ASTM D2572 – Standard Test Method for Isocyanate Groups in Urethane Materials or Prepolymers
Description:
Significance and Use
4.1 The percent NCO is used to establish unit ratios for stoichiometric reactions with co-reactants.
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.
ASTM D2570