Two-part thermocurable polyimide resin composition and cured product thereof

A two-component thermosetting polyimide resin composition comprising:

• a liquid A containing a polyimide (a) which is produced by mixing a tetracarboxylic acid component containing at least one compound selected from a tetracarboxylic dianhydride represented by formula (1), a tetracarboxylic acid and a derivative of the tetracarboxylic acid represented by formula (2), with a polyoxyalkylenediamine represented by formula (3), in such a manner that a number of moles of the polyoxyalkylenediamine is from 1.01 to 2 times the number of moles of the tetracarboxylic acid component, and by being subjected to reaction of the mixture under heating;
• and a liquid B containing a bismaleimide compound represented by formula (4) and a solvent:
• (wherein R1 represents a tetravalent organic group)
• (wherein R1 represents a tetravalent organic group;
• and Y1 to Y4 each independently represent hydrogen or a hydrocarbon group having from 1 to 8 carbon atoms)
• (wherein X1 and X2 each represents a C1 to C4 alkylene group;
• k and m each represent a repeating number of the OX1 unit;
• and 1 represents a repeating number of the OX2 unit, where k+m is a number within a range of from 1 to 90 in terms of number average polymerization degree (provided that m is not 0), and 1 is a number within a range of from 0 to 80 in terms of number average polymerization degree)
• (wherein Z represents a divalent organic group.).