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 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 3 (09/2009) . - p. 337-344