MX2008006887A - Dentifrice composition free of abrasive material - Google Patents

Abstract

A dentifrice composition comprising, (a) a hydrophilic clay material, (b) a phytic acid compound, (c) an effective amount of an oral care active, and (d) a polar solvent carrier;wherein the composition is substantially free of abrasive material.

Description

DENTÍFRICA COMPOSITION FREE OF ABRASIVE MATERIAL FIELD OF THE INVENTION The present invention relates to a dentifrice composition practically free of abrasive material, and which can still maintain the cleaning benefits of a regular toothpaste.

BACKGROUND OF THE INVENTION Toothpaste compositions such as toothpastes are routinely used by consumers as part of their oral care hygiene regimes. It is well known that oral care products can offer therapeutic and cosmetic hygiene benefits to consumers. Therapeutic benefits include, but are not limited to, caries prevention, gingivitis prevention, and hypersensitivity control. Cosmetic benefits include, but are not limited to, dental plaque control and tartar formation, removal and prevention of dental stains, tooth whitening, breath freshening, and aesthetic mouth feel characteristics such as sensation of freshness or slippery sensory touch. The use of abrasive material, such as silica, has been considered critical for a long time to provide the aforementioned therapeutic and cosmetic benefits. Abrasive materials provide abrasion between the toothbrush and the teeth to clean the plaque, spots, and tartar, while also building rheology and structure of the toothpaste to maintain the thermal stability of the total formulation. At the same time, however, the use of abrasive materials can also have certain negative effects on the total formulation. For example, the cost of silica itself is expensive. In addition, the silica adsorbs components in a typical dentifrice composition such as active agents, flavors, and foaming agents, and thus the concentrations of these components must be adjusted in accordance with the predicted loss by the silica. Still further, certain active agents, such as cetylpyridinium chloride, have poor compatibility with silica, and therefore can not be included in a dentifrice composition, despite their known efficacy. In another aspect, the general consumer has the idea that abrasive materials can erode the enamel, if the teeth are brushed very intensively. Based on the foregoing, there is a need for an abrasive-free dentifrice composition, which can still provide the benefits of a regular dentifrice composition. Specifically, there is a need for an abrasive-free dentifrice composition that is thermally stable, and that can provide the same cleaning benefits as abrasive compositions on the market.

BRIEF DESCRIPTION OF THE INVENTION The present invention is directed to a dentifrice composition comprising: (a) a hydrophilic clay material; (b) a phytic acid compound; (c) an effective amount of an oral care asset; and (d) a polar solvent carrier; wherein the composition is practically free of abrasive material. The present invention is further directed to a method for cleaning teeth without an abrasive. These and other features, aspects, and advantages of the present invention will become apparent to those experienced in the industry, from reading the present disclosure with the accompanying claims.

