Breath refreshening lipstick

Details Breath refreshening lipstick Breath refreshening lipstick

2000-03-27

2001-09-18

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Live skin colorant containing

Lip

C424S400000, C424S401000, C424S404000, C424S076100

Reexamination Certificate

active

06290940

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 lavatory facility. Ordinarily use of these products is limited to times just subsequent to a meal. Protection may not linger for long periods between meals, especially where brushing or rinsing opportunities are unavailable.
EP 0 549 267 (Dunphy et al.) discloses a lip-treatment composition including a base oil, water and a structurant, and at least one active for the treatment of the lips, gums, teeth, oral mucosa and the throat. Listed among a variety of actives are zinc salts, triclosan and other antimicrobial agents. These are said to be effective against breath malodour. Unfortunately the systems disclosed by this publication sometimes lack immediate delivery of a benefit. When the benefit does begin, it may be insufficient to be fully effective.
Accordingly, it is an object of the present invention to provide products for freshening breath and reducing oral malodor which are effective immediately and thereafter for relatively long time periods.
Another object of the present invention to provide products for freshening breath and reducing malodor which are easy to apply and require no lavatory 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 10% by weight of an antibacterial agent; and
(iii) from about 0.01 to about 2% of menthol.
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 running water for their application. They also release a constant stream of oral malodor reductant for extended periods of time. Antibacterial agents in combination with menthol serve as the actives. During periods just subsequent to application of the lipstick, the cyclomethicone is quickly released to mask any malodour. As the immediate effect of menthol declines, the antibacterial agent which release more slowly from the lipstick begins to migrate to the oral cavity.
Accordingly, compositions of this invention will include an antibacterial agent present in amounts from about 0.01 to about 10%, preferably from about 0.1 to about 5%, optimally from about 0.5 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 triclosan).
Most preferred as the antibacterial agent are zinc salts. Examples of zinc salts that may be employed are those having organic and inorganic anions selected from the group consisting of acetate, benzoate, borate, bromide, carbonate, citrate, chloride, glycerophosphate, hexafluorosilicate, di-lactate (trihydrate), nitrate, phenolsulfonate, glycinate, silicate, alkanoates having 8 to 18 carbon atoms, such as zinc stearate, salicylate, stannate, sulfate, tannate, titanate, tetrafluoroborate, tartrate and mixtures thereof. The zinc salts may be used singly or in admixture.
By the term “zinc salt” is meant any zinc compound capable of dissociating into zinc ions at a temperature of about 37° C., as well as to zinc ions formed in aqueous medium such as a mouthwash or oral salivary secretions. Most preferred for purposes of the present invention is zinc citrate such as hydrated zinc citrate. Zinc compounds such as zinc oxide are outside the scope of the zinc salt class.
Compositions of this invention are also formulated with menthol. Amounts of 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.
Menthol may be delivered directly or released from a bound menthol substance. 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 methy-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 adipic, caprylic, capric, lauric, myristic, palmitic, stearic 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

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