Oxalic Acid → HCID 86737605, compound

Participants

Reaction Steps

Subsequently, the reflux condenser on the flask is substituted with a separator, and then the temperature of the mixture is adjusted to 60° C. and thereto are added resorcinol (220 g, 2.0 mol) and oxalic acid (11 g). After dissolving completely, the temperature of the mixture is raised, and thereby, the pre-polycondensate of p-cresol is reacted with resorcinol for 4 hours, during which the produced water-toluene azeotrope is led to the separator. The toluene separated is circulated to the flask and water separated is removed out of the reaction system. After completion of the reaction, toluene is distilled off, and finally, the mixture is concentrated at 150° C. under reduced pressure (reduced degree: 30 mmHg or less) to give a resorcinol/p-cresol/co-polycondensate resin (Resin O) having a softening point of 104° C.

Provenance & Evidence