Polyurethane dispersion in alcohol-water system

A polyurethane dispersion and a method of making are provided. The polyurethane dispersion is stable in a mixture of alcohol and water. The dispersion comprises the reaction product of (a) an isocyanate terminated polyurethane prepolymer comprising the reaction product of (i) at least one oligomeric...

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Bibliographische Detailangaben
Hauptverfasser:	S.S. KANTNER, K.M. LEWANDOWSKI, M.T. SCHOLZ
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMISTRY COMPOSITIONS BASED THEREON DISINFECTION, STERILISATION, OR DEODORISATION OF AIR DYES HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	A polyurethane dispersion and a method of making are provided. The polyurethane dispersion is stable in a mixture of alcohol and water. The dispersion comprises the reaction product of (a) an isocyanate terminated polyurethane prepolymer comprising the reaction product of (i) at least one oligomeric polyactive hydrogen compound insoluble in said alcohol, wherein said polyactive hydrogen compound is an alkyl, aryl, or aralkyl structure optionally substituted by N, O, and S; (ii) at least one polyisocyanate, and (iii) at least one polyactive hydrogen compound soluble in said mixture of alcohol and water; (b) a polyfunctional chain extender; and (c) a monofunctional chain terminator; wherein the equivalent ratio of difunctional chain extender to prepolymer isocyanate is 0.60 to 1.20.