Polysorbate 20, as a non-ionic surfactant, is made from sorbitol monostearate as the starting material, through ethoxylation reaction and access to about 20 moles of ethylene oxide. It is a yellow transparent liquid with slight odor and slightly bitter taste. Because the HLB value is up to 16.7, it is very suitable for preparing oil in water (O/W) lotion; In terms of solubility, it is well miscible with water, ethanol, and glycerol, but insoluble in mineral oil and vegetable oil. It also has excellent chemical stability in the pH range of 3-10. When properly sealed and stored in a dry and cool place, it is not easily oxidized or deteriorated, and can play a long-term stable role.
Functional Roles in Formulation
Polysorbide ester 20 is widely used in emulsion systems, solubilization systems, and dispersion systems of cosmetics. As an emulsifier, it can form a stable oil in water lotion with uniform particle distribution and maintain viscosity for a long time. When combined with low HLB emulsifiers such as sorbitol monooleate, the effect is particularly good, which can enhance the system's resistance to electrolyte and pH fluctuations. As a solubilizer, it can help the essential oil, essence and active ingredients disperse evenly in the water-based matrix, avoiding layering of cosmetics, spray and other products. Its mild surface activity also makes it suitable for use as a cleaning ingredient in sensitive muscle cleansing formulas.
Performance Benefits
This ingredient has good compatibility with hydrophilic and lipophilic active ingredients, providing formula developers with more flexibility. It can reduce interfacial tension, improve the ductility of the finished product, and promote the absorption of active ingredients. In the cleaning system, it can balance the amount of foam, bringing a mild cleaning effect; In hair care products, it can play an anti-static and dispersing role, improving combing and glossiness. As a cosmetic ingredient, Polysorbide 20 can enhance the stability of formulations under thermal stress and oxidative environments.