Ethylene Glycol → Dimethyl terephthalate

Participants

Reaction Steps

A polyester is produced in known manner from 388 g of dimethyl terephthalate, 112 g of ethylene glycol and 75 g of glycerin, and mixed with 204 g of the reaction product of Example A at a temperature of 180°-215° C. in two portions. After the diimidodicarboxylic acid (of Example A) is completely taken up in the terephthalate resin, 1.0 g of cadmium acetate is added thereto and the reaction mixture is further condensed for 3 hours at 215° C., finally under vacuum. The obtained resin is dissolved in 450 g of technical cresol while still hot, and mixed with a solution of 9 g of butyl titanate in 27 g of cresol.

Provenance & Evidence