Benzofuranone stabilization of phosphate esters
AssigneeSupresta LLC
InventorsPaul Albert Iacobucci, Anantha Desikan, Alan Abramson
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Abstract
A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a benzofuranone (e.g., is 5,7-di-t-butyl-3-(3,4 di-methylphenyl)3H-benzofuran-2-one) for a sufficient length of time to decolorize and stabilize the esters against subsequent color formation.
Claims7
A method for decolorizing alkylphenyl esters of phosphoric acid which comprises contacting said esters with an effective amount of 5,7-di-t-butyl-3-(3,4 di-methylphenyl) 3H-benzofuran-2-one for a period of time sufficient to reduce the color to the desired level whereby said esters are decolorized and stabilized against subsequent color formation.
Dependencies are inferred from the claim text.