POLYOLEFIN COMPOSITIONS Russian patent published in 2015 - IPC C08L23/10 C08J5/18 B29C39/00 

FIELD: chemistry.

SUBSTANCE: invention relates to polyolefin compositions, suitable for the manufacture of various articles. A polyolefin composition, comprising in percent by weight: 1) and 2): 1) 75-85 wt % propylene homopolymer, having the melting point of 150°C or more, 2) 15-25 wt % ethylene copolymer with one or more C₄-C₁₀ α-olefins (α-olefin), containing from 20 to 30% of the said C₄-C₁₀ α-olefins (α-olefin); the composition is characterised as follows: - MFR value from 5 to 10 g/10 min. at 230°C, 2.16 kg, - total content of ethylene from 10.5 to 20%, - total content of C₄-C₁₀ α-olefins (α-olefin) within the range of 3 to 7.5%, - the ratio (XStot/XSm) of the total fraction soluble in xylene at room temperature to the fraction soluble in xylene at room temperature of the matrix component (1) from 5 to 15 and - the value of the intrinsic viscosity of the total fraction soluble in xylene at room temperature (XSIVtot) of 1.5 dl/g or less. Also claimed are: method for the preparation of polyolefin compositions, films, cast films, injection moulded articles.

EFFECT: polyolefin composition based films exhibit heat sealability, retortability, low haze.

6 cl, 2 tbl, 2 ex