| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyimide powder composition for imparting excellent fluidity, high packability or the like to polyimide powder, and to provide a molding obtained by using the polyimide powder composition.SOLUTION: The polyimide powder composition, in which a silica fine particle is stuck to the surface of the polyimide powder, is prepared by a method comprising: a step (A1) of obtaining the hydrophilic spherical silica fine particle comprising a SiOunit substantially; a step (A2) of introducing a RSiOunit into the surface of the hydrophilic spherical silica fine particle; and a step (A3) of introducing a RSiOunit to obtain a hydrophobic spherical silica fine particle (1) being the polyimide powder composition. The hydrophobic spherical silica fine particle has 0.005-1.0 μm particle size, 3 or smaller value of a particle size distribution D90/D10 and 0.8-1.0 average degree of circularity. The molding is obtained by using the polyimide powder composition. |
