Coated copper particles and method for producing the same
AssigneeKyoritsu Chemical & Co., Ltd.
InventorsKunihiro Fukumoto, Yu Oyama
Life of this patent
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Abstract
A method for producing coated copper particles having a surface coated with an aliphatic carboxylic acid, wherein the method comprises obtaining a reaction mixture containing copper formate, an amino alcohol, an aliphatic carboxylic acid having an aliphatic group having 5 or more carbon atoms, and a solvent, and subjecting a complex compound formed in the reaction mixture to thermal decomposition treatment to form metal copper, wherein a ΔSP value, which is a difference in SP value between the amino alcohol and the solvent, is 4.2 or more.
Claims22
-6. (canceled)
A coated copper particle containing a copper particle coated with an aliphatic carboxylic acid having an aliphatic group having 5 or more carbon atoms, wherein the coated copper particle has an average primary particle diameter DSEM of 0.02 to 0.2 mm, as determined by a SEM examination, wherein a value of a coefficient of variation of the particle size distribution (standard deviation SD/average primary particle diameter DSEM) is 0.1 to 0.5, and the coated copper particle has a DXRD/DSEM ratio of 0.25 to 1.00 wherein the DXRD/DSEM ratio is a ratio of a crystal particle diameter DXRD, as determined by a powder X-ray analysis, to an average primary particle diameter DSEM, as determined by a SEM examination.
A coated copper particle having a surface coated with an aliphatic carboxylic acid having an aliphatic group having 5 or more carbon atoms, wherein the coated copper particle has a DXRD/DSEM ratio of 0.25 to 1.00 wherein the DXRD/DSEM ratio is a ratio of a crystal particle diameter DXRD, as determined by a powder X-ray analysis, to an average primary particle diameter DSEM, as determined by a SEM examination, and wherein the coated copper particle is a thermal decomposition product of a complex compound formed in a reaction mixture containing copper formate, an amino alcohol, an aliphatic carboxylic acid having an aliphatic group having 5 or more carbon atoms, and a solvent, wherein a DSP value, which is a difference in SP value between the amino alcohol and the solvent, is 4.2 or more.
-11. (canceled)
Dependencies are inferred from the claim text.