FIELD: chemistry.
SUBSTANCE: invention relates to compositions for producing cast polyamides and to a method for preparation thereof. Composition contains (a) at least one lactam and (b) at least one activator for anionic polymerisation of lactams of formula (I): 
in which R1 denotes lactam, preferably caprolactam. Additionally composition can contain a catalyst (c). Method of producing cast polyamides comprises polymerisation of said components (a) and (b) and optionally component (c), which are in form of melt. Polymerisation is carried out at temperature from 80 to 160 °C.
EFFECT: invention enables to obtain a composite parts of a composition which contains an activator with very low concentration, and which does not contain a solvent.
6 cl, 1 tbl, 6 ex
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