myTechnical Documents
Dynasylan® MTMS is methyltrimethoxysilane. Acts as a crosslinker. It is a colorless, low-viscosity liquid. It is regarded as trifunctional since all three alkoxy groups are able to hydrolyze. Additionally Dynasylan® MTMS contains a methyl group that adds organic character to the products. Used in adhesives and sealants.
Details
1185-55-3
Methyltrimethoxysilane
- mar resistant coatings having a higher UV-stability than traditional organic coatings
- more flame resistant materials than using traditional resins
adhesives
sealants
coatings
Dynasylan® MTMS is listed on EINECS/ELINCS, AICS, DSL/NDSL, PICCS, TSCA, ECS, ENCS and ECL.
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. In some sol-gel applications Dynasylan® MTMS is partially hydrolyzed to form a pre-product that can be further crosslinked using temperature. This prehydrolysis often is done in conjunction with other organofunctional silanes (e.g. Dynasylan® GLYMO), silicic acid esters or even an aqueous silica sol. This pre-product can be modified even further by addition of organic resins or inorganic nanoparticles such as AEROSIL®.
Technical data
| Quantity | Value | Unit | Comment |
|---|---|---|---|
| Appearance Properties | |||
| Appearance | Colorless | ||
| Physical state | Fluid | ||
| Physical Properties | |||
| Viscosity | 0.5 | cP | DIN53015 ;20°C |
| Density | 0.96 | g/ml | DIN51757 ;20°C |
| Thermal Properties | |||
| flash point | 9 | ºC | DIN51755 |
| Boling point | 102 | ºC | DIN 51751 |
| Chemical Properties | |||
| Shelf Life | 12 | month | |