ES265144A3 - Procedure for the manufacture of saturated linear polycondensors (Machine-translation by Google Translate, not legally binding)
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Procedure for the manufacture of saturated linear polycondensors (Machine-translation by Google Translate, not legally binding)
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TRANSFORMACIONES QUIMICO IND S
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TRANSFORMACIONES QUIMICO IND S
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Process for manufacturing saturated linear polycondensates, characterized in that, starting from a dibasic organic acid and a glycol as reactants, and a catalyst in a proportion comprised between 0.1 to 1%, the mixture is heated to a temperature comprised between 140º and 160º C by injecting, through the fluid mass, an inert gas stream, for the elimination of the esterification water, until the acid number reaches a value lower than 60, followed by a high vacuum, while maintaining the temperature between 120 and 140 [deg.] C., until the acid value reaches a value less than one, the excess glycol is then removed by distillation and an eventual subsequent polymerization is developed to reach the required viscosity grade. (Machine-translation by Google Translate, not legally binding)
ES0265144A1961-02-231961-02-23Procedure for the manufacture of saturated linear polycondensors (Machine-translation by Google Translate, not legally binding)
ExpiredES265144A3
(en)
Improvements introduced in the preparation of a thermoplastic polymer, finished in hydroside. (Machine-translation by Google Translate, not legally binding)
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