A method of producing modified ethyl polyterephthalate with high dyeing capacity.

摘要

1. The method of producing modified ethyl polyterephthalate with high dyeing capacity consists in carrying out the reaction of dimethylterephthalate or terephthalic acid with ethylene glycol. It is characterised in that a mixture of methyl esters of aliphatic dicarboxylic acids is introduced into the reaction. The mixture consists of: 5-30 percent by mass of dimethyl ester of succinic acid, 35-70 percent by mass of dimethyl ester of glutaric acid and 10-40 percent by mass of dimethyl ester of adipic acid. The amount of the used mixture constitutes 2-50 percent by mass of dimetylterephthalate or terephthalic acid.