CA2177321A1 - Silica abrasive dentifrice of reduced stringiness and improved flavor - Google Patents
Silica abrasive dentifrice of reduced stringiness and improved flavorInfo
- Publication number
- CA2177321A1 CA2177321A1 CA002177321A CA2177321A CA2177321A1 CA 2177321 A1 CA2177321 A1 CA 2177321A1 CA 002177321 A CA002177321 A CA 002177321A CA 2177321 A CA2177321 A CA 2177321A CA 2177321 A1 CA2177321 A1 CA 2177321A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- dentifrice
- cellulose
- present
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/54—Polymers characterized by specific structures/properties
- A61K2800/542—Polymers characterized by specific structures/properties characterized by the charge
- A61K2800/5422—Polymers characterized by specific structures/properties characterized by the charge nonionic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/54—Polymers characterized by specific structures/properties
- A61K2800/542—Polymers characterized by specific structures/properties characterized by the charge
- A61K2800/5424—Polymers characterized by specific structures/properties characterized by the charge anionic
Abstract
There is disclosed a flavored silica abrasive dentifrice which delivers higher levels and intensity of flavor and exhibits less stringiness the dentifrice having incorporated therein a cellulose gel comprised of a coprocessed mixture of microcrystalline cellulose and a cellulose gum such as carboxymethylcellulose.
Description
- Sili~ ~hr~ive nentifrice of Reduce~
Strin~iness ~nd Improved Fl~vor s 1. Field of the Inventiorl This invention relates to silica abrasive dentifrice compositions, especially to10 silica abrasive toothpastes and dental gels having improved physical properties and flavor.
2. The Prior Art A thickening agent is commonly employed in dentifrice compositions to prevent separation of ingredients in storage, promote dispersibility and retention in use as on a toothbrush. Such thickeners are generally hydrophilic colloids which disperse inaqueous media. The most widely used thickeners are cellulose gums because they are cheap and their quality can be closely controlled. Carboxymethylcellulose is a 20 widely used gum thickener in silica abrasive dentifrices but such dentifrices often exhibit excessive "stringiness" when extruded from a tube. Thus it has been found that the use of cellulose gums in the preparalion of silica abrasive toothpastes or gels results in products that form a stringy tail which is attached to the end segment of the toothpaste portion extruded from a tube. If an excessive amount of tail forms, the 5 dentifrice is characterized as having too much stringiness. Consumers view stringiness as aesthetically unpleasing. Consumers have come to expect a sharp-breaking paste such as provided by conventional high abrasive dentifrices. Further, the tail can unintentionally get onto the threads of the cap, neck and other portions of the tube creating an unappealing messy appearance to the product.
In addition to the stringiness problem, silica abrasive dentifrices have been found, for a given quantity of flavorant, to exhibit poor quality and distorted flavor profiles when compared to other abrasive dentifrices as for example, dicalcium phosphate abrasive toothpastes. The flavor distortion is believed to be caused by the 3 5 absorption of some of the flavor components onto the silica particle surface which then distorts the flavor profile.
Summary of the Invention The present invention relates to a silica abrasive dentifrice which exhibits reduced stringiness and improved flavor quality which dentifrice is comprised of a silica dental abrasive, a humectant, water, flavor and a cellulose gel formed from a co-processed mixture of microcrystalline cellulose and a cellulose gum.
Description of the Preferred Embodiments The dentifrice compositions of the present invention preferably contain from about 15 to about 30% by weight and more preferably about 18 to about 24% by weight of a silica abrasive. The silica abrasive used herein generally has an average particle size ranging between about 0.1 to 30 microns, preferably 5 to about 15 microns. Silica abrasive materials preferred in the practice of the present invention are those marketed by the J. M. Huber Corporation under the trade-mark "Zeodent" particularly the silica carrying the designation Zeodent 115.
The cellulose gel used as a thickener in the practice of the present invention may be a cellulose gel formed from a dried, spray dried or bulk dried, co-processed, mixture of a microcrystalline cellulose and a cellulose gum such as carboxymethylcellulose, xanthan gum or sodium alginate.
Examples of such preferred cellulose gels are those sold by the FMC Corporation under the trade-mark Avicel.
These cellulose gels, useful in the practice of the present invention, generally contain about 80 to about 90% by weight microcrystalline cellulose and about 10 to about 20% by weight cellulose gum. The particle size range of the gel is from submicron, that is, less than 0.2 micron to about 100 microns, and preferably about 0.2 to about 20 microns. A cellulose gel preferred for use in the practice of the present invention is Avicel RC-591-F which is a spray dried cellulose gel having the following composition and properties:
% Microcrystalline Cellulose 88 % Colloidal (0.2 micron) 70 & Carboxymethyl Cellulose 12 Initial Viscosity 39-175 at 1.2%
Set-Up Viscosity 1250 cps at 1.2%
Initial Viscosity: 120 secs. using a Brookfield~ RVT
Viscometer #1 spindle at 20 rpms.
**Set-Up Viscosity: 24 hours using a Brookfield~ RVT Visco-meter #3 spindle at 20 rpms.
The cellulose gel is present in the dentifrice compositions of the present invention preferably at a concentration of about 0.1 to about 1.0% by weight and more preferably about 0.3 to about 0.5% by weight.
