Olin Corporation

Arch Chemicals, Inc.

Innovative Water Care, LLC

Rahim Hani

Craig Waldron

Douglas A Farmer, Jr

Phillip T Berkowitz

Roger W Day

Richard H Dumas

David F Gavin

George A Polson

John Joseph Jardas

John L Peterson

James M O'Connor

David A Steele

Henry W Schiessl

Steven A Manke

Charles E Branch

Charles H Harrison

Lianjun Shi

Cynthia M Ward

Bruce Beardsley Anderson

Robert E McMahon

Michael A Kennedy

David Lei

Richard Dumas

Chemical tablet for aquatic systems

Disclosed herein is a cost effective and environmentally friendly process to prepare 1-hydroxy-6-substituted pyridones from 2,6-dichloropyridine. The process includes the steps of (a) reacting 2,6-dichloropyridine with hydrogen peroxide in the presence of trifluoroacetic acid at a first temperature to produce a first intermediate containing (1) trifluoroacetic acid and (2) 2,6-dichloropyridine N-oxide and/or salts thereof; (b) adding sulfuric acid to the first intermediate to provide a second intermediate; (c) removing trifluoroacetic acid from the second intermediate to provide a composition containing 2,6-dichloropyridine N-oxide and/or salts thereof which is essentially free of trifluoroacetic acid; (d) reacting 2,6-dichloropyridine N-oxide and/or salts thereof from step (c) with RXH and a base wherein each R is independently a substituted or unsubstituted hydrocarbyl group having between 1 and 20 carbon atoms, X is oxygen or sulfur, to produce a corresponding 2,6-disubstituted-pyridine N-oxide; and (e) heating the disubstituted compound thereby producing the 1-hydroxy-6-substituted pyridone.

Process for the preparation of 1-hydroxy-6-substituted pyridones

A method of preparing a silicon-containing polymeric structure coated/encapsulated active ingredient is disclosed. The method has the steps of providing an insoluble active ingredient; dispersing the active ingredient in a liquid medium to form a suspension of the active ingredient; adding a silicon-containing polymeric structure precursor to the suspension; and reacting the precursor to form the silicon-containing polymeric structure. The silicon-containing polymeric structure is formed around the active ingredient, thereby forming a silicon-containing polymeric structure coated/encapsulated active ingredient. The silicon-containing polymeric structure coated/encapsulated active ingredient may be used in place of the active ingredient itself.

Encapsulation of active ingredients and method of making

The present invention generally relates to a novel process for preparing alkali metal pyrithione from pyridine N-oxide, using a sulfurination agent and a base agent. In particular, the present invention relates to an efficient process for preparing polyvalent metal complexes of sodium pyrithione from the alkali metal pyridine N-oxide described herein.

Process for preparing alkali metal pyrithione and its polyvalent metal complexes from pyridine oxide

Disclosed is a personal care composition comprising: (a) water or an alcohol, (b) at least one dispersant or surfactant, and (c) as an antimicrobial or preservative additive, particles of an in-situ transchelation reaction product of a zinc compound selected from the group consisting of zinc salts of organic acids, zinc salts of inorganic acids, zinc hydroxide, zinc oxide, and combinations thereof, said zinc compound being soluble in said water or alcohol, with pyrithione acid or a pyrithione salt that is soluble in said water or alcohol. Also disclosed is a process for preparing the personal care composition, and a coated substrate containing a coating of the personal care composition.

In-situ generation of zinc pyrithione in personal care compositions

The present invention relates to a method for producing submicron-sized particles of pyrithione salts, comprising reacting pyrithione or a water-soluble salt of pyrithione and a water-soluble polyvalent metal salt in a pressurized turbulent flow reactor that generates pulverizing forces, the reaction producing submicron sized particles of pyrithione salt. The present invention also relates to particles made by the above method, and products, such as shampoos, soaps, and skin care medicaments made using these particles.

Method for producing particles of pyrithione salts and particles so

This invention relates to a process improvement for preparing a storage-stable dispersion of a biocide which comprises the steps of: (a) dispersing a solid biocide and a carrier to form a biocide concentrate, (b) heating said biocide concentrate to an elevated temperature to provide a storage stable mixture of biocide, resin and carrier, and (c) cooling said mixture under continuous stirring to provide a homogeneous, storage-stable liquid dispersion. Also claimed is the storage-stable product produced by this process.

