FIELD: chemistry.
SUBSTANCE: present invention relates to composition (C) for producing articles with reduced effect of tiger stripes, an article containing such a composition, use of peroxide (PO) for treating a polypropylene composition (PP) and a method of producing composition (C). Composition (C) contains from 46 to 95 wt. % of modified composition of polypropylene (mPP) from total weight of composition (C) and from 5 to 30 wt. % of inorganic filler (F) from total weight of composition (C). Said modified polypropylene composition (mPP) is obtained by treating a polypropylene (PP) composition with peroxide (PO). Polypropylene (PP) composition contains: (a) a heterophase composition (HECO) containing: (a1) (semi-crystalline polypropylene (PP 1) and (a2) an elastomeric ethylene/propylene copolymer (EPR) dispersed in said (semi) crystalline polypropylene (PP1), (b) a plastomer (PL), which is a copolymer of ethylene and at least one C4-C20 α-olefin, and (c) optionally high flow (PPR) polypropylene, said high flow (PPP) polypropylene preferably has a higher melt flow rate MFR2 (230 °C), measured according to ISO 1133 than that of (semi) crystalline polypropylene (PP1) . Modified polypropylene composition (mPP) has: (i) melt flow rate MFR2 (230 °C), measured according to ISO 1133, higher than 32 g/10 minutes, (ii) intrinsic viscosity IV, determined according to DIN ISO 1628/1 (in decalin at 135 °C), fraction soluble in cold xylene XCS, less than 2.30 dl/g and (iii) intrinsic viscosity IV, determined according to DIN ISO 1628/1 (in decalin at 135 °C), fractions insoluble in cold xylene XCI, less than 1.05 dl/g.
EFFECT: technical result is obtaining a polymer composition with high fluidity, which can be subjected to pressure casting to obtain a compound for use in automotive industry with reduced effect of brindle strips while maintaining high mechanical properties.
13 cl, 3 tbl, 2 ex
