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US 5,852,197 AGranted
Cyclic disphosphoric esters, a process for their preparation and their use
AssigneeHoechst Aktiengellschaft
InventorHorst Staendeke
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Abstract
The invention relates to cyclic diphosphoric esters of the formula ##STR1## with R=methylethylene, 1,3-cyclohexylene, 1,4-cyclo-hexylene or 1,3-phenylene, a process for their preparation and their use as flame retardants.
Claims2
A cyclic diphosphoric ester of the formula ##STR6## with R=1,3-phenylene.
A cyclic disphosphoric ester of the formula ##STR7## with R=1,3-cyclohexylene or 1,4-cyclohexylene.
Dependencies are inferred from the claim text.