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Oxygen Inhibition and Coating Thickness Effects on Uv Radiation Curing of Weatherfast Clearcoats Studied by Photo-DSC

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Abstract

Radiation curing is an environmentally-friendly technology. Furthermore, radiation curing is a faster, energy saving and more efficient industrial process than the heat-curable process. One of the most important requirements for the widespread application of UV curable coatings in the coating industry is that they are stable vs. atmospheric degradation. Today's state of the art in oxidative drying and thermosetting coatings is the use of light stabilizers to protect polymers vs. the damage of outdoor exposure. Oxygen has a detrimental effect on the cure response of free radical systems, especially in thin-film coatings. Differential photocalorimetry (photo-DSC) was used to investigate the oxygen effect and the use of light stabilizers on UV curing of photocurable formulations based on acrylate materials. Coating thickness influence was also considered.

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Authors and Affiliations

  1. Instituto de Química, Universidade de Săo Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, 05508-900, Săo Paulo, Brazil E-mail

    C. S. Bentivoglio Ruiz

  2. Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Av. Prof. Lineu Prestes, 2242, Cidade Universitária, 05508-900, Săo Paulo, SP, Brazil

    L. D. B. Machado & E. Segura Pino

  3. Centro de Pesquisa e Desenvolvimento em Telecomunicaçőes, CPqD Telecom and IT Solutions, Rodovia SP 340 km 118,5, 13088-902, Campinas, SP, Brazil

    J. E. Volponi

Authors
  1. C. S. Bentivoglio Ruiz
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  2. L. D. B. Machado
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  3. J. E. Volponi
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  4. E. Segura Pino
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Correspondence to C. S. Bentivoglio Ruiz.

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Bentivoglio Ruiz, C.S., Machado, L.D.B., Volponi, J.E. et al. Oxygen Inhibition and Coating Thickness Effects on Uv Radiation Curing of Weatherfast Clearcoats Studied by Photo-DSC. Journal of Thermal Analysis and Calorimetry 75, 507–512 (2004). https://doi.org/10.1023/B:JTAN.0000027140.27560.d1

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  • DOI: https://doi.org/10.1023/B:JTAN.0000027140.27560.d1

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