The kinetics of spontaneous reaction of 4,4'-diphenyl methane diisocyanate (MDI), and toluene diisocyanate(TDI) with polyoxypropylene glycol(PPG), polytetramethylene ether glycol(PTMG), and glycol propylene(GP) were studied, and the data were treated by a method developed by Baker and Sate. The rate constants, K and K' of aromatic diisocyanate with polyether diol were determined. The reaction of MDI-PTMG system apparently followed second and third order kinetics in good agreement. The reactions of TDI-PTMG system followed these kinetics experimentally but did not follow theoretically. The difference of E'₄-E'₃ of TDI-PTMG was smaller about 5 times than E'₂-E'₁ values of MDI-PTMG system.

Polyoxypropylene glycol(PPG), polytetramethylene ether glycol(PTMG), glycolpropylene(GP)과 4,4'-diphenyl methane diisocyanate(MDI), toluene diisocyanate(TDI)의 동시반응 속도론을 연구하였으며, 자료는 Baker와 Sato의 방법에 따라 분석하였다. Polyether diol과 방향족 diisocyanate의 속도상수 K와 K'를 측정하였다. MDI-PTMG계는 2차 및 3차 반응 속도식에 뚜렷하게 일치하였다. TDI-PTMG계의 실험자료는 2차 속도식에 일치하였으나, 이론접근식에는 잘 맞지 않았다. TDI-PTMG계의 E'₄-E'₃ 값은 MDI-PTMGE계의 E'₂-E'₁ 값보다 5배 낮았다.

Keywords: Polyether-diol; Aromatic diisocyanate; Prepolymer; Kinetics