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HS Code |
419749 |
| Product Name | HIFULL HB-135 Hydrophobic Fumed Silica |
| Bet Surface Area | 330 m²/g |
| Appearance | White, amorphous powder |
| Ph Value | 3.5-5.5 (4% dispersion in water) |
| Loss On Drying | <0.5% (at 105°C, 2 hours) |
| Sio2 Content | ≥99.8% |
| Carbon Content | 1.0-1.7% |
| Tapped Density | 40-60 g/L |
| Primary Particle Size | 7-16 nm |
| Surface Treatment | Hexamethyldisilazane (HMDS) |
| Moisture Content | <0.5% |
| Refractive Index | 1.46 |
| Ignition Loss | <1.5% (at 1000°C, 2 hours) |
| Cas Number | 68909-20-6 |
| Hydrophobicity | High |
As an accredited HIFULL HB-135 Hydrophobic Fumed Silica (BET=330㎡/g) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HIFULL HB-135 Hydrophobic Fumed Silica is packaged in 10kg multi-ply kraft paper bags with inner polyethylene liner for moisture protection. |
| Container Loading (20′ FCL) | 20′ FCL can load 2,560kg of HIFULL HB-135 Hydrophobic Fumed Silica, packed in 10kg bags, 256 bags total. |
| Shipping | HIFULL HB-135 Hydrophobic Fumed Silica (BET=330㎡/g) is shipped in sealed, moisture-proof, 10kg or 20kg kraft paper bags with polyethylene lining. Each package is clearly labeled and securely palletized to prevent damage during transit. Store and transport in a dry, well-ventilated environment away from incompatible substances. |
| Storage | HIFULL HB-135 Hydrophobic Fumed Silica (BET=330㎡/g) should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area. Protect from moisture and direct sunlight. Avoid sources of ignition and strong oxidizing agents. Handle in accordance with good industrial hygiene practices, using dust control measures to prevent inhalation or environmental release. |
| Shelf Life | HIFULL HB-135 Hydrophobic Fumed Silica has a shelf life of 2 years when stored unopened in a cool, dry place. |
Applications of HIFULL HB-135 Hydrophobic Fumed Silica (BET=330㎡/g) in Industrial ManufacturingHIFULL HB-135 hydrophobic fumed silica delivers critical surface modification and rheology control across advanced manufacturing sectors. Our production technology ensures consistent surface treatment, tailored for industries requiring high BET area and moisture resistance. Key applications span coatings, sealants, silicone rubber, adhesives, cable compounds, and powder processing. Below, we detail actual downstream sectors and usage protocols. 1. Solvent-Based Industrial CoatingsManufacturers use hydrophobic fumed silica to achieve anti-settling, improved scratch resistance, and rheological stability in high-performance solvent-based coatings. The additive supports easier handling during paint manufacturing and ensures consistent application on automotive, marine, and tooling surfaces. Process integration emphasizes fine powder dispersion, demanding high-shear mixing to prevent agglomeration. Industry compliance standards
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2. RTV and HTV Silicone Rubber CompoundsHigh specific surface area hydrophobic fumed silica acts as a crucial reinforcing filler in room-temperature vulcanizing (RTV) and high-temperature vulcanizing (HTV) silicone systems. It increases tensile strength, tear resistance, and controls flow under pressure in extrusion and molding applications. Our grade maintains low moisture pick-up for long pot life and reliable cure dynamics. Industry compliance standards
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3. Anaerobic and Epoxy AdhesivesSurface-modified fumed silica enables critical thixotropic behavior in high-performance anaerobic and epoxy adhesives. This allows precise vertical and overhead application without sagging, maintaining bond line integrity before curing. Formulators select hydrophobic types to retain storage stability under variable humidity. Industry compliance standards
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4. Cable Compound and Gel ProcessingTelecommunications and power cable facilities use hydrophobic fumed silica as a thickener for compound and gel formulations. It imparts water-resistant, stable consistency essential for blocking and insulation gels in optical fiber and electric cable manufacture. High BET values support reliable syneresis control during high-volume extrusion and filling. Industry compliance standards
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5. Pharmaceutical Powder Processing (Non-API Use)Pharmaceutical powder processors employ our hydrophobic fumed silica as a glidant and moisture barrier for direct compression excipient blends, including dietary supplement tablets and vitamin premixes. The material prevents caking and ensures consistent flow in high-speed tablet presses, especially under high humidity storage and handling. Industry compliance standards
Typical usage ratio
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6. Industrial Powder Handling and Flow AdditivesProducers in food, cosmetics, and chemical industries utilize hydrophobic fumed silica as a free-flow and anti-caking agent for hygroscopic powders. The treated surface offers low moisture adsorption, extending shelf life and enhancing pipeline transfer in pneumatic conveying or bulk bag filling operations. This function is vital for high-throughput packaging lines and automated filling stations. Industry compliance standards
Typical usage ratio
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Competitive HIFULL HB-135 Hydrophobic Fumed Silica (BET=330㎡/g) prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615651039172 or mail to sales9@bouling-chem.com.
