Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones

Harling, Steffen; Meola, Giuseppe; Schaible, Stefan; Schulthess, Adrian; Brändli, Christof; Meincke, Olaf

doi:10.1016/j.ijadhadh.2013.05.012

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones
Authors:	Harling, Steffen Meola, Giuseppe Schaible, Stefan Schulthess, Adrian Brändli, Christof Meincke, Olaf
DOI:	10.1016/j.ijadhadh.2013.05.012
Published in:	International Journal of Adhesion and Adhesives
Volume(Issue):	46
Page(s):	26
Pages to:	33
Issue Date:	2013
Publisher / Ed. Institution:	Elsevier
ISSN:	0143-7496 1879-0127
Language:	English
Subjects:	Adhesive formulation
Subject (DDC):	660: Chemical engineering
Abstract:	This study deals with the key raw material of many latent reactive polyurethane adhesives and describes the reaction of a crystalline isocyanate compound, toluenediisocyanate-uretdione (TDI-U), with a polyol matrix, e.g. polycaprolactone (PCL). Mixtures of these compounds (PCL:TDI-U with molar ratio 2:1) were investigated under isothermal and dynamic conditions with rheology, differential scanning calorimetry (DSC) and infrared spectroscopy (IR). Isothermal measurements at 80°C showed that the solvation of TDI-U is followed after 16min by the polyurethane formation. Isotherm storages at 40 and 60°C and the DSC analysis according to Kissinger [1] yield in an activation energy Ea of the reaction of the free NCO-groups of the TDI-U with the OH-groups of the PCL of about 85kJ/mol. The formed polyurethane contains uretdione rings, which are opened at temperatures higher than 150°C. The solvation process of the TDI-U seems to be an important parameter in order to control and analyse latent reactive systems and has to be investigated in further studies.
URI:	https://digitalcollection.zhaw.ch/handle/11475/8734
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Materials and Process Engineering (IMPE)
Appears in collections:	Publikationen School of Engineering

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Harling, S., Meola, G., Schaible, S., Schulthess, A., Brändli, C., & Meincke, O. (2013). Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones. International Journal of Adhesion and Adhesives, 46, 26–33. https://doi.org/10.1016/j.ijadhadh.2013.05.012

Harling, S. et al. (2013) ‘Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones’, International Journal of Adhesion and Adhesives, 46, pp. 26–33. Available at: https://doi.org/10.1016/j.ijadhadh.2013.05.012.

S. Harling, G. Meola, S. Schaible, A. Schulthess, C. Brändli, and O. Meincke, “Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones,” International Journal of Adhesion and Adhesives, vol. 46, pp. 26–33, 2013, doi: 10.1016/j.ijadhadh.2013.05.012.

HARLING, Steffen, Giuseppe MEOLA, Stefan SCHAIBLE, Adrian SCHULTHESS, Christof BRÄNDLI und Olaf MEINCKE, 2013. Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones. International Journal of Adhesion and Adhesives. 2013. Bd. 46, S. 26–33. DOI 10.1016/j.ijadhadh.2013.05.012

Harling, Steffen, Giuseppe Meola, Stefan Schaible, Adrian Schulthess, Christof Brändli, and Olaf Meincke. 2013. “Latent Reactive Polyurethanes Based on Toluenediisocyanate-Uretdione and Polycaprolactones.” International Journal of Adhesion and Adhesives 46: 26–33. https://doi.org/10.1016/j.ijadhadh.2013.05.012.

Harling, Steffen, et al. “Latent Reactive Polyurethanes Based on Toluenediisocyanate-Uretdione and Polycaprolactones.” International Journal of Adhesion and Adhesives, vol. 46, 2013, pp. 26–33, https://doi.org/10.1016/j.ijadhadh.2013.05.012.