Patent attributes
A polyimide excelling in heat resistance, chemical resistance, water repellency, dielectric characteristics, electrical characteristics, and optical characteristics and a polyamide acid useful as the raw material therefor are provided. Specifically, a polyamide acid containing a chlorine atom and a fluorine atom and comprising a repeating unit represented by the following formula (1):(wherein X and X′ independently denote a divalent organic group; Y and Y′ independently denote a chlorine, bromine, or iodine atom; p and p′ denote independently denote the number of fluorine atom {F in the formula (1)} bonded to the relevant benzene ring, representing an integer of 0-3; q and q′ independently denote an integer of 0-3; and p+q total 3, and p′+q′ total 3).