DETAILED DESCRIPTION OF THE INVENTION The following is a list of definitions for the terms used herein. "Understand" means that you can add other steps and other ingredients that do not affect the final result. This term includes the expressions "consists of" and "consists essentially of". Unless specifically expressed in any other way, all percentages are by weight of the total composition. All references cited are incorporated herein in their entirety as a reference. The citation of any reference does not imply admitting the possibility of being considered as an industry precedent to the invention claimed. All proportions are proportions by weight, unless specifically indicated otherwise. The present invention is described in detail below, in its aspects of product and process. a) Hydrophilic clay material The composition of the present invention comprises a hydrophilic clay material which swells or thickens in the presence of a polar solvent, and acts as a binder for the dentifrice composition. The hydrophilic clay material may be any known material that is safe and aesthetically acceptable for use in oral care. The hydrophilic clay material provides a suitable rheology for the present dentifrice composition of various product forms, including liquids, gels, and toothpastes for brushing, which have a viscosity of about 1 mPa.s to about 450,000 Pa.s, as measured with a Brookfield viscometer with a TE spindle. In a highly preferred embodiment, the present dentifrice composition is a gel or toothpaste with suitable body and viscosity, the viscosity being from about 10,000 Pa.s to about 450,000 Pa.s, preferably from about 10,000 Pa.s to about 250,000 Pa.s. Additional binders may be added to provide adequate rheology, as discussed below. Surprisingly, it has been discovered that the hydrophilic clay material provides the aforementioned suitable stability at relatively low levels, and at a relatively low cost, without the existence of an abrasive material in the composition. The hydrophilic clay material is preferably included, by weight of the total composition, from about 0.01% to about 10%, preferably from about 1% to about 5%. Hydrophilic clay materials useful herein include natural and synthesized stratified silicate minerals, pyrogenic silicas, precipitated thickening silica, and mixtures thereof. Stratified silicate minerals may be of natural origin, or synthesized to have magnesium substituted by certain portions of the mineral. Pyrogenic silicas are those that provide very little or no abrasive function and they have a particle size of less than about 5 μm, typically from about 1 nm to about 1 μm. Precipitated thickening silicas are those that have a degree of aggregation (DOA) of at least about 150 mL / 100 g, preferably at least about 250 mU100 g, and have a particle size of about 1 μm to approximately 50 μm. The precipitated thickening silica can be distinguished from the abrasive silica material, due to its high oil absorption capacity, as defined by the differential optical absorption value (DOA). This capacity provides the property of thickening. Hydrophilic clay materials useful herein and commercially available include the layered magnesium silicate with the trade name LAPONITE series available from Rockwood Additives Limited & Southern Clay Company, pyrogenic silica with an average particle size of about 12 nm under the trade name AEROSOL series and CAB-O-SIL available from Cabot & Degussa Corporation, the amorphous silica precipitated under the tradename ZEODENT 165 from J. M. Huber Company and SYLOX 15 from Grace Davision, and the silica precipitated under the tradename TIXOSIL from Rhodia. b) Phytic Acid Compound The composition of the present invention comprises a phytic acid compound in an amount that provides effective cleaning of the teeth. Phytic acid, also known as myo-inositol Hexaphosphate, or inositolhexaphosphoric acid, is a natural biodegradable chelating agent of vegetable base in liquid form with chelating performance comparable to ethylenediaminetetraacetic acid (EDTA). The origin of the plants from which the phytic acid compounds can be found, include cereal grains, legumes, nut oilseeds, pollen, spores, and organic soils. The phytic acid compound herein may be the phytic acid itself or its orally acceptable salts including, but not limited to, the alkali metal salts and alkaline earth metal salts. Useful phytic acid salts include sodium phytate, potassium phytate, magnesium phytate, calcium phytate, stannous phytate, zinc phytate, copper phytate, ferric phytate, and mixtures thereof. Surprisingly, it has been found that the phytic acid compound provides a good cleaning effect in the present abrasive-free composition without stains that can be perceived by the consumer, and is compatible with the present polar solvent carrier, as well as a wide variety of ingredients oral care assets. Without being limited by theory, it is believed that the phytic acid compound provides an exclusive good cleaning due to its liquid form, when flowing between the teeth. It is believed that this flow provides cleaning differently from solid abrasive materials. In addition, it is believed that the phytic acid compound provides a positive effect to protect tooth enamel from dissolution by acid, and anti-jar effect. Commercially available phytic acid compounds useful herein include phytic acid solution, sodium phytate, phytate magnesium, calcium phytate, and stannous phytate available from Sichuan Chengdu Yason, Shikishima Starch Manufacturing Company, and Nibbio. c) Oral Care Active The composition of the present invention comprises an oral care active that provides the intended therapeutic oral care benefit. Oral care assets useful herein include anticalculus agents, stannous ion sources, fluoride ion sources, bleaching agents, antimicrobial agents, antiplaque agents, anti-inflammatory agents, nutrients, antioxidants, antiviral agents, analgesics and anesthetics, stratified material containing zinc, and mixtures of these. c-1) Anticalculus Agent Oral care agents useful herein include an anticalculus agent, which in one embodiment may be present from about 0.05% to about 50%, by weight of the composition for oral care, in another embodiment is from about 0.05% to about 25%. The anticalculus agent can be selected from the group consisting of polyphosphates (including pyrophosphates) and the salts thereof; polyaminopropanesulfonic acid (AMPS) and salts thereof; polyolefin sulfonates and the salts thereof; polyvinyl phosphates and the salts thereof; polyolefin phosphates and the salts thereof; diphosphonates and the salts thereof; phosphonoalkanecarboxylic acid and the salts thereof; polyphosphonates and the salts thereof; polyvinyl phosphonates and salts thereof; polyolefin phosphonates and salts thereof; polypeptides; and mixtures of these. In one embodiment, the salts are salts of alkali metals. Polyphosphates are generally used as the fully or partially neutralized salts of water-soluble alkali metals such as the potassium, sodium, ammonium salts, and mixtures thereof. Inorganic polyphosphate salts include tripolyphosphate, tetrapolyphosphate of alkali metals (eg, sodium), potassium hydrogen phosphate, sodium hydrogen phosphate, dialkali metal diacid (eg, disodium), monoacid of trialkaline metals (p. eg, trisodium), alkali metal hexametaphosphate (eg, sodium), and mixtures thereof. Polyphosphates greater than tetrapolyphosphate usually occur as amorphous vitreous materials. In one embodiment, the polyphosphates are those manufactured by FMC Corporation, commercially known as Sodafos (n = 6), Hexaphos (n = 13) and Glass H (n = 21, sodium hexametaphosphate), and mixtures thereof. Pyrophosphate salts useful in the present invention include alkali metal pyrophosphates, mono, di, and tripotassium sodium pyrophosphates, double alkali metal pyrophosphates, tetrametal alkaline pyrophosphate salts, and mixtures thereof. In one embodiment, the pyrophosphate salt is selected from the group comprising trisodium pyrophosphate, diacid disodium pyrophosphate (Na2H2P2O7), dipotassium pyrophosphate, tetrasodium pyrophosphate (Na4P2?), Tetrapotassium pyrophosphate (K P2? 7), and mixtures thereof. Polyolefin sulfonates include those in which the olefin group contains 2 or more carbon atoms, and salts thereof. Polyolefin phosphonates include those wherein the olefin group contains 2 or more carbon atoms. The polyvinylphosphonates include polyvinylphosphonic acid. Diphosphonates and their salts include azocycloalkan-2,2-diphosphonic acids and their salts, acid ions azocycloalkan-2,2-diphosphonates and their salts, azacyclohexane-2,2-diphosphonic acid, azacyclopentane-2,2-diphosphonic acid, N-methyl-azacyclopentane-2,3-diphosphonic acid, EHDP (ethane-1-hydroxy acid) -1, 1, -diphosphonic acid), AHP (azacycloheptan-2,2-diphosphonic acid), ethan-1-amino-1,1-diphosphonate, dichloromethane diphosphonate, etc. The phosphonoalkanecarboxylic acid or its alkali metal salts include PPTA (phosphonopropanetricarboxylic acid), PBTA (phosphonobutane-1, 2,4-tricarboxylic acid), each as acid or alkali metal salts. Polyolefin phosphates include those wherein the olefin group contains 2 or more carbon atoms. Other useful materials include synthetic anionic polymers, including polyacrylates and copolymers of anhydride or maleic acid and methyl vinyl ether (eg, Gantrez), as described, for example, in U.S. Pat. no. 4,627,977, as well as, for example, polyaminopropanesulfonic acid (AMPS), zinc citrate trihydrate, polyphosphates (e.g., tripolyphosphate); hexametaphosphate), diphosphonates (e.g., EHDP; AHP), polypeptides (such as polyaspartic and polyglutamic acids), and mixtures thereof. In addition, the oral care composition may include a polymeric carrier, such as those described in U.S. Pat. num. 6,682,722 and 6,589,512 and in U.S. patent applications. num. 10 / 424,640 and 10 / 430,617. c-2) Source of stannous ion The oral care agents useful herein include a source of stannous ion. The stannous ions can be generated from stannous fluoride and other stannous salts. It has been found that stannous fluoride contributes to decrease gingivitis, plaque, sensitivity and improvement the benefits in oral breath. The stannous ions included in a buccal composition will provide efficacy to the subject who uses the composition. Although efficacy could include benefits other than decreased gingivitis, efficacy is defined as a marked degree of decrease in the site of plaque metabolism. Formulations that provide this efficacy generally include stannous levels generated by stannous fluoride or other stannous salts ranging from about 3000 to about 15,000 ppm of stannous ions in the total composition. At stannous levels below about 3000 ppm, the efficiency of the stannous is insufficient. The stannous ion is present in an amount of about 4000 ppm to about 12,000 ppm, in one embodiment, from about 5000 ppm to about 10,000 ppm. Other stannous salts include organic stannous carboxylates, such as stannous acetate, stannous gluconate, stannous oxalate, stannous malonate, stannous citrate, stannous ethylene glycolate, stannous format, stannous sulfate, stannous lactate, stannous tartrate, and the like. Other sources of stannous ion include stannous halides such as stannous chloride, stannous bromide, stannous iodide, and stannous chloride dihydride. In one embodiment, the source of stannous ion is stannous fluoride and in another stannous chloride dihydrate. The combined stannous salts may be present in an amount from about 0.001% to about 11%, by weight of the compositions. In one embodiment, the stannous salts may be present in a concentration of approximately 0.01% at about 7%, in another embodiment, that concentration may be from about 0.1% to about 5% and in another embodiment from about 1.5% to about 3%, by weight of the composition. c-3) Fluoride ion source Oral care agents useful herein include a fluoride ion source to provide an anticarie effect. These materials include the inorganic fluoride salts, such as the soluble salts of alkali metal fluoride, for example, sodium fluoride, potassium fluoride, sodium monofluorophosphate and sodium hexafluorosilicate. Alkali metal fluorides are preferred, such as sodium fluoride, sodium