Tin free silyl-terminated polymers

A method of producing a composition comprising a crosslinkable silane-terminated polymer having at least one crosslinkable silyl group in each molecule, the method comprising:

• providing a polymer having at least one unsaturated group and at least one alcoholic hydroxyl group in each molecule and having a number average molecular weight of between about 100 and about 10000;
• adding to the polymer a compound having a hydrogen-silicon bond and a crosslinkable silyl group in each molecule and a hydrosilylation catalyst to thereby carry out a hydrosilylation reaction to form a composition comprising hydrosilylated polyoxyalkylene polymers, wherein the hydrosilylation reaction has a hydrosilylation efficiency of at least about 70% as determined by 1H-NMR;
• reacting the hydrosilylated polyoxyalkylene polymers with at least one isocyanate at an isocyanate index of between about 80 and about 250 and in the presence of a first tin-free catalyst to form an isocyanate reacted hydrosilylated polymers;
• and
• optionally reacting the isocyanate reacted hydrosilylated polymer with a polyol having a nominal functionality of at least 2 to form a polyol reacted crosslinkable silane-terminated polymer.