BLS® 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability for plastics and other organic polymers. Due to its highly effective broad UV absorption properties and excellent polymer compatibility, BLS® 531 offers maximum polymer protection and low color contribution, retards yellowing and loss of physical properties.

Applications: BLS® 531 is an extremely effective UV absorber that is recommended for polypropylene, polyethylene, plasticized PVC, rubber, acrylics, polycarbonate, EVA, and polyester. BLS® 531 is also recommended for use in adhesives and sealants where light stability is a concern. When BLS® 531 is synergistically combined with a Hindered Amine Light Stabilizer (HALS) it is extremely effective in low density and linear low density polyethylene as well as ethylene-vinyl acetate copolymers for agricultural films. This synergistic combination can also be used in high density polyethylene molded articles (i.e. crates). BLS® 531 can also be used synergistically with antioxidants, phosphites, and light stabilizers.

Advantages:

• Highly compatible with a wide range of organic substrates

• Non-staining and low color contribution

• Particularly suitable for thick films, typically > 100 um and thick sections

• Low vapor pressure prevents losses during processing

• Low migration rates reduce danger of blooming

• Improvement of long-term stability

• Low volatility

• Ease of compatibility with other stabilizers