Curable composition

A curable composition which comprises:

• (A) an organic polymer containing a silicon-containing group capable of crosslinking by siloxane bond formation and
• (B) a silanol condensation catalyst
• wherein the silanol condensation catalyst is an amine compound and
• an aqueous solution prepared by adding 5 millimoles of the amine compound to 100 g of a mixed solvent composed of isopropyl alcohol and water in a weight ratio of 10:3 has a pH value of not lower than 13.4 as measured at 23° C. according to JIS Z 8802,
• wherein the component (A) is at least one polymer selected from the group consisting of polyoxyalkylene polymers, saturated hydrocarbon polymers and (meth)acrylate ester polymers, and
• wherein the amine compound is at least one member selected from the group consisting of an amidine compound, a guanidine compound and a biguanide compound, and
• wherein the amidine compound is represented by the general formula (1):
• R1N═CR2—NR32 (1)
• wherein R1, R2 and the two R3 moieties each independently is a hydrogen atom or a monovalent organic group and any two or more of R1, R2 and the two R3 moieties are bound together to form a ring structure, and
• the guanidine compound is at least one member selected from the group consisting of 1-methylguanidine, 1-n-butylguanidine, 1,1-dimethylguanidine, 1,1-diethylguanidine, 1,1,2-trimethylguanidine, 1,2,3-trimethylguanidine, 1,1,2,3,3-pentamethylguanidine, 2-ethyl-1,1,3,3-tetramethylguanidine, 1,1,3,3-tetramethyl-2-n-propylguanidine, 1,1,3,3-tetramethyl-2-isopropylguanidine, 2-n-butyl-1,1,3,3-tetramethylguanidine, 2-tert-butyl-1,1,3,3-tetramethylguanidine, 1,2,3-tricyclohexylguanidine, 7 -methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7 -ethyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-n-propyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-isopropyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-n-butyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-isobutyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-tert-butyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7 -cyclohexyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-n-octyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene, 7-2-ethylhexyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene and 7-decyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene.