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Preparation of high glaze glass-based pearlescent pigment

A pearlescent pigment and high gloss technology, applied in inorganic pigment processing, chemical instruments and methods, fibrous fillers, etc., can solve the problems of difficult to obtain uniform hue pearlescent pigments, affecting coating stability, reducing pearlescent effect, etc. Low cost, chemical solvent resistance, high gloss effect

Inactive Publication Date: 2013-01-02
WENZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, natural mica has its defect as the matrix material of pearlescent pigment: (1) though the mica flake that (1) grinds and classifies by wet grinding method can obtain less thickness and larger diameter-to-thickness ratio (the ratio of mica flake diameter and thickness , generally require >50), but usually have a wide range of thickness distribution (0.2μm-1μm), which is easy to affect the stability of the coating, and it is not easy to produce pearlescent pigments with uniform hue; (2) when coated with metal oxide After the mica sheet is covered, light is scattered due to the step and edge gradient thickness formed by mica peeling, which reduces the pearlescent effect; (3) natural mica contains colored impurity ions such as iron ions, which requires very complicated and time-consuming operations steps to remove these impurity ions
Coating oxides such as titanium dioxide on the surface of glass flakes is quite difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, settle and classify the glass flakes to obtain glass flakes with a thickness of less than 1 μm, and then wash them with 0.5 mol / L HCl and 0.5 mol / L NaOH to make the substrate obtain a new surface. 200-mesh sieve for vacuum sieving to obtain glass flakes with a sheet diameter of 10-100 μm. Use deionized water to prepare the above glass flakes into a 10% aqueous solution of glass flakes (weight ratio), add them to the reaction kettle to make a suspension, and slowly heat to 70 ° C ~ 90 ° C, adjust with 0.1mol / L HCl After the pH value reaches 2.5, add TiCl dropwise at a rate of 0.5-1.0ml / min 4 Solution, add 0.5mol / L NaOH solution dropwise at the same time to keep the pH value stable. The reaction time is 3 to 10 hours (depending on the needs of different products). After the reaction is completed, keep it for 30 minutes and then put it into the washing tank for washing , the above-mentioned glass-based pearlescent pigment is washed to be neutral, filtered, dried at...

Embodiment 2

[0035] The process and steps of this embodiment are exactly the same as those of the above-mentioned embodiment 1, the difference is: after coating TiCl 4 After adding a small amount of coupling agent before, adjust the pH value to less than 2, add SnCl 4 Solution 0.5mL, after adjusting the pH value to 2.5, add TiCl dropwise 4 Solution, according to different products need to add TiCl 4 The amount of solution is different, and finally the pearlescent pigment with smooth surface, dense and uniform, high gloss and high brightness is obtained.

Embodiment 3

[0037] The process and steps of this embodiment are exactly the same as those of the above-mentioned embodiment 2, the difference is: after the coating of TiCl 4 After the solution, adjust the pH value to 3, and add FeCl dropwise at a rate of 0.5-1.0ml / min 3 solution to prepare golden series of glass-based pearlescent pigments.

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Abstract

The invention relates to a high gloss and high brightness pearlescent pigment based on sheet glass and a preparation method thereof, belonging to the technical field of pigment and coating preparation process. The method adopts the sheet glass as base material. First, the sheet glass is processed to lead the thickness between 0.8 and 1.8mu m, the sheet diameter between 10 and 100mu m, the surface to be bright, clean and neat, and the index of refraction between 1.5 and 1.7; second, deionized water is used for matching with the sheet glass to form glass suspension which is added with 20-50 percent of TiCl4 or FeCl3 with the pH value being controlled, then stirred for reaction at the temperature of 80 DEG C, filtered, washed, dried, and calcined at the temperature of 600-900 DEG C; and finally the glass-based pearlescent pigment is obtained. The pearlescent pigment prepared by the invention is good in gloss, high in brightness, stable in chemical property, non-toxic, tasteless, fire-retardant, resistant to acid and alkali, ultraviolet resistant, resistant to chemical solvent and non-conductive and is applicable to paints, coatings, printing ink, plastic, cosmetics and other special functional decorative coatings in space flight, navigation and vehicles.

Description

technical field [0001] The invention relates to a high-gloss glass-based pearlescent pigment, which belongs to the preparation of pearlescent pigments and decorative pigments used in paints, coatings, printing inks, plastics, aerospace, navigation, automobiles, cosmetics and the like. Background technique [0002] The so-called pearlescent pigment is a pigment that imparts pearly luster to the product. It is a film formed by coating a transparent or translucent sheet with one or more layers of titanium dioxide and other metal oxides on its surface using a special chemical process. , is a plane sandwich body very similar in structure to natural pearls. Pearlescent pigments can decompose composite light into various monochromatic lights like a prism, and form various interference colors through light interference, showing Extremely beautiful pearl luster and metallic luster. [0003] Pearlescent pigments based on natural mica have been used for many years, and there are many ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/00
Inventor 梁晓娟向卫东张景峰刘海涛王兆伦林须泽徐燎
Owner WENZHOU UNIV
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