The present invention relates to a poly(BAMO-carboxylate)-copolyol, a method for preparing the same, and an ETPE binder composition, and more specifically, to a poly(BAMO-carboxylate)-copolyol represented by the following Formula 1 (poly(bis(azidomethyl oxetane)-carboxylate)-copolyol), a preparation method thereof, and an ETPE binder composition comprising the same. [Formula 1] (The Chemical Formula 1 is as defined in claim 1.)
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