What are the applications of silica in cosmetics?
The chemical inertness and special thixotropy of silicon dioxide have significantly improved the tensile strength, tear resistance and wear resistance of rubber products, and the strength of rubber after improvement has increased by dozens of times. The rheology and thixotropy control of liquid systems, adhesives and polymers are used as anti sedimentation, thickening and anti sagging additives. What are the applications of silica in cosmetics?
1. Silica and nail polish
In nail polish, silica can ensure the uniform distribution of pigment in the brightener, prevent pigmentation, and provide the rheology of the final product, thus improving the coating performance. If the refractive index of the solvent system is the same as that of silica (1). 48), transparent nail polish formula can be formed, such as background color and face color. Otherwise, when the concentration is high, it will be dull, but it will reduce the required gloss. Hydrophilic and hydrophobic silica products can be used in nail polish, and the recommended concentration is between 0.25-4.0%.
2. Silica and lipstick
In lipstick, silica can make the pigment evenly distributed, greatly improve the temperature resistance, and prevent lipstick from softening when the temperature rises. After being smeared on the lips, it can prevent lipstick from transferring to the small lip line, so that lipstick will not fade for a long time. When the concentration is high, the gloss will decline.
3. Silica and eye care
For many eye and facial cosmetics, including honey powder, foundation make-up, rouge, eye black and eyeliner, silica is an efficient anti caking agent and free flowing agent, which can improve the storage stability and dispersibility of powder products. It also enables cosmetics to use pigments, especially in the case of high solid content, which can eventually be used as an efficient processing additive for grinding and filtering powders.