UV Absorber UV-328

Product Overview

UV Absorber UV-328 represents a premium class of benzotriazole-based light stabilizers designed to protect organic materials from photodegradation. This high-performance additive functions by absorbing harmful ultraviolet radiation and dissipating the energy as harmless heat, thereby preventing polymer chain scission and color fading. With a maximum absorption peak at 345nm, it provides robust protection across a broad spectrum of UV light. Our manufacturing process ensures exceptional purity levels, making it an ideal choice for demanding applications where long-term durability and aesthetic retention are critical.

Technical Specifications

Key Performance Features

This product exhibits superior compatibility with a wide range of resin systems, ensuring uniform dispersion without blooming or exudation. Compared to similar compounds like UV-326 and UV-327, UV-328 offers enhanced molecular weight characteristics which result in significantly lower heat volatility. This makes it particularly suitable for high-temperature processing conditions. The chemical structure provides excellent washing resistance, ensuring that the protective effects remain intact even after repeated exposure to moisture or cleaning agents. Furthermore, it demonstrates synergistic effects when used in combination with phenolic antioxidants, phosphite antioxidants, and hindered amine light stabilizers (HALS), creating a comprehensive stabilization package.

Industrial Applications

UV Absorber UV-328 is extensively utilized in the stabilization of various thermoplastic and thermoset materials. It is highly effective in polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyurethane (PU) formulations. The additive is also compatible with polyester, epoxy resins, ABS resins, and cellulose-based materials. In the coatings industry, it serves as a critical component for outdoor architectural coatings, automotive finishes, and industrial paints where weatherability is paramount. The recommended dosage typically ranges around 1% depending on the specific substrate and exposure conditions, providing a cost-effective solution for extending product lifespan.

Storage and Handling

To maintain optimal quality, this product should be stored in a cool, dry, and well-ventilated environment. Protection from direct sunlight and moisture is essential to prevent clumping or degradation. The material is classified as non-dangerous goods, facilitating straightforward logistics and transportation. Standard packaging involves 25kg cardboard drums lined with plastic bags to ensure integrity during shipping. Users are advised to follow standard industrial hygiene practices when handling chemical powders, including the use of appropriate personal protective equipment.