The flame-retardant mechanism of aluminum hydroxide is: it decomposes at 200-300ºC, and dehydration reaction occurs after decomposition, which absorbs a large amount of heat on the surface of polymer materials, which can reduce the surface temperature of burning materials; at the same time, dehydration produces a large amount of water vapor, which dilutes combustible gas and oxygen Concentration; Its decomposition residues Al2O3 are dense oxides, which are deposited on the surface of the material to limit the generation of combustible gas,so it can play the role of heat insulation and oxygen isolation and achieve the effect of suppressing smoke; And aluminum hydroxide can absorb acid gas . Aluminum hydroxide has a moderate price and is the most widely used flame retardant filler.
Application of ATH in fireproof coating
ATH is used in fire-retardant coatings mainly for flame retardant and smoke suppression. It will not decompose into gaseous compounds and burn out under the action of fire or even continuous flame. It has high stability and can play a role in long-lasting flame resistance. , So that the fireproof coating has high-efficiency heat insulation and fireproof performance. Although aluminum hydroxide is cheap and easy to obtain, and can reduce poisonous gas and smoke, compared with organic flame retardants,, it needs to be added in a larger amount to achieve the same flame retardant effect, which often affects the coating Other physical and mechanical properties. Therefore, when it is used as a flame retardant, it is generally not used alone, but used in conjunction with other types of flame retardants. Aluminum hydroxide has high whiteness, finer particle size, and low refractive index. After surface treatment, it can be changed from hydrophilic to lipophilic to enhance its affinity with resin. It can also be used as an extender pigment for fireproof coatings, so that it can get the cheap price, high performance fire retardant coating.
Specification:
Model
|
Al(OH) 3
≥ |
AL2O
≥ |
SiO3
≤ |
Fe2O3
≤ |
Na2O
≤ |
D50
(μm) |
Oil Absorption
Ml/100g≤ |
PH |
Moisture
% |
Whiteness
% |
| H-WF-1 |
99.6 |
64.5 |
0.05 |
0.02 |
0.25 |
1.5-1.8 |
37.5 |
8.5 |
0.25 |
99.2 |
| H-WF-3 |
99.6 |
64.5 |
0.05 |
0.02 |
0.25 |
2.5-3.5 |
33.8 |
8.5 |
0.25 |
95 |
| H-WF-5 |
99.6 |
65 |
0.03 |
0.02 |
0.25 |
4.965 |
33.6 |
8.5 |
0.25 |
95 |
| H-WF-8 |
99.6 |
65 |
0.03 |
0.02 |
0.25 |
8.532 |
32 |
8 |
0.25 |
92/98 |
| H-WF-10 |
99.7 |
65 |
0.03 |
0.02 |
0.25 |
9.684 |
29 |
8 |
0.25 |
92/96/98 |
| H-WF-15 |
99.6 |
65 |
0.03 |
0.02 |
0.25 |
14.932 |
22 |
8 |
0.25 |
92/95/98 |
| H-WF-20 |
99.7 |
65 |
0.03 |
0.02 |
0.25 |
19.731 |
21 |
8 |
0.25 |
90/95/98 |
| H-WF-25 |
99.8 |
65 |
0.03 |
0.02 |
0.25 |
26.138 |
21 |
8 |
0.25 |
98 |
| H-WF-75 |
99.8 |
65 |
0.02 |
0.02 |
0.25 |
74.654 |
20 |
7.5 |
0.25 |
97 |
| H-WF-100 |
99.8 |
65 |
0.02 |
0.02 |
0.25 |
90.537 |
19 |
7.5 |
0.25 |
96 |
FAQ
Q: Are you factory?
A: Yes, we are factory.
Q: How is your quality?
A: We have top grade production equipment and precision measuring instruments and we also have engineers and technicians carry out quality control.
Q: Can you supply free samples?
A: 1kgs free sample is available, but freight charges will be at your account, The charges will be return to you or deduct from your order in the future.
Q: What about the payment?
100% T/T in advance, 30% T/T in advance, the balance 70% against the B/L copy, Irrevocable L/C at sight
Q: The MOQ is?
A: MOQ is usually 1 ton, special products can be coordinated with each other.
Q: Can I visit your factory?
A: Yes, we welcome you to visit our factory at anytime
Q: How about your delivery time?
A: Usually the shipment is within 15 days after confirming receipt of your payment, some products maybe need longer time.
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