UV Absorber 328

Product Overview

UV Absorber 328 represents a premium class of benzotriazole-based ultraviolet stabilizers designed to protect polymeric materials from degradation caused by prolonged sunlight exposure. Chemically identified as 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol, this compound functions by selectively absorbing harmful UV radiation within the 270 to 340 nanometer range and dissipating the energy as harmless thermal heat. This mechanism significantly extends the service life of plastics and coatings, preventing common failure modes such as surface cracking, yellowing, and loss of mechanical tensile strength.

Our manufacturing process ensures exceptional purity levels, making this product an ideal choice for demanding applications where long-term weatherability is critical. Unlike standard stabilizers, UV Absorber 328 offers superior compatibility with a wide range of resin systems, ensuring uniform dispersion without negatively affecting the optical clarity or physical properties of the final manufactured product.

Key Performance Features

• Exceptional thermal stability with low volatility during high-temperature processing.
• High washing resistance, ensuring durability in outdoor and harsh environments.
• Broad compatibility with polyolefins, engineering plastics, and elastomeric materials.
• Effective absorption peak specifically tuned between 270 nm and 340 nm.
• Non-toxic and non-corrosive formulation suitable for diverse industrial sectors.

Technical Specifications

Industrial Applications

This specialized chemical is extensively utilized in the stabilization of polyolefins, particularly polyethylene and polypropylene, where it prevents photo-oxidative degradation. It is also highly effective in polyester, styrenic polymers, polyamides, polymethyl methacrylate (PMMA), polycarbonate, and various elastomeric materials. Manufacturers in the automotive, agricultural packaging, and construction sectors rely on this additive to maintain the aesthetic and structural integrity of products exposed to harsh weather conditions. Its low volatility makes it particularly suitable for thick-section articles where migration to the surface must be minimized.

Quality Assurance and Safety

Every batch undergoes rigorous quality control testing to ensure compliance with international standards. We provide comprehensive Certificates of Analysis (COA) with each shipment. UV Absorber 328 is classified as non-dangerous goods for transport and storage. It is non-toxic, non-flammable, and non-explosive under normal handling conditions. The product exhibits excellent storage stability when kept in original sealed containers.

Packaging and Storage

The material is packaged in sturdy cardboard drums lined with plastic bags to prevent moisture absorption, with a standard net weight of 25kg per drum. Custom packaging solutions are available to meet specific logistical requirements. It should be stored in a cool, dry, and well-ventilated area away from direct sunlight and heat sources. With proper storage protocols, the material maintains its specified properties over extended periods.