Glycerol phosphites esterified with phenolcarboxylic acids

Compounds of the formula ##STR52## in which A and A' each are a monovalent radical of the structure ##STR53## or, together, represent a monovalent radical of the structure ##STR54## in which radicals X is oxygen or no substituent;

• Y is --O--, --S-- or --NR""--(R""=H or C.sub.1 to C.sub.20 -alkyl);
• R is a linear alkyl group having from 12 to 30 carbon atoms or, in the case of Y=--O--, alternatively a linear .beta.-hydroxyalkyl group having from 12 to about 30 carbon atoms, or a 3-thia-5-hydroxyalkyl group having from 12 to about 32 carbon atoms, or a mono- or di -C.sub.12 to C.sub.30 -fatty acid ester of the dihydroxypropyl radical;
• --Y.sup.1 --R.sup.1 is either --Y--R or a radical of the structures ##STR55## R', R" and R"', independently from each other, are H or C.sub.1 to C.sub.4 -alkyl;
• B is a chemical bond or (a) the radical of a linear or branched, unsubstituted or phenylsubstituted alkane having from 1 to 20 carbon atoms or (b) of an unsubstituted or C.sub.1 -C.sub.5 -alkylsubstituted cycloaliphatic alkane having from 5 to 12 carbon atoms, or (c) of an unsubstituted or C.sub.1 -C.sub.12 -alkylsubstituted aromatic hydrocarbon having 6 or 10 carbon atoms, or (d) a --B'--O--B" group, or (e) a ##STR56## group;
• B' being a chemical bond or the radical of a linear, branched or cyclic, unsubstituted or phenylsubstituted alkyl having from 1 to 20 carbon atoms or of an unsubstituted or alkylsubstituted phenyl radical, and B" being a chemical bond or a linear or branched alkyl radical having from 1 to 6 carbon atoms;
• and
• m and n each are either 1 or 2.