Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of modification method of aluminum hydroxide

A kind of aluminum hydroxide, modification technology, applied in chemical instruments and methods, dyeing organosilicon compound treatment, inorganic pigment treatment and other directions, can solve the problems of increasing the amount of modified liquid used, low coating rate, easy to be polluted and so on , to avoid the loss of the modified liquid, the operation process is simple, and the product purity is improved.

Active Publication Date: 2018-03-30
ZIBO LINJIA ALUMINUM IND TECH CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, dry modification and wet modification are generally used for surface modification. The operation process of dry modification is simple, but the modification coating is uneven, the coating rate is low, and a large amount of dust will be generated during the production process. , resulting in pollution of the workplace and the formation of hidden dangers of occupational disease risks
In addition, during the dry modification process, the aluminum hydroxide micropowder is exposed to the open environment for a long time, and secondary packaging is required, which is very easy to be polluted
[0004] The problem of dry modification is solved by wet modification, and the modification effect is good. Currently, silane coupling agents are commonly used for modification. Since ordinary silane coupling agents are insoluble in water, they are used in wet modification. It is necessary to add an emulsifier for emulsification. After emulsification, the silane coupling agent is relatively uniformly dispersed in water to enhance the modification effect. However, in the wet modification, the modified solution of the silane coupling agent is hydrolytically unstable and needs to be consumed A considerable amount, thus increasing the amount of modifying liquid used, also makes the residual solids of modifying agent and emulsifier excessive in the aluminum hydroxide micropowder product, affecting the purity of the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A modification method of aluminum hydroxide is:

[0027] (1) Preparation of modified solution: Mix N-2-aminoethyl-3-aminopropyltrimethoxysilane, methoxyisopropanol, acetic acid and water by weight percentage: N-2-aminoethyl - 40% of 3-aminopropyltrimethoxysilane, 50% of methoxyisopropanol, 1% of acetic acid, and 9% of water, stirred for 15 hours at a temperature of 50°C and a speed of 3000rpm for hydrolysis and polycondensation, and then vacuum Dehydration to obtain a modified liquid aminopropyltrimethoxysilane oligomer;

[0028] (2) Modification of aluminum hydroxide: Add the aluminum hydroxide filter cake with a water content of 46% obtained after the hydraulic filter cleaning of the aluminum hydroxide micropowder and sodium aluminate into the beating tank to prepare the aluminum hydroxide slurry and then pump into the modification tank, add the aminopropyltrimethoxysilane oligomer modification solution prepared in step (1), and modify the aluminum hydroxide micropow...

Embodiment 2

[0031] A modification method of aluminum hydroxide is:

[0032] (1) Preparation of modified solution: Mix N-2-aminoethyl-3-aminopropyltrimethoxysilane, methoxyisopropanol, stannous octoate and water by weight percentage: N-2-ammonia Ethyl-3-aminopropyltrimethoxysilane 41%, methoxyisopropanol 42%, stannous octoate 1%, water 16%, stirred for 13 hours at a temperature of 55°C and a speed of 2500rpm for hydrolysis polycondensation, and then vacuum dehydration to obtain a modified liquid aminopropyltrimethoxysilane oligomer;

[0033] (2) Modification of aluminum hydroxide: Add the aluminum hydroxide filter cake with a water content of 45% obtained after hydraulic filtration and cleaning of aluminum hydroxide fine powder and sodium aluminate into the beating tank, and add the ammonia prepared in step (1) Propyltrimethoxysilane oligomer modified liquid, modified aluminum hydroxide micropowder, the addition of aminopropyltrimethoxysilane oligomer is 0.9% of the weight of aluminum hyd...

Embodiment 3

[0036] A modification method of aluminum hydroxide is:

[0037] (1) Preparation of modified solution: Mix N-2-aminoethyl-3-aminopropyltrimethoxysilane, methoxyisopropanol, dibutyltin dilaurate and water by weight percentage: N-2 -Aminoethyl-3-aminopropyltrimethoxysilane 50%, methoxyisopropanol 40%, dibutyltin dilaurate 2%, water 8%, at a temperature of 60°C and a speed of 2000rpm Stir for 10 hours to carry out hydrolysis and polycondensation, and then vacuum dehydration to obtain a modified liquid aminopropyltrimethoxysilane oligomer;

[0038] (2) Modification of aluminum hydroxide: Add the aluminum hydroxide filter cake with a moisture content of 55% obtained after hydraulic filtration of the aluminum hydroxide micropowder slurry into the beating tank, and add the aminopropane prepared in step (1) during the beating process Aminopropyltrimethoxysilane oligomer modified liquid, modified aluminum hydroxide powder, the addition of aminopropyltrimethoxysilane oligomer is 1.5% of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
activation indexaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for modifying aluminum hydroxide. The aluminum hydroxide filter cake obtained after mixing aluminum hydroxide powder and sodium aluminate through hydraulic filtration and cleaning is added into a beating tank to prepare aluminum hydroxide slurry, and pumped into the modification tank. In the method, adding aminopropyltrimethoxysilane oligomer to modify aluminum hydroxide, drying the modified aluminum hydroxide slurry to obtain aluminum hydroxide fine powder. Compared with the prior art, it has the characteristics of good modification effect, less modification liquid usage and high safety.

Description

technical field [0001] The invention relates to the technical field of powder surface modification, in particular to a method for modifying aluminum hydroxide. Background technique [0002] Aluminum hydroxide flame retardant has three functions of flame retardancy, smoke elimination and filling, and can be widely used in flame retardancy and filling of polymer materials. Due to the high polarity of aluminum hydroxide and the influence of hydrogen bonds, it is very easy to agglomerate between the particles; and the compatibility between aluminum hydroxide and organic polymers is poor, if directly mixed to prepare flame-retardant composite materials, it will The dispersion and distribution in the composite material is uneven, and the larger particle size will also cause the stress concentration of the composite material, which will become the weak link of the performance of the composite material. If the filling amount is large, it will easily affect the processing performance...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/12C09C3/06
Inventor 吕林
Owner ZIBO LINJIA ALUMINUM IND TECH CO LTD