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UV absorber for plastic and coatings

Hostavin® 3326 powder

Hostavin 3326 powder is an UV absorber with broad absorption. Besides coating applications, it is mainly used as an UV stabilizer for a wide range of plastics.

  • Solventborne coating: UV absorber (BZT) with a high UV absorptivity and red shifted absorption, which makes it highly suitable for exterior wood protective coatings. Limited solubility in organic solvents.

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 Composition

Chemical nature:        Benzotriazole UV Absorber

Classification:             2-(3-tert-butyl-2-hydroxy-5- methylphenyl)-5-chlorobenzotriazole


Delivery Specifications and (*) General Properties

CharacteristicsUnitTarget ValueTest Method
Appearanceslightly yellowish crystalline powderQM-AA-634
Melting point[°C]137 - 142QM-AA-146
Transmission 460nm[%]min. 93QM-AA-120
Transmission 500nm[%]min. 96QM-AA-120
Application Coatings
Hostavin 3326 powder is particularly recommended in high end solvent borne wood protective coatings. The concentration should not exceed 1.0 to 1.5% of active stabilizer on solid resins, due to limited solubility. In clear coats, a combination from Hostavin 3326 powder and a radical scavenger (HALS) like Hostavin 3065 liq or Hostavin N30 powder is recommended, depending on the binder chemistry and the stabilization requirements.
Applications Plastics
Hostavin 3326 powder has a rather broad absorptivity in the UV-A and UV-B range. For this reason it is not only suitable for the protection of polymers. Applied in packaging materials, e.g. films, it also ensures a high level of protection for the good underneath the packing, e.g. textiles.
Packaging and Handling
Delivery form

Cardboard box 15 kg
Pallet 300 kg (20 cardboard boxes)

For best shelf life store in a cool and dry place.
Minimum shelf life is three years from the date of shipping when stored in cool and dry conditions, in the original sealed containers.

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Hostavin® 3326 powder

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