POLYOLEFIN MOULDING COMPOSITION WITH IMPROVED RESISTANCE TO THERMAL-OXIDATIVE DECOMPOSITION FOR MAKING PIPES Russian patent published in 2011 - IPC C08L23/02 C08L23/04 C08L23/10 C08K5/53 C08K5/06 C08K5/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a polyolefin moulding composition with higher resistance to thermal-oxidative decomposition and is especially suitable for making pipes which are in prolonged thermal contact with liquids which contain oxidative disinfection substances. The moulding composition contains thermoplastic polyolefin and an organic polyoxy compound in amount of 0.01-1.0% of the total weight of the moulding composition, with general chemical formula R-[(CH₂)_n-O]_m-H, where n is an integer from 1 to 10; m is an integer from 3 to 500 and R is a hydrogen atom, or an OH- group or an alkyl group containing 1-10 carbon atoms and which can additionally have substitutes such as OH, -COOH, -COOR, -OCH₃ or -OC₂H₅. The moulding composition can also contain an unsaturated aliphatic hydrocarbon in amount of up to 5 wt %.

EFFECT: moulding composition has good processability when making pipes and endows pipes made from the composition with higher thermal stability and high rupture resistance combined with improved organoleptic properties.

9 cl, 1 tbl, 5 ex