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Photosensitive resin composition used for touch screen, and hardening film thereof, and touch screen with hardening film

A technology of photosensitive resin and composition, which is applied in the direction of photosensitive materials, optics, and optical components used in optomechanical equipment, and can solve problems such as lack of pattern formation, reduced visual recognition, and uneven color, so as to prevent Pattern visible phenomenon, excellent development characteristics, effect of increasing refractive index

Active Publication Date: 2016-04-06
NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When a touch panel having such a structure is used in a display device such as a display, there is a problem that the electrode pattern is visible due to the difference in optical properties between the portion having the electrode pattern and the portion not having the electrode pattern. "Pattern Visible" leading to reduced visual legibility
In addition, a method of arranging a high-refractive index layer in order to reduce the difference in optical properties has been proposed, but problems such as lack of pattern formation and lack of heat resistance remain, and further development of high-performance materials is desired (see Patent Document 3, Patent Document 4)
Furthermore, recently, when a high-refractive index layer is formed on an electrode pattern, the height of the portion with the electrode pattern is different from that of the portion without the electrode pattern, thereby causing color unevenness.

Method used

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  • Photosensitive resin composition used for touch screen, and hardening film thereof, and touch screen with hardening film
  • Photosensitive resin composition used for touch screen, and hardening film thereof, and touch screen with hardening film
  • Photosensitive resin composition used for touch screen, and hardening film thereof, and touch screen with hardening film

Examples

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Embodiment

[0100] Hereinafter, the present invention will be described in more detail through synthesis examples and examples, but the present invention is not limited to these examples. In addition, unless otherwise specified, the evaluation of the resin in the following synthesis example was performed as follows.

[0101] [Solid content concentration]

[0102] A glass filter [weight: W] was impregnated with 1 g of the resin solution obtained in the following synthesis example 0 (g)] and weighing [W 1 (g)], according to the weight after heating at 160°C for 2 hours [W 2 (g)] to obtain the solid content concentration from the following formula.

[0103] Solid content concentration (weight%)=100×(W 2 -W 0 ) / (W 1 -W 0 )

[0104] [acid value]

[0105] The resin solution obtained in the following synthesis example was dissolved in dioxane, and titrated with a 1 / 10 N-KOH aqueous solution using a potentiometric titration device [manufactured by Hiranuma Sangyo Co., Ltd. under the trad...

Synthetic example 1

[0111] In a 500ml four-necked flask with a reflux condenser, add 0.23mol of bisphenol fluorene epoxy compound, 0.46mol of acrylic acid, 161.0g of propylene glycol monomethyl ether acetate and 0.48g of tetraethylammonium bromide (TEAB), reacted under heating at 100°C to 105°C with stirring for 20 hours. Then, add 0.08mol of 3,3',4,4'-biphenyltetracarboxylic dianhydride and 0.18mol of 1,2,3,6-tetrahydrophthalic anhydride in the flask, It stirred under heating at 125 degreeC for 6 hours, and the alkali-soluble resin solution 1 represented by General formula (V) was obtained. The solid content concentration of the obtained resin solution was 55.6 wt%, the acid value (solid content conversion) was 101 mgKOH / g, and the Mw obtained by GPC analysis was 2400.

[0112] In addition, the bisphenol fluorene epoxy compound used is a compound of general formula (IV), A is fluorene-9,9-diyl, R 3 ~R 6 for a hydrogen atom. The same compound was also used in Synthesis Example 2 and Synthesis...

Synthetic example 2

[0114] In a 500ml four-necked flask with a reflux condenser, add 0.23mol of bisphenol fluorene type epoxy compound, 0.46mol of acrylic acid, 161.0g of propylene glycol monomethyl ether acetate and 0.48g of tetraethylammonium bromide ( TEAB), and reacted at 100° C. to 105° C. under heating with stirring for 20 hours. Then, add 0.12mol of 3,3',4,4'-biphenyltetracarboxylic dianhydride and 0.12mol of 1,2,3,6-tetrahydrophthalic anhydride in the flask, It stirred under heating at 125 degreeC for 6 hours, and the alkali-soluble resin solution 2 represented by General formula (V) was obtained. The solid content concentration of the obtained resin solution was 55.6 wt%, the acid value (solid content conversion) was 103 mgKOH / g, and the Mw obtained by GPC analysis was 3600.

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Abstract

The invention provides a photosensitive resin composition used for a touch screen, and a hardening film thereof, and a touch screen with the hardening film. The photosensitive resin composition used for a touch screen contains: (A-1) an alkali-soluble resin obtained by reaction of (a) dicarboxylic acid or tricarboxylic acid or anhydride thereof and (b) teracarboxylic acid or acid dianhydride thereof, and an epoxide which is derived by bisphenols and contains two glycidyl ether radicals, and a monocarboxylic acid reactant containing unsaturated radicals; (B) photopolymerization monomer with at least an ethylene unsaturated bond; (C) a photopolymerization initiator; (D) at least one kind of metallic oxide particles selected from aluminum, zirconium, titanium, zinc, indium, tin, antimony, and cerium; (E) a surfactant; and (F) a silane compound. The photosensitive resin composition can form patterns through photolithographie, and especially has excellent development property. The hardening film formed by the photosensitive resin composition is high in transparency, and refractive index is improved, preventing pattern visible phenomenon of ITO wiring patterns.

Description

technical field [0001] The present invention relates to a photosensitive resin composition for a touch panel, a cured film thereof, and a touch panel having the cured film. Background technique [0002] Currently, in addition to large-scale displays such as personal computers and televisions, the demand for liquid crystal displays continues to expand to small and medium-sized displays such as mobile phones, smartphones, and tablet terminals. Recently, touch panels have been widely used as data input means in display devices such as liquid crystal displays, and among them, capacitive touch panels have been increasingly used. The capacitive touch screen has the following structure in the screen: mosaic-like electrode patterns formed of transparent conductive materials such as Indium Tin Oxide (ITO) are arranged on both sides of a transparent insulating film. The two-layer electrode patterns arranged on the two surfaces each have a shape connected in the x-axis direction and t...

Claims

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Application Information

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IPC IPC(8): G03F7/004G03F7/027G02B1/14
Inventor 小野悠树
Owner NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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