| Titre : |
Synthesis of waterborne curing agent and its applications in waterborne polyurethane adhesives |
| Type de document : |
texte imprimé |
| Auteurs : |
Guoyan Ma, Auteur ; Le Wang, Auteur ; Chengjun Wang, Auteur ; Weibo Wang, Auteur ; Xi Li, Auteur ; Lu Li, Auteur ; Xiaorong Wang, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 360-364 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Adhésifs en phase aqueuse
Polymères en émulsion
Polyuréthanes
Résistance au pelage
Réticulants -- Synthèse
Réticulation (polymérisation)
Rhéologie
Temps de séchage
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A novel waterborne curing agent (SWCA) is obtained by the reaction of isophorone diisocyanate (IPDI), poly(propylene glycol) (PPG) and pentaerythritol (PE). Different quantities of SWCA were added to a waterborne polyurethane (WPU) to form a SWCA-modified WPU emulsion (SWPU). The structure of SWCA is characterised by attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The effect of SWCA content on the initial tack, peel strength, solvent resistance and curing time are illustrated by T-peel strength, solvent resistance and curing time tests. The rheological properties of SWPU were assessed. The absorption peak at 2263 cm-1 in the ATR-FTIR spectra shows that -NCO groups exist in SWCA. While the content of the curing agent increased from 0% to 4%, the initial strength increased from 1.82 N/mm to 3.87 N/mm; the final peel strength increased from 5.02 N/mm to 7.08 N/mm; and the water and ethanol absorption rate decreased from 11.3% to 6.14% and 15.38% to 11.52%, respectively. The curing time of the SWPU adhesives decreased with increasing curing temperature. The rheological test shows the SWPU emulsion exhibits elastic behaviour. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of waterborne curing - Addition of SXCA to WPU - Characterisation
- RESULTS AND DISCUSSION : ATR-FTIR spectroscopy of the curing agent SWCA and SWPU - Nuclear magnetic resonance spectrum of SWCA - Adhesion properties of WPU with different curing agent content - Effect of SWCA content on the solvent uptake rate of the SWPU films - Curing time of the SWPU adhesive - Rheological behaviour of the SWPU and WPU emulsions
- Table 1 : Curing time of SWPU adhesives with different curing agent content adn different temperature |
| En ligne : |
https://drive.google.com/file/d/1YiG6P8bY-NuiJ7ML0fWPqMtMtiop4JDY/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38297 |
in SURFACE COATINGS INTERNATIONAL > Vol. 105.5 (09-10/2022) . - p. 360-364
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