BDO and Its Derivatives, High-Purity Solvents

Polyvinyl-Polypyrrolidone (PVPP)

Polyvinyl-Polypyrrolidone (PVPP), also known as crospovidone or E1202, is a highly cross-linked modification of polyvinylpyrrolidone that exhibits unique physicochemical properties essential for industrial processing. Unlike its linear counterpart, PVPP is entirely insoluble in water, organic solvents, acids, and alkalis due to its complex three-dimensional network structure. Despite this insolubility, the material remains highly hydrophilic, possessing an exceptional capacity to absorb moisture and swell rapidly without forming a gel. This characteristic makes it a premier disintegrant in pharmaceutical formulations and an effective fining agent in the beverage industry. Structurally, PVPP retains the pyrrolidone ring which facilitates the adsorption of polyphenols and heavy metal ions through hydrogen bonding and hydrophobic interactions. Produced via the polymerization of N-vinyl-2-pyrrolidone in the presence of a cross-linking agent, PVPP appears as a white to off-white hygroscopic powder that is chemically inert, non-toxic, and biocompatible, ensuring its broad utility across highly regulated global markets for various applications.

Attributes

Key Features and Benefits

Superior Disintegration: PVPP exhibits rapid swelling behavior upon contact with water, creating high capillary pressure that leads to fast tablet disintegration without gel formation.
High Adsorption Capacity: The porous structure efficiently binds with polyphenols and anthocyanogens, making it ideal for stabilization and clarification of liquid beverages.
Chemical Inertness: Being chemically stable and non-reactive, PVPP does not interact with active pharmaceutical ingredients (APIs), ensuring the long-term stability of medical formulations.
Insoluble Nature: The cross-linked polymer network ensures the material remains completely insoluble in all common solvents, facilitating easy removal through filtration after processing.
Universal Compatibility: It is compatible with a wide range of excipients and processing methods, including direct compression, wet granulation, and roller compaction techniques

Specifications

Technical Highlights

Molecular Structure: Composed of cross-linked 1-vinyl-2-pyrrolidinone polymers, providing a high surface area and specific gravity of approximately 1.22 g/cm³.
Swelling Pressure: Demonstrates a significant swelling pressure ranging from 50 to 150 kPa, which facilitates the rapid physical breakdown of compressed dosage forms.
Particle Size Distribution: Typically available in various grades with mean particle sizes ranging from 20 to 150 micrometers to suit specific application requirements.
Nitrogen Content: Specifications usually require a nitrogen content between 11.0% and 12.8% on a dry basis, confirming the purity of the pyrrolidone units.
Stability Profile: Thermally stable with a high melting point exceeding 300°C and a moisture content specification generally maintained below 5.0% for storage.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Beverage Clarification: Extensively used in the brewing and wine industries to remove haze-forming polyphenols, thereby improving product clarity, flavor stability, and shelf life.
Pharmaceutical Disintegrant: Serves as a high-efficiency superdisintegrant in oral solid dosage forms like tablets and capsules to enhance drug release and bioavailability.
Solubility Enhancement: Utilized in specialized pharmaceutical formulations to increase the dissolution rate of poorly water-soluble drugs through solid dispersion or co-processing techniques.
Industrial Adsorbent: Applied in wastewater treatment and chemical purification processes to selectively adsorb organic contaminants and heavy metal ions from aqueous streams.
Cosmetic Formulations: Acts as a stabilizer and thickening agent in various personal care products, providing texture control and moisture retention in topical applications.