MOISTURE CURABLE SYSTEMS BASED ON POLYSILYLATED POLYETHERS AND TITANIUM (IV) CATALSTS AND/OR ZINC/CYCLIC AMIDINE CATALYST MIXTURES

摘要

Moisture-curable polysilylated polyether compositions contain titanium (IV) catalysts and/or zinc/amidine catalyst mixtures and are devoid of or nearly devoid of tin compounds. The titanium catalysts and zinc/amide catalyst mixtures are surprisingly found to be highly effective, even when the moisture- curable silane groups of the compositions are dialkoxysilyl groups. The moisture- cured compositions are surprisingly stable when aged at high temperatures. In addition, the compositions are surprisingly storage- stable in the uncured state, particularly when the polysilylated polyethers contain aliphatic urethane groups. The polyether compositions are also preferably devoid of aminosilane adhesion promoters.