An object of the present invention is to provide a curable composition which has good curability and good tensile properties (high elongation), and contains a smaller amount of a dibutyltin compound which is regarded as toxic. The curable composition of the present invention comprises the following components (A) and (B) at a weight ratio of (A)/(B) of 25/75 to 75/25, (A) a reactive silyl group-containing organic polymer having, as a silicon-containing group cross-linkable by siloxane bond formation, a group represented by the formula (1): -SiX3, and (B) a reactive silyl group-containing organic polymer having, as a silicon-containing group cross-linkable by siloxane bond formation, a moiety represented by the formula (2):
-O-Rl-CH(CH3)-CH2-Si(R23-a)Xa
- wherein a is 1 or 2.
本发明的目的是提供一种固化组合物,它具有良好的固化性和良好的拉伸性能(高延伸率),并且含有较少量的被认为有毒的二
丁基锡化合物。本发明的可固化组合物由以下组分(A)和(B)组成,(A)/(B)的重量比为 25/75 至 75/25,(A)含活性
硅基的有机聚合物,其含
硅基团可通过
硅氧烷键形成交联,该基团由式(1)表示:-SiX3,以及 (B) 一种含
硅烷基的活性有机聚合物,其含
硅基团可通过形成
硅氧烷键交联,其分子式为 (2):
-O-Rl-CH(
CH3)-
CH2-Si(R23-a)Xa
- 其中 a 为 1 或 2。