Highly effective UV absorption in the critical 300–400 nm range, providing superior photostabilization for organic substrates.
Excellent thermal and hydrolytic stability, ensuring consistent performance during high-temperature processing (e.g., extrusion, injection molding).
Low volatility and minimal migration, supporting long-term durability in demanding outdoor applications.
Good compatibility with a broad range of polymers including polyolefins, styrenics, engineering plastics, and coatings.
Non-discoloring performance—maintains substrate clarity and color fidelity over extended UV exposure.
Polypropylene (PP) and polyethylene (PE) automotive interior parts exposed to sunlight.
Exterior architectural coatings and industrial maintenance paints requiring weather resistance.
Transparent polycarbonate (PC) glazing and lighting diffusers for outdoor use.
Styrenic-based consumer goods such as housings, appliances, and garden furniture.
Flexible and rigid PVC profiles for window systems and façade elements.
| Chemical Type | Hydroxyphenyl benzotriazole (HPBT) |
| Product Form | Free-flowing off-white to light yellow crystalline powder |
| Appearance | Crystalline solid, free of visible impurities |
| Molecular Weight | 349.4 g/mol |
| Melting Point | 135–140 °C (determined by DSC) |
| Solubility (20 °C) | Soluble in common organic solvents (e.g., toluene, xylene, THF); low solubility in water |
| UV Absorption Maximum (λmax) | ~342 nm (in ethanol) |
| Primary Applications | Plastics, coatings, adhesives, and elastomers requiring UV protection |
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E-mail: wangxingqiang@ericwchem.com
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