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 China fumed silica R202 countertype amorphous powder hydrophobic fumed silica HB 139

China Fumed Silica R202– Hydrophobic Amorphous Powder

Item Introduction

China Fumed Silica R202 is a high-grade hydrophobic fumed silica. It matches the performance of global qualities like HB-139. This great white powder is made via flame hydrolysis. Surface area treatment with dimethyldichlorosilane offers it solid water-repellent residential properties.

Key Features

This product has an extremely low moisture absorption price. It flows freely and blends well right into numerous systems. Its specific area ranges from 100 to 130 m TWO/ g. The material remains steady under regular storage conditions. It does not glob conveniently and maintains its framework gradually.

Regular Applications

R202 hydrophobic fumed silica jobs well in sealers, adhesives, and finishes. It avoids drooping and working out in thick liquids. In paints, it assists control gloss and improves scrape resistance. The powder likewise acts as a thickening agent in cosmetics and commercial oils. Since it pushes back water, it adds resilience to items exposed to moisture or rainfall.

Technical Information

– Appearance: Free-flowing white powder
– wager surface: 100– 130 m TWO/ g.
– Loss on drying (105 ° C, 2 humans resources): ≤ 1.5%.
– pH worth (4% diffusion in water): 3.6– 4.8.
– Tamped thickness: 40– 70 g/L.
– Hydrophobicity: High (get in touch with angle > 100 °).

Handling and Storage

Store in a dry, amazing area. Keep containers sealed when not being used. Avoid call with dampness. Usage common dirt control actions throughout handling. Put on gloves and eye protection as a standard safety action. This item is non-toxic yet ought to not be inhaled in large amounts.

Applications of China fumed silica R202 countertype amorphous powder hydrophobic fumed silica HB 139

Applications of China Fumed Silica R202– Hydrophobic Fumed Silica HB-139

Enlarging and Anti-Settling Agent

China fumed silica R202 (HB-139) functions well as a thickener in several liquid systems. It quits strong particles from sinking to the bottom. This keeps items like paints, coatings, and adhesives stable over time. The powder mixes quickly and provides consistent structure without clumping.

Support in Silicone Rubber

In room temperature vulcanizing (RTV) silicone rubber, R202 fumed silica includes toughness and enhances tear resistance. Its hydrophobic surface area bonds well with silicone polymers. This makes the last rubber more durable and flexible, even under tension or severe temperature levels.

Free-Flow Help for Powders

Dry powder products such as flavors, detergents, or pharmaceuticals commonly stick. Adding a small amount of HB-139 hydrophobic fumed silica stops caking. It coats each bit so they stream easily. This assists with accurate application and smooth handling during manufacturing.

Matting and Surface Area Control

Paints and industrial coatings use R202 silica to develop a matte coating. It controls gloss by scattering light externally. At the same time, it boosts scratch resistance and surface area feel without hurting clarity in clear layers.

Sealants and Adhesives Efficiency Increase

In building and construction sealants and commercial adhesives, hydrophobic fumed silica HB-139 offers much better sag resistance. It holds form when applied vertically. The material remains in area till it treatments. This decreases waste and guarantees tidy, expert outcomes.

This specialized silica is made through flame hydrolysis, then treated to push back water. That makes it perfect for moisture-sensitive applications. Its fine bit dimension and high surface provide solid efficiency at reduced dose degrees. Customers obtain reliable outcomes set after set.

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 China fumed silica R202 countertype amorphous powder hydrophobic fumed silica HB 139

Frequently Asked Questions About Hydrophobic Fumed Silica HB-139 (R202 Equivalent)

What is HB-139 hydrophobic fumed silica?

HB-139 is a high-quality hydrophobic fumed silica. It works as a thickening and anti-settling agent. This product is the direct countertype of China’s R202 grade. It has an amorphous powder structure and repels water well.

How does HB-139 differ from regular fumed silica?

Regular fumed silica is hydrophilic—it absorbs moisture. HB-139 is treated to become hydrophobic. That means it resists water. This makes it ideal for use in wet or humid environments where stability matters.

Where is HB-139 commonly used?

You’ll find HB-139 in many industrial products. These include adhesives, sealants, coatings, and paints. It also works well in cosmetics, inks, and some rubber compounds. Its main job is to control flow, prevent clumping, and keep mixtures stable over time.

What are the key performance benefits?

HB-139 gives strong thickening power even at low doses. It helps liquids stay uniform without separating. The powder mixes easily and keeps its effect under heat or storage stress. Because it’s hydrophobic, it won’t lose performance when exposed to moisture.

How should HB-139 be handled and stored?

Store HB-139 in a dry, cool place. Keep the container sealed when not in use. Avoid breathing the dust—use basic protective gear like a mask and gloves during handling. The product stays stable for long periods if kept away from moisture and contaminants.