Benzoic Acid → Dicyclopentadiene

Participants

Reaction Steps

640 T of soya oil fatty acid, 180 T of benzoic acid, 350 T of phthalic anhydride and 335 T of pentaerythritol are condensed at 210° to 230° C, after the addition of 35 T of xylene, in an inert gas atmosphere with distillation of the water formed during esterification, until an acid number of less than 10 is reached. Then 155 T of a copolymer obtained from dicyclopentadiene and fumaric acid in a molar ratio of 5:1 and having an acid number of 30 and a softening temperature of 70 to 80° C are added and condensed at 240° C with the alkyd resin formed beforehand until a viscosity of 10000 mPa.s (55% in a benzinexylene mixture 4:1) and an acid number of less than 15, based on the solid resin, are obtained. The end product is diluted with the above-mentioned mixture of solvents to form a 55% solution.

Provenance & Evidence