FIELD: chemistry.
SUBSTANCE: present invention relates to a composition for use as an activator of anionic polymerisation of lactam, a preparation method thereof, a method of producing polyamide, a moulded product and an article comprising same. Composition contains at least one aliphatic isocyanate compound, containing at least two isocyanate groups in amount of 20 to 80 wt% and at least one lactone containing 4-7 carbon atoms. Method for preparing composition involves mixing said components. Method of producing polyamide by anionic polymerisation of lactam involves a step of adding said composition to lactam.
EFFECT: obtained composition does not contain compounds of pyrrolidone, particularly N-alkyl pyrrolidone, and is stable during storage and enables to obtain polyamides of different quality.
13 cl, 2 tbl, 2 ex
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