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Description
Application and formulation
- Optimal proportion of oil phase in emulsions: 30 – 40%
- Acid and electrolyte additives can destabilize the emulsion – they need to be dosed carefully
- For additional emulsion stability, it is recommended to add:
- 3 – 5% glycerin
- 0.5% magnesium sulfate (heptahydrate) in the aqueous phase
- Consistency stabilization: addition of hydrogenated castor oil, beeswax or high melting point waxes may be necessary
- Esters of natural fatty acids may be used, but must not constitute more than half of the oil phase.
Preparation process
- Precise formulation tuning – phase ratio and oil phase viscosity are key to stability
- Gradual addition of the aqueous phase – added to the oil phase with intensive mixing
- Emulsion homogenization – the initial pre-emulsion is homogenized to achieve a stable dispersion
- Final homogenization below 30°C – ensures proper recrystallization of waxes and long-term stability
Recommended emulsifying equipment
- High-speed laboratory and industrial mixers
- Planetary mixers and rotor-stator homogenizers for uniform mixing
- Heat and homogenize before use.
