A method for producing a ladder-type polysilsesquioxane having a phosphonic acid group and a phosphonate group in a side chain, a ladder-type polysilsesquioxane laminate, and a ladder-type polysilsesquioxane laminate.

摘要

A ladder-type polysilsesquioxane is represented by formula 1 or formula 2. In formula 1 and formula 2, R1 represents an alkylene group having 1 to 6 carbon atoms, and n represents a positive real number. In formula 2, X represents an alkali metal cation, an alkali earth metal cation, an ammonium cation or an imidazolium cation.