POLYURETHANE PREPOLYMER, STABLE AQUEOUS DISPERSIONS WITH HIGH SOLIDS CONTAINING THE SAME AND METHOD OF USING AND PREPARING THE AQUEOUS DISPERSIONS

A polyurethane dispersion containing the reaction product of a polyurethane prepolymer and water are shear, shelf, temperature, pH and electrolyte stable. The amount of the reaction product in the dispersion may be as high as 60 weight percent. The prepolymer may be the reaction product of a polyiso...

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Bibliographic Details
Main Authors SKAGGS, KENNETH, W, ERDEM, BEDRI, PARKS, FRANKLIN, E, WANG, KUAN, J, BHATTACHARJEE, DEBKUMAR
Format Patent
LanguageEnglish
French
German
Published 27.06.2012
Subjects
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOSITIONS BASED THEREON
CORRECTING FLUIDS
DYES
FILLING PASTES
INKS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
POLISHES
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF MATERIALS THEREFOR
WOODSTAINS
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Summary:A polyurethane dispersion containing the reaction product of a polyurethane prepolymer and water are shear, shelf, temperature, pH and electrolyte stable. The amount of the reaction product in the dispersion may be as high as 60 weight percent. The prepolymer may be the reaction product of a polyisocyanate and a hydrophilic alkylene oxide polyol or polyamine having a molecular weight of between 800 and 1,500 and an active-hydrogen containing material, such as a polyol, and optionally, a surfactant. The hydrophilic alkylene oxide polyol or polyamine is present in an amount sufficient to reduce the interfacial tension of the prepolymer to less than or equal to 10 dynes/cm. The amount of ethylene oxide in the prepolymer is between from about 0.5 to about 5.5 weight percent. The water solubility of the high molecular weight active-hydrogen containing material is typically less than about 10.0 g per 100 g of water. The dispersion produced from the prepolymer has high solids content and excellent shear and shelf stability. Solvent free dispersions of such polyurethanes may be prepared from a continuous HIPR procedure.
Bibliography:Application Number: EP20030783756