Aureous bead pigment having strong metallic texture and method for producing the same

A metal texture, pearlescent pigment technology, applied in inorganic pigment processing, chemical instruments and methods, fibrous fillers, etc. Strong metallic luster, easy-to-use effect

Active Publication Date: 2008-03-05
SHANTOU LONGHUA PEARL LUSTRE PIGMENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gold color of this pearlescent pigment is relatively light, and the color saturation is not high. In addition, because the pigment contains titanium oxide, the price is still high
[0005] 3. Chinese patent CN1384858 introduces the preparation of super strong golden pearlescent pigments. It adopts wet chemical method to alternately hydrolyze and deposit high refractive index layer and low refractive index oxide layer on the substrate surface. The high refractive index layer is TiO 2 and Fe2O 3 The mixed deposition layer, the low refractive index layer is a silicon dioxide layer, and the high refractive index layer is TiO 2 and Fe 2 o 3 There are strict ratio requirements, which must overcome the problem of determining the hydrolysis pH value caused by the mixing of these two soluble salts. In addition, because the pigment contains titanium oxide, the price cannot be reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] SiO 2 / Fe 2 o 3 / SiO 2 / Fe 2 o 3 / glass sheet / Fe 2 o 3 / SiO 2 / Fe 2 o 3 / SiO 2 The structure of the example;

[0028] Take 120 grams of wet glass powder with a thickness of 1-5 microns and a particle size of 30-150 microns, suspend in 500 ml of deionized water, stir and heat to 75°C.

[0029] The pH value of the suspension was adjusted to 3.5 with 18% hydrochloric acid, and then 98 ml of ferric chloride solution (60 g / l, FeCl 3 .6H 2 O), during this process the pH value of the suspension was kept constant by adding 15% sodium hydroxide dropwise, and when the addition was complete, stirring was continued at constant temperature for 15 minutes.

[0030] The pH was raised to 9.5 with 32% sodium hydroxide solution and stirred for an additional 15 minutes.

[0031] 560 ml of sodium silicate solution (20 g / L of SiO 2 ) was added dropwise, during which 15% hydrochloric acid was added dropwise to make the pH constant, and when the addition was complete, it was st...

Embodiment 2

[0038] With structure Fe 2 o 3 / SiO 2 / Fe 2 o 3 / glass sheet / Fe 2 o 3 / SiO 2 / Fe 2 o 3 For example;

[0039] Take 480 grams of wet glass powder with a thickness of 1-5 microns and a particle size of 30-150 microns, suspend in 3000 ml of deionized water, stir and heat to 75°C.

[0040] The pH value of the suspension was adjusted to 3.5 with 18% hydrochloric acid, and then 505 milliliters of ferric chloride solution (60 g / L, FeCl 3 .6H 2 O), during this process the pH value of the suspension was kept constant by adding 15% sodium hydroxide dropwise, and when the addition was complete, stirring was continued at constant temperature for 15 minutes.

[0041] The pH was raised to 9.5 with 32% sodium hydroxide solution and stirred for an additional 15 minutes.

[0042] 1780 ml of sodium silicate solution (20 g / L of SiO 2 ) was added dropwise, during which 15% hydrochloric acid was added dropwise to make the pH constant, and when the addition was complete, it was stirred ...

Embodiment 3

[0047] With structure Fe 2 o 3 / SiO 2 / Fe 2 o 3 / Muscovite / Fe 2 o 3 / SiO 2 / Fe 2 o 3 For example;

[0048] Take 120 grams of wet muscovite powder with a particle size of 20-80 microns, suspend it in 500 ml of deionized water, stir and heat to 75°C.

[0049] The pH value of the suspension was adjusted to 3.5 with 18% hydrochloric acid, and then 620 milliliters of ferric chloride solution (60 g / L, FeCl 3 .6H 2 O), during this process the pH value of the suspension was kept constant by adding 15% sodium hydroxide dropwise, and when the addition was complete, stirring was continued at constant temperature for 15 minutes.

[0050] The pH was raised to 9.5 with 32% sodium hydroxide solution and stirred for an additional 15 minutes.

[0051] 1075 ml of sodium silicate solution (20 g / L of SiO 2 ) was added dropwise, during which 15% hydrochloric acid was added dropwise to make the pH constant, and when the addition was complete, it was stirred for another 30 minutes.

[...

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Abstract

The present invention provides one kind of golden pearlescent pigment with strong metal texture. The golden pearlescent pigment includes flaky base with at least three layers of alternately coated ferric oxide layer of optical thickness 10-200 nm and silica layer of optical thickness 10-320 nm. The present invention provides also the pigment preparing process, which is one wet chemical hydrolysis process to deposit ferric oxide layers and silica layers on the flaky base. The golden pearlescent pigment has strong golden interference color and brilliancy and brightness greatly than common pearlescent pigments. It has low cost, simple preparation process and stable product quality.

Description

technical field [0001] The invention relates to a colored pigment based on a multilayer-coated platelet-shaped substrate, in particular to a golden pigment based on a multi-layer-coated platelet-shaped substrate, and also relates to a production method of the golden pigment. Background technique [0002] The golden pigments or "gold powder" used in various industries in the past are actually mostly brass alloys composed of copper, zinc and aluminum. The preparation method is: melt and atomize the brass alloy into coarse powder, put it into a wet ball mill The medium-coarse powder with a sheet-like structure is tempered to eliminate internal stress, then crushed by dry ball milling, and finally classified by winnowing, and the surface of the film is polished. This kind of golden pigment has complicated processing technology, is flammable and explosive, and in practical application, it is not resistant to acid, alkali, heat and humidity, has extremely poor weather resistance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/06C09C1/28
Inventor 刘为忠庄育麟
Owner SHANTOU LONGHUA PEARL LUSTRE PIGMENTS CO LTD
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