Olin Corporation

Arco Chemical Technology, L.p.

Michael J Morgan

Roger W Day

James M O'Connor

Kiran B Chandalia

Feagin A Wing, Jr

Paul V Grosso

Michael M Martinez

Willard F Burt

Louis C Fiorucci

Stephen P Noe

Renate C Stegmeier

Shao-Hua Guo

Thomas J Gray

Donald L Lickei

Stephen L Goldstein

Fred A Stuber

Norman G Masse

Tai-Nang Huang

Williard F Burt

Two-component polyurethane coating formulations comprising an aqueous dispersion of a polyisocyanate and a neutralized, water-dispersible resin are disclosed. The neutralized, water-dispersible resin incorporates recurring units of an allylic alcohol or an alkoxylated allylic alcohol. These low-VOC formulations use commercial polyisocyanates and ordinary mixing techniques. The uniquely uniform distribution of hydroxyl groups in the resin contributes to an excellent overall balance of coating properties from the 2K system, including high gloss, hardness, impact resistance, flexibility, weatherability, and chemical resistance.

Two-component aqueous polyurethane coatings

This invention relates to a process for coating a substrate comprising contacting the substrate with a low volatile organics, moisture curable, two-component coating composition comprising an admixture of an A-side and a B-side, said A-side comprising an aliphatic polyisocyanate having an isocyanate index relative to the number of isocyanate-reactive groups in said coating composition of at least about 200, preferably at least about 300, more preferably at least about 500, said B-side comprising a tertiary amine catalyst and optionally an isocyanate-reactive compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, said coating composition optionally containing a solvent in an amount of less than about 45%, based upon the weight of the polyisocyanate in said coating composition, said coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Low VOC, moisture curable, two-component coating compositions based on

This invention relates to a process for coating a substrate which comprises contacting the substrate with a low volatility organic (so-called 'low VOC') coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate prepolymer which is the reaction product of a polyisocyanate with an active hydrogen-containing compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Low VOC, moisture curable, one-component coating compositions based on

This invention relates to a process for coating a substrate other than polyvinyl chloride which comprises contacting said substrate with a fast drying, moisture curable, low volatility organic coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.

Low VOC, fast drying, moisture curable, one-component isocyanate-based

An electrostatic method is disclosed for providing multicolor imaging from a single toner bath. The toner bath is a blend of individual toners, each of which contains a color precursor different from the others. Also disclosed is a method for the double encapsulation of toner particles to produce toner particles characterized by multiple encapsulation.

Electrostatic method for multicolor imaging from a single toner bath

This invention pertains to optical and electrical switching devices and to novel polymers containing pendant organic charge transfer moieties and useful in the fabrication of the switching devices.

Polymer composition containing pendant organic charge transfer salt

A positive or negative latent image can be developed with negatively or positively charged toner particles, respectively, that are microcapsular. The shell material of the toner particles is a melamine-formaldehyde resin or a starch-based material. The core is a liquid solution comprising at least a liquid, ethylenically unsaturated monomer, a leuco dye and a photoinitiator.

Composition and electrophotographic use of microcapsular photoactive

This, invention relates to electrostatic imaging systems, and, more particularly, color-self-developing toner particles and processes for the fabrication and use thereof. A blend of these toner particles is useful in multicolor electrostatic imaging using a single dry or liquid toner bath. Potential applications include full-color xerographic copying, full-color printing, full-color computer-generated imaging, and the like.

Color-self-developing, microcapsular toner particles

Optical and electrical switching devices and a polymer composition

An improved monolithic hydrogenation catalyst and processes for using same to hydrogenate animal and vegetable oils, said catalyst being comprised of a Raney metal alloy surface layer integral with and derived from a selected nickel alloy monolithic substrate mesh structure wherein said surface layer is predominantly derived from an adherent Beta structured crystalline precursor outer portion thereon. The catalyst is adaptable to both continuous and batch hydrogenation and shows enhanced activity, improved triene to diene selectivity and a low isomerization index. Hydrogenated oils show lower linolenic and stearic contents, lower trans-isomer percentages and lower melting points as compared to commercial products of equivalent iodine number.

Hydrogenation of long chain olefinic oils with Raney catalyst

A process is disclosed for removing contaminants from impure alkali metal nitrates containing them. The process comprises heating the impure alkali metal nitrates in solution form or molten form at a temperature and for a time sufficient to effect precipitation of solid impurities and separating the solid impurities from the resulting purified alkali metal nitrates. The resulting purified alkali metal nitrates in solution form may be heated to evaporate water therefrom to produce purified molten alkali metal nitrates suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of purified alkali metal nitrates.

Alkali metal nitrate purification

A nonaqueous, in-line method for removing carbonate and hydroxide contamination from a molten mixed sodium nitrate/potassium nitrate heat transfer salt. The method comprises dissolving a stoichiometric quantity of anhydrous Ca(NO.sub.3).sub.2 in the melt whereby an insoluble CaCO.sub.3 and Ca(OH).sub.2 precipitate is formed. The precipitate can be removed by settling, filtration or floatation techniques.

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Torrington, CT, United States of America

Michael J Morgan