The Boeing Company

Commonwealth Scientific and Industrial Research Organisation

Susan Wan-Yi Holmes

Mathew John Ballard

Philip Stephen Casey

Cameron David Way

Kevin Norman Winzenberg

James Hull

The present disclosure relates to polysiloxanes, processes for preparing polysiloxanes, and hydraulic fluids comprising polysiloxanes. This disclosure also relates to hydraulic fluids comprising one or more polysiloxane compounds and diphosphonate compounds, and to the use of diphosphonate compounds in hydraulic fluids or as additives or components in various compositions, for example to provide fire retardant properties to a fluid or composition. This disclosure also relates to use of the compositions as hydraulic fluids, which may be used in various machines, vehicles and craft, including aircraft.

Polysiloxane hydraulic fluids

Aspects described herein generally relate to methods of making a phosphono paraffin comprising forming a reaction mixture by mixing a haloparaffin, a phosphite, and sodium iodide. Methods comprise heating the reaction mixture to form the phosphono paraffin. Aspects described herein further relate to a phosphono paraffin represented by formula (I): wherein each instance of Ris independently —H or wherein each instance of Rand Ris independently linear or branched Calkyl, Ccycloalkyl, or aryl; the number of instances where Ris of formula (I) is between about 2 and about 8; and n is an integer between 4 and 22.

Phosphono paraffins

Aspects described herein generally relate to methods of making a phosphono paraffin comprising forming a reaction mixture by mixing a haloparaffin, a phosphite, and sodium iodide. Methods comprise heating the reaction mixture to form the phosphono paraffin. Aspects described herein further relate to a phosphono paraffin represented by formula (I): wherein each instance of Ris independently wherein each instance of Rand Ris independently linear or branched Calkyl, Ccycloalkyl, or aryl; the number of instances where Ris of formula (I) is between about 2 and about 8; and n is an integer between 4 and 22.

Aspects described herein generally relate to methods of making a phosphono paraffin comprising forming a reaction mixture by mixing a haloparaffin, a phosphite, and sodium iodide. Methods comprise heating the reaction mixture to form the phosphono paraffin. Aspects described herein further relate to a phosphono paraffin represented by formula (I): wherein each instance of Ris independently &#x2014;H or wherein each instance of Rand Ris independently linear or branched Calkyl, Ccycloalkyl, or aryl; the number of instances where Ris of formula (I) is between about 2 and about 8; and n is an integer between 4 and 22.

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Melbourne, Australia

Susan Wan-Yi Holmes