Antiperspirant compositions

a technology of compositions and antiperspirants, applied in the field of antiperspirant compositions, can solve the problems of white marks, visible white deposits, formulations containing gellants, etc., and achieve the effect of superior properties and low visible residues

Inactive Publication Date: 2002-03-28
UNILEVER HOME & PERSONAL CARE USA DIV OF CONOPCO IN C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0015] We have now found that selected 1,2- and 1,3-substituted cyclohexane derivatives can be used as structurants for antiperspirant compositions. When used as a modest percentage of the composition, typically not more than 15% by weight and often less than 10% by weight, they are able to structure the composition, yet at the same time the composition gives a deposit with a low visible residue.

Problems solved by technology

Sticks which are structured with fatty alcohol tend to leave visible white deposits on application to human skin; moreover the deposits can also transfer onto clothing when it comes into contact with the skin and the wearer can, for example, find white marks at the armhole of the sleeveless garment.
Formulations containing such gellants can suffer from a number of disadvanta

Method used

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Examples

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example 1

Preparation of 1,2-diamidocyclohexane Compounds

[0140] The following general procedure was employed, based on that described by K Hanabusa, M Yamada, M Kimura and H Shirai, in Prominent Gelation and Chiral Aggregation of Alkylamides Derived from Trans-1,2-Diaminocyclohexane, Angew. Chem. Int.Ed. Engl., 35 (17), 1949 (1996).

[0141] The reaction vessel was a three necked one liter round bottom flask equipped with overhead mechanical stirrer, water condenser and 250 ml pressure equalising dropping funnel. 1,2-diaminocyclohexane in 300 mls of toluene was placed in the flask followed by triethylamine. The acid chloride in 150 mls of toluene was placed in the pressure equalising funnel. The solution of the amine was taken to reflux after which the acid chloride was added dropwise. A white dense precipitate (triethylamine hydrochloride) forms almost immediately. After 4 hours of reflux the triethylamine hydrochloride is filtered off whilst the reaction mixture is still hot and the toluene is...

example 2

[0196] A number of suspension stick compositions, as set out in the tables below were prepared. The materials used, and their proprietary names, were as follows:

[0197] 1) Volatile cyclic silicone (cyclomethicone) DC 245 (Dow Corning)

[0198] 2) Polypropyleneglycol 14 butylether (Fluid AP from Union Carbide)

[0199] 3) Polydecene (Silkflo 364 NF from Albemarle)

[0200] 4) Isostearyl alcohol (abbreviated to ISA--Prisorine 3515 from Unichema)

[0201] 5) C12-15 alkyl benzoate (Finsolv TN from Finetex)

[0202] 6) Al / Zr Tetrachlorohydrex glycine complex (AZAG -7167 from Summit).

[0203] 7) 12-hydroxystearic acid (Caschem)

[0204] The method of preparation was as follows:

[0205] The liquids and the structurant(s) were first mixed together in a flask and heated to just above the dissolution temperature of the structurant(s). Gentle stirring was provided with a Hydolph mixer. Once all the structurant was dissolved the antiperspirant active was added and the whole mixture cooled to 5-10.degree. C. above the...

example 3

Emulsion Sticks

[0209] A number of emulsion stick compositions were prepared. Some of the materials used were listed at the beginning of Example 2. Others were

[0210] 8) Cetyl dimethicone copolyol (Abil EM90 emulsifier from Th. Goldschmidt)

[0211] 9) 50% aqueous solution of Al / Zr pentachlorohydrate (Zirkonal 50 from Giulini)

[0212] The liquids and emulsifier were mixed together in a beaker and heated to 5-10.degree. C. above the dissolution temperature of the amido-containing structurant, while gently stirring with a Silverson head. The structurant was added. Next the antiperspirant active phase, preheated to the same temperature, was added slowly. During this addition, the stirring was increased to 8000 rpm. Once the addition was complete the mixture was stirred for a further 5 minutes at 8000 rpm without any cooling. The process was then stopped and the mixture transferred into stick barrels and left at room temperature to cool.

4 Formulation No: 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Parts by we...

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Abstract

Antiperspirant formulations containing an antiperspirant active and a continuous phase comprising a water-immiscible liquid carrier, such as, amongst other materials, cyclomethicones, that is structured using an amido-containing compound of the general formula in which R and R1 each independently denote a branched or unbranched moiety containing 5 to 27 carbon atoms, m and n are each independently, zero or 1, Y is a cyclohexane ring bearing the amido-containing substituent groups in 1,2 or 1,3 positions.

Description

[0001] The present invention relates to antiperspirant compositions for application to human skin, especially the axilla.BACKGROUND OF THE INVENTION AND SUMMARY OF PRIOR ART[0002] A wide variety of cosmetic compositions for application to human skin make use of a thickened or structured liquid carrier to deliver colour or some other active material to the surface of the skin. A significant example of such cosmetic compositions are antiperspirant compositions which are widely used in order to enable their users to avoid or minimise wet patches on their skin, especially in axillary regions.[0003] Antiperspirant formulations have been provided with a range of different product forms. One of these is a so-called "stick" which is usually a bar of an apparently firm solid material held within a dispensing container and which retains its structural integrity and shape whilst being applied. When a portion of the stick is drawn across the skin surface a film of the stick composition is trans...

Claims

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Application Information

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IPC IPC(8): A45D40/26A61K8/02A61K8/26A61K8/28A61K8/34A61K8/42A61K8/58A61Q15/00
CPCA45D40/26A61K8/042A61K8/26A61K8/28A61K8/34A61K8/342A61K8/42A61K8/585A61Q15/00
Inventor BHATIA, SHAMEEMFRANKLIN, KEVIN RONALDSTOIMENOF, LARA DIMITROVAWHITE, MICHAEL STEPHEN
Owner UNILEVER HOME & PERSONAL CARE USA DIV OF CONOPCO IN C
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