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A shellac derivative in thermoset coatings

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Abstract

Shellac, a naturally occurring product obtained from insects, was modified by reaction with t-butylacetoacetate. Analysis of the acetoacetylated material via NMR and elemental analysis showed that 60–80% of the available reactive moieties of shellac had been converted to ester. Crosslinked films were produced by reacting the acetoacetylated shellac with a multifunctional amine or with a multifunctional acrylate under Michael addition conditions. The films had good properties in terms of solvent resistance, hardness, and gloss, but proved to be somewhat brittle.

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References

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Authors and Affiliations

  1. BASF, 1609 Biddle Avenue, Wyandotte , MI, 48192, USA

    Jennifer T. Otto & David L. Trumbo

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  1. Jennifer T. Otto
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  2. David L. Trumbo
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Correspondence to David L. Trumbo.

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Otto, J.T., Trumbo, D.L. A shellac derivative in thermoset coatings. J Coat Technol Res 7, 525–527 (2010). https://doi.org/10.1007/s11998-010-9240-y

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  • DOI: https://doi.org/10.1007/s11998-010-9240-y

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