反应详情

143.1 g of Rucoflex XS-5570-55, 154 g of Rucoflex S-1011-55 and 6.7 g of DMPA are reacted with 44.4 g of IPDI and 16.8 g of HDI at 80° C. for 3 hours to prepare a prepolymer. The prepolymer is then dispersed in a solution of 2.5 g of NaOH and 1.83 g of EA in 600.0 g of water. After 5 minutes, a solution of 1.8 g of EDA and 2.04 g of DETA in 50.0 g of water is added to form a poly(urethane/urea) dispersion. A finely divided dispersion having solids content of 36.5% and a pH of 7.5 is obtained.

1. customto prepare a prepolymer