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Hydrophobic Fumed Silica Hb-620 Superior Stability Additive Ultrafine Silica for Rubber /Sealant / Coating / Varnish / Resin/ Adhesive
Basic Info
| CAS No. | 7631-86-9 |
| Formula | Sio2 |
| EINECS | 231-545-4 |
| Classification | Silicon Dioxide |
| Grade Standard | Industrial Grade |
| Quality | First Class |
| Purity | 99.8%, ≥99.8% |
| Appearance | White Powder |
| Primary Particle | 7 -40 Nm |
| pH in 4% Dispersion | 5.5~7.5 |
| Loss on Drying(2 Hour at 105ºC | 1.5 % |
| Specific Surface Area(Bet) | 200 +- 20m2/G |
| Ignition Loss | 2.0 |
| Transport Package | Bags + Pallets |
| Specification | 150 200 300 380 |
| Origin | China |
| HS Code | 281122900 |
| Production Capacity | 8000 Tons |
Product Description
Introduction:Fumed silica is the superfine micro-nano fine chemical product, which is divided into hydrophilic type and hydrophobic type in accordance with their different surface treatments.
Fumed silica includes Hydrophilic type and Hydrophobic type. And each type has many grades, no matter what grade you used before, we will provide the suitable grade of fumed silica to you.
Its appearance is white powder. Native particle size ranges from 5nm-40nm, with significant functions of thixotropy, reinforcing, thickening and filling. Therefore, it is widely used in the industries of rubber, sealant, plastic, resin, paint, printing ink, papermaking, medicine, cosmetics, food etc.
HB-620 is hydrophobic fumed silica which is produced by HL-200 after chemical post-treatment with HMDS (Hexamethyldisilazane).
Properties
* Reinforcing filler for elastomer* High hydrophobicity and stable thixotropy* Anti-settling and anti-sagging agent in coatings and printing ink* Free flow aid and anti-caking aid for powders* Rheological control for adhesives and sealants
Physical & Chemical Data | |||
Properties | Unit | Standard Value | Testing Method |
pH in 4% dispersion | 5.5~8.0 | GB/T 20020 | |
Loss on drying (2 hour at 105ºC) | % | ≤0.5 | GB/T 20020 |
Loss on ignition (2 hour at 1000° based on material dried for 2 hours at 105ºC) | % | ≤4.0 | GB/T 20020 |
Sieve residue(45μm) | mg/kg | ≤250 | GB/T 20020 |
Carbon content(based on material dried for 2 hours at 105ºC) | % | 2.5~4.0 | GB/T 20020 |
Tamped density(Based on material dried for 2 hours at 105ºC) | g/dm² | 40~60 | GB/T 20020 |
Main Specifications:
Grade | HL-200 | HL-380 | HB-139 | HB-151 | HB-615 | HB-630 |
Form | white amorphous powder | |||||
Surface area (m2/g) | 200±20 | 380±30 | 100±20 | 130±20 | 160±30 | 320±30 |
PH value | 3.9-4.5 | 3.7-4.5 | 5.5-7.5 | 3.7-4.5 | 5.5-7.5 | 5.5-8.0 |
Loss on drying(2h,105ºC) % | ≤2.0 | ≤2.5 | ≤1.5 | ≤0.7 | ≤0.5 | ≤0.5 |
Loss on ignition (2h,1000ºC) % | ≤2.0 | ≤2.5 | ≤10 | ≤2.5 | ≤4.0 | ≤4.0 |
silica content (%) | ≥99.8 | |||||
Tamped density (g/dm²) | 30-60 | 30-60 | 40-60 | 40-60 | 40-60 | 40-60 |
Surface treatment | No | No | PDMS | DDS | HMDS | HMDS |
Application | Main Functions | Recommend Grade | Suggested Usage(%) | |
Silicone rubber | HTV silicone rubber | reinforcing, transparent | HL-200, HL-300, HL-380, HB-132 | 0.5 - 3 |
Silicone rubber insulator | reinforcing,insulate | HL-150,HL-200,HB-139 | 0.5 - 3 | |
RTV silicone rubber | rheology control | HL-150,HL-200,HB Series | 0.5 - 3 | |
Powder coating | Corona discharge | free flowing, anti-caking, dispersion, charge control | HB-630,HB-151,HL-200,HL-300,HL-380 | 0.5 - 3 |
Varnish | PU, C3H4O2, epoxy-polyester resin, amino | HB-630,HB-151,HL-200,HL-300 | 0.5 - 3 | |
Liquid coating | industrial paint and marine paint | anti-sagging, anti-settling, thickening, thixotropy,leveling | HB-139,HB-151,HB-630 | 0.5 - 3 |
C3H4O2, olyester resin, UPR resin, nitro | anti-sagging, anti-settling, thickening, thixotropy | HL-200,HL-300 | 0.5 - 3 | |
Epoxy rein, vinyl polyester resin, PU | anti-sagging, anti-settling, thickening, thixotropy | HB-151,HB-139 | 0.5 - 3 | |
Sealant | PU | thixotropy,anti-sagging, water content control | HB-139,HB-151,HL-200 | 3 - 7 |
Adhesive | Epoxy | reinforcing, thixotropy, anti-sagging, thickening | HB-139,HB-151, HL-200, HL-300 | 1.5 - 3 |
Composite material | thixotropy, anti-settling, anti-sagging, thickening | HL-200, HL-300, HB-151, HB-139 | 0.5 - 3 | |
Packing:
10kg/Bag ; White craft paper bag,
For 20 GP, 1800kg with 10 pallets, 18bags/pallet ;10kg/ bag.For 40 GP, 3600kg with 20 pallets, 18bags /pallet; 10kg/ bag.For 40 HQ, 4000kg with 20 pallets, 20bags /pallet; 10kg/ bag.
FAQs
1. What is your terms of packing?
Generally, we pack our goods in carton with pallet
2. What is your tems of payment?
T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.3. What is your terms of delivery?
EXW, FOB, CFR, CIF,L/C at sight4. How about your delivery time?
Generally, it will take 21 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.5. Can you produce according to the samples? Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
6. What is your sample policy?
We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
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