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Method for preparing nano colouring matter aqueous dispersions

A water-based dispersion, nanotechnology, applied in the direction of organic dyes, etc., can solve the problems of nano-pigment dispersion properties, light and weather resistance storage stability not achieving the desired effect, low solid content, and low nano-pigment dye content. , to achieve the effect of excellent tinting strength, low surface energy and excellent color characteristics

Inactive Publication Date: 2009-07-22
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 character of product nano color material, light and weather fastness, storage stability are all not good in addition Can achieve ideal effect

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, and all the other formulas and processes are the same as in Example 1, finally obtaining 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 method for preparing a nanometer coloring material watercraft dispersoid which is prepared by the miniemulsion polymerization-core shell copolymerization of common dyes or common pigments. The specific steps are that: A. preparing prepolymer seeds; B. preparing shell polymerization emulsion; and C. carrying out core shell polymerization reaction. The average granular size of the dispersoid is less than 100nm, the polydispersity index is less than 0.1 and the granularity uniformity is high; by adopting miniemulsion polymerization-core shell copolymerization for preparation, the method firmly combines pigments or dyes with proper nanometer polymer in a chemical manner, consequently, the dispersoid has excellent storage stability; as organic silicon / acrylic acid polymer are introduced, the dispersoid has fine water resisting property, light resistance, weather resistance and heat resistance. The nanometer coloring material watercraft dispersoid of the invention is applicable for colorized ink jet marking ink, colorized monitors, colored filters, colored coatings, water color ink, watercraft UV color sizing, cosmetics and coloring toner for 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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