The vehicle used in the dentifrice compositions of this invention is conventional and generally comprises about 6 to about 60% by weight of water and about 20 to about 70% by weight of humectant. The humectant content preferably ranges from about 40 to about 60% on a pure basis and the water content preferably ranges from about 10 to about 40%, and most preferably about 12 to about 20% by weight.
Humectants suitable for use in these dentifrice compositions include, for example, sorbitol (usually in the form of a 70% aqueous solution), glycerine, propylene glycol, xylitol, and/or polyethylene glycol (e.g. polyethylene glycol 400-600), especially mixtures of glycerine, sorbitol and polyethylene glycol.
In the dentifrice preparations of the present invention a fluoride ion releasing compound in an amount which releases about 25 to about 5,000 ppm of fluoride ion and preferably about 800 to about 1,500 ppm of fluoride ion may be incorporated in the dentifrice. Fluoride compounds useful in the practice of the present invention include alkali metal fluorides such as sodium fluoride and stannous fluoride and sodium monofluorophosphate.
It will be understood that gum thickeners may be included in the dentifrice compositions of the present invention. Examples of such gum thickeners include xanthan gum, hydroxyethylcellulose and water-soluble salts of cellulose ethers such as carboxymethylcellulose and hydroxyethylcellulose.
Natural gums such as carrageenan (Irish moss, Viscarin), gum karaya, gum arabic, and gum tragacanth can also be used. Also useful are water-scluble, hydrophilic colloidal carboxyvinyl polymers such as those available from the B. F. Goodrich Company under the trade-mark Carbopol 940P, 971P. Gum thickeners are included in the dentifrice compositions of the present invention preferably at a concentration of about 0.25 to about 2.5% by weight and more preferably about 1.0 to about 1.5% by weight.
Surfactants may be included in the dentifrice compositions of the present invention at a concentration of about 0.8 to 2.5% by weight and preferably about 1.0 to about 1.5% by weight. Examples of suitable surfactants include water-soluble salts of higher fatty acid monoglyceride monosulfates, such as the sodium salt of monosulfated mono-glyceride of hydrogenated coconut oil fatty acids, higher alkyl sulfates such as sodium lauryl sulfate, alkylaryl sulfonates such as sodium dodecyl benzene sulfonate, higher alkyl sulfo-acetates such as sodium lauryl sulfoacetates, higher fatty acid esters of 1,2 dihydroxy propane sulfonate, and the substantially saturated higher aliphatic acyl amides of lower aliphatic amino carboxylic acid compounds, such as those having 12 to 16 carbon atoms in the fatty acid, alkyl or acyl radicals, and the like.
Examples of suitable flavoring constituents useful in the practice of the present invention are flavoring oils, e.g. oil of spearmint, peppermint, wintergreen, sassafras, clove, sage, eucalyptus, marjoram, cinnamon, lemon, and orange, and methyl salicylate. The flavor oil is incorporated in the dentifrice composition of the present invention of a concentration of about 0.1 to 2.0% by weight and preferably abGut 0.5 to about 1.5% by weight.
Sweetening agents may be used in the preparation of the dentifrice compositions of the present invention. Suitable 4a sweetening agents include sucrose, lactose, maltose, sorbitol, xylitol, sodium cyclamate, perillartine, aspartyl phenyl alanine, methyl ester, saccharine and the like. The sweetening agent comprises from about 0.1% to about 2% by weight of the dentifrice composition.
Pyrophosphate salts having anti-tartar efficacy such as a dialkali or tetra-alkali metal pyrophosphate salts such 4 2 7 4 2 7' 2K2P27~ Na2H2P2O7, and K2H2P o long chain polyphosphates such as sodium hexametaphosphate and cyclic phosphates such as sodium trimetaphosphate may also be incorporated in the dentifrice compositions of the present invention preferably at a concentration of about 0.5 to about 8.0% by weight and more preferably about 1.5 to about 3% by weight.
Antibacterial agents may also be included in the oral compositions of the present invention. Especially useful are non-cationic antibacterial agents which are based on phenolic and bisphenolic compounds, halogenated diphenyl ether, benzoate esters and carbanilides. Examples of such compounds are 4-chlorophenol, 2,2'-trichloro-2-hydroxy-diphenyl ether (Triclosan), esters of p-hydroxybenzoic acid, especially methyl, ethyl, propyl, butyl and benzyl esters, 3,4,4'-tri-chlorocarbanilide and 3,3',4-trichlorocarbanilide. Triclosan in amounts ranging from 0.03% to 1% is preferred for use in the compositions of the present invention. Nonionic anti-microbial agents such as sesquiterpene alcohols such as merolidol and bisabolol are also useful in the present invention.
4b -Tooth whitening agents may also be included in the oral compositions of the present invention. Especially useful are oxidizing agents such as calcium peroxide, hydrogen peroxide, urea peroxide, peracetic acid, sodium percarbonate. The amount S of active oxygen in such oral compositions can vary from 0.1% to 5% by weight and preferably about 0.5% to about 2% by weight.
