Patent ID: 7709588

Claim:
A curable composition which comprises a polymer (P) having polyoxyalkylene formed by ring-opening polymerization of a C 2-6 alkylene oxide and a group of the following formula (1), and a compound (S) having the following formula (S1), and which contains from 0.01 to 0.50 part by mass of the compound (S) per 100 parts by mass of the polymer (P): —Si(—X 1 ) 3 (1) Si(—X 2 ) m (—Y 2 ) 3-m (-Q M -SH) (S1) wherein symbols have the following meanings: X 1 and X 2 : each independently a C 1-6 alkoxy group, Y 2 : a C 1-6 alkyl group, m: 1, 2 or 3, and Q M : a C 1-20 divalent organic group, and wherein the polymer (P) has a number average molecular weight (Mn) of from 5,000 to 30,000 and a molecular weight distribution (Mw/Mn) of at most 3.0.