Process for stabilizing organophosphorus compounds

Details Process for stabilizing organophosphorus compounds Process for stabilizing organophosphorus compounds

1992-02-27

1993-05-04

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

558148, 558150, C07F 940, C07F 920, C07F 918, C07F 9142

Patent

active

052083624

ABSTRACT:
Organophosphorus compounds are stabilized against decomposition during and after recovery from their synthesis reaction mixtures by the addition to the synthesis reaction mixture of at least 0.5% by weight of an acid scavenger, based on the weight of the organophosphorus compound, before allowing the organophosphorus compound to crystallize. The invention is of particular value in the stabilization of 2,2'-alkylidenebis(dialkylphenyl)fluorophosphonites, such as 2,2'-ethylidenebis(4,6-di-t-butylphenyl)fluorophosphite, which is rendered more suitable for use as a stabilizer for organic polymers, e.g., polycarbonates, by the practice of the invention.

REFERENCES:
patent: 4402858 (1983-09-01), Capolupo et al.
patent: 4962144 (1990-10-01), Babillis et al.
IUPAC Nomenclature of Organic Chemistry; 1979 edition; Pergamon: New York, 1979; p. 395.

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