The dentifrice composition of the present invention may be prepared by mixing the ingredients wherein a first premix is prepared by dispersing a cellulose gel with a 10 portion of the humectant and water. A second premix is prepared by mixing water with a fluoride compound such as sodium fluoride or sodium monofluorophosphate, and asweetener such as saccharin are then added and mixed. A gel premix is prepared by dispersing a gum thickener and antitartar salt in a second portion of the humectant.
After dispersion of the gel premix ingredients, the gel premix is combined with the 15 second premix ingredients, to which is added a silica polishing agent such as Zeodent 11 5, a surfactant, flavor, and pigment. Other optional ingredients may then be added to the combined premixes. The combined second and gel premixes and first premix are added-sequentially to a suitable high speed mixer. These ingredients are then mixed under vacuum for about 15-30 minutes. The resulting gel or paste is then 20 tubed.
The following examples are further illustrative of the present invention, but it is understood that the invention is not limited thereto. All amounts and proportions referred to herein and in the appended claims are by weight unless otherwise 2 5 indicated.
Example I
A toothpaste composition of the present invention containing a cellulose gel 30 having a composition designated "A" was prepared in accordance with the practice of the present invention. A second comparative toothpaste composition designated "B"
was prepared in which the cellulose gel was not included in the composition. Theingredients of co"")osilions A and B are listed below:
2 ~ 7732 1 Composition Wt%
In~redient A R
Sorbitol 46.307 34.557 Glycerine 10.000 22.00 Polyethylene glycol 3.00 3.00 Carboxymethylcellulose 0.45 0.50 Avicel RC591-F 0.30 Tetrasodium pyrophosphate 0.50 0.50 TiO2 0.30 0.30 Saccharin 0.25 0.25 NaF 0.243 0.243 Deionized Water 12.00 12.00 Zeodent 115 22.00 22.00 Sylox 15' 2.50 2.50 Flavor-' 0.95 0.95 Sodium lauryl sulfate 1.20 1.20 ~ Silica thickener available from W.R. Grace '' Spearmint / peppermint mixture.
Composition A was prepared by mixing 15% sorbitol together with Avicel RC591-F until dispersed followed by the addition of 3% by weight water to prepare a first premix. A second premix was prepared by mixing sodium fluoride and saccaharin with water until dissolved. A gel premix was prepared by mixing the glycerin, carboxymethylcellulose, tetrasodium pyrophosphate and Ti02 ingredients with the remainder of the sorbitol. The second premix and gel premix were then combined and transferred to a DOPP mixer followed by the first premix. Zeodent 115, NaF, flavor and sodium lauryl sulfate were added to the mixture, and the ingredients mixed under vacuum for about 15 minutes to obtain a homogeneous paste.
Composition B was prepared in a similar manner except Avicel RC 591 F was not used in its preparation.
To assess the flavor release properties of compositions A and B, test specimens were prepared which were composed of an equal part mixture of undiluted toothpaste co",posilion, toothpaste composition diluted 1 :1 with water and toothpaste composition diluted 3:1 with water (ratios are weight ratios).
.
The flavor intensity of toothpaste compositions A and B was determined using a gas chromatograph. In this determination of flavor intensity, 5 milliliters (ml) of the toothpaste specimen is placed into a 22 ml vial and equibrated at 60C for an hour.
Strin~iness ~nd Improved Fl~vor s 1. Field of the Inventiorl This invention relates to silica abrasive dentifrice compositions, especially to10 silica abrasive toothpastes and dental gels having improved physical properties and flavor.
2. The Prior Art A thickening agent is commonly employed in dentifrice compositions to prevent separation of ingredients in storage, promote dispersibility and retention in use as on a toothbrush. Such thickeners are generally hydrophilic colloids which disperse inaqueous media. The most widely used thickeners are cellulose gums because they are cheap and their quality can be closely controlled. Carboxymethylcellulose is a 20 widely used gum thickener in silica abrasive dentifrices but such dentifrices often exhibit excessive "stringiness" when extruded from a tube. Thus it has been found that the use of cellulose gums in the preparalion of silica abrasive toothpastes or gels results in products that form a stringy tail which is attached to the end segment of the toothpaste portion extruded from a tube. If an excessive amount of tail forms, the 5 dentifrice is characterized as having too much stringiness. Consumers view stringiness as aesthetically unpleasing. Consumers have come to expect a sharp-breaking paste such as provided by conventional high abrasive dentifrices. Further, the tail can unintentionally get onto the threads of the cap, neck and other portions of the tube creating an unappealing messy appearance to the product.
In addition to the stringiness problem, silica abrasive dentifrices have been found, for a given quantity of flavorant, to exhibit poor quality and distorted flavor profiles when compared to other abrasive dentifrices as for example, dicalcium phosphate abrasive toothpastes. The flavor distortion is believed to be caused by the 3 5 absorption of some of the flavor components onto the silica particle surface which then distorts the flavor profile.
Summary of the Invention The present invention relates to a silica abrasive dentifrice which exhibits reduced stringiness and improved flavor quality which dentifrice is comprised of a silica dental abrasive, a humectant, water, flavor and a cellulose gel formed from a co-processed mixture of microcrystalline cellulose and a cellulose gum.
