A method for the production of 'cationically using visible polyester which is dyeable'

摘要

A process for producing cationically dyeable was using visible which is dyeable (cd) - polyester by esterification of terephthalic acid with diols and subsequent polycondensation of the esterification product to its spinnable polyester melt, characterized in that at the end of the esterification reaction the esterification product of the dimethyl ester of the sodium sulfo isophthalic acid as cd - comonomer is added without the use of transesterification catalysts.