Abstract: Basic aluminum chloride (BAC) and aluminum zirconium antiperspirant active of enhanced efficacy are proposed. The acid activated aluminum-zirconium composition having low contents of both glycine and zirconium with Band III/II ration of less than 0.5 is found to provide higher efficacy than the corresponding heat activated aluminum zirconium antiperspirant salt with high HPLC Band III/II ratio and having high contents of both glycine and zirconium at similar M/Cl ratio. According to present invention, the interactions between amino acid such as glycine and aluminum species in BAC and aluminum-zirconium solutions greatly reduce the effective amount of aluminum monomer species, which attributed to the reduced efficacy and stability of the corresponding solutions. The aluminum and aluminum-zirconium antiperspirant salt compositions of enhanced efficacy have low molar ratio of amino acid/or buffer to metal(s) of 0.2 and preferably less than 0.15, with metal(s) to chloride molar ratio of at least 1.1.

Abstract: A process is provided for the preparation of a novel polyaluminum calcium hydroxychloride composition of enhanced efficiency for water treatment, paper sizing, and antiperspirant applications. The polyaluminum calcium hydroxychloride compositions are prepared via the acidification of higher basicity reaction products to form mid-to-high basicity final products. Two methods are provided for the preparation of higher basicity products, contemplated in the first, and an aqueous acid solution, such as hydrochloric acid, aluminum chloride, or a mixture thereof, is mixed with a strong alkaline calcium salt such as calcium oxide or calcium carbonate and aluminum powder at temperatures greater than 60° C. In a second method, bauxite, aluminum hydrate, or aluminum metal, and calcium aluminate are mixed with hydrochloric acid and are reacted at high temperatures and/or elevated pressures for a certain period of time whereby, when the reaction is complete, the mixtures are filtered to obtain clear solutions.

Abstract: Novel aluminum antiperspirant compositions of enhanced efficacy activated by both heat and acid are produced comprising basic aluminum salts of having the formula: Al2(OH)6-aXa ?wherein X is Cl?, Br?, l?, or NO3?, a is from abut 1.1 to about 1.7, with basic aluminum chloride being the preferred salt. When analyzed by SEC-HPLC at about 10% concentration (i.e., by 2% Al) in water, these compositions exhibit an SEC-HPLC Band I area of less than 10%, a Band III area of at least 20%, with a Band III/II area ratio of at least 0.7, a Band IV area of at least 20%, and have at least 60% aluminum species contained in Bands III and Band IV.

Abstract: A novel aluminum antiperspirant active composition of enhanced efficacy is provided. The composition is activated by both heat and acid and characterized by having high HPLC Band III and high HPLC Band IV, prepared by the addition of an acid such as AlCl3 to (1) the aluminum calcium and/or strontium betaine solutions, where the calcium and/or strontium is derived from a soluble salt such as calcium and/or strontium chloride or nitrate and (2) the aluminum calcium and/or strontium glycine and/or betaine solutions, where calcium and/or strontium is from strongly alkaline calcium/strontium oxide or hydroxide. The novel aluminum compositions derived according to the invention have HPLC Band I of less than 2%; a Band III of at least 20%; a Band III/II ratio of at least about 0.7; and a Band IV of at least 20%.

Abstract: Aluminum and aluminum-zirconium antiperspirant compositions comprising basic aluminum chlorides that have a particular molecular size distribution defined by having an SEC-HPLC Band III/II ratio of at least 0.5, having SEC-HPLC Band III plus Band II area of at least 70% of the total area and having SEC-HPLC Band I content no more than 5% and containing betaine (trimethylglycine), calcium and/or strontium are disclosed. Also disclosed are the methods of making these compositions and the use thereof in consumer acceptable antiperspirant vehicles such as aerosols, gels, roll-on, sticks and soft solids.

Abstract: Antiperspirant actives of aluminum and aluminum-zirconium of enhanced efficacy containing strontium and an amino acid that have a stable high HPLC Band III/II ratio are disclosed. The invention also discloses method for making the antiperspirant actives.

Abstract: An amino acid free stable aluminum zirconium polyhydric alcohol aqueous solution having a high anhydrous antiperspirant solid concentration and a high percentage of low molecular weight aluminum species, i.e., containing 60% or more of band IV peak area based on high pressure liquid chromatography, is prepared by adding a zirconium salt to an aqueous polyhydric alcohol solution of a basic aluminum chloride.

Abstract: Aluminum and aluminum-zirconium antiperspirant compositions of enhanced efficacy and a pH value of at least 3.5 are provided that are made by reaction with insoluble, strongly alkaline strontium or calcium salts. The aluminum and aluminum-zirconium strontium or calcium compositions show high pH values with characteristic HPLC Band III to Band II ratios of at least 0.5. The basic aluminum halohydrate (or nitrate) solutions typically have aluminum to anion ratio of less that 1.9. The solution compositions are stable with respect to both HPLC Band III to Band II ratio and viscosity at concentrations of about 20% to about 40% by weight of anhydrous solid. The solid state compositions form hard sticks with low irritation, at low metal to chloride ratios of about 0.9 to about 1.2.

Abstract: A stable aluminum-zirconium aqueous solution of enhanced efficacy having a high concentration free of amino acid and polyhydric alcohol is disclosed. Such aluminum-zirconium salts are selected from aluminum/zirconium tetrachlorohydrate; aluminum/zirconium pentachlorohydrate, and aluminum/zirconium octachlorohydrate in which the aluminum to zirconium (Al/Zr) atomic ratio of said salt falls within the limits of the shaded areas A, B, and C, respectively, of the drawing graph wherein the aluminum/zirconium tetrachlorohydrate has an Al/Zr atomic ratio from about 2 to about 6 and metal/chloride molecular ratio about 0.9 to about 1.25; aluminum/zirconium pentachlorohydrate having Al/Zr atomic ratio from about 6 to about 10 and metal/chloride atomic ratio from about 1.5 to about 1.65; and aluminum/zirconium octachlorohydrate having Al/Zr molecular ratio from about 6 to about 10 and metal/chloride molecular ratio from about 0.9 to about 1.5.

