POLYAMIDE MOULDING COMPOSITION AND METHOD OF PRODUCING MULTILAYER COMPOSITE MATERIAL USING POLYAMIDE MOULDING COMPOSITION Russian patent published in 2011 - IPC C08L77/00 C08L69/00 B29C47/06 

FIELD: chemistry.

SUBSTANCE: moulding composition contains: 100 pts.wt polyamide and 0.005-10 pts.wt of a compound with at least two carbonate structural units. The moulding composition is meant for co-extrusion with a moulding composition based on a high-melting polymer with melting point of crystals T_m of at least 255°C and/or glass transition point of at least 180°C.

EFFECT: obtaining multilayer composite materials of high quality, mainly optimum distribution of layers and walls on the thickness.

6 cl, 2 tbl, 3 ex