HETEROPHASE POLYPROPYLENE COMPOSITION WITH HIGH FLEXIBILITY AND SOFTNESS Russian patent published in 2021 - IPC C08L23/12 C08L23/16 

FIELD: chemistry.

SUBSTANCE: present invention relates to a heterophase polypropylene composition for manufacturing products, containing a rubber polymeric base containing a matrix phase and an elastomeric phase dispersed therein, wherein the matrix phase and the elastomeric phase are polymerised in the presence of a catalyst with a single polymerisation center on metal; and wherein the rubber polymeric base comprises: (A) 20 to 55 wt.% of a crystal fraction (CF), as measured using Crystex QC in trichlorobenzene, constituting a fraction of a propylene homopolymer or a fraction of a copolymer from propylene monomeric units and comonomer units from ethylene or alpha-olefins with 4 to 12 carbon atoms with a content of comomer units of up to 6.0 wt.%; and (B) 45 to 80 wt.% of a soluble fraction (SF), as measured using Crystex QC in trichlorobenzene, constituting a copolymer from propylene monomer units and comonomer units from ethylene or alpha-olefins with 4 to 12 carbon atoms, with a content of comomeric units from 17 to 55 wt.% and a characteristic viscosity iV from 1.2 to 7.0 dl/g, wherein the composition of heterophase polypropylene has a tensile elasticity modulus of no more than 700 MPa.

EFFECT: technical result is creation of a heterophase polypropylene composition for manufacturing products.

15 cl, 2 dwg, 5 tbl