Moisture curable organopolysiloxane compositions

摘要

The present invention provides curable compositions comprising non-Sn organo-metal catalysts that accelerate the condensation curing of moisture curable silicones/non-silicones. In particular, the present invention provides La(III) complexes that are particularly suitable as replacements for organotin for sealant and RTV formulations. The La(III) complexes are comparable to organotin such as DBTDL and exhibit certain behavior in the presence of components that allow for tuning or adjusting the cure characteristics of the present compositions and provide good adhesion and storage stability.

主权项

1. A composition for forming a cured polymer composition comprising:
(A) a polymer having at least a reactive silyl group; (B) a crosslinker or chain extender; (C) a catalyst chosen from a lanthanum (III) (La-III) complex; (D) at least one adhesion promoter chosen from a silane or siloxane other than the compounds listed under (B); (E) optionally, a filler component; and (F) at least one co-catalyst chosen from an acidic compound.