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Method for preparing high-concentration nano aluminum hydroxide aqueous dispersion and prepared product

A nano-aluminum hydroxide and water-based dispersion technology, applied in chemical instruments and methods, dyed organic silicon compound treatment, dyed low-molecular organic compound treatment, etc., can solve the problems of low efficiency and limit the application of nano-aluminum hydroxide, Achieve the effects of fast ink absorption, bright colors and guaranteed dispersion

Active Publication Date: 2011-04-13
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although nano-aluminum hydroxide has good dispersibility when used in ink-absorbing media, the concentration of the nano-aluminum hydroxide dispersion liquid that can be prepared at present is generally between 15wt.%~25wt.%. The efficiency of nano-aluminum hydroxide is not high when used as an ink-absorbing material, and it also limits the application of nano-aluminum hydroxide in other occasions

Method used

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  • Method for preparing high-concentration nano aluminum hydroxide aqueous dispersion and prepared product
  • Method for preparing high-concentration nano aluminum hydroxide aqueous dispersion and prepared product
  • Method for preparing high-concentration nano aluminum hydroxide aqueous dispersion and prepared product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A beaker (500 mL) containing 200 g of deionized water was placed under a toothed stirring paddle with a diameter of 5 cm, and the speed of the stirrer was 200 rpm. During stirring, 3.3 g of nitric acid (30 wt.%) was added and dispersed for 5 min.

[0055] The stirring speed was raised to 1000 rpm, and 111 g of nanometer aluminum hydroxide was gradually added into the acid-containing water with a spoon. After dispersing at a speed of 1000rpm for 20min, then gradually increase the speed to 2000rpm, and disperse at this speed for 30min.

[0056] Add 2.2g of glycidoxypropyltrimethoxysilane, adjust the speed to 3000rpm, and disperse for another 120min.

[0057] The concentration of the nano aluminum hydroxide aqueous dispersion is 35wt.%.

[0058] Test the viscosity of this concentration nano-aluminum hydroxide aqueous dispersion liquid, obtain the relationship figure of dispersion liquid concentration and viscosity together with the viscosity of other concentration disper...

Embodiment 2

[0062] Substantially prepare nano-aluminum hydroxide aqueous dispersion liquid by the same method described in embodiment 1, but be different from embodiment 1: the amount of adding nitric acid (30wt.%) is 4.1g, and the amount of nano-aluminum hydroxide is 138g, The amount of glycidoxypropyltrimethoxysilane was 2.8 g.

[0063] The concentration of the nano aluminum hydroxide aqueous dispersion is 40wt.%.

[0064] Also test the viscosity of the nano-aluminum hydroxide aqueous dispersion, and investigate the application effect.

Embodiment 3

[0066] Substantially prepare nano-aluminum hydroxide aqueous dispersion liquid by the same method described in embodiment 1, but be different from embodiment 1: the amount of adding nitric acid (30wt.%) is 5.1g, and the amount of nano-aluminum hydroxide is 171g, The amount of glycidoxypropyltrimethoxysilane was 3.4 g.

[0067] The concentration of the nano aluminum hydroxide aqueous dispersion is 45wt.%.

[0068] Also test the viscosity of the nano-aluminum hydroxide aqueous dispersion, and investigate the application effect.

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Abstract

The invention discloses a method for preparing high-concentration nano aluminum hydroxide aqueous dispersion, which comprises the following steps of: (1) adding monoacid serving as a dispersing agent into deionized water, and regulating the pH value to be 2 to 6.5; (2) adding nano aluminum hydroxide powder with stirring for dispersing; and (3) adding a surface modifier to modify the surface of the nano aluminum hydroxide with stirring, and finally preparing the high-concentration nano aluminum hydroxide aqueous dispersion with the concentration of between 30 to 66 weight percent, wherein the step (2) and the step (3) are simultaneously or alternately performed. The prepared nano aluminum hydroxide aqueous dispersion has the characteristics of high concentration, low viscosity, high stability and the like, and is particularly suitable to be applied to blotting materials.

Description

technical field [0001] The present invention relates to a method for preparing an aqueous dispersion of powder materials and the prepared aqueous dispersion, more specifically, the present invention relates to a high-concentration nano-aluminum hydroxide aqueous solution used for ink-absorbing materials of inkjet printing media The preparation method of the dispersion liquid and the prepared high-concentration nanometer aluminum hydroxide aqueous dispersion liquid. Background technique [0002] The aluminum series products used for color inkjet printing photo paper inkjet media mainly include nano-alumina and nano-aluminum hydroxide. At present, nano-alumina products are mostly used, among which Degussa, Cabot and other companies are the main ones, and nano-alumina hydroxide used for ink-absorbing media is a relatively late start. As a new type of ink-absorbing medium material, only a handful of companies at home and abroad can produce nano-aluminum hydroxide used as an ink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/40C09C3/12C09C3/06C09C3/08C09D1/00
Inventor 李生祥潘晓兵王芳
Owner GUANGZHOU HUMAN CHEM
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