POLYOLEFIN COMPOSITION FOR INJECTION MOLDING OF LARGE-FORMAT PRODUCTS Russian patent published in 2022 - IPC C08L23/08 

FIELD: organic chemistry.

SUBSTANCE: present invention relates to a group of inventions: polyolefin composition for injection molding of large-format products, impact strength modifier, film and product. The polyolefin composition contains: A) from 5 to 23 wt. % ethylene propylene copolymer and from 1.5 up to 4.5 wt. % of ethylene units; B) from 30 to 40 wt. % of ethylene homopolymer; C) from 40 to 50 wt. % terpolymer of ethylene, propylene and links obtained from 1-butene containing from 50 up to 60 wt. % of ethylene units and containing from 20 up to 30 wt. % of 1-butene links. Ethylene propylene copolymer contains 10 wt. % or less of the fraction soluble in xylene at 25°C (XS_A), and the fraction of the XS_A fraction is taken in relation to the mass A). The ethylene homopolymer contains 3 wt. % or less of the fraction soluble in xylene at 25°C (XS_B), relative to the mass (B). The terpolymer contains from 35 up to 50 wt. % of the fraction soluble in xylene at 25°C (XS_C), and the number of ethylene units, 1-butene units and the XS_C fraction is taken in relation to the mass (C). The sum of the quantities (A)+(B) + (C) is 100 wt. %. The impact strength modifier contains a polyolefin composition. The product obtained by injection molding contains a polyolefin composition.

EFFECT: it is possible to produce large-format products from the obtained polyolefin compositions by injection molding, which demonstrate improved mechanical properties, such as toughness and scratch resistance.

7 cl, 3 tbl, 1 ex