Silver particle coating composition
A technology of composition and silver particles, applied in conductive coatings, dyed low molecular organic compound treatment, coating and other directions, can solve the problem of insufficient conductive performance, and achieve the effect of low resistance value and excellent conductivity
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Embodiment 1
[0231] (Preparation of silver nanoparticles)
[0232] 40.0 g (0.1317 mol) of silver oxalate was placed in a 500 mL flask, and 60 g of n-butanol was added thereto to prepare a n-butanol slurry of silver oxalate. An amine mixed solution of 115.58 g (1.5802 mol) of n-butylamine, 51.06 g (0.3950 mol) of 2-ethylhexylamine, and 17.02 g (0.1317 mol) of n-octylamine was added dropwise to the slurry at 30°C. After the dropwise addition, the mixture was stirred at 30° C. for 1 hour to perform a complex formation reaction between silver oxalate and amine. After the silver oxalate-amine complex was formed, it was heated at 110° C. to thermally decompose the silver oxalate-amine complex to obtain a suspension in which dark blue silver nanoparticles were suspended in the amine mixed solution.
[0233] The obtained suspension was cooled, 120 g of methanol was added thereto and stirred, and silver nanoparticles were precipitated by centrifugation, and the supernatant was removed. Next, 120 ...
Embodiment 2
[0248] (Preparation of silver ink)
[0249] A silver ink was obtained in the same manner as in Example 1 except that 2.25 g of AG-2-1C as silver fine particles was changed to 2.25 g of Silbest TC-905C (manufactured by Tori Chemical Laboratories Co., Ltd.).
[0250] (Printability of silver ink)
[0251] As a result of evaluating printability in the same manner as in Example 1, it was confirmed by CCD observation that thin lines with a line width of 10 μm and a line width of 20 μm could be transferred. Ink residue on the blanket was not observed visually.
[0252](Firing of silver ink: Conductivity evaluation)
[0253] Baking was performed at 120° C. for 30 minutes in the same manner as in Example 1 to form a 7 μm thick silver fired film. The resistivity value of the obtained silver baked film was measured by the 4-terminal method, and it showed the favorable electrical conductivity of 18 microΩcm. The firing conditions were set at 150° C. for 30 minutes, and the resistivity...
Embodiment 3
[0255] (Preparation of silver ink)
[0256] Mix 2.0 g of 1,4-butanediol diacetate (1,4-BDDA, manufactured by Daicel) in 0.9 g of vinyl chloride-vinyl acetate copolymer resin (SOLBINE AL, manufactured by Nissin Chemical Industry Co., Ltd.) and dissolve it while heating to 100°C. To this, 1.6 g of butyl carbitol (manufactured by Tokyo Chemical Industry Co., Ltd.) and 0.5 g of polyether-modified polydimethylsiloxane BYK302 (manufactured by BYK Chemie Japan Co., Ltd.) were added and stirred to prepare Liquid II .
[0257] 1.25 g of the obtained liquid II was measured. Measure 1.5 g of the above-mentioned silver nanoparticles in a wet state containing 10 wt % of butyl carbitol and 2.25 g of silver microparticles (AG-2-1C, manufactured by DOWA Electronics Co., Ltd.), and add 1.25 g of the above-mentioned silver particles to these silver particles. The liquid II was stirred and kneaded for 30 seconds with an autorotation-revolution kneader (manufactured by Kurabo Spinning Co., Ltd...
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