USING ARTICLE MOULDED FROM POLYAMIDE MOULDING COMPOUND AS PIPE INSERT Russian patent published in 2012 - IPC C08G69/00 F16L58/10 

FIELD: chemistry.

SUBSTANCE: disclosed is use as a pipe insert of a tube or hose with outer diameter of at least 25 mm made from polyamide moulding compound which is condensed by adding a compound having at least two carbonate elements in weight ratio of 0.005-10 wt % with respect to polyamide. The initial polyamide moulding compound is prepared beforehand; it is first mixed with a compound with at least two carbonate elements; if necessary, the mixture is first stored and/or transported and then processed into a moulded article, wherein condensation takes place on at that step. Disclosed also is a pipe having said insert.

EFFECT: disclosed insert has better physical and mechanical characteristics compared to known polymer inserts and can be made with high reliability and uniform wall thickness even in large dimensions.

7 cl, 4 tbl, 3 ex