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Conductive paste, conductive film, circuit and touch panel

A technology of conductive paste and conductive powder, which is applied in the direction of conductive materials, conductive materials, conductive materials, etc. dispersed in non-conductive inorganic materials, can solve the problems of corroding wiring, dehydrochlorination, non-existence, etc., and achieve fine Effect of printability and high heat and humidity resistance

Active Publication Date: 2018-04-27
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in addition to the hydrolyzable chlorine mixed in as impurities remaining in the production process, the epoxy resin will corrode the wiring and have an adverse effect on the long-term reliability test. In addition, it will also cause the following unique problems: When the resin is used for a long time The chlorine of the organic chloride will undergo a dehydrochlorination reaction, causing a short circuit in the wiring
However, currently, there is no slurry that satisfies the above conditions including low-temperature drying properties.

Method used

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  • Conductive paste, conductive film, circuit and touch panel
  • Conductive paste, conductive film, circuit and touch panel
  • Conductive paste, conductive film, circuit and touch panel

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] As the polyisocyanate used in the preparation of the above polyurethane resin, for example, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, p-phenylene diisocyanate, 4,4′-diphenylmethane diisocyanate Isocyanate, m-phenylene diisocyanate, 3,3'-dimethoxy-4,4'-biphenylene diisocyanate, 2,6-naphthalene diisocyanate, 3,3'-dimethyl-4, 4'-biphenylene diisocyanate, 4,4' diphenylene diisocyanate, 4,4'-diisocyanate diphenyl ether, 1,5-naphthalene diisocyanate, m-xylene diisocyanate, isophor Ketone diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, toluene diisocyanate, etc.

[0060] From the viewpoint of mechanical strength and reactivity, among the above-mentioned polyisocyanates, 4,4′-diphenylmethane diisocyanate and isophorone diisocyanate are particularly preferred.

[0061] The above-mentioned polyurethane resin may be copolymerized with a compound having a functional group capable of reacting with an isocyanate using a polyol and an isocyanate as require...

Embodiment

[0125] Hereinafter, the present invention will be further explained through examples and comparative examples. In addition, the present invention is not limited to the following embodiments. In addition, unless otherwise stated, "parts" in the examples mean "parts by weight", and the solid content concentration refers to the non-volatile components after the organic solvent is completely volatilized.

[0126] The polyester resin, polyurethane resin, and conductive paste in the present invention were evaluated by the following methods.

[0127] 1. Number average molecular weight

[0128] 2. Glass transition temperature (Tg)

[0129] Seal 5 mg of sample resin in an aluminum sample pan, use a differential scanning calorimeter (DSC) DSC-220 manufactured by Seiko Instruments Inc., and measure the vitrification by increasing the temperature to 200°C at a heating rate of 20°C / min. The temperature at the intersection of the extension line of the baseline below the transition temperature and...

manufacture example

[0173] (Preparation example of polyester resin P-1)

[0174] Add 700 parts of terephthalic acid, 700 parts of isophthalic acid, 16.9 parts of trimellitic anhydride, 983 parts of ethylene glycol, and 154 parts of 2-methyl into a reaction vessel equipped with a stirrer, condenser, and thermometer. -1,3-propanediol is pressurized at two atmospheres in a nitrogen environment, and the temperature is raised from 160°C to 230°C over 3 hours to carry out the esterification reaction. After decompression, add 0.92 parts of tetrabutyl titanate, and then gradually reduce the pressure in the system. After 20 minutes, the pressure is reduced to 5mmHg, and further under the vacuum condition of 0.3mmHg or less, at 260℃ for 40 minutes Polycondensation reaction. In a nitrogen stream, cool to 220°C, add 50.6 parts of trimellitic anhydride, and react for 30 minutes to obtain a polyester resin. The composition and physical properties of the obtained copolyester resin P-1 are shown in Table 1.

[017...

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Abstract

[Problem] The objective of the present invention is to provide a conductive paste which is imparted with high moisture resistance reliability without being deteriorated, preferably a conductive paste which is suitable for forming a fine wire by a screen printing method and has good dryability at low temperatures. [Solution] A conductive paste which is characterized by containing (A) a thermoplastic resin, (B) a conductive powder, (C) an ion scavenger and (D) an organic solvent.

Description

Technical field [0001] The present invention relates to conductive paste and its use. Specifically, the present invention relates to a conductive paste having high moisture and heat resistance and good fine line printability, a conductive film formed therefrom, a conductive laminate in which the conductive film is laminated on a transparent conductive layer, and a conductive laminate using the conductive paste Body touch panel. Background technique [0002] Transparent touch panels that are operated by touching the screen with fingers or dedicated pens are widely used in ATMs, car navigation systems, game machines, automatic ticket vending machines at stations, photocopiers, lecture terminals at museums, and information terminals at convenience stores. , Is constantly being popularized. The transparent touch panel is constructed by superimposing two transparent conductive films to form a switch. As a transparent conductive film of a touch panel, an indium tin oxide film (herei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22G06F3/041G06F3/045H01B1/00H01B1/24H01B5/14H05K1/09
CPCG06F3/041G06F2203/04103H01B1/22H05K1/095H05K2201/0129H05K2201/0209H05K2201/0323
Inventor 滨崎亮
Owner TOYOBO CO LTD
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