WO2018236320A2 - An antiperspirant formulation in aerosol form - Google Patents

Abstract

The present invention relates to an antiperspirant formulation designed in aerosol form which comprises the processes of mixing carrier agent, emollient and whiteness reducing ester and suspending agent by adding one after another, adding antiperspirant active while the mixing process continues, then adding the perfume and finally homogenization of the mixture; which prevents the creation of white stain that can occur on the textile during use by means of its composition including dibutyl adipate while inhibiting perspiration and unwanted body smells that occurs as a result of perspiration.

Description

AN ANTIPERSPIRANT FORMULATION IN AEROSOL FORM Field of the Invention

The present invention relates to a novel formulation in aerosol form comprising a high amount of antiperspirant active which minimizes whiteness that occurs on the textile during and after use. Background of the Invention

Until today, the deodorants offered to consumers are in a form that responds two different needs, namely preventing sweating or inhibiting unwanted bad smell occurring due to sweating. While some products have both of these two basic functions, some products are intended to provide only one of these functions. While the bad smell inhibitory formulas provide this property with antibacterial actives or perfume raw materials, the main basis of the antiperspirant function is generally antiperspirant actives in form of aluminum/chlorine/hydrate. The most commonly used derivatives are aluminum chlorohydrate, aluminum sesquichlorohydrate, and aluminum zirconium chlorohydrate GLY raw materials.

Perspiration enables the body temperature to be kept fixed at about 37°C by providing thermal regulation; it also causes bad smell to occur as a result of the activation between the secretion of the sweat glands and the bacteria. The sweat glands are present right under the skin surface, and they are divided into two main classes, namely eccrine and apocrine. The eccrine glands, spreading throughout the body and present in large numbers, secrete an odorless, dilute, electrolyte solution that performs the essential function for thermal regulation. The main source of bad smell is the apocrine secretion, which is rich in organic materials, is generally concentrated under the armpit and thus creates a warm and humid environment suitable for bacteria. Eccrine glands also create a humid environment and indirectly trigger the generation of bad smell by contributing the dispersion of apocrine secretion.

Antiperspirants are presented to consumers in aerosol deodorant, roll-on deodorant and stick form. In roll-on forms, generally antiperspirant active in hydrated aluminum chlorine form is emulsified in a cosmetic liquid formula together with perfume. In stick form, the structure is created by antiperspirant active creating a suspension in solid form instead of emulsion. In aerosol antiperspirant products constituting a larger part of the market, the use of the product is achieved by spraying antiperspirant active comprising aluminum suspended in homogenous liquid form with propellant LPG gas mixture. The general objective in these different forms can be summarized as involving the antiperspirant active that will suppress the perspiration enough in the formula, creating a homogenous structure, minimizing white residues that can occur as white powder especially in dark colors and black garments during use.

In the literature the raw materials defined as antiperspirant active can be aluminum chloride, aluminum chlorohydrate, aluminum chlorohydrex, aluminum chlorohydrex PG, aluminum chlorohydrex PEG, aluminum dichlorohydrate, aluminum dichlorohydrex PG, aluminum dichlorohydrex PEG, aluminum sesquichlorohydrate, aluminum sesquichlorohydrex PG, aluminum sesquichlorohidrex PEG, aluminum sulfate, aluminum zirconium octochlorohydrate, aluminum zirconium octochlorohydrex GLY, aluminum zirconium pentachlorohydrate, aluminum zirconium pentachlorohydrex GLY, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate, aluminum zirconium tetrachlorohydrate GLY and aluminum zirconium trichlorohydrate GLY. In all of these formulas, moisturizers, volatile silicones and different raw materials with similar structures are used in order to facilitate the application and leave a soft, non-greasy feel on the skin. The structure obtained as a result should be dermatologically compatible with the skin of the user, and it should be specifically examined in terms of particle size/human and environmental health in aerosol forms.

One of the key criteria for antiperspirant products, the goal of minimizing white residue formation as much as possible has become increasingly important in recent years, and this has resulted in the diversification of the products offered to consumers more in this direction. For this purpose, it has been started to integrate hydrocarbon compounds with different polymer structures, ester structures, and silicone derivatives in a straight or ring structure into the antiperspirant formulations.

Raw materials classified in this group in the literature and used in practice are isostearyl isostearate, glycerate-7-benzoate, C12-15 alkyl benzoate, octyldodecyl benzoate, isostearyl lactate, isostearyl palmitate, benzyl laurate, laurate 4, laurate 7, oleate 2, PEG 4, PEG 12, isopropyl myristate, isopropyl palmitate, butyl stearate, polyethylene glycol methyl ethers, PPG 2 cetearate 9, PPG 2 isodecet 12, PPG 5 butyl ether, PPG 14 butyl ether, PPG 15 butyl ether, PPG 53 butyl ether, octyldodecanol, polydecene, mineral oils, vaseline, phenyltrimethicone, dimethicone copolyol and mixtures thereof. For example, in United States Patent Document no US5194249A, it is claimed that the formula which is not in aerosol form formulated with propylene glycol stearate in range of 1-30% and ethoxylated stearyl alcohol emulsifiers comprises non-volatile dimethicone in range of 2-20%, aluminum salt in range of 10-60% and water up to 70% forms a structure which prevents whiteness. In another patent no US5840289A, it is claimed that formula wherein one or more raw materials from the group of raw materials showing whiteness masking properties such as aluminum chloride activated by milling, not having a hollow structure, having a regular refractive index value in the range of 1.52 - 1.57 and benzoate esters having a refractive index value of 1.40 - 1.57, hydrogenated polybutane, PPG- 14 butyl ether, isopropyl palmitate, phenyl silicone and isopropyl myristate are used has a whiteness reducing effect. Patent no US20100104517A1 discloses an antiperspirant formulation in nonaquous aerosol form wherein ethanol in ratio of 40% minimum is used, aluminum chlorohydrate is used in an amount of 1%- 15% as an antiperspirant active, and which also comprises a volatile silicone and an organic softening agent and which minimizes white stains.

