●To improve the adhesion.
●Changes the resin property.
●Improves dispersion of the pigments
●Improves the mechanical property of the coatings.
STRUCTURE OF SILANE
●It can be vinyl,amino, methacryloxy, mercapto, others.
●Reaction mechanism on organic materials.
●Forms chemical bond with resin.
●It can be methoxy, ethoxy, dialkoxy and trimethoxy groups.
●Controls reactivity by size( bigger reacts slowly smaller reacts quickly)
Basics of Silane Chemistry:
Silanes are very reactive to moisture.
> Low molecular weight oligomers still act as adhesion promoters.
> Higher polymers become insoluble.
> Amino silanes are basic, therefore hydrolysis is self-catalyzing (pH 9-10).
> Amino silanes can make stable water based emulsions.
Hydrolysis slowest at pH ~7 Condensation slowest at pH ~4.5
- Methyltrimethoxy silane
- Vinyltrimethoxy silane
- 3-Glycidoxypropyltrimethoxy silane
- Aminoethylaminopropyltrimethoxy silane
- 3Methaacryloxypropyltrimethoxy silane and more grades as per customers requirement.
- Rubber & elastomers
- Plastic modification
- Silicone systems
- Epoxy systems
- Polyurethane systems
- Acrylic systems
- Water based systems