POLYOLEFIN COMPOSITIONS, ARTICLES MADE THEREFROM AND PREPARATION METHODS THEREOF Russian patent published in 2012 - IPC C08L23/06 C08L23/08 C08F297/08 C08J5/00 B29C49/00 

FIELD: chemistry.

SUBSTANCE: composition has density ranging from 0.950 g/cm³ to 0.970 g/cm³, I₂₁ less than or equal to 8, I₂ from 0.02 to 2 dg/min, molecular-weight distribution M_w/M_n from 15 to less than 20, and contains 45-80 wt % high-molecular weight component and 55-20 wt % low-molecular weight component. The high-molecular weight component contains an ethylene and C₃-C₂₀ α-olefin copolymer with density from 0.920 g/cm³ to 0.950 g/cm³, I₂₁ from 0.05 to 1 dg/min and M_w/M_n from 2 to 8. The low-molecular weight component contains an ethylene homopolymer with density from 0.965 g/cm³ to 0.985 g/cm³, I₂ from 600 to 2000 dg/min and M_w/M_n from 2 to 6.

EFFECT: improved processing properties such as low weight of bottles, and improved physical properties such as high hardness of resin with minimal loss of stress cracking resistance and impact resistance.

26 cl, 3 tbl