The research we conducted is that the literature studies on the use of dibutyl adipate for the purpose of decreasing the whiteness have not been performed yet. Summary of the Invention

The primary objective of the present invention is to define the formula content that enables to minimize white residue release effect on clothing that is considered one of the most fundamental problems in aerosol antiperspirant products.

Another objective of the present invention is to define the formula content in aerosol form having whiteness reducing effect using an emollient raw material in diester form.

A further objective of the present invention is the development of a whiteness reducing formulation in aerosol form wherein adipic acid and dibutyl adipate which is a butyl alcohol diester are used.

Detailed Description of the Invention With reference to the present invention, the flow diagram illustrating the details of the production method carried out in order to obtain the targeted formulation is given in Fig. 1.

An inventive antiperspirant formulation in aerosol form, which prevents white stain that can occur on the textile during use while inhibiting perspiration and unwanted body smells resulting from this, is obtained by steps of

- mixing suspending clay agent, carrier agent and esters,

- adding antiperspirant active while the mixing process continues,

- adding the perfume following this,

- homogenization of the final mixture,

and it is comprised of volatile and non-volatile silicone as carrier agent, hectorite clay as suspending agent, emollient and whiteness reducing esters, aluminum salts as antiperspirant active.

For this purpose, the suspending clay agent, the carrier agent and the esters are added to each other at a rate of 50-500 rpm, preferably 300 rpm. Volatile and non-volatile silicones, cyclo penta siloxane and dimethicone are preferred as carrier agent. Hectorite clay is used as suspending agent, and isopropyl palmitate and C12-15 alkyl benzoate are used as emollient ester. Dibutyl adipate is preferred as whiteness reducing ester which constitutes the primary claim of the invention.

Antiperspirant active in form of aluminum salt, preferably aluminum chlorohydrate and/or aluminum sesquichlorohydrate is added while the mixing continues. An antiperspirant formulation in aerosol form comprises dibutyl adipate in ratio of 10-15% by weight as whiteness reducing ester. After addition of the antiperspirant active, mixing process is completed by adding the perfume; the mixing process lasts for a total of 10-15 minutes and homogenization process is carried out for 2-5 minutes at high speed, preferably at 3500 rpm in the last step of the process.

In this method, the component distribution of the formula in aerosol form apart from propellant gases comprises 5-30%, preferably 10-15% for each one of cyclo penta siloxane, isopropyl palmitate and dibutyl adipate; 1-20%, preferably 3-10% for each one of hectorite clay, C12-15 alkyl benzoate and dimethicone; 20-60%, preferably 40-50% for aluminum chlorohydrate and/or aluminum sesquichlorohydrate, 1-5%, preferably 1-2 % for the perfume.

The said formula is designed to be compatible with pressurized container form with the addition of propellant gas. The composition has the primary claim to prevent white stain that can occur on the textile during use while inhibiting perspiration and unwanted body smells resulting from this by means of a new content.

Claims

An antiperspirant formulation in aerosol form, which prevents white stain that can occur on the textile during use while inhibiting perspiration and unwanted body smells resulting from this, obtained by the steps of

- mixing suspending clay agent, carrier agent and esters,

- adding antiperspirant active while the mixing process continues,

- adding the perfume following this,

- homogenization of the final mixture, and

and wherein volatile and non-volatile silicone is used as carrier agent, hectorite clay emollient and whiteness reducing esters are used as suspending agent, aluminum salts are used as antiperspirant active.

An antiperspirant formulation in aerosol form according to claim 1, wherein the volatile and nonvolatile silicones as carrier agent are cyclo penta siloxane and dimethicone.

An antiperspirant formulation in aerosol form according to claim 1, wherein isopropyl palmitate and C12-15 alkyl benzoate are used as emollient ester.

4. An antiperspirant formulation in aerosol form according to claim 1, wherein dibutyl adipate is used as whiteness reducing ester.

5. An antiperspirant formulation in aerosol form according to claim 1, wherein aluminum chlorohydrate and/or aluminum sesquichlorohydrate is used as antiperspirant active.

An antiperspirant formulation in aerosol form according to claim 1, comprising dibutyl adipate in ratio of 10-15% by weight as whiteness reducing ester.

An antiperspirant formulation in aerosol form characterized by the preceding claims, wherein it comprises

cyclo penta siloxane, isopropyl palmitate and dibutyl adipate each one in range of 5-30%, hectorite clay, C12-15 alkyl benzoate and dimethicone again each one in range of 1-20%, aluminum chlorohydrate and/or aluminum sesquichlorohydrate in range of 20-60%, and perfume in range of 1-5%.