| 摘要 |
<p>The process for the production of polyesters, and in particular polyethylene terephthalate (PET) involves polymerization, e.g., polycondensation, of one or more diacids and one or more diols in the presence of both an antimony catalyst and an acidic phosphorus-containing additive like e.g. phosphoric acid. The acidic phosphorus additive is introduced prior to the antimony catalyst, preferably by an amount of time to allow a reaction between the additive and at least one diol of the (s) present in the reaction mixture. A polyester resin produced by this process is also provided.</p> |
