Fluorinated diphenols and method for their preparation
AssigneeGeneral Electric Company
InventorsVictor Mark, Charles V. Hedges
Life of this patent
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Abstract
Fluorinated bisphenols having a fluorinated alkyl group and a hydrogen atom upon the methylene carbon atom are prepared at atmospheric pressure or at low pressures from a phenol reactant and a fluorinated aldehyde compound in the presence of gaseous hydrogen chloride or gaseous hydrogen bromide catalyst. The fluroinated bisphenols having the fluorinated alkyl group and a hydrogen atom upon the methylene carbon atom are produced in excellent yields and are used for making flame-retardant polycarbonates and polyester-carbonate copolymers.
Claims16
A fluorinated bisphenol having the general formula ##STR11## wherein R is a fluorinated alkyl or fluorinated aryl radical, and Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 are each independently selected from the group consisting of hydrogen, alkyl radical, chlorine and bromine.
Dependencies are inferred from the claim text.