Abstract: A novel efficacious and less irritant aluminum-zirconium antiperspirant composition is provided by the addition of a small amount of AlCl3 and/or HCl to the activated aluminum component. After the heating of diluted basic aluminum chlorohydrate solution, cooling to room temperature, mixing with small amount of AlCl3 or HCl and then reacting with zirconium glycine complex, an aluminum-zirconium salt is produced with a maximum amount of depolymerization aluminum and zirconium species. The addition of a small amount of AlCl3 or HCl to the diluted and activated aluminum chlorohydrate solution accelerates the depolymerization of the activated ACH solution, and upon the addition of zirconium glycinate the solution is further depolymerized and results in the formation of less polymerized zirconium species.

Abstract: Aluminum and aluminum-zirconium antiperspirant compositions of enhanced efficacy and a pH value of at least 3.5 are provided that are made by reaction with insoluble, strongly alkaline strontium or calcium salts. The aluminum and aluminum-zirconium strontium or calcium compositions show high pH values with characteristic HPLC Band III to Band II ratios of at least 0.5. The basic aluminum halohydrate (or nitrate) solutions typically have aluminum to anion ratio of less that 1.9. The solution compositions are stable with respect to both HPLC Band III to Band II ratio and viscosity at concentrations of about 20% to about 40% by weight of anhydrous solid. The solid state compositions form hard sticks with low irritation, at low metal to chloride ratios of about 0.9 to about 1.2.

Abstract: An amino acid free stable aluminum zirconium polyhydric alcohol aqueous solution having a high anhydrous antiperspirant solid concentration and a high percentage of low molecular weight aluminum species, i.e., containing 60% or more of band IV peak area based on high pressure liquid chromatography, is prepared by adding a zirconium salt to an aqueous polyhydric alcohol solution of a basic aluminum chloride.

Abstract: An amino acid free stable aluminum zirconium polyhydric alcohol aqueous solution having a high anhydrous antiperspirant solid concentration and a high percentage of low molecular weight aluminum species, i.e., containing 60% or more of band IV peak area based on high pressure liquid chromatography, is prepared by adding a zirconium salt to an aqueous polyhydric alcohol solution of a basic aluminum chloride.

Abstract: A novel efficacious and less irritant aluminum-zirconium antiperspirant composition is provided by the addition of a small amount of AlCl3 and/or HCl to the activated aluminum component. After the heating of diluted basic aluminum chlorohydrate solution, cooling to room temperature, mixing with small amount of AlCl3 or HCl and then reacting with zirconium glycine complex, an aluminum-zirconium salt is produced with a maximum amount of depolymerization aluminum and zirconium species. The addition of a small amount of AlCl3 or HCl to the diluted and activated aluminum chlorohydrate solution accelerates the depolymerization of the activated ACH solution, and upon the addition of zirconium glycinate the solution is further depolymerized and results in the formation of less polymerized zirconium species.

Abstract: A stable aluminum-zirconium aqueous solution of enhanced efficacy having a high concentration free of amino acid and polyhydric alcohol is disclosed. Such aluminum-zirconium salts are selected from aluminum/zirconium tetrachlorohydrate; aluminum/zirconium pentachlorohydrate, and aluminum/zirconium octachlorohydrate in which the aluminum to zirconium (Al/Zr) atomic ratio of said salt falls within the limits of the shaded areas A, B, and C, respectively, of the drawing graph wherein the aluminum/zirconium tetrachlorohydrate has an Al/Zr atomic ratio from about 2 to about 6 and metal/chloride molecular ratio about 0.9 to about 1.25; aluminum/zirconium pentachlorohydrate having Al/Zr atomic ratio from about 6 to about 10 and metal/chloride atomic ratio from about 1.5 to about 1.65; and aluminum/zirconium octachlorohydrate having Al/Zr molecular ratio from about 6 to about 10 and metal/chloride molecular ratio from about 0.9 to about 1.5.

Abstract: Antiperspirant actives of aluminum and aluminum-zirconium of enhanced efficacy containing strontium and an amino acid that have a stable high HPLC Band III/II ratio are disclosed. The invention also discloses method for making the antiperspirant actives.

Abstract: An amino acid free stable aluminum zirconium polyhydric alcohol aqueous solution having a high anhydrous antiperspirant solid concentration and a high percentage of low molecular weight aluminum species, i.e., containing 60% or more of band IV peak area based on high pressure liquid chromatography, is prepared by adding a zirconium salt to an aqueous polyhydric alcohol solution of a basic aluminum chloride.

Abstract: An improved skin friendly antiperspirant is provided in which a suitable polyhydric alcohol e.g., glycerin, is complexed with the antiperspirant of the type of activated or nonactivated aluminum or aluminum/zirconium salt that are commonly considered antiperspirant active materials and are covered by FDA OTC Tentative Final Monograph as Category I.

Abstract: Stable aluminum-zirconium antiperspirant compositions in polyhydric alcohol solution with enhanced efficacy were made by direct reaction in aqueous solution of a soluble aluminum salt, a zirconium compound, a polyhydric alcohol, aluminum metal and optionally an amino acid buffer, and maintaining the solution at 100-140° C. to form a 20-45% by weight concentration of aluminum-zirconium complexes on an anhydrous basis. A solid product can be obtained by spray drying the product solution.