Preparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification / Kunpeng Lou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 907-923 Titre : Preparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification Type de document : texte imprimé Auteurs : Kunpeng Lou, Auteur ; Siliang Li, Auteur ; Yang Cao, Auteur ; Menghang Li, Auteur ; Xiaoxuan Zou, Auteur ; Bo Jing, Auteur Année de publication : 2024 Article en page(s) : p. 907-923 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Emulsification Granulométrie Haut extrait sec Polymères en émulsion Polyuréthanes Revêtements en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, waterborne polyurethane (WPU-SL) with high solid content and low viscosity was successfully prepared by compounding large particle size emulsion (WPU-L) with a variety of small particle size emulsions (WPU-S) by investigating the effects of small particle size type, particle size ratio, and volume ratio on the emulsion properties. A series of characterization techniques of the waterborne polyurethane was carried out by FTIR, DSC, contact angle, viscometer, particle size meter, and universal testing machine. The results show that the WPU-L/WPU-S = 5/1 emulsion has a high solid content, good emulsion stability, and excellent coating film properties. When WPU-S1 and WPU-S3, two small particle size emulsions with a particle size ratio of 2.45 and 3.79, were emulsified with WPU-L, the solid content was up to 61.23%, the viscosity was only 342 mPa s, the tensile strength reached 20.97 MPa, and the adhesion grade was 5B, which was the most excellent overall performance, showing satisfactory results. Note de contenu : - EXPERIMENTAL : Materials - Preparation of small-particle waterborne polyurethane (WPU-S) - Preparation of large-particle waterborne polyurethane (WPU-L) - Preparation of high-solid content waterborne polyurethane (WPU-SL) - Preparation of WPU films - CHARACTERIZATION - RESULTS AND DISCUSSION : FTIR spectra of WPU - Emulsion properties of small particle size emulsions (WPU-S) and large particle size emulsions (WPU-L) - The particle size of WPU-SL emulsions and their solid content and viscosity - Thermal properties of WPU-SL emulsions - Water absorption of WPU-SL emulsions and their contact angle - Tensile properties of WPU-SL emulsions - Adhesion of WPU-SL emulsions DOI : https://doi.org/10.1007/s11998-023-00859-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00859-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41066 [article]

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