Hostavin® VSU powder
Hostavin VSU powder is an Oxalanilide UV absorber, a low volatile polar substance with good heat stability. It is resistant to discoloration with metal ions, e.g. from polymerization catalyst residues, fillers or from contact surfaces. Hostavin VSU powder absorbs the UV light especially in the UV-B range, and is therefore a stabilizer of choice for combinations with optical brighteners and for UV curing systems.
Product Information
- Excellent UV protection
- No discoloration
- Minimal sensitivity to side reactions ( resistance to coloration in presence of metal ions traces )
The product does not require a hazard warning label according CLP regulation (Regulation (EC) No. 1272/2008, as amended).
For further information please refer to the Material Safety Data Sheet.
Chemical nature: 2-Ethyl, 2´-ethoxy-oxalanilide
Classification: Oxalanilide UV absorber
Delivery Specifications and (*) General Properties
| Characteristics | Unit | Target value | Test method |
| Appearance | white powder | visual | |
| Loss on drying | [%] | max. 0.2 | QC-999-1065 (2h at 105°C) |
| Hazen color number | max. 45 | QC-999-1065 (5% in dioxane) | |
| Content active substance | [% (a/a)] | min. 98 | QC-20-0010 (GC area) |
Hostavin VSU powder can be used in solventborne coatings and general industrial coatings to provide standard UV stabilization performances. In particular, it is recommended for UV cured systems. To ensure optimal stabilization, clear coats require not only UV absorber but also HALS. Depending on the binder, a traditional HALS, e.g. Hostavin 3055 or Hostavin 3065, or a non-basic HALS, e.g. Hostavin 3058, should be used in combination with Hostavin VSU powder.
Hostavin VSU powder is recommended as a UV absorber especially for use in polyamides, polycarbonates, PVC, acrylates, alkyd/melamines, PU, and polyesters.
Delivery form
Powder
Packaging
Fibre drum 50 kg with PE-bag
Pallet 250 kg (5 drums)
Storage
For best shelf life store this product in a dry area at normal ambient temperatures.
Minimum shelf life is three years from the date of shipping when stored in cool and dry conditions, in the original sealed containers.
