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How dimethicones are used in makeup applications.
Time：
2024-08-28
Silicone materials used in cosmetics, in addition to a variety of silicone oil, cyclosiloxane, silicone rubber raw rubber, silicone resin, most of the silicone oil emulsion, silicone oil dispersion, volatile silicone oil solution, gelation agent, silicone oil protective film-forming agent and other dosage forms used.
1. Silicone oil emulsion for cosmetics
In order to meet the requirements of a variety of cosmetics, so far has developed oil-in-water silicone oil microemulsions, silicone oil emulsions with large particle size, silicone oil emulsions with narrow particle size distribution, silicone oil emulsions with multilayer structure of the oil phase, silicone oil emulsions with nucleus-shell structure of the oil phase, silicone oil emulsions with high viscosity (more than 100,000mm2/s) and ultra-high viscosity (more than 1 × 107mm2/s) and high concentration of silicone oil emulsions. The method of production of these emulsions is also very diverse.
These emulsions are also a variety of methods, but basically can be divided into two categories of mechanical emulsification method and emulsion polymerization method.
2. Mechanical emulsification method to formulate silicone oil emulsion
Usually, silicone oil emulsions according to the phase type is divided into oil-in-water (O/W) and water-in-oil (W/O) two categories, the former water as a continuous phase, silicone oil for the dispersed phase; the latter silicone oil for the continuous phase, water for the dispersed phase. Cosmetics with silicone oil emulsion in addition to a few for the W / O type, most of the O / W type.
O / W-type emulsion is characterized by less greasy, smooth feeling, can be attached to the silicone oil in the hair or skin, W / O-type emulsion is characterized by a good wash effect.
3. oil raw materials are more varied, the more classic is petroleum jelly, is recognized as one of the best oil to prevent moisture loss effect. However, petroleum jelly is less breathable and when too much is applied, the skin feels like it is being "stuck". In modern skin care products, jojoba oil and other mild oils are added to reduce skin irritation, and silicone oil with good breathability is added to improve the feeling of use. 4.
4. The main role of the surfactant is to make the silicone oil oil and water together to form a more stable system, so that the silicone oil oil in the form of small oil beads (diameter of about 1-10 microns) dispersed in water to form a stable cream or emulsion.
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