monofluorophosphate, sodium hexafluorosilicate and mixtures thereof. The amount of fluorine-providing salt is generally present in the oral composition in a concentration of about 0.0 to about 3.0% by weight. Any suitable minimum amount of this salt can be used, but it is preferred to employ enough fluoride salt to release from about 50 ppm to about 3500 ppm, preferably from about 300 ppm to 2,000 ppm, of fluoride ion. c-4) Bleaching agent Oral care agents useful herein include a bleaching agent. Suitable actives for the bleach are selected from the group consisting of alkali metal and alkaline earth metal peroxides, metal chlorites, perborates including mono and tetrahydrates, perfosphates, percarbonates, peroxyacids, alkali metal and persulfates, such as as ammonium, potassium, sodium and lithium persulfates, and combinations of these. Suitable peroxide compounds include hydrogen peroxide, urea peroxide, calcium peroxide, carbamide peroxide, magnesium peroxide, zinc peroxide, strontium peroxide and mixtures thereof. In one embodiment the peroxide compound is carbamide peroxide. Suitable metal chlorites include calcium chlorite, barium chlorite, magnesium chlorite, lithium chlorite, sodium chlorite, and potassium chlorites. The additional bleaching assets can be hypochlorite and chlorine dioxide. In one embodiment, chlorite is sodium chlorite. In another embodiment, the percarbonate is sodium percarbonate. In one embodiment, the persulphates are oxones. The proportion of these substances depends respectively on the available oxygen or chlorine that the molecule can provide to whiten the stain. In a modality, bleaching agents may be present in a concentration of from about 0.01% to about 40%, in another embodiment, from about 0.1% to about 20%, in another embodiment, from about 0.5% to about 10% and in another embodiment, about 4% to about 7%, by weight of the composition. c-5) Antimicrobial agent Oral care agents useful herein include other antimicrobial agents. These agents may include, but are not limited to: 5-chloro-2- (2,4-dichlorophenoxy) -phenol, commonly referred to as triclosan; 8-hydroxyquinoline and its salts; copper compounds II, even, but without limited to copper chloride (II), copper sulfate (II), copper acetate (II), copper fluoride (II) and copper hydroxide (II); italic acid and its salts including, but not limited to, those described in U.S. Pat. no. 4,994,262, including monopotassium magnesium phthalate; chlorhexidine; alexidine; hexetidine; sanguinarine; benzalkonium chloride; salicylanilide; domiphen bromide; cetylpyridinium chloride (CPC); tetradecylpyridinium chloride (TPC); N-tetradecyl-4-ethylpyridinium chloride (TDEPC); octenidine; iodo; sulfonamides; Bisbiguanides; phenolic; delmopinol, octapinol and other piperidino derivatives; niacin preparations; zinc or stannous ion agents such as zinc oxide, zinc lactate and zinc citrate; nystatin; grapefruit extract; apple extract; thyme oil; thymol; antibiotics such as augmentin, amoxicillin, tetracycline, doxycycline, minocycline, metronidazole, neomycin, kanamycin, cetylpyridinium chloride, and clindamycin; the analogs and salts of the above; essential oils including thymol, geraniol, carvacrol, citral, hinokitiol, eucalyptol, catechol (particularly 4-allylcatechol) and mixtures thereof; methyl salicylate; hydrogen peroxide; metal salts of chlorite; and the mixtures of all the previous ones. The antimicrobial components can be present from about 0.001% to about 20% by weight of the composition. c-6) Antiplaque agent Oral care agents useful herein include another antiplaque agent such as dimethyl isosorbide, copper salts, strontium salts, magnesium salts or a dimethicone copolyol. The copolyol of Dimethicone is selected from C12 to C20 alkyldimethicone copolyols and mixtures thereof. In one embodiment, the dimethicone copolyol is copolyol of cetyl dimethicone marketed under the name of Abil EM90. In one embodiment, the dimethicone copolyol may be present in a concentration of from about 0.001% to about 25%, in another embodiment that concentration is from about 0.01% to about 5%, and in another embodiment, from about 0.1% to about 1.5 % by weight of the composition. c-7) Anti-inflammatory agent Oral care agents useful herein include anti-inflammatory agents. These agents may include, but are not limited to, non-steroidal anti-inflammatory agents oxicam, salicylates, propionic acids, acetic acids and fenamates. Non-steroidal anti-inflammatory agents oxicam (NSAIDs) include, but are not limited to, ketorolac, flurbiprofen, ibuprofen, naproxen, indomethacin, diclofenac, etodolac, indomethacin, sulindac, tolmetin, ketoprofen, fenoprofen, piroxicam, nabumetone , aspirin, diflunisal, meclofenamate, mefenamic acid, oxifenbutazone, phenylbutazone and acetaminophen. The use of NSAIDs such as ketorolac is claimed in U.S. Pat. no. 5,626,838. Methods for preventing or treating primary and recurrent squamous cell carcinoma of the oral cavity or oropharynx by topical administration in the oral cavity or oropharynx of an effective amount of an NSAID. Suitable steroidal anti-inflammatory agents include corticosteroids, such as fluccinolone and hydrocortisone. c-8) Nutrients Oral care agents useful herein include nutrients that improve the condition of the oral cavity. Nutrients include minerals, vitamins, oral nutritional supplements, enteric nutritional supplements and mixtures of these. Useful minerals include calcium, phosphorus, zinc, manganese, potassium and mixtures of these. Vitamins can be included with minerals or they can be used independently. Suitable vitamins include vitamins C and D, thiamine, riboflavin, calcium pantothenate, niacin, folic acid, nicotinamide, pyridoxine, cyanocobalamin, para-aminobenzoic acid, bioflavonoids, and mixtures of these. Other nutritional supplements include amino acids, lipotropics, fish oil and mixtures thereof. The amino acids include, but are not limited to, L-tryptophan, L-lysine, methionine, threonine, levocamitine or L-carnitine and mixtures thereof. Lipotropic agents include, but are not limited to, choline, inositol, betaine, linoleic acid, linolenic acid, and mixtures thereof. Fish oil contains large amounts of polyunsaturated fatty acids Omega-3 (N-3), eicosapentaenoic acid and docosahexaenoic acid. Enteric nutritional supplements include, but are not limited to, protein products, glucose polymers, corn oil, safflower oil, medium chain triglycerides. Minerals, vitamins, oral nutritional supplements and enteric nutritional supplements are described in more detail in Dmg Facts and Comparisons (brochures of the drug information service), Wolters Kluer Company, St. Louis, Mo., © 1997, pgs. 3-17 and 54-57. c-9) Antioxidants Oral care agents useful herein include antioxidants. Antioxidants are described in texts such as Cadenas and Packer, The Handbook of Antioxidants, © 1996 by Marcel Dekker, Inc. Antioxidants useful in the present invention include, but are not limited to, vitamin E, ascorbic acid, uric acid, carotenoids, vitamin A, flavonoids and polyphenols, herbal antioxidants, melatonin, aminoindoles, lipoic acids and mixtures of these. c-10) Antiviral Agents Oral care agents useful herein include antiviral actives used to treat viral infections. These viral active agents include, but are not limited to: phosphonoformic acid; ciosin derivatives; purine analogues, such as adenosine, guanosine and inosine analogues; pyrimidine bases, such as cytidine and thymidine; amantadines; rimantadine hydrochloride; ribavirin; zanamivir; oseltamivir phosphate; trifluridine; heterocyclic dyes; acyclovir; famciclovir; valaciclovir, cidofovir; ganciclovir; levimisol; idoxuridine; lipophilic ß-ketones; and thiosemicarbazones. These antiviral assets are described in Drug Facts and Comparisons (brochures of the drug information service), Wolters Kluwer Company, St. Louis, Mo., © 2001, pgs. 1400-1423 (b), and in Kirk-Othmer, Encyclopedia of Chemical Technology (Encyclopedia of Chemical Technology), Fourth Edition, Volume 3, Wiley-Interscience Publishers (1992), p. 576-607. c-11) Analgesic and anesthetic agents Oral care agents useful herein include pain relieving agents or desensitizers. Analgesics are agents that relieve pain through its action at the central level, which increases the threshold of pain without altering consciousness or other sensory abilities. These agents may include, but are not limited to: strontium chloride; potassium nitrate; sodium fluoride; sodium nitrate; acetanilide; phenacetin; acertofan; tiorfan; Spiradoline; aspirin codeine; Thebaine; levorphenol; hydromorphone; oxymorphone; phenazocine; fentanyl; buprenorphine; butafanol; nalbuphine; pentazocine; natural herbs such as galsal nut; rough cubebine; Galanga skullcap; Liangmianzhen; and Baizhi. Topical anesthetic or analgesic agents, such as acetaminophen, sodium salicylate, trolamine salicylate, lidocaine and benzocaine, may also be present. These analgesic active agents are described in detail in the publication Kirk-Othmer, Encyclopedia of Chemical Technology, fourth edition, volume 2, Wiley-Interscience Publishers (1992), p. 729-737. c-12) Stratified Material Containing Zinc A useful oral care active herein is the stratified material containing zinc, which has an effective antimicrobial and antigingivitis benefit due to the high lability of zinc. Those zinc-containing stratified materials particularly useful herein are those that they have a relative zinc solubility greater than about 25%, have an average particle size of less than about 20 microns, and have a high surface area. In a preferred embodiment, the zinc-containing stratified material herein is incorporated into compositions containing an anionic surfactant, as discussed below. The lability of zinc is a measure of the chemical availability of the zinc ion. Soluble zinc salts that do not form complexes with other species in solution, have a relative lability of zinc, by definition, of 100%. The use of partially soluble forms of zinc salts or incorporation into a matrix with potential complexing agents usually reduces the lability of zinc practically below of the maximum 100% defined. Labile zinc is maintained by choosing a stratified material containing effective zinc or forming a stratified material containing effective zinc at the site by known methods. Zinc lability is evaluated by combining a diluted solution or dispersion containing zinc with the metallochromic xyleneol orange dye (XO) and measuring the degree of color change under specified conditions. The magnitude of color formation is proportional to the level of labile zinc. The developed procedure has been optimized for aqueous surfactant formulations but can also be adapted to other forms of physical products. A spectrophotometer is used to quantify the color change 572 nm, the wavelength for the optimal color change for XO. The spectrophotometer is adjusted to zero absorbance at 572 nm using a test control product except that it excludes the potentially labile form of zinc. The control and test products are then treated identically as follows. A 50 μL sample is dispensed into a bottle and 95 mL of distilled and deaerated water is added and stirred. Pipette into the sample vial 5 mL of a 23 mg / mL xyleneol orange stock solution at pH 5.0; this is considered time 0. Then the pH is adjusted to 5. 50 ± 0.01 using diluted HCl or NaOH. After 10.0 minutes, a portion of the sample is filtered (0I45 μ) and the absorbance at 572 nm is measured. The measured absorbance is then compared to a control measured separately to determine the relative lability of zinc (zero to 100%). The 100% lability control is prepared in a matrix similar to the test products but using a soluble zinc material (such as zinc sulfate) incorporated at an equivalent level based on zinc. The absorbance of the 100% lability control is measured equally as measured for the test materials. The relative lability of zinc is preferably greater than about 15%, more preferably greater than about 20%, and even more preferably greater than about 25%. Using this methodology, the following examples demonstrate a material (basic zinc carbonate) having intrinsically high lability in an anionic surfactant system compared to one (znO) with intrinsically low lability.

