Alcohol-based Michaelis–Arbuzov reaction: an efficient and environmentally-benign method for C–P(O) bond formation
作者:Xiantao Ma、Qing Xu、Huan Li、Chenliang Su、Lei Yu、Xu Zhang、Hongen Cao、Li-Biao Han
DOI:10.1039/c8gc00931g
日期:——
The famous Michaelis–Arbuzovreaction is extensively used both in the laboratory and industry to manufacture tons of widely-used organophosphoryl compounds every year. However, this method and the modified Michaelis–Arbuzovreactions developed recently still have some limitations. We now report a new alcohol-version of the Michaelis–Arbuzovreaction that can provide an efficient and environmentally-benign
[EN] METHOD FOR PREPARING READILY PROCESSABLE, THERMALLY-STABLE, PHOSPHORUS-CONTAINING FLAME RETARDANT MATERIAL<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN MATÉRIAU IGNIFUGE CONTENANT DU PHOSPHORE, THERMIQUEMENT STABLE ET POUVANT ÊTRE FACILEMENT TRAITÉ
申请人:LANXESS SOLUTIONS US INC
公开号:WO2020132095A1
公开(公告)日:2020-06-25
The present disclosure provides for the production of non-halogenated phosphorus containing, thermally stable flame retardant materials directly in the form of a powder or small particles. The process generally includes heating one or more phosphonic acid salts in a high boiling, water miscible, acid stable solvent to dehydration reaction temperatures of 200°C or higher.
[EN] METHOD OF PREPARING PHOSPHORUS-CONTAINING FLAME RETARDANTS AND THEIR USE IN POLYMER COMPOSITIONS<br/>[FR] PROCÉDÉ DE PRÉPARATION D'AGENTS IGNIFUGES CONTENANT DU PHOSPHORE ET LEUR UTILISATION DANS DES COMPOSITIONS POLYMÈRES
申请人:LANXESS SOLUTIONS US INC
公开号:WO2021076169A1
公开(公告)日:2021-04-22
A phosphorus-containing flame retardant is produced by preparing a reaction mixture, the reaction mixture including a phosphonic acid, a solvent for the phosphonic acid, and a metal or suitable metal compound, and reacting the phosphonic acid and the metal or suitable metal compound under conditions as described herein. The chemical composition of the resulting flame retardant product leads to excellent flame retardancy and exhibits high thermal stability. The presently disclosed flame retardants are useful, for example, in polymer compositions, particularly thermoplastics processed at high temperatures, over a wide range of applications.
Certain phosphonic acid salts heated at temperatures over 200° C. generate thermally stable, highly efficient flame retardant materials well suited for use as flame retardant additives in polymers. Various methods for preparing flame retardant materials from more than one phosphonic acid salts are provided, wherein each method can generate different flame retardant materials from the same mixture of starting phosphonic acids. The flame retardants of the invention can be used as the sole flame retardant in a composition or in combination with other flame retardants, synergists or adjuvants.