| 摘要 |
PCT No. PCT/EP92/00546 Sec. 371 Date Sep. 20, 1993 Sec. 102(e) Date Sep. 20, 1993 PCT Filed Mar. 12, 1992 PCT Pub. No. WO92/16592 PCT Pub. Date Oct. 1, 1992Hot melt adhesives having an "open time" of 10 minutes or longer, preferably more than 1 hour and, more preferably, more than 2 hours for a contact pressure of 5 kg/cm2 and atmospheric conditions of 25 DEG C./26% relative air humidity are provided. Immediately after the parts to be joined have been pressed together at 18 DEG to 23 DEG C., strengths (initial strengths) of 1 MPa and more and preferably more than 1.5 MPa are obtained. The hot melt adhesive is comprised of 1) a polyester, polyamide, polyethylene/vinyl acetate, or NCO-terminated polyurethane prepolymer which does not crystallize during the open time and 2) a tackifier and/or a plasticizer.
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