Polyimide resin and varnish

Abstract

A polyimide resin contains constituent units represented by the following general formula (1). (In general formula (1), X represents a constituent unit (X) as a divalent organic group, Y represents a constituent unit (Y) as a tetravalent organic group, the aforementioned constituent unit (X) contains a constituent unit (X-1) represented by the following general formula (x1), and the aforementioned constituent unit (Y) contains a constituent unit (Y-1) represented by the following general formula (y1).) (In general formula (x1), R1 independently represents alkyl groups having 1 to 4 carbon atoms, a and b independently represent integers from 0 to 3, and * represents a bond.) (In general formula (y1), R2 independently represents alkyl groups having 1 to 4 carbon atoms, Z1 represents a single bond or a divalent organic group, c and d independently represent integers from 0 to 4, and * represents a bond.) none