Process for incorporating biocides into a liquid dispersion

The present invention relates to novel 1-hydroxy-6-substituted pyridine-2-one and 1-hydroxy-6-substituted pyridine-2-thione compounds. Also disclosed is a process for producing the compound(s) and an antimicrobial composition comprising the compound(s) and at least one component selected from the group consisting of soaps, adhesives, coatings, elastomers, sealants, shampoos, skin care medicaments, cosmetics, paints and other polymer compositions.

1-hydroxy-6-substituted pyridine-2-ones and 1-hydroxy-6-substituted

This invention relates to a multi-step process for preparing a storage-stable dispersion of a biocide which comprises the steps of: (a) contacting a heat-swellable resin with a carrier to provide a liquid mixture of a resin and a carrier, (b) heating said liquid mixture to an elevated temperature to cause the resin to swell by virtue of carrier absorption into the resin to provide a swelled resin in said liquid mixture, and (c) adding a biocide to said swelled resin and mixing to provide a homogeneous, storage-stable liquid dispersion.

The present invention relates to a process for preparing 2,6-dichloropyridine which comprises reacting an organic solvent-free, catalyst-free reaction mixture comprising 2-chloropyridine and chlorine in the presence of a hydrogen chloride scavenger and ultraviolet light, and optionally in the presence of added moisture, at a temperature of between about 90.degree. C. and about 185.degree. C. Also claimed is a method for preventing calcium chloride plugging of the chlorine feed stream and for preventing calcium chloride build-up in the above reaction mixture which comprises adding moisture in the form of water or steam, or a combination thereof, to the reaction mixture prior to, or during, the reaction of said process.

Process for preparing 2,6-dichloropyridine

The present invention relates to novel 1-hydroxy-6-substituted-pyridone compounds. Also disclosed is a process for producing the compound(s) and an antimicrobial composition comprising the compound(s) and at least one component selected from the group consisting of soaps, adhesives, coatings, elastomers, sealants, shampoos, skin care medicaments, cosmetics, paints and other polymer compositions.

1-hydroxy-6-substituted-2-pyridones

The present invention relates to a composition comprising an antimicrobial effective amount of a biocide selected from the group consisting of aromatic 2-N-hydroxy-thiourea and N-hydroxy-quinazolinone, and derivatives and combinations thereof, and at least one component selected from the group consisting of soaps, shampoos, skin-care medicaments, cosmetics, plastics and paints. Also disclosed is a novel process for making the biocide.

Process for making N-hydroxyl-2-thio-ouinazolin-4-ones

The present invention relates generally to paint and paint base and, more specifically, to a process and composition for providing a stable gel-free dispersion of zinc pyrithione plus cuprous oxide in paint. In accordance with the process of the present invention, the paint or paint base contains a carboxylic acid in order to impart desired gelation inhibition to the paint.

Gel-free paint containing zinc pyrithione cuprous oxide and carboxylic

Energetic binders, and, more specifically, a class of nitramine-containing polyether polymers characterized by favorable viscosity and glass transition temperature, as well as resistance to hydrolysis are prepared.

Nitramine-containing polyether polymers and a process for the

The present invention relates, in one aspect, to a process for preparing a storage-stable dispersion of a biocide which comprises the steps of: (a) mixing a plastisol, comprising a resin and a carrier, and a biocide to provide a mixture of said plastisol and said biocide (b) heating said mixture of plastisol and biocide to an elevated temperature of between about 30.degree. C. and about 100.degree. C. to provide a homogeneous, storage stable dispersion, said dispersion containing said biocide in an amount of between about one and about 30 weight percent based upon the weight of said dispersion, said resin being present in an amount of between about 5 and about 75 weight percent based upon the weight of said dispersion, with the proviso that when the weight percent of said resin in said dispersion is between about 30% and about 75%, then said elevated temperature is between 30.degree. C. and 45.degree. C., and when the weight percent of said resin in said dispersion is between about 5% and about 29%, then said elevated temperature is between 46.degree. C. and 100.degree. C., and (c) cooling the dispersion to a temperature of between about -20.degree. C. and about 40.degree. C. to provide a storage-stable mixture having a viscosity of between about 2,000 and about 30,000 centipoise.

Growing community of inventors

Cheshire, CT, United States of America

Rahim Hani