Calculation of the required amount of 600d to cast with a hot cure (mdi based prepolymer)

 

Mass of 600D = Mass of Prepolymer x Equivalent weight of 600D x 0,95
4200
Prepolymer NCO%

For Example:

For a casting of:

  • 500 p.b.m. of Ultracast 60T83 with a NCO% OF 6.40%
  • 95% cure with 600D
  • Equivalent Weight of 600D is 45
Mass of 600D = 500 x 45 x 0,95
4200
6,40
=   21 375
656.25
=   
32,57 p.b.m of 600D/500p.b.m. of 60T83



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