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Dynasylan® 4148

Technical Datasheet | Supplied by Evonik
Dynasylan® 4148 by Evonik is polythylene glycol-alkyl functional alkoxysilane-based rheology modifier for highly filled thermally conductive adhesives and sealants. It helps to control rheological properties and to reduce viscosity in highly-filled polymer systems, like aluminum trihydroxide filled polyesters or SMC pastes.
  • It features chemical polarity yet remaining chemically not reactive.
  • It 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 can be used for the pretreatment of the filler or pigment.
  • It is listed with DSL/NDSL, TSCA, IECSC, ENCS, ECL and EINECS/ELINCS.
  • It has a minimum shelf life of 12 months.
ORIGINAL DATASHEET
Dynasylan® 4148
Technical Datasheet | Supplied by Evonik
ORIGINAL DATASHEET
Product Type
  • Rheology Modifiers / Viscosity Modifiers / Thickeners
  • Polymer Modification
Chemical Composition
Polyethyleneglycolfunctional alkoxysilane
Physical Form
Liquid
Appearance
Yellow, yellowish
Product Status
COMMERCIAL
Applications/ Recommended for
  • Adhesives
  • Sealants
Labels/Agency Rating
DSL/NDSL,
TSCA,
IECSC,
ENCS,
ECL,
EINECS/ELINCS

Dynasylan® 4148 Properties

Property

Value & Unit
Test Condition
Test Method
Flash Point
> 95 °C
EN 22719
Freezing Point
< -10 °C
DIN ISO 3016
Density
1.1 g/cm3
(At 20°C)
DIN 51757

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