COMPOSITION OF POLYETHYLENE FOR FILM PRODUCTION Russian patent published in 2018 - IPC C08L23/06 C08L23/08 C08F2/00 C08J5/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a composition of polyethylene intended for production of films produced by extrusion blowing, as well as to a process for the polymerization of the preparation of said composition of polyethylene. Composition of polyethylene has a density of 0.945 to 0.958 g/cm³, a MIF value of 4.0 to 8.5 g/10 min, MIF/MIP ratio is from 20 to 43 and the long chain branching index (PCR), not exceeding 0.82. Moreover, index of HMWcopo (a copolymer with a high molecular weight) of 3.5 to 20 is used to quantify the crystallization and polymer processing potential.

EFFECT: polyethylene composition of the invention has mechanical strength, processability in processing, good chemical resistance and low intrinsic viscosity, and also provides the required stability of the film hose, even at high drawing speeds, without changing the geometry in the axial and radial directions.

10 cl, 1 dwg, 1 tbl, 4 ex