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Encyclopedia > Polyvinylpyrrolidone
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PVP (polyvinyl pyrrolidone, povidone, polyvidone) is a water-soluble polymer made from the monomer n-vinyl pyrrolidone: Jump to: navigation, search A polymer is a generic term used to describe a substantially long molecule. ...


image:polyvinylpyrrolidone.png


The monomer is carcinogenic and is extremely toxic to aquatic life. However its polymer PVP in its pure form is so safe that not only is it edible by humans, from about the first half of 20th century it is used as a blood plasma expander for trauma victims. Jump to: navigation, search In chemistry, a monomer (from Greek mono one and meros part) is a small molecule that may become chemically bonded to other monomers to form a polymer. ... In pathology, a carcinogen is any substance or agent that promotes cancer. ... Jump to: navigation, search A polymer is a generic term used to describe a substantially long molecule. ... Blood plasma is the liquid component of blood, in which the blood cells are suspended. ...


PVP is soluble in water and other polar solvents. In water it has the useful property of Newtonian viscosity. When dry it is a light flaky powder, which readily absorbs up to 18% of its weight in atmospheric water. In solution, it has excellent wetting properties and readily forms films. This makes it good as a coating or an additive to coatings. Jump to: navigation, search Water (from the Old English word wæter; c. ... A solvent is a liquid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. ... The pitch drop experiment at the University of Queensland. ...


PVP is a polyelectrolyte. The nitrogen atom can be protonated, forming a quaternary ammonium cation. Polyelectrolytes combine the properties of electrolytes (salts) and polymers (high MW compounds). ... Protonation is the addition of a proton (H+) to an atom, molecule, or ion. ... Categories: Chemistry stubs ...


The uses to which PVP has been put are very wide.


It is used as a binder in many pharmaceutical tablets; being completely inert to humans, it simply passes through. PVP added to tincture of iodine forms a complex; this mixture is known under trade name Betadine. Tincture of iodine is 3% elemental iodine in ethanol base. ... Betadine is a povidone-iodine solution, used as a broad spectrum topical microbicide. ...


PVP binds to polar molecules exceptionally well, owing to its polarity. This has led to its application in coatings for photo-quality ink-jet papers and transparencies, as well as in inks for inkjet printers. A commonly-used example of a polar compound is water (H2O). ... Jump to: navigation, search layers]] that separate organs or subcompartments in organisms. ... Jump to: navigation, search Ink jet printers are the most common type of computer printer; and industry and commerce also use them extensively for special-purpose applications. ...


A very similar polymer - polyvinyl polypyrrolidone (PVPP) - is used to bind impurities to remove them from solutions. Basically, PVPP is a more highly cross-linked version of PVP, which makes it insoluble in water. This means that it can be used to extract impurities by filtration. This polymer is used to filter bitter compounds from drinks and can even be taken as a tablet to absorb compounds causing diarrhoea. (Cf. bone char, charcoal.) Diarrhoea is the correct way to spell the word Diarrhoea. ... Bone char, also known as bone black or animal charcoal, is a granular black material produced by calcinating animal bones: the bones are heated to high temperatures in the absence of air to drive off volatile substances. ... Charcoal is the blackish residue consisting of impure carbon obtained by removing water and other volatile constituents of animal and vegetable substances. ...


PVP is also used in personal care products, such as shampoos and toothpastes, in paints, and adhesives that you have to moisten, such as old-style postage stamps and envelopes. It has also been used in contact lens solutions and in steel-quenching solutions. PVP is the basis of the early formulas for hair sprays and hair gels, and still continues being component of some. Jump to: navigation, search This article needs to be cleaned up to conform to a higher standard of quality. ... Modern toothpaste Toothpaste is a paste used to clean teeth, almost always in conjunction with a toothbrush. ... For information on the U.S. borough, see Paint, Pennsylvania. ... An adhesive is a compound that adheres or bonds two items together. ... Jump to: navigation, search This 1974 stamp from Japan depicts a Class 8620 steam locomotive. ... Jump to: navigation, search An envelope is a packaging product, usually made of flat, planar material such as paper or cardboard, designed to contain a flat object such as a letter. ... A contact lens (also known as a contact) is a corrective, cosmetic, or sometimes protective lens placed on the cornea of the eye. ... Jump to: navigation, search The old steel cable of a colliery winding tower Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. ... You may be looking for Hairspray (musical), Hairspray (movie). ... Hair gel is a kind of gel that is put in hair to stiffen it into a particular hairstyle. ...


As a food additive, PVP is a stabilizer and has E number E1201. PVPP is E1202. Jump to: navigation, search It has been suggested that Colorings be merged into this article or section. ... The tail of a Lufthansa airliner (Airbus A319) in flight, showing the horizontal and vertical stabilizer Mathematics: see Group action. ... For the mathematical constant see: E (mathematical constant). ...


  Results from FactBites:
 
EPA: Federal Register: Polyvinylpyrrolidone Butylated Polymer; Tolerance Exemption (1642 words)
Polyvinylpyrrolidone, butylated polymer conforms to the definition of polymer given in 40 CFR 723(b) and meets the following criteria that are used to identify low risk polymers: 1.
Polyvinylpyrrolidone, butylated polymer is not a cationic polymer, nor is it reasonably anticipated to become a cationic polymer in a natural aquatic environment.
Polyvinylpyrrolidone, butylated polymer is not manufactured or imported from monomers and /or other reactants that are not already included on the TSCA Chemical Substance Inventory or manufactured under an applicable TSCA section 5 exemption.
Preparation of a polyvinylpyrrolidone by heat treatment of an aqueous solution of a conventional polyvinylpyrrolidone - ... (1783 words)
A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.
Polyvinylpyrrolidone which is characterized by a viscosity of from 1,000 to 2,000 mPa.S at room temperature when admixed in water at a concentration of 2 percent by weight; said polyvinylpyrrolidone obtained by a process comprising:
Specifically, in the novel process for the preparation of polyvinylpyrrolidone which has high viscosities in aqueous solution, a 5-30% strength by weight aqueous solution of a polyvinylpyrrolidone obtained by free radical polymerization in a conventional manner, is heated at from 20.degree.
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