• Product Overview: UV-770 (CAS 52829-07-9)

    UV-770 is a low molecular weight hindered amine light stabilizer (HALS) that provides exceptional protection against UV-induced degradation in polymers. Chemically bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, it functions as a highly effective radical scavenger, protecting organic polymers from degradation caused by exposure to ultraviolet radiation [citation:8]. Unlike UV absorbers, UV-770 works by trapping free radicals formed during photo-oxidation, and its effectiveness is less dependent on material thickness, making it ideal for films, fibers, and thin sections

    Property Typical Value

    Appearance White to off-white crystalline powder or granules

    Purity (HPLC) ≥99.0%

    Melting Point 81 – 86°C

    Molecular Weight 480.74 – 481 g/mol

    Density (20°C) ~1.05 g/cm³

    Flash Point >150°C

    Volatiles (105°C, 2hrs) ≤0.2-0.5%

    Solubility & Compatibility Profile

    Parameter Details

    Transmittance (425 nm) ≥98% (min 99% in some grades)

    Transmittance (500 nm) ≥99%

    Solubility in Water (20°C) <0.01 g/100g (insoluble)

    Solubility in Acetone (20°C) 19 g/100g

    Solubility in Ethanol (20°C) g/100g

    Solubility in Ethyl Acetate (20°C) 24 g/100g

    Solubility in Benzene (20°C) 46 g/100g

    Solubility in Hexane (20°C) 5 g/100g

  • Performance Advantages
    Radical Scavenger (HALS): Traps free radicals formed during photo-oxidation, interrupting the degradation cycle
    Regenerative Mechanism: HALS regenerates during the stabilization process, providing long-term protection
    Thickness Independent: Effectiveness less dependent on material thickness than UV absorbers; ideal for films, tapes, and thin sections
    Excellent Compatibility: Compatible with PP, PE, PU, PS, ABS, SAN, ASA, PA, POM, and more.
    Synergistic: Works effectively with UV absorbers and antioxidants to enhance overall stability
    Low Toxicity: Approved for food contact applications in some regions with usage limits.
    UV-770 is a versatile HALS widely used in plastics, coatings, and adhesives where long-term UV protection is required :
    Polypropylene (PP) films & moldings
    Polyethylene (PE) films
    Polyurethane (PU) foams & elastomers
    ABS / SAN / ASA polymers
    Polystyrene (PS) & HIPS
    Polyamide (PA) fibers & parts
    Polyacetal (POM) components
    TPO/EPDM automotive parts
    Solvent-borne industrial coatings
    Adhesives & sealants
    Powder coatings
    Polyolefin Applications
    UV-770 is particularly effective in polypropylene (PP) and polyethylene (PE) films, tapes, and molded articles. At 0.1-0.5% loading, it significantly extends service life by preventing embrittlement, discoloration, and loss of mechanical properties .
    Automotive & Engineering Plastics
    In automotive applications (TPO, EPDM, ABS, polyamides), UV-770 protects interior and exterior components from UV-induced degradation, retaining impact strength and appearance
    Coatings & Adhesives
    For solvent-borne industrial coatings, clear coats, and adhesives, UV-770 (0.5-2.0%) is recommended, often combined with UV absorbers like benzotriazoles for synergistic protection against gloss reduction, cracking, and delamination
    Storage Conditions
    Store in original sealed containers in a cool, dry, wellventilated area
    Temperature range: 5-30°C, humidity ≤65%
    Keep away from direct sunlight, heat sources (>40°C accelerates oxidation), and strong oxidizing agents/strong acids

  • Frequently Asked Questions (FAQ)

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