The stratified structures that contain zinc are those that have a crystalline growth that occurs mainly in two dimensions. It is described in conventional terms that layered structures are not only those in which all atoms are incorporated in well-defined layers, but also those that have ions or molecules between the layers, called gallery ions (AF Wells "Structural Inorganic Chemistry" Clarendon Press, 1975). Zinc-containing stratified materials (ZLM) may have the zinc incorporated in the layers or be components of the gallery ions. Many ZLMs are found in nature as minerals.

Common examples include hydrochlorite (zinc hydroxycarbonate), basic zinc carbonate, auricalcite (copper and zinc hydroxycarbonate), rosesite (copper and zinc hydroxycarbonate) and many related zinc-containing minerals. Natural ZLMs can also be found where species occur. of anionic layers such as clay-type minerals (eg, phyllosilicates) contain ion ions from exchanged ions. These natural materials can also be obtained synthetically or formed in place in a composition or during a production process. Another common class of ZLM, which are often, but not always, synthetic, are double layer hydroxides, which are usually represented by the formula [M2 + 1-xM3 + x (OH) 2] x + Am-x / m nH2O and some or all of the divalent ions (M2 +) would be represented as zinc ions (Crepaldi, EL, Pava, PC, Tronto, J, Valim, JB J. Colloid Interfac, Sci. 2002, 248, 429 ^ 2). Another class of MLZ, called double hydroxyl salts, can be prepared (Morioka, H., Tagaya, H., Karasu, M, Kadokawa, J, Chiba, K Inorg, Chem. 1999, 38, 4211-6). The double hydroxyl salts can be represented by the general formula [M2 + 1-xM2 + 1 + x (OH) 3 (1-y)] + An- (1 = 3y) / n nH2O where the two metal ions may be different; if they are equal and are represented by zinc, the formula is simplified to [Zn1 + x (OH) 2] 2x + 2x A- nH2O. This last formula represents (where x = 0.4) common materials such as zinc hydroxychloride and zinc hydroxynitrate. These are also related to hydrocintite, where a divalent anion replaces the monovalent anion. These materials can also be formed in place in a composition or in or during a production process. These ZLM classes represent relatively common examples of the general category and are not intended to be limiting in terms of the broader scope of the materials in accordance with this definition. Commercially available sources of basic zinc carbonate include basic zinc carbonate (Cater Chemicals: Bensenville, IL, USA), zinc carbonate (Shepherd Chemicals: Norwood, OH, USA), zinc carbonate (CPS Union Corp .: New York, NY, USA), zinc carbonate ( Elementis Pigments: Durham, UK), and AC zinc carbonate (Bruggemann Chemical: Newtown Square, PA, USA).

