MOISTURE-CURABLE HOT MELT TYPE POLYURETHANE ADHESIVE

PURPOSE:To provide the subject adhesive containing a specifically constituted active isocyanate group-containing urethane prepolymer and having physical properties comprising a low melting viscosity, a high initial viscosity, a low elastic modulus and a high elongation. CONSTITUTION:The subject adhe...

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Bibliographische Detailangaben
Hauptverfasser:	SUGIMORI MASARU, YOSHIMOTO YASUYUKI
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:	PURPOSE:To provide the subject adhesive containing a specifically constituted active isocyanate group-containing urethane prepolymer and having physical properties comprising a low melting viscosity, a high initial viscosity, a low elastic modulus and a high elongation. CONSTITUTION:The subject adhesive comprises an active isocyanate group- containing urethane prepolymer obtained by reacting (A) the mixture of (i) 100 pts.wt. of a polyester polyol comprising 1,6-hexamethylene adipate, 1,6- hexamethylene terephthalate or their mixture and having a number-average mol.wt. of 2000-5000, (ii) 2-30 pts.wt. of ethylene-vinyl acetate copolymer having a vinyl acetate content of 30-60mol.% and (iii) 2-30 pts.wt. of a rosin ester having a melting point of 70-120 deg.C with (B) an excessive amount of a polyisocyanate compound.