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Epoxy thiol photolatent base clearcoats: curing and formulation

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Abstract

Photolatent base crosslinked epoxy thiol coatings were characterized using transmission FTIR spectroscopy, Raman spectroscopy, UV spectroscopy, and Vickers micro-hardness testing. Curing rate constants were calculated for a series of formulations with varying concentrations of photolatent-DBN, ITX (2-isopropyl thioxanthone), and BP (benzophenone), as well as varying curing times. A design of experiments demonstrated that increased UV dose had the greatest impact on increasing the curing rate of the clearcoat system. BP wt% proved to have little impact on the clearcoat curing rate, while PL-DBN and ITX exhibited minimal improvement above 2.5 wt% and 1 wt%, respectively. Vickers micro-hardness results showed that irradiation dose had no impact on the final physical properties of the clearcoat. However, a 24-h ambient post-cure proved to increase the final hardness of the clearcoat under some conditions.

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References

  1. Zhang, H, Cattaneo, M, Li Bassi, G, “Zero VOC Coatings Cured by Sunlight.” J. Coat. Technol., 72 (903) 77–79 (2000)

    Article  CAS  Google Scholar 

  2. Jung, T, Valet, A, “Scratch Resistance and Weatherfastness of UV-curable Clearcoats.” Macromol. Symp., 187 531–542 (2002)

    Article  CAS  Google Scholar 

  3. Koleske, JV, Radiation Curing of Coatings. ASTM International, West Conshohocken, PA (2002)

    Book  Google Scholar 

  4. Evans, DC, Lancaster, JK, “The Wear of Polymers.” Treat. Mater. Sci. Tech., 13 85–139 (1979)

    CAS  Google Scholar 

  5. Hoyle, CE, Kinstle, JF, Radiation Curing of Polymeric Materials. American Chemical Society, Washington, DC (1990)

    Book  Google Scholar 

  6. Riegel, ER, Kent, JA, Riegel’s Handbook of Industrial Chemistry. Springer, New York (2003)

    Google Scholar 

  7. Dietliker, K, Huesler, R, Birbaum, J-L, Ilg, S, Villeneuve, S, Studer, K, Jung, T, Benkhoff, J, Kura, H, Matsumoto, A, Oka, H, “Advancements in Photoinitiators-Opening up New Applications for Radiation Curing.” Prog. Org. Coat., 58 (2–3) 146–157 (2007)

    Article  CAS  Google Scholar 

  8. Studer, K., et al., Photolatent Bases: New Catalysts for UV-Curing of Coatings, Radtech e|5: UV & EB Technology Conference 2006 Proceedings

  9. Dogan, N, Klinkenberg, H, Reinerie, L, Ruigrok, D, Wijnands, P, Dietliker, K, Misteli, K, Jung, T, Studer, K, Contich, P, Benkhoff, J, Sitzmann, E, “Fast UV-A Curable Clearcoat.” RadTech Report, 20 (2) 43–52 (2006)

    CAS  Google Scholar 

  10. Noomen, A, “Application of Michael Addition Chemistry in Coatings Chemistry.” Prog. Org. Coat., 32 137–142 (1997)

    Article  CAS  Google Scholar 

  11. Nichols, ME, Seubert, CM, Weber, WH, Gerlock, JL, “A Simple Raman Technique to Measure the Degree of Cure in UV-Curable Coatings.” Prog. Org. Coat., 43 226–232 (2001)

    Article  CAS  Google Scholar 

  12. Roy, RK, Design of Experiments Using the Taguchi Approach: 16 Steps to Product and Process Improvement. Wiley, New York (2001)

    Google Scholar 

  13. Peace, GS, Taguchi Methods a Hands-on Approach. Addison-Wesley, Reading, MA (1993)

    Google Scholar 

  14. Hiemenz, PC, Polymer Chemistry, pp. 282–292. Marcel Dekker, Inc., New York, NY (1984)

    Google Scholar 

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Acknowledgments

The authors thank Eugene Sitzmann and Kurt Dietliker for providing select raw materials needed for this study while also providing technical consultation. The authors would like to thank Cindy Peters for her assistance in collecting the UV transmission spectra of the clearcoat films used in this study.

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Authors and Affiliations

  1. Ford Motor Company, Dearborn, MI, USA

    Christopher M. Seubert & Mark E. Nichols

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  1. Christopher M. Seubert
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  2. Mark E. Nichols
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Correspondence to Christopher M. Seubert.

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Seubert, C.M., Nichols, M.E. Epoxy thiol photolatent base clearcoats: curing and formulation. J Coat Technol Res 7, 615–622 (2010). https://doi.org/10.1007/s11998-010-9248-3

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