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Conductive ink

A conductive ink and solvent technology, applied in the directions of inks, conductive materials, conductive materials, etc., can solve the problems of reduced fluidity, volatile alcohol solvents, and difficulty in uniform coating, so as to suppress composition changes and improve operability. , the effect of reducing the number of layers

Pending Publication Date: 2021-01-05
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, alcoholic solvents such as methanol and butanol have been used as solvents for dispersing the silver nanoparticles coated on the surface, but alcoholic solvents are easy to volatilize, and sometimes fluidity may be caused by the volatilization of the above-mentioned solvents before coating. Reduced, difficult to coat evenly

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0157] (Ink preparation process)

[0158] The preparation process of the ink is to make the surface-modified silver nanoparticles (A) (preferably the surface-modified silver nanoparticles in wet state with glycol ether solvent and / or glycol ester solvent (b-2) obtained through the above-mentioned procedure. Particles (A)), a solvent (B) containing at least a terpene-based solvent (b-1), and, if necessary, additives are mixed to obtain the conductive ink of the present invention. For the above-mentioned mixing, for example, generally known mixing equipment such as a self-rotating and revolving stirring degassing device, a homogenizer, a planetary mixer, a three-roll mill, and a bead mill can be used. In addition, the ingredients may be mixed simultaneously or stepwise.

[0159] [Manufacturing method of electronic device]

[0160] The manufacturing method of the electronic device of the present invention includes: a step of applying the above-mentioned conductive ink on a subs...

preparation example 1

[0172] Preparation Example 1 (preparation of surface-modified silver nanoparticles)

[0173] Silver oxalate (molecular weight: 303.78) was obtained from silver nitrate (manufactured by Wako Pure Chemical Industries, Ltd.) and oxalic acid dihydrate (manufactured by Wako Pure Chemical Industries, Ltd.).

[0174]40.0 g (0.1317 mol) of the aforementioned silver oxalate was added to a 500 mL flask, and 60 g of n-butanol was added thereto to prepare a n-butanol slurry of silver oxalate.

[0175] At 30°C, 115.58 g (1.5802 moles) of n-butylamine (molecular weight: 73.14, manufactured by Tokyo Chemical Industry Co., Ltd.), 2-ethylhexylamine (molecular weight: 129.25, manufactured by Wako Pure Chemical Industries, Ltd.) were added dropwise to the obtained slurry. An amine mixed solution of 51.06 g (0.3950 mol) of a reagent manufactured by Kogyo Co., Ltd. and 17.02 g (0.1317 mol) of n-octylamine (molecular weight: 129.25, a reagent manufactured by Tokyo Chemical Industry Co., Ltd.).

[...

Embodiment 1

[0180] Embodiment 1 (preparation of silver ink)

[0181] Add dihydroterpineol (16.62g), EC300 (0.86g), and BYK302 (0.78g), stir in an oil bath for 3 hours (100rpm×3hrs), and then Co., Ltd. product, Mazerustar KKK2508) was stirred and kneaded (2 minutes x 3 times), and liquid A was prepared.

[0182] Add 11.54 g of liquid A to 30 g of the surface-modified silver nanoparticles (containing 10% by weight of propylene glycol monobutyl ether) in a wet state obtained in Preparation Example 1, and use a rotation-revolving mixer (manufactured by Kurabo Textile Co., Ltd., Mazerustar KKK2508 ) was stirred (2 minutes × 3 times) and kneaded to obtain gray-black silver ink.

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Abstract

Provided is a conductive ink with which a wiring or electrode that is thick and has excellent conductivity can be formed efficiently. The conductive ink of the present invention comprises surface-modified silver nanoparticles (A) and a solvent (B), wherein the surface-modified silver nanoparticles (A) are silver nanoparticles having surfaces coated with an amine-containing protective agent, and the solvent (B) contains a terpene-based solvent (b-1), a glycol ether-based solvent and / or a glycol ester-based solvent (b-2), the solvent content with a vapor pressure of 0.05-15 mmHg at 30 DEG C being 75 wt% or more with respect to the total amount of solvent.

Description

technical field [0001] The present invention relates to a conductive ink for use such as forming wiring on a printed circuit board. This application claims the priority of Japanese Patent Application No. 2018-099041 filed in Japan on May 23, 2018, and uses the content thereof here. Background technique [0002] Since silver nanoparticles can be sintered at low temperature, they have been used for forming electrodes, wiring, and the like on plastic substrates. In addition, it is known that silver nanoparticles can be dispersible by coating the surface with a protective agent because they are easily aggregated. Moreover, the conductive ink whose surface is coated with silver nanoparticles dispersed in a solvent can be coated on the substrate to form a coating film in the shape of a wiring pattern, and the coating film is dried and sintered to form a conductive ink. the wiring. [0003] Therefore, the protective agent requirement for silver nanoparticles can be rapidly remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/037H01B1/00H01B1/22H01B5/14H05K1/09H05K3/12C09C1/62C09C3/08
CPCC09C1/62C09C3/08C09D11/037C09D11/52H01B1/00H01B1/22H01B5/14H05K1/09H05K3/12C09D11/033
Inventor 中川政俊
Owner DAICEL CHEM IND LTD
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