Coatings prepared from waterborne polyurethane dispersions obtained with polycarbonates of 1,6-hexanediol of different molecular weights

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Título: Coatings prepared from waterborne polyurethane dispersions obtained with polycarbonates of 1,6-hexanediol of different molecular weights
Autor/es: García Pacios, Vanesa | Jofre-Reche, José Antonio | Costa, Víctor | Colera, Manuel | Martín-Martínez, José Miguel
Grupo/s de investigación o GITE: Adhesión y Adhesivos
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Inorgánica
Palabras clave: Waterborne polyurethane dispersion | Polyurethane coatings | Coatings properties
Área/s de conocimiento: Química Inorgánica
Fecha de publicación: oct-2013
Editor: Elsevier
Cita bibliográfica: Progress in Organic Coatings. 2013, 76(10): 1484-1493. doi:10.1016/j.porgcoat.2013.06.005
Resumen: Waterborne polyurethane dispersions (PUDs) were synthesized with polycarbonates of 1,6-hexanediol of different molecular weight (500–3000 Da) and their properties, adhesion (Hatch adhesion) and coatings on stainless steel properties (Pencil hardness, Persoz hardness, gloss at 60°, chemical resistance, yellowness index) were characterized. The hatch adhesion of the polyurethane coatings to stainless steel was very good and decreased slightly by increasing the molecular weight of the polycarbonate of 1,6-hexanediol. Both the Pencil and Persoz hardness values of the coatings increased by increasing the hard segments content in the polyurethane, i.e. by decreasing the molecular weight of the polycarbonate of 1,6-hexanediol, whereas the gloss and the yellowness index were lower for the coatings obtained with the polycarbonate of 1,6-hexanediol of molecular weight of 500 Da. Very good chemical resistance against ethanol for all polyurethane coatings on stainless steel plates was obtained but for long time of ethanol in contact with the coating surface the chemical resistance decreased, more markedly for the polyurethane coating obtained with the polycarbonate of 1,6-hexanediol of higher molecular weight. In summary, the segmented structure of the waterborne polyurethane dispersion determined the properties of the polyurethane coatings obtained from them.
Patrocinador/es: Financial support by UBE Chemical Europe, S.A.
URI: http://hdl.handle.net/10045/37882
ISSN: 0300-9440 (Print) | 1873-331X (Online)
DOI: 10.1016/j.porgcoat.2013.06.005
Idioma: eng
Tipo: info:eu-repo/semantics/article
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1016/j.porgcoat.2013.06.005
Aparece en las colecciones:INV - LAA - Artículos de Revistas

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