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

来源期刊：中南大学学报(英文版)2009年第1期

论文作者：曾幸荣 张一甫

文章页码：80 - 84

Key words：urea; isobutyraldehyde; formaldehyde; resin; synthesis; structural characterization

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 ℃ 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.

基金信息：the Science and Technology Plan of Guangdong Province, China
the Science and Technology Plan of Guangzhou City, China