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Aluminum-free antiperspirant/deodorant composition

A technology for antiperspirant actives and compositions, which can be applied in the directions of deodorization, disinfection, and cosmetic preparations, and can solve problems such as unreliability

Active Publication Date: 2019-08-06
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Phinney reported in U.S. Patent No. 5,512,274 that zinc salts will precipitate as hydroxides in the pH range of 6.5 to 8.0 and has demonstrated irregular behavior, acting as an antiperspirant only for very irregular periods of time valid, which makes them unreliable

Method used

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  • Aluminum-free antiperspirant/deodorant composition
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  • Aluminum-free antiperspirant/deodorant composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Example 1: Preparation of Aluminum-Free Antiperspirant / Deodorant Compositions Containing Zinc Oxide

[0100]Aluminum-free antiperspirant / deodorant compositions containing added zinc oxide are oil-in-water emulsions consisting of an aqueous phase and an oily phase. The method for preparing this formulation is as follows:

[0101] Prepare the aqueous phase: Add deionized water to a beaker and heat to 70 °C. Then, the Steareth-20 and Glycerin were added and mixed until dissolved. Finally, octane glycol was added and mixed for 5 minutes.

[0102] Prepare the oil phase: In a separate beaker add steareth-2, soybean oil, diisopropyl adipate and neopentyl glycol and heat to 60°C while stirring.

[0103] Creation of the emulsion: Add the oil phase to the water phase while homogenizing with a Greeco homogenizer at 55 rpm for 3 minutes. While homogenizing, add zinc oxide. After homogenization the batch was cooled to 30°C.

[0104] Another composition was prepared using the...

Embodiment 2

[0117] Example 2: Effect of Steareth-2 on Zinc Affinity

[0118] A procedure similar to that described in Example 1 was used except that the amount of steareth-2 in the antiperspirant / deodorant composition was varied from 1% to 4% by weight and the amount of water was varied accordingly so that the total amount remains 100% by weight. Table 4 shows the composition used and zinc affinity as a function of the amount of steareth-2.

[0119] Table 4 summarizes the effect of the amount of steareth-2

[0120]

[0121]

[0122] As shown in Table 4 above, Examples 2.1-2.3 show that increasing the amount of Steareth-2 from 1 to 4% by weight while keeping the amounts of Zinc Oxide and Steareth-20 constant resulting in a dramatic increase in zinc affinity from 5.5 to 18.6 pmol.

[0123] Comparing Example 2.4 with 2.2 and 2.5 shows the effect of steareth-20 on zinc affinity. It should be noted that at constant amounts of steareth-2 and zinc oxide, as the amount of steareth-20 ...

Embodiment 3

[0126] Example 3: Effect of Zinc Oxide on Zinc Affinity

[0127] A procedure similar to that described in Example 1 was used, except that the amount of zinc oxide in the antiperspirant / deodorant composition was varied from 0% to 10% by weight and the amount of water was varied accordingly so that the total amount remained 100% by weight. Table 5 shows the compositions and zinc affinities used.

[0128] Table 5 summarizes the effect of the amount of zinc

[0129]

[0130]

[0131] As shown in Table 5, an increase in zinc affinity was found as the amount of zinc was increased from 0% to 4% by weight. Zinc affinity is not linearly related to the amount of zinc oxide. When it exceeds 1.5% by weight, the zinc affinity is almost constant and does not change with a further increase in the amount of zinc oxide. This shows that when delivered in the oil-in-water base composition of the present disclosure, it is not necessary to apply too much zinc oxide to allow higher leve...

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Abstract

An aluminum-free antiperspirant / deodorant composition is disclosed. The antiperspirant / deodorant may include an oil-in-water emulsion base and an antiperspirant active dispersed in the oil-in-water emulsion base. The antiperspirant active may be primarily a zinc-based antiperspirant active and the oil-in-water emulsion base may include an emulsifier comprising a mixture of steareth-2 and steareth-20, plant-based oil, a polyol, and water.

Description

Background technique [0001] Roll-on antiperspirant / deodorant products currently on the market are typically emulsions that employ a suspension of antiperspirant actives in the formulation. Various metal salts, such as zinc, iron, and aluminum salts, have been used as antiperspirant actives, with aluminum and zirconium hydrated chlorides and chlorides being the most commonly used antiperspirant actives. However, it is increasingly desirable to replace these salts with other active metal salts. Zinc, which has antimicrobial properties, has been explored as a possible candidate to replace aluminum. However, Phinney reported in U.S. Patent No. 5,512,274 that zinc salts will precipitate as hydroxides in the pH range of 6.5 to 8.0 and has demonstrated irregular behavior, acting as an antiperspirant only for very irregular periods of time valid, which makes them unreliable. The sporadic efficacy of zinc salts is speculated to be due to various factors, such as lack of hydrolytic c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/27A61K8/34A61K8/39A61K8/44A61Q15/00A61K8/86A61K8/92A61K8/06A61K8/19
CPCA61K8/27A61K8/345A61K8/39A61Q15/00A61K8/86A61K8/922A61K8/062A61K2800/596A61K8/06A61K8/19A61K8/34A61K8/44A61K8/92A61K8/85A61K2800/30
Inventor 小彼得·R·希利亚德沙伦·肯尼迪克里斯蒂娜·别利理查德·P·亚当斯
Owner COLGATE PALMOLIVE CO