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Topic: Polyvinylpyrrolidone

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	EPA: Federal Register: Polyvinylpyrrolidone Butylated Polymer; Tolerance Exemption
		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.
	www.epa.gov /fedrgstr/EPA-PEST/1996/July/Day-10/pr-789.html (1642 words)

	Preparation of a polyvinylpyrrolidone by heat treatment of an aqueous solution of a conventional polyvinylpyrrolidone - ...
		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.
	www.freepatentsonline.com /4433112.html (1783 words)

	Polyvinylpyrrolidone iodine PVP-I PVP K-30 90
		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 white hygroscopic powder with a weak characteristic odor.
		Polyvinylpyrrolidone is a hygroscopic, amorphous polymer supplied as a white, free-flowing powder, or in clear aqueous solution.
	www.greatvistachemicals.com /industrial_and_specialty_chemicals/polyvinylpyrrolidone.html (542 words)

	Stabilized polyvinylpyrrolidone formulation - Patent 6592900
		Preparations in powder form comprising or consisting of soluble or insoluble polyvinylpyrrolidone and/or polyvinylpyrrolidone copolymers and suitable as aid for pharmaceutical formulations comprise in homogeneous dispersion very small amounts of heavy metals which are physiologically tolerated in these amounts, or very small amounts of peroxide-cleaving enzymes.
		Polymers such as homopolymeric, soluble or insoluble polyvinylpyrrolidone ("povidone" or "crospovidone") and the vinylpyrrolidone/vinyl acetate copolymer ("copovidone") are converted after their polymerization into a free-flowing powder by spray drying, drum drying or another hot air drying.
		The chemical and physical properties of the soluble (a) polyvinylpyrrolidones (povidone), insoluble (b) polyvinylpyrrolidone (crospovidone) and (c) polyvinylpyrrolidone copolymers, which are, for example, vinylpyrrolidone/vinyl acetate copolymers (copovidone), which are to be used according to the invention as aids, are also described in detail in the literature.
	www.freepatentsonline.com /6592900.html (2143 words)

	493. Polyvinylpyrrolidone (PVP) (WHO Food Additives Series 15) (Site not responding. Last check: 2007-11-01)
		POLYVINYLPYRROLIDONE (PVP) Explanation This substance was evaluated for acceptable daily intake for man (ADI) by the Joint FAO/WHO Expert Committee on Food Additives in 1966 and 1973 (see Annex I, Refs.
		Polyvinylpyrrolidone was detected in biopsy material (La Chapelle, 1966).
		EVALUATION Establishment of an ADI is deferred pending a review and evaluation of existing or new data relating to pharmacokinetics and RES storage.
	www.inchem.org /documents/jecfa/jecmono/v15je08.htm (3948 words)

	Patent 6,129,931
		A pH-dependent, controlled-release, drug delivery composition is described herein which includes: (a) a complex between poly(maleic diacid-alkyl vinyl ether) and polyvinylpyrrolidone, or their equivalents, and (b) an effective amount of a pharmaceutical medicament.
		The inventive component of such compositions is a hydrogen-bonded complex between for example, the copolymer of maleic acid (MA) and an alkyl vinyl ether (AVE) and plasdone (polyvinylpyrrolidone (PVP)).
		Suitably, the compositions herein are formulated into an oral dosage form, such as a tablet, by direct compression, high shear or fluid-bed, wet granulation of its components.
	www.pharmcast.com /Patents/October2000/101000OG/6129931_Tablet101000.htm (1200 words)

	Effect of Carbopol and Polyvinylpyrrolidone on the Mechanical, Rheological, and Release Properties of Bioadhesive ...
		Polymers such as Carbopol, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, carboxymethyl cellulose, polyvinylpyrrolidone, and their combinations were evaluated for their mucoadhesive strength and bioadhesive potential.
		On the other hand, polyethylene glycol is commonly used as a base for cream, gel, and ointment preparations because of its physical characteristics and the versatile consistencies that can be obtained by mixing different proportions of its liquid and waxy forms.
		The relationship between mechanical and rheological properties and drug release was measured, and the effects of the concentrations of Carbopol 934P and polyvinylpyrrolidone K-90 on the various parameters were expressed using response surface and contour plots.
	www.aapspharmscitech.org /view.asp?art=pt010324&pdf=yes (3281 words)

