The process for producing polyesters, and in particular, polyethylene terephthalate (PET) which includes the use of antimony catalyst that is acidic phosphorus additive involves the addition of the catalyst prior to or together with the additive. Moreover, the amount of additive is selected so as to...http://www.google.es/patents/US6384180?utm_source=gb-gplus-sharePatente US6384180 - Method for making polyesters employing acidic phosphorus-containing compounds
Method for making polyesters employing acidic phosphorus-containing compounds
