Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

BASF Chimassorb 81 UV Absorber

BASF Chimassorb 81 is a high-performance benzotriazole-type UV absorber from BASF’s Chimassorb series, offering exceptional light stability and thermal resistance for polymers like polyolefins, PVC, and engineering plastics. It prevents photodegradation, maintains color fidelity, and ensures long-term mechanical integrity under intense UV exposure.
  • basf chimassorb 81 uv absorber_f81f4997
  • basf chimassorb 81 uv absorber_f81f4997

Features Of BASF Chimassorb 81 UV Absorber

  1. Highly effective benzotriazole-based UV absorber with strong absorption in the critical 300–400 nm range.

  2. Excellent compatibility with a broad range of polymers including polyolefins, styrenics, and engineering thermoplastics.

  3. Good thermal stability up to 280 °C, supporting high-temperature processing such as injection molding and extrusion.

  4. Low volatility and minimal migration, ensuring long-term UV protection and reduced surface blooming.

  5. Light-colored, free-flowing powder with consistent particle size distribution for reliable dosing and dispersion.

Typical Applications Of BASF Chimassorb 81 UV Absorber

  1. Automotive interior components (e.g., dashboards, trim, and pillar covers).

  2. Outdoor plastic furniture and garden products exposed to direct sunlight.

  3. Polypropylene and polyethylene films for agricultural and packaging applications.

  4. Exterior building and construction profiles (e.g., window frames, cladding, and roofing membranes).

Specifications Of BASF Chimassorb 81 UV Absorber

Chemical TypeBenzotriazole derivative
Product FormFree-flowing crystalline powder
AppearanceOff-white to light yellow powder
Melting Range135–140 °C
UV Absorption Maximum (λmax)345 nm (in chloroform)
SolubilitySoluble in common organic solvents; low solubility in water
Primary ApplicationsPolyolefins, ABS, PS, PC, and PVC
Key FeaturesHigh UV absorption efficiency, low volatility, excellent polymer compatibility


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