Polyvinylpyrrolidone (PVP), cross-linked polyvinylpyrrolidone (PVPP), and copolymerized polyvinylpyrrolidone (VP/VA) VA64 are three polymer excipients with significant differences in structure, properties, and applications. The main differences and applications are as follows:
Comparison of chemical structure and properties
Characteristics:
Polyvinylpyrrolidone (PVP) is N-vinyl-2-pyrrolidone homopolymer, water-soluble, soluble in polar solvents such as alcohols and amines; cross-linked polyvinylpyrrolidone (PVPP) is N-vinyl-2-pyrrolidone cross-linked homopolymer, water-insoluble , almost insoluble in all common solvents; copolymerized polyvinylpyrrolidone (VP/VA) is Copolymer of vinylpyrrolidone and vinyl acetate (typical ratio 3:2), water-soluble, readily soluble in water, ethanol and dichloromethane.
Core functions and typical applications
1.Polyvinylpyrrolidone (PVP)
Binder: Enhances the binding force of particles in wet granulation.
Solubilizer: Forms co-precipitates or micelles with poorly soluble drugs to enhance solubility.
Stabilizer: prevents drug precipitation in injection solutions/eye drops and extends the validity period .
Other applications: hair gel/setting spray film-forming agent.
application2. Cross-linked polyvinylpyretin (PVPP)
Super disintegrant: Rapid water absorption and expansion in tablets/capsules generate disintegration force.
Adsorption clarifier: Adsorb polyphenols and proteins in beer/juice to enhance transparency .
Remove impurities and odors from drugs.
Sustained-release carrier: regulates the drug release rate through crosslinking degree (requires combination with other excipients) .
High-efficiency binder: Improves powder fluidity and reduces brittleness in direct tabulation process . Ethanol is used instead of water as a wetting agent in wet granulation.
Coating film-forming agent: Forms a flexible film layer in film coating to resist cracking.
Solid dispersion carrier: inhibits drug crystallization and accelerates dissolution.
Overall, PVP, PVPP and VA64 are all widely used and highly popular polymers. It plays an important role in fields such as pharma, cosmetics, food, and industry. Unilong is a professional manufacturer of PVP series. If you are interested, please feel free to contact us.
