MULTIMODAL POLYMER Russian patent published in 2013 - IPC C08F10/02 C08F297/08 C08L23/04 F16L9/12 

FIELD: chemistry.

SUBSTANCE: invention relates to cross-linked polyethylene, a method of producing cross-linked polyethylene, as well as cross-linked polyethylene and articles, preferably pipes, made therefrom. The cross-linked polyethylene contains a multimodal ethylene polymer with density lower than 950 kg/m³, which is obtained via polymerisation in the presence of a catalyst with one active centre and having STR₂₁ from 2 to 15 g/10 min and shear thinning index PSV_2.7/210 from 5 to 10.

EFFECT: providing a polymer composition with improved cross-linking capacity, eg with cross-linking degree of at least 70%, flexibility and good processability.

14 cl, 3 tbl, 1 ex