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Calculation of Isocyanate Concentration (NCO%) and Hydroxyl Value

Author: SYOYAExecutions: 3061
TOP/Shared Formulas (Science)/Chemistry (General)

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Calculate the formulation weight based on the isocyanate concentration (NCO%) and hydroxyl value.
Isocyanate weight = 42/NCO% × (hydroxyl value/56.1 × hydroxyl weight/1000) × mixing ratio
NCO
%
Hydroxyl Equivalent
mg-KOH/g
Hydroxyl Group Weight
g
NCO/OH
Isocyanate weight g

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