Patent ID: 6939925

Claim:
A room-temperature curable organopolysiloxane composition comprising: (I) 100 parts by weight of an organopolysiloxane that is a condensation reaction product of 100 parts by weight of a component (A) described below, and from 1 to 200 parts by weight of a component (B) described below, (A) an organopolysiloxane which comprises from R 3 SiO 1/2 units (wherein, each R represents, independently, an unsubstituted or substituted monovalent hydrocarbon group of 1 to 6 carbon atoms) and SiO 4/2 units, in which a number of mols of said R 3 SiO 1/2 units relative to 1 mol of said SiO 4/2 units is from 0.6 to 1.2 mols, and which further comprises both R 2 SiO 2/2 units and RSiO 3/2 units (wherein in each formula, R is as defined above), and the quantities of both of the R 2 SiO 2/2 units and RSiO 3/2 units are each within a range from 0.2 to 0.8 mols relative to 1 mol of said SiO 4/2 units, and moreover comprises less then 2.0% by weight of hydroxyl groups bonded to silicon atoms, (B) a diorganopolysiloxane with molecular chain terminals blocked with functional group-containing silyl groups; and (II) from 0.1 to 30 parts by weight of a silane compound containing two or more hydrolysable groups bonded to silicon atoms within one molecule, and/or a partial hydrolysis-condensation product thereof.