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Adhesives Ingredients
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Dynasylan® 4148

Technical Datasheet | Supplied by Evonik
Dynasylan® 4148 by Evonik is polythylene glycol-functional alkoxysilane. Helps to control rheological properties and to reduce viscosity in highlyfilled polymer systems, like aluminum trihydroxide filled polyesters or SMC pastes. Contrary to most other organofunctional silanes, it features chemical polarity yet remaining chemically not reactive. Such a product is used as a hydrophilic compatibilizer rather than a covalent adhesion promoter. It permits workable viscosities at well over 250 phr aluminum trihydroxide loading in unsaturated polyester resins. Furthermore, it 4148 can be used as anti-settling agent for corrosion inhibitors in glycol based cooling agents. As a non-coupling silane it can also be used as a slipping agent to simply modify a surface. Dynasylan® 4148 can be added neatly to a blend of filler or pigment and resin, or it can be used for the pretreatment of the filler or pigment.
Product Type
  • Rheology Modifiers / Viscosity Modifiers / Thickeners
  • Polymer Modification
Chemical Composition
Polyethyleneglycolfunctional alkoxysilane
Physical Form
Yellow, yellowish
Product Status
Applications/ Recommended for
Bio Based
Labels/Agency Rating

Dynasylan® 4148 Properties


Value & Unit
Test Condition
Test Method
Density @ 20°C
1.1 g/cm3
Viscosity @ 20°C
10 - 20 mPa.s
Flash point
> 95 °C

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