Diethanol amide preparation

Preparation of diethanol amide from the methyl ester of the oil... 

Preparation of poly (ester amide) from diethanol amide of fatty acid... 

In most of the reports on this process, the azeotropic technique was used for the preparation of poly(ester amide) resins, where the diethanol amide of the fatty acids, with dibasic acids or anhydrides, is heated in refluxing xylene using different types of catalysts such as NaOMe and phosphoric acid. It has been found that the technique described above produces a good yield of resin in a much shorter time. In this technique, the xylene used during the resinification reaction is automatically removed from the product by evaporation under the usual reaction conditions. 

Recently, polyester amides were prepared by heating linseed diethanol-amide in refluxing xylene with dibasic acids or anhydrides to give modified alkyd resins [63, 64]. 

A few hyperbranched poly(ester amide)s have been prepared using a similar A2 + BBV approach, in which phthalic anhydride or maleic anhydride as an A2 monomer and diethanol amine as a BB 2 monomer were used. The polycondensation polymerisation technique is used to prepare the polymers. These poly(ester amide)s are modified by long alkyl chain (fatty acids) end groups. The dielectric properties of the modified polymers were investigated over a range of frequencies and temperatures. No relaxation peak was noticed in the dielectric spectrum at different temperatures. Castor oil and Mesua ferrea L. seed oil-based hyperbranched poly(ester amide)s are prepared using diethanol fatty amide of the oils with different types of anhydrides and dibasic acids with or without diethanolamine. 

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