Bisphenol A diglycidyl ether → Bisphenol A

Participants

Reaction Steps

Diethanolamine (525.70 grams, 5.00 amine hydrogen equivalents) is added to a 2 liter glass reactor equipped with a mechanical stirrer, chilled water condenser, nitrogen inlet, thermostatically controlled heating mantle, thermometer, and an inlet tube for the diglycidyl ether of bisphenol A. The diethanolamine is heated to 70° C. under a stream of nitrogen flowing at 1 liter per minute, then stirring commenced. A peristaltic pump is started to add diglycidyl ether of bisphenol A (179.95 epoxide equivalent weight (EEW)) to the reactor at a rate of 1.62 gram per minute. During the course of this addition, the temperature is maintained between 70° C. and 71° C.. After a total of 899.75 grams (5.00 epoxide equivalents) of the diglycidyl ether of bisphenol A is added to the reactor, post reaction is completed for 3 hours at 75° C., 12 hours at 90° C., then 2 hours at 150° C.. The adduct is recovered as a transparent tacky solid (at 25° C.) with a hydroxyl content of 17.2 percent.

Provenance & Evidence