Rapid Underwater Adhesive Utilizing Crosslinker and Amine Catalyst-Filled Microcapsules

Rapidly curing underwater adhesives were tested on untreated substrates and demonstrated high ultimate shear strength. An isocyanate resin was combined with microcapsules containing both a polyol crosslinker and a tertiary amine catalyst. The polyurea microcapsules were synthesized on a large scale...

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Published inACS applied polymer materials Vol. 3; no. 2; pp. 996 - 1002
Main Authors Messersmith, Reid E, Bartlett, Mairead E, Rose, Daniel J, Smith, Douglas A, Patchan, Marcia W, Benkoski, Jason J, Trexler, Morgana M, Hoffman, Christopher M
Format Journal Article
LanguageEnglish
Published American Chemical Society 12.02.2021
Subjects
microcapsules
polyurethane
underwater adhesive
polyurea
interfacial polymerization
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Summary:Rapidly curing underwater adhesives were tested on untreated substrates and demonstrated high ultimate shear strength. An isocyanate resin was combined with microcapsules containing both a polyol crosslinker and a tertiary amine catalyst. The polyurea microcapsules were synthesized on a large scale via an inverse Pickering emulsion utilizing inexpensive reagents. The microcapsules were stable to ambient conditions and gentle mixing but released their contents when appropriate shearing forces were applied. The final polyurethane adhesive achieved high bonding strength (2.88 ± 0.8 MPa) over a short time period (1 min).
ISSN:2637-6105
2637-6105
DOI:10.1021/acsapm.0c01277