AQUEOUS POLYURETHANE RESIN, METHOD FOR PRODUCING AQUEOUS POLYURETHANE RESIN AND FILM

Disclosed is an aqueous polyurethane resin which forms a stable emulsion, while having good balance between hydrophilicity and hydrophobicity. In addition, a film made from such an aqueous polyurethane resin has a desired moisture permeability and good stability. Also disclosed are a method for prod...

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Bibliographische Detailangaben
Hauptverfasser:	HIRATA FUMIAKI, ISOBE MASAHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	Disclosed is an aqueous polyurethane resin which forms a stable emulsion, while having good balance between hydrophilicity and hydrophobicity. In addition, a film made from such an aqueous polyurethane resin has a desired moisture permeability and good stability. Also disclosed are a method for producing such an aqueous polyurethane resin and a film obtained from such an aqueous polyurethane resin. Specifically disclosed is an aqueous polyurethane resin containing a plurality of aqueous polyurethane resins, each obtained by reacting a macropolyol, a polyisocyanate and a chain extender. The aqueous polyurethane resins contain different macropolyols from one another, and are chemically bonded to one another partially via the chain extender. A film can be obtained by casting or coating this aqueous polyurethane resin.