Polyvinyl pyrrolidone (PVP)
Povidone K15 / K17 / K25 / K30 / K60 / K85 / K90
CAS number: 9003-39-8
Molecular formula: CH4
Molecular weight: 16.04246
EINECS number: 1312995-182-4
Appearance: Hydrophilic, easy-flowing white or nearly white powder, slightly odorous.
PVP is widely used as an adjuvant for pharmaceutical preparations, the specific applications are as follows: ① used as a binder for the preparation ② co-precipitating agent ③ as a co-solvent or crystallization prevention agent in the injection ④ coating or film forming agent ⑤ retarder 1. The controlled release of sustained-release drug can prolong the action time of the drug ⑥ artificial vitreous and cornea ⑦ surgical bandage ⑧ PVP iodine disinfectant. In addition, PVP can also be used as a coloring agent and X-ray contrast agent; it can be used in tablets, granules, liquids and other dosage forms of drugs, with detoxification, hemostasis, increase the concentration of dissolution, prevent peritoneal adhesions, promote blood sedimentation and other effects.
In food processing, it is mainly used as a food clarifier and stabilizer for beer, juice, wine, etc.
In daily cosmetics, PVP and copolymers have good dispersibility and film-forming properties. PVP has a protective colloid role in emulsions. It can be used in fatty and non-fatty pastes, as a styling liquid, hairspray and friction. Silk styling agent, hair conditioner sunscreen agent, shampoo foam stabilizer, wave styling agent and dispersant and affinity agent in hair dye. Adding PVP to cream, sunscreen, and depilatory agent can enhance the moisturizing and lubricating effect.
Paints and coatings coated with PVP are transparent and do not affect the original color, improve the gloss and dispersion of paints and pigments, improve thermal stability and improve the dispersion of inks and inks.
Polyvinylpyrrolidone as a polymer surfactant, in different dispersion systems, can be used as a dispersant, emulsifier, thickener, leveling agent, particle size regulator, anti-redeposition agent, coagulant, co-solvent and washing Agent.