THE BEST Hydrophobic Fumed Silica MANUFACTURER in China
Hubei Huifu Nanomaterial Co., Ltd. is a chemical manufacturer of nanomaterials in China, Our main products are fumed silica, fumed titanium dioxide, and fumed alumina Al2O3. We get 20+ years of expertise and 12,000 tons annual capacity.
HIFULL Hydrophobic Fumed Silica
Hydrophobic fumed silica is a form of silicon dioxide (commonly known as silica) that has hydrophobic groups chemically bonded to the surface. It’s treated silica or structure-modified silica. HIFULL hydrophobic fumed silica is structure modified silica after being treated by HMDS, PDMS, DDS.
Hydrophobic FUMED SILICA
Hydrophobic fumed silica is structure-modified silica after being treated by HMDS, PDMS, DDS and other special silanes.
HMDS treatment
Hexamethyldisilazane (HMDS) is a chemical compound that is commonly used as a surface treatment for fumed silica to make it hydrophobic. The hydrophobic treatment involving HMDS enhances the dispersibility and compatibility of fumed silica in hydrophobic systems. The HMDS molecules attach to the surface of the silica particles, creating a water-repellent coating. This modification improves the performance of fumed silica in various applications.
Hydrophobic fumed silica, treated with HMDS, is widely used in industries such as paints and coatings, adhesives and sealants, cosmetics, plastics, rubber, and composites. It is added to formulations to improve properties like rheology, thixotropic behavior, stability, moisture resistance, and flow control.
HIFULL® HB-132 (BET=140㎡/g)
HIFULL®HB-612 (BET=150㎡/g)
HIFULL® HB-615 (BET=140㎡/g)
HIFULL® HB-620 (BET=200㎡/g)
HIFULL® HB-630 (BET=400㎡/g)
PDMS treatment
PDMS (Polydimethylsiloxane) hydrophobic fumed silica refers to fumed silica particles that have been surface-treated with PDMS to make them hydrophobic. When PDMS is applied to the surface of fumed silica particles, it forms a hydrophobic coating. This modification enhances the dispersibility and compatibility of fumed silica in hydrophobic systems. The PDMS molecules attach to the silica surface, creating a water-repellent layer.
HIFULL® HB-139 (BET=180㎡/g)
DDS treatment
HIFULL® HB-151(BET=150㎡/g)
HIFULL®HB-152 (BET=170㎡/g)
special silane
HIFULL®HB-701 (BET=150㎡/g)
HIFULL® HB-202N (BET=170㎡/g)
SPECIFICATION
*Registrations: HIFULL fumed silica products get registrations of REACH & Pre-registration of K-REACH &KKDIK
| Grade | Treating Agent | Specific Surface Area (nitrogen adsorption method) (m²/g) | pH value in dispersion | Loss on drying(2 hour at 105℃) | Loss on ignition (%) | Silica content (%) | Carbon content(%) | Tamped density (g/L) | Product application |
|---|---|---|---|---|---|---|---|---|---|
| HB-612 | HMDS | 140±20 | 5.0～8.0 | ≤0.7 | ≤2.0 | ≥99.8 | 0.7～1.3 | 40～60 | Roomtemperaturevulcanization (RTV)silicone rubber, ceramics, pesticides, defoamers |
| HB-615 | HMDS | 140±20 | 5.0～8.0 | ≤0.7 | ≤4.0 | ≥99.8 | 1.0～1.7 | 40～60 | Ink, electronic potting adhesive, defoamer, silicone rubber |
| HB-620 | HMDS | 170±30 | 6.0～9.0 | ≤0.7 | ≤4.0 | ≥99.8 | 1.5～2.5 | 40～60 | Silicone rubber, powder coating, defoamer, paint |
| HB-630 | HMDS | 300±30 | 6.0～9.0 | ≤0.7 | ≤5.0 | ≥99.8 | 2.5～4.0 | 40～60 | Silicone rubber, powder coating, defoamer, paint |
| HB-132 | HMDS | 140±20 | 6.0～9.0 | ≤0.7 | ≤4.0 | ≥99.8 | 2.0～4.0 | 40～60 | Silicone rubber, defoamer, adhesive, sealant |
| HB-139 | PDMS | 110±30 | 4.0～7.0 | ≤0.7 | ≤10.0 | ≥99.8 | 4.0～7.0 | 40～60 | Powder coatings, adhesives, coatings, sealants |
| HB-151 | DDS | 120±30 | ≥3.7 | ≤0.7 | ≤2.5 | ≥99.8 | 0.6～1.2 | 40～60 | Coatings, inks, adhesives, MS adhesives |
| HB-152 | DDS | 170±30 | ≥3.7 | ≤0.7 | ≤2.5 | ≥99.8 | 0.8～1.6 | 40～60 | Coatings, inks, adhesives, MS adhesives |
| HB-202N | Special Silane Treated | 170±20 | 8.0～10.0 | ≤2.0 | ≤8.0 | ≥99.8 | 1.0～2.0 | 40～60 | Coatings, anticorrosive coating products, grinding of copper products, water-based inks and water-based coatings |
| HB-701 | Special Silane Treated | 150±25 | 4.0～6.0 | ≤1.5 | ≥4.5 | ≥99.8 | 4.5～6.5 | 40～60 | Paint and coating systems, plastics and elastomers, dental composites |
Performance benefit
For systems requiring hydrophobic grades, HIFULL treated fumed silica deliver a number of performance benefits including:
Fumed silica, or pyrogenic silicon dioxide, is one kind of pure amorphous white inorganic powder that has a high specific surface area, nano-scale primary particle size, and a relatively high (among silica products) concentration of surface silanol groups. The properties of fumed silica can be chemically modified by reaction with these silanol groups.
Commercial available fumed silica can be divided into two groups: hydrophilic fumed silica and hydrophobic fumed silica. Because of the above-mentioned features, it is widely used as an important ingredient in many industries such as silicone rubber, paint, and plastics industries.
TDS/SDS/MSDS
| PRODUCT | CATEGORY | Treated | TDS | SDS/MSDS |
|---|---|---|---|---|
| HB-612 | Hydrophobic Fumed Silica | HMDS-Treated | Download | Download |
| HB-615 | Hydrophobic Fumed Silica | HMDS-Treated | Download | Download |
| HB-620 | Hydrophobic Fumed Silica | HMDS-Treated | Download | Download |
| HB-630 | Hydrophobic Fumed Silica | HMDS-Treated | Download | Download |
| HB-132 | Hydrophobic Fumed Silica | HMDS-Treated | Download | Download |
| HB-139 | Hydrophobic Fumed Silica | PDMS-Treated | Download | Download |
| HB-151 | Hydrophobic Fumed Silica | DDS-Treated | Download | Download |
| HB-152 | Hydrophobic Fumed Silica | DDS-Treated | Download | Download |
| HB-202N | Hydrophobic Fumed Silica | Special Silane Treated | Download | |
| HB-701 | Hydrophobic Fumed Silica | Special Silane Treated | Download |
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: hifull@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.