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Adhesives Ingredients
The material selection platform
Adhesives Ingredients
by SpecialChem
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Dynasylan® 4148

Technical Datasheet | Supplied by Evonik
Dynasylan® 4148 by Evonik is polythylene glycol-functional alkoxysilane. It helps to control rheological properties and to reduce viscosity in highly-filled 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. It 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. Listed with DSL/NDSL, bTSCA, IECSC, ENCS, ECL and EINECS/ELINCS. It has a minimum shelf life of 12 months.

Dynasylan® 4148

Technical Datasheet | Supplied by Evonik
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, DIN 51757
1.1 g/cm3
Viscosity @ 20°C, DIN 53015
10 - 20 mPa.s
Flash Point, EN 22719
> 95 °C

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