	U.S. Patent: 5002763 - Water soluble complexes of polyvinylpyrrolidone, hydrogen chloride and iodine and process for ...
		A water soluble complex of polyvinylpyrrolidone, hydrogen chloride and iodine, and a process for making the same, is provided herein.
		This invention relates to complexed iodine products, and, more particularly, to water soluble complexes of polyvinylpyrrolidone, hydrogen chloride and iodine, and to a process for preparing such water soluble complexes as a stable, free-flowing powder having substantially all of its complexed iodine available for antibacterial activity.
		A water soluble complex of polyvinylpyrrolidone, hydrogen chloride and iodine is provided herein.
	www.everypatent.com /comp/pat5002763.html (2768 words)

	Patent 6,024,976
		According to the invention, soluble polyvinylpyrrolidone can be used to prevent crystallization of the drug, without affecting the rate of drug delivery from the pressure-sensitive adhesive composition.
		In accordance with one aspect of the invention, an improved pressure-sensitive adhesive composition of the type which is suitable as a matrix for controlled release of a drug therefrom comprises a blend of a rubber-based pressure-sensitive adhesive and a soluble polyvinylpyrrolidone (PVP).
		The term "polyvinylpyrrolidone," or "PVP" refers to a polymer, either a homopolymer or copolymer, containing N-vinylpyrrolidone as the monomeric unit.
	www.pharmcast.com /Patents/021500OG/6024976_solubility021500.htm (880 words)

	CIPO - Canadian Patent Database - Claims - 2114014 (Site not responding. Last check: 2007-11-01)
		A pharmaceutical composition as in Claim 28, wherein said polyvinylpyrrolidone has a number average molecular weight of at least 100,000.
		A method as in Claim 32, wherein said amphiphilic polymer is high number average molecular weight polyvinylpyrrolidone, having a number average molecular weight of at least 100,000.
		The composition of Claim 34 wherein said polyvinylpyrrolidone has a number average molecular weight of at least 100,000.
	patents1.ic.gc.ca /claims?patent_number=2114014&language=EN (1040 words)

	New Value-Added Polymeric Dispersants and Uses Thereof in Agricultural Formulations
		Further, a combination of Polyvinylpyrrolidone and polymeric dispersants showed built-in rainfastness in suspension concentrates.
		Examples of prototype formulations and a working model explaining the synergistic role of polyvinylpyrrolidone are provided.
		Solid composites from Polyvinylpyrrolidone and MVE-MAHE were prepared via spray drying the liquid slurries.
	www.astm.org /JOURNALS/JAI/PAGES/548.htm (490 words)

	Jarchem Industries Inc.
		These widely used polymers can be used for a variety of applications including: pharmaceuticals, personal care, cosmetics, beverages, adhesives, synthetic resins, fiber dyes, detergents, dye products, paint and inks, electronic materials, biological engineering material and others.
		The largest polyvinylpyrrolidone product line is the PVP-K Homopolymer Series (ranging from K12 - K90), used primarily as film-forming agents and viscosity enhancers in personal care products and as excipients in pharmaceutical products.
		They are key components in hair and skincare products, cosmetics, deodorants, sunscreens and dental care products.
	www.jarchem.com /PR-PVP.htm (275 words)

	BASF Product Inceases for Chemicals
		Effective January 1, 2006, or as allowed by contract, BASF will increase its selling prices in the United States by $0.02 per pound on all technical grade sulfite products and on all grades of sodium nitrite and sodium nitrate, and by $0.04 per pound on all food and photo grade sulfite products.
		Effective January 1, 2006, or as contracts allow, BASF will raise prices by 10 percent in the United States, Canada and Mexico on all Luvitec(R) and Luvicross(R) polyvinylpyrrolidone products supplied to specialty markets for technical applications.
		Highly versatile materials, BASF’s polyvinylpyrrolidone products may be used to produce ceramics, emulsions, plastics, photographic films, glass fibers, and to formulate adhesives, coatings, paper coatings, pesticides, metal bath quenching liquids, inks, and more.
	www.jobwerx.com /news/basf_biz-id=947763_153.html (210 words)

	Inhibition of Protein Adsorption onto Silica by Polyvinylpyrrolidone (Site not responding. Last check: 2007-11-01)
		Isotherms for the adsorption of poly(vinylpyrrolidone) (PVP) and bovine serum albumin (BSA) onto silica have been determined.
		The adsorption capacity for PVP increased with increasing molecular mass but was independent of pH and ionic strength.
		Furthermore, PVP was able to desorb most but not all BSA molecules from the silica particles.
	pubs.acs.org /cgi-bin/abstract.cgi/langd5/2002/18/i23/abs/la020376l.html (193 words)

