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AEROSIL® R 208

1 of 33 products in this brand
AEROSIL® 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

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, AEROSIL® R 208 offers a tailor-made chemical surface treatment.
  • The high hydrophobicity of PDMS-treated, small particle AEROSIL® grades makes them particularly effective for achieving a high tribo-charge.
  • At the same time, PDMS-treated, small particle AEROSIL® grades maintain good flowability.

Applications & Uses

Cable Gel Applications

Use of AEROSIL® 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. AEROSIL® 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 - 140m²/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

AEROSIL® 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. AEROSIL® R 208 should be used within 2 years after production.