Fine silver particle dispersion, fine silver particles, and method for producing same

A manufacturing method and dispersion technology, which can be used in cable/conductor manufacturing, manufacturing tools, conductive materials dispersed in non-conductive inorganic materials, etc. The effect of sinterability

Active Publication Date: 2017-05-10
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In addition, in the method for producing silver microparticles of Patent Document 4, it is necessary to add a low-molecular organic compound such as alcohol in order to promote the formation of a complex. In polar solvents, but there is a problem of poor dispersibility in highly polar solvents

Method used

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  • Fine silver particle dispersion, fine silver particles, and method for producing same
  • Fine silver particle dispersion, fine silver particles, and method for producing same
  • Fine silver particle dispersion, fine silver particles, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] Mix 200 ml of toluene (first grade reagent manufactured by Wako Pure Chemical Industries, Ltd.) and 11 g of butylamine (first grade reagent manufactured by Wako Pure Chemical Industries, Ltd., carbon number: 4, logP: 1.0), and stir with a magnetic force (the molar ratio of the added amine relative to the silver is 2.5). While stirring, 10 g of silver nitrate (special grade reagent manufactured by Toyo Chemical Industry Co., Ltd.) was added thereto, and after the silver nitrate was dissolved, 10 g of DISPERBYK-2090 and hexanoic acid were added as a polymer dispersant (Reagent special grade manufactured by Wako Pure Chemical Industries Co., Ltd.) 10 g.

[0145] A 0.02 g / ml sodium borohydride aqueous solution prepared by adding 1 g of sodium borohydride (manufactured by Wako Pure Chemical Industries, Ltd.) to 50 ml of ion-exchanged water was added dropwise thereto to obtain a solution containing silver fine particles. After stirring for 1 hour, 200 ml of methanol (a speci...

Embodiment 2

[0157] 200 ml of toluene (reagent grade 1 manufactured by Wako Pure Chemical Industries Co., Ltd.) and 3-methoxypropylamine (reagent grade 1 manufactured by Wako Pure Chemical Industries Ltd., carbon number: 4, logP: -0.5) 13.4 g was mixed and stirred well with a magnetic stirrer (the molar ratio of the added amine to silver was 2.5). While stirring, 10 g of silver nitrate (special grade reagent manufactured by Toyo Chemical Industry Co., Ltd.) was added thereto, and after the silver nitrate was dissolved, 10 g of DISPERBYK-111 and hexanoic acid were added as a polymer dispersant (Reagent special grade manufactured by Wako Pure Chemical Industries Co., Ltd.) 10 g. A 0.02 g / ml sodium borohydride aqueous solution prepared by adding 1 g of sodium borohydride (manufactured by Wako Pure Chemical Industries, Ltd.) to 50 ml of ion-exchanged water was added dropwise thereto to obtain a solution containing silver fine particles. After stirring for 1 hour, 200 ml of methanol (a special...

Embodiment 3

[0159]8.9 g of 3-methoxypropylamine (reagent grade 1 manufactured by Wako Pure Chemical Industries, Ltd., carbon number: 4, logP: -0.5) and 0.3 g of Despex as a polymer dispersant (DISPERBYK)-111 was mixed and fully stirred with a magnetic stirrer to generate an amine mixed solution (the molar ratio of the added amine to silver was 10). Then, while stirring, 3.0 g of silver oxalate was added. After the silver oxalate was added, stirring was continued at room temperature to change the silver oxalate into a viscous white substance, and the stirring was terminated when the change in appearance was found to be complete (first step).

[0160] The obtained mixed solution was transferred to an oil bath, and heated and stirred at 120°C. The reaction accompanied by the generation of carbon dioxide starts immediately after the stirring is started, and then the stirring is continued until the generation of carbon dioxide is completed, thereby obtaining a suspension in which silver fine ...

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Abstract

Provided are a fine silver particle dispersion which exhibits low temperature sinterability and in which fine silver particles are uniformly dispersed in a variety of solvents (and especially highly polar solvents); fine silver particles that exhibit low temperature sinterability and excellent dispersibility in a variety of solvents (and especially highly polar solvents); a dispersion obtained using the fine silver particles; and a method for producing same. The fine silver particle dispersion is characterized by containing fine silver particles, a short chain amine having 5 or fewer carbon atoms, and a highly polar solvent and in that the partition coefficient (logP) of the short chain amine is -1.0 to 1.4.

Description

technical field [0001] The present invention relates to a silver microparticle dispersion formed by dispersing silver microparticles in various solvents, silver microparticles dispersible in various solvents and a manufacturing method thereof. The silver microparticle dispersion can be widely used to form semiconductor integrated circuits Conductive inks for wiring or electrode patterns, etc., or bonding compositions for low-temperature bonding of electronic components. Background technique [0002] In recent years, low-temperature sinterable conductive inks utilizing metal microparticles, especially silver microparticles (for example, Patent Document 1 (Japanese Patent Laid-Open No. 2013-185213 )) or bonding compositions (for example, Patent Document 2 (Japanese Patent Laid-Open No. Publication No. 2004-107728)) has attracted attention. [0003] At the same time, the development of silver microparticles used in such applications is actively progressing, and various silver ...

Claims

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Application Information

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IPC IPC(8): B22F9/00B22F1/00B22F1/02B22F9/24C09D17/00H01B1/22H01B13/00B22F1/054B22F1/0545B22F1/10B22F1/102B22F1/103B22F1/107
CPCB22F9/24C09D17/00H01B1/22H01B13/00B23K35/025B23K35/3006B22F1/0545B22F1/102B22F1/103B22F1/107B22F1/10B22F1/056B22F2009/245B22F2301/255B22F2302/45B22F2303/01B22F2304/054B22F2304/056B22F2998/10
Inventor 新谷祐树外村卓也
Owner BANDO CHEM IND LTD
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