# US 11,998,624 B2 · Anhydrous antiperspirant aerosol composition

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- Number: US 11,998,624 B2
- Document ID: US11998624B2
- Status: Granted
- Kind: B2
- Application number: 16/640,594
- Filed: 2018-08-09
- Published: 2020-06-04
- Granted: 2024-06-04
- Earliest claimed: 2017-08-23
- Assignees: Conopco, Inc.
- Applicants: Conopco, Inc.
- Inventors: Anne-Laure Sophie Ferry; Robert Edward Marriott; Louise Jannette Roberts
- Web page: https://patentgrep.com/patent/US11998624B2

## CPC

- A61K 8/046: {Aerosols; Foams}
- A61K 8/26: Aluminium; Compounds thereof
- A61K 8/42: Amides
- A61K 8/585: {Organosilicon compounds}
- A61K 8/92: Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
- A61Q 15/00: Anti-perspirants or body deodorants (deodorisation of air A61L9/00)
- A61K 2800/31: Anhydrous
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

Anhydrous antiperspirant aerosol compositions comprising antiperspirant active, urea, non-ethanolic carrier oil and volatile propellant, said compositions delivering good perspiration reduction and humectancy, without valve blockage of associated hardware.

## Claims

### Claim 1

A base composition for an antiperspirant aerosol comprising:
a) less than 0.1% by weight of free water,
b) 20 to 50% by weight of antiperspirant active that is an aluminium halohydrate salt,
c) 2 to 15% by weight of urea, and
d) 35 to 65% by weight of a non-ethanolic carrier oil selected from the group consisting of silicone oils, alkyl ether oils, triglycerides, ester oils, and mixtures thereof,
wherein the non-ethanolic carrier oil is a water insoluble organic material that is liquid at ° C.,
wherein the base composition is free of ethanol and further wherein the base composition has a viscosity of less than or equal to 10000 cPs (mPa·s) measured at ° C. using a Brookfield Viscometer 24 hours after sample preparation, using a TA spindle, at 10 rpm, and further wherein urea possesses a % change in mass value measured at 37° C. and 90% relative humidity using Dynamic Vapour Sorption instrument greater than or equal to the value for PEG-4.

### Claim 2 (depends on 1)

The base composition according to claim 1, comprising 3 to 12% by weight of urea.

### Claim 3 (depends on 1)

The base composition according to claim 1 having a viscosity of between 2500 and 7500 cPs (mPa·s).

### Claim 4 (depends on 1)

The base composition according to claim 1, wherein the aluminium halohydrate salt is aluminium sesquichlorohydrate having a chemical formula Al2OH4.4Cl1.6 to Al2OH4.9Cl1.1 and further comprising water-soluble calcium salt and amino acid.

### Claim 5 (depends on 1)

The base composition according to claim 1, wherein the non-ethanolic carrier oil is a volatile silicone oil.

### Claim 6 (depends on 1)

The base composition according to claim 1, further comprising a suspending agent.

### Claim 7 (depends on 6)

The base composition according to claim 6, wherein the suspending agent comprises hydrophobically modified clays.

### Claim 8 (depends on 1)

The base composition according to claim 1, comprising 30 to 50% by weight of antiperspirant active.

### Claim 9 (depends on 1)

The base composition according to claim 1, wherein the aluminium halohydrate salt comprises aluminium chlorohydrate, activated aluminium chlorohydrate, activated aluminium sesquichlorohydrate or a mixture thereof.

### Claim 10 (depends on 1)

The base composition according to claim 1, wherein the antiperspirant active is activated.

### Claim 11 (depends on 1)

The base composition according to claim 1, comprising 45 to 65% by weight of non-ethanolic carrier oil.

### Claim 12 (depends on 1)

The base composition according to claim 1 having a viscosity of between 2600 and 7000 cPs (mPa·s).

### Claim 13 (depends on 1)

The base composition according to claim 1 having a particle size not greater than 125 μm.

### Claim 14 (depends on 1)

The base composition according to claim 1 having a particle size not greater than 100 μm.