GUARD DOG™ UV328 light stabilizer is a derivative of Benzotriazole that has exceptionally strong and broad-range of UV absorption properties throughout the UV spectrum specially designed for polymers and coatings. Due to its extended UV absorption capability, this product provides excellent protection for plastics, top coats and various light sensitive substrates. It is a highly recommended for thermoset plastics, organic substrates and coatings that function as ultraviolet screens for photosensitive substrates. It helps to preserve the original appearance and physical integrity of polymer systems during outdoor weathering. This product may also be used in conjunction with other light stabilizers of HALS class to give plastics, coatings and paints a superior protection against gloss reduction, cracking, color change, blistering, chalking and delamination. It is only recommended for room temperature and low temperature cured formulations such as air dried alkyd or moisture cured PU based systems.

Applications: GUARD DOG™ UV328 light stabilizer is recommended for applications such as automotive coatings, industrial coatings or for wood stains. It is also recommended as stabilizer for styrene homo and copolymers, acrylic polymers, unsaturated polyesters, PVC, polyolefins, polyurethanes, polyacetals, polyvinylbutyral, elastomers and adhesives.

Recommended dosage: In general, the recommended dosage for plastics is less than 1% whereas in case of paint and coatings is between 1 - 3% depending on substrate and performance requirements in final applications (based on weight % of binder solids in the formulation). The actual dosage required for optimum performance should be investigated by performing trials covering a wide range of concentration by the end user

Performance Benefits:

• Strong and broad UV absorption of UV light in 270-380 nm region with low color contribution

• High degree of inherent light stability and has low volatility.

• Excellent compatibility with polymers and exceptional UV protection for styrene, acrylic, PU, polyole fins, unsaturated polyesters, PVB and engineering polymers