POLYMER COMPOSITION FOR CROSS-LINKED PRODUCTS Russian patent published in 2015 - IPC C08L23/04 C08F8/00 C08J3/24 C08K5/14 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining cross-linked product. Method includes stage of polyethylene polymerisation, optionally, with one or more alpha-olefin comonomer(s) in presence of Ziegler-Natta catalyst, formation of product from said polymer and its further cross-linking. Ethylene polymer, obtained at the stage of polymerisation, contains double bonds carbon-carbon/1000 of carbon atoms in the range from more than 0.2 to fewer than 5.0 double bonds, is characterised by molecular-weight distribution (MWD) in the range from 3.3 to 15 and does not contain long-chain branches. Said polymer is selected from rubbers (POE), thermoplasts (POP) or very low density polyethylenes (ethylene copolymers) (VLDPE), which have range of density from 855 to 909 kg/m³, or linear low density polyethylenes (ethylene copolymers) (LLDPE) with density from 910 to 930 kg/m³, of middle density ethylene copolymers (MDRE) with density from 931 to 945 kg/m³.

EFFECT: obtained cross-linked products have good mechanical properties, meeting high requirements and strict norms.

9 cl, 4 tbl, 8 ex