Knowde Enhanced TDS
Identification & Functionality
- Chemical Name
- CASE Ingredients Functions
- Plastics & Elastomers Functions
Features & Benefits
- Labeling Claims
- CASE Ingredients Features
- Materials Features
Applications & Uses
- Applications
- Compatible Polymers & Resins
- Industrial Additives End Use
- Application Characteristics
- Dynasylan® A is a ready source of silicic acid for many applications.
- Silicic acid in usually obtained by hydrolysis, or thermally by condensation at elevated temperature.
- The resulting silicic acid bonds well to many inorganic substrates and can be deposited in sit in a controlled manner.
- The surfaces of glass, metals, pigments, fillers and synthetic fibers can be coated with a very thin SiO, layer in order to improve chemical and thermal stability and mechanical properties.
- Other applications are:
- crosslinkers in silicone rubber systems
- drying agents in sealing compositions
- Dynasylan® A is an important starting material for sol-gel processes, where the additional use of alkylalkoxysilanes (e. g. Dynasylan® MTES can give the siloxane network a somewhat organic character as a result of the incorporation of alkyl groups.
- It is also possible to construct an inorganic/ organic network by adding silanes containing organofunctional groups (e.g. aminopropyl groups) and polymerizing with organic precursors. This principle makes it possible to obtain highly scratch- and abrasion-resistant coatings.
- Dynasylan® A is immiscible with water, so hydrolysis requires the use of a cosolvent such as ethanol. Suitable catalysts are mineral acids or ammonia, or even acetic acid and amines.
- Partial hydrolysis gives hydrolysates of Dynasylan® A whose shelf life depends on the amount of water and solvent used. The amount of water determines the activity of the hydrolysate.
- Activity and shelf life are inversely proportional. The correct choice of the amount of water can give hydrolysates which have a shelf life of up to a year.
Properties
- Physical Form
- Appearance
- Colorless. low - viscous liquid
- Technical Data
| Value | Units | Test Method / Conditions | |
| 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 |
Regulatory & Compliance
- Chemical Inventories
Packaging & Availability
- Packaging Type
- 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.
Storage & Handling
- Shelf Life
- 12 months