Situation
•Customers using Benzotriazol light stabiliser in powder form
•Need to comply with the European directive for the protection of workers potentially at risk from explosive atmospheres
•ATEX 137 and ATEX 95 norms are relevant for risk assessment of explosion that might cause some types of material in powder form

PolyAd Services Investigation
•Used Benzotriazol has a dust explosion class of ST(3)
•Customer must avoid explosive atmosphere and any ignition source in the work environment
•Equipments like silos, filters in the vent system must be protected by explosion safety valve or high speed shutters

Solution Provided
•Combined other additives of the formulation with Benzotriazol in a non-dusty, feedable blend

Value for Customer
•Through addition of another component the dust explosion class was reduced from ST(1) to ST(3)
•Potential dust explosion risk greatly reduced
•Improved health and safety protection of workers
•Cost saving > 30’000€