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.

Specification of Filler fumed silica precipitated hydrophobic fumed silica

Hydrophobic Fumed Silica– Technical Specification

Product Summary
Hydrophobic fumed silica is a penalty, white powder made by dealing with hydrophilic fumed silica with special chemicals. This therapy makes the surface water-repellent. It is widely made use of as a thickening representative, anti-settling aid, and flow controller in paints, finishings, adhesives, sealers, and cosmetics.

Trick Features
– Appearance : Free-flowing white powder
– Surface Treatment : Treated with dimethyldichlorosilane or hexamethyldisilazane
– Details Surface : 50– 400 m ²/ g (BET method).
– Loss on Drying out : ≤ 1.5% at 105 ° C for 2 hours.
– Ignition Loss : 6– 30% (varies by grade).
– pH Worth : 3.5– 5.5 in 4% diffusion.
– Mass Density : 30– 80 g/L.

Performance Advantages
This silica enhances viscosity control without affecting quality. It prevents pigment settling in fluid systems. The hydrophobic nature stops moisture from compromising product efficiency. It additionally assists powders move far better and withstand clumping during storage. In silicone rubber, it enhances tear toughness and keeps flexibility.

Handling and Storage space
Store in a dry, awesome place far from wetness. Keep containers secured when not being used. Use basic dirt control procedures throughout handling. Avoid breathing dust. Wear handwear covers and eye protection if extended contact is anticipated.

Regular Applications
– Paints and commercial finishings.
– Adhesives and RTV silicones.
– Powder finishes and printer toners.
– Cosmetics like structures and powders.
– Greases and lubing oils.

Suppliers select this quality for its consistent quality and dependable performance across various solutions. Each batch fulfills strict purity and fragment dimension criteria to ensure uniform cause end products.

Applications of Filler fumed silica precipitated hydrophobic fumed silica

Applications of Hydrophobic Fumed Silica

Thickening and Anti-Settling Representative

Hydrophobic fumed silica works well in paints, coatings, and adhesives. It stops pigments and fillers from sinking to the base. This keeps the item uniform and very easy to utilize. The material also gives a smooth appearance without transforming color or clearness.

Rheology Control in Sealants

In silicone and polyurethane sealants, this silica manages flow. It aids the sealer stay in location after application. It will certainly not trickle or droop on upright surfaces. At the very same time, it stays simple to spread out during use.

Support in Rubber and Plastics

Including hydrophobic fumed silica to rubber or plastic improves toughness and wear resistance. It additionally aids keep adaptability. This makes finished items last much longer under stress and anxiety or severe conditions.

Matting Agent for Coatings

This silica develops a soft, non-glossy surface area in timber finishes, automobile paints, and commercial finishes. It spreads light equally, giving a constant matte look. The impact stays stable over time and with cleansing.

Additive in Cosmetics

In make-up like powders, foundations, and lipsticks, hydrophobic fumed silica absorbs oil and sweat. It assists items remain on the skin longer. It also offers a silky feel and lowers sparkle without obstructing pores.

Performance Booster in Industrial Fluids

Lubricating substances, oils, and cutting fluids utilize this silica to keep solid bits suspended. It prevents splitting up and makes sure also efficiency. The hydrophobic nature indicates it works well even in damp or moist atmospheres.

Key Advantage Throughout Makes Use Of

Because it pushes back water, hydrophobic fumed silica stays efficient in damp problems. It blends quickly right into lots of systems and does not glob. Its little bit dimension gives strong outcomes at low doses. This makes it a wise selection for premium formulas.

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 Filler fumed silica precipitated hydrophobic fumed silica

Frequently Asked Questions About Hydrophobic Fumed Silica

What is hydrophobic fumed silica?

Hydrophobic fumed silica is a special type of silica treated to repel water. It starts as regular fumed silica, then gets coated with chemicals like silanes. This treatment makes it resist moisture and mix better into non-water-based systems.

How does it differ from regular fumed silica?

Regular fumed silica attracts water—it’s hydrophilic. Hydrophobic fumed silica does the opposite. Because of its surface treatment, it won’t clump in wet environments. This makes it ideal for products that must stay dry or work in oily or solvent-based formulas.

Where is hydrophobic fumed silica used?

It’s common in paints, adhesives, sealants, and cosmetics. You’ll also find it in industrial coatings, printing inks, and some plastics. Its job is to thicken liquids, prevent settling, and keep powders flowing smoothly—even in humid conditions.

Why choose hydrophobic over precipitated silica?

Fumed silica has a much smaller particle size and higher surface area than precipitated silica. This gives it stronger thickening and anti-settling power at lower doses. The hydrophobic version adds moisture resistance, which precipitated types usually lack without extra treatment.

Is it safe to handle?

Yes, when used as directed. Like any fine powder, avoid breathing the dust. Use proper ventilation and wear a mask if handling large amounts. Always follow the safety instructions on the product’s safety data sheet (SDS). It’s widely approved for use in many consumer and industrial applications.