NUCLEIED POLYPROPYLENE COMPOSITION FOR CONTAINERS Russian patent published in 2017 - IPC B29C45/00 B65D1/26 C08L23/14 C08K5/00 

FIELD: packaging industry.

SUBSTANCE: composition comprises from 95.0 to 99.25 wt % of propylene copolymer (A) with one or more olefin comonomers in an amount of 0.1 wt % to 3.0 wt % based on the total weight of the polypropylene and the nucleating agent composition (B) which is a polymeric nucleating agent. The polypropylene composition has a tensile modulus at least 1300 MPa according to ISO 527-1:1996 and ISO 527-2:1996 for the test specimen moulded ISO 527-2: 1996 Type 1A, injection moulding was carried out in accordance with ISO 1873-2:2007. In this case, the copolymer of propylene (A) has a melt flow index determined in accordance with ISO 1133 at 230°C and under load 2.16 kg, In the range from 25 g/10 min to 200 g/10 min.

EFFECT: combination of the above properties of the polypropylene composition provides castable container according to the invention an optimum balance of impact strength/stiffness, increased impact properties as well as excellent strength and good organoleptic properties.

18 cl, 7 tbl