Low toxicity solvent compositions for varnishes formulations for use in art conservation

Authors

  • Mariah Boelsums Secretaria de Cultura do Distrito Federal, SDCN Via N2 Anexo do Teatro Nacional - Asa Norte, Brasília - DF, Brasil
  • João Cura D’Ars de Figueiredo Junior Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Pampulha, Belo Horizonte - MG, Brasil
  • Luiz Antônio Cruz Souza Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Pampulha, Belo Horizonte - MG, Brasil

DOI:

https://doi.org/10.14568/cp2020041

Keywords:

Low-toxicity solvent, Varnish, Solubility parameters, Vapour pressure, Viscosity, Gloss

Abstract

Varnishes consist basically of a resin and solvent. Aromatic solvents are widely used for varnish formulations, but they present considerable toxicity which requires their replacement. Two binary solvent systems with an oxygenated solvent (ethyl acetate or isoamyl acetate) and cyclohexane were studied as possible substitutes for xylene in varnish formulations. The toxicity of solvents was analyzed using data from the Globally Harmonized System of Classification and Labeling of Chemicals and the National Institute for Occupational Safety and Health. The solubility of Damar, Paraloid B72, Regalrez 1094, and Laropal K80 resins in these solvents was evaluated by Hansen and Teas Solubility Parameters, sigma profiles, and experimental method. Vapor pressure measurements were obtained from solvents and viscosity and gloss measurements from varnish formulations. The results indicated the potential of binary solvent systems as substitutes for xylene, but require further studies on their effects on pictorial materials on which they are applied.

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References

[1] Cruz, A. J., ‘O risco da arte - A toxicidade dos materiais utilizados na execucao e conservacao das pinturas de cavalete’, in A Conservação e o Restauro do Património - Riscos, Prevenção, Segurança, Ética, Lei, ARP, Lisboa (2002) 27-41, http://www.ciarte.pt/artigos/200202.html.

[2] Ferreira, C. A. R., ‘Controlo de qualidade em tintas e vernizes por espetroscopia de infravermelho proximo’, Dissertacao de mestrado, Departamento de Quimica e Bioquimica, Universidade do Porto, Porto (2014), https://repositorioaberto.up.pt/handle/10216/78324.

[3] Martins, A. L. G., ‘Composicao de vernizes oligomericos para pintura de arte: avaliacao de desempenho em ensaio de envelhecimento artificial acelerado’, Dissertacao de Mestrado, Departamento de Artes Plasticas, Universidade Federal de Minas Gerais, Belo Horizonte (2011).

[4] Motta, E., ‘Vernizes intercalados: usos e virtudes’, Ge-Conservacion 3 (2012) 27-37, https://doi.org/10.37558/gec.v3i0.128.

[5] Mills, J. S; White, R., The Organic Chemistry of Museum Objects, Butterworths, London (1987).

[6] Bailao, A. M. S., ‘Riscos ocupacionais durante a reintegração cromatica’, Estudos de Conservação e Restauro 5 (2014) 31-57, https://doi.org/10.34618/ecr.5.3743.

[7] Patrizi M.G.; Ridolfi S.; Carocci I.; Borgioli L., ‘Tre sculture lignee dorate e policrome: indagini diagnostiche non distruttive ed utilizzo di metodologie e prodotti innovativi a minor impatto ambientale nel rispetto dell’opera, dell’operatore e dell’ambiente’, in VII Congresso Nazionale IGIIC – Lo Stato dell’Arte, Napoli (2009).

[8] Coppola A.; Digennaro G.; Lavenuta G., ‘Confronto tra i comportamenti di materiali tradizionali e di material innovativi utilizzati nelle fasi finali degli interventi di restauro dei dipinti su tela’, in Quinto Congresso Internazionale Colore e Conservazione Materiali e Metodi nel Restauro Delle Opere Policrome Mobili, Trento (2010).

[9] Cremonesi P., ‘Parola d’ordine: Ligroina! (ovvero, considerazioni sull’utilizzo di certi solventi organici)’, Progetto Restauro 24 (2002) 4-16.

[10] Lima, L. A. L., A Química Verde, Centro de Apoio ao Desenvolvimento Tecnologico – Brasilia - CDT/UnB, Brasilia (2012), http://www.respostatecnica.org.br/.

[11] Martins, S., ‘Green solvents’, in Solventes industriais: seleção, formulação e aplicação, ed. P. Garbelotto, Blucher, Rhodia, São Paulo (2007) 63-93.

[12] Leite, A. C.; Marra, F., ‘Panorama: Mercado de Solventes Industriais’, in Solventes industriais: seleção, formulação e aplicação, ed. P. Garbelotto, Blucher, Rhodia, Sao Paulo (2007) 1-18.

