| 摘要 |
PROBLEM TO BE SOLVED: To provide a reactive hot-melt adhesive composition exerting high initial adhesive force with long-term adhesivity even after melted once and then cooled, and also nonadhesive or slightly adhesive at unloading from a packaged container for charging into a melting tank or the like prior to use, therefore compatible with packaged form of low environmental burden such as an aluminum pack. SOLUTION: The reactive hot-melt adhesive composition is based on an isocyanate group-terminated urethane prepolymer, wherein the urethane prepolymer comprises a urethane prepolymer component having a crystalline skeleton of a polyester formed by reaction between adipic acid and butanediol and a urethane prepolymer component having a noncrystalline skeleton of a polyester with a glass transition temperature of 25°C or higher in the weight ratio of the former component to the latter component of (1:2) to (2:1). COPYRIGHT: (C)2006,JPO&NCIPI
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