FIELD: chemistry.
SUBSTANCE: described is a high-density polyethylene copolymer for moulding packaging materials, which is a high molecular weight copolymer of ethylene and alpha-olefin. The copolymer has density in the range of 0.935-0.952 g/cm3, melt flow index (I2) in the range of 30-75 g/10 min, ratio I21/I2 in the range of 13-35, ratio Mw/Mn in the range of 3.5-8 and brittle point at least lower than -20°C. The invention also describes a method of producing a high-density polyethylene copolymer, an article and a method of making the article.
EFFECT: obtaining a polyethylene copolymer, having improved properties which are suitable for pressure casting.
16 cl, 3 tbl, 4 ex
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