Derivatives of carbamide, symmetrical triazines, and heptazines: Ecologically clean fire retardants for different thermostable compositions

The problems of replacing conventional halogen-containing fire retardants with alternative products, such as carbamide and symmetrical triazines and heptazines obtained on its basis, as well as different phosphates and ammonium polyphosphates, are considered. The main properties of the suggested compounds are described. It is shown that the range of compounds can be used, not only as fire retardants, but also as curing or modifying agents for polymer compositions, thermostabilizers of resins (based on ethylene-propylene rubbers) and sealants, and components of thermostable organosilicon compositions.