| abstract |
The invention relates to a preparation method of an aliphatic ring bridged aromatic diamine monomer, and belongs to the technical field of preparation of diamine monomers for polyimide. The preparation method of the aliphatic ring bridged aromatic diamine monomer of the present invention uses cycloalkyl ketone and amine as raw materials, toluene as an azeotrope, and under the action of perfluorosulfonic acid resin/SiO 2 solid acid catalyst, Carry out nucleophilic reaction and then carry out post-treatment to obtain aliphatic ring bridged aromatic diamine monomer. The invention not only reduces the reaction temperature, shortens the reaction time, improves the reaction yield, but also reduces the toxicity of the post-treatment, reduces the production cost, and has a wide application range. |