• Product Overview: UV-327 (CAS 3864-99-1)

    UV-327 is a high-performance, high-molecular-weight benzotriazole ultraviolet light absorber. It is chemically 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol. This product provides outstanding UV protection for polymers, particularly engineering plastics requiring high-temperature processing. It exhibits strong absorption in the 300–400 nm range, with excellent thermal stability, low volatility, and minimal color contribution .

    Property Typical Value

    Appearance Pale yellow to light yellow crystalline powder

    Purity ≥99.0%

    Melting Point 154 – 158°C

    Loss on Drying ≤ 0.5%

    Absorption Max (λmax) ~315 nm, ~345 nm (in chloroform)

    Specific Gravity (20°C) ~1.18 g/cm

    Solubility & Compatibility Profile

    Parameter Details

    Solubility (20°C g/100g) Toluene: 15; Styrene: 13; Methyl methacrylate: 12; n-

    Butyl acetate: 7; Acetone: 3; Insoluble in water

    Polymer Compatibility Polycarbonate (PC), Polyamide (PA), Polyester (PET,

    PBT), Polyacetal (POM), Polyurethane (PU),Poly(methyl

    methacrylate) (PMMA), Polystyrene (PS), ABS,

    Polyethylene (PE), Polypropylene (PP)

    Recommended Dosage 0.1% – 1.0% by weight (typical 0.2-0.5% for most

    applications)

  • Performance Advantages
    High Thermal Stability: Withstands processing temperatures up to 300°C, ideal for engineering plastics (PC, PBT, PA, PET) .
    Low Volatility: Minimal weight loss during high-temperature processing .
    Strong UV Absorption: Broad absorption spectrum covering UV-A and UV-B (300–400 nm) .
    Excellent Compatibility: Good solubility in polymers and organic solvents .
    Synergistic: Works effectively with HALS and antioxidants .
    UV-327 is utilized across diverse sectors requiring high-temperature processing and long-term UV stability :
    Polycarbonate (PC) sheets & moldings
    Polyamide (PA) automotive parts
    Polyester (PET/PBT) engineering plastics
    Polyacetal (POM) components
    Automotive headlamp lenses
    Outdoor lighting covers
    Electrical/electronic components
    Sports equipment Industrial coatings
    Photographic materials
    Automotive & Transportation
    UV-327 is widely used in automotive polycarbonate glazing, headlamp lenses, and interior parts. It prevents yellowing and maintains optical clarity, retaining >90% light transmission after extended UV exposure .
    Electrical & Electronics
    In connectors, housings, and components made from PBT, PA, and POM, UV-327 protects against UV-induced degradation and color change, ensuring long-term reliability .
    Standard Packaging
    20 kg fiber drum with inner PE liner .
    25 kg cardboard box (custom packaging available) .
    500 kg big bag (upon request) .
    Storage Conditions
    Store in original sealed container in a cool, dry, well-ventilated area .
    Keep away from direct sunlight, heat sources, and oxidizing agents .
    Shelf life: Minimum 36 months from manufacture date when stored properly .

  • Frequently Asked Questions (FAQ)

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