HB-612 Properties and Functional Applications
A video to introduce HIFULL® fumed silica, today we are looking at HIFULL HB-612 hydrophobic fumed silica.
HIFULL®HB-612 (BET=150㎡/g)
HIFULL HB-612 is hydrophobic fumed silica produced by hydrophilic fumed silica with a specific surface area of 150m2/g after chemical post-treatment with HMDS/ Hexamethyldisilazane. It has properties of low thickening, high thixotropy and high reinforcing. It has great performance in RTV silicone rubber.
| Properties | Unit | Typical Value | Testing Standard |
|---|---|---|---|
| Specific surface area(BET) | m2/g | 140±20 | GB/T 20020 |
| pH in 4% dispersion | — | 5.0～8.0 | GB/T 20020 |
| Loss on drying(2 hour at 105℃) | % | ≤0.7 | GB/T 20020 |
| Loss on ignition(2 hour at 1000℃, based on material dried for 2 hours at 105℃) | % | ≤2.0 | GB/T 20020 |
| Silica content( based on ignited material) | % | ≥99.8 | GB/T 20020 |
| Tamped density(based on material dried for 2 hours at 105℃) | g/L | 40～60 | GB/T 20020 |
| Carbon content（based on material dried for 2 hours at 105℃） | % | 0.7～1.3 | GB/T 20020 |
In adhesives and sealants, HB-612 improves its mechanical properties, increases adhesion, prevents sedimentation during storage and avoids sagging and dripping issues.
In carbon fiber composite resin, HB-612 is effective in improving its strength, ductility and wear resistance;
In liquid coatings, fumed silica prevents sagging and extra paints when applying coatings, thus improves work efficiency;
In powder coatings, HB-612 prevents caking issues, and improves free-flow ability.
In printing ink, fumed silica regulates flow control and helps for good printing performance.
Related Products
Hubei Huifu Nanomaterial Co., Ltd. manufactures more than 10 grades of fumed silica, both hydrophilic and hydrophobic. We get ISO, REACH, and participate in setting ISO18473-3-2018, ISO18473-1-2015, and ISO23157. We are strong in R&D product quality and factory capacity. Feel free to contact us by email: tww@hifull.com
ABOUT HIFULL
Our main products are fumed silica SiO2, fumed titanium dioxide TiO2, and fumed alumina Al2O3. We get 20+ years of expertise and 20,000 tons of annual capacity. We supply total of 23 grades of hydrophilic & hydrophobic fumed silica. We get registration of REACH and pre-registration of K-REACH & KKDIK. We are the leading setting body of ISO18473-1:2015, ISO18473-3:2018, and ISO 23157:2021. Learn More About Hifull
Frequently Asked Question
A Manufacturer. Hubei Huifu has been researching and manufacturing fumed silica for 20+ years. We are the largest manufacturer of fumed silica with a well-developed and stable manufacturing process in China.
We get registration of REACH and pre-registration of K-REACH & KKDIK. We get certificates of ISO 9001, ISO 14001. We are the leading setting body of ISO18473-1:2015, ISO18473-3:2018 and ISO 23157:2021.
Free Sample: All grades of fumed silica sample available, Contact to Us
Pyrohydrolysi & Trichloromethylsilane
Fumed silica is synthesized by the pyrohydrolysis of silicon tetrachloride or trichloromethylsilane in the flame of hydrogen and oxygen. Our main raw material is silicon tetrachloride, and the secondary is trichloromethylsilane.
Hydrophilic Fumed Silica SiO2:
HL-150 / HL-200 / HL-300 / HL-380 / HL-150W / HL-200W
Hydrophobic Fumed Silica SiO2:
DDS Treated — HB-151/ HB-152 ;
PDMS Treated — HB-139 ;
HMDS Treated — HB-132 / HB-135 / HB-612/ HB-615 / HB-620 / HB-630.
Fumed Titanium Dioxide TiO2: NT-50
Fumed Aluminium Oxide Al2O3: Aluna-80 & Aluna-100
Price is based on the actual grade.
When the price of raw material fluctuates, we may adjust the price accordingly, please enquire before placing orders. Our email: tww@hifull.com. Cell : + 8618571019514
When fumed silica is used as filler or additives, it helps in thickening, reinforcement, transparency, free-flow, thixotropic performance, dielectric properties, anti-settling, heat insulation, and anti-sagging. For example, for powder products, HIFULL fumed silica is used as an anti-caking agent; for liquid products, HIFULL fumed silica is used as an anti-settling agent or suspending agent.
| Applications | Functions | Recommended Dosage |
| Paints & Coatings | rheology & thixotropic control,anti-sagging,anti-settling | 0.5-2% |
| UPR, Gel Coat | rheology & thixotropic control,,anti-sagging,anti-settling | 0.5-2% |
| HTV Silicone Rubber | reinforcement | 15-30% |
| RTV Silicone Rubber | thickening & reinforcing | 10-20% |
| Adhesives | rheology & thixotropic control, anti-sagging,anti-settling | 2-10% |
| Cable Gel | thickening | 5-10% |
| Gel Battery | thickening | 0.5-6% |
| Industrial Powders | anti-caking | 0.5-1% |
Quality Stabilization: we are the earliest fumed silica manufacturers with independent R&D in China, which guarantees our product stabilization.
Largest Manufacturer: Our annual output of fumed silica is about 12,000 tons.
Strong R&D Team: Besides our own R&D institute and application& technology department, we’ve to build a research center with Sichuan University and Wuhan University, both are top-tier universities in China.
Leading Authority: We have already been the influential enterprise in the silicon industry in China. Doctor Wang Yuelin, the actual controller of Hifull, is the leader of the Sino-Germany project ISO18473-3 << Fumed Silica for Silicon Rubber>> and he is granted the Outstanding Contribution Award by the committee.
Mainly T/T, L/C and D/P, actual payment terms please check with sales when placing orders.
We will arrange delivery immediately according to the manufacturing schedule and conditions. Due to shipping schedule or other factors, please check with sales when placing orders.
Still have questions?
If you cannot find an answer to your question in our FAQ, you can always contact us and we will be with you shortly.
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