Dynasylan® for Pigment Modification
The hydrophilic surface of most mineral fillers and pigments can be made hydrophobic to be more compatible with hydrophobic organic resins. The result is improved dispersion of the mineral into the binder.
Dynasylan® react best with pigments and fillers that possess chemically active sites. A general guide to silane-substrate reactivity is given below:
Excellent reactivity
- Fumed silica
- Glass fiber
- Glass beads
- Quartz
Good reactivity
- Iron oxides
- Mica
- Corundum
- Kaolin (clay)
- Titanium dioxide
Slight reactivity
- Talc
- Other inorganic pigments
Poor reactivity
- Carbon black
- Calcium carbonate
- Graphite
Dynasylan® silicic acid esters may be used to encapsulate metallic pigment particles in a SiO2 network, making hydroxyl-poor surface more suitable for silane surface modification.
Organosilanes, most commonly called silanes can make a huge impact on coatings even in small amounts. They are well established as adhesion promoters and surface modifiers but they are increasingly used in many different ways in coatings. Using the chemistry of silanes in your formulation can help you offer new solutions.
The leader in silanes has focused its latest developments on very effective and easy-to-use silanes that respond to the current industry trends such as waterborne and high-solid solutions to formulate coatings emulsions, but also silane solutions fulfilling several functionalities in a single product.
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