| abstract |
METHOD OF PREPARATION OF COMPOSITIONS OF CONDENSATION POLYMERS OF THE TYPE POLYESTERS, POLYAMIDES AND COPOLYESTERAMIDES. IT INCLUDES THE CONDENSATION REACTION OF POLYMER COMPONENTS IN THE PRESENCE OF 1 TO 5,000 PPM OF AT LEAST ONE REACTIVE COMPOUND THAT HAS ONE OR MORE METHINE UNITS, WHICH ABSORBS IN THE INTERVAL OF 350-650 NM, AT INCREASING TEMPERATURES INCLUDED BETWEEN 285J 190J AND DECREASING PRESSURES BETWEEN 1 ATMOSPHERE AND 0.3 MM OF HG. THESE COMPOSITIONS HAVE APPLICATIONS FOR THE MANUFACTURE OF CONTAINERS FOR BEVERAGES, FOOD AND THE LIKE. |