| 摘要 |
A moisture-curing hot-melt adhesive comprises (A) a urethane prepolymer comprising hard and soft segment moieties and having an isocyanate group at the terminus which is prepared by reacting stepwise a polyol having a molecular weight of 1,000 to 8,000 and a thermoplastic saturated polyester polyol having a molecular weight of 1,000 to 6,000, a melting point of 50 DEG C. or higher and a glass transition temperature of 10 DEG C. or higher with an diisocyanate compound in a overall NCO/OH ratio of 1.6 to 3.0, and (B) a urethane prepolymer comprising a soft segment moiety and having an isocyanate group at the terminus which is prepared by reacting a polyol having a molecular weight of not more than 8,000 with a diisocyanate compound in an NCO/OH ratio of 1.6 to 3.0, said component (A) and component (B) being mixed in a ratio of 10:90 to 90:10 by weight. Said adhesive has excellent adhesion and pressure-sensitive adhesion and initial properties and is suitable for adhering various parts in automobile industry and construction industry.
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