and two or more of them may be used in combination.

[0119] As a polymerization initiator, an azo compound, an organic peroxide, etc. are ...

manufacture example

[0161] As another production example of the pressure-sensitive adhesive sheet 1, the above-mentioned coating solution of the pressure-sensitive adhesive composition P is applied to the release surface of one release sheet 12a, and heat treatment is performed to combine the pressure-sensitive adhesive properties. The substance P is thermally cross-linked to form a coating layer, and the peeling sheet 12a with the coating layer is obtained. In addition, the coating liquid of the above-mentioned pressure-sensitive adhesive composition P is coated on the release surface of the other release sheet 12b, and heat treatment is performed to thermally crosslink the pressure-sensitive adhesive composition P to form a coating layer. , to obtain a release sheet 12b with a coating layer. Next, the peeling sheet 12a with a coating layer and the peeling sheet 12b with a coating layer are bonded together so that both coating layers may contact each other. When a curing period is required, the...

Embodiment 1

[0201] 1. Preparation of (meth)acrylate polymer (A)

[0202] 60 parts by mass of 2-ethylhexyl acrylate, 5 parts by mass of 4-acryloylmorpholine, 15 parts by mass of isobornyl acrylate, 5 parts by mass of N-vinylacetamide, and 2-hydroxyl acrylate by solution polymerization 15 parts by mass of ethyl ester were copolymerized to prepare a (meth)acrylate polymer (A). When the molecular weight of this (meth)acrylate polymer (A) was measured using the method mentioned later, it was 500,000 in weight average molecular weight (Mw).

[0203] 2. Preparation of pressure-sensitive adhesive composition

[0204] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step 1 (value in terms of solid content; the same applies below), and trimethylolpropane-modified toluene as a crosslinking agent (B) 0.15 parts by mass of diisocyanate (manufactured by TOYOCHEM CO., LTD., product name "BHS8515"), ε-caprolactone-modified tris(2-acryloyloxyethyl) isocyanate as active energy ra...

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Abstract

The present invention provides a pressure-sensitive adhesive composition, a pressure-sensitive adhesive, and a pressure-sensitive adhesive that are excellent in step followability, foaming resistance, and heat-and-moisture whitening resistance, and that can suppress the dielectric constant to a low level. films and displays. The pressure-sensitive adhesive composition of the present invention contains: a (meth)acrylate polymer (A) containing N-vinylcarboxamide as a monomer unit constituting the polymer; and an active energy ray-curable component (C) , and preferably further contain a crosslinking agent (B).

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition, a pressure-sensitive adhesive, a pressure-sensitive adhesive sheet, and a display obtained by using them, which can be suitably used for a display (display). Background technique [0002] In recent years, various mobile electronic devices such as smartphones and tablet PCs have been equipped with displays using display modules such as liquid crystal elements, light-emitting diodes (LED elements), and organic electroluminescent (organic EL) elements. These displays become touch panels. cases gradually increased. [0003] In the display as described above, a protective panel is usually provided on the front side of the display module. Along with the reduction in thickness and weight of electronic equipment, the above-mentioned protective panels have been gradually changed from conventional glass plates to plastic plates such as acrylic plates or polycarbonate plates. [0004] H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/38C09J133/08
CPCC09J7/00C09J133/24C09J2467/005C09J2301/302C09J133/26B32B7/12B32B17/10743C09J7/30B32B2037/1253C09J2301/416
Inventor 高桥洋一荒井隆行小鲭翔堀口结加
Owner LINTEC CORP
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