Description of the Preferred Embodiments The dentifrice compositions of the present invention preferably contain from about 15 to about 30% by weight and more preferably about 18 to about 24% by weight of a silica abrasive. The silica abrasive used herein generally has an average particle size ranging between about 0.1 to 30 microns, preferably 5 to about 15 microns. Silica abrasive materials preferred in the practice of the present invention are those marketed by the J. M. Huber Corporation under the trade-mark "Zeodent" particularly the silica carrying the designation Zeodent 115.
The cellulose gel used as a thickener in the practice of the present invention may be a cellulose gel formed from a dried, spray dried or bulk dried, co-processed, mixture of a microcrystalline cellulose and a cellulose gum such as carboxymethylcellulose, xanthan gum or sodium alginate.
Examples of such preferred cellulose gels are those sold by the FMC Corporation under the trade-mark Avicel.
These cellulose gels, useful in the practice of the present invention, generally contain about 80 to about 90% by weight microcrystalline cellulose and about 10 to about 20% by weight cellulose gum. The particle size range of the gel is from submicron, that is, less than 0.2 micron to about 100 microns, and preferably about 0.2 to about 20 microns. A cellulose gel preferred for use in the practice of the present invention is Avicel RC-591-F which is a spray dried cellulose gel having the following composition and properties:
% Microcrystalline Cellulose 88 % Colloidal (0.2 micron) 70 & Carboxymethyl Cellulose 12 Initial Viscosity 39-175 at 1.2%
Set-Up Viscosity 1250 cps at 1.2%
Initial Viscosity: 120 secs. using a Brookfield~ RVT
Viscometer #1 spindle at 20 rpms.
**Set-Up Viscosity: 24 hours using a Brookfield~ RVT Visco-meter #3 spindle at 20 rpms.
The cellulose gel is present in the dentifrice compositions of the present invention preferably at a concentration of about 0.1 to about 1.0% by weight and more preferably about 0.3 to about 0.5% by weight.
The vehicle used in the dentifrice compositions of this invention is conventional and generally comprises about 6 to about 60% by weight of water and about 20 to about 70% by weight of humectant. The humectant content preferably ranges from about 40 to about 60% on a pure basis and the water content preferably ranges from about 10 to about 40%, and most preferably about 12 to about 20% by weight.
Humectants suitable for use in these dentifrice compositions include, for example, sorbitol (usually in the form of a 70% aqueous solution), glycerine, propylene glycol, xylitol, and/or polyethylene glycol (e.g. polyethylene glycol 400-600), especially mixtures of glycerine, sorbitol and polyethylene glycol.
In the dentifrice preparations of the present invention a fluoride ion releasing compound in an amount which releases about 25 to about 5,000 ppm of fluoride ion and preferably about 800 to about 1,500 ppm of fluoride ion may be incorporated in the dentifrice. Fluoride compounds useful in the practice of the present invention include alkali metal fluorides such as sodium fluoride and stannous fluoride and sodium monofluorophosphate.
It will be understood that gum thickeners may be included in the dentifrice compositions of the present invention. Examples of such gum thickeners include xanthan gum, hydroxyethylcellulose and water-soluble salts of cellulose ethers such as carboxymethylcellulose and hydroxyethylcellulose.
Natural gums such as carrageenan (Irish moss, Viscarin), gum karaya, gum arabic, and gum tragacanth can also be used. Also useful are water-scluble, hydrophilic colloidal carboxyvinyl polymers such as those available from the B. F. Goodrich Company under the trade-mark Carbopol 940P, 971P. Gum thickeners are included in the dentifrice compositions of the present invention preferably at a concentration of about 0.25 to about 2.5% by weight and more preferably about 1.0 to about 1.5% by weight.
Surfactants may be included in the dentifrice compositions of the present invention at a concentration of about 0.8 to 2.5% by weight and preferably about 1.0 to about 1.5% by weight. Examples of suitable surfactants include water-soluble salts of higher fatty acid monoglyceride monosulfates, such as the sodium salt of monosulfated mono-glyceride of hydrogenated coconut oil fatty acids, higher alkyl sulfates such as sodium lauryl sulfate, alkylaryl sulfonates such as sodium dodecyl benzene sulfonate, higher alkyl sulfo-acetates such as sodium lauryl sulfoacetates, higher fatty acid esters of 1,2 dihydroxy propane sulfonate, and the substantially saturated higher aliphatic acyl amides of lower aliphatic amino carboxylic acid compounds, such as those having 12 to 16 carbon atoms in the fatty acid, alkyl or acyl radicals, and the like.
Examples of suitable flavoring constituents useful in the practice of the present invention are flavoring oils, e.g. oil of spearmint, peppermint, wintergreen, sassafras, clove, sage, eucalyptus, marjoram, cinnamon, lemon, and orange, and methyl salicylate. The flavor oil is incorporated in the dentifrice composition of the present invention of a concentration of about 0.1 to 2.0% by weight and preferably abGut 0.5 to about 1.5% by weight.
