| 摘要 |
<p>1. Adhesive fusible consisting of a composition comprising a prepolymer isocyanate, a lower molecular synthetic resin and optionally a thermoplastic polymer, characterized in that the composition comprises the following components : a) 20 to 90% by weight of prepolymer isocyanate, b) from about 0 to 75% by weight of a thermoplastic polyurethane consisting of diisocyanates, polyolen with a molecular weight of from about 1,000 to 3,000 and optionally shortbranched diolens with end-position primary or secondary OH-groups, whereby the quantity ratio of said components is selected such that the thermoplastic polyurethane practically does not contain any free OH- and NCO-groups and has a melting point of from about 70 to 170 degrees C, and c) further comprising from about 5 to 50% by weight of a lower molecular synthetic resin selected from the group containing ketone-aldehyde-condensation resins and/or hydration products of acetophenone condensation resins.</p> |
