HETEROPHASE POLYPROPYLENE RESIN Russian patent published in 2013 - IPC C08L23/14 C08L23/16 C08F210/06 H01B3/44 

FIELD: chemistry.

SUBSTANCE: invention relates to a heterophase polypropylene resin, a method of producing such a polypropylene resin and use thereof in making articles, particularly as material for making insulation and semiconductor layers of power cables. The heterophase polypropylene resin contains a matrix phase of a propylene radom copolymer and a rubber phase of an ethylene-propylene copolymer dispersed in the matrix phase. The heterophase polypropylene resin is characterised by melt flow rate (2.16 kg, 230°C) from 1.0 to 100 g/10 min, determined according to ISO 1133, and a fraction which is soluble in p-xylene at 25°C (XCS fraction), which is present in the resin in amount of 28 to 50 wt % and has molecular weight distribution (M_w/M_n) from 1.0 to 4.0.

EFFECT: heterophase polypropylene resin has high softness, improved low-temperature impact characteristics and a high melting point.

14 cl, 3 tbl, 6 ex