POLYETHYLENES WITH INCREASED MOLECULAR WEIGHT DISTRIBUTION Russian patent published in 2018 - IPC C08F210/16 C08J5/18 

FIELD: chemistry.

SUBSTANCE: invention relates to an ethylene polymer which is a copolymer derived from ethylene and one or more C₃-C_20-alpha-olefin comonomers. Polymer has a non-uniform short-chain branching (SCB) distribution, a molecular weight distribution (MWD) of 4.5 to 14, the slope of the strain hardening line is greater than 0.75, the melt flow ratio (MFR) (I₂₁/ I₂) is greater than or equal to 8.33 + (4.17×MMP). Ratio of the weight-average molecular weight calculated using a CP detector to the weight-average molecular weight calculated using a PM detector (refractometric detector) M_w(CP) / M_w(PM) is between 1.4 and 3.0.

EFFECT: ethylene polymers of the invention have excellent processability and are applicable to any conversion process including polymer extrusion, injection moulding, blow moulding, and extrusion to form sheets.

18 cl, 5 dwg, 18 tbl, 32 ex