Speciality Chemicals

UV Absorber UV-329

  • CAS No.3147-75-9
  • GradeIndustrial / Pharmaceutical
  • Availability● In Stock

High-efficiency benzotriazole UV absorber designed for superior light stabilization in polymers and packaging materials.

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Product Technical Details

Product Overview

Our premium UV Absorber UV-329 represents a pinnacle in light stabilization technology, specifically engineered to protect polymeric materials from the deleterious effects of ultraviolet radiation. As a high-performance benzotriazole derivative, this compound functions by absorbing harmful UV rays and dissipating the energy as harmless heat, thereby preventing photo-oxidative degradation. This mechanism ensures the longevity and aesthetic integrity of plastic products exposed to sunlight and artificial lighting conditions.

Manufactured under strict quality control protocols, our UV-329 delivers consistent purity levels exceeding industry standards. It is an ideal solution for manufacturers seeking to enhance the durability of their formulations without compromising optical clarity. The product exhibits excellent compatibility with a wide range of resin systems, making it a versatile choice for diverse industrial applications.

Technical Specifications

ParameterSpecification
AppearanceOff-white powder
Content (Purity)≥99%
Melting Point154-157°C
Volatile Matter≤ 0.5%
Ash Content≤ 0.1%
Transmittance (460nm)≥97%
Transmittance (500nm)≥98%

Industrial Applications

This specialized UV absorber is widely utilized across the plastics and polymer processing industries. It is particularly effective in polyolefins such as PE and PP, as well as engineering plastics like PVC, PS, PC, and ABS resin. The compound is also suitable for use in epoxy resin systems and polypropylene fibers. Due to its low coloration and high transmittance properties, it is especially recommended for colorless, transparent, and light-colored products where visual clarity is paramount.

Common end-use applications include packaging materials, plastic containers, and food packaging boxes where regulatory compliance and safety are critical. The stability of the molecule ensures that it remains effective throughout the product lifecycle, providing reliable protection against weathering and UV exposure.

Performance Advantages

  • Superior light stabilization effect with minimal impact on visible light transmission.
  • Excellent thermal stability suitable for high-temperature processing conditions.
  • Low volatility reduces loss during extrusion and molding processes.
  • Compatible with various polymer matrices including rigid PVC and polymethyl methacrylate.
  • Ensures long-term retention of mechanical properties and surface gloss.

Storage and Handling

UV Absorber UV-329 demonstrates good storage stability under recommended conditions. To maintain optimal quality, the product should be stored in a cool, dry, and well-ventilated area. It is crucial to avoid exposure to high temperatures and humidity during storage and transportation to prevent moisture absorption or clumping. The material is classified as non-dangerous goods, facilitating easier logistics and handling procedures.

Standard packaging consists of cardboard drums lined with plastic bags, with a net weight of 25kg per drum. This packaging design ensures protection against environmental contaminants while maintaining ease of use for industrial feeding systems. We recommend conducting regular quality checks upon receipt to verify compliance with specified parameters.