Dynasylan® 4148

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

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.
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

Dynasylan® 4148 is a ready-for-use silane and is soluble in water and most organic solvents.

Product Details

Technical Data Sheets

Further Information

Storage:

The containers must remain tightly sealed during storage and kept in a well aired place. Protection against humidity is essential.
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.

Packaging:

Dynasylan® 4148 is supplied in pails with a capacity of 25 kg and drums with 200 kg.

Shelf life:

In the unopened container Dynasylan® 4148 has a shelf life of min. 12 months from delivery.

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