NOVEL POLYMER COMPOSITION FOR USE IN BLOW MOULDING Russian patent published in 2016 - IPC C08L23/06 C08L23/08 C08F10/02 C08F2/01 B65D88/00 C08F110/02 C08F210/16 

FIELD: technological processes.

SUBSTANCE: invention relates to a polymer composition, preparation method thereof, use of said polymer composition for blow molding of containers and containers themselves. Polymer composition has density from 0.940 to 0.949 g/cm³, flow melt index (HLMI) according to DIN EN ISO 1133:2005, condition G, at 190 °C and 21.6 kg, from 3 to 7 g/10 min and branching circuit (HLCBI) from 3 to 8. Polymer composition contains homopolymers of ethylene and/or copolymers of ethylene C₃-C₈-alpha-olefins and is produced by polymerisation of one or more catalysts Ziegler in series of at least two reactors polymerisation.

EFFECT: obtained composition is improved stability of dimensions of molded article from mold and cooling to ambient temperature, as well as high surface quality of finished product and good balance of mechanical properties (rigidity, impact strength, resistance to formation and growth of cracks caused by exposure environment).

11 cl, 3 tbl, 3 ex