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Method for preparing Nano dye

A nano-pigment and pigment technology, which is applied in the fields of fine chemical industry and material science, can solve the problems of wide particle size distribution of modified pigments, large particle size of pigments, and non-nano materials, etc., and achieve stable product quality, small equipment investment, and high production process. simple effect

Inactive Publication Date: 2005-10-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there are many examples of pigment modification by microcapsule method, the modified pigments prepared by them have a wide particle size distribution, and the pigment particle size is relatively large, which is not within the scope of nanomaterials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 7.5 grams of polystyrene and 442.5 grams of acetone into a three-necked flask, and stir with a stirrer for 15 minutes. After the polystyrene is completely dissolved, add 50 grams of azo pigment C.I. Pigment Red 22, and place it on a sand mill for dispersion and grinding 2 hours.

[0020] The dispersed suspension is spray-dried with a spray dryer, and with the evaporation of the solvent, polystyrene is gradually coated on the surface of the pigment to obtain nano-scale pigment powder.

Embodiment 2

[0022] Add 50 grams of phthalocyanine pigment C.I. Pigment Blue 15:2 and 250 grams of water into a three-necked flask, add 10 grams of 30% polyacrylic acid-methyl methacrylate aqueous solution under stirring, and disperse it on a high-speed emulsification disperser After 30 minutes, 10 grams of 30% polyvinylpyrrolidone aqueous solution was added, and the dispersion was continued for 2 hours. Then, slowly add 500 grams of acetone under stirring, and continue stirring for 30 minutes.

[0023] Centrifuge the mixed liquid, remove the solvent in the upper layer after centrifugation, and vacuum-dry the modified pigment at 40° C. for 24 hours to obtain nano-pigment powder.

Embodiment 3

[0025] Add 927.5 grams of tetrahydrofuran and 22.5 grams of butadiene-acrylonitrile-styrene terpolymer in the three-necked flask, stir on the stirrer for 30 minutes, after the polymer is completely dissolved, add 50 grams of quinazetidinones Pigment C.I. Pigment Red 122 was dispersed on a high-pressure micro-jet pulverizer for 2 hours. Under the condition of full stirring, slowly add the mixture of 500 g of cyclohexane and petroleum ether, so that the polymer is deposited on the surface of the pigment. The mixed solution was separated by filtration, the solvent was removed, and it was freeze-dried at -15° C. for 24 hours to obtain nano-pigment powder.

[0026] Add 5 grams of nano-pigment powder into 95 grams of water and stir for 30 minutes to obtain the water-based nano-pigment color paste-C.I. Pigment Red 122 water-based color paste.

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Abstract

The present invention relates to a preparation method of nano pigment. It is characterized by that said invention adopts microcapsule technique to modify the pigment surface to make the surface of modified pigment be covered by polymer so as to prevent agglomeration of pigment granules and obtain the nano pigment with good flowability, dispersibility and stability.

Description

technical field [0001] The invention discloses a preparation method of nano pigment. The nano pigment prepared by the invention has the advantages of simple production process, small equipment investment, stable product quality, etc., and belongs to the fields of fine chemical industry and material science. Background technique [0002] Pigments and dyes are the main coloring substances in nature. Compared with dyes, pigments have higher light fastness, weather fastness and solvent resistance. Spraying and other fields have been widely used. [0003] Pigments mainly exist in the form of aggregates, aggregates or flocs, and the particles are coarse and unevenly distributed, resulting in poor color brilliance and brightness of the pigments. In addition, as a colorant, the pigment can only exert its coloring effect well if it is uniformly and stably dispersed in the medium. Therefore, the refinement and dispersion stability of pigments are the prerequisites for their wide ap...

Claims

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Application Information

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IPC IPC(8): C09C3/10
Inventor 房宽峻付少海
Owner JIANGNAN UNIV
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