properties fatty esters containing prepolymers based on 1,6-hexamethylene diisocyanate (hdi). solvent-free pu coating curing agent. forms of supply curing agents for flexible coatings and liquid films characterization data characteristics values units test method nco content approx. 11 % m105-iso 11909 viscosity, 23°c approx. 1,350 mpa-s m014-iso 3219/a.3 monomer content < 0.3 % m106-iso 10283 other...