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A method for improving the dispersibility of titanium dioxide

A titanium dioxide, dispersibility technology, applied in chemical instruments and methods, dyeing low-molecular organic compound treatment, inorganic pigment treatment, etc., can solve the problem of poor dispersibility of titanium dioxide

Active Publication Date: 2018-08-14
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor dispersibility of titanium dioxide processed by the prior art, and provide a method for improving the dispersibility of titanium dioxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example is used to illustrate the method for improving the dispersibility of titanium dioxide according to the present invention.

[0027] Add titanium dioxide and dispersant (aminomethylsiloxane emulsion) with a moisture content of 0.04% by weight after drying to the jet mill according to the ratio of dispersant weight:titanium dioxide weight=0.02:1, feed steam, and steam pressure It is 2.5MPa, and the first jet milling is carried out under the condition that the weight ratio of steam to titanium dioxide is 3.5:1. Put the material after the first jet milling into the jet mill again, feed steam, the steam pressure is 1.5MPa, carry out the second jet milling under the condition that the weight ratio of steam to titanium dioxide is 3:1, and obtain the final Titanium dioxide products. The dispersibility of the detected titanium dioxide is 7.0, the hiding power in the acrylic paint (with a pigment volume concentration of 20%) is 90.3%, and the 60° gloss is 80.

Embodiment 2

[0029] This example is used to illustrate the method for improving the dispersibility of titanium dioxide according to the present invention.

[0030] Put titanium dioxide and dispersant (silane coupling agent) with a water content of 0.03% by weight after drying into the jet mill according to the ratio of dispersant weight: titanium dioxide weight = 0.003:1, and feed steam with a steam pressure of 1.0 MPa. The first jet milling was carried out under the condition that the weight ratio of steam to titanium dioxide was 1:1. Put the material after the first jet milling into the jet mill again, feed steam, the steam pressure is 0.5MPa, and carry out the second jet milling under the condition that the weight ratio of steam to titanium dioxide is 3:1 to obtain the final Titanium dioxide products. The dispersibility of titanium dioxide was 6.75, the hiding power in acrylic paint (20% pigment volume concentration) was 89.5%, and the 60° gloss was 78.

Embodiment 3

[0032] This example is used to illustrate the method for improving the dispersibility of titanium dioxide according to the present invention.

[0033] Put titanium dioxide and dispersant (aluminate coupling agent) with a water content of 0.05% by weight after drying into the jet mill according to the ratio of dispersant weight: titanium dioxide weight = 0.01:1, feed steam, and the steam pressure is 1.8 MPa, the first jet milling was carried out at a weight ratio of steam to titanium dioxide of 2.1:1. Put the material after the first jet milling into the jet mill again, feed steam, the steam pressure is 1.0MPa, carry out the second jet milling under the condition that the weight ratio of steam to titanium dioxide is 2:1, and obtain the final Titanium dioxide products. The dispersibility of the detected titanium dioxide is 6.75, the hiding power in the acrylic paint (with a pigment volume concentration of 20%) is 89.3%, and the 60° gloss is 77.

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Abstract

The invention relates to the field of chemical engineering, and discloses a method for improving the dispersibility of titanium dioxide powder. The method includes carrying out gas flow smashing on the titanium dioxide powder twice at least in the presence of dispersing agents. The method has the advantages that the dispersing agents can be uniformly mixed with the titanium dioxide powder and uniformly wrap the titanium dioxide powder by means of gas flow smashing, accordingly, the dispersibility of the titanium dioxide powder can be improved, and the application performance such as hiding powder and the glossiness of the titanium dioxide powder can be enhanced.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for improving the dispersibility of titanium dioxide. Background technique [0002] Titanium dioxide has stable chemical properties, high refractive index, high opacity, high hiding power, good whiteness, and is non-toxic. It is widely used in coatings, plastics, papermaking, inks, cosmetics and other fields. The prerequisite for these excellent properties to be displayed is good dispersion. Only titanium dioxide with good dispersibility can show excellent properties such as high tinting strength, hiding power, gloss and weather resistance during application. Therefore, the dispersibility of titanium dioxide is one of the key factors to determine the application performance. [0003] At present, there are two techniques for improving the dispersibility of titanium dioxide. One is to add an organic treatment agent (such as silicone emulsion or TMP) to wrap the surface o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/08C09C3/12
CPCC01P2006/22C09C1/3638C09C1/3669C09C1/3684C09C3/006C09C3/045
Inventor 李礼杜剑桥刘婵吴健春王斌
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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