Basic zinc carbonate, which may also be commercially referred to as "zinc carbonate" or "basic zinc carbonate" or "zinc hydroxycarbonate", is a synthetic version comprising materials similar to hydrocintite. The idealized stoichiometry is represented by Zn5 (OH) 6 (CO3) 2, but the actual stoichiometric ratios may vary slightly, and other impurities may be incorporated in the crystal lattice. d) Polar solvent carrier The composition of the present invention comprises a polar solvent carrier to supply the essential components, and to provide an adequate rheology with the hydrophilic clay material. The polar solvent also serves as a solvent for incorporating oral care actives and other water soluble components. The polar solvent is included, by weight of the total composition, from about 1% to about 95%, preferably from about 30% to about 70%. The polar solvents useful herein include water, polyhydric alcohols such as glycerin, 1,3-butylene glycol, propylene glycol, hexylene glycol, propanediol, ethylene glycol, diethylene glycol, dipropylene glycol, diglycerin, sorbitol, and other sugars that are in liquid form at room temperature. Also useful herein are water-soluble alkoxylated nonionic polymers such as polyethylene glycol. In a preferred embodiment, the present composition may comprise a relatively high level of water to provide a product profitable. In this preferred embodiment, water is included in an amount of from about 30% to about 95%, more preferably from about 50% to about 70% of the total composition. Polar solvents commercially available herein include: glycerin available from Asahi Denka; propylene glycol with the trade name LEXOL PG-865/855 available from Inolex, 1, 2-propylene glycol USP available from BASF; 1,3-butylene glycol available from Daisel Kagaku Kogyo; dipropylene glycol with the same trade name available from BASF; diglycerin with the trade name diglycerol available from Solvay GmbH, polyethylene glycol under the trade name PEG 300 available from Doe Chemical Company, and 70% sorbitol solution available from Khalista (Liuzhou) Chemical Industries, Ltd. Free of abrasive material The composition of the present invention is practically free of abrasive material. Specifically, the composition of the present invention has no deliberately included abrasive material. Surprisingly, it has been discovered that the present invention can provide the benefits of a regular dentifrice composition, including those normally attributed to the use of abrasive material, such as cleaning, stain removal, plaque removal, tartar removal, and others. The absence of abrasive material also takes into account the inclusion of certain active agents, such as cetylpyridinium chloride, which otherwise have poor compatibility with abrasive materials, such as silica, and therefore can not be included in a dentifrice composition. Further, Due to the absence of abrasive material, various characteristics can be sought for the toothpaste product. For example, a composition with a transparent appearance can be made. Abrasive materials of which the present composition is practically free are defined as materials having a DOA value of not more than about 150 mL / 100 g, preferably not more than about 100 mL / 100 g, and have a particle size of about 5. μm to approximately 50 μm. The abrasive materials herein can be distinguished from the materials useful as binders. The materials from which the present invention is free include: inorganic minerals such as gels and silica precipitates; aluminas; hydrated alumina, calcium carbonate, titanium dioxide, talcum, calcium dioxide, and resinous abrasive materials such as particulate condensation products of urea and formaldehyde. Additional binder material The composition of the present invention may further comprise an additional binder material that further contributes rheology to the composition, or provide some mouth feel when used. When included, the additional binder material is selected from those that are compatible with the hydrophilic clay material, and are included so that the total amount of hydrophilic clay material and additional binder material is from about 0.1% to about 10% of the composition. total, and provides a viscosity of approximately 10,000 Pa.sa approximately 450,000 Pas, preferably from approximately 10,000 Pa.s to approximately 250,000 Pa.s. The modified cellulose polymers are binder materials useful herein to build a continuous structure to the composition. Modified cellulose polymers useful herein include sodium carboxymethylcellulose, polyvinylpyrrolidone, hydroxyethylpropylcellulose, hydroxybutylmethylcellulose, hydroxypropylmethylcellulose, and hydroxyethylcellulose. Particularly useful commercially available materials include sodium carboxymethyl cellulose with the trade name BLANOSE series, OPTICEL 100, and AQUALON series from Hercules; hydroxyethylpropylcellulose with the trade name KLUCEL series of Hercules, hydroxypropylmethylcellulose with the trade name TF-E25 of YIXING CITY NO.8 CHEMICAL PLANT and with the trade name BENECEL series of Hercules. Carboxyvinyl anionic polymers are binder materials useful herein to construct a three-dimensional structure in combination with the hydrophilic clay materials described above. The carboxy vinyl anionic polymers useful herein include those bearing the trademark CARBOPOL (or carbomer) series such as CARBOPOL 956, 934, 940, 941, 1342, ETD 2020, ULTREZ 10"from Noveon Inc., CARBOPOL 934, 940 , 974 P from BF Goodrich and SYNTHALEN K available from 3V Company The anionic polymers derived from natural rubber are binding materials useful herein to add effectively viscosity. Anionic polymers derived from natural rubber useful herein include carrageenan, xanthan gum, gelana gum, and locust bean gum. Particularly useful commercially available materials include xanthan gum under the tradename KELDENT series available from CP Kelco, and under the tradename RHODICARE series from Rhodia; gelana gum with the trade name KELCOGEL series of CP Kelco; and locust bean gum with the trade name GELLOID LB series from FMC BioPolymer. Other binder materials useful herein are starch and carrageenan. Carrageenan is commercially available under the trade name VISCARI series and GELCARIN series from FMC BioPolymer, under the trade name MEYPRO-SOL series from Meyhall AG, and under the trade name GENUVISCO series, GENU series and GENUTINE series from CP Kelco.

