FIELD: polymer materials. SUBSTANCE: composition includes graft-copolymer of polypropylene inoculated by one or more vinyl monomer (10-88 wt %), at least one rubber (2-40 wt %), and polypropylene with broad molecular weight distribution (the balance). Graft-copolymer is a polymer selected from the group including polypropylene homopolymer, static copolymer of propylene with ethylene or C4-C10-α--olefin static trimmer of propylene with ethylene and C4-C10-α--olefin, and the same inoculated by at least one vinyl monomer: styrene, methylmetacrylate, styrene/methylacrylate mixture, atyrene/acrylonitrile mixture, or styrene/methylmetacrylate/acrylonitrile mixture. Polypropylene homopolymer with broad molecular weight distribution constitutes polypropylene homopolymer or polypropylene with broad molecular weight distribution modified by impact-resistant ethylene-propylene rubber. Rubber being a component of composition constitutes a compound selected from the group including olefin rubber consisting of two or more monomers (ethylene, propylene or butylene, and, optionally, non- conjugated diene), at least one block-copolymer of monoalkenyl- substituted aromatic hydrocarbon and conjugated diene or hydrogenation product of this copolymer, graft-copolymer of propylene polymer inoculated by polymerizable monomer or monomer mixture forming, upon polymerization, rubber polymers with vitrification temperature below 20 C, and mixtures of these compounds. Composition may be supplemented by 10-100 weight parts (per 100 weight parts of composition) of filler with particle size 0.5-4.0 mcm: talc, calcium carbonate, silicate, or their mixture. EFFECT: increased strength of product. 12 cl, 15 tbl
