STABILIZED HIGH DENSITY POLYETHYLENE WITH IMPROVED RESISTANCE TO DAMAGE AND STABILIZING SYSTEM

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to a high-density polyethylene composition for production of pipes or other products used in a piping system, having a resistance to damage in the presence of chlorinated and non-chlorinated water. The composition comprises multimodal high density polyethylene and a stabilizing system consisting of shielded phenol antioxidant, phosphonite or phosphine antioxidant, natural or synthetic hydrotalcite, and other optional additives.;EFFECT: improved oxidative induction time, long term stability, the pipe moulded therefrom have a longer expected durability.;10 cl, 5 dwg, 4 ex, 1 tbl