Hyperbranched poly(beta amino ester) (HPAE) with abundant catechol groups was prepared through a dynamically controllable "A2 + B4 " polycondensation. A strong adhesive hydrogel formed by the crosslink of HPAE with poly(ethylene imine) (PEI) at 25 ? without any external trigger can firmly adhere to metals, plastics, inorganic nonmetallic materials, and wood. Meanwhile, the HPAE/PEI adhesive exhibits excellent antibacterial properties and can be thoroughly and quickly erased by spraying ethanol.
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