Sweetening agents may be used in the preparation of the dentifrice compositions of the present invention. Suitable 4a sweetening agents include sucrose, lactose, maltose, sorbitol, xylitol, sodium cyclamate, perillartine, aspartyl phenyl alanine, methyl ester, saccharine and the like. The sweetening agent comprises from about 0.1% to about 2% by weight of the dentifrice composition.
Pyrophosphate salts having anti-tartar efficacy such as a dialkali or tetra-alkali metal pyrophosphate salts such 4 2 7 4 2 7' 2K2P27~ Na2H2P2O7, and K2H2P o long chain polyphosphates such as sodium hexametaphosphate and cyclic phosphates such as sodium trimetaphosphate may also be incorporated in the dentifrice compositions of the present invention preferably at a concentration of about 0.5 to about 8.0% by weight and more preferably about 1.5 to about 3% by weight.
Antibacterial agents may also be included in the oral compositions of the present invention. Especially useful are non-cationic antibacterial agents which are based on phenolic and bisphenolic compounds, halogenated diphenyl ether, benzoate esters and carbanilides. Examples of such compounds are 4-chlorophenol, 2,2'-trichloro-2-hydroxy-diphenyl ether (Triclosan), esters of p-hydroxybenzoic acid, especially methyl, ethyl, propyl, butyl and benzyl esters, 3,4,4'-tri-chlorocarbanilide and 3,3',4-trichlorocarbanilide. Triclosan in amounts ranging from 0.03% to 1% is preferred for use in the compositions of the present invention. Nonionic anti-microbial agents such as sesquiterpene alcohols such as merolidol and bisabolol are also useful in the present invention.
4b -Tooth whitening agents may also be included in the oral compositions of the present invention. Especially useful are oxidizing agents such as calcium peroxide, hydrogen peroxide, urea peroxide, peracetic acid, sodium percarbonate. The amount S of active oxygen in such oral compositions can vary from 0.1% to 5% by weight and preferably about 0.5% to about 2% by weight.
The dentifrice composition of the present invention may be prepared by mixing the ingredients wherein a first premix is prepared by dispersing a cellulose gel with a 10 portion of the humectant and water. A second premix is prepared by mixing water with a fluoride compound such as sodium fluoride or sodium monofluorophosphate, and asweetener such as saccharin are then added and mixed. A gel premix is prepared by dispersing a gum thickener and antitartar salt in a second portion of the humectant.
After dispersion of the gel premix ingredients, the gel premix is combined with the 15 second premix ingredients, to which is added a silica polishing agent such as Zeodent 11 5, a surfactant, flavor, and pigment. Other optional ingredients may then be added to the combined premixes. The combined second and gel premixes and first premix are added-sequentially to a suitable high speed mixer. These ingredients are then mixed under vacuum for about 15-30 minutes. The resulting gel or paste is then 20 tubed.
The following examples are further illustrative of the present invention, but it is understood that the invention is not limited thereto. All amounts and proportions referred to herein and in the appended claims are by weight unless otherwise 2 5 indicated.
Example I
A toothpaste composition of the present invention containing a cellulose gel 30 having a composition designated "A" was prepared in accordance with the practice of the present invention. A second comparative toothpaste composition designated "B"
was prepared in which the cellulose gel was not included in the composition. Theingredients of co"")osilions A and B are listed below:
2 ~ 7732 1 Composition Wt%
In~redient A R
Sorbitol 46.307 34.557 Glycerine 10.000 22.00 Polyethylene glycol 3.00 3.00 Carboxymethylcellulose 0.45 0.50 Avicel RC591-F 0.30 Tetrasodium pyrophosphate 0.50 0.50 TiO2 0.30 0.30 Saccharin 0.25 0.25 NaF 0.243 0.243 Deionized Water 12.00 12.00 Zeodent 115 22.00 22.00 Sylox 15' 2.50 2.50 Flavor-' 0.95 0.95 Sodium lauryl sulfate 1.20 1.20 ~ Silica thickener available from W.R. Grace '' Spearmint / peppermint mixture.
Composition A was prepared by mixing 15% sorbitol together with Avicel RC591-F until dispersed followed by the addition of 3% by weight water to prepare a first premix. A second premix was prepared by mixing sodium fluoride and saccaharin with water until dissolved. A gel premix was prepared by mixing the glycerin, carboxymethylcellulose, tetrasodium pyrophosphate and Ti02 ingredients with the remainder of the sorbitol. The second premix and gel premix were then combined and transferred to a DOPP mixer followed by the first premix. Zeodent 115, NaF, flavor and sodium lauryl sulfate were added to the mixture, and the ingredients mixed under vacuum for about 15 minutes to obtain a homogeneous paste.
Composition B was prepared in a similar manner except Avicel RC 591 F was not used in its preparation.
To assess the flavor release properties of compositions A and B, test specimens were prepared which were composed of an equal part mixture of undiluted toothpaste co",posilion, toothpaste composition diluted 1 :1 with water and toothpaste composition diluted 3:1 with water (ratios are weight ratios).
.
