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Surface organic modification method for titanium dioxide pigment

A titanium dioxide pigment, rutile titanium dioxide technology, applied in the field of chemical industry, can solve the problems of easy agglomeration, poor dispersion, poor light stability and easy color change, etc., to facilitate dispersion, improve dispersibility and coloring power, prevent re-clumping effect

Inactive Publication Date: 2016-03-09
GAOYOU HUABAO PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, ordinary titanium dioxide has poor light stability and is easy to change color. At the same time, it is not well dispersed in solvent dispersion, and it is easy to agglomerate when crushed. The coloring power and hiding power still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First, add 25 parts of water to 100 parts by weight of rutile titanium dioxide and stir at high speed to form a slurry, then put in 10 parts of bentonite SD-2, 5 parts of aluminum oxide, and 5 parts of diethyl zinc and stir evenly , and finally put in 2 parts of acrylamide and 2 parts of methanol, stir and react for 2 hours, filter the slurry, and dry it naturally or at 40-60 ° C, and finally dry and grind it. This product is uniform in color and is in the form of a loose powder with a smooth and fluffy feel. Spray the product on the phosphating plate, the thickness of the coating film is controlled at 50-70 microns, and then pass the artificial weathering resistance test (GB / T1865-1997) for 1000 hours, the discoloration is less than 2 grades, the loss of light is less than 1 grade, and there is no chalking , blistering, cracking or peeling.

Embodiment 2

[0013] First, add 25 parts of water to 100 parts by weight of rutile titanium dioxide and stir at high speed to form a slurry, then put in 5 parts of bentonite SD-2, 2 parts of aluminum oxide, and 10 parts of lithium zincate and stir evenly , and finally put in 8 parts of asparagine and 2 parts of methanol, stir and react for 2 hours, filter the slurry, and dry it naturally or at 40-60 ° C, and finally dry and grind it. This product is uniform in color and is in the form of a loose powder with a smooth and fluffy feel. Spray the product on the phosphating plate, the thickness of the coating film is controlled at 50-70 microns, and then pass the artificial weathering resistance test (GB / T1865-1997) for 1000 hours, the discoloration is less than 2 grades, the loss of light is less than 1 grade, and there is no chalking , blistering, cracking or peeling.

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PUM

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Abstract

The invention discloses a surface organic modification method for titanium dioxide pigment. The surface organic modification method for the titanium dioxide pigment comprises the following steps: adding 10-50 parts of solvent into 100 parts of rutile titanium dioxide, uniformly stirring for forming slurry, then sequentially adding 5-12 parts of bentonite SD-2, 2-7 parts of aluminium oxide powder and 5-15 parts of organic zinc compound and uniformly stirring, then sequentially adding 1-12 parts of amide compound and 1-5 parts of methanol, stirring for reacting for 0.5-2 hours, and finally filtering, baking, drying and grinding, so that surface organic modification on the titanium dioxide pigment is completed. When the obtained titanium dioxide pigment is applied to a coating, the rheology state of the titanium dioxide pigment in a coating solution can be obviously improved, and the dispersibility of the titanium dioxide pigment is improved; meanwhile, the titanium dioxide pigment is stronger in photostability and has higher weather resistance.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to the modification formula technology of titanium dioxide white pigment. Background technique [0002] As a colored substance for decoration and protection, pigments can be used in various fields such as ink, plastics, rubber, coatings, and papermaking in a dispersed state. White opaque pigments are mainly titanium pigments, and R-type titanium dioxide is an important choice. However, the ordinary titanium dioxide has poor light stability and is easy to change color. At the same time, it is not well dispersed in solvent dispersion, and it is easy to agglomerate when crushed. The coloring power and hiding power still need to be improved. Contents of the invention [0003] Purpose of the invention: In view of the above-mentioned existing problems and deficiencies, the purpose of this invention is to provide a method for organically modifying ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08
Inventor 姚涌
Owner GAOYOU HUABAO PIGMENT
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