Silane-terminated polyurethane crosslinking polymer for high tensile strength adhesive

A moisture curable composition, comprising:

• a first, crosslinkable copolymer having a plurality of silyl alkoxy terminal groups and a backbone that is the reaction product of a diisocyanate and a mixture of polyols, the mixture of polyols comprising a low molecular weight polypropylene diol having a molecular weight in the range of 1000-2,000 Mn and a high molecular weight polypropylene diol having a molecular weight in the range of 8,000-16,000 Mn;
• a second crosslinkable oligomer having a plurality of silyl alkoxy terminal groups and a backbone that is the reaction product of a diisocyanate and a low molecular weight polypropylene diol having a molecular weight in the range of 1,000-2,000 Mn;
• a third crosslinkable oligomer having a plurality of silyl alkoxy terminal groups and a backbone that is the reaction product of a diisocyanate and a high molecular weight polypropylene diol having a molecular weight in the range of 8,000-16,000 Mn.