Room temperature curable polyorganosiloxane composition

Claim 1

A room temperature curable polyorganosiloxane composition comprising: (A) 100 parts by weight in total of: (1) a polydiorganosiloxane of the general formula: R.sub.a.sup.1 (R.sup.2 O).sub.(3-a) SiO--R.sub.2 SiO--.sub.n Si(OR.sup.2).sub.(3-a) R.sub.a.sup.1 wherein R and R 1 are the same or different and represent a monovalent substituted or unsubstituted hydrocarbon group, R 2 represents a monovalent group selected from the group consisting of alkyl groups having 1 to 4 carbon atoms and alkoxyalkyl groups having 1 to 6 carbon atoms in total, a represents a number of 0 or 1 and n represents a number for controlling the viscosity of (a) from 100 to 500,000 cP at 25° C., and (2) a silane of the general formula: R.sub.b.sup.3 Si(OR.sup.4).sub.4-b wherein R 3 represents a monovalent substituted or unsubstituted hydrocarbon group, R 4 represents a monovalent group selected from the group consisting of alkyl groups having 1 to 4 carbon atoms and alkoxyalkyl groups having 1 to 6 carbon atoms in total and b represents a number of 0 or 1, or a partially hydrolyzed condensate thereof with the proviso that the amount of (A)(1) is 85 to 100 wt. % based on the total of (A)(1) and (A)(2); (B) 0.01 to 10 parts by weight of a curing catalyst; (C) 0.5 to 10 parts by weight of a nitrogen-containing silicon compound in which the nitrogen atom is bonded with a silicon atom through one or more carbon atoms and said nitrogen atom is further bonded directly with said silicon atom or another silicon atom; and (D) 0.05 to 50 parts by weight of a polyoxyalkylene chain-containing compound.