| 摘要 |
PROBLEM TO BE SOLVED: To provide a moisture-curable reactive hot melt adhesive that does not show fiber cutting even when the adhesive is painted as long fibers elongated by contact with pressurized air, and does not damage texture of a painted base material as the coating is soft. SOLUTION: The moisture-curable reactive hot melt adhesive contains an isocyanate-terminated urethane prepolymer obtained by a reaction of a polyester polyol having following conditions A-C with a polyfunctional isocyanate compound, i.e. A. It contains a liquid polyester polyol as the polyester polyol, B. It contains a noncrystalline polyester polyol as the polyester polyol, thereby, a ratio of the noncrystalline polyester polyol having melt viscosity at 120°C of not higher than 3,000 mPa s is not more than 50 wt.% against the total noncrystalline polyester polyol, and C. It does not contain a crystalline polyester polyol as the polyester polyol or contains not more than 5 wt.% of the total polyester polyol. COPYRIGHT: (C)2009,JPO&INPIT
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