The flavor intensity of toothpaste compositions A and B was determined using a gas chromatograph. In this determination of flavor intensity, 5 milliliters (ml) of the toothpaste specimen is placed into a 22 ml vial and equibrated at 60C for an hour.
5 The vapors eluted into the he~dsp~ce of the vial are collected by a syringe and injected into the inlet of the gas chromatograph. The various components of the flavor oils retained on the gas chromatograph column elute out of the column at different retention times. Retention times of the eluted vapor on the gas chromatograph column are used to identify the different flavor components. The intensity of the flavor 10 component is quantified by the area under the peak associated with the particular flavor component. The peak intensity is a measure of the amount of flavor released from the dentifrice; the higher the area under the peak the greater is the flavor intensity. The intensity results are recorded in Table I below.
For purposes of further comparison, a commercial silica abrasive gel dentifrice designated Composition C was also evalu~ted for flavor intensity. These comparative results are also recorded in Table I below.
Table I
Total Flavor Release From Mixed Dentifrices Composition Area under Peak x 1 o6 Time - Weeks 2 5 A 27.2 26.9 2~.9 B 25.8 24.9 24.0 - C 26.2 26.0 23.8 The results recorded in Table I show that Composition A, which contains Avicel, 30 yields higher tlavor release than Composition B in which Avicel is absent as well as Composition C, the commercial silica abrasive gel dentifrice.
Fx~ le ll To ~ssess the stringiness of compositions A and B, toothpaste samples were sandwiched between two parallel stainless steel plates and an electrical current of 0.1-100 milliamperes was passed læl~/ecn the plates. The toothpaste sample served as a conducting medium for the current. The plates were then slowly drawn apart, and a string of paste was formed between the separating plates. Current flow stoppedwhen the string of toothpaste was broken. The distance between the plates at string break point was measured, and this distance was a measure of the stringiness of the toothpaste sampie. Stringiness was then quantified numerically by a "String Value"
5 determined from a graph of the current as a function of time. The lower the String Value the less stringy and messy and the more consumer acceptable is the product.
The String Value of compositions A, B as well as composition C a commercial silica abrasive gel are recorded in Table ll below:
Table ll Composition Strin~ V~ e A 5.1 B 10.0 C 14.1 The String Values recorded in Table ll indicate that the dentifrice composition of 20 the present invention, Composition A, has a String Value which is substantially less than comparative dentifrice Composition B in which a cellulose gel ingredient is absent as well as a commercial silica abrasive tooll,pa~le (Composition C).
For purposes of further comparison, a commercial silica abrasive gel dentifrice designated Composition C was also evalu~ted for flavor intensity. These comparative results are also recorded in Table I below.
Table I
Total Flavor Release From Mixed Dentifrices Composition Area under Peak x 1 o6 Time - Weeks 2 5 A 27.2 26.9 2~.9 B 25.8 24.9 24.0 - C 26.2 26.0 23.8 The results recorded in Table I show that Composition A, which contains Avicel, 30 yields higher tlavor release than Composition B in which Avicel is absent as well as Composition C, the commercial silica abrasive gel dentifrice.
Fx~ le ll To ~ssess the stringiness of compositions A and B, toothpaste samples were sandwiched between two parallel stainless steel plates and an electrical current of 0.1-100 milliamperes was passed læl~/ecn the plates. The toothpaste sample served as a conducting medium for the current. The plates were then slowly drawn apart, and a string of paste was formed between the separating plates. Current flow stoppedwhen the string of toothpaste was broken. The distance between the plates at string break point was measured, and this distance was a measure of the stringiness of the toothpaste sampie. Stringiness was then quantified numerically by a "String Value"
5 determined from a graph of the current as a function of time. The lower the String Value the less stringy and messy and the more consumer acceptable is the product.
The String Value of compositions A, B as well as composition C a commercial silica abrasive gel are recorded in Table ll below:
Table ll Composition Strin~ V~ e A 5.1 B 10.0 C 14.1 The String Values recorded in Table ll indicate that the dentifrice composition of 20 the present invention, Composition A, has a String Value which is substantially less than comparative dentifrice Composition B in which a cellulose gel ingredient is absent as well as a commercial silica abrasive tooll,pa~le (Composition C).
Claims (20)
1. A dentifrice composition which exhibits enhanced flavor intensity and reducedstringiness, the dentifrice being comprised of a silica abrasive, water, humectant, flavor, thickener and a cellulose gel comprised of a coprocessed mixture of a microcrystalline cellulose and a cellulose gum.
2. The dentifrice composition of claim 1 wherein the cellulose gel contains about 80 to about 90% by weight of microcrystalline cellulose and about 10 to about 20% by weight of the cellulose gum.
3. The dentifrice composition of claim 1 wherein the cellulose gum is carboxymethyl-cellulose.
4. The dentifrice composition of claim 1 wherein the cellulose gel is present in the dentifrice at a concentration of about 0.1 to about 1.0% by weight.
5. The dentifrice composition of claim 1 wherein the flavor is present in the dentifrice at a concentration of about 0.1 to about 2 % by weight.
6. The dentifrice composition of claim 1 wherein the silica abrasive is present in the dentifrice at a concentration of about 15 to about 30 % by weight.
