Silicone oil is called polysiloxane and belongs to high molecular polymer. Silicone oil began to be used in cosmetics in 1950, and it developed rapidly in cosmetics after 1970. Silicone-containing cosmetics have the following characteristics: good lubricity, a uniform water-repellent protective film on the skin, no greasy and sticky feeling, good gloss; good anti-ultraviolet radiation properties, in ultraviolet light It will not cause oxidative deterioration and cause skin irritation; good antistatic performance and dustproof effect; good air permeability, does not affect sweat discharge after film formation; good stability and chemical inertness and matching performance.


Silica
Many people mentioned that silica will think of stones. How can stones be used in cosmetics? In fact, in cosmetics, we often contact fumed silica with small particle size and uniform particle size distribution. This nano-scale silica has high activity and wide application. In recent years, with the increasing awareness of fumed silica, it has been increasingly used in personal care products such as skin care products, sunscreens, make-up, antiperspirants, hair care products, shower gels, and facial cleansers. In particular, it better solves the problem of suspension of solid particles in the formulation, and gives the system more excellent characteristics, making it one of the essential raw materials in high-grade skin care products, liquid foundation, mascara and lip gloss.


Specifically, in makeup and eye care, including dense powder, foundation, rouge, eye shadow, eyebrow line and eyeliner, fumed silica is a highly effective anti-caking agent and fluxing agent, which can improve storage stability and powderiness. Product dispersion. In emulsions, silica is particularly suitable for increasing the viscosity of the emulsion, increasing the water resistance of the cream and lotion, and reducing the amount of surfactant. In sunscreen products, silica improves storage stability and also improves the water repellency of the formulation. It also allows the sunscreen in the formulation to be more evenly distributed to increase the sun protection index.


In addition, silica, as a natural mineral, is added to many nutritional supplements such as protein powders and capsules. Its anti-caking effect is to separate the individual powders by wrapping the food particles to keep the food in optimal free flow. At the same time, the silica wrapped around the food particles can effectively absorb the surrounding humid air to prevent moisture from agglomerating during storage. Certainly the little fairies will ask: Is the silicon dioxide in the food harmful to the human body? In fact, silica is an officially recognized food additive ("GB 2760-2014 Food Additive Use Standard"). When used as an anti-caking agent, the amount of silica is very small, so there is no need to worry about side effects.