| abstract |
The present invention relates to a hot melt adhesive composition comprising two thermoplastic polyurethane copolymers (A) and (B), nwherein the thermoplastic polyurethane copolymer (A) comprises a reaction product of at least one polyester polyol; and nat least one polyisocyanate; and nhas a number average molecular weight (M n ) of at least 25,000 g/mol; nwherein the thermoplastic polyurethane copolymer (B) comprises a reaction product of at least one polyester polyol; and nat least one polyisocyanate; and nhas a number average molecular weight (M n ) of less than 25,000 g/mol; and nwherein the hot melt adhesive composition has a melt viscosity of 1,000 to 100,000 mPas at 160 °C. |