| abstract |
PROCEDURE FOR OBTAINING ETHYLENE COPOLYMERS IN GRANULAR FORM AND WITH DENSITY OF 0.91 TO 0.94, IN THE PRESENCE OF A CATALYST CONTAINING TITANIUM, IN GASEOUS PHASE, AT A PRESSURE LESS THAN 71 KG / CM. IT CONSISTS OF COPOLYMERIZING ETHYLENE WITH AT LEAST ONE ~ C-OLEFIN OF 3 TO 8 CARBON ATOMS, AT A TEMPERATURE BETWEEN 30 C AND 105 C, BRINGING INTO CONTACT THE MONOMERS AND 0 TO 2 MOLES OF HYDROGEN PER MOL OF ETHYLENE IN A GASEOUS PHASE PARTICLES OF A CATALYST COMPOSITION CONTAINING A COMPOUND OF FORMULA MG <MTI <L (OR) <NX <P (ED) <Q ACTIVATED, WHERE R IS AN ALKYL OR ARYL; X IS CHLORINE, BROMINE OR IODINE; AND M, N, P AND Q HAVE DIFFERENT VALUES. THESE COPOLIMWROS HAVE APPLICATIONS FOR THE OBTAINING OF FILMS USED IN PACKAGING AND TO CONTAIN PRINTED MATERIAL. |