RANDOM COPOLYMERS OF PROPYLENE AND ETHYLENE WITH A LOW XS/ET RATIO AND A HIGH MFR Russian patent published in 2023 - IPC C08F10/06 C08F10/02 C08F2/00 C08L23/14 

FIELD: polymer compositions.

SUBSTANCE: present invention relates to a group of inventions: a propylene-ethylene copolymer with high flow rates, a polymer composition for moulding moulded products, an injection moulded product, a film, a packaging container for hot products, a storage container. A propylene-ethylene copolymer with high flow rates contains more than 90 wt% of propylene, 2.0–5.0 wt% of ethylene (ET). The amount of xylene (XS) soluble fraction in the copolymer is such that the XS/ET ratio in the copolymer is less than 1.51. The melt flow index of the copolymer is greater than 45 g/10 min at a temperature of 230°C and a load of 2.16 kg, and the molecular weight distribution (Mw/Mn) of the copolymer is greater than 2.8. The polymer composition contains a copolymer of propylene and ethylene in an amount of more than 70 wt%. The injection moulded article, the hot product packaging container, and the storage container are made from this resin composition.

EFFECT: obtaining a static propylene copolymer with improved transparency.

29 cl, 2 tbl, 33 ex