Room temperature vulcanizable organopolysiloxane compositions.

摘要

This invention relates to a room temperature vulcanizable organopolysiloxane composition which comprises a diorganopolysiloxane whose molecular chain is terminated with a hydroxyl group at both ends thereof, a crosslinking agent consisting of iminoxysilanes and/or partial hydrolyzates thereof. an organic tin catalyst, and a basic inorganic filler. The composition is characterized by further comprising an organosilicon compound of the following formula <CHEM> wherein two R<4>'s may be the same or different and independently represent a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group, two R<5>'s may be the same or different and independently represent a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group, R<6> represents an alkyl group or an alkoxyalkyl group, a is a value of 0 or 1, n is zero or an integer of 1 to 3. The composition is useful for use as a sealant particularly to FIPG systems. <IMAGE>