Dynasylan® 4148 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, Dynasylan® 4148 features chemical polarity yet remaining chemically not reactive. Such a product is used as a hydrophilic compatibilizer rather than a covalent adhesion promoter.
Dynasylan® 4148 permits workable viscosities at well over 250 phr aluminum trihydroxide loading in unsaturated polyester resins. Further more, Dynasylan® 4148 can be used as anti-settling agent for corrosion inhibitors in glycol based cooling agents.
As a non-coupling silane Dynasylan® 4148 can also be used as a slipping agent to simply modify a surface.
Typical Applications
Pre-treatment of the filler or pigment is best achieved in a high-speed mixer by praying Dynasylan® 4148 into a well-agitated filler or pigment bed. In order to obtain maximum efficiency of the treated filler or pigment, a good distribution of Dynasylan® 4148 throughout the filler or pigment surface is essential.
If the surface area of a filler or pigment is unknown, 1 percent by weight of Dynasylan® 4148, based on filler or pigment, is a convenient initial basis for Pre-treatment. Subsequently, the exact Dynasylan® 4148 loading should be determined empirically.
Moreover, Dynasylan® 4148 can act as a lubricant and wetting agent in the glass fibre industry in combination with silane coupling agents.
As a non-coupling silane, Dynasylan® 4148 can dramatically reduce the dispersion viscosity of aluminum trihydroxide and many other fillers and pigments. Because of better wetting and dispersion, outstanding filler or pigment loadings at a given viscosity can be realized with Dynasylan® 4148.
Dynasylan® 4148 helps to increase pigment dispersion predominantly in aqueous media, thus leading to an enhanced gloss of a typical coating.
Benefits at a glance
Product Details
Technical Data Sheets
Further Information
Storage:
Protect from frost (avoid temperatures below 0 °C). The product becomes a solid when stored cold (e.g. at -10 °C) but can be recovered without deterioration after melting.