The present invention provides a curable composition that comprises a polymer (A) containing a cross-linkable silyl group and a condensation catalyst (B). The polymer (A) containing a cross-linkable silyl group is obtained by a process comprising the steps of conducting a radical polymerizable monomer in the presence of a thiocarbonylthio compound. For example, the polymer (A) is obtained by (i) initiating a reversible addition-fragmentation chain transfer polymerization of a radical polymerizable monomer in the presence of a thiocarbonylthio compound, and (ii) adding an unsaturated compound containing a cross-linkable silyl group for copolymerization when a consumed amount of the radical polymerizable monomer by the polymerization has reached a level of 80% or more.
本发明提供了一种可固化组合物,它包括含有可交联
硅基的
聚合物(A)和缩合
催化剂(B)。含有可交联
硅烷基的
聚合物(A)是通过在
硫代
羰基硫代化合物存在下进行自由基聚合单体的步骤得到的。例如,
聚合物(A)是通过以下方法获得的:(i) 在
硫代
羰基硫代化合物存在下,启动可自由基聚合单体的可逆加成-断裂链转移聚合;(ii) 当聚合消耗的可自由基聚合单体量达到 80% 或以上时,加入含有可交联
硅烷基的不饱和化合物进行共聚。