METHOD FOR PRODUCING PHOSPHORUS flame retardants

摘要

1. A process for the preparation of compounds of the following formula (I) wherein: - R c is selected from the residue -NH, -NHA, and monovalent alkyl and aryl residues - radicals A are independently selected from the following residues phosphoryl DOPO-, DPhPO- and DPhOPO- u indices x, y and z each independently represent 0 or 1, wherein at least one of the indices ≠ 0; vklyuchayuschiypervuyu step wherein a melamine or when R1 is an alkyl or aryl radical, the corresponding alkyl or aryl guanamines vzavimodeystuet with one or more of the following fosfinilhloridov DOP-Cl, DPhP-Cl and DPhOP-Cldlya linking one or more phosphinyl residues from the amino group or groups of melamine or guanamines, a second step wherein a related phosphinyl residue (or residues) by reaction with an oxidizing agent is oxidized to the corresponding phosphoryl residue (or residues) .2. The method of claim. 1, characterized in that a monovalent alkyl or aryl residue Rvybiraetsya of residues -SNili -CH.3. The method of claim. 1, characterized in that the oxidant used peroksid.4. The method of claim. 1, characterized in that as oxidant hydrogen peroxide is used, or t-butilgidroperoksid.5. The method of claim. 1, characterized in that in the first stage reaction is conducted with kisloty.6 trap. The method of claim. 5, characterized in that the acid trapping agent is used simultaneously as rastvoritel.7. A method according to claim. 6, characterized in that as acid scavenger and solvent used 1-metilimidazol.8. The method of claim. 1, characterized in that the second step is carried out with an organic solvent selected from chloroform and toluola.9. The method of claim. 1, characterized in that the first step is conducted at a temperature of 100 to 200 ° C.10. A method according to Claim., Characterized in that the second