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(3). % Free NCO (% Available NCO)
f x MW of NCO x 100 % NCO = ------------------ MW of Diisocyanate
¿¹) MDI ºÐÀÚ·® : 250, f : 2
2 x 42 x 100 MDI ÀÇ % NCO = ----------- = 33.6% 250
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