Evonik Degussa Gmbh

Zylum Beteiligungsgesellschaft Mbh & Co.

Patente Ii Kg

Edwin Kroke

Gerhard Roewer

Marcus Schwarz

Tobias Gmeiner

Gerrit Fester

The present invention relates to a for controlled synthesis of hydrogen-rich cyclosiloxanes of the (HSiO)type. where n is an integer equal to or greater than 3, by reacting: The ring size is advantageously adjustable to n=3, 4, 5, 6 (especially n=4 to 6), such that larger rings are not formed. In a particularly advantageous embodiment of the process, for the selective preparation of cyclohexasiloxane (HSiO), after the reaction, the solvent is at least partly removed and then solvent is added again.

Process for the manufacture of hydrogen-rich cyclosiloxane

The present invention relates to unsymmetrical and symmetrical phosphorus-comprising heptazine derivatives, represented by the formula (1): in which R, Rand Rare, independently of one another, an azide group &#x2014;Nor an &#x2014;N&#x2550;PRRRgroup, with the proviso that at least one radical from R, Rand Ris an &#x2014;N&#x2550;PRRRgroup, to a process for the preparation thereof and to the use thereof.

Heptazine derivatives containing phosphorus, method for the production thereof and use thereof as flame retardants

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Freiberg, Germany

Edwin Kroke