AEROSIL® R 202

AEROSIL® R 202 is a fumed silica surface-treated with polydimethylsiloxane with very good thickening properties.

Principal: Evonik Corporation Silicas

Functions: Anti-Sedimentation Agent, Reinforcement Agent, Thickener, Thickener, Thickener

Chemical Family: Silicones

End Uses: 2K (2 component) Coating, Cable Gels, Chalks, Fiber Optic Cable, Gelcoat, Quartz, Toner

Compatible Polymers & Resins: Epoxies (EP), Polyurethanes (PU), Vinyl Esters

Benefit Claims: Water Retention

Features: Anti-Settling, Excellent Electrical Insulation, Excellent Flowability, Hydrophobic, Improves Flow, Low Water Absorption, Sag Resistance

  • TypeDocument Name
View All Documents

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Coating End Applications
Compatible Polymers & Resins
Industrial Additives End Use
Ink & Toner End Applications
Plastics & Elastomers End Uses
Markets
Applications
Product Applications
  • Thickening and thixotropy control of adhesives and sealants for fiberoptic cables
  • Thickening and thixotropy control of epoxy and vinylester resins and gelcoats
  • Thickening and thixotropy control of cable gels, lubricants, and cosmetic formulations
  • 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
Processing Information
  • Addition to the coating as supplied or as a predilution is possible.

Properties

Physical Form
Key Properties
  • The silicone oil treatment guarantees the marked hydrophobia of the product 
  • Highly efficient effect in the thickening and thixotropy of complex polar liquids, such as those based on epoxy, polyurethane, or vinylester resins 
  • Improves the water resistance of moisture-sensitive formulations, such as cosmetic preparations
  • Improvement of the anti-settling behavior of pigments and anti-sagging behavior in 2-C epoxy coatings.
  • With silicone oil treatment, AEROSIL® R 202 offers a tailor-made chemical surface treatment.
  • Due to its excellent electrical insulating ability and low water absorption, this hydrophobized, small-particle silica easily acquires and conserves electrical charge.
  • It is therefore typically used as a surface additive for toner particles in order to increase charge and improve flowability.
  • 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.
  • The slightly oily effect of the PDMS treatment provides additional benefits in some printing processes.

Regulatory & Compliance

Safety & Health

Safety Precautions
  • AEROSIL® R 202 should be used within 2 years after production.

Packaging & Availability

Packaging Type
Product Packaging
  • AEROSIL® R 202 is supplied in multiple layer 10 kg bags.
  • We recommend to store the product in closed containers under dry conditions and to protect the material from volatile substances.

Other

Apparent Tamped Density
60.0 g/L
Autoignition Temperature (SDS)
860.0 °F
Carbon Content
3.5-5.0 %
Color (SDS)
White
Decomposition Temperature (SDS)
min. 572.0 °F
Density (SDS)
2.0 g/cm³
Density (SDS)
2.0 g/cm³
Explosive Nature (SDS)
Not dust explosive
Item Number
Moisture Content
max. 0.5 %
Odor (SDS)
Odorless
Other Hazards
None.
Principal
Shelf Life
2.0 yr
Silicon Content
min. 99.8 %
Solubility In Water (SDS)
min. 1.0 mg/L
Specific Surface Area
80.0-120.0 m²/g
pH
4.0-6.0
pH (SDS)
4.0-6.0
pH (SDS)
4.0-6.0
pH (SDS)
40.0
Chemical Properties
ValueUnitsTest Method / Conditions
pH4.0-6.0-in 4% dispersion
Shelf Life & Stability
ValueUnitsTest Method / Conditions
Shelf Life2.0 yryr
Physical Properties
ValueUnitsTest Method / Conditions
Apparent Tamped Density60.0 g/Lg/LISO 787-11
Moisture Contentmax. 0.5 %%at 105°C, 2 hr
Specific Surface Area80.0-120.0 m²/gm²/gBrunauer-Emmett-Teller (BET)
Material Composition
ValueUnitsTest Method / Conditions
Carbon Content3.5-5.0 %%
Silicon Contentmin. 99.8 %%based on ignited material, as silicon dioxide
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Autoignition Temperature (SDS)860.0 °F°FVDI 2263
Decomposition Temperature (SDS)min. 572.0 °F°F
Density (SDS)2.0 g/cm³g/cm³at 20°C
Density (SDS)2.0 g/cm³g/cm³at 68°F
Solubility In Water (SDS)min. 1.0 mg/Lmg/L
pH (SDS)4.0-6.0-at 20°C
pH (SDS)4.0-6.0-at 68°F
pH (SDS)40.0-at 20°C, 40 g/l, 1:1 in suspension