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Development of PU Coatings from Neem Oil Based Alkyds Prepared by the Monoglyceride Route

  • Original Paper
  • Published:
Journal of the American Oil Chemists' Society

Abstract

This work deals with the preparation of alkyd resins from neem oil and their utilization in preparation of polyurethane coatings. Alkyd resins were synthesized by reaction of neem oil monoglycerides with four different divalent acids like phthalic anhydride, maleic anhydride, itaconic acid, and dimer fatty acid. The alkyds formation was studied by determining the acid number of the reaction mixture at regular intervals of time and the extents of the polyesterification reactions were calculated during the formation of alkyds. The structures of synthesized alkyds were confirmed by FT-IR and 1H-NMR spectroscopic analysis and also by end group analysis such as hydroxyl and acid values. The synthesized alkyds were reacted with TDI to prepare PU coatings and their performance was compared with PU coatings prepared from a commercial alkyd.

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Abbreviations

PU:

Polyurethane

MG:

Monoglyceride

TDI:

Toluene 2,4-diisocyanate

DBTDL:

Dibutyltin dilaurate

THF:

Tetrahydrofuran

MS:

Mild steel

FT-IR:

Fourier transform infrared

1H NMR:

Proton nuclear magnetic resonance

TMS:

Tetramethyl silane

CDCl3 :

Deuterated chloroform

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Acknowledgments

The authors are thankful to a National Research Foundation of Korea (NFR: 2012M2A2A6035933) grant funded by the Korean government. The authors are also grateful to the University Grants Commission (UGC), Govt. of India, New Delhi for providing financial support.

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Authors and Affiliations

  1. Department of Polymer Chemistry, School of Chemical Sciences, North Maharashtra University, Jalgaon, 425 001, Maharashtra, India

    Ashok Chaudhari, Pramod Mahulikar & Vikas Gite

  2. University Institute of Chemical Technology, North Maharashtra University, Jalgaon, 425 001, Maharashtra, India

    Ravindra Kulkarni

  3. Department of Chemistry, Hanyang University, Seoul Campus, Seoul, South Korea

    Daewon Sohn & Vikas Gite

Authors
  1. Ashok Chaudhari
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  2. Ravindra Kulkarni
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  3. Pramod Mahulikar
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  4. Daewon Sohn
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  5. Vikas Gite
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Corresponding authors

Correspondence to Daewon Sohn or Vikas Gite.

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Chaudhari, A., Kulkarni, R., Mahulikar, P. et al. Development of PU Coatings from Neem Oil Based Alkyds Prepared by the Monoglyceride Route. J Am Oil Chem Soc 92, 733–741 (2015). https://doi.org/10.1007/s11746-015-2642-3

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  • DOI: https://doi.org/10.1007/s11746-015-2642-3

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