Polyvinylpyrrolidone (PVP) is cross-linkable to a water insoluble, swellable material either in the course of vinylpyrrolidone polymerization, by addition of an appropriate multifunctional comonomer, or by post-reaction; typically through hydrogen abstraction chemistry. Polyvinylpyrrolidone is a commonly used inactive ingredient in the preparation of pharmaceutical products. It serves as a dry and damp binding substance in the production of granules and tablets, as well as a thickening agent and solutizer. Cross-linked PVP is also used as a highly active explosive agent and as an accelerating agent for disintegration of solid medications.
Polyvinylpyrrolidone is a white hygroscopic powder with a weak characteristic odor. In contrast with most polymers it is readily soluble both in water as well as in a large number of organic solvents such as alcohols, amines, acids, chlorinated hydrocarbons, amides and lactams.
Povidone is the generic name for polyvinylpyrrolidone (PVP) in pharmaceutical grade. It is the soluble homopolymer of N-vinyl-2-pyrrolidone. As a food and pharmaceutical product additive it appears as the form identified as K-30. Polyvinylpyrrolidone (PVP) can be plasticized with water and most common organic plasticizers.
Polyvinylpyrrolidone is a hygroscopic, amorphous polymer supplied as a white, free-flowing powder, or in clear aqueous solution. Available in several molecular weight grades, each characterized by K-value, it is used in applications such as:
- Dye transfer inhibition in detergents using K-15 and K-30 to complex fugitive dyes in wash water
- Textile dye stripping and strike rate control through complexation and dispersion with K-30
- Photoprocessing where sulfide salts are complexed by K-30 in developing baths to inhibit redeposition on film
- Laundry detergents where K-30 inhibits soil redeposition
- Emulsion polymerization where K-30 latex stabilizer, functioning as a protective colloid, facilitates redispersion of a "broken" latex in end-use application
- Dispersions using K-30 and K-90 for nonaqueous dye and pigment based writing ink delivery systems
- Production of expandable polystyrene, with K-90 used as the protective colloid
- Polyvinylpyrrolidone and a number of its copolymers find use as media components in digital ink jet-printing
- Hollow fiber membrane manufacture in which K-90 creates voids and hydrophilic domains in polysulfone coatings
- In oil field cementing, where K-30 and K-90 serve as fluid loss control agents
- On lithographic plates using hydrophobic inks, where K-15 provides enhancement of the nonimage area
- K-90 in stearate-based adhesive sticks for arts and crafts applications
- Both ends of toilet paper rolls, utilizing K-60 as an adhesive
- In fiber glass coating, using K-60 to promote polyvinylacetate adhesion
- As combustible ceramic binders, using K-30 and K-90 to enhance green strength
- In tablet binder formulations, where K-30 and K-90 are used for industrial and pharmceutical applications
- In CRT fabrication using negative photoresist technology, where K-90 is used with a chemical crosslinker in water-based coating systems
- Production of electrolead hydrogels, where K-90 is crosslinked by E-beam irradiation to produce a conducting medium
- In kinetic inhibition of gas hydrate formation as cost effective alternatives to methanol and ethylene glycol
- As metal quenchant bath thickeners where K-90 and K-120 are used
CAS No: 9003-39-8
Molecular Formula: (C6H9NO)X
Packing: 25kg cardboard drum with polyethylene lining, Solution, in bulk tank-wagons or IBC container.