THERMALLY EXPANDABLE COMPOSITIONS AND USE THEREOF IN WELDING SEALER TAPES

The invention is directed to a thermally expandable composition comprising at least one solid rubber R, at least on tackifying resin TR, at least one blowing agent BA, a vulcanization system VS, and 0.5 - 30 wt.-% of fibrous magnesium oxysulphate or carbon fibers or a mixture thereof. The invention...

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Bibliographische Detailangaben
Hauptverfasser:	YAMADA, Shunsuke, URAYAMA, Satoshi
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COMPOSITIONS BASED THEREON CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING GENERAL PROCESSES OF COMPOUNDING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SOLDERING OR UNSOLDERING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WELDING WORKING BY LASER BEAM WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention is directed to a thermally expandable composition comprising at least one solid rubber R, at least on tackifying resin TR, at least one blowing agent BA, a vulcanization system VS, and 0.5 - 30 wt.-% of fibrous magnesium oxysulphate or carbon fibers or a mixture thereof. The invention is also directed to a shaped article comprising a substrate layer composed of the thermally expandable composition, to a method for providing sealing, structural adhesion, baffling, or combination thereof to a structure of a manufactured article, and to use of fibrous magnesium oxysulphate or carbon fibers or a mixture thereof in a thermally expandable composition to improve sag resistance and/or flame resistance properties of said composition. L'invention porte sur une composition thermiquement expansible comprenant au moins un caoutchouc solide R, au moins une résine donnant du collant TR, au moins un agent gonflant BA, un système de vulcanisation VS et 0,5 à 30 % en poids d'oxysulfate de magnésium fibreux ou de fibres de carbone ou d'un mélange de ceux-ci. L'invention porte également sur un article façonné comprenant une couche de substrat composée de la composition thermiquement expansible, sur un procédé pour assurer l'étanchéité, l'adhérence structurale, un chicanage ou une combinaison de ceux-ci dans une structure d'un article manufacturé et sur l'utilisation d'oxysulfate de magnésium fibreux ou de fibres de carbone ou d'un mélange de ceux-ci dans une composition thermiquement expansible pour améliorer la résistance à l'affaissement et/ou les propriétés de résistance à la flamme de ladite composition.