| 摘要 |
Moisture-curing, melt-applied polyurethane contact adhesive composition comprising a mixture of at least two polyether-based polyurethane prepolymers prepared from a low-molecular weight polyether (MW less than 1000) and a high-molecular weight polyether (MW greater than 1000) together with polyisocyanates, the mixture having an initial glass transition temperature in the range -5 DEG C to +10 DEG C and when applied as a melt at a temperature between the melting point of the composition and 140 DEG C is effective as a contact adhesive after cooling to room temperature. Open times up to one hour are obtained. |
