Curable composition and cured article obtained therefrom

A curable composition, comprising:

• 100 parts by weight of a reactive silyl group-containing organic polymer (A);
• and
• 0.1 to 20 parts by weight of a compound (B) having 2 to 10 ethyloxy groups and no amino group,
• the organic polymer (A) having at a molecular chain end a reactive silyl group represented by formula (1):
• —W—CH2—SiR1aR2bXc (1)
• wherein R1 is a C1-C20 hydrocarbon group in which at least one hydrogen atom on carbon atoms at positions 1 to 3 is replaced with a group selected from the group consisting of a halogen atom, —OR3, —NR4R5, —N═R6, —SR′, a C1-C20 perfluoroalkyl group, and a cyano group, wherein R3, R4, R5, and R7 are each a hydrogen atom or a C1-C20 monovalent substituted or unsubstituted hydrocarbon group, and R6 is a C1-C20 divalent substituted or unsubstituted hydrocarbon group;
• R2 is a C1-C20 hydrocarbon group, a C6-C20 aryl group, a C7-C20 aralkyl group, or a triorganosiloxy group represented by R03SiO— wherein the three R0's are C1-C20 hydrocarbon groups and may be the same as or different from each other;
• X is a hydroxy group or a hydrolyzable group;
• W is a linking group selected from the group consisting of —O—R8—, —O—CO— N(R9)—, —N(R9)—CO—O—, —N(R9)—CO—N(R9)—, —S—CO—NH—, and —NH—CO—S—, wherein R8 is a C1-C8 divalent hydrocarbon group, and R9 is hydrogen, an optionally halogen-substituted cyclic, linear, or branched C1-C18 alkyl or alkenyl group, or a C6-C18 aryl group;
• when W is —O—R8—, a is 1 or 2, b is 0 or 1, c is 1 or 2, and a+b+c=3;
• when W is not —O—R8—, a is 0, 1, or 2, b is 0, 1 or 2, c is 1, 2, or 3, and a+b+c=3;
• and each occurrence of R1, R2, X, W, or R9 may be the same or different,
• the compound (B) being a C1-C20 saturated hydrocarbon having one alkoxysilyl group, a C1-C20 hydrocarbon having two or more alkoxysilyl groups, or a C1-C20 polycarboxylic acid ester.