POLYETHYLENE RESIN Russian patent published in 2019 - IPC C08F210/16 C08F10/02 C08F4/6592 

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene resins. Polyethylene resin contains units derived from ethylene and optionally one or more other olefins. Resin has a density greater than or equal to 0.945 g/cm³, measured according to ASTM D792, melt flow ratio (I₂₁/ I₅) in the range of 10–60, measured according to ASTM D1238 (I₂₁ and I₅ measured at 190 °C and a mass of 21.6 kg or 5 kg, respectively), and a flow index (I₂₁) in the range of 2–60. Resin is obtained by bringing ethylene, hydrogen, and optionally one or more other olefins into contact with a catalyst system containing at least two different catalytic compounds in a ratio of 2.5 to 1.8.

EFFECT: polyethylene resins exhibit a variable melt flow ratio and/or variable swelling properties using a single catalytic system.

10 cl, 2 dwg, 5 tbl, 4 ex