Copolymers of ethylene and at least one other 1-olefin, and...

Details Copolymers of ethylene and at least one other 1-olefin, and... Copolymers of ethylene and at least one other 1-olefin, and...

C - Chemistry, Metallurgy

08

F

C08F 210/02 (2006.01) C08F 4/78 (2006.01)

Patent

CA 2640689

Ethylene copolymers composed of ethylene units and units composed of at least one other 1- olefin whose density is from 0.940 to 0.955 g/cm3, whose vinyl end group content is at least 0.5 end groups, based on 1000 carbon atoms, whose tensile impact strength atn, measured to ISO 8256 (1997) /1A at -30~C, is greater than or equal to 145 kJ/m2, and whose content of comonomer side chains per 1000 carbon atoms Cx is above a value defined via equation I, C x = 128.7 - 134.62 ~ d' (I), where d' is the density d of the copolymer in g/cm3, and a process for their preparation, and their use as blow-molded products.

L'invention concerne des copolymères d'éthylène composés d'unités d'éthylène et d'unités composées d'au moins une autre 1-oléfine dont la densité est comprise entre 0,940 et 0,955 g/cm3, dont la teneur en groupements terminaux vinyle est supérieure ou égale à 0,5 groupement terminal, pour 1 000 atomes de carbone, dont la résistance à la déformation atn, mesurée selon ISO 8256 (1997) /1A à -30 °C, est supérieure ou égale à 145 kJ/m2, et dont la teneur en chaînes latérales de comonomère pour 1 000 atomes de carbone Cx est supérieure à une valeur définie par l'équation I, C x = 128,7 - 134,62 - d' (I), dans laquelle d' représente la densité d du polymère en g/cm3, ainsi qu'un procédé de fabrication de ces copolymères et leur utilisation en tant que produits moulés-soufflés.

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