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One-pot synthesis and structural characterization of urea-isobutyraldehyde-formaldehyde resin

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Abstract

Urea-isobutyraldehyde-formaldehyde (UIF) resin was synthesized from urea, isobutyraldehyde, and formaldehyde using sulfuric acid as a catalyst by one pot method. The effects of molar ratios of isobutyraldehyde to formaldehyde (n(I)/n(F)) and aldehyde to urea (n(A)/n(U)) on the yield, hydroxyl value (vs KOH) and softening point of the resin were investigated. The structure of the resin was characterized by FT-IR, 1H-NMR and 13C-NMR. The results show that when the molar ratio of urea to isobutyraldehyde to formaldehyde (n(U)/n(I)/n(F)) is 1.0/3.0/3.0, the yield UIF resin is 67.1%, and the softening point and hydroxyl value are 88 °C and 37 mg/g, respectively. The FT-IR, 1H-NMR and 13C-NMR results show that the lactam is formed by aminomethylation from urea, isobutyraldehyde, and formaldehyde.

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Authors and Affiliations

  1. College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China

    Yi-fu Zhang  (张一甫) & Xing-rong Zeng  (曾幸荣)

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  1. Yi-fu Zhang  (张一甫)
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  2. Xing-rong Zeng  (曾幸荣)
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Correspondence to Xing-rong Zeng  (曾幸荣).

Additional information

Foundation item: Project(2006A10902001) supported by the Science and Technology Plan of Guangdong Province, China; Project(2007Z3-D0351) supported by the Science and Technology Plan of Guangzhou City, China

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Zhang, Yf., Zeng, Xr. One-pot synthesis and structural characterization of urea-isobutyraldehyde-formaldehyde resin. J. Cent. South Univ. Technol. 16, 80–84 (2009). https://doi.org/10.1007/s11771-009-0013-7

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  • DOI: https://doi.org/10.1007/s11771-009-0013-7

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