Hydrophilic Silicone Oil is an Important Ingredient in Skin Care Products

Hydrophilic silicone oil emulsions for cosmetics can be obtained by three emulsion polymerization methods: ring-opening polymerization, polycondensation and addition polymerization.

1. Ring-opening polymerization method of hydrophilic silicone oil emulsion

Use a dimethylcyclosiloxane such as octamethylcyclotetrasiloxane (D4) as the starting material for the equilibrium reaction; it typically contains 5% to 10% cyclic siloxane oligomers.

During storage and use, cyclic siloxane oligomers are easy to volatilize from the emulsion, affecting the stability of the emulsion; hair cosmetics prepared from it use relatively concentrated places such as heated wind to treat hair, and volatile cyclic silicone Alkylene oxide oligomers cause environmental pollution and cause contact failures in surrounding electrical installations. However, this method has the advantage of being easy to use and is well suited for some skin cosmetics.

2. Polycondensation method of hydrophilic silicone oil emulsion

Use low viscosity, dihydroxy polydimethylsiloxane as raw material. The most distinctive feature is that the product does not contain cyclic siloxane oligomers, and can obtain high-yield and stable hydrophilic silicone oil emulsions.

3. Addition polymerization method of hydrophilic silicone oil emulsion

Polydimethylsiloxane with low molar mass end capped with vinyl and active hydrogen terminated polydimethylsiloxane with low molar mass are used as raw materials, non-public products do not contain cyclic siloxane oligomers, and the particle size dispersed in the emulsion can be controlled as a hydrophilic silicone oil emulsion.

The size of the polysiloxane chain rings produced by the addition reaction of the particles contains siloxane bonds and silalkylene bonds, making it possible to contact, expand and use its unique advantages in skin cosmetics formulated with emulsions; and The emulsion does not contain ionic surfactants. Hydrophilic silicone oil is a key ingredient of cosmetics and is used to improve the safety of cosmetics.

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