Metadynea Austria Gmbh

Krems Chemie Chemical Services Ag

Bernadette Mehofer

Michael Ciesielski

Thomas Zich

Manfred Doring

Bettina Burk

Fritz Johann Freidl

Johannes Artner

Michael Hönel

Gilbert Zwick

Muriel Rakotomalala

Manfred Döring

A method for producing compounds of formula (I) in which the radical Ris selected from &#x2014;NH, &#x2014;NHAz, and monovalent alkyl and aryl radicals, the radicals A are selected in each case independently of one another from the phosphoryl radicals DOPO-, DPhPO- and DPhOPO-, and the indices x, y and z, in each case independently of one another, stand for 0 or 1, wherein at least one of the indices is &#x2260;0, by reacting, in a first step, melamine or, when Ris an alkyl or aryl radical, the corresponding alkyl or aryl guanamine, with one or more of the corresponding phosphinyl chlorides DOP-CI, DPhP-Cl and DPhOP-CI, in order to bond one or more phosphinyl radicals to the amino groups(s) of the melamine or guanamine, and in a second step oxidizing the phosphinyl radical(s) by reaction with an oxidizing agent to give the corresponding phosphoryl radical(s).

Method for producing phosphorus-containing flame retardants

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Krems, Austria

Bernadette Mehofer