Synthesis and structural characterization of urea–isobutyraldehyde–formaldehyde resins / Yi-fu Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 3 (09/2009)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 3 (09/2009) . - p. 337-344 Titre : Synthesis and structural characterization of urea–isobutyraldehyde–formaldehyde resins Type de document : texte imprimé Auteurs : Yi-fu Zhang, Auteur ; Bi-ye Ren, Auteur ; Xing-rong Zeng, Auteur Année de publication : 2009 Article en page(s) : p. 337-344 Note générale : Bibliogr. Langues : Américain (ame) Tags : Urea  Isobutyraldehyde  Formaldehyde  Resin  Structure  Characterization Index. décimale : 667.9 Revêtements et enduits Résumé : Urea–isobutyraldehyde–formaldehyde (UIF) resins were synthesized using urea, isobutyraldehyde, and formaldehyde; sulfuric acid was used as a catalyst. The effects of molar ratio of urea/isobutyraldehyde/formaldehyde (U/I/F) on the properties of resins were investigated, and the structures of the resins were characterized by FTIR, 1H-NMR, and 13C-NMR. When U/I/F was 1.0/3.6/2.4, the yield of the resin was 76.5 %. The softening point and hydroxyl value were 90°C and 32 mg KOH/g, respectively. The FTIR, 1H-NMR, and 13C-NMR results showed that an a-ureidoalkylation reaction occurred between urea and isobutyraldehyde to form a lactam. The UIF resins also contained hydroxyl groups and aldehyde groups; the content of aldehyde groups in the resin increased as the amount of isobutyraldehyde increased. DOI : 10.1007/s11998-008-9126-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9126-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6114 [article]

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