The compounds are trialkylsubstituted hydroxyphenylalkanephosphinates and phosphonates having the formula ##SPC1## 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, alkyll 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 trialkyl or triaryl phosphite or appropriate substituted phosphinite. The compounds are useful as stabilizers of organic materials subject to oxidative, thermal and UV light deterioration.
这些化合物是具有以下公式的三烷基取代的羟基苯基烷基
膦酸酯和
膦酸盐:##
SPC1## 其中R,R.sup.1和R.sup.2分别是低烷基或环烷基,R.sup.3是烷基,烷基上取代有一个卤素原子,苯基,苯基上取代有烷基,烷氧基,烷氧基上取代有一个卤素基,苯氧基,苯氧基上取代有烷基,烷
硫醚氧基,烷氧基上取代有烷基,R.sup.4是烷基,烷基上取代有一个卤素原子,环烷基,苯基,苯基上取代有烷基,烷
硫基乙基,
硫代双烷基,亚烷基,多价环烷基或非环烷基烃基,A是低烷基烷基,n为1至4。这些化合物通常通过将三烷基取代的羟基苯甲基或羟基苯基烷基卤化物与适当的三烷基或三芳基
膦酸酯或适当的取代
膦酸酯反应制备而成。这些化合物可用作有机材料的稳定剂,以防止氧化、热和紫外光恶化。