Breath freshening lipstick

Details Breath freshening lipstick Breath freshening lipstick

1999-11-10

2002-05-07

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Live skin colorant containing

Lip

C424S401000

Reexamination Certificate

active

06383475

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns a lipstick for freshening breath and controlling oral malodor.
2. The Related Art
Foods and natural decay generate odors within the oral cavity. These are apt to remain on the breath long after meals. Particular offenders in the food category are liquors, garlic, fish and leeks. Smoking also generates smells. Foul breath sometimes arouses unpleasant responses in those near the generating source. Malodor is also an indication of oral and other body organ illnesses.
Traditionally bad breath has been inhibited through use of toothpaste and oral rinses. Application of these products ordinarily requires a wash facility. Use of these products is practiced most often only just subsequent to a meal. Protection may not linger for long periods between meals, especially where brushing or rinsing opportunities are unavailable.
Accordingly, it is an object of the present invention to provide products for freshening breath and reducing oral malodor which are effective for relatively long periods of time.
Another object of the present invention is to provide products for freshening breath and reducing oral malodor which are easy to apply and require no wash facilities for their application.
These and other objects of the present invention will become more readily apparent from consideration of the following summary and detailed discussion.
SUMMARY OF THE INVENTION
A lipstick is provided for freshening breath and controlling oral malodor, the lipstick including:
(i) from about 10 to about 99% of lipophilic material;
(ii) from about 0.01 to about 2% of free menthol; and
(iii) from about 0.1 to about 10% of a bound menthol substance.
DETAILED DESCRIPTION OF THE INVENTION
Now it has been found that breath freshening and the reduction of oral malodor is achievable through a specially formulated lipstick. Unlike toothpaste and mouth rinses, the specially formulated lipsticks of the present invention require no basin or running water for their application. They also release a constant stream of oral malodor reductant for extended periods of time. Free menthol combined with a bound menthol substance serve as the actives. During periods just subsequent to application of the lipstick, the free menthol is released to the oral cavity. As free menthol concentration within the lipstick decreases, the bound menthol substance begins to release its menthol component therefore extending the activity period.
By the term “free menthol” is meant menthol uncomplexed, unbound and non-encapsulated (other than being within the general lipophilic material matrix). Amounts of free menthol may range from about 0.01 to about 2%, preferably from about 0.05 to about 1%, optimally from about 0.1 to about 0.5% by weight.
By the term “bound menthol substance” is meant a physical combination of free menthol releasably complexed or encapsulated by a binding or enrobing substance. Materials suitable as encapsulate include polysaccharides such as starch or modified starch; synthetic polymers and copolymers such as polyvinyl alcohol, acrylics or polyurethanes; vegetable gums such as gelatin, guar or carrageenan gums, and combinations thereof.
Complexes of menthol may be formed with starches such as cyclodextrin, clathrates, clays and zeolites. Most preferred are complexes of menthol with cyclodextrin. By the term “cyclodextrin” is meant any of the known natural cyclodextrins as well as substituted and unsubstituted analogs and any of their derivatives. Examples of derivatives include methyl-beta-cyclodextrin, hydroxyethyl-beta-cyclodextrin and hydroxypropyl-beta-cyclodextrin. Generically these substances are cyclic oligosaccharides with capability of forming inclusion complexes with a variety of materials. They vary in ring size from 6 to 12 glucose units. The most common are the 6, 7 or 8 glucose built rings commonly referred to as alpha-cyclodextrin, beta-cyclodextrin and gamma-cyclodextrin, respectively. These substances are available from the Lipo Chemical Company, a subsidiary of Cerestar Inc. (formally the American Maize Company). A complex of menthol with beta-cyclodextrin is the most preferred embodiment.
Amounts of the bound menthol substance may range from about 0.1 to about 10%, preferably from about 0.2 to about 2%, optimally from about 0.5 to about 1% by weight based on releasable menthol by weight of the lipstick composition.
An adjunct freshening component to menthol is that of anethole present in respective weight ratio of about 100:1 to about 1:1, preferably from about 50:1 to about 2:1, optimally from about 30:1 to about 10:1.
An essential element of all lipsticks is that of lipophilic material. These materials may be solids (defined as being firm and of a plastic texture at room temperature) and liquids, although the combination thereof should provide structure to the lipstick rendering same as a solid with plastic texture at room temperature.
Liquids suitable as components of the lipophilic materials may be those selected from the group consisting of hydrocarbon oils, fatty acid esters, fatty alcohols and mixtures thereof. Hydrocarbon oils may be either natural or synthetically produced. Those from mineral sources include petroleum derived mineral oils, petrolatum and mixtures thereof. Plant sourced oils include saturated and unsaturated fatty acids examples of which are adipic, caprylic, capric, lauric, myristic, palmitic, stearic acids and mixtures thereof. Unsaturated fatty acids include linoleic, linolenic, ricinoleic, oleic, elaidic, erucic acids and mixtures thereof. Other vegetable oils include castor bean oil, rapeseed oil, soybean oil, palm kernel oil, babassu kernel oil, coconut oil and mixtures thereof. Fatty alcohols suitable for this invention include cetearyl alcohol, cetyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, lanolin alcohol, lauryl alcohol, oleyl alcohol and mixtures thereof. Fatty acid esters suitable for this invention may be derived from the esterification reaction of C
8
-C
20
fatty acids reacted with C
1
-C
20
monohydric and polyhydric alcohols (the latter being triglycerides). Illustrative but not limiting examples include cetyl ricinoleate, glycerol oleate, glycerol monostearate, isopropyl lanolate, isopropyl linoleate, isopropyl myristate, ethyl palmitate, isopropyl palmitate, isopropyl isostearate and mixtures thereof.
Solid lipophilic materials are generally those having melting points from about 55° C. to about 110° C. The solids may include fatty alcohols, fatty acid esters, waxes and mixtures thereof. Substances mentioned under the liquids category having the suitable aforementioned melting point range should be considered as solid lipophilic materials. Waxes are a particularly useful type of solid within the context of the present invention. Preferred waxes include those selected from the group consisting of candelilla, beeswax, carnauba, spermaceti, montan, ozokerite, ceresin, paraffin, modified beeswax, bayberry wax, castor wax, microcrystalline waxes and mixtures thereof.
Amounts of the lipophilic material may range from about 10 to about 99%, preferably from about 30 to about 90%, optimally from about 40 to about 80% by weight of the composition.
Advantageously, compositions of this invention will include an antibacterial agent present in amounts from about 0.05 to about 10%, preferably from about 0.2 to about 5%, optimally from about 0.8 to about 3% by weight. Suitable as antibacterial agents are zinc salts, quaternary ammonium compounds and chlorinated hydrocarbons. Illustrative of the quaternary ammonium compounds are pyridinium salts (such as cetyl pyridinium chloride) and benzalkonium salts (such as dimethyl benzylammonium chloride) and chlorhexidines. Illustrative of the chlorinated hydrocarbons are salicylanides (such as 4′, 5-dibromosalicylanlide) and halogenated diphenyl ethers such as 2,4,4′-trichloro-2′-hydroxydiphenyl ether (commonly known as trichlosan).
Most preferred as the antibacterial agent are zinc salts. Examples of zinc salts that ma

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