Antiperspirant composition and method of preparation

A method for preparing an aluminum zirconium hydroxy halide glycinate complex having the empirical formula:

• Al.sub.2 (OH).sub.6-y X.sub.y /ZrO (OH).sub.x Cl.sub.2-x /Neutral Amino Acid
• wherein x has a numerical value from 0 to 1.5, y has a numerical value from 0.7 to 3.0 and X is chlorine, bromine or iodine which comprises:
• (a) introducing an aqueous solution of Component A comprising 8-35% of a basic aluminum halide at a temperature of 45 to 100.degree. C. and having the empirical formula:
• Al.sub.2 (OH).sub.6-y X.sub.y .multidot.nH.sub.2 O
• wherein y has a numerical value from about 0.7 to about 3, X is chlorine, bromine or iodine, and n has a numerical value from about 0.8 to about 4, and whose polymer distribution as characterized by a size exclusion chromatography test has at least 20% of its polymers in Band III and 100% of the aluminum containing polymers in Bands II, III and IV;
• (b) introducing an aqueous solution of Component B comprising a 20-55% solution of zirconyl hydroxychloride having the empirical formula:
• ZrO (OH).sub.x Cl.sub.2-x
• wherein x is a numerical value of from 0 to 1.5;
• a neutral amino acid being included in the solutions of either or both of Components A and B;
• (c) mixing component A and Component B at a temperature of from 50.degree. C. to 100.degree. C. for a time period of less than 2 hours to form a combined solution, thereby forming a complex of Component A and Component B;
• and
• (d) spray-drying the complex to a powder having a polymer distribution as characterized by the size exclusion chromatography test of:
• (1) a peak height ratio of peak 4 to peak 3 of 0.5 to 1.8:1, and
• (2) peaks (1+2) of less than 4% of the polymer distribution by weight.