Patent ID: 8076439

Claim:
A curable composition which comprises: (A) an organic polymer having a silicon-containing group capable of crosslinking by siloxane bond formation, 0.5 to 5 parts by weight of (B) a silanol condensation catalyst containing an amine compound (B-1) having a melting point lower than 23° C. and optionally, a carboxylic acid metal salt (B-3), per 100 parts by weight of the (A) component and 1 to 10 parts by weight of (C) an adhesion promoter containing an amino group-containing silane coupling agent (C-1) and an epoxy group-containing silane coupling agent (C-2) per 100 parts by weight of the (A) component wherein the (A) component organic polymer is at least one polymer selected from the group consisting of polyoxyalkylene polymers and (meth)acrylate ester polymers wherein the component (B-1) is an amidine compound represented by the general formula (1): R 1 N═CR 2 —NR 3 2 (1) wherein R 1 , R 2 and the two R 3 moieties each independently is a hydrogen atom or a monovalent organic group and any two or more of R 1 , R 2 and the two R 3 moieties may be bound together to form a ring structure and having a melting point of lower than 23° C. the ratio between the number (b3) of moles of the carboxylic acid metal salt (B-3) and the number (b1) of moles of the amine compound (B-1), namely the ratio (b3)/(b1), is 0 to not higher than 0.01 and the ratio between the total number (c1) of moles of the nitrogen atom in the amino group-containing silane coupling agent (C-1) and the total number (c2) of moles of the epoxy group in the epoxy group-containing silane coupling agent (C-2), namely the ratio (c1)/(c2), is not higher than 5.