Dynasylan® A
- CAS Number
- 78-10-4
- Chemical Name
- Tetraethyl orthosilicate
- Chemical Family
- Silanes, SilicatesSilanesSilicates
Dynasylan® A is also known as TEOS (tetraethoxysilane), is the ethyl ester of orthosilicic acid. This colorless, low-viscosity liquid boasts a SiO content of 28.5%. Utilization involves acid- or alkali-catalyzed hydrolysis, leveraging all four ethoxy groups for reaction and earning it tetrafunctional status. Hydrolysis initiates silanol group formation, which further condenses to establish robust siloxane bonds (-Si-O-Si-). Notably, condensation begins before hydrolysis concludes, with ongoing condensation during storage resulting in gel formation. Gelation rate hinges on water concentration.
Properties
- Physical Form
- Liquid
Identification
- CASE Ingredients Features
- Abrasion ResistanceLow Viscosity
- CASE Ingredients Functions
- Adhesion PromoterCoupling AgentCrosslinking AgentDrying AgentSurface Modifier
Other characteristics
- Brand
- Dynasylan
- Synonyms
Ethyl Orthosilicate, Ethyl Silicate, Tetraethoxysilane, Tetraethyl Silicate
- Functions
Adhesion Promoter, Coupling Agent, Crosslinking Agent, Drying Agent, Surface Modifier
- Labeling Claims
- Low VOC
- Markets
- Adhesives & Sealants
- Building & Construction
- Electrical & Electronics
- Paints & Coatings
- Appearance
- Colorless. low - viscous liquid
- Shelf LIfe
- 12 months
- Technology
- CASE Ingredients
- Elastomers
- Industrial Additives & Materials
- Packaging Type
- Drums
- Material Features
- Low Viscosity
- Chemical Inventories
- ECL (Korea)
- EINECS (EU)
- ELINCS (EU)
- IECSC (China)
- TSCA (USA)
- Packaging Information
Dynasylan® A is supplied in 25 kg or 190 kg drums or in 850 kg containers.; Dynasylan® A must be stored with exclusion of moisture.
Technical data
Table 1 of 1
5 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Flash Point | 45.0 | °C | DIN 51755 |
| Density (at 20°C) | 0.94 | g/cm³ | DIN 51757 |
| Viscosity (at 20°C) | 0.75 | mPas | DIN 53015 |
| Silica Content (as SiO₂) | 28.3 - 29.1 | % wt | AN-SAA 0851 |
| Initial Boiling Point | 167.0 | °C | DIN 51751 |
