Adhesive sheets and laminates

An adhesive sheet and adhesive layer technology, applied in the directions of adhesives, layered products, adhesive types, etc., can solve problems such as carboxylic acid deterioration, achieve excellent step followability, inhibit transparent conductive film or metal wiring corrosion, Excellent effect of anti-foaming and heat-and-moisture whitening resistance

Active Publication Date: 2019-03-08
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, depending on the type of transparent conductive film, even if the same amount of carboxylic acid is used, it may deteriorate

Method used

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  • Adhesive sheets and laminates
  • Adhesive sheets and laminates
  • Adhesive sheets and laminates

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] (5) Preparation of adhesive composition

[0074] Adhesive composition P can be carried out by preparing (meth)acrylate copolymer (A), obtained (meth)acrylate copolymer (A), polyisocyanate compound (B) and chelating compound (C) Mix, meanwhile, adding additives as needed to prepare.

[0075] The (meth)acrylate copolymer (A) can be produced by polymerizing a mixture of monomer units constituting the polymer by a common radical polymerization method. The polymerization of a (meth)acrylate copolymer (A) can be performed by a solution polymerization method etc. 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.

[0076] As a polymerization initiator, an azo compound, an organic peroxide, etc. are mentioned, and 2 or more types may be used together. Examples of azo compound...

Embodiment 1

[0121] 1. Preparation of (meth)acrylate copolymer

[0122] A (meth)acrylate copolymer (A) was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate. When the molecular weight of this (meth)acrylate copolymer (A) was measured by the method mentioned later, the weight average molecular weight was 500,000.

[0123] 2. Preparation of Adhesive Composition

[0124] 100 parts by mass (in terms of solid content, the same below) of the (meth)acrylate copolymer (A) obtained in the above step (1), trimethylolpropane-modified toluene as the polyisocyanate compound (B) 0.24 parts by mass of diisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name "Coronate L"), 0.05 parts by mass of aluminum triacetylacetonate (manufactured by Soken Chemical Co., Ltd., trade name "M-5A") as a chelate compound (C), 0.2 parts by mass of 3-glycidyloxypropyltrimethoxysilane (manufactured by...

Embodiment 2～12

[0137] [Examples 2-12, Comparative Examples 1-10]

[0138] In addition to the types and ratios of each monomer that constitutes (meth)acrylate copolymer (A), the type and amount of polyisocyanate compound (B), and the type and amount of chelating compound (C) are listed below 1 Except having changed, it carried out similarly to Example 1, and produced the adhesive sheet. In addition, the chelate compound (C) used in Examples 10 and 11 is zirconium triacetylacetonate (manufactured by Matsumoto Fine Chemical Industry Co., Ltd., trade name "Orgatics ZC-150").

[0139] Here, the above-mentioned weight average molecular weight (Mw) is a polystyrene-equivalent weight average molecular weight measured using gel permeation chromatography (GPC) under the following conditions (GPC measurement).

[0140]

[0141] ・GPC measurement device: HLC-8020, manufactured by TOSOH

[0142] · GPC column (passed in the following order): manufactured by TOSOH Corporation

[0143] TSK guard column ...

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Abstract

An adhesive sheet (1) that comprises an adhesive layer (11) having a thickness of 10 to 400 μm formed by crosslinking an adhesive composition including a (meth)acrylic acid ester copolymer (A) which has a weight-average molecular weight of 200,000 to 900,000, and includes 15 to 30 mass% of a monomer having a hydroxyl group and does not include a monomer having a carboxyl group as a monomer unit that constitutes the polymer, a polyisocyanate compound (B), and a chelate compound (C). The adhesive sheet (1) has excellent step conformability as well as excellent resistance to blisters and resistance to moisture, heat and whitening, and can suppress corrosion of transparent conductive films and metal lines and changes in resistance values of the transparent conductive films.

Description

technical field [0001] The present invention relates to an adhesive sheet usable for touch panels and the like, and a laminate obtained by using the adhesive layer of the adhesive sheet. Background technique [0002] Various mobile electronic devices such as mobile phones and tablet terminals in recent years are equipped with displays using display modules such as liquid crystal elements, light-emitting diodes (LED elements), and organic electroluminescence (organic EL) elements, and such Displays are also gradually evolving into touch panels. [0003] In such a display, a protective panel is usually provided on the front side of the display module. As electronic devices become thinner and lighter, the material of the above-mentioned protective panels has changed from traditional glass plates to plastic plates such as acrylic plates and polycarbonate plates. [0004] At this time, a gap is provided between the protective panel and the display module, so that when the prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/02C09J7/10C09J7/30C09J133/06C09J133/14C09J175/04
CPCB32B7/12B32B27/08B32B27/308B32B2307/202B32B2307/412B32B2307/714B32B2457/00C08F220/06C08F220/1804C08G18/222C08G18/6229C08G18/8025C08G18/8029C09J133/02C09J133/10C09J175/04C08F220/1808C08F220/14B32B2457/208C09J7/20C09J7/40C09J7/401C09J133/14C09J2203/326G06F3/041
Inventor 小泽祐树荒井隆行所司悟
Owner LINTEC CORP
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