The amino blocking reagent 1-isopropyl-3-ethoxy-4-nitro-2-oxo-3-pyrroline and the N-hydroxysuccinimide esters of N-(1-cyclohexyl- and 1-isopropyl-4-nitro-2-oxo-3-pyrrolin-3-yl)glycine. Reagents for the introduction of N-glycyl residues
The present invention provides a polyimide precursor composition comprising an amic acid ester oligomer of Formula (1):
and
a diamine of Formula (2) or (3):
wherein G, P, R, R
x
, P′, D, E and m are as defined herein.
The present invention also provides a dry film containing the polyimide precursor composition, as well as a polyimide film and polyimide laminate prepared from the composition.