Emollients selection tips and procedures
Emollients selection tips
1. Emollients will effectively select the appropriate type of emollients according to their performance requirements. The structure of an ester not only affects the skin feel left by the emollients, but also affects the spreading properties of the emollients on the skin. Since the branching helps to promote fluidity, the emollients in such a structure generally have a high spreading ability, and as the relative molecular mass of the emollients increases, the spreadability decreases, and the drop is usually remarkable. In addition, consideration should be given to occlusion, lubrication, dispersion, suspension, dissolution, compatibility with other groups of products, and effects on product appearance.
2. The role of wetting and dispersing of pigments in emollients. During the operation, emollients are commonly used in pigmented cosmetic products. The pigments used include inorganic pigments and organic lakes. In cosmetic products, the problem of stability of the emulsion may be caused by insufficient dispersion. The use of emollient esters promotes effective wetting and dispersion of the pigment. Since the aqueous phase is almost evaporated after the product is applied, the oil phase becomes the actual carrier for pigment lubrication and dispersion, so that the wetting ability of the emollient in the O/W emulsion relative to the pigment is also a key consideration.
3. Oxidative stability of emollients, some natural oils and emollients will contain unsaturated doubles during handling
The bond is easily oxidized and rancid. Among them, the macadamia nut oil has the highest oxidation stability, followed by jojoba ester, wheat germ oil and sunflower oil.www.china-zhufengchem.com