POLYOLEFIN COMPOSITIONS HAVING IMPROVED OPTICAL AND MECHANICAL PROPERTIES Russian patent published in 2012 - IPC C08L23/14 C08F210/06 C08F297/06 C08J5/00 C08J5/18 

FIELD: chemistry.

SUBSTANCE: invention relates to polyolefin compositions and methods of producing said compositions. The polyolefin composition contains (A) a first propylene-ethylene random copolymer, having ethylene content CM_A 1.0-6 wt % and melt flow rate MFR(A) 5-40 g/10 min and (B) a second propylene-ethylene random copolymer. The polyolefin composition has ethylene content CM_AB 2.5-6 wt %, melt flow rate MFR(AB) 3-20 g/10 min, under the condition that CM_AB>CM_A and MFR(A)/MFR(AB)>1.45, and further has randomness R of ethylene distribution in the polymer chain ≥0.945.

EFFECT: disclosed polyolefin compositions have improved optical and mechanical properties, and articles made from said polyolefin compositions have excellent optical properties even after being subjected to heat sterilisation.

13 cl, 1 tbl, 4 ex