Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-03-19
1979-07-17
Hoke, V. P.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
252 466, 260 4595D, 260 458NT, 260 4595F, 426541, C08L 553
Patent
active
041614739
ABSTRACT:
The compounds are trialkylsubstituted hydroxyphenylalkanephosphinates and phosphonates having the formula ##STR1## wherein R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is alkyl, alkyl substituted with one halogen atom, phenyl, phenyl substituted with alkyl groups, alkoxy, alkoxy substituted with one halogen groups, phenoxy, phenoxy substituted with alkyl groups, alkylthioethoxy, alkyloxalkylenoxy, R.sup.4 is alkyl, alkyl substituted with one halogen atom, cycloalkyl, phenyl, phenyl substituted with alkyl groups, alkylthioethyl, thiobisalkylene, alkylene, polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene and n is 1 to 4.
These compounds are usually prepared by reacting the trialkylsubstituted hydroxybenzyl or hydroxyphenylalkyl halide with the appropriate tralkyl or triaryl phosphite or appropriate substituted phosphinite.
The compounds are useful as stabilizers of organic materials subject to oxidative, thermal and UV light deterioration.
REFERENCES:
patent: 3951912 (1976-04-01), Susi
Dexter Martin
Spivack John D.
Ciba-Geigy Corporation
Hall Luther A. R.
Hoke V. P.
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