Aromatic polyimide ester and method for producing thereof

A method for producing an aromatic polyimide ester comprising reacting a compound represented by a following formula (I′),

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• (Y1 represents a hydrogen atom or R1CO— {where R1 represents a hydrocarbon group with carbon numbers of 1 to 4), Z1 represents a hydrogen atom or a hydrocarbon group with carbon numbers of 1 to 4)
• a compound represented by a following formula (II′),
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• (n represents 0 or 1, Y2 represents a hydrogen atom or R2CO— {where R2 represents a hydrocarbon group with a carbon number of 1 to 4}, Y3 represents a hydrogen atom or R3CO— {where R3 represents a hydrocarbon group with carbon numbers of 1 to 4}),
• a compound represented by a following formula (III′),
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• (Z2 and Z3 represent independently a hydrogen atom or a hydrocarbon group with carbon numbers of 1 to 4 respectively, and Z3-O—CO-group is located in para-position or in meta position to Z2-O—CO-group)
• and a compound represented by a following formula (IV′-1), (IV′-2), or (IV′-3).
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• (Y4 represents a hydrogen atom or R4CO— {where R4 represents a hydrocarbon group with carbon numbers of 1 to 4}, Y5 represents a hydrogen atom or R5CO— (where R5, represents a hydrocarbon group with carbon numbers of 1 to 4), and Y4-A-group is located in para-position or in meta position to Y5-A-group.)