| abstract |
The present invention provides novel diamines, polyimide precursors and polyimides using the same. Diamine represented by formula (1) is used. Among them, X 1 and X 5 are each independently a single bond, etc.; X 2 and X 4 are each independently -CH 2 -, etc.; X 3 is an alkylene group with 1 to 6 carbons, etc.; Y 1 and Y 2 are each are independently single bonds or the like; R is a linear, branched or cyclic hydrocarbon group having 1 to 20 carbons; a is 0 or 1). |