Aluminum hydroxide products for fillers are inorganic compounds with a variety of excellent properties. The following is an introduction to them:
High whiteness
Usually in the form of white powder, Aluminum hydroxide has a high whiteness. For instance, the whiteness of some products can reach over 97%, which can meet the requirements of application scenarios with high color demands on the products.
01
Controllable particle size
The particle size distribution is uniform, and there are multiple particle sizes to choose from 2.5 microns (5000 mesh), 3 microns (4000 mesh), 5 microns (2500 mesh), etc. Customization can be made according to different application requirements.
02
Good chemical stability
Stable at room temperature, but prone to decomposition in strong acid and strong alkali solutions. When heated,Aluminum hydroxide decomposes and dehydrates to form aluminum oxide.
03
Excellent flame retardancy
During pyrolysis, no toxic or corrosive gases are produced. Instead, Aluminum hydroxide absorbs heat and releases water vapor, endowing the product with flame retardant and self-extinguishing properties.
04
Surface modifiability
After advanced surface treatment processes, Aluminum hydroxide can have good compatibility with polymer materials. When added in large quantities, it can reduce the impact on the physical and mechanical properties of the materials.
05
Packaging and Storage
It is usually packed in 25 kilogram woven bags or 1,000 kilogram large bags. When storing, it is necessary to keep it dry, avoid moisture, and prevent contact with corrosive substances such as strong acids and strong alkalis.
Technical Index
Chemical Formula : Al(OH)3
CAS NO. 21645-51-2
EINECS: 244-492-7
General Properties
|
Molecular weight |
78 |
Mohs hardness |
3 |
|
Density g/cm3 |
2.4 |
Ratio of refraction |
1.58 |
Physical and Chemical Properties
|
Model Item |
ATH-7 |
ATH-8 |
ATH-20 |
ATH-8G |
|
Al(OH)3 [%] ≥ |
99.5 |
99.5 |
99.5 |
99.5 |
|
Al2O3 [%] ≥ |
64.5 |
64.5 |
64.5 |
64.5 |
|
SiO2 [%] ≤ |
0.02 |
0.02 |
0.02 |
0.02 |
|
Fe2O3 [%] ≤ |
0.01 |
0.01 |
0.01 |
0.01 |
|
Na2O [%] ≤ |
0.30 |
0.30 |
0.30 |
0.30 |
|
L.O.I ≤ |
35 |
35 |
35 |
35 |
|
Attached water ≤ |
0.3 |
0.3 |
0.3 |
0.3 |
|
+325 mesh 325≤ |
0.01 |
0.01 |
25 |
0.01 |
|
oil absorption ≈ |
27 |
26 |
21 |
24 |
|
Mean particle diamete(D50) µ m ≈ |
7 |
9 |
20 |
8 |
|
Whiteness [R457] ≥ |
95 |
94 |
91 |
97 |
|
PH value ≈ |
9 |
9 |
9 |
9 |
Application field
Plastics, rubber and fiberglass reinforced plastics: As flame-retardant fillers, they can enhance the flame-retardant performance, leakage resistance, arc resistance and wear resistance of products.
Artificial marble slabs: Used for filling, they can improve the performance of the slabs, such as increasing hardness and gloss.
Electronics industry: Aluminum hydroxide is used for potting compounds, surface coatings of copper clad laminates, and flame-retardant paper, etc., which can enhance the insulation and flame-retardant performance of electronic components.
In the papermaking industry, Aluminum hydroxide it can be used as a colorant filler and surface coating to enhance the brightness of paper, improve printing characteristics and ink adsorption, and also reduce dust generation.
Other fields: Aluminum hydroxide can also be applied in daily cosmetics, medicine, glass industry, etc. For instance, in toothpaste, its mild frictional property can be utilized to clean and polish teeth.
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