Additional components The composition of the present invention may include other additional components, which may be chosen by the technician according to the desired characteristics of the final product and which are suitable for making the cosmetic or aesthetically acceptable composition or to provide them with additional use benefits . These additional components are generally used individually at levels no greater than about 5% by weight of the composition. Surfactants may be incorporated into the components of the present invention, as an ingredient to aid in the complete dispersion of the toothpaste throughout the oral cavity when applied to it, as well as to improve cosmetic acceptability and foaming properties. The surfactants that can be included in the present composition include anionic, nonionic, or amphoteric compounds, with anionic compounds being preferred. Suitable examples of anionic surfactants are higher alkyl sulfates such as sodium or potassium lauryl sulfate, of which monoglycerides of higher fatty acid monoglycerides are preferred, such as the monoglyceride salt of hydrogenated coconut oil fatty acid monoglyceride, alkylsulfonates such as sodium dodecylbenzenesulfonate, higher fatty sulphoacetates, higher fatty acid esters of 1,2-dihydroxypropanesulfonate. Examples of water-soluble nonionic surfactants are the condensation products of ethylene oxide with various hydrogen-containing compounds which are reactive with them and which have long hydrophobic chains (e.g., aliphatic chains of about 12 to 20 carbon atoms), whose condensation products contain hydrophilic polyoxyethylene entities, such as condensation products of poly (ethylene oxide) with fatty acids, fatty alcohols, fatty amides and other fatty entities, and with propylene oxide and polypropylene oxides, for example, Pluronic materials such as Pluronic F127. The surfactant may be present in the present composition in a concentration of from about 0.5 to about 10.0% by weight, preferably from about 1 to about 2% by weight.