	Adsorption of Polyvinylpyrrolidone onto Polystyrene Latices and the Effect on Colloid Stability
		Adsorption of Polyvinylpyrrolidone onto Polystyrene Latices and the Effect on Colloid Stability
		Isotherms have been determined for the adsorption of polyvinylpyrrolidone (PVP) samples of various molecular mass (10
		In the absence of electrolyte, stability was achieved due to electrostatic repulsions between the PS particles whereas in 0.5 M NaCl stability was achieved through steric repulsions for the higher molecular mass PVP samples (i.e.
	pubs.acs.org /cgi-bin/abstract.cgi/langd5/1996/12/i16/abs/la950933m.html (361 words)

	Polyvinylpyrrolidone Suppliers from the Largest World-Wide Directory - Distributors, manufacturers, and wholesalers of ...
		Polyvinylpyrrolidone Suppliers from the Largest World-Wide Directory - Distributors, manufacturers, and wholesalers of polyvinylpyrrolidone
		PowerSourcing is your best source for finding polyvinylpyrrolidone suppliers.
		Use our expansive on-line directory to source polyvinylpyrrolidone and other products and services from thousands of suppliers.
	www.powersourcing.com /sf/polyvinylpyrrolidone.htm (111 words)

	Coprecipitation of Nonoxynol-9 With Polyvinylpyrrolidone To Decrease Vaginal Irritation Potential While Maintaining ...
		The aim of this study was to test the hypothesis that polyvinylpyrrolidone (PVP) would increase the critical micelle concentration (CMC) of nonoxynol-9 (N-9), providing a reduction in its irritation potential, while maintaining essential spermicidal activity.
		Solid coprecipitates of N-9 with PVP were manufactured with the use of a modified lyophilization process.
		Ben-David A, Gavendo S. The protective effect of polyvinylpyrrolidone and hydroxyethyl starch on noncryogenic injury to red blood cells.
	www.aapspharmscitech.org /view.asp?art=pt040330&pdf=yes (3963 words)

	(WO/1997/033645) ADHESIVE COMPOSITIONS INCLUDING POLYVINYLPYRROLIDONE, ACRYLIC ACID POLYMERS, AND POLYAMINES (Site not responding. Last check: 2007-11-01)
		(EN) A composition comprising a cross-linked salt of (a) a polyvinylpyrrolidone having ring opened pyrrolidone groups; (b) at least one acrylic acid-containing or methacrylic acid-containing polymer; and (c) an amine-containing polymer.
		The composition may be used as a pressure-sensitive adhesive, has good tack, and may be peeled from the body or from an object without causing damage or injury to the body or object.
		(FR) Composition comprenant un sel réticulé de (a) une polyvinylpyrrolidone présentant des groupes pyrrolidone ouverts en cycle; (b) au moins un polymère contenant de l'acide acrylique ou de l'acide méthacrylique; et (c) un polymère contenant une amine.
	www.wipo.int /pctdb/en/wo.jsp?KEY=97/33645.970918 (232 words)

	090. Polyvinylpyrrolidone (FAO Nutrition Meetings Report Series 40abc) (Site not responding. Last check: 2007-11-01)
		Definition Polyvinylpyrrolidone contains not less than 95 per cent.
		Biological Data Biochemical aspects Polyvinylpyrrolidone (PVP) is a macromolecular polymer of N-vinylpyrrolidone.
		It is metabolically inert in rat, dog and man as shown by experiments using
	www.inchem.org /documents/jecfa/jecmono/40abcj48.htm (921 words)

	e-Polymers (Site not responding. Last check: 2007-11-01)
		Viscometric investigations on the intrinsic viscosity of polyvinylpyrrolidone affected by polymer-polymer interactions in solution
		The intrinsic viscosity of polyvinylpyrrolidone (PVP) and various added polymers was investigated by the polymer-solvent method.
		It has been found that both polymer-polymer interactions and the concentration of the added polymer affect the intrinsic viscosity of PVP.
	www.e-polymers.org /abstract_shw.cfm?Abstract_id=430 (161 words)

	Development of Procedures for Direct Extraction of Cryptosporidium DNA from Water Concentrates and for Relief of PCR ... (Site not responding. Last check: 2007-11-01)
		The inclusion of polyvinylpyrrolidone in PCR mixtures at the
		of the polyvinylpyrrolidone used in the previous study.
		Inclusion of polyvinylpyrrolidone in the polymerase chain reaction reverses the inhibitory effects of polyphenolic contamination of RNA.
	aem.asm.org /cgi/content/full/71/3/1135 (5744 words)

	Safety (MSDS) data for polyvinylpyrrolidone (Site not responding. Last check: 2007-11-01)
		Synonyms: poly(n-vinylbutyrolactam), poly(vinylpyrrolidone), povidone, PVP, agent AT 717, agrimer, albigen A, aldacol Q, AT 717, bolinan, 1-ethenyl-2-pyrrolidone polymer, Ganex P 804, hemodesis, Hueper's polymer No. 5, demodez, K15, K25, K30, K60, luviskol k90, kollidon, kollidon 17, kollidon 30, plasdone XL, polyvidone, povidone, PVP, numerous other trade names
		Use: Permitted food additive; also widely used in other applications, such as photography, detoxification of chemicals, detergents, etc.
		We have not verified this information, and cannot guarantee that it is up-to-date.
	ptcl.chem.ox.ac.uk /MSDS/PO/polyvinylpyrrolidone.html (176 words)

	SPI-Chem Polyvinylpyrrolidone (PVP) - SPI Supplies
		Polyvinylpyrrolidone: Osmotic adjustor for LR Gold™ resin system
		Polyvinylpyrrolidone (PVP) to some is thought of as being a "miracle" polymer because it has so many almost amazing applications.
		In filtration science, it is known most widely as a treatment for membrane filters to make them more wetable to enhance filtration kinetics.
	www.2spi.com /catalog/chem/labels/pvp.shtml (250 words)

	Study on the interactions between polyvinylpyrrolidone (PVP) and acetaminophen crystals: Partial dissolution pattern ...
		Study on the interactions between polyvinylpyrrolidone (PVP) and acetaminophen crystals: Partial dissolution pattern change
		The objective of the study was to investigate the interactions between polyvinylpyrrolidone (PVP) and acetaminophen crystal especially on crystal surface.
		The effects of PVP on the etching pattern change of the acetaminophen (010) face, solubility enhancement as well as the intrinsic dissolution rate (IDR) of acetaminophen crystals have been studied.
	www.aapspharmaceutica.com /search/view.asp?ID=68516 (243 words)

	IngentaConnect Anaphylaxis to polyvinylpyrrolidone in an analgesic preparation (Site not responding. Last check: 2007-11-01)
		Scratch testing of the whole preparation was positive in contrast with the negative results obtained with pure acetaminophen.
		Therefore, scratch tests with the remaining drug components were performed and showed polyvinylpyrrolidone (PVP) to be the aetiological agent.
		Furthermore, specific IgE antibodies against PVP were demonstrated using a dot blot technique, thus ruling out a pseudo-allergic reaction.
	www.ingentaconnect.com /content/bsc/bjd/2000/00000143/00000005/art03843 (179 words)

	Antitumor Activity of Tumor Necrosis Factor-{{alpha}} Conjugated with Polyvinylpyrrolidone on Solid Tumors in Mice -- ... (Site not responding. Last check: 2007-11-01)
		Antitumor Activity of Tumor Necrosis Factor-{{alpha}} Conjugated with Polyvinylpyrrolidone on Solid Tumors in Mice -- Kamada et al.
		Conjugated with Polyvinylpyrrolidone on Solid Tumors in Mice
		Copyright © 2000 by the American Association for Cancer Research.
	cancerres.aacrjournals.org /cgi/content/abstract/60/22/6416 (309 words)

	JRM Feb2000: Influence of Polyvinylpyrrolidone on the Outcome of Intracytoplasmic Sperm Injection (Site not responding. Last check: 2007-11-01)
		JRM Feb2000: Influence of Polyvinylpyrrolidone on the Outcome of Intracytoplasmic Sperm Injection
		Title: Influence of Polyvinylpyrrolidone on the Outcome of Intracytoplasmic Sperm Injection
		Study Design: Seventy-seven cycles of ICSI were performed over a one-year period.
	www.jreprodmed.com /abs/jrm819.htm (182 words)

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