POLYETHYLENE PIPE Russian patent published in 2024 - IPC C08K3/22 C08K3/00 C08K5/3492 C08L23/06 B29C48/32 

FIELD: storage or distribution of gases or liquids.

SUBSTANCE: invention relates to polyethylene pipes. Disclosed is a polyethylene pipe containing components A), B) and C), where component A) is a hindered amine-based light stabilizer containing a triazine residue, which is a compound of formula (A-I-1), wherein a1 is from 2 to 10, component B) is natural or synthetic hydrotalcite, component C) is a phenolic antioxidant selected from the group consisting of 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)2,4,6-trimethylbenzene, ethylene bis[3,3-bis(3-tert-butyl-4hydroxyphenyl)butyrate] or 1,3,5-tris(3,5-di-tert-butyl-4hydroxybenzyl)-isocyanurate, and the weight ratio of component A) and component B) is from 1:10 to 10:1; use of a mixture containing components A) and B) at a weight ratio of 1:10 to 10:1 to stabilize a polyethylene pipe and a method of stabilizing a polyethylene pipe by including components A) and B) in the polyethylene at a weight ratio of 1:10 to 10:1.

EFFECT: obtaining polyethylene pipe with high values of induction period of oxidation of OIT.

10 cl, 2 tbl, 4 ex