| abstract |
Water-soluble compounds of the general formula (A - Y -)nZ(-SO3 M )m WHEREIN A represents the radical of a sterically hindered phenol of the benzene series, Y represents a bridge wherein the acyclic bridging member contains a carboxylic acid amide group as chain member, Z represents an aliphatic radical or a carbocyclic aromatic radical, containing at most two mono- or bi- cyclic nuclei, M represents one equivalent of a cation solvatizable by water, and M AND N INDEPENDENTLY OF EACH OTHER REPRESENT 1 OR 2, AND THEIR WATER SOLUBLE SALTS ARE DISCLOSED AS ANTIOXIDANTS USEFUL FOR THE STABILIZATION OF ORGANIC POLYMERS CONTAINING BASIC GROUPS AGAINST DETERIORATION DUE TO HEAT AND/OR OXYGEN. In contrast to known stabilizing agents, the novel compounds need not be incorporated into the polymerization or polycondensation process for producing the materials to be protected or into a melt of such materials but can be applied to the finished organic products in an after-treatment, for instance by drawing thereon from an aqueous bath. |