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Erschienen in: Journal of Coatings Technology and Research 3/2013

01.05.2013 | Brief Communication

Migration of hindered amine light stabilizers in automotive clearcoats

verfasst von: M. E. Nichols, S. L. Kaberline

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 3/2013

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Abstract

The diffusion behavior of two hindered amine light stabilizers (HALS) [bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)-sebacate and bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-sebacate] in an automotive clearcoat has been quantified via time-of-flight secondary ion mass spectrometry. Diffusion couples made from clearcoats with and without HALS allow for the estimation of the diffusion coefficient of one of the HALS. The high diffusion coefficient of one of the HALS contradicts the presence of HALS gradients in weathered coating systems. This discrepancy is ascribed to a decreasing diffusion coefficient of the HALS in the coating matrix due to a weathering-induced increase in the T g of the clearcoat.

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Metadaten
Titel
Migration of hindered amine light stabilizers in automotive clearcoats
verfasst von
M. E. Nichols
S. L. Kaberline
Publikationsdatum
01.05.2013
Verlag
Springer US
Erschienen in
Journal of Coatings Technology and Research / Ausgabe 3/2013
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-013-9476-4

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