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Method for performing film coating on aluminum powder pigment by virtue of anchoring agent

An anchoring agent and film coating technology, applied in inorganic pigment processing, chemical instruments and methods, fibrous fillers, etc., can solve the problems of product quality and safe production, and achieve excellent storage stability, uniform coating, Good dispersion effect

Inactive Publication Date: 2014-09-10
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for film-coating aluminum powder pigments with an anchoring agent, so as to solve the problem that product quality and safe production cannot be balanced in the prior art

Method used

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  • Method for performing film coating on aluminum powder pigment by virtue of anchoring agent
  • Method for performing film coating on aluminum powder pigment by virtue of anchoring agent
  • Method for performing film coating on aluminum powder pigment by virtue of anchoring agent

Examples

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Embodiment 1

[0032] Embodiment 1 (comparison formula)

[0033] 100g aluminum silver paste (74%wt% aluminum powder content, surface area 343m 2 ) and 200g of isopropanol were evenly mixed into the reactor, and stirred at 40°C for 1h. Add dropwise at a constant rate within 4 hours: ① Mixed solution of 30ml (0.1346mol) ethyl orthosilicate, 20ml (0.08547mol) silane coupling agent KH550 and 50ml isopropanol, ② 16ml water, 7.1ml concentrated ammonia water and 50ml Mixed solution of isopropanol. Then react at a constant temperature of 40°C for 6h. Finally, it was naturally cooled to room temperature, aged for 12 hours, and suction-filtered to obtain an inorganic / organosilicon-coated aluminum powder pigment. Particle size distribution: 10μm~35μm.

Embodiment 2

[0035] Aluminum silver paste 100g (surface area 343m 2), and 200ml of isopropanol were evenly mixed into the reactor, and stirred at 40°C for 1h. Add 60ml of ammonia-ammonium sulfate buffer solution with pH=8.8 to dissolve 1g (0.004mol) CuSO at a constant rate within 25 minutes 4 ·5H 2 O the resulting solution; then add dropwise a mixed solution of 30ml (0.1346mol) tetraethyl orthosilicate, 20ml (0.08547mol) silane coupling agent KH550 and 50ml of isopropanol at a constant rate within 3h, react at a constant temperature of 40°C for 6h and then suction filter , to get aluminum powder pigment. Particle size distribution: 12μm~30μm.

Embodiment 3

[0037] Aluminum silver paste 100g (surface area 343m 2 ) and 200ml of isopropanol were evenly mixed into the reactor, and stirred at 40°C for 2h. Add 60ml of ammonia-ammonium chloride buffer solution with pH = 9.2 to dissolve 0.6g (0.0024mol) CuSO at a constant rate within 25 minutes 4 ·5H 2 O the resulting solution; then add dropwise a mixed solution of 30ml (0.1346mol) ethyl orthosilicate, 20ml (0.08547mol) KH550 and 50ml isopropanol in 3 hours, and suction filter after 6 hours of constant temperature reaction at 40°C to obtain aluminum powder pigment. Particle size distribution: 11 μm ~ 28 μm.

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Abstract

The invention discloses a method for performing film coating on an aluminum powder pigment by virtue of an anchoring agent. The method comprises the following steps: adding aluminum silver paste and isopropanol into a reaction container, mixing at 40-45 DEG C, and adding an anchoring agent solution; dropwise adding a mixture of organic siloxane, a silane coupling agent and isopropanol; performing stirring reaction at 40-45 DEG C for 5-7 hours, cooling obtained aluminum powder pigment suspension liquid to room temperature, and filtering, wherein the volume ratio of isopropanol to water in a system is shown in the specification; the anchoring agent is sulfate or chloride of Cu<2+>, Ni<2+>, Co<2+> and Cr<3+>; when the surface area of aluminum powder is 343m<2>, 0.0004-0.004mol of the anchoring agent is used; organic siloxane is tetraethoxysilane, aminopropyl triethoxysilane, vinyl trimethoxy silane or epoxy trimethoxy silane. The aluminum powder pigment prepared by adopting the method is good in alkali corrosion resistance and glossiness and is good in dispersity in an aqueous system.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal pigments, in particular to a method for film-coating aluminum powder pigments with an anchoring agent. Background technique [0002] With the enhancement of people's awareness of environmental protection and the improvement of environmental protection regulations, traditional solvent-based paints are gradually replaced by more environmentally friendly water-based paints. However, the preparation and storage of the most typical acrylic water-based paints are carried out under weakly alkaline conditions. of. When flaky aluminum pigments are used in water-based paints, the reaction of the aluminum pigments with alkali or water will not only weaken the metallic luster of the aluminum pigments, but more importantly, the resulting hydrogen will also induce the danger of explosion, which will affect the production And applications bring great security risks. Therefore, it is particul...

Claims

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Application Information

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IPC IPC(8): C09C1/64C09C3/06C09C3/08C09C3/12
Inventor 马志领位会棉李翠翠
Owner HEBEI UNIVERSITY