Clariant Hostavin® PR-31 P is a HALS with UV absorption performance, featuring outstanding stabilization efficiency. It can be firmly anchored in binders or polymer matrices under UV exposure, with minimal migration and loss, providing long-term weathering protection for substrates.
Integrates dual action mechanisms of UV absorption and free radical scavenging, providing multi-dimensional protection against UV-induced substrate degradation.
Has matrix anchoring property, can tightly bind to the molecular chains of binders or polymers during UV exposure, with excellent migration resistance.
High light stabilization efficiency, a small amount of addition can significantly delay coating gloss loss, chalking and plastic yellowing, embrittlement and other aging phenomena.
Excellent compatibility with solvent-based/waterborne coatings, polyolefin/engineering plastics and other systems, without affecting the mechanical and optical properties of substrates.
Outstanding temperature resistance, can withstand high-temperature environments of coating baking and plastic processing, maintaining stable performance throughout the process.
Suitable for automotive OEM and refinish paint systems, providing long-term UV aging resistance protection for vehicle coatings and maintaining surface gloss.
Compatible with polyolefin plastic products such as polypropylene (PP) and polyethylene (PE), like outdoor building materials and agricultural films, to extend service life.
Applicable to polyester and polyurethane coatings, improving the weathering stability of coatings for industrial equipment and hardware components.
Used in engineering plastic housings such as PC and ABS, ensuring the integrity of appearance and performance of electronic and electrical products during long-term use.
Suitable for powder coatings, offering high-efficiency weathering protection for coatings of outdoor guardrails and furniture, meeting the requirements of environmentally friendly coating.
| Characteristic | Unit | Target Value |
|---|---|---|
| Chemical Type | - | Benzotriazole Derivative |
| Appearance | - | Off-white granular solid |
| Particle Size (D50) | μm | 300–500 |
| UV Absorption Peak | nm | ~310 (UV-B) |
| Melting Point Range | °C | 105–115 |
| Bulk Density | g/cm³ | 0.7–0.9 |
| Solubility (Toluene) | g/100g | ≥ 30 (25°C) |
| Non-discolouration Performance | - | Pass (after 1000h QUV test) |
| Storage Stability | - | 24 months (sealed, dry, cool) |
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