POLYETHYLENE AND METHODS FOR PRODUCTION THEREOF Russian patent published in 2016 - IPC C08F2/34 C08F4/6592 C08F10/00 C08F10/02 C08F210/02 C08F210/16 C08J5/18 

FIELD: chemical industry.

SUBSTANCE: invention relates to polyethylene resins. Described a copolymer comprising ethylene and 0.5-25.0 mol% C₃-C₂₀-olefin comonomer. Copolymer has following characteristics: ratio of rupture stress to tensile stress at an elongation of 100 %, equal to 2.5 or more; ratio of burst stress to tensile stress at an elongation of 300 %, equal to 2.4 or more; ratio of burst stress to tensile stress with primary yield strength equal to 2.9 or more; density equal to 0.910 g/cm³ or more; 1 % secant modulus of from 30 to 100 MPa; and a tensile stress equal to Y MPa or more, where Y = (0.0532) * Z-8.6733, and Z is expressed in percent strain and is a number of from 500 to 2,000.

EFFECT: technical result is copolymers have an improved balance between softness, high lifting capacity and/or low ratio of maximum deformation/stress.

5 cl, 12 dwg, 26 tbl, 1 ex