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Versicolor interference color pearlescent pigment and preparation thereof

A pearlescent pigment and color conversion technology, applied in fibrous fillers and other directions, can solve problems such as weakening interference effect, and achieve the effects of improving color saturation, reasonable structure, and energy-saving preparation process.

Inactive Publication Date: 2009-07-08
林一中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of pigment interference has improved somewhat, but the basic situation of weakening the interference effect has not changed because the absorbing color coating is on the outside.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Suspend 100 grams of mica flakes with a particle size of 10-60 μm in 1000 ml of deionized water, stir evenly, heat up to 75° C., and adjust the pH of the suspension to 2.6 with dilute hydrochloric acid. Then, 167 ml of titanium tetrachloride solution with a concentration of 18% and 270 ml of ferric chloride solution with a concentration of 15.5% were metered in simultaneously, and 10% sodium hydroxide solution was metered in simultaneously to maintain a constant pH value of the suspension. After the addition was complete, the mixture was stirred at constant temperature for another 30 minutes. The pH of the suspension was raised to 9.5 with 10% sodium hydroxide solution and stirred for 20 minutes. 1100 ml of sodium silicate solution with a concentration of 16.4% was slowly added to the suspension, and 10% hydrochloric acid was added dropwise to maintain a constant pH value of the suspension. After the addition was complete, the mixture was stirred at constant temperatur...

Embodiment 2

[0035]Suspend 100 grams of mica flakes with a particle size of 10-60 μm in 1000 ml of deionized water, stir evenly, heat up to 60°C, adjust the pH of the suspension to 8.0 with dilute hydrochloric acid, and stir for 20 minutes. Then, 78 ml of 18% titanium tetrachloride solution and 80 ml of 20% cobalt nitrate hexahydrate solution were metered in at the same time, and 10% sodium hydroxide solution was metered in at the same time to maintain a constant pH value of the suspension. After the addition was complete, the mixture was stirred at constant temperature for another 30 minutes.

[0036] Use 10% sodium hydroxide solution to raise the pH value of the suspension to 9.5, and stir for 20 minutes, slowly add 950ml of 16.4% sodium silicate solution into the suspension, and add 10% hydrochloric acid dropwise to maintain the suspension The pH value is constant. After the addition was complete, the mixture was stirred at constant temperature for another 30 minutes.

[0037] The pH ...

Embodiment 3

[0042] Suspend 100 grams of mica flakes with a particle size of 10-60 μm in 1000 ml of deionized water, stir evenly, heat up to 90° C., and adjust the pH value of the suspension to 8.5 with dilute hydrochloric acid. Then simultaneously metering 140ml of titanium tetrachloride solution with concentration of 18%, 75ml of cobalt chloride hexahydrate solution with 20% concentration, 75ml of zinc chloride solution with 11% concentration and 20% nickel chloride solution with hexahydrate for concentration 135 ml, while metering in 10% sodium hydroxide solution to maintain a constant pH of the suspension. After the addition was complete, the mixture was stirred at constant temperature for another 30 minutes.

[0043] Use 10% sodium hydroxide solution to raise the pH value of the suspension to 9.5, and stir for 20 minutes, slowly add 880ml of 16.4% sodium silicate solution into the suspension, and add 10% hydrochloric acid dropwise to maintain the suspension The pH value is constant. ...

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Abstract

The invention discloses a versicolor interference color nacreous pigment and a preparation method thereof. The nacreous pigment has the following structure: a transparent or semitransparent slice is used as a substrate; a titanate absorption color coating, a transparent middle interlayer and a transparent titanium dioxide interference color coating are coated on the substrate in turn; the outer layer is coated with an outer protective layer; and the transparent middle interlayer is a silicon dioxide coating or an aluminum oxide coating. The interference color pigment is prepared by wet chemical coating technology; the pigment uses the transparent or semitransparent slice as the substrate; and after the titanate absorption color coating, the transparent middle interlayer and the transparent titanium dioxide interference color coating are coated on the substrate in turn, the interference color pigment is once formed by once calcination. The pigment has rich and bright color, has various versicolor effects from a reflected light visual angle to a deviated reflected light visual angle, and can be used in the fields of paint, ink, plastics, cosmetics formulation, decoration material, papermaking, glass and the like.

Description

technical field [0001] The invention relates to a pearlescent pigment and a preparation method thereof, in particular to a color-changing interference color pearlescent pigment and a preparation method thereof. Background technique [0002] When a transparent or translucent sheet such as mica is used as a substrate, when the titanium dioxide coating is coated on the surface of the substrate, as the thickness of the titanium dioxide coating increases, due to the reflection and transmission of light, the parallel reflections between several beams of light will be separated. Interference occurs, and a series of interference light colors are produced, so that interference color pearlescent pigments are obtained. This kind of interference color pigment can display different rainbow-like colors, but there are still two major defects. One is that the color spectrum is incomplete, and the other is that when the viewing angle deviates from the angle of reflected light, the interfere...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00
Inventor 林一中金文松
Owner 林一中
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