Other ingredients that can be incorporated into the dentifrice composition of the present invention include pigments, colorants, flavoring materials and sweeteners. For example, a striped product according to the present invention is obtained in which dyes of contrasting colors are incorporated in each of the components used in the practice of the present invention, the dyes are pharmacologically and physiologically non-toxic when used in the Suggested amounts The colorants used in the present invention include both pigments and colorants. Pigments useful in the present invention include water-insoluble non-toxic pigments, such as titanium dioxide and chromium oxide greens, ultramarine blue and pink and ferric oxides as well as water-insoluble coloring lakes prepared by spreading calcium or aluminum salts of dyes FD &C in alumina, such as green lacquer green FD &C # 1, lacquer FD &C blue # 2, lacquer FD &C R & D # 30, lacquers FD &C # 5 yellow &FD &C # yellow 15 The concentration of the colorant in the present invention is no greater than about 3% by weight. The pigments in the present invention are distinguished from abrasive materials, of which the present composition is practically free, as pigments herein have a particle size in the range of 100 to about 1000 microns, preferably from about 250 to about 500 microns. When present, the pigments are included in the present composition from about 0.5% to about 3% by weight.

Any flavoring or sweetening material may also be incorporated into the components of the present invention. Examples of suitable flavoring constituents are the flavoring oils, for example, the oils of peppermint, peppermint, pyrol, sassafras, clove, sage, eucalyptus, marjoram, cinnamon, lemon, orange, and methyl salicylate. Suitable sweetening agents include sucrose, lactose, maltose, sorbitol, xylitol, sodium cyclamate, perillartin, and sodium saccharin. Conveniently, the flavoring and sweetening agents may together comprise from 0.01% to 5% by weight or more of the preparations. An inhibitor of enzymes, botanical extracts, natural herbal extracts, and others may be included.

EXAMPLES The following examples describe and demonstrate the preferred embodiments that are within the scope of the present invention. The examples are presented for purposes of illustration only, and should not be construed as limitations of the present invention, since many variations thereof are possible without departing from the spirit and scope of the present invention. The following dentifrice compositions are formed by the following components using the preparation method described herein.

