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Aqueous bronze powder preparation method

A copper-gold powder, water-based technology, used in chemical instruments and methods, inorganic pigment treatment, dyeing low-molecular-weight organic compound treatment, etc. Destruction, good dispersibility, good water solubility

Inactive Publication Date: 2013-10-02
HEFEI SUNRISE PIGMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pH value of water-based ink is weakly alkaline, copper-gold powder is prone to oxidation and corrosion in weakly alkaline water-based printing media, which causes many problems in the transformation of gold ink from solvent-based to water-based, such as copper-gold powder loses luster, Difficult to disperse, high viscosity of gold ink, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of water-based copper-gold powder comprises the steps:

[0024] Step a. Wash the flaky copper and gold powder milled by a ball mill in a cleaning tank with a ketone solvent, and after cleaning for 1-2 hours, press filter and separate solid and liquid to obtain a filter cake with a solid content of 80-85%;

[0025] Step b. Add 30 parts by weight of filter cake, 60 parts of ethanol solvent, 0.1 part of isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) titanate in reaction vessel, 30-40°C Stir for 0.5-1h;

[0026] Step c. Take 0.3 parts of 25% ammonia water and 2 parts of distilled water, mix ammonia water and distilled water, and dilute with 5 parts of ethanol solvent; take 2.5-3.5 parts of tetraethyl orthosilicate, dilute with 5 parts of ethanol solvent; mix the above two Add dropwise to the reaction container at the same time, keep the dropwise addition for 0.5-1h, and the reaction temperature is 45°C;

[0027] Step d. Aging for 6-10h, ...

Embodiment 2

[0031] The preparation method of water-based copper-gold powder comprises the steps:

[0032] Step a. Clean the flaky copper and gold powder milled by a ball mill in a cleaning tank with a ketone solvent. After cleaning for 1-2 hours, press filter and separate solid and liquid to obtain a filter cake with a solid content of 80-85%;

[0033] Step b. Add 30-40 parts by weight of filter cake, 65 parts of isopropanol, and 0.3 part of isopropyl trioleate acyloxy titanate into the reaction vessel, and stir at 30-40°C for 0.5-1h;

[0034] Step c. Take 0.6 parts of 25% ammonia water, 2 parts of distilled water, mix ammonia water and distilled water, and dilute with 5 parts of isopropanol; take 3 parts of tetraethyl orthosilicate, dilute with 5 parts of isopropanol; Add dropwise to the reaction container at the same time, keep the dropwise addition for 0.5-1h, and the reaction temperature is 45°C;

[0035] Step d. Aging for 6-10h, taking out, press filtration, and solid-liquid separat...

Embodiment 3

[0039] The preparation method of water-based copper-gold powder comprises the steps:

[0040] Step a. Clean the flaky copper and gold powder milled by a ball mill in a cleaning tank with a ketone solvent. After cleaning for 1-2 hours, press filter and separate solid and liquid to obtain a filter cake with a solid content of 80-85%;

[0041] Step b. Add 40 parts by weight of filter cake, 70 parts of n-propanol, and 0.5 part of isopropyl titanate tristearate compound into the reaction vessel, and stir at 30-40° C. for 0.5-1 h;

[0042] Step c. Take 1.0 parts of 25% ammonia water, 2.5 parts of distilled water, mix ammonia water with distilled water, and dilute with 5 parts of n-propanol; take 3.5 parts of tetraethyl orthosilicate, dilute with 5 parts of n-propanol; Add dropwise to the reaction container at the same time, keep the dropwise addition for 0.5-1h, and the reaction temperature is 45°C;

[0043] Step d. Aging for 6-10h, taking out, press filtration, and solid-liquid se...

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PUM

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Abstract

The invention discloses an aqueous bronze powder preparation method. The method comprises the following steps: cleaning sheet bronze powder ball-milled in a ball mill with a ketone solvent in a cleaning tank, press-filtering, and carrying out solid-liquid separation to obtain a filter cake; adding the filter cake, an alcoholic solvent and a titanate coupling agent to a reaction container, and stirring; taking ammonia water and distilled water, and mixing ammonia water with distilled water for dilution; taking ethyl orthosilicate, and diluting with the alcoholic solvent; simultaneously adding to the reaction container in a dropwise manner; ageing for 6-10h, taking out, press-filtering, and carrying out solid-liquid separation to obtain inorganic silicon coated bronze powder; taking the inorganic silicon coated bronze powder and an ether solvent, and uniformly dispersing the inorganic silicon coated bronze powder in the ether solvent; and taking a hydrophilic ester monomer and an azo initiator, adding to the reactor, coating, taking out, press-filtering, and carrying out solid-liquid separation to obtain aqueous bronze powder. The method adopts an organic-inorganic double layer coating modifying treatment process to prepare the aqueous bronze powder, so the aqueous bronze powder has a high controlled release efficiency and does not change its color for a long time in alkaline printing ink.

Description

technical field [0001] The invention relates to a preparation method of water-based copper-gold powder. Background technique [0002] Copper gold powder is an extremely fine scaly metal powder made of copper and zinc as the main raw materials through special mechanical processing and surface chemical treatment. The thickness of the sheet is generally 0.1~1μm. (Used to blend copper and gold powder to become ink and a linking material for printing gold) or varnish to form a golden yellow gold lacquer, which makes the outer packaging of the product achieve the effect of golden walls and is deeply loved by people. [0003] At present, the ink widely used in the packaging and printing industry uses organic solvents as the carrier, and the content of volatile organic compounds (VOC) in the ink is 30% to 70%, which causes environmental pollution and damages human health. Water-based inks can significantly reduce the volatilization of VOCs into the air during the printing process, ...

Claims

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Application Information

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IPC IPC(8): C09C1/66C09C3/08C09C3/06C09C3/10
Inventor 董前年朱双单
Owner HEFEI SUNRISE PIGMENTS
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