FIELD: chemistry.
SUBSTANCE: invention relates to method of obtaining polycarbodiimides by two-stage polymerisation of at least one initial compound, containing isocyanate groups. In accordance with claimed method initial compound, containing isocyanate groups, is first, subjected to first polymerisation in substance mass in presence of catalyst (1), with obtaining first product of polymerisation; and (2) obtained at the process stage (1) first product of polymerisation is subjected to second polymerisation in solution. Invention relates to polycarbodiimides, obtained by claimed method.
EFFECT: method makes it possible to obtain polycarbodiimides with higher molecular weight and/or lower polydispersity.
10 cl, 5 dwg, 5 tbl
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