Isocyanates (NCO) in unsaturated polyester resin and polyurethane resin according to EN ISO 14896 

The isocyanate content in resins is given in g of isocyanate per 100 g of sample. In this Application Note, the determination of the isocyanates in unsaturated polyester resin (UPR) and polyurethane resin (PUR) by automated, potentiometric titration according to EN ISO 14896 using hydrochloric acid as titrant is described.