[13] Burke, J., ‘Solubility parameters: theory and application’, in The Book and Paper Group Annual vol. 3 (1984), https://cool.culturalheritage.org/coolaic/sg/bpg/annual/v03/bp03-04.html.

[14] Welker R. W., ‘Basics and sampling of particles for size analysis and identification’, in Developments in Surface Contamination and Cleaning: Detection, Characterization, and Analysis of Contaminants, ed. Kohli R., Mittal K. L., William Andrew (2012) 1-80, https://doi.org/10.1016/B978-1-4377-7883-0.00001-8.

[15] Rios, M. D.; Ramos, E. H., ‘Determination of the Hansen solubility parameters and the Hansen sphere radius with the aid of the solver add-in of Microsoft Excel’, SN Applied Sciences 2(676) (2020), https://doi.org/10.1007/s42452-020-2512-y.

[16] Mullins, E.; Liu, Y. A.; Ghaderi, A.; Fast, S. D., ‘Sigma profile database for predicting solid solubility in pure and mixed solvent mixtures for organic pharmacological compounds with COSMO-based thermodynamic methods’, Industrial & Engineering Chemistry Research 47(5) (2008) 1707-1725, https://doi.org/10.1021/ie0711022.

[17] Gerber, R. P., ‘Modelo COSMO-SAC como ferramenta de Engenharia Quimica’, Trabalho de Conclusao de Curso, Engenharia Quimica, Universidade Federal do Rio Grande do Sul, Porto Alegre (2010), https://www.lume.ufrgs.br/handle/10183/35202.

[18] Rie, E. R., ‘The influence of varnishes on the appearance of paintings’, Studies in Conservation 32(1) (1987) 1-13, https://doi.org/10.1179/sic.1987.32.1.1.

[19] Delaney, J. K.; Rie, E. R.; Elias, M.; Sung, L.; Morales, K. M., ‘The Role of Varnishes in Modifying Light Reflection from Rough Surfaces - A Study of Changes in Light Scattering Caused by Variations in Varnish Topography and Development of a Drying Model’, Studies in Conservation 53(3) (2008) 170-186, https://doi.org/10.1179/sic.2008.53.3.170.

[20] Rie, E. R.; Delaney, J. K.; Morales, K. M.; Maines, C. A.; Sung, L., ‘Modification of Surface Roughness by Various Varnishes and Effect on Light Reflection’, Studies in Conservation 55(2) (2010) 134-143, https://doi.org/10.1179/sic.2010.55.2.134.

[21] Gerber, R. P.; Soares, R. P., ‘Prediction of infinite-dilution activity coefficients using UNIFAC and COSMO-SAC variants’, Industrial & Engineering Chemistry Research 49(16) (2010) 7488-7496, https://doi.org/10.1021/ie901947m.

[22] Ehlert, A. P. R., ‘Estudo da Solubilidade dos Asfaltenos Utilizando o Modelo COSMO-SAC’, Trabalho de Conclusao de Curso, Engenharia Quimica, Universidade Federal do Rio Grande do Sul, Porto Alegre (2019), https://www.lume.ufrgs.br/handle/10183/200439.

[23] Stavroudis, C.; Blank, S., ‘Solvents & sensibility’, WAAC Newsletter 11(2) (1989) 2-10, https://cool.culturalheritage.org/waac/wn/wn11/wn11-2/wn11-202.html.

[24] Babu, P. R. S.; Subrahmanyam C. V. S.; Thimmasetty, J.; Manavalan, R.; Valliappan, K., ‘Extended Hansen's solubility approach: meloxicam in individual solvents’, Pakistan Journal of Pharmaceutical Sciences 20(4) (2007) 311‐316, https://pubmed.ncbi.nlm.nih.gov/17604255/.

[25] Fardi, T.; Stefanis, E.; Panayiotou, C.; Abbott, S.; Loon, S., ‘Artwork conservation materials and Hansen solubility parameters: A novel methodology towards critical solvent selection’, Journal of Cultural Heritage 15(6) (2014) 583-594, https://doi.org/10.1016/j.culher.2013.11.006.

[26] Atkins, P. W., Physical chemistry, 6. ed., Oxford University, Oxford (1998).

[27] NIIR Board, Modern Technology of Paints, Varnishes & Lacquers, 2. ed., Asia Pacific Business, Delhi (2007).

[28] Vincentin, D. J.; Rodrigues, E. L.; Martins, S., ‘Solventes e suas Aplicacoes’, in Solventes industriais: seleção, formulação e aplicação, ed. P. Garbelotto, Blucher, Rhodia, Sao Paulo (2007) 183-307.

Published

2021-05-31

How to Cite

Boelsums, M., de Figueiredo Junior, J. C. D., & Cruz Souza, L. A. (2021). Low toxicity solvent compositions for varnishes formulations for use in art conservation. Conservar Património, 37, 69–79. https://doi.org/10.14568/cp2020041

Issue

Section

Articles