2 results about "ETHYL PYRROLIDONE" patented technology

A method for producing a maleimide resin, the maleimide resin being a maleimide resin obtained by reacting a tetracarboxylic dianhydride (a1), an amine (a2), and maleic anhydride (a3), the method for producing the maleimide resin comprising the steps of: obtaining a polyimide resin by adding the amine (a2) to the tetracarboxylic dianhydride (a1) in the presence of an organic solvent; and obtaining the maleimide resin by adding the maleic anhydride (a3) to the polyimide resin, the organic solvent containing at least one of gamma-butyrolactone and N-ethyl-2-pyrrolidone, the amine (a2) containing a dimer diamine and a second amine other than the dimer diamine.