Abstract: Alkyd resins are oil modified polyesters produced by reacting di-carboxylic acid or it's anhydride with a polyol. Phthalic anhydried is one of the most common di-carboxylic acid used in alkyd resin industry. It is an anhydride of phthalic acid (PA). Phthalic acid is an isomer of terephthalic (TPA) and isophthalic acids (IPA) . Among these three isomers terephthalic acid is water insoluble solid and it gives good water and whether resistance to alkyd based paints. But conventional alkyd making techniques cannot be apply for TPA due to its high stability and reaction temperature compare to the PA.
Present investigation was aimed to develop new methodology to synthesis alkyd resin from TPA and it was successfully achieved by altering the order of feeding raw materials and increasing the reaction temperature (260-280 °C). At 280 °C temperature 66.5 g soya oil, 25.26 g TPA, 12.9 g glycerol and 1 g Maleic anhydride (MA) produced a long oil alkyd resin with acid value 11.4 mgKOH/g , Hydroxyl value 43.2 mgKOH/g and touch drying time 185 minutes. Total Processing time was 120 minutes.
Keywords: Terephthalic acid, Alkyd Resin, Alcoholysis, Phthalic Anhydride.
Title: Development of Suitable Methodology to Synthesize Terephthalic Acid Based Alkyd Resin
Author: Udayakumara S.V., Gunapala O.
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
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