Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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La Seda de Barcelona SA
Original Assignee
La Seda de Barcelona SA
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Filing date
Publication date
Application filed by La Seda de Barcelona SAfiledCriticalLa Seda de Barcelona SA
Priority to ES374827ApriorityCriticalpatent/ES374827A3/en
Publication of ES374827A3publicationCriticalpatent/ES374827A3/en
Process for the modification of spinnable polyesters especially to reduce the concentration of free carboxyl groups of polyester, particularly poly (ethylene terephthalate), characterized by reacting the molten polyester with an epoxy organic compound of general formula ** (see formula) ** Wherein n is equal to l or 2 and r represents an aliphatic, aromatic, or aliphatic-aromatic hydrocarbon radical. (Machine-translation by Google Translate, not legally binding)
ES374827A1969-12-131969-12-13Procedure for the modification of hilable polyesters. (Machine-translation by Google Translate, not legally binding)
ExpiredES374827A3
(en)
A procedure for discondenating polyethylene therethalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
A procedure for the polycondensation of reaction products of dimethyl tereftalate and etilenoglycol (Machine-translation by Google Translate, not legally binding)