| 摘要 |
<p>Moisture-crosslinkable polyurethane (PUR) hot melt adhesive (I) with high initial strength, is obtained by reacting (A) an aliphatic, cycloaliphatic, (cyclo)aliphatic or aromatic NCO prepolymer with an NCO content of 1-23% with (B) a polyamine which either (1) contains at least two sterically hindered amino (HA) groups of formula (II) or (2) has the composition (III), in which n = 3-6, so as to provide 1-0.6 HA groups per NCO group for reaction. Also claimed is a process for the production of (I) by mixing (A) with (B) at 100-150 degrees C.</p> |
