what is nco content
The percent NCO is used to establish unit ratios for stoichiometric reactions with co-reactants. 1. Scope. 1.1 This test method covers the determination of the isocyanate group (NCO) content of a urethane intermediate or prepolymer. 1.2 The values stated in SI units are to be regarded as standard.No other units of measurement are included in this standard.. Scope. 1.1 This test method covers the determination of the isocyanate group (NCO) content of a urethane intermediate or prepolymer.