POLYETHYLENE COMPOSITION WITH IMPROVED BALANCE OF STRENGTH AND ELASTICITY, METHOD FOR ITS PRODUCTION AND APPLICATION Russian patent published in 2023 - IPC C08L23/04 C08L23/06 F16L57/00 C08J5/10 H01B7/04 

FIELD: polymer production.

SUBSTANCE: polyethylene composition for pipe and cable insulation. The polyethylene composition relative to the total weight of the composition is: from 28 to 63 wt.% linear low density polyethylene (LLDPE); from 32 to 55 wt.% high density polyethylene (HDPE); from 5 to 12 wt.% polymeric nucleating additive sampled from (semi-) crystalline isotactic polypropylene; or an elastomer which is predominantly a copolymer of propylene with ethylene and/or butene-1; or an elastomer which is predominantly copolymers of ethylene with C₄-C₈α-olefin; or an elastomer which is predominantly amorphous random copolymers of ethylene with acrylate comonomers; from 0 to 5 wt.% other functional additives. The composition is obtained by mixing and processing components into a homogeneous hot melt using mixing equipment and an extruder.

EFFECT: high strength and elasticity, expressed in an increase in tensile strength up to 40 MPa and relative elongation up to 850%.

34 cl, 1 tbl, 3 dwg