反应详情

190.8 g of Rucoflex XS-5570-55, 102.9 g of Rucoflex S-1011-55 and 6.7 g of DMPA are reacted with 73.2 g of TMXDI in the presence of the T-12 at 85° C. for 4 hours to prepare a prepolymer. 3.4 g of sodium hydroxide and 1.83 g of EA are dissolved in 660 g of water, and then the prepolymer is dispersed by adding the aqueous solution containing NaOH and EA. After 5 minutes, a solution of 4.08 g of DETA in 51 g of water is added and stirring is continued for 15 minutes to form the aqueous poly(urethane/urea) dispersion. A finely divided dispersion having a solids content of 34.9% and a pH of 7.95 is obtained.

1. customto prepare a prepolymer
2. additionthe prepolymer is dispersed
3. additionby adding the aqueous solution
4. waitis continued for 15 minutes