7. The dentifrice composition of claim 1 wherein water is present in the composition at a concentration of about 6 to about 60% by weight.
8. The dentifrice composition of claim 1 wherein the humectant is present in thecomposition at a concentration of about 20 to about 70% by weight.
9. The dentifrice composition of claim 1 wherein the thickener is present in thecomposition at a concentration of about 0.10 to about 2.5% by weight.
10. The dentifrice composition of claim 9 wherein the thickener is carboxymethylcellulose.
11. A method for enhancing the flavor intensity and reducing the stringiness of silica abrasive dentifrices which comprises incorporating in the dentifrice containing a silica abrasive, water, humectant, flavor and thickener, a cellulose gel comprised of acoprocessed mixture of microcrystalline cellulose and a cellulose gum.
12. The method of claim 11 wherein the cellulose gel contains about 80 to about 90%
by weight of the microcrystalline cellulose and about 10 to about 20% by weight of the cellulose gum.
by weight of the microcrystalline cellulose and about 10 to about 20% by weight of the cellulose gum.
13. The method of claim 11 wherein the cellulose gum is carboxymethylcellulose.
14. The method of claim 11 wherein the cellulose gel is present in the dentirice at a concentration of about 0.1 to about 1.0% by weight.
15. The method of claim 11 wherein the flavor is present in the dentifrice at a concentration of about 0.1 to about 2% by weight.
16. The method of claim 11 wherein the silica abrasive is present in the dentifrice at a concentration of about 15 to about 30% by weight.
17. The method of claim 11 wherein water is present in the composition at a concentration of about 6 to about 60% by weight.
18. The method of claim 11 wherein the humectant is present in the composition at a concentration of about 20 to about 70% by weight.
19. The method of claim 11 wherein the thickener is present in the composition at a concentration of about 0.25 to about 2.5% by weight.
20. The method of claim 19 wherein the thickener is carboxymethyl cellulose.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/451,289 US5601803A (en) | 1995-05-26 | 1995-05-26 | Silica abrasive dentifrice of reduced stringless and improved flavor |
| US08/451,289 | 1995-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2177321A1 true CA2177321A1 (en) | 1996-11-27 |
Family
ID=23791612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002177321A Abandoned CA2177321A1 (en) | 1995-05-26 | 1996-05-24 | Silica abrasive dentifrice of reduced stringiness and improved flavor |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US5601803A (en) |
| EP (1) | EP0744174B1 (en) |
| KR (1) | KR100448638B1 (en) |
| CN (1) | CN1113643C (en) |
| AR (1) | AR002099A1 (en) |
| AT (1) | ATE223694T1 (en) |
| AU (1) | AU696603B2 (en) |
| BG (1) | BG62874B1 (en) |
| BR (1) | BR9602398A (en) |
| CA (1) | CA2177321A1 (en) |
| CZ (1) | CZ288521B6 (en) |
| DE (1) | DE69623531D1 (en) |
| HK (1) | HK1014654A1 (en) |
| IL (1) | IL118242A (en) |
| MY (1) | MY119002A (en) |
| NO (1) | NO962126L (en) |
| NZ (1) | NZ286538A (en) |
| PL (1) | PL185206B1 (en) |
| RU (1) | RU2127581C1 (en) |
| SG (1) | SG42403A1 (en) |
| ZA (1) | ZA963606B (en) |
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| CA2257407A1 (en) * | 1996-06-07 | 1997-12-11 | Hercules Incorporated | Toothpaste compositions containing fluidized polymer suspensions of carboxymethyl cellulose |
| US6190644B1 (en) * | 1996-11-21 | 2001-02-20 | The Procter & Gamble Company | Dentifrice compositions containing polyphosphate and monofluorophosphate |
| US6350436B1 (en) | 1996-11-21 | 2002-02-26 | The Procter & Gamble Company | Method of reducing staining of stannous in dentifrice compositions |
| US6713049B1 (en) | 1999-11-12 | 2004-03-30 | The Procter & Gamble Company | Oral compositions providing optimal surface conditioning |
| US20060171907A1 (en) * | 1996-11-21 | 2006-08-03 | The Procter & Gamble Company | Oral care compositions providing enhanced whitening and stain prevention |
| US5744703A (en) * | 1997-02-26 | 1998-04-28 | General Electric Company | Process to measure the stringiness of room temperature vulcanizable silicone sealant compositions |
| CN1086189C (en) * | 1997-06-12 | 2002-06-12 | 食品机械和化工公司 | Ultra-fine microcrystalline cellulose compositions and process for their manufacture |
| JPH11199455A (en) * | 1997-12-27 | 1999-07-27 | Lion Corp | Dentifrice powder-containing tooth paste composition |
