Polyvinyl Pyrrolidone/USP Grade Pvp K30 K90 K12 K15 K17 K25 K60/Polyvinylpyrrolidone CAS No 9003-39-8
Polyvinylpyrrolidone, abbreviated as PVP, is a non-ionic polymer compound. It is the most characteristic of N-vinylamide polymers and the most extensively studied fine chemical. Has developed into three categories of non-ionic, cationic, anionic, industrial grade, pharmaceutical grade, food grade 3 specifications, relative molecular weight from thousands to more than one million homopolymer, copolymer and cross-linked polymer series products , And has been widely used with its excellent and unique properties.
PVP is divided into four levels according to its average molecular weight. It is usually expressed by K value, and different K values represent the corresponding PVP average molecular weight range. The K value is actually a characteristic value related to the relative viscosity of the PVP aqueous solution, and the viscosity is a physical quantity related to the molecular weight of the polymer, so the K value can be used to characterize the average molecular weight of PVP. Generally, the greater the K value, the greater the viscosity and the stronger the adhesion.
Boiling point: 217.6°C
Melting point: 130°C
Flash point: 93.9°C
Average molecular weight: 8000-700000
Stability: stable under normal temperature and pressure
Solubility: very soluble in water and solvents containing halogenated hydrocarbons, alcohols, amines, nitroalkanes and low molecular fatty acids, etc., insoluble in a few solvents such as acetone, ether, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons. Compatible with most inorganic acid salts and various resins.
Properties: It is a hydrophilic, easy-flowing white or almost white powder with a slight odor.
1.Polyvinylpyrrolidone PVP is one of the three new pharmaceutical excipients. It can be used as a cosolvent for tablets, granules, injections, glidants for capsules, dispersants for liquid preparations and colorants, enzymes and heat-sensitive drugs. Stabilizer, co-precipitating agent for poorly soluble drugs, detoxifier and lubricant for eye drops, etc.
2.Industrially used as foaming polystyrene additives, gelling agents, stabilizers, fiber treatment agents, paper processing aids, adhesives, and thickeners for suspension polymerization.
3.Polyvinylpyrrolidone PVP and its copolymer CAP are important raw materials for cosmetics. They are mainly used as hair-retaining agents. The film formed on the hair is elastic and shiny, has excellent combing performance, does not stick to dust, and uses different specifications of resins to meet Various relative humidity and climatic conditions, so it is an indispensable raw material for styling hair cream, hair spray and mousse. It can also be used as a skin care moisturizer in cosmetics, a grease base material, a hair dye dispersant, and a foam stabilizer to improve the consistency of shampoos.
4.Coatings and pigments
Paints and coatings coated with PVP form a transparent film without affecting the natural color, improve the gloss and dispersibility of paints and pigments, improve thermal stability and improve the dispersibility of inks and inks.
PVP has a good affinity with many organic dyes. It can be combined with hydrophobic synthetic fibers such as polyacrylonitrile, ester, nylon and fibrous materials to improve dyeing power and hydrophilicity. Kirsh Y E et al. reported that after the graft copolymerization of PVP and nylon, the fabric produced has improved wet wrinkle resistance and moisture resistance.
Polyvinylpyrrolidone as a polymer surfactant, in different dispersion systems, can be used as a dispersant, emulsifier, thickener, leveling agent, particle size regulator, anti-reprecipitation agent, coagulant, co-solvent and washing agent Agent.
As an active agent to stabilize colloidal particles, it is used in the preparation process of core-shell catalysts.
Packing: 1kg/aluminum foil bag, 25kg/cardboard drum,also can be packed according to customer requirements
Storage method: sealed and stored in a dry and cool place away from light
Shelf life: 2 years
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