Moisture curable oxyalkylene polymer containing composition

摘要

A moisture curing composition is disclosed comprising (a) an oxyalkylene polymer having at least one reactive silicon group in each molecule, (b) bis(3-triethoxysilylpropyl)tetrasulfane, and (c) a condensation catalyst. The presence of the bis(3-triethoxysilylpropyl)tetrasulfane in the composition improves the tensile strength and elongation of the cured composition. The present compositions are useful in such applications as sealing materials for construction both in the form of extrudable liquid compositions and as cured preformed configurations such as tapes.