Abstract: Emulsive plastes were prepared with high NH₄NO₃ aqueous solution as dispersion phase and polyisobutylene succinimide emulsifying agene as continuous phase. The stability of oil membrane of the plastes has been examined in organic dispersing agents and moving water, respectively. The oil membrane was found to be more stable in cyclohexane, paraffin oil and acidic moving water than in alkaline moving water.

Key words: ammonium nitrate, polyisobutylene succinimide, water/oil emulsion, membrane stability