High-purity ferro-titanium pearlescent pigment with bright golden yellow effect and preparation method thereof

Abstract

The invention discloses a high-purity ferro-titanium alloy shiny gold effect pearlescent pigment and a preparation method thereof. The first high-refractive-index oxide layer is tin oxide or zinc oxide, the second and fourth high-refractive-index oxide layers are titanium oxide, and the third and fifth high-refractive-index oxide layers are iron oxide. The product invented is to increase the interface of different substances through multi-layer composite coating of tin oxide, zinc oxide, titanium oxide, and iron oxide. Light can easily propagate along a straight line in the same medium. When encountering the interface of different substances, it will Part of the light is refracted, and the other part is reflected. The light is reflected, refracted, interfered, and superimposed multiple times through the multi-layer metal oxide layer, which enhances the mirror reflection effect of the pearlescent pigment and improves the purity and brightness of the pigment; the production process of the present invention Simple, operable, stable scale production, low cost, suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of pearlescent pigments, in particular to a high-purity titanium-iron alloy shining golden effect pearlescent pigment and a preparation method thereof. Background technique [0002] Gold color is a symbol of wealth, holiness, authority, and dignity. It is a color that is widely respected, loved, and admired by people. The so-called gold color pigment is obtained through the following ways: the first type, lead chrome yellow pigment, It is a golden color and is produced by the reaction of lead nitrate and sodium chromate. Lead chrome yellow pigment is similar to bright gold. It is used in paints and inks because of its bright and pure color and strong hiding power. However, there are three major defects in the application: 1. The color will suddenly become darker during storage; 2. It will easily turn black after being exposed to sunlight; 3. Because the content of heavy metals is not easy to control, the ris...

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Problems solved by technology

[0002] Gold color is a symbol of wealth, holiness, authority, and dignity. It is a color that is widely respected, loved, and admired by people. The so-called gold color pigment is obtained through the following ways: the first type, lead chrome yellow pigment, It is a golden color and is produced by the reaction of lead nitrate and sodium chromate. Lead chrome yellow pigment is similar to bright gold. It is used in paints and inks because of its bright and pure color and strong hiding power. However, there are three major defects in the application: 1. The color will suddenly become darker during storage; 2. It will easily turn black after being exposed to sunlight; 3. Because the content of heavy metals is not easy to control, the risk of use in industries that require heavy metal content is high, which narrows the scope of application; Titanium-nickel yellow pigment, also known as sun gold, is also a gold-colored pigment. It is a series product of sulfuric acid titanium dioxide. It is a solid solution of nickel, antimony and titanium. Titanium-nickel yellow pigment has good chemical stability and is non-toxic. It is widely used in Coatings, but there are big defects in the application: first, the color is light, second, the tinting strength is low, third, the dispersibility is poor, it is not suitable to be used as a gold color pigment alone, so the application is very limited; the third, copper gold powder pigment in To a certain extent, it has a golden-like color sensory effect. It is made by grinding and grading copper powder made of copper alloy. It is a golden-colored pigment widely used in daily chemicals and decorative materials. It has a golden-like texture. It is loved by people, but there are three major defects in the application of copper-gold powder: 1. Copper-gold powder is an ultra-fine powder of copper-zinc alloy. The body is explosive, and there are great hidden dangers in safety production; third, it is risky to use in industries such as food or cosmetics that require heavy metal indicators; the fourth, golden pearlescent pigment, is deposited on mica sheet substrates by chemical deposition or physical The method of absorption is to coat two layers of metal oxides or colored yellow organic pigments to obtain pearlescent pigments. Both methods can obtain pearlescent pigments with golden effect. The former is to coat a certain thickness of titanium oxide and iron oxide on the surface of mica to achieve golden color. The latter is an organic yellow pigment colored by liquid phase adsorption method. Both methods can obtain golden effect pearlescent pigments, but their color saturation, brightness and hiding power are relatively unsatisfactory, and the golden effect produced is similar to natural gold. The texture effect is very different, the film is formed, the color is unfolded, the hue is not golden and pure, and it lacks the shiny golden texture

These defects seriously limit the application of common golden pearlescent pigments; therefore, there are many defects in conventional golden pigments in application

The optical phenomenon of pearlescent pigments is produced by the multi-layer iron oxide, titanium oxide and other metal oxides coated on the surface of the mica substrate, which produce multiple reflections and refractions on the incident light, and then through mutual interference. According to the principle of reflection, refraction, superposition and interference of light, different metal oxide layers with high refractive index are alternately coated on the surface of mica. By controlling the thickness of each coating layer, the The above-mentioned high-purity ferro-titanium alloy shiny golden effect pearlescent pigments can be produced. Common golden pearlescent pigments can be produced by many suppliers at home and abroad, but no pearlescent pigments with high-purity ferrotitanium shiny golden effect have been found. In view of this, this paper The company provides a high-purity ferro-titanium alloy shiny golden effect pearlescent pigment and its preparation method