Alkyd resins trimellitic anhydride based

The oleoresinous, trimellitic anhydride-based alkyd was also obtained commercially it is a 46% oil length safflower oil resin. In addition to the trimellitic anhydride the resin also contains hydrogenated bis-phenol-A and isophthalic acid (5). 

Preparation of a Trimellitic Anhydride-Based Alkyd Resin No. 3712NT. . 179... 

In recent years the availability of several aromatic polycarboxylic acids has been exploited in specialty alkyd resin preparations [57, 58]. For example, trimellitic acid-based alkyds are used in alkyd-melamine enamels and acrylic lacquers [57]. Isophthalic acid can be used alone or in conjunction with trimellitic anhydride or phthalic anhydride [59]. Pyromellitic acid and pyromellitic anhydride have also been suggested as partial replacements for phthalic anhydride in long or short oil alkyds to give more water-resistant (also caustic- and gasoline-resistant) coatings [60]. 

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