Synthesis of Novel Hyperbranched Alkyd Resin from Castor Oil Fatty Amide
Polyol and Application in Polyurethane Coating
Abstract
Abstract A novel hyperbranched alkyd resin has been synthesized using
pyrometallic anhydride and castor oil based fatty amide polyol. The
chemical properties (acid and hydroxyl values) of the synthesized fatty
amide polyol and hyperbranched have been determined. The polyurethanes
obtained from hyperbranched alkyd resins were used for coating
applications on mild steel and wood. The synthesized hyperbranched alkyd
resin was characterized by size exclusion chromatography, NMR, and FTIR.
Performance of cured polyurethane coatings in terms of cross cut
adhesion, impact resistance, gloss, scratch hardness, and chemical
resistance has been studied. The electrochemical properties were studied
by potentiostat. The thermal properties of the coatings were determined
by thermogravemetric analyzer. Surface morphology of coating films was
examined by scanning electron microscopy. Keywords: Hyperbranched alkyd
resin, castor oil, fatty amide polyol, polyurethane, coating