| abstract |
[Purpose] Polyimide fiber having excellent mechanical strength and heat resistance, flame retardancy and low dielectric constant, which can be plated, non-woven fabric obtained from the fiber, and heat insulating material, electromagnetic wave shielding sheet and battery using these Providing a separator. A silane-modified polyamic acid containing an alkoxy group-containing silane-modified polyamic acid (a) and a polar solvent (b) obtained by reacting a polyamic acid (1) with an epoxy group-containing alkoxysilane partial condensate (2). It is a polyimide fiber obtained by spinning and curing the resin composition (A). [Selection figure] None |