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.

(Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant)

Specification of Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant

Evonik AERSIL R 202 is a hydrophobic fumed silica. It is a specialty additive. Its main job is thickening. It also controls flow properties. This powder is very fine. It is white. It looks like fluffy snow. It works best in liquid systems. These systems need thickening. They also need anti-sagging properties.

The silica particles are tiny. They have a large surface area. This surface is treated. The treatment makes it repel water. Hydrophobic means water-repelling. This treatment matters. It helps the silica blend into non-polar systems. These include epoxy resins. Vinyl ester resins also use it. Gelcoats often need it too. Cable compounds benefit from it. Adhesives and sealants use it as well.

Adding this silica changes the liquid. It makes the liquid thicker. More importantly, it gives the liquid structure. This structure is weak. It breaks down under shear stress. Stirring or mixing applies shear. The liquid becomes thin and easy to work with. Stop mixing. The structure builds back up quickly. The liquid thickens again fast. This prevents dripping or sagging. It keeps fillers suspended. This property is called thixotropy.

Use AERSIL R 202 correctly. It improves application properties. It allows higher filler loadings. It reduces dripping on vertical surfaces. It helps prevent settling in storage. It gives better control during application. Workers find it easier to handle the thickened material. The final product often has a nicer surface finish. It works reliably in demanding applications.

(Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant)

Applications of Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant

Evonik AEROSIL R 202 hydrophobic fumed silica is a versatile material. It improves many products. This silica is treated to repel water. That makes it very useful. It works well in epoxy systems. Epoxy resins need thickening sometimes. AEROSIL R 202 does this job. It controls the viscosity. This stops the epoxy from sagging on vertical surfaces. Workers find application easier. The final coating is smoother. Vinyl ester resins also benefit. Adding this silica thickens the resin mix. It prevents settling of fillers. This keeps the mixture stable. It helps create strong, reliable composites.

AEROSIL R 202 acts as a thickener. It gives body to liquid systems. It is a powerful thixotropic agent. Thixotropy means a material thickens at rest. It flows easily when stirred or applied. This is perfect for gelcoats. Gelcoats form the outer layer on fiberglass parts. They must not run or drip after spraying. AEROSIL R 202 helps achieve this. It ensures an even, smooth surface finish.

Cable compounds use this silica. It thickens the adhesive or sealant. This prevents dripping during application. The sealant stays where it’s put. It improves the handling properties. Workers can apply it neatly. The sealant fills gaps effectively. It creates a durable, protective barrier. This hydrophobic silica boosts performance in many demanding applications.

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 Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant

Evonik AEROSIL R 202 is a hydrophobic fumed silica. It acts as a thickener and thixotropic agent. People use it in epoxy systems, vinyl resins, gelcoats, cable adhesives, and sealants. It makes these materials thicker. It stops them from dripping or sagging.

What is Evonik AEROSIL R 202? It is a fine powder made of silicon dioxide. The surface is treated to repel water. This makes it hydrophobic. It is a common additive for adjusting flow properties.

How does AEROSIL R 202 work? The tiny silica particles form a network inside the liquid resin or adhesive. This network traps the liquid. It increases viscosity. When you apply shear force, like stirring, the network breaks temporarily. The material flows easier. When you stop stirring, the network rebuilds. This stops sagging.

What are the main benefits? It thickens effectively at low doses. It gives excellent anti-sag properties. It improves suspension of fillers. It helps control application properties. It reduces dripping. It enhances moisture resistance due to its hydrophobic nature.

Where is AEROSIL R 202 typically used? You find it in epoxy systems for flooring or coatings. It thickens vinyl ester resins. It is used in gelcoats for boats. It modifies adhesives for cables. It improves sealants for construction or automotive uses.

How much AEROSIL R 202 should be used? The right amount depends on the base material. It depends on the desired thickness. It depends on the application method. Usually, 0.5% to 3.0% by weight is common. Start with a lower amount. Increase slowly until you get the right flow. Mix it well into the system.

(Evonik AERSIL R 202 Hydrophobic Fumed Silica Epoxy Vinyl Resin Thickener Thixotropic Agent Gelcoat Cable Adhesive Sealant)