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Hydrophobic fumed silica which is produced by hydrophilic fumed silica after chemical post-treatment with Polydimethylsiloxane/ PDMS. It’s widely used in silicone rubber, coatings, inks, adhesives, sealants, lubricants, cable gel, vinyl ester resin and powder coating industries. It has good thickening & thixotropy properties, and stability in epoxy resin system products, high loading enables it great reinforce performance for polymers.
Cas No. :
67762-90-7Density :
2g/cm3 (20℃)Melting point :
N/A, decomposePlace of Origin :
ChinaApperance :
White powderPurity :
99.8%minBasic information
The original particle size of this product is precisely controlled within 20-40 nanometers. Its high specific surface area provides excellent dispersibility and reinforcing properties. The purity exceeds 99.8%, with extremely low impurity content, ensuring the stability of application. The unique hydrophobic modification endows it with outstanding water resistance, effectively improving the fluidity and thixotropy of the system, and is suitable for various scenarios such as coatings, adhesives, and composite materials.
Specification
|
Test Item |
Unit |
Typical Value |
|
Specific Surface Area (BET) |
m²/g |
110±30 |
|
pH (4% Suspension, Water:Ethanol = 1:1) |
- |
4.0~7.0 |
|
Loss on Drying*1 (105℃, 2h) |
% |
≤ 0.7 |
|
Loss on Ignition*2 |
% |
≤ 10.0 |
|
Tap Density*2 |
g/L |
45~70 |
|
Carbon Content |
% |
4.0~7.0 |
|
Silica Content (Based on Ignited Product) |
% |
≥ 99.8 |
Application
1. Hydrophobic gas-phase silica can be dispersed in silicone rubber and sealants, preventing filler sedimentation, enhancing strength and aging resistance, and is suitable for building and automotive sealing applications.
2. It can regulate the thixotropic properties of coatings and inks, prevent construction run-off and ensure smooth application, and also enhance the water resistance of the coating, suitable for furniture paints, etc.
3. It can adsorb the moisture in the electrolyte, prevent leakage of the electrolyte, reduce the side reactions of the electrodes, and enhance the lifespan and safety of the battery.
4. In makeup and skin care products, it can thicken and stabilize the product, reduce stickiness and enhance the skin's sensation, and is compatible with active ingredients.
Packing
Certificates
The products have been approved by FDA,REACH,ROSH,ISO and other certification, in line with national standards.
Factor
y
FAQ
Q: Are you trading company or manufacturer?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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