Ultraviolet Absorber UV -328

Ultraviolet Absorber UV -328
Chemical name: 2-(2'-Hydroxy-3', 5'-di-tert-amylphenyl) benzotriazole

        Ultraviolet Absorber UV -328

Introduction: UV-328 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers. UV-328 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.

Empirical Formula:  C22H29N30

CAS NO:  25973-55-1

Physical Properties

Molecular Weight: 351.5

Appearance: slight yellow powder

Melting Range: 80-88 °C

Flashpoint: 229 °C

Specific Gravity (20 °C ): 1.17g/cm3

Applications

1. Unsaturated Polyester: 0.2-0.5wt% based on polymer weight

2.PVC:

Rigid PVC: 0.2-0.5wt% based on polymer weight

Plasticized PVC: 0.1-0.3wt% based on polymer weight

3.Polyurethane: 0.2-1.0wt% based on polymer weight

4.Polyamide: 0.2-0.5wt% based on polymer weight