Composite white pigment and preparation method thereof

A technology for white pigments and mixtures, applied in the field of composite white pigments and their preparation, can solve the problems of complex core treatment process and strict raw material treatment requirements, and achieve the effects of cost reduction, uniform TiO2 coating and high covering power

Inactive Publication Date: 2013-03-27
FUJIAN NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention has strict requirements on raw material processing, complex kernel processing technology, special adhesives and higher temperatures, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Wash the filter residue with water to pH = 8, dry, and break up into a pre-treatment filter residue. A certain amount of filter residue was weighed and mixed with water to prepare a suspension with a solid content of 30 wt%, and sodium silicate accounting for 0.5 wt% of the dry powder of the filter residue was added, and placed in a stirring tank equipped with grinding media for stirring and grinding. The grinding medium is spherical zirconia with a gradation ratio of φ3mm:φ2mm:φ1mm=5:3:2, and the ball-to-material ratio is 5:1 (mass ratio); the grinding speed is 2000r / min; the grinding time is 30min. Weigh a certain amount of crystal TiO 2 Mix with water to prepare a suspension with a solid content of 35 wt%, and add 0.5 wt% of sodium silicate to the dry powder, place it in a stirring tank and stir at a high speed, the stirring speed is 3000r / min, the stirring time is 20min, and the ultrasonic treatment is 10min . The TiO obtained above 2 Add the suspensio...

Embodiment 2

[0027] Example 2: Wash the filter residue with water to pH=9, dry and break up. Other steps are the same as in Example 1. The hiding power of the obtained composite powder is 17.01g / m 2 , The oil absorption value is 41.05g / 100g, and the whiteness is 90.0%.

Embodiment 3

[0028] Example 3: Wash the filter residue with water to pH=10, dry and break up. Other steps are identical with embodiment 1. The hiding power of the obtained composite powder is 17.22g / m 2 , The oil absorption value is 41.57g / 100g, and the whiteness is 90.0%.

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PUM

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Abstract

The invention discloses a composite white pigment and a preparation method thereof. The composite white pigment uses filter residue generated in the production of sodium silicate as a core, and crystal TiO2 as coating powder, wherein the filter residue mainly comprises quartz powder; the TiO2 is coated on the surface of the filter residue in a wet-process superfine grinding system through mechanical-chemical action, so that the composite powder has the properties of the pigment titanium dioxide. The composite powder disclosed by the invention has the characteristics such as uniform TiO2 coating, firm combination, strong covering power, high whiteness, simple preparation process, low cost and the like. The filter residue/TiO2 composite pigment has covering power and whiteness similar to those of titanium dioxide, can partially substitute titanium dioxide to be applied to the fields such as paint, plastic, printing link and the like for improving the product performance and reducing the cost.

Description

technical field [0001] The invention relates to the technical field of production of composite white pigments, in particular to the surface of the filter residue covered with TiO when water glass is produced. 2 Coated composite white pigment and preparation method thereof. Background technique [0002] Titanium dioxide, that is, titanium dioxide pigment, has high hiding power, high color-removing power, high finish, high whiteness and strong weather resistance due to its superior density, dielectric constant and refractive index. It is also chemically inert, non-toxic, Harmless to the human body and other properties, it is considered to be a white pigment with the best performance in the world at present, and is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. With the development of the world economy, social progress and the improvement of people's living standards, the rapid development of construction a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C1/36C09C3/06C09C3/04
Inventor 童跃进肖志红杨伟华关怀民乐兆鸿颜桂炀
Owner FUJIAN NORMAL UNIV
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