Drug – bio-affecting and body treating compositions – Anti-perspirants or perspiration deodorants
Reexamination Certificate
1997-06-20
2001-04-24
Prats, Francisco (Department: 1651)
Drug, bio-affecting and body treating compositions
Anti-perspirants or perspiration deodorants
C424S066000, C424S067000, C424S068000
Reexamination Certificate
active
06221345
ABSTRACT:
The invention relates to antiperspirant or deodorant compositions, but in particular to antiperspirant compositions, comprising a moisturising cream suitable for topical application to human skin.
The deodorant and antiperspirant market is dominated with products based on aluminium or zirconium salts which are intended to prevent, or at least control, perspiration at the skin surface, particularly on the underarm, whilst often simultaneously providing a perceived degree of deodorancy.
Antiperspirant and deodorant compositions are utilised in many product forms e.g. roll-ons, creams, sticks, aerosols and pump sprays. However all forms suffer from a number of common disadvantages.
A principal disadvantage of many deodorants and antiperspirants is their perceived skin unfriendliness. More particularly, the presence of volatile carriers such as volatile silicones and ethanol, and indeed deodorant and antiperspirant actives is perceived to have a drying and tightening effect on a user's skin following application, resulting in dry skin, reduced skin elasticity and an unpleasant skin sensation.
Many deodorants and antiperspirants can also result in a stinging sensation on the skin following application due to the presence of astringent, skin drying materials such as ethanol. Stinging is a particularly problematic when a deodorant or antiperspirant is applied following shaving.
The above disadvantages deter many consumers from utilising deodorants and antiperspirants thereby depriving the consumer of the benefits to be derived from such cosmetics.
An object of the invention is to provide such a composition which has excellent antiperspirant or deodorant efficacy, excellent cosmetic properties and aesthetics such as comfort in use, smoothness on application, and non-skin drying. The moisturising cream in the composition may also provide moisturising effect.
A further object of the invention is to provide a deodorant or antiperspirant composition which also exhibits reduced stinging upon application, and has low irritation potential. According to the invention there is provided a antiperspirant or deodorant cosmetic composition suitable for topical application to the human skin, comprising:
i. an antiperspirant or deodorant active;
ii. a moisturising cream; and optionally
iii. a carrier for the antiperspirant or deodorant active.
Preferably, an antiperspirant active comprises 5-25% by weight of the composition. Normally the antiperspirant or deodorant composition will additionally comprise a carrier for the antiperspirant or deodorant active, though it is envisaged in certain circumstances, in particular in a cream product formulation, that the composition may comprise a moisturising cream base in which is dissolved or suspended the antiperspirant or deodorant active.
It is a highly preferred aspect of the invention that the composition is an antiperspirant one, in particular one in which the antiperspirant active is based on either aluminium or aluminium/zirconium salts. It has surprisingly been found that moisturizing creams can be combined with antiperspirant actives in topical compositions to provide compositions which are stable.
In certain preferred embodiments, the moisturising cream is a carrier for the active. Also in certain embodiments, the cream can comprise at least 25% by weight of the composition.
In a preferred embodiment, the composition does not contain short chain monohydric alcohols, in particular ethanol, which may be responsible for stinging of the antiperspirant or deodorant compositions, as well as contributing to the drying of the skin.
In another aspect of the invention, there is provided an antiperspirant composition comprising an antiperspirant active, a volatile carrier for the active and a moisturising cream. Also in certain embodiments, the moisturising cream comprises a non-volatile carrier for the antiperspirant carrier.
Advantageously, the composition comprises non-volatile emollients.
In a preferred embodiment, and in particular for cream, roll-on or pump spray product forms, the invention provides an antiperspirant or deodorant composition suitable for topical application to the human skin, comprising:
i. 1-25% by weight of the total composition of an antiperspirant or deodorant active;
ii. 1 to 90% (more preferably 5 to 80%) by weight of the total composition of water; and
iii. 0.1 to 95% (more preferably 5 to 30%) by weight of a moisturising cream.
The moisturising cream component of the compositions according to the invention may comprise an hygroscopic material known as humectant, which may be preferably a polyol or an alcohol, and may be present at a level of 0.1 to 50%, preferably 0.1-30%, more preferably 1 to 30%, most preferably 1.5 to 10% by weight of the total composition.
It is a highly preferred aspect of the invention that the composition comprises water. The composition may conveniently comprise at least 40% water, preferably at least 50% water. Preferably the composition comprises less than 85% water.
Advantageously the moisturising cream comprises a humectant. Humectants are well know in the art, and are cosmetic ingredients intended to increase the water content of the top layers of the skin. This group of ingredients includes primarily hygroscopic agents employed for this specific purpose. Humectants of particular interest for the present invention are polyols and alcohols such as sorbitol, glycerol, ethylene glycol, propylene glycol or mixtures thereof. Preferably, the humectant contains a hydroxyl group.
When the composition does contain water, it is highly preferred that the composition additionally comprises a surfactant and a hydrophobic phase. Additional preferred ingredients include emollients, and optionally volatile silicones. In particular in such compositions, it is preferred that the hydrophobic phase comprises as little as possible of materials which can dry the skin. In particular, the composition may be configured such that it contains a level of volatile silicone which is sufficiently low so as not to cause drying out of the skin.
Surprisingly, we have found that a moisturising cream can be incorporated into an antiperspirant or deodorant cosmetic composition to produce an antiperspirant or deodorant composition which has improved and attractive cosmetic characteristics expected of such compositions as well as excellent efficacy, low irritation potential and non-stinging upon application.
Therefore, the invention provides an antiperspirant or deodorant compositions which exhibit excellent wetness or odour control, but simultaneously contain a cream which moisturises the stratum corneum. This is contrary to what would be expected especially with antiperspirant compositions, where the aim is to prevent moisture loss from the skin.
Preferably, the moisturising cream in the compositions according to the invention can be a solid or a semi-solid emulsion, although the term can equally be applied to non-aqueous products such as wax-solvent based products and ointments. The term also includes dispersion products of cream consistency.
Preferably, the moisturising cream is present in the composition at a level of at least 15%, more preferably greater than 20%, more preferably greater than 25% by weight of the antiperspirant composition.
The moisturising cream component of the composition can be considered as the water, surfactant, hydrophobic phase, and humectant components of the composition, or indeed any components of the antiperspirant composition which are not the antiperspirant active, perfume, preservative, and optional ingredients (e.g. fillers, opacifiers) of the composition
The cream in the composition can be of the oil in water type, or water in oil. The cream in the composition should also be stable, and to this end techniques used in the art can be used to stabilize the cream. These include using high shear in preparation, raising the temperature through the phase inversion temperature and appropriately cooling, matching the HLB of the surfactant, and incorporating a lamellar phase.
Moisturising creams used
Boxer Matthew
Helene Curtis Inc.
Prats Francisco
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