| abstract |
A room temperature rapid-curable silicone composition is provided which includes (A) an organopolysiloxane terminated with hydroxyl groups, having a viscosity of from 25 mPa.s to 1,000,000 mPa.s at 25° C.; (B) a compound selected from the group consisting of a hydrolyzable silane represented by the following general formula (1):wherein R represents a monovalent hydrocarbon group having 1 to 12 carbon atoms; X represents a compound selected from the group consisting of a ketoxime group, an alkoxyl group, an alkenoxyl group and an acyloxyl group; and n represents an integer of 0 to 2, and a partial hydrolysis-condensation product thereof; and (C) a water-containing wet-process silica having an average particle diameter of 100 mum or smaller, which is a chief source for feeding water necessary for condensation curing reaction. This composition has a good storage stability, is rapid-curable upon mere blending, and becomes an elastic body with good heat resistance, moisture resistance and water-exposure adhesive properties. The composition is useful as a sealant for various electric and electronic parts and common constructional joints, as an oil seal for automobiles and also as a coating material. |