Method for preparing nano colouring matter aqueous dispersions

A water-based dispersion and nano-technology, applied in the direction of organic dyes, etc., can solve the problems of low solid content, nano-pigment dispersion properties, light resistance and weather resistance, storage stability failed to achieve the desired effect, low content of nano-pigment dyes, etc. , to achieve the effect of low surface energy, excellent tinting strength and excellent color characteristics

Inactive Publication Date: 2009-02-11
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the nano color material dye content that this method of BASF company makes is low (<8%), solid content is low (<15%), and the dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of prepolymer seeds

[0034] Add 1.43g of sodium dodecylsulfonate to 0.22g of sodium bicarbonate and dissolve it in 220g of deionized water as an aqueous phase solution; 35g of styrene-based monomer and 4.2g of diethylene After mixing basebenzene and 4.5g methyl methacrylate, add 3g disperse dye C.I. Solvent Red 146, 0.35g nucleation accelerator, stir and dissolve completely as an oil phase solution; pour the water phase solution into the oil phase solution and mix, Stir at a high speed of 1200rpm at room temperature for 20 minutes, then homogenize into a fine emulsion through a high-pressure micro-fluidic device under cooling at 0-5°C; move the fine emulsion into the reactor, pass through nitrogen to remove oxygen, heat up to 60°C, and add 0.35g Potassium persulfate (potassium persulfate is first dissolved in 110g deionized water), initiates a polymerization reaction, keeps 65-67°C for constant temperature reaction polymerization for 1.5 hours, and obta...

Embodiment 2

[0040] According to Example 1, change the oil phase 4.5g of disperse dye C.I. Solvent Yellow 189 in the miniemulsion polymerization reaction, all the other formulas and processes are the same as Example 1, and finally obtain 301.5g of yellow nanometer aqueous dispersion, wherein the solid content is 20.5%wt.

Embodiment 3

[0042] According to embodiment 1, change the oil phase 1.8g disperse dye C.I. solvent green 28 in the miniemulsion polymerization reaction, all the other formulations and technology are identical with embodiment 1. Finally, 298.5 g of green nanometer aqueous dispersion was obtained, wherein the solid content was 19.6%wt.

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PUM

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Abstract

The invention discloses a preparing method for a water dispersoid of a nanometer colouring matter which is obtained by a miniemulsion polymerization-nucleocapsid copolymerization reaction with a common dye or a common pigment. The preparation method includes the steps as follows: A, preparing the seed of a preformed polymer; B, preparing a shell copolymerization emulsion; C nucleocapsid copolymerization reaction. The average grain diameter of the water dispersoid of the colouring matter is less than 100nm and the polydispersity index is less than 0.1; the water dispersoid of the colouring matter has high granularity equality. The invention adopts the miniemulsion polymerization-nucleocapsid copolymerization to prepare, leads the dye or the pigment to be firmly combined together with a proper nanometer polymer by a chemical mode and has an excellent storage stability. As the polymer of organic silicon/acrylic acid is led in; the water dispersoid of the colouring matter has the advantages of excellent water-resistance, light-resistance, weatherability and heat resistance. The water dispersoid of the nanometer colouring matter is suitable for coloring toning agents used by color ink-jet printing ink, colorful coat of the colorful filter of a colorful display, water-based ink, water-based UV color paste, cosmetics, high-grade products, and the like.

Description

technical field [0001] The invention relates to a preparation method of a nanometer pigment aqueous dispersion. Background technique [0002] Nano pigments refer to pigment particles, dyes or pigment composites and their dispersions with a size less than 100nm. The traditional preparation of water-based color paste is to prepare water-based color paste by mechanically grinding and dispersing pigments, ultrafine pulverization or gas phase method, which is difficult to reach the nanometer level. The preparation method of nano pigment is a high energy consumption and high cost pigment preparation method; and if this water-based color paste needs to meet the high performance requirements, it must have a good dispersion system and high performance pigments, so the current dispersant And pigment cost is very high, is difficult to satisfy the demand of relevant industry. [0003] BASF was the first to use miniemulsion polymerization technology (Miniemulsion) to prepare nano pigme...

Claims

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Application Information

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IPC IPC(8): C09B69/10
Inventor 许钧强何唯平
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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