company tower banner
Evonik Company Logo

AEROSILĀ® R 208

1 of 33 products in this brand
AEROSILĀ® R 208 is a fumed silica aftertreated with polydimethylsiloxane with excellent thickening properties.

Chemical Name: Hydrated Silica, Silane, trimethoxyoctyl-, hydrolysis products with silica, Silica gel, pptd., cryst.-free

Functions: Thixotrope

Chemical Family: Silica

Message our experts with questions
Victor Lifton avatar

Victor Lifton

Technical Sales

Please reach out to me with any questions, I am happy to assist you in finding the right product or learning more about our storefront

The Silica Specialists At Evonik North America avatar

The Silica Specialists At Evonik North America

Sales

Please reach out to me with any questions, I am happy to assist you in finding the right product or learning more about our storefront

TF

Tim Fraats

Digitalization

Please reach out to me with any questions, I am happy to assist you in finding the right product or learning more about our storefront

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Composite Materials Functions
CAS No.
67762-90-7

Features & Benefits

Materials Features
Product Features
  • The silicone oil treatment guarantees the very marked hydrophobia of the product
  • Very efficient effect in the thickening and thixotropy of complex polar liquids, such as those based on epoxy, polyurethane, or vinylester resins
  • With silicone oil treatment, AEROSILĀ® R 208 offers a tailor-made chemical surface treatment.
  • The high hydrophobicity of PDMS-treated, small particle AEROSILĀ® grades makes them particularly effective for achieving a high tribo-charge.
  • At the same time, PDMS-treated, small particle AEROSILĀ® grades maintain good flowability.

Applications & Uses

Cable Gel Applications

Use of AEROSILĀ® fumed silica for cable gels gives excellent performance when it comes to shear-thinning, providing quick recovery and the gel does not require heat to be applied. AEROSILĀ® fumed silica improves properties of oil-based filling compounds for wire and cables to protect fibers (e. g. optical fibers) as it:

  • Supports to isolate sensitive optical fi bers from external forces
  • Protects the fi bers from moisture
  • Provides thickening to help the gel to stay where it is placed
  • Helps to form a seal to keep out contaminants like dust, dirt and water
  • Is non-conductive / does not negatively infl uence di-electrical properties
Applications
  • Thickening and thixotropy control of adhesives and sealants for fiberoptic cables
  • Thickening and thixotropy control of epoxy and vinylester resins
  • Booster silica for defoamer formulations
  • Anti-sedimentation aid for fillers, such as chalk or quartz powder
  • Additive for formulation of anti-corrosion systems
  • Improves flowability of powders
  • Enables achieving of a high tribo-charge

Properties

Physical Form
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Specific Surface Area (BET)80 - 140mĀ²/g-
Carbon Content (based on ignited material)4.5 - 6.5%-
Note

* ex plant

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Country Availability
Packaging Type
Regional Availability
  • North America
Packaging Information

AEROSILĀ® R 208 is supplied in multiple layer 10 kg bags.

Storage & Handling

Shelf Life
2 years
Storage Conditions

Recommend storage of the product in closed containers under dry conditions as well as protection from volatile substances. AEROSILĀ® R 208 should be used within 2 years after production.