AQUEOUS POLYURETHANE DISPERSION

PROBLEM TO BE SOLVED: To obtain an aqueous polyurethane dispersion capable of providing good appearance and durability after drying, further providing a non-adhesive finish, and usable for the finish of leather. SOLUTION: This aqueous polyurethane dispersion is obtained by regulating the molar ratio...

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Bibliographische Detailangaben
Hauptverfasser:	HASSEL TILLMANN DR, MUENZMAY THOMAS DR, MEIXNER JUERGEN, JOERG SCHOOP, REINERS JUERGEN
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPARATUS THEREFOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS FOR TANNING COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING HIDES INKS LEATHER 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 PELTS PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SKINS SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain an aqueous polyurethane dispersion capable of providing good appearance and durability after drying, further providing a non-adhesive finish, and usable for the finish of leather. SOLUTION: This aqueous polyurethane dispersion is obtained by regulating the molar ratio of a polyol of the component (a) to the total of polyols (b) and (d) so as to be (1:1.5)-(1:4), preferably (1:2)-(1:3), and the molar ratio of the total of the polyols (a), (b) and (d) to the polyisocyanate (c) so as to be (1:1.1)-(1:2.5), preferably (1:1.2)-(1:1.7). The polyurethane has 2-6, preferably 2-4 OH functionality, and