ETHYLENE-VINYL ACETATE POLYURETHANE FOR HOT-MELT ADHESIVES

The invention relates to a composition for a crosslinkable hot-melt adhesive and made from an ethylene-vinyl acetate copolymer containing primary hydroxyl functional groups and from a blocked polyisocyanate. This composition, combined with an adhesive (tackifying) resin which may, furthermore, be us...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JACQUES BOUTILLIER, YVES LERMAT, NOELLE FORICHON
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON DYES MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	The invention relates to a composition for a crosslinkable hot-melt adhesive and made from an ethylene-vinyl acetate copolymer containing primary hydroxyl functional groups and from a blocked polyisocyanate. This composition, combined with an adhesive (tackifying) resin which may, furthermore, be used as an agent for blocking the polyisocyanate, results in a crosslinkable hot-melt adhesive. The adhesive is employed at a temperature which is at least equal to that for deblocking the isocyanate functional groups of the polyisocyanate. The bonding retention temperature of such adhesives can reach 200-220 DEG C.