| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferrite particle-containing polyimide resin capable of producing an electromagnetic wave absorber excellent in electromagnetic wave absorption properties.SOLUTION: When an anhydrous carboxylic acid and a diamine are dissolved in an organic solvent and ferrite particles are dispersed in the organic solvent, a polyamic acid solution wherein the ferrite particles are dispersed is obtained. Then, when heat treatment is carried out on the polyamic acid solution to polymerize the polyamic acid, the polyimide resin, wherein the ferrite particles are dispersed, is obtained. |
