POLYPROPYLENE-BASED POLYMER COMPOSITION (VERSIONS), METHOD FOR PRODUCTION THEREOF (VERSIONS), USE THEREOF AND ARTICLES CONTAINING SAME Russian patent published in 2024 - IPC C08L23/12 B29C64/00 B33Y70/00 B33Y10/00 

FIELD: processing of plastics.

SUBSTANCE: present invention relates to a polymer composition for producing cast or 3D articles, as well as to a method for production thereof. Said composition contains from 40 to 50 wt.% of (A) crystalline isotactic propylene homopolymer; from 27 to 37 wt.% (B) of a first copolymer of ethylene with an α-olefin containing from 4 to 10 carbon atoms, and having density of 0.855 to 0.890 g/cm³; from 17 to 23 wt.% (C) of the second copolymer of ethylene with α-olefin containing from 3 to 8 carbon atoms, and characterized by density from 0.910 to 0.927 g/cm³. Melting enthalpy of the composition, determined by differential scanning calorimetry, is not more than 60 J/g.

EFFECT: compositions provide an improved balance of technological (reduced shrinkage of the article, no warping) and operational (strength characteristics) properties.

33 cl, 8 dwg, 2 tbl, 5 ex