Polyvinylpyrrolidone acts as a moisturizing agent for the skin.
Polyethylpyrrolidone (PVP for short) is a non-ionic polymer compound, which has good affinity to the skin and can form a non-occlusive film on the skin surface, thus playing the role of moisturizing and moisturizing. If PVP is added to the mask, it can reduce the greasy feeling, and has a good soft and smooth feeling, which can speed up the penetration of the mask ingredients and extend the retention time of the ingredients.
Polyvinylpyrrolidone knowledge expansion
Polyvinylpyrrolidone is the most distinctive and widely studied fine chemical among n-vinylamide polymers. Has developed into non-ionic, cationic, anion 3 categories, industrial grade, pharmaceutical grade, food grade 3 specifications, relative molecular mass from thousands to more than one million homopolymer, copolymer and crosslinked polymer series products, and with its excellent unique properties have been widely used.
PVP is divided into four stages according to its average molecular weight size, which is usually expressed by the K value, and different K values represent the corresponding average molecular weight range of PVP. The K value is actually an eigenvalue related to the relative viscosity of PVP aqueous solution, and the viscosity is a physical quantity related to the molecular weight of polymers, so the average molecular weight of PVP can be characterized by K value. Generally, the greater the K value, the greater the viscosity and the stronger the adhesion.
As a synthetic water-soluble polymer compound, PVP has the general properties of water-soluble polymer compounds, colloidal protection, film formation, adhesion, hygroscopic, solubilization or condensation, but its most distinctive, so people pay attention to its excellent solubility and physiological compatibility.
In synthetic polymers such as PVP both soluble in water, but also soluble in most organic solvents, very low toxicity, good physiological compatibility is rare, especially in medicine, food, cosmetics, which are closely related to people’s health in the field, with the reduction of the price of its raw material butyrolactone, will show its good prospects for development.
