| abstract |
The invention relates to modified polyesters derived from terephthalic acid or its derivatives which form polyesters and aliphatic diols, preferably those with 3 to 8 carbon atoms, in particular polytetramethylene terephthalate. These polyesters have number-average molecular weights Mn greater than 17,000, preferably greater than 23,000, in particular greater than 29,000, carboxyl equivalents equal to / greater than 10 mVal / kg and an N content less than 0.4, preferably less than 0.2% by weight. Application to the preparation of molded bodies. |