Prefabricated sealing membrane based on a polyurethane modified bitumous binder and method of manufacture

Prefabricated waterproof membrane comprises a support coated and preferably impregnated with a thermoplastic bituminous composition comprising (wt.%): bitumen (40-90), thermoplastic polyurethane (10-50), aromatic oil (0-10), fillers (0-50) and catalyst (0-0.5). An Independent claim is also included...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BINDSCHEDLER, PIERRE ETIENNE, NOURI, ARNAUD, SCHALL, CORINNE, PERRIN, REMI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES BUILDING CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES FIXED CONSTRUCTIONS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR GUTTERS INKS LAUNDERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES ROOF COVERINGS ROOF-WORKING TOOLS SKY-LIGHTS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF TEXTILES OR THE LIKE USE OF MATERIALS THEREFOR WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL WOODSTAINS
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Beschreibung
Zusammenfassung:	Prefabricated waterproof membrane comprises a support coated and preferably impregnated with a thermoplastic bituminous composition comprising (wt.%): bitumen (40-90), thermoplastic polyurethane (10-50), aromatic oil (0-10), fillers (0-50) and catalyst (0-0.5). An Independent claim is also included for production of the membrane by applying the hot bituminous composition to the support in one or more coating or impregnation operations, where the bituminous composition is prepared either by: (a) synthesizing a thermoplastic polyurethane prepolymer, adding the prepolymer to molten bitumen, adding a chain extender, the catalyst and the other components, and heating and stirring the mixture until polymerization is complete; or (b) melting the bitumen, adding the polyol(s) and isocyanate for forming the polyurethane, stirring the mixture until the theoretical isocyanate (NCO) content is attained, adding a chain extender, the catalyst and optionally the other components, progressively increasing the temperature to about 180 degrees C, and stirring the mixture until polymerization is complete.