| abstract |
The present invention relates to hot melt adhesive compositions comprising a) at least one thermoplastic silane grafted poly-a-olefin (P) that is solid at 25 DEG C; and b) at least one reaction product (RP) of a polyisocyanate having an isocyanate-reactive silane (S), wherein the isocyanate-reactive silane (S) comprises exactly one group reactive to an isocyanate group, selected from the group consisting of a hydroxyl group, a mercapto group, and an amino group, and wherein the reaction product comprises a molecular weight Mw of less than 1500 g/mol. Said hot melt adhesives adhere well to both polar and nonpolar substrates, comprise an extended working life even in thin layers, but nevertheless rapidly develop high early adhesion and retain in particular good adhesion, primarily in warm and humid storage areas over a longer period of time. |