Tinuvin PA 328 is an ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class, which imparts outstanding light stability to plastics and other organic substrates.

The use levels of Tinuvin PA 328 range between 0.1 and 1.0 %, depending on substrate and performance requirements of the final application. Tinuvin PA 328 can be used alone or in combination with other functional additives such as antioxidants (hindered phenols, phosphites) and HALS light stabilizers, where often a synergistic performance is observed.

Applications

Tinuvin PA 328 is a highly effective light stabilizer for a variety of plastics and other organic substrates. Its use is recommended for the stabilization of styrene homo- and copolymers, acrylic polymers, unsaturated polyesters, polyvinyl chloride, polyolefins, polyurethanes, polyacetals, polyvinyl butyral, elastomers, and adhesives.

Features & Benefits

Tinuvin PA 328 features strong UV absorption, low initial color, excellent compatibility in a wide vari-ety of substrates, good solubility in plasticizers and monomers, and moderately low volatility. It protects polymers as well as organic pigments from UV radiation, helping to preserve the original appearance and physical integrity of molded articles, films, sheets, and fibers during outdoor weathering.

Properties

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