Conductive paste, method for producing conductive pattern, and touch panel
A technology of conductive paste and conductive filler, which is used in the manufacture of printed circuits, cable/conductor manufacture, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of insufficient adhesion of conductive pattern substrates and low conductivity of conductive patterns and other problems, to achieve the effect of excellent adhesion and low resistivity
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[0120] Although Examples and Comparative Examples are given below and the present invention will be described in more detail, the present invention is not limited thereto.
[0121] The evaluation methods used in each Example and Comparative Example are as follows.
[0122]
[0123] [Coating process]
[0124] The conductive paste was applied on the PET film substrate so that the film thickness of the dried film would be 7 μm.
[0125] [drying process]
[0126] The obtained coating film was dried in a 100 degreeC hot-air oven for 5 minutes.
[0127] [Pattern forming process]
[0128] The light-transmitting pattern, which is a group of straight lines arranged at a certain line width / space (hereinafter referred to as "L / S"), is set as one unit, and the drying is performed through a photomask each having 9 types of units with different L / S values. The film was exposed and developed to obtain nine types of patterns with different L / S values.
[0129] [curing process]
[0130...
Synthetic example 1
[0166] 200 g of EPOXY ESTER 3000A (manufactured by Kyoeisha Chemical Co., Ltd., an epoxy acrylate compound having a bisphenol A skeleton), 260 g of CA, and 0.5 g of 2-methylhydroquinone (heat Inhibitor) and 125g of 2,2-bis(hydroxymethyl)propionic acid were heated to 45°C using an oil bath. 150 g of hexamethylene diisocyanate was slowly added dropwise thereto so that the reaction temperature would not exceed 50°C. After the dropwise addition, the reaction temperature was raised to 80°C, and after 6 hours, the reaction solution was analyzed by infrared absorption spectrometry, and it was confirmed that there was no 2250cm -1 nearby absorption. After adding 22 g of glycidyl methacrylate, 10 g of CA, 0.4 g of 2-methylhydroquinone, and 1.5 g of triphenylphosphine (reaction catalyst) to the reaction liquid, the temperature was further raised to 95° C. , and reacted for 6 hours to obtain a compound (E-1) with a solid fraction of 64.9% by weight. The acid value (solid content) of t...
Synthetic example 2
[0168]150 g of CA was put into a reaction vessel in a nitrogen atmosphere, and the temperature was raised to 80° C. using an oil bath. 2,2'- azobisisobutyronitrile and 10 g of the mixture of CA. After completion of the dropwise addition, polymerization reaction was further performed for 6 hours. Then, 1 g of hydroquinone monomethyl ether was added to stop the polymerization reaction. Next, a mixture containing 5 g of glycidyl methacrylate, 1 g of triethylbenzyl ammonium chloride, and 10 g of CA was added dropwise over 0.5 hours. After completion of the dropwise addition, an addition reaction was further performed for 2 hours. The obtained reaction solution was purified with methanol to remove unreacted impurities, and further vacuum-dried for 24 hours to obtain a compound (E-2) having a carboxyl group. The acid value of the obtained compound (E-2) was 97 mgKOH / g, and the weight average molecular weight was 16000.
[0169] [Compound (F) having a carbon-carbon double bond] ...
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Abstract
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