PROCESS FOR PRODUCTION OF CYCLIC POLYORGANOSILOXANE, CURING AGENT, CURABLE COMPOSITION, AND CURED PRODUCT OF THE CURABLE COMPOSITION
申请人:Kaneka Corporation
公开号:EP2216336A1
公开(公告)日:2010-08-11
An object of the invention is to provide a curing agent and a curable composition capable of forming a cured product, which is applicable for optical material and which has excellent heat and light transparency and crack resistance, and a cured product obtained by curing the same. Moreover, an object of the invention is to provide a method for producing with use of the components of the curing agent a cyclic polyorganosiloxane having a specific structure, in a selective manner and in high yield. In order to attain the objects, a curable composition including, as essential components, (A) an organic compound including at least two carbon-carbon double bonds that are reactive with a SiH group, (B) a compound having at least two SiH groups per molecule, and (C) a hydrosilylation catalyst, uses a modified polyorganosiloxane compound having at least two SiH groups per molecule as the compound having at least two SiH groups, which modified polyorganosiloxane compound is a reaction product of a specific cyclic polyorganosiloxane.
本发明的目的是提供一种能够形成固化物的固化剂和固化组合物,该固化剂和固化组合物适用于光学材料,具有优异的耐热性、光透明度和抗裂性,以及通过固化该固化剂和固化组合物得到的固化物。此外,本发明的一个目的是提供一种方法,利用固化剂的组分以选择性的方式高产率地生产具有特定结构的环状聚有机硅氧烷。为了实现上述目的,一种可固化组合物,其基本成分包括:(A) 至少包括两个碳碳双键的有机化合物,这些碳碳双键与 SiH 基团反应;(B) 每分子至少有两个 SiH 基团的化合物;(C) 水硅化催化剂,使用每分子至少有两个 SiH 基团的改性聚有机硅氧烷化合物作为至少有两个 SiH 基团的化合物,该改性聚有机硅氧烷化合物是特定环状聚有机硅氧烷的反应产物。