Polyamide imide insulating paint and preparation method thereof

The invention designs a polyamide imide insulating paint, which is characterized by comprising 100-120 parts by weight of polyamide imide solution and 2-5 parts by weight of montmorillonite material, wherein the polyamide imide solution mainly comprises the following components in parts by weight: 20-35 parts of polyamide imide resin and 20-60 parts of organic solvent, and the organic solvent is one or more of N-methyl pyrrolidone, chlorobenzene, bromobenzene, dichlorobenzene, dibromobenzene,1-tetralone, fenchone, phorone and isophorone; and the montmorillonite material mainly comprises montmorillonite. According to the invention, the polyamide imide insulating enamelled wire forms a homogeneous and stable system, has the surface friction coefficient below 0.30 and indexes satisfying standard requirements of international electrotechnical commission (IEC), and is particularly suitable to be used as enamelled wire insulating paint for coating the surface of a copper wire.