Title

Synthesis and Characterization of a Novel Polyester Resin from Jatropha Seed Oil for Anticorrosive Coatings.

Authors

KUTE, RAVINDRA A.; MHASKE, SHASHANK T.

Abstract

Several polyester resins have been synthesized from conventional and non-conventional seed oils to improve their drying ability, mechanical properties and corrosion protective efficiency. In this study, we have developed a urethane modified polyester (UPE) resin. Polyester (PE) was synthesized by the condensation polymerization reaction of N,N-bis (2 hydroxy ethyl) jatropha oil fatty amide (HEJA) and phthalic anhydride. The UPEA resin was obtained by reacting PE with different percentage of toluene 2,4-diisocynate to improve the coating properties. The structure of the resin was confirmed by FT-IR and 1HNMR spectral analysis techniques. The coating of 60±5 µm thickness was applied on to the surface of mild steel strips by means of a brush. The coating performance of the resin was evaluated by drying time, pencil hardness, specular gloss, scratch hardness and impact resistance. The chemical resistance of UPEA coating was investigated in solvent, acid, alkali and water. The corrosion resistance of the coating was investigated using electrochemical impedance spectroscopy (EIS) and salt spray techniques. The presence of benzene ring and urethane linkages within the resin structure enhances the corrosion resistance, thermal stability and gloss of the Polyester coating.

Subjects

POLYESTERS; JATROPHA; OILSEEDS; CORROSION & anti-corrosives; URETHANE; POLYCONDENSATION; SURFACE coatings

Publication

Journal of Polymer Materials, 2014, Vol 31, Issue 1, p111

ISSN

0973-8622

Publication type

Academic Journal