Clariant Hostavin® PR-25 granules is a granular high-efficiency UV-B absorber with core non-discolouring property. It can effectively block UV damage to substrates, has good compatibility with coating and plastic systems, and does not affect the original color and appearance stability of products.
Focuses on UV-B band absorption, can efficiently filter 280-320nm ultraviolet rays, and delay coating chalking and plastic yellowing aging.
Outstanding non-discolouring property, no color shift after contact with metal ions or long-term UV irradiation, suitable for light-colored and transparent products.
Granular form facilitates metering and addition, with low dust pollution during mixing, improving the convenience and safety of production operations.
Excellent compatibility with solvent-based/waterborne coatings, polyolefin/engineering plastic substrates, without affecting the mechanical and optical properties of the system.
Good extraction resistance and migration resistance, with long-lasting and stable protective effect, not easy to lose during use.
Suitable for solvent-based industrial coatings, providing weathering protection for metal components and mechanical equipment coatings, keeping the appearance long-lasting as new.
Compatible with waterborne wood clearcoats, achieving UV protection for outdoor wood without changing the wood texture and color.
Applicable to polypropylene (PP) and polyethylene (PE) films and injection-molded parts, improving the anti-aging life of outdoor plastic products.
Used in ABS, PC and other engineering plastic housings, ensuring the color stability of electronic appliances and automotive interior parts.
Suitable for powder coating systems, providing efficient UV shielding for outdoor building materials and furniture coatings, balancing environmental protection and weather resistance.
| 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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E-mail: wangxingqiang@ericwchem.com
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