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Novel pearlescent pigment and preparation method thereof

A pearlescent pigment, a new type of technology, applied in the preparation of dyed pigments by PVD/CVD method, inorganic pigment processing, chemical instruments and methods, etc., can solve the problems of low extinction coefficient, difficult to apply pearlescent pigment outer coating, etc., to achieve wear resistance Good performance, improve thermal stability, improve wear resistance

Inactive Publication Date: 2018-06-29
SHANGHAI LANGYI FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most aluminum nitride products on the market are in the form of powder particles, which are synthesized by burning aluminum powder in high-pressure nitrogen gas. This synthesis process is difficult to apply to the outer layer of pearlescent pigments, so although aluminum nitride films have high Low extinction coefficient and other advantages, but there are few pearlescent pigments coated with aluminum nitride film on the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 50g of 10-30 micron mica flake powder into the magnetron sputtering vacuum chamber, evacuate, and inject 50 sccm argon gas and 25 sccm nitrogen gas. Use aluminum with a purity of 99.5% as the sputtering target, set the sputtering current to 8A, control the reactive sputtering time for 20 minutes, and coat the surface of the mica sheet with an aluminum nitride coating with a thickness of about 1 micron. After the completion, the powder is taken out to obtain a 10-30 micron natural mica-based aluminum nitride pearlescent pigment. The appearance color of the aluminum nitride pearlescent pigment is milky white, and its pearlescent effect is similar to that of the same particle size pearlescent pigments on the market.

Embodiment 2

[0014] Put 60g of 90-230 micron glass flake powder into the magnetron sputtering vacuum chamber. Vacuumize and feed 70 sccm argon and 42 sccm nitrogen. Metal aluminum with a purity of 99.9% was used as the sputtering target, and the sputtering current was set at 10A. Control the reaction sputtering time for 30 minutes, and coat the aluminum nitride coating with a thickness of about 0.1 micron on the surface of the glass flakes. After the completion, the powder is taken out to obtain a glass flake-based aluminum nitride pearlescent pigment of 90 to 230 microns. The aluminum nitride pearlescent pigment has high flicker sharpness, and the appearance color is transparent and slightly milky white, and the appearance effect is close to that of glass-based pearlescent pigments on the market.

Embodiment 3

[0016] Put 20g of 90-230 micron glass flake powder into the magnetron sputtering vacuum chamber. Vacuumize and feed 40 sccm argon and 16 sccm nitrogen. Metal aluminum with a purity of 99.8% was used as a sputtering target, and the sputtering current was set at 7A. Control the reaction sputtering time for 60 minutes, and coat the aluminum nitride coating with a thickness of about 0.5 microns on the surface of the glass flakes. After the completion, the powder is taken out to obtain a 1-10 micron artificially synthesized mica-based aluminum nitride pearlescent pigment. The aluminum nitride pearlescent pigment has a delicate effect and a milky white appearance, and the spraying effect is consistent with that of the same substrate and particle size pearlescent pigments on the market.

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PUM

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Abstract

The invention relates to a novel pearlescent pigment which takes aluminum nitride as a cladding layer. The cladding layer is plated on the surface of a matrix layer through a reactive sputtering technology. Metal aluminum with the purity higher than 98 percent is used as a sputtering target; the sputtering current is 7 to 10A and the sputtering time is 20 to 60min; nitrogen gas with the purity higher than 99 percent is used as reaction gas and the volume flow ratio of the nitrogen gas to argon gas is 0.25 to 1. The novel pearlescent pigment provided by the invention has the beneficial effectsthat (1) the novel pearlescent pigment is green and environmentally friendly; (2) the cost is reduced; (3) the wear resistance is good; (4) the stability is good.

Description

Technical field: [0001] The invention relates to a pearlescent pigment and a preparation method thereof, in particular to a pearlescent pigment whose coating layer is aluminum nitride and a preparation method thereof. technical background: [0002] Pearlescent pigments are widely used in plastics, paints, cosmetics and other fields. Most of the existing synthetic pearlescent pigments adopt a coated structure: the inner layer is a sheet structure with a low refractive index, such as mica flakes, glass flakes, etc.; the outer layer is coated with one or more layers of high refractive index film layer, such as titanium dioxide, ferric oxide, etc. [0003] Aluminum nitride film has the advantages of high refractive index, high transmittance, low extinction coefficient, etc., and can be applied to the outer coating of pearlescent pigments. In the research on the optical properties of aluminum nitride, Yim et al. obtained high-quality aluminum nitride, the refractive index of po...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C1/40C09C3/06
CPCC09C1/0015C01P2004/61C01P2006/21C01P2006/37C09C3/063C09C2200/102C09C2200/401C09C2220/20
Inventor 逯琪董建廷张文彬唐晓峰
Owner SHANGHAI LANGYI FUNCTIONAL MATERIALS
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