| abstract |
The present disclosure provides a polyamine solution capable of suppressing the yellowing of a cast film in one aspect. In one or more embodiments, the present invention relates to a polyamine solution containing an aromatic polyamine and a solvent, wherein the aromatic polyamine contains a constituent unit having one or more free carboxyl groups, and has an aromatic ring in the main chain. Structure and alicyclic structure. The present invention relates to a laminated composite material comprising a glass plate and a polyamide resin layer, wherein a polyimide resin layer is laminated on one side of the glass plate, and a yellowness of the polyimide resin layer (JIS) K7373) is 2.4 or less, and is obtained by coating the above polyamine solution on a glass plate. |