US1645852A - Dentifrice - Google Patents

Description

Patented Oct. 18, 1927.

UNITED STATES BOY H. mwum, OFPITTSBUBGB, PENNSYLVANIA.

mmrmrcn.

Io Drawing. Original application fled August 27, 1824, Serial Io. 734,518. Divided and thin application fled October 18, 1828. Serial ll'o. 141,835.

This invention relates to a dentifrice, and the present application constitutes a division of application Serial No. 734,513, filed August 17, 1924.

The object of the invention is to rovide a dentifrice which has no injurious e ect upon the tissues or glands of the mouth, and which possesses certain particularly advantageous properties for cleansing the teeth and gums and for the general care of the oral cavity.

A problem encountered in compounding a satisfactory dentifrice is to provide a substance which thoroughly cleanses the teeth;

but which contains no gritty substance capable of wearing away the enamel of the teeth, and no ingredient capable of exerting a solvent action thereon. v

A corollary function of a complete dentifrice is to dissolve and completely remove oils, fats, and mucin from the teeth; thus preventing the formation of tartar and other deposits, and exposing the actual surface of the teeth to direct contact of the" cleansing instrument to secure a thorough cleansing thereof.

A still further desirable property of a dentifrice is to be capable of exerting a mild antiseptic action, thus retarding the increase of bacteria within the oral cavity without injuring any tissues of the mouth or gums.

The dentifrice of the present invention meets these requirements by the incorporation therein of a substance which acts as a solvent of fats, oils, and mucin; and which has a mild antiseptic effect, without injuring the teeth or tissues or impairing the flow or alkalinity of the saliva.

A substance having these desirable properties for use in a dentifrice is the halide of ethane, iodo-ethane, or ethyl iodide.

As used in a. dental cream, this active ingredientis combined with relatively inert substances which provide filling material.

The following formula, involving ethyl iodide, is one which has been found to give satisfactory results:

Calcium carbonate (prepared chalk) Grams.

5e CaCO 100 Magnesium carbonate (MgCO,,) Ethyl iodide C H I 15-40 White mineral oil (hi hly refined pe- It should be understood that the formula given above is illustrative only, and that the ingredients other than the ethyl iodide may be varied in order to provide a dental cream of any desired consistency and flavor. The amount of ethyl iodide may also be varied, and, as this substance is harmless, it may be included in as great an amount as will remain in a uniform mechanical mixture with'the other ingredients of the composition. There is also no definite lower limit to the amount of this substance which may be used, as any appreciable quantity will exert a beneficial effect. In order that the most advantageous results may be obtained, however, it is desirable that the amount of ethyl iodide in the composition should be from one-twentieth of the total weight of the composition to an amount as great as may be retained in satisfactory condition therein.

It should be noted that ethyl iodide is a halogen substitution product of ethane, which is one of the paraflin series of hydrocarbons in the aliphatic division thereof. Other iodides of ethane itself may be used instead of the ethyl iodide, and iodides of the other members of the series may also be substituted therefor.

Not only the monohalides of the paraffin series, but also the di-halides and polyhalides of the series may be employed when their physical properties render them suitable for use in a dentifrice.

Propargyl iodide, an iodide in the acetylene series, has suitable chemical and physical properties, but its rarity renders its use gommercially impracticable.

In regard to any of these substances, it may be stated as a general principle that the more desirable are those having a boilethyl iodide.

ing point between twenty-five degrees centigrade and one hundred and fifty degrees centigrade. To express the matter d1fierently, the more desirable are those which are liquids at room temperature and atmospheric pressure. The compounds havlng a boiling point lower than twenty-five degrees centigrade tend to evaporate from or separate in the composition, while those which are solid at room temperature and atmo heric pressure are too inactive impart t e desired qualities to the dent frice.

While the specific gravities of the diflerent iodides vary considerably, it may be stated generally of all of them that the best results are obtained b using an amount in excess of one-twentieth :by weight of the total composition.

A satisfactory procedure 1n making the dental cream consists in mixing the white mineral oil and the liquid iodide. They may then be added to the solid constituents of the dentrifice, such as calcium carbonate and magnesium carbonate, which absorbs them. The other constituents such as glycerme, soap solution, and water, to which t e flavoring matter. may have been previously added, are then added to the solid constituents, With the absorbed ingredients, to produce a dentifrice having a pasty consistency.

In addition to the dental cream, one or more halogen substitution products of hydrocarbons may be used in liquid form to secure an occasional thorough cleansing of the teeth. One such liquid may consist merely of a mixture of. tetrachlor methane and To such mixture, the white mineral oil may be added, if so desired, to retard evaporation of these volatile liquids. A satisfactory formula for such liquid may be given as follows:

. Grams. Tetrachlor methane 3 Ethyl iOdide 1 White mineral oil 4 While white mineral oilis. highly desirable because of its lack of taste and odor,

various other mineral, animal, or vegetable oils may be substituted for it. For example highly refined olive oil or cottonseed oil may be satisfactorily used as a carrier for the organic halide,

What I claim is:

1. A dentifrice comprising ethyl iodide as its principal active ingredient.

2. A dental cream comprising ethyl iodide,

total composition.

a filling material, and a white mineral oil. 3. A dentifrice comprising ethyl iodide in an amount no less than one-twentieth by weight of the total composition.

.4. A dental cream comprising ethyl iodide, a filling material, and a white mineral oil, the ethyl iodide being present in an amount no less than one-twentieth by weight of the total composition.

5. A dentifrice comprisin as its principal active ingredient an io ide of an aliphatic hydrocarbon.

6. A dental cream comprising as its principal active ingredient an iodide of an aliphatic hydrocarbon having its boilin poin" etween the limits of twenty-five egree centigrade and one hundred fift degrees centigrade, a filling material, and a white mineral oil.

7. A dentifrice comprisin as its principal active ingredient an io ide of an aliphatic hydrocarbon in an amount no less than one-twentieth by weight of the total composition.

8. A dental cream comprising as its principal active ingredient an iodide of an aliphatic hydrocarbon having its boiling point between the limits of twenty-five degrees centigrade, and one hundred fifty degrees centigrade filling material, and a white mineral oil, the iodide being resent in an amount no less than one-twentleth by weight of the total composition.

9. A dental'preparation comprising ethyl iodide as an active a ent, and an oleaginous carrier for the ethyl iodide.

10. A dental preparation comprising ethyl iodide as an active agent, and a white mineral oil as a carrier for the ethyl iodide.

11. A dental cream comprising as its principal active ingredient aniodide of an aliphatic hydrocarbon whichis liquid at ordinary atmospheric temperatures and pressulre, a filling material, and a white mineral oi 12. A dental cream comprising as its principal active ingredient an iodide of an aliphatic hydrocarbon which is liquid at ordi nary atmospheric temperatures and pressures, a filling material, and a white mineral oil, the iodide being present in an amount no less than one-twentieth by weight of the In witness whereof, I hereunto set my hand.

RO H. BBOWNLEE.