| US6110446A (en) * | 1998-10-05 | 2000-08-29 | Colgate Palmolive Company | Dual component antiplaque and tooth whitening composition |
| EP1070740B1 (en) * | 1999-07-19 | 2008-01-02 | fit GmbH | Coprocessed polysaccharide product with insoluble carboxymethylcellulose |
| EP1227789B1 (en) | 1999-11-12 | 2004-09-22 | The Procter & Gamble Company | Improved dual phase stannous oral compositions |
| US10470985B2 (en) | 1999-11-12 | 2019-11-12 | The Procter & Gamble Company | Method of protecting teeth against erosion |
| US20070025928A1 (en) * | 1999-11-12 | 2007-02-01 | The Procter & Gamble Company | Stannous oral care compositions |
| US20040146466A1 (en) | 1999-11-12 | 2004-07-29 | The Procter & Gamble Company | Method of protecting teeth against erosion |
| CN1200685C (en) | 1999-11-12 | 2005-05-11 | 宝洁公司 | Improved stannous oral compositions |
| US6869595B2 (en) * | 2001-12-21 | 2005-03-22 | J.M. Huber Corporation | Abrasive compositions for clear toothpaste |
| CA2488158C (en) * | 2002-06-07 | 2011-12-06 | Sunstar Kabushiki Kaisha | Stable oral compositions comprising microcrystalline cellulose and a surface active agent |
| WO2004071322A2 (en) * | 2003-02-05 | 2004-08-26 | Fmc Corporation | Colloidal microcrystalline cellulose toothpaste of reduced stringiness and improved flavor release |
| BRPI0407065A (en) * | 2003-02-05 | 2006-01-17 | Fmc Corp | Toothpaste Composition |
| CN100544700C (en) * | 2003-02-05 | 2009-09-30 | Fmc有限公司 | The dentifrice composition that abrasiveness reduces |
| WO2006012715A1 (en) * | 2004-08-03 | 2006-02-09 | Charilaos Andreopoulos | Composition for treating foot odour and manufacturing process thereof |
| KR100760970B1 (en) * | 2004-11-04 | 2007-10-04 | 김종철 | Tooth paste containing essential oil |
| CN101563064A (en) † | 2006-11-14 | 2009-10-21 | 新时代株式会社 | Oral composition containing crystalline cellulose surface-treated with water-soluble substance |
| US10123953B2 (en) | 2012-06-21 | 2018-11-13 | The Procter & Gamble Company | Reduction of tooth staining derived from cationic antimicrobials |
| BR112014032843B1 (en) * | 2012-06-29 | 2018-07-03 | Colgate-Palmolive Company | ORAL COMPOSITIONS OF HIGH WATER CONTENT UNDERSTANDING MICROCRYSTALLINE CELLULOSE AND CARBOXYMETHYLCELLULOSIS, THEIR METHOD FOR PREPARATION AND USE, AS WELL AS USING MICROCRYSTALLINE CELLULOSE. |
| CN108721140A (en) * | 2018-07-19 | 2018-11-02 | 无锡青禾小贝科技有限公司 | A kind of oral care implement and preparation method thereof |
| WO2020219323A1 (en) | 2019-04-26 | 2020-10-29 | The Procter & Gamble Company | Reduction of tooth staining derived from cationic antimicrobials |
| CN112826761A (en) * | 2021-02-26 | 2021-05-25 | 杭州致英日用百货有限公司 | Preparation method of antibacterial dentifrice |
| CN113908078A (en) * | 2021-11-29 | 2022-01-11 | 水木山海科技(佛山)有限责任公司 | Toothpaste gel and preparation method thereof |
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| US3689637A (en) * | 1969-07-11 | 1972-09-05 | Lever Brothers Ltd | Dentifrice composition |
| ZA737495B (en) * | 1972-10-30 | 1975-05-28 | Colgate Palmolive Co | Toothpastes |
| US4022881A (en) * | 1974-06-18 | 1977-05-10 | Beecham Group Limited | Dentifrice |
| US4313765A (en) * | 1980-09-24 | 1982-02-02 | Merck & Co., Inc. | Synergistic blends of cellulase-free xanthan gum and cellulosics |
| US4427681A (en) * | 1982-09-16 | 1984-01-24 | Richardson-Vicks, Inc. | Thixotropic compositions easily convertible to pourable liquids |
| US4485089A (en) * | 1983-10-17 | 1984-11-27 | Hercules Incorporated | Gel toothpastes |
| US4565692A (en) * | 1983-12-23 | 1986-01-21 | Colgate-Palmolive Company | Extrudable dentifrice |
| US4584189A (en) * | 1984-09-28 | 1986-04-22 | Hercules Incorporated | Bactericidal toothpastes |
| JPS61192750A (en) * | 1985-02-22 | 1986-08-27 | Asahi Chem Ind Co Ltd | Aqueous gel composition |
| US4744987A (en) * | 1985-03-08 | 1988-05-17 | Fmc Corporation | Coprocessed microcrystalline cellulose and calcium carbonate composition and its preparation |
| FR2625676B1 (en) * | 1988-01-07 | 1994-03-04 | Pharmascience Laboratoires | TOOTHPASTE WITH GOOD RATIO / ABRASIVE POWER |
| EP0368130B1 (en) * | 1988-11-09 | 1994-05-04 | The Procter & Gamble Company | Oral compositions |
| GB9126686D0 (en) * | 1991-12-17 | 1992-02-12 | Smithkline Beecham Plc | Novel compositions |
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| US5451401A (en) * | 1993-09-29 | 1995-09-19 | