Wax emulsion is a stable emulsion composed of paraffin wax and several different kinds of emulsifiers and proper regulators. It is generally used for different raw materials, different raw materials, different emulsifiers, different emulsifying processes, and different quality of applied wax emulsions according to different requirements, but the common characteristic is that the wax emulsion is stable and delicate. No stratification during storage.
Paraffin is a kind of oily organic matter with strong cohesion. Because its molecule is composed of linear saturated hydrocarbons, it is insoluble in water and cannot be saponified. Paraffin emulsification mainly tends to be prepared with non-ionic emulsifier or composite emulsifier.
When paraffin emulsion is used, the dispersing method is often used: the agent is dissolved in water, the emulsifier is dissolved in water directly, and the wax is dissolved in water under the condition of intense stirring. Agent in oil method, that is, the emulsifier is dissolved in wax, and then water is directly added to the mixture, or the mixture is directly added to water, and liquid addition method is adopted in turn, that is, water and wax are added with emulsifier in turn, with only a small amount added each time; Primary soap method, that is, fat is dissolved in wax, alkali is dissolved in water, and soap is formed when two phases contact on the interface; Common emulsifying equipment such as phase inversion temperature emulsification method include colloid mill, homogenizer, high frequency oscillator, ultrasonic emulsifier, etc.
The hydrophilic lipophilic group of emulsifier used for emulsifying paraffin wax should have good compatibility. It has good affinity for oil, disperses paraffin, and has good hydrophilicity. It can be dissolved in water to form a very stable wax emulsion. On the premise of selecting emulsifier, we must also consider the influence of emulsifier dosage, emulsifier addition method, emulsification temperature and time, stirring speed and other factors, among which the most critical is the performance and dosage of emulsifier.