Compositions for Examples 1-5 ' Compositions for Examples 6-10 Definition of components * 1 Sodium fluoride: NaF, available from Jinan Chemical Industry Co. Ltd. * 2 Sorbitol (70% solution): 70% Sorbitol solution, available from Khalista (Liuzhou) Chemicals Industries Ltd. * 3 Glycerin : Glycerin, available from Asahi Denka * 4 Polyethylene glycol: PEG-300, available from Doe Chemical Company * 5 Sodium lauryl sulfate (28% solution): SLSS, available from Rhodia Specialty Chemical Wuxi Co. Ltd * 6 Sodium carboxymethylcellulose: CMC, Available from Zhangjiagang city Sanhui Chemical Industry Co., Ltd * 7 Carbopol: Carbomer 956, available from Noveon, Inc. * 8 Xanthan Gum: KELDENT, available from CP Kelco Inc. * 9 Carrageenan: GELCARIN TP911 available from FMC Corporation, Division of food ingredients * 10 0.2% Magnesium fluorosilicate stratified synthesized: LAPONITE DF, available from Rockwood Additives Limited * 11 Synthesized stratified magnesium silicate: LAPONITE D, available from Rockwood Additives Limited * 12 Precipitated amorphous silica: Zeodent 165, available from J. M. Huber Company * 13 Fumed silica: AEROSOL, available from Cabot & Degussa Corporation * 14 Mica, Coated titanium dioxide: available from Roña * 15 Sodium hydroxide (50% solution): 50% NaOH, available from Guangzhou Chemical Company. * 16 Tetrasodium Pyrophosphate: Tetrasodium Pyrophosphate Anhydrous, available from Lianyungang Duoling Fine Chemical Co. Ltd. * 17 Monobasic Sodium Phosphate Monohydrate: MSP, available from Jiangsu Chengxing Phosphate Chemical Co. Ltd * 18 Trisodic Sodium Phosphate: TSP, available from Jiangsu Jiangyin Phosph Chemicals * 19 Sodium phytate (20% solution): available from Sichuan Chengdu Yason * 20 Saccharin sodium: available from Suzhou Fine Chemical * 21 Stannous fluoride: SnF2, available from Hashimoto * 22 Triclosan: available from Ciba-Geigy Chemicals Ltd. * 23 Cetylpyridinium Chloride: available from Cambrex company * 24 Zinc Carbonate: available from Bruggemann Chemical Preparation Method The dentifrice compositions of Examples 1-10 can be manufactured by any method known to those experienced in the industry, and are conveniently prepared as follows. First, the hydrophilic clay material (component numbers 10-13) is dissolved in water in a container at room temperature, using a helix mixer until homogenous. In a separate main mixing vessel, the sorbitol solution (component number 2), glycerin (component number 3), polyethylene glycol (component number 4), sodium hydroxide solution (component number 15), dye and pigment (number of component 14) as they are present in the composition, the remaining part of water, are mixed together in a stirrer at a rotation speed of 2.6 rad / s (25 rpm) at 3.7 rad / s (35 rpm) at temperature elevated All remaining components except the flavor and the surfactant (component number 5) are added to the main mixing vessel. The container is sealed, a vacuum of about 13.3 kPa (100 mmHg) is created, the homogenizer is turned on rotation speed from 251.3 rad / s (2400 rpm) to 366.5 rad / s (3500 rpm). The mixture obtained is further aerated. To this is added the mixture made in the first step. The obtained mixture is mixed and deaerated. Finally, the flavor and surfactant is added (number of component 5), and the container is closed again hermetically, mixed by the homogenizer at a rotation speed of 2251.3 rad / s (400 rpm) at 366.5 rad / s (3500 rpm) for final homogenization, and de-aerated. The product obtained is pumped out of the package and is supplied to a primary package such as a laminar tube. The illustrative compositions herein have many suitable benefits for a dentrifric product. All compositions provide less abrasion to the surface of the teeth, and are safer to the enamel of the teeth compared to toothpastes containing abrasive material. All compositions provide soft oral feel, easy dispersion, and better range in the area between the teeth compared to toothpastes containing abrasive material. All compositions provide the consumer with better taste perception compared to toothpastes containing abrasive material and the same level of the same flavoring. In addition, all compositions can be manufactured at an economical cost. The compositions of Examples 1-5 provide anticarie, antiplaque, bleach, and antitartar benefits. The compositions of Examples 6-7 provide anticarie benefits, antiplaque, bleach, antisharper, and antigingivitis. The compositions of Examples 8-9 provide anticarie, antiplaque, bleach, antisera, and antimicrobial benefits. The composition of Example 10 provides anticarie, antiplaque, and antitartar benefits. The dimensions and values set forth herein are not to be construed as strictly limited to the exact numerical values mentioned. Instead, unless otherwise specified, each of these dimensions will mean both the mentioned value and also a functionally equivalent range that encompasses that value. For example, a dimension expressed as "40 mm" will be understood as "approximately 40 mm". All documents cited in the Detailed Description of the Invention are incorporated, in the relevant part, as reference herein. The mention of any document should not be construed as an admission that it corresponds to a preceding industry with respect to the present invention. To the extent that any meaning or definition of a term in this written document contradicts any meaning or definition of the term in a document incorporated by reference, the meaning or definition assigned to the term in this written document shall govern. While particular embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the industry that various other changes and modifications may be made without departing from the spirit and scope of the invention. The intention, therefore, is to cover in the appended claims all the changes and modifications that they are within the scope of the invention.

Claims (13)

1. A dentifrice composition comprising: (a) a hydrophilic clay material; (b) a phytic acid compound; (c) an effective amount of an oral care asset; and (d) a polar solvent carrier; wherein the composition is practically free of abrasive material. The dentifrice composition of claim 1 comprising: (a) from about 0.1% to about 10% of the hydrophilic clay material; and (b) from about 0.01% to about 20% of the phytic acid compound. 3. The dentifrice composition of claim 1 wherein the hydrophilic clay material is selected from the group comprising natural and synthesized layered silicate minerals, pyrogenic silicas, precipitated thickening silica, and mixtures thereof. 4. The dentifrice composition of claim 3 wherein the hydrophilic clay material is a synthesized layered magnesium silicate. 5. The dentifrice composition of claim 1 further comprising an additional binder material selected from the group formed of modified cellulose polymers, carboxyvinyl polymers, anionic polymers derived from natural rubber, and mixtures thereof. 6. The dentifrice composition of claim 1 wherein the oral care active is selected from the group consisting of anticalculus agents, stannous ion sources, fluoride ion sources, bleaching agents, antimicrobial agents, antiplaque agents, anti-inflammatory agents, nutrients, antioxidants. , antiviral agents, analgesics and anesthetics, stratified material containing zinc, and mixtures of these. 7. The dentifrice composition of claim 6 wherein the oral care active is selected from the group consisting of fluoride ion sources, stannous ion sources, pyrophosphate salts, polyphosphate salts, hydrogen peroxide, triclosan, and mixtures thereof. . 8. The dentifrice composition of claim 6 wherein the oral care active is an anticarie active selected from the group consisting of cetylpyridinium chloride, sources of stannous ion, and mixtures thereof. 9. The dentifrice composition of claim 6 wherein the oral care active is a stratified material containing zinc having a relative lability of zinc greater than about 25%. The dentifrice composition of claim 9 wherein the layered zinc-containing material is selected from the group consisting of basic zinc carbonate, zinc hydroxycarbonate, copper and zinc hydroxycarbonate, auricalcite, copper and zinc hydroxycarbonate, rosesite, phyllosilicate containing zinc ions, double stratified hydroxide, double hydroxyl salts, and mixtures thereof. 11. The dentifrice composition of claim 9 wherein the stratified material containing zinc is basic zinc carbonate. The dentifrice composition of claim 1 wherein the polar solvent carrier comprises, by weight of the total composition, from about 30% to about 95% water. 13. A method for cleaning the teeth without the use of abrasive material comprising the steps of brushing the teeth with the dentifrice composition of claim 1.