Zirconium-aluminum-polyol buffered anti-perspirant complexes

Claim 1

An astringent, water soluble complex formed by reacting in an aqueous medium: a. a basic aluminum-polyol compound, selected from the group consisting of complexes having the following general empirical formulas: Al.sub.2 (H.sub.2 O).sub.y-z (OH).sub.6-nx (A).sub.n (R).sub.z ( 1) wherein A is selected from the group consisting of chloride, bromide, iodide, sulfate and sulfamate; R is the coordinating moiety of a polyhydroxy compound having a carbon chain in which at least two carbon atoms link a hydroxyl group to said chain; n is a positive integer of from 1 to 4; x is the valence of A, y has a value of about 0.5 to 6 and is always such that (y-z) does not give a negative value; and z is the number of available coordination sites, with nx being from 1 to 4, nQ.Al.sub.2 (OH).sub.4-5 A.sub.1-2 R.sub.1-4 (H.sub.2 O).sub.0.5-4 wherein Q is selected from the group consisting of zinc chloride, zinc iodide, zinc bromide, zinc hydroxy chloride, zinc hydroxy iodide, zinc hydroxy bromide, zirconyl chloride, zirconyl bromide, zirconyl iodide, zirconyl hydroxy bromide, zirconyl hydroxy iodide and zirconyl hydroxy chloride; A is an anion selected from the group consisting of chloride, bromide and iodide; R is the coordinating moiety of a polyhydroxy compound having at least two carbon atoms to which are attached at least two hydroxy groups, and n is the number of moles of Q and is at least 0.05, and mixtures of (1) and (2); b. a zirconium compound selected from trioxodizirconium salts and the group having the general empirical formula: ZrO(OH).sub.2-nz B.sub.z wherein z may vary from 0.9 to 2, n is the valence of B, 2-nz is greater than or equal to 0, and B is selected from the group consisting of halide, nitrate, sulfamate, sulfate and mixtures thereof; and c. an organic buffer selected from the group consisting of urea, an amino acid in which the number of amino groups is equal to the number of carboxyl groups in the molecule, an alkaline salt of said amino acids, hydroxy aluminum salt of said amino acid, and mixtures thereof, said zirconium and basic aluminum-polyol compounds being present in such amounts as to yield an Al/Zr mole ratio of about 10:1 to 1:10, and said organic buffer being present in such an amount that the pH of a 5 to 15 weight percent (based on the oxides of Al and Zr) aqueous solution of the complex is at least about 3; and drying the reaction mixture to a friable solid which is said complex.