Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Plastics & Elastomers Functions
- Technologies
Features & Benefits
- Labeling Claims
- Materials Features
- Reactivity
- Dynasylan® 6598 is a colorless, nearly odorless low-viscosity liquid.
- Dynasylan® 6598 is an excellent silane compatibiliser between inorganic fillers (e.g. kaolin, MDH, ATH) and organic polymers (EPDM, EVA, PE).
- The application of Dynasylan® 6598 in mineral-filled and peroxide-crosslinked cable systems results in improved mechanical and electrical properties, especially upon exposure to moisture.
- The high boiling start of Dynasylan® 6598, together with its high flash point, gives it several advantages over monomeric silanes with respect to safety, handling and processing.
- From an environmental viewpoint it should be noted that the amount of released hydrolysis ethanol (VOC) is considerably less than for monomeric silanes.
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Application Characteristics
- Dynasylan® 6598 is excellent as an adhesion promoter in mineral-filled, peroxide-crosslinked compounds.
- The silicon- functional ethoxy groups of Dynasylan® 6598 hydrolyse in the presence of moisture, which is usually present on the filler surface, forming active silanol groups.
- The condensation of these silanol groups with hydroxyl groups on the filler surface leads to a tight chemical bond between Dynasylan® 6598 and the filler.
- The vinyl functional end of Dynasylan® 6598 can be coupled to the polymer in a further reaction that runs parallel to peroxide crosslinking.
- The propyl groups of Dynasylan® 6598 are hydrophobic and result in markedly improved electrical properties of the filled compounds, especially after exposure to water.
- A major field of application for mineral-filled compounds is the cable industry.
- EPDM and kaolin can be processed into cable compounds through the adhesion promoting and hydrophobic effects of Dynasylan® 6598.
- It can also be used in the manufacture of halogen-free, non-toxic, environmentally- friendly flame retardant compounds (HFFR) based on EVA or PE and ATH or MDH.
- In addition, Dynasylan® 6598 can be used in many other applications such as filler and pigment treatment, use in dispersions etc.
- Typical property improvements obtained by using Dynasylan® 6598 in filled polymers are:
- improved filler dispersion.
- increased hydrophobicity that results in improved electrical values (dielectric constant e r, electric dissipation factor tand , volume resistivity rD) especially after exposure to water/ moisture.
- increase in maximum filler loading.
- excellent balance between tensile strength and elongation at break at a high level.
- improved heat resistance.
- improvement of creep behavior at increased temperature.
- improved chemical resistance.
- strongly reduced tendency to stress cracking.
- higher impact strength.
- higher abrasion resistance.
- good processability.
Properties
- Color
- Physical Form
- Appearance
- Colorless. low - viscous liquid
- Odor
- Nearly odorless
- Technical Data
| Value | Units | Test Method / Conditions | |
| Density (at 20°C) | approx. 1 | g/cm³ | DIN 51757 |
| Boiling Point (at 1013 hPa) | min. 255 | °C | ASTM D-1120 |
| Viscosity (at 20°C) | approx. 3 - 7 | mPa.s | DIN 53015 |
| Flash Point | min. 70 | °C | DIN EN ISO 2719 (Pensky-Martens, closed-cup) |
| Silica Content (as SiO₂) | approx. 42 | % w/w | AN-SAA 0754 |
| Residual Moisture | 0.18 | % | — |
| Evolved VOC (Methanol) | 465.0 | g/kg | — |
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- Electrical Properties
The diagram to the right illustrates the positive eff ect of Multifunctional Silane SystemsTM on the dissipation factor of calcined clay-filled EPDM rubber cables a er exposure to water. Positive effects include, for example, an improvement of wet-electrical properties in rubber power cables.
Dynasylan® 6598 significantly improves electrical properties
The performance of Dynasylan® treatment versus other surface treatments in a filled-rubber formula- tion: The dissipation factor is significantly improved as a result of the significantly reduced water up-take.
Packaging & Availability
- Packaging Type
- Packaging Information
- Dynasylan® 6598 is supplied in 25 kg, 200 kg drums and 900 kg ibc containers.
- The containers must remain tightly sealed and stored in a cool, well-ventilated place protected against moisture.
Storage & Handling
- Shelf Life
- 12 months