SOLVENT-BASED COATING ARE WIDELY USED FOR PRODUCT PROTECTION BUT ALSO RAISE A GREAT CONCERN OF VOLATILE ORGANIC COMPOUNDS (VOCS).POWDER COATING DOES NOT REQUIRE LIQUID CARRIER TO APPLY THE COATING RESIN TO THE SUBSTRATE, PROVIDING A UNIQUE ALTERNATIVE SOLUTION. POWDER COATING HAS FOUND BROAD APPLICATIONS IN ANTICORROSION OF VESSELS AND PIPES, AND DECORATION FOR AUTOMOBILES. CURRENT POWDER COATINGS ARE ALMOST ENTIRELY DERIVED FROM PETROCHEMICALS, AND IT IS HIGHLY DESIRABLE TO USE RENEWABLE FEEDSTOCKS. LIKE ALL OTHER COATINGS, THE DAMAGED COATING CANNOT BE REPAIRED AND NEED TO BE REMOVED BEFORE APPLYING A NEW ONE.IN THIS PROJECT, WE WILL INVESTIGATE THE PREPARATION OF A NOVEL SELF-HEALABLE EPOXY TYPE POWDER COATING USING RENEWABLE FEEDSTOCKS INCLUDING ROSIN, PLANT OIL AND SUGAR-DERIVE CHEMICALS AS FEEDSTOCKS. OUR APPROACH IS TO DESIGN A UNIQUE SELF-CROSSLINKING HYPERBRANCHED EPOXY PREPOLYMER STRUCTURE FOR PROVIDING A DESIRED RHEOLOGICAL PROPERTY TO COATING POWDER, CATALYST-FREE CURING,AND ACHIEVING THE REPAIRING PROPERTY BY INTRODUCING DYNAMIC COVALENT CHEMISTRY INTO THE CROSSLINKED COATING MATERIALS. MOST OF THERMOSET POWDER COATINGS ARE TWO-PART RESINS AND REPLY ON CATALYSTS FOR ACCELERATING THE CROSSLINKING PROCESS. OURS WILL BE A ONE-PART RESIN THAT CAN GREATLY SIMPLIFY THE MANUFACTURING PROCESS AND REDUCES THE PRODUCTION COST.USE OF BIOBASED THERMOSETS AS ALTERNATIVE COATING POLYMERS IS AN INTEGRAL PART OF THE WHOLE ENDEAVOR REPLACING PETROCHEMICAL POLYMERS WITH BIOBASED ONES, AND IT HAS RECEIVED INCREASING ATTENTION IN RECENT YEARS. OUR PROPOSED RESEARCH IS INTENDED TO FILL THEEXISTING GAPBETWEEN RENEWABLE THERMOSETS AND THEIR APPLICATIONS FOR HIGH-VOLUME POWDER COATING.