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Composite coloring pearlescent pigment and preparation thereof

A pearlescent pigment and composite coloring technology, applied in the directions of inorganic pigment processing, fibrous fillers, chemical instruments and methods, etc., can solve the problems of uneven quality of pearlescent pigments, urgent need for innovation in technology, lack of good varieties, etc., and achieve excellent gloss. , complete color spectrum, colorful effect

Inactive Publication Date: 2013-04-03
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the preparation technology of pearlescent pigments has made considerable progress, there are still problems such as uneven quality of pearlescent pigments, lack of excellent varieties, and urgent need for technological innovation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Put 25g of mica into 250mL water to form a suspension, and adjust the pH of the suspension to 1.5 with 6.0mol / L hydrochloric acid, and stir evenly to obtain the reaction mother liquor.

[0022] b. Mix 60mL of 4mol / L titanium tetrachloride solution and 60mL of 0.126mol / L cerium nitrate solution to form a mixed solution, and add the mixed solution at 0.5mL / min to the reaction mother liquor under the condition of 70-90℃ water bath, At the same time, stir continuously at 350r / min to promote the uniform reaction among the components in the system. After the liquid addition is completed, continue stirring for 30 min to obtain a reaction mixture.

[0023] c. Add 3.0 mol / L sodium hydroxide solution to adjust the pH value of the reaction mixture to 8, and then uniformly stir the reaction for 30 min to obtain the product turbid liquid.

[0024] d. The product turbid liquid was subjected to solid-liquid separation, and the resulting solid matter was dried.

[0025] e. Calcini...

Embodiment 2

[0028] a. Put 25g of mica into 275mL water to form a suspension, and adjust the pH of the suspension to 3 with 5.0mol / L hydrochloric acid, stir well to obtain the reaction mother liquor,

[0029] b. Mix 4mol / L titanium tetrachloride solution, 4mol / L titanyl sulfate solution, 0.252mol / L cerium nitrate solution and 0.044mol / L europium nitrate solution according to the same volume ratio to form a 120mL mixture solution, the mixed solution was added to the reaction mother liquid under the condition of 85°C water bath at 0.8mL / min, and at the same time, it was continuously stirred at 200r / min to promote the uniform reaction among the components in the system. After the liquid addition was completed, the reaction was continued for 40 min, the reaction mixture was obtained.

[0030] c. Add 3.4 mol / L sodium hydroxide solution to adjust the pH value of the reaction mixture to 8, then uniformly stir the reaction for 40 min to obtain the product turbid liquid.

[0031] d. implement soli...

Embodiment 3

[0035] a. Put 25g of mica into 300mL water to form a suspension, and adjust the pH of the suspension to 4.5 with 4.0mol / L hydrochloric acid, and stir evenly to obtain the reaction mother liquor.

[0036] b. Mix 5mol / L titanium tetrachloride solution, 0.252mol / L cerium nitrate solution, 0.044mol / L europium nitrate solution and 0.012mol / L erbium nitrate solution according to the volume of 3:2:2:1 Proportionally mixed to form a 120mL mixed solution, the mixed solution was added to the reaction mother liquor under the condition of 90°C water bath at 0.8mL / min, while stirring continuously at 450r / min to promote the uniform reaction between the components in the system, and the liquid addition was completed Afterwards, the reaction was continued for 25 min to obtain a reaction mixture.

[0037] c. Add 3.3 mol / L sodium hydroxide solution to adjust the pH value of the reaction mixture to 9, then uniformly stir and react for 30 min to obtain the product turbid liquid.

[0038] d imple...

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Abstract

The invention discloses a composite coloring pearlescent pigment, which is formed by coating a mica base material with titanium oxide and transition metal oxide and is provided with a layered oxide outer membrane structure. A preparation method of the pearlescent pigment comprises the steps of adjusting a pH value of a suspension formed by uniformly mixing mica and water to be 1.5-4.5, obtaining a reaction mother solution, adding a titanium compound and a mixed solution of transition metal water soluble salt to the reaction mother solution, uniformly stirring, obtaining a reaction mixture, adjusting a pH value of the reaction mixture to be 8-10, obtaining a turbid solution, conducting solid-liquid separation, drying, obtaining a solid matter, thoroughly roasting the dried solid matter at 600-1000 DEG C, cooling, and obtaining the composite coloring pearlescent pigment. According to the composite coloring pearlescent pigment, as an outer membrane coating coated by titanium oxide and transition metal oxide is formed, the composite coloring pearlescent pigment has effects with relatively complete color spectrum and relatively showy color, has relatively excellent glossiness, and has a relatively wide application scope.

Description

technical field [0001] The invention relates to a preparation method of a pearlescent pigment, in particular to a preparation method of a composite colored pearlescent pigment. Background technique [0002] So far, there are many methods for preparing pearlescent pigments, which can be roughly divided into single-layer coating method and composite coating method. [0003] The single-layer coating method uses natural or synthetic mica flakes with a certain diameter-to-thickness ratio as the base material, and coats a layer of metal oxide coating on its surface to prepare pearlescent pigments. The pearlescent pigment obtained by single-layer coating has a planar sandwich structure very similar to natural pearls, which can exhibit specific pearlescent luster and certain color, but the color spectrum is not rich enough. [0004] The composite coating method can obtain pearlescent pigments with complete color spectrum, bright colors and certain hiding power, which is mainly ach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/06
Inventor 钱庆荣周为明陈庆华张华集陈荣国黄宝铨肖荔人刘欣萍许兢杨松伟
Owner FUJIAN NORMAL UNIV
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