Dynasylan® PTEO is a colourless, low-viscosity liquid. Dynasylan® PTEO is regarded as trifunctional since all three alkoxy groups can hydrolyze. Additionally Dynasylan® PTEO contains a propyl group that adds a hydrophobic character to the coatings. Hydrolysis leads to silanol groups which, in a subsequent condensation reaction, form very stable siloxane bonds (-Si-O-Si-). Condensation occurs parallel to hydrolysis once a certain amount of silanol groups have been formed. The absolute and relative rates of hydrolysis and condensation depend on a number of factors. The most important factors include pH, concentration, solvent, temperature and the catalyst.
Typical Applications
In some sol-gel applications Dynasylan® PTEO is partially hydrolyzed to form a preproduct that can be further crosslinked using temperature. This pre-hydrolysis often is done in conjunction with other organofunctional silanes, silicic acid esters or even an a aqueous silica sol. This pre-product can be modified even further by addition of organic resins or inorganic nanoparticles such as AEROSIL®. This can also lead to more flame resistant materials than using traditional resins. Dynasylan® PTEO reacts slower with water than Dynasylan® PTMO and often a hydrolysis catalyst (mineral acids or ammonia, or even acetic acid and amines) must be added to hydrolyze at appreciable rates. Hydrolysis can also be furthered by adding a cosolvent such as ethanol.
Benefits at a glance
It is also possible to construct an inorganic/organic network by adding silanes containing organofunctional groups (e.g. aminopropyl groups) and organic resins. The mixture is then cured using standard organic methods. In this way it is possible to obtain mar resistant coatings having a higher UV-stability than traditional organic coatings.
Product Details
Technical Data Sheets
Further Information
Storage:
Dynasylan® PTEO must be stored with exclusion of moisture.
Packaging:
Dynasylan® PTEO is sold in plastic lined 25 kg and 180 kg steel drums.
Shelf life:
In the unopened container Dynasylan® PTEO has a shelf life of min. 12. months from delivery.