Development of ion exchange purification for advanced materials contain siloxane polymer

摘要

The purification method to produce highly pure products containing siloxane polymer was developed. Siloxane polymer can be difficult to be purified without changing its property because of its high reactivity. Of various methods, ion exchange is well known as a useful method for a purification. However, resins with cation or anion exchange groups used in the purification process can promote hydrolysis and dehydration condensation reaction of siloxane polymer. That is why the method had not been used for the purification of siloxane polymer. In this study, conditions of the ion exchange method were reviewed. As a result, it was found that using strongly acidic cation exchange resins with gel structure is a proper condition. And also simulation models of the polymerization of siloxane polymer and the ion exchange reaction were applied to the purification process. By using these simulations, process parameters of the purification such as process time forion exchange can beoptimized.