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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Priority claimed from GB11946/53Aexternal-prioritypatent/GB742811A/en
Application filed by Imperial Chemical Industries LtdfiledCriticalImperial Chemical Industries Ltd
Publication of ES215049A1publicationCriticalpatent/ES215049A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Process for obtaining poly esters characterized in that first a bis- (hydroxy alkyl) terephthalate is formed by an ester exchange process of a glycol and an alkyl ester of terephthalic acid and then polymerized by heating at atmospheric pressure, being used as a catalyst for the ester exchange process a calcium, strontium or barium compound, which is soluble in the reaction mixture. (Machine-translation by Google Translate, not legally binding)
ES0215049A1953-04-301954-04-29A process for obtaining polyesters (Machine-translation by Google Translate, not legally binding)
ExpiredES215049A1
(en)
A procedure for the polycondensation of diolesters of aromatic dicarboxylic acids, particularly those of the tereftelic acid (Machine-translation by Google Translate, not legally binding)