Phenol → Adipic Acid

Participants

Reaction Steps

A solution is formed by mixing 60.0 grams of trimellitic acid anhydride and 130.0 grams of p,p' diphenyl methane diisocyanate and 110.0 grams of Bis 2-ethoxy ethylether and 4.8 grams of phenol by heating the mixture. At approximately 135°C. a clear, homogeneous solution is obtained. Once clarity is obtained 27.0 grams of adipic acid is added slowly. The temperature of the mixture is raised to approximately 190°C. and slow reflux is maintained. After approximately 45 minutes, a brownish viscous resin is obtained and 346.2 grams of phenol are added to quench and stop the reaction. The solution is maintained at 130°C. until all the resin is dissolved. The resultant solution is cooled to room temperature and filtered. The viscosity of the product at 25°C. was measured at about 210 cps, utilizing a Brookfield viscometer, and a resin solution of approximately 30% weight resin.

Provenance & Evidence