Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

(CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215)

Specification of CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215

CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215 is a high-performance amorphous silica product engineered for applications calling for boosted hydrophobicity, rheology control, and reinforcement. Created via fire hydrolysis of silicon tetrachloride, this fumed silica undergoes surface area therapy to attain its hydrophobic homes, making it immune to moisture absorption and ideal for use in polar systems.

** Physical Properties **: The material appears as a penalty, white, cosy powder with a bulk thickness of roughly 40– 60 g/L. Its key particle dimension varies between 5– 50 nm, forming accumulations with a high certain surface of 150– 300 m ²/ g. This framework contributes to its outstanding thickening, thixotropic, and anti-settling capacities.

** Chemical Qualities **: Silicon Dioxide (SiO ₂) web content exceeds 99.8%, making certain high pureness. The hydrophobic nature is achieved via surface area modification with organosilanes, resulting in a moisture content of ≤ 1.5% (loss on drying at 105 ° C )and a pH of 5.5– 7.5 in a 4% aqueous dispersion. Its reduced volatile web content and thermal security approximately 600 ° C make it suitable for high-temperature processes.

** Secret Applications **: Fusil215 is extensively utilized in finishes, adhesives, sealants, and elastomers to boost thickness control, sag resistance, and mechanical strength. In plastics and compounds, it enhances dispersion, reduces shrinkage, and strengthens matrix stability. The hydrophobic residential or commercial properties make it optimal for silicone rubber, cosmetics, and inks, where water resistance and smooth appearance are essential. It also serves as a circulation help in powders and a matting representative in films.

** Handling & Safety and security **: While safe and classified as non-hazardous, breathing of dirt ought to be avoided. Usage safety tools (handwear covers, masks) throughout handling. Store in a completely dry, great environment, sealed securely to avoid contamination. Follow regional policies for disposal.

Fusil215 integrates versatility with performance, offering premium compatibility with natural polymers, UV resistance, and long-lasting stability. Its customized hydrophobicity ensures optimal efficiency in moisture-sensitive settings, making it a favored choice throughout sectors.

(CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215)

Applications of CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215

CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215 is a high-performance additive widely used throughout sectors due to its distinct residential properties. Created through flame hydrolysis, this fumed silica is treated to accomplish hydrophobicity, making it water-repellent and extremely compatible with natural systems. Its ultra-fine fragments, large surface, and reduced thickness add to outstanding performance in varied applications.

In coatings and paints, Fusil215 functions as a rheology modifier, boosting thickness and thixotropy to stop sagging or leaking on vertical surfaces. It improves toughness, climate resistance, and gloss control, making it suitable for vehicle, marine, and architectural finishes. The hydrophobic nature makes certain stability in moist environments, reducing water ingress and deterioration.

Adhesives and sealants take advantage of Fusil215’s thickening and enhancing residential or commercial properties. It enhances bond strength, reduces filler settling, and offers sag resistance in high-viscosity formulations. Its wetness resistance is critical in building sealers and vehicle adhesives, ensuring lasting efficiency under harsh problems.

In silicone rubber and elastomers, Fusil215 functions as a reinforcing filler, boosting tensile stamina, tear resistance, and thermal stability. Its hydrophobicity prevents moisture absorption, keeping electric insulation residential properties in wires and digital encapsulants.

Personal treatment items, such as cosmetics and sunscreens, leverage Fusil215 for its smooth structure and matte coating. It controls oil absorption, lowers sparkle, and boosts item spreadability. In pharmaceuticals, it acts as a circulation aid for powders, protecting against caking and making sure regular tablet compaction.

Fusil215 is additionally used in inks, lubricating substances, and composite materials. It adjusts thickness in printing inks, prevents sedimentation in greases, and strengthens plastics for light-weight, high-strength parts. Its chemical inertness and thermal stability make it ideal for high-temperature applications.

Generally, Fusil215’s versatility comes from its capacity to boost item performance via enhanced rheology, support, and dampness resistance. Its free-flowing nature guarantees simple handling, making it a recommended option for sectors looking for trusted, high-grade additives.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215

1. **What is Silicon Dioxide Hydrophobic Fumed Silica Fusil215?**
Silicon Dioxide Hydrophobic Fumed Silica Fusil215 (CAS 7631-86-9) is a high-purity, synthetic amorphous silica produced via flame hydrolysis. It is chemically treated to become hydrophobic, repelling water while maintaining high surface area and low bulk density. Its primary function is as a rheology modifier, thickening agent, or anti-caking additive in coatings, adhesives, plastics, and cosmetics, enhancing stability and performance in moisture-sensitive environments.

2. **How does Fusil215 differ from hydrophilic fumed silica?**
Fusil215 is surface-modified to repel water, unlike hydrophilic silica, which absorbs moisture. This hydrophobicity prevents clumping in humid conditions, improves dispersion in non-polar systems, and ensures consistent performance in applications requiring water resistance. It retains the reinforcing and thickening properties of fumed silica but is better suited for hydrophobic matrices like silicone rubbers or oil-based coatings.

3. **What industries commonly use Fusil215?**
It is widely used in paints and coatings (for anti-sagging and UV resistance), adhesives (to control viscosity), pharmaceuticals (as a flow aid in tablets), cosmetics (for texture enhancement), and silicone rubber (as a reinforcing filler). Its versatility also extends to inks, greases, and food-grade applications where moisture control is critical.

4. **Is Fusil215 safe to handle?**
While Fusil215 is non-toxic, inhalation of fine particles may cause respiratory irritation. Use protective equipment (gloves, masks, goggles) during handling. Avoid dust formation and ensure adequate ventilation. It is chemically inert under normal conditions but should be stored in a dry, sealed container away from incompatible materials like strong acids or bases.

5. **How does Fusil215 improve product performance?**
Its nano-scale particles create a network that thickens mixtures, prevents settling, and enhances mechanical strength. In coatings, it improves anti-sagging and leveling; in plastics, it boosts durability. The hydrophobic nature ensures stability in humid environments, extending shelf life and maintaining consistency in formulations exposed to moisture. Optimal dosage depends on the application but typically ranges from 0.5% to 5% by weight.

(CAS NO 7631-86-9 Silicon Dioxide Hydrophobic Fumed Silica Fusil215)