Do you know PVP？

Polyvinyl pyrrolidone , abbreviated as PVP, is a non-ionic polymer compound, which is the most characteristic of N-vinyl amide polymers, and the most deeply and widely researched fine chemicals. PVP has been developed into three categories of nonionic, cationic and anionic, three specifications of industrial grade, pharmaceutical grade and food grade, and a series of homopolymers, copolymers and crosslinked polymers with relative molecular mass ranging from several thousand to more than one million, and has been widely used for its excellent and unique performance.

Physical and chemical properties

Density: 1.144g/cm3

Boiling point: 217.6°C

Melting point: 130°C

Flash point: 93.9°C

Average molecular weight: 8000-700000

Stability: stable at room temperature and pressure.

Solubility: very soluble in water and solvents containing halogenated hydrocarbons, alcohols, amines, nitro alkanes and low molecular fatty acids, insoluble in acetone, ether, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons and a few other solvents. It is compatible with most inorganic acid salts and many kinds of resins.

Properties: hydrophilic and easy to flow white or almost white powder, with a slight odour.

The application of PVP is mainly reflected in the following aspects:

Pharmaceutical field: PVP has good solubility and plasticity, and can be used as a drug carrier for oral preparations, injections, eye drops and topicals. In addition, PVP can be used as a thickener, dispersant and solvent to improve the solubility and bioavailability of drugs, as well as as an oil-control agent to adsorb and reduce the secretion of oil on the surface of the skin, so that the skin stays fresh.

Cosmetics and skin care products: PVP is used as a thickener in the cosmetics industry to improve the viscosity and consistency of products, making them easier to use and apply. PVP is also used as a softener and humectant in skin care products to improve skin moisturisation.

Food additives: As a safe food additive, PVP can improve the taste, texture and stability of food. In food processing, it is mainly used as a clarifier and stabiliser for beer, fruit juice, wine and other foods.

Pigments and coatings: PVP-coated paints and coatings are transparent without affecting the original colour, improving the gloss and dispersion of paints and pigments, improving thermal stability and improving the dispersion of ink and ink.

Petroleum industry: In the petroleum industry, PVP is used as a coagulant reducer and drag reducer, which helps to lower the freezing point of petroleum and reduce the transport resistance.

Polymer surfactant: As a polymer surfactant, polyvinylpyrrolidone can be used as dispersant, emulsifier, thickener, levelling agent, particle size regulator, anti-reprecipitant, coagulant, co-solvent and detergent in different dispersion systems.

In addition, PVP is used as a setting agent, dispersant and affinity agent in personal care products. Due to its non-toxicity and non-irritating or allergic properties to skin and eyes, PVP plays an important role in many fields.

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