METHOD OF STABILIZING ORGANIC PHOSPHITE AND/OR PHOSPHONITE AGAINST HYDROLYSIS AND STABILIZED COMPOSITION Russian patent published in 1998 - IPC

FIELD: organophosphorus compounds. SUBSTANCE: stabilization is achieved by adding sterically hindered amine containing group represented by formula or , wherein G is hydrogen or methyl; G₁ and G₂ are hydrogen, methyl, or, together, form oxygen atom, in amounts ensuring 0.1 to 25.0 wt % content of this amine in stabilized organic phosphite and/or phosphonite. Stabilized composition contains 80-99.9 wt % phosphite and/or phosphonite and 0.1-20 wt % sterically hindered amine. EFFECT: sharply increased hydrolysis stability of phosphites and/or phosphonites. 9 cl, 2 tbl, 21 ex