2026-04-19T23:35:46Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/78572023-10-11T00:05:33Zcom_10259_5498com_10259_5086com_10259_2604com_10259_4313col_10259_5499col_10259_4314
Vallejos Calzada, Saúl
567
600
0000-0001-5522-6574
Trigo López, Miriam
556
600
0000-0001-5948-1230
Sardon, Haritz
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600
González Martín, José Manuel
254
600
González Moreno, Sara
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600
0000-0002-7600-0045
García Pérez, José Miguel
213
600
0000-0002-2674-8194
2023-10-10T11:42:06Z
2023-10-10T11:42:06Z
2023-10
0950-0618
http://hdl.handle.net/10259/7857
10.1016/j.conbuildmat.2023.132643
We focused on developing polyurethane (PU) adhesives with superior ambient thermal and hydrolytic stability, a crucial factor for industrial productivity. Our approach involved creating PU prepolymers that can withstand varying temperatures in ambient conditions. These prepolymers consist of conventional isocyanate-terminated polyurethane and metal-free acid:base organic catalysts, with the stability of the adhesive relying on the organocatalyst employed. We tested a series of 11 latent organocatalysts derived from the reaction between 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and various acids. Among these, the catalyst based on 1-naphthoic acid exhibited exceptional stability, lasting at least 3 h at 60 ◦C and an average relative humidity of 65% under vigorous stirring. We assessed this stability using a fan-based stirrer and analyzed the curing conditions kinetically through DSC. Furthermore, our adhesive formulation is environmentally friendly as it is free of metals, specifically tin (typically present in catalysts such as dibutyltin dilaurate). This quality enhances its sustainability. To validate the practical applicability of the adhesives, we conducted tests using decorative facade models composed of siliciclastic sandstone extracted from a quarry in Vilviestre del Pinar (Burgos, Spain. Latitude: 41.951024◦N, longitude: 3.078283◦W) and extruded polystyrene (XPS). The results demonstrated the excellent hydrolytic and thermal stability of the adhesives, highlighting their significant potential for panel manufacturing in this context.
This work was supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union NextGeneration EU PRTR. Author José Miguel García received grant PID2020-113264RB-I00 funded by MCIN/AEI/ 10.13039/501100011033 and by “ERDF A way of making Europe”. Author Miriam Trigo-López received grant PID2019-108583RJ-I00 funded by MCIN/AEI/10.13039/501100011033. Author Saul Vallejos received grant BG22/00086 funded by Spanish Ministerio de Universidades.
application/pdf
eng
Elsevier
Construction and Building Materials. 2023, V. 400, 132643
https://doi.org/10.1016/j.conbuildmat.2023.132643
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113264RB-I00/ES/DISEÑO, SINTESIS Y CARACTERIZACION DE POLIMEROS INTELIGENTES. APLICACION DE SENSORES QUIMICOS POLIMERICOS EN CONTROL Y SEGURIDAD ALIMENTARIA Y EN EL AMBITO SANITARIO/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-108583RJ-I00/ES/POLIAMIDAS AROMATICAS MICRO Y NANOCELULARES REFORZADAS COMO MATERIALES DE ALTAS PRESTACIONES EN APLICACIONES DE SEGURIDAD, PROTECCION Y TRANSPORTE/
info:eu-repo/grantAgreement/MIU/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/BG22%2F00086/ES/
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Siliciclastic sandstone
Single-component polyurethane adhesive
Metal-free catalyst
Colorimetry
RGB parameters
Homemade stability measurement system
DBU
Naphthoic acid
Fan
Facades
Materiales de construcción
Building materials
Metal-free organocatalysts for high hydrolytic stability single component polyurethane adhesives and their application in decorative insulation facades manufacturing
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Construction and Building Materials
400
132643
THUMBNAIL
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Vallejos-cbm_2023.pdf
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2023-10-11 02:05:33.414
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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