Abstract:

A type of agitation-resistant emulsified wax was prepared where the 58# semi-refined wax was used as raw material and the mixture of glycerin monostearate, peregal O-20 and PEG-100 stearate was used as the main emulsifier. The results showed that the optimized conditions for preparing the paraffin emulsion were as follows: The HLB value of the composite emulsifier was 10.8; the amount of the emulsifier was 15% of paraffin wax; the emulsifying temperature was 80 ℃; the emulsifying time was 30 min. The viscosity of the emulsified wax thus obtained was 14.7 s （No.4 viscosity flow cup）; the particle size was less than 50 nm; Zeta potential was 180 mV; the solid content was 43.7%. Rheological properties showed that the emulsion was pseudoplastic fluid. When the emulsion was stirred at 1 500 r/min for 4 h, the emulsion exhibited a viscosity of 12.4 s （i.e., the viscosity was not increased）, a solid content of 41.2%, good static and centrifugal stabilities, no phase separation, and a dispersibility of grade one, and its good fluidity was maintained not less than 7 days.

Key words: emulsified wax, glyceryl monostearate, rheological property, particle size, Zeta potential