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Dynasylan® 6498

1 of 42 products in this brand
Dynasylan® 6498 is a concentrate of vinyl silane (oligomeric siloxane) containing vinyl and ethoxy groups. This low-viscosity liquid, nearly odorless and colorless, serves as a superb compatibilizer between inorganic fillers (such as kaolin, MDH, ATH) and organic polymers (including EPDM, EVA, PE).

Functions: Adhesion Promoter, Compatibilizer, Coupling Agent, Crosslinking Agent, Filler, Moisture Scavenger, Surface Modifier

Chemical Family: Organosilane

Labeling Claims: Low VOC

Compatible Polymers & Resins: Ethylene Propylene Diene Monomer (EPDM), Ethylene Vinyl Acetate (EVA), High-Density Polyethylene (HDPE), Polyethylenes (PE)

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
  • The high boiling point of Dynasylan® 6498, together with its high flash point, gives it outstanding advantages with respect to safety and handling during processing.
  • From an environmental viewpoint it should be noted that the amount of released hydrolysis ethanol (VOC) is significantly reduced compared to monomeric vinyl silanes.

Applications & Uses

Plastics & Elastomers End Uses
Use Level
0.67 phr
Application Characteristics
  • Dynasylan® 6498 is excellent as an adhesion promoter, dispersion and hydrophobation agent in mineral filled compounds.
  • In the presence of moisture, the ethoxy groups of Dynasylan® 6498 hydrolyse to produce ethanol and reactive silanol groups.
  • These silanol groups react with the filler via silicon-oxygen bridges.
  • The vinyl functional groups of Dynasylan® 6498 react with the polymer phase in the presence of radicals: A major field of application for mineral-filled compounds is the cable industry.
  • EPDM and EVA can be processed into highly filled cable compounds through the adhesion promoting and hydrophobising effect of Dynasylan® 6498.
  • The EPDM and EVA polymers with Dynasylan® 6498 are for the halogen-free, non-toxic, environmentally-friendly flame retardant cable compounds (HFFR) based on ATH and MDH.
  • In addition, Dynasylan® 6498 can be used in many other applications such as filler and pigment coating, dispersions etc.
  • Typical property improvements obtained by using Dynasylan® 6498 in filled polymers are:
    • improved filler dispersion.
    • good processability.
    • significantly reduced water-uptake excellent balance between tensile strength and elongation at break at a high level.
    • improved chemical resistance.
    • strongly reduced tendency to stress cracking.
    • higher impact strength.
    • higher abrasion resistance.


Physical Form
Colorless. low - viscous liquid
Nearly odorless
Mechanical Properties
ValueUnitsTest Method / Conditions
M.Scorch t5min. 16.91--
ML (1+4) (at 100°C)111.0ME-
Hardness (Shore A)65.0SH-
Tear Resistance36.0N/mm-
DIN Abrasion84.0mm³-
Comp. Set (for 22 h at 70°C)21.5%-
Comp. Set (for 22 h at 100°C)24.6%-
Tensile Strength14.1mPa-
Modulus (100%)1.6mPa-
Modulus (200%)2.7mPa-
Modulus (300%)4.3mPa-
Elongation (at Break)605.0%-
Technical Data
ValueUnitsTest Method / Conditions
Density (at 20°C)approx. 1g/cm³DIN 51757
Boiling Point (at 1013 hPa)min. 242°CASTM D-1120
Dynamic Viscosity (at 20°C)3 - 7mPa.sDIN 53015
Flash Pointmin. 75°CDIN EN ISO 2719 (Pensky-Martens, closed-cup)
Silica Content (as SiO₂)approx. 45% w/wAN-SAA 0754
Residual Moisture0.16%-
Evolved VOC (Methanol)480.0g/kg-

Regulatory & Compliance

Technical Details & Test Data

Electrical Properties

Electrical properties improve significantly with Dynasylan® 6598

Packaging & Availability

Packaging Type
Packaging Information
  • Dynasylan® 6498 is supplied in 25 kg containers, 200 kg drums and 1.000 kg bulk containers.

Storage & Handling

Shelf Life
12 months