n-Dodecylamine was used as reaction terminator to contrel the molecular structures of amine terminated hyperbranched poly(ester-amine)s(HPEA) synthesized from phthalicdiglycol diacrylate and 1-(2-aminoethyl) piperazine at molar ratio of 1：1 by Michael addition reaction．From the 1H-NMR spectra of HPEA．the degree of branching increased and the amino active hydmgen content decreased with prolonging the reaction time．HPEA Were further cured with β-glycidyloxylpropyl trimethoxysilane under ambient condition．The highest gel content and best mechanical properties of the cured coatings at active hydrogen and epoxy group stoichiometrie ratio of 1：1 Can be attributed to-the stepwise curing process

involving the fast reaction between amino active hyarogen and epoxy groups

and the slow hyarelysis and self-condensation of methoxysilane groups．