The Polyurethane prepolymers were prepared from IPDI (isophorone diisocyanate), poly(ethylene-adipate) glycol and DMPA (dimethylol propionic acid). This prepolymers were dispersed in the aqueous phase by neutralization emulsification. The polyurethane dispersions were electrostatically stabilized with carboxyl group incorporated into their particles, which were neutralized by TEA (triethylamine). The reaction parameters were molecular weight of polyol, amount of chain elongation agent, TEA/DMPA mole ratio, and dielectric constant. Due to the enlargement of stabilization site, the particle size decreased with increasing the concentration of carboxyl group and degree of neutralization.
|Number of pages||8|
|Publication status||Published - 1997 Dec 1|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Polymers and Plastics
- Materials Chemistry