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Tel: +8615651039172
Email: sales9@bouling-chem.com
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Working at the production end of silica manufacture gives a clear perspective on what really matters in a material like HIFULL HB-135. Our team brings years of experience tuning each batch to deliver consistent, reliable results. The HB-135 model comes straight from our line, engineered with a BET surface area of 330 square meters per gram—this high surface area shapes its performance profile in concrete ways.
In our daily operations, controlling the silicone feed rates, reaction temperature, and hydrophobizing agent ensures HB-135 develops the true hydrophobicity that customers seek. There’s nothing abstract about handling hundreds of tons per year and knowing which silica gets chosen for which demanding application. For us, HB-135 isn’t just a laboratory code. This hydrophobic grade supports some of the most challenging formulations in paints, sealants, adhesives, coatings, and elastomers.
Hydrophobic fumed silica shows a distinct difference from untreated fumed silica the moment you handle it. Standard fumed silica will absorb atmospheric moisture, clumping within minutes on a humid day. HB-135, on the other hand, resists this bind with water. Thanks to surface modification—reacted directly into the silica structure during production—hydrophobicity is not just a treatment, it’s inherent to the product.
This trait carries real advantages. HB-135 will disperse well in non-polar liquids such as silicone oils or resins, forming stable rheology without the risk of water-induced separation. In our own application trials, this means longer shelf lives and less trouble during high-temperature storage. Chemists relying on HB-135 for thickening or anti-settling effects see minimal shift over time, even when containers sit for weeks or roll through warm logistics routes.
Surface area matters. With 330 square meters per gram, HB-135 brings massive interactive capacity per weight. More surface area amplifies the fumed silica’s thixotropic impact, improving suspension in complex fluids. Our batch records confirm how this translates straight into performance: A lower addition level reaches the desired thickening or anti-sag structure, meaning greater efficiency in use. Manufacturers working with expensive resins appreciate that HB-135 enables robust rheology with minimal addition—saving both cost and formulation space.
Through the years, our lab teams have tracked batch-to-batch variability. It's not enough to simply reach a target number once; consistency in surface area profile ensures the final product acts the same each time. This keeps batch troubleshooting at a minimum. Paint, sealant, and adhesive makers report that even minor fluctuations in BET surface area can show up as unpredictable flow or sagging. Our investments in German precision testing and on-line process controls keep HB-135’s surface area locked in, so downstream users see stable results.
Hydrophobic fumed silica like HB-135 and hydrophilic grades serve different masters. Hydrophilic silica works best where polar interactions matter—aqueous systems, waterborne paints, toothpaste, or certain medical gels. But add hydrophilic silica to a hydrophobic resin or silicone and stability issues crop up fast. You’ll see caking, lump formation, or cloudy gels. Our customers in silicone elastomer and solventborne paint industries noticed these effects early, switching over to hydrophobic types for their backbone formulations.
On the production line, hydrophobic grades like HB-135 make life easier. Conveying and storage show less powder agglomeration. Dosing systems operate with fewer blockages. Technicians spend less time knocking clumps out of hoppers or troubleshooting segregated blends. In our facilities, standard hydrophilic grades draw in moisture and require extra environmental handling. HB-135 stays dry, free flowing, and stable from silo to packing line.
The daily reality of manufacturing shows which grades fit which job. HB-135 delivers value where hydrophobic thickening, gelling, and reinforcement are crucial. Silicone rubber is a stronghold—we work with manufacturers of sealants, potting compounds, and RTV forms who rely on the product’s robust network-building effect. With the high surface area of HB-135, rheology developers hit target profiles at low dosages, reducing haze and clarity issues common with higher-load fillers.
For coatings producers, HB-135 holds pigments and fillers in uniform suspension, no matter how long the can sits. We hear from users that grind and let-down viscosity are both tuned rapidly with careful dosing, shedding time from the production cycle. Chemists blend it into alkyds, acrylics, polyesters, and even more exotic binders. HB-135 gives consistent thickening, anti-settle, and anti-sag benefits without making the final product sticky or stringy.
In adhesives, HB-135 toughens up challenging formulations—especially solventborne, hot melt, or epoxy types. Because it resists wetting by water, the filler doesn’t form microbubbles or interfere with moisture-cured component systems. At our facility, we test each batch against standard markers not just for dispersion but also for the tactile qualities that our biggest customers rely on. A sticky, resiny adhesive gets stronger and more consistent with well-dispersed HB-135; no batch ever ships out without meeting these markers.
HB-135 also supports the personal care and cosmetics sector. In non-aqueous systems—lipsticks, foundations, water-free creams—the hydrophobic grade improves spreadability and acts as an anti-caking agent. Cosmetic labs appreciate HB-135’s purity and non-reactive surface; the processes we use for silanization leave virtually no free hydrophobizing agent, only covalently bound modifiers that never migrate into the end product.
At the factory, nothing replaces the experience of seasoned operators overseeing reactor runs, filter changes, and surface treatments. Our hydrophobization process operates under tightly controlled temperature and humidity, using only high-grade silanizing agents. Each batch of HB-135 undergoes surface area checks, hydrophobicity index testing, and bulk density measurement. We also evaluate dispersibility in both standard test media and real-world customer binders.
Many market players source silica from third parties and blend across grades. From the perspective of the manufacturer, this leads to unpredictability. We’ve built our facility around producing fumed silica from the ground up, using a continuous flame hydrolysis of chlorosilanes. By holding each production point in-house, we maintain full traceability—from input chemical purity to finished bag.
Third-party suppliers and traders often focus on price points. We put stability, pumpability, mixing, and shelf life at the core of our value promise. Users investing in HB-135 do so because they’ve seen how hydrophobicity and surface area remain stable year to year—and our customer-facing tech team troubleshoots directly in the field, integrating feedback back into our manufacturing process.
Experience proves the importance of picking the right silica grade. Lower-surface-area hydrophobic silicas exist, but these build structure more slowly and demand higher loadings to achieve the same effect. This can lead to haze, sedimentation, or processing challenges. HB-135’s 330㎡/g surface area falls into a versatile sweet spot, offering robust thickening without sacrificing clarity or workability.
Our hydrophobic fumed silica portfolio stretches from specialty ultra-high area grades to economy types below 200㎡/g surface area. Through years of field trials and development, we’ve seen how HB-135 consistently delivers broader compatibility—whether in aromatic, aliphatic, or silicone systems. Paint chemists see less yellowing or degradation during accelerated aging, a difference tied directly to surface purity and reliable manufacturing.
Competitor hydrophobic silicas sometimes cut corners, leaving free silane or incomplete surface coverage. These products might pass basic hydrophobicity checks but fail under thermal or chemical stress—resulting in loss of gelling or flocculation. Every year, customers come to us after failed trials with other brands, quick to notice the difference in real operating conditions.
Running fumed silica production at scale means thinking about more than purity and price. In our plant, dust handling stands as a top safety focus. HB-135’s hydrophobic surface reduces fine powder accumulation on equipment, limiting explosion risks and improving housekeeping. We operate enclosed conveying and packing, with local dust extraction at loading points. Operators wear respirators during open handling, and our plant invests in industrial hygiene audits.
We also look at downstream waste handling. HB-135 itself remains an inert filler, but any hydrophobic surface must not break down under exposure to sunlight, oxygen, or heat. Our quality team confirms via lab simulations that once embedded within a cured resin matrix, HB-135 will not leach, react, or degrade, minimizing risk across the life span of coatings, adhesives, or elastomers containing our silica.
Unlike some fillers, hydrophobic fumed silica does not draw hazardous chemicals into the finished product nor release volatile byproducts. Long study and real-world monitoring show HB-135 brings low environmental risk when handled using proper dust controls and workplace protections.
The shift towards sustainable chemicals production lands directly with us. Our facility invests in closed-loop recovery of reaction off-gases, solvent recapture, and energy-efficient incineration to keep emissions down. Feedstock optimization reduces waste chlorosilanes and trims overall resource use. By constantly revisiting our energy input per kilogram produced, we work towards a smaller carbon footprint over time.
Customers increasingly ask how their fumed silica gets made, and they deserve straight answers. We publish annual audits of energy and water use, and our technical managers frequently give plant tours to major buyers. Transparency and traceability have opened doors to partnerships with leading green coatings and next-generation adhesives developers.
HB-135 evolves as user needs evolve. Our technical service teams live in the field, working hand-in-hand with customers to tune dispersing procedures, integrate powder handling with their process flow, and shape future product modifications. This is not theory—it happens daily, as we respond with batch tweaks, data sharing, and honest feedback about what works best in a given application.
We believe the direct line from factory to formulator leads to the fastest improvements. If someone finds a process bottleneck, or if a new resin type demands a different silica profile, our R&D lab prototypes modifications and pushes them through production on short notice. The loop between operator, researcher, and customer drives HB-135 to stay relevant, efficient, and productive year in, year out.
Decades of experience show that smart material selection starts at the factory level. Hydrophobic fumed silica HB-135 stands as a tool shaped by hands-on skill at each production stage. From blending batch-reacted, surface-modified powder in world-scale reactors to packing out for worldwide shipping, each step draws on continuous improvement and a drive for real-world consistency.
Consumer demands for safer, longer-lasting, higher-performance products trace back upstream to choices made by the actual manufacturer. HB-135’s profile—a true hydrophobic surface, high surface area, and consistent bulk density—comes from choices made every day on our production floor. Paint, adhesive, resin, and elastomer businesses worldwide have built proven, stable brands atop this backbone material.
We see challenges ahead—faster curing chemistries, greener systems, more demanding mechanical standards—but also opportunity. Real progress means continuous learning, fast feedback cycles, and open-door collaboration. That remains how we approach product like HB-135, and why this hydrophobic fumed silica continues to anchor the most demanding formulas across industries.
