Recent trends on preparation and evaluation of some polyesteramides for surface coatings

Catalytic polymerization of N,N-diethanol acrylamide with phthalic anhydride in the presence of H-mordenite and Fe-mordenite zeolites

“…Regarding the reaction mechanism of DEAA and ester formation from AA and DEA, there has been several studies suggest that the acidity of the catalyst plays an important role [4,5,7]. Revealing the acid sites on the catalysts and their relation to the DEAA (DEMA) formation was achieved using NH 3 adsorption.…”

“…This type of products shows absorption bands at 1735, 1627-1637 and 1366 cm −1 . The band at 1735 cm −1 can not be ascribed to νCON species [3][4][5] but rather due to νC=O of ester [16] where that of amide νC=O that used to appear in the region 1650-1610 cm −1 [17] presumably overlapped by the tail of the ester and the νC=C band (1627-1637 cm −1 ). The broadness of the latter band (1627-1637 cm −1 ) give emphasis to the previous assignment concerning the amide C=O band.…”

“…The diol formation was performed by reacting diethanolamine (DEA) and acrylic acid in the presence of the latter catalyst in addition to Fe-mordenites using o-xylene as a solvent (bp 140 • C). The diol (DEAA) was the major product produced according to the expected strong interaction of the amine (DEA) with the carboxyl group of the acid [3][4][5][6]. This reaction was followed up by monitoring the amount of water liberated.…”

“…The reaction proceeds to completion in forming DEAA and DEMA with selectivities 91 and 9%, respectively. It is noteworthy mentioning that the majority of the work used to prepare dihydric amino alcohol derivatives of fatty acids claimed the absence of the ester formation [1][2][3][4][5][6].…”

“…Diethanolamine derivatives of fatty acids were used in the preparation of polyesteramide and alkyd/polyesteramide resins [3,4]. Most alkylolamides are derived from ethanolamine and fatty acids [5,6]. The above-mentioned derivatives are used as the ingredient source of dihydric alcohol for polycondensation.…”