Silyl modified polymers (SMP, also silane-modified polymers, modified-silane polymers, silane terminated polymers, etc.) are polymers (large, chained molecules) terminating with a silyl group. SMPs are the main components in solvent-free and isocyanate-free sealant and adhesive products. Typically the sealant products manufactured with silyl modified polymers have good adhesion on a wide range of substrate materials, and have good temperature and UV resistance.
Curing process
The products cure from a liquid or gel state to a solid. Curing entails crosslinking by the hydrolysis of silyl ethers:
RSi(OCH3)2R' + H2O → [RSi(OCH3)R']2O + 2 CH3OHThis hydrolysis generates siloxane linkages. A catalyst is required for this condensation process.
References
Silyl modified polymers Wikipedia(Text) CC BY-SA