UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings

Waterborne polyurethane dispersions (WPUs) are environmentally friendly coatings since they present low amount of volatile organic compound amounts (VOCs). In the majority of the WPUs the dispersions are balanced with anionic groups and accordingly their stability at low pH is limited. In order to t...

Descripción completa

Detalles Bibliográficos
Autores: Puyadena Jauregi, Maddalen, Pajares García, Erika, Martín Alberdi, María Dolores, Barrio, C., González Vives, Alba, Irusta Maritxalar, María Lourdes
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/66698
Acceso en línea:http://hdl.handle.net/10810/66698
Access Level:acceso abierto
Palabra clave:UV curable acrylic end-capped waterborne polyurethanes
amphoteric stabilisation
dispersion stability
id ES_c93e95f73dff617bc88ce2cd6ceb3443
oai_identifier_str oai:addi.ehu.eus:10810/66698
network_acronym_str ES
network_name_str España
repository_id_str
spelling UV-curable acrylic end-capped amphoteric waterborne polyurethane coatingsPuyadena Jauregi, MaddalenPajares García, ErikaMartín Alberdi, María DoloresBarrio, C.González Vives, AlbaIrusta Maritxalar, María LourdesUV curable acrylic end-capped waterborne polyurethanesamphoteric stabilisationdispersion stabilityWaterborne polyurethane dispersions (WPUs) are environmentally friendly coatings since they present low amount of volatile organic compound amounts (VOCs). In the majority of the WPUs the dispersions are balanced with anionic groups and accordingly their stability at low pH is limited. In order to this drawback to be solved, in this work a tertiary amine containing chain extender (triethanolamine, TEOA) was introduced together with a conventional internal emulsifier (carboxylic acid) in acrylic end-capped polyurethane dispersions giving rise to amphoteric UV curable WPUs. After adding a radical photo-initiator and film formation, the coatings were cured under UV irradiation. The properties of amphoteric and anionic dispersions were compared. The best properties were obtained for the samples containing a 1/1 amine/acid molar ratio. Thus, while the anionic dispersions coagulated at low pH values, the 1/1 amphoteric dispersion showed high stability to pH changes. After curing this sample with UV irradiation, the gel content of the film was higher and the water vapour transmission rate was lower than that of the anionic polyurethane because of the strong acid/base interaction. The results showed that the amphoteric WPUs are promising for various applications, offering stability over a wider pH range than traditional formulations.The University of the Basque Country (UPV/EHU) predoctoral grant of M. Puyadena and the funding by the Basque Government through grant IT1667-22 are gratefully acknowledged. Technical and human support provided by SGIker is also sincerely acknowledged (UPV/EHU/ERDF, EU).Elsevier202420242024info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/66698reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoIngléshttps://www.sciencedirect.com/science/article/pii/S0300944024000213info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/3.0/es/© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/).Atribución-NoComercial-SinDerivadas 3.0 Españaoai:addi.ehu.eus:10810/666982026-06-18T09:23:17Z
dc.title.none.fl_str_mv UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
title UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
spellingShingle UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
Puyadena Jauregi, Maddalen
UV curable acrylic end-capped waterborne polyurethanes
amphoteric stabilisation
dispersion stability
title_short UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
title_full UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
title_fullStr UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
title_full_unstemmed UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
title_sort UV-curable acrylic end-capped amphoteric waterborne polyurethane coatings
dc.creator.none.fl_str_mv Puyadena Jauregi, Maddalen
Pajares García, Erika
Martín Alberdi, María Dolores
Barrio, C.
González Vives, Alba
Irusta Maritxalar, María Lourdes
author Puyadena Jauregi, Maddalen
author_facet Puyadena Jauregi, Maddalen
Pajares García, Erika
Martín Alberdi, María Dolores
Barrio, C.
González Vives, Alba
Irusta Maritxalar, María Lourdes
author_role author
author2 Pajares García, Erika
Martín Alberdi, María Dolores
Barrio, C.
González Vives, Alba
Irusta Maritxalar, María Lourdes
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv UV curable acrylic end-capped waterborne polyurethanes
amphoteric stabilisation
dispersion stability
topic UV curable acrylic end-capped waterborne polyurethanes
amphoteric stabilisation
dispersion stability
description Waterborne polyurethane dispersions (WPUs) are environmentally friendly coatings since they present low amount of volatile organic compound amounts (VOCs). In the majority of the WPUs the dispersions are balanced with anionic groups and accordingly their stability at low pH is limited. In order to this drawback to be solved, in this work a tertiary amine containing chain extender (triethanolamine, TEOA) was introduced together with a conventional internal emulsifier (carboxylic acid) in acrylic end-capped polyurethane dispersions giving rise to amphoteric UV curable WPUs. After adding a radical photo-initiator and film formation, the coatings were cured under UV irradiation. The properties of amphoteric and anionic dispersions were compared. The best properties were obtained for the samples containing a 1/1 amine/acid molar ratio. Thus, while the anionic dispersions coagulated at low pH values, the 1/1 amphoteric dispersion showed high stability to pH changes. After curing this sample with UV irradiation, the gel content of the film was higher and the water vapour transmission rate was lower than that of the anionic polyurethane because of the strong acid/base interaction. The results showed that the amphoteric WPUs are promising for various applications, offering stability over a wider pH range than traditional formulations.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/66698
url http://hdl.handle.net/10810/66698
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0300944024000213
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Atribución-NoComercial-SinDerivadas 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Atribución-NoComercial-SinDerivadas 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869419354514259969
score 15,300724

Similares en LA Referencia