Polypropylene copolymer is a modified PP with improved impact strength and frost resistance compared to homopolymer. Two types: block copolymer (PP-B) - ethylene blocks in the main chain, random copolymer (PP-R) - random distribution of ethylene. PP-B: impact strength at −20°C is 5–10 times higher than homopolymer. For car bumpers, boxes, containers operating at low temperatures. PP-R: transparency, flexibility, weldability. For heating and hot water supply pipes (PPRC pipes), transparent packaging. GOST 26996-86. Granules, 25 kg bags. PP-R for pipes: pressure rating according to ISO 15874, SDR 6 / SDR 7.4 / SDR 11. PP-R100 is a new generation material with MRS 10 MPa (working pressure 12% higher at the same diameter). Welding: polyfusion (socket) at 260°C. Granule storage: covered warehouses. Manufacturers: SIBUR, Borealis, LyondellBasell. Documentation: quality certificate, TDS, certificate of conformity.