Process for the preparation of spinnable and dyeable polyester resins

摘要

Process for the preparation of spinnable and dyeable polyester resins which comprises reacting, in substantially equimolecular ratios, an alkylenediol, in which the alkylene group contains 3 or 4 carbon atoms, with a mixture containing a derivate of terephthalic acid and a comonomer having general formula (I): X1-D(SO3M)-X2 in the presence of a catalyst based on titanium having general formula (II): (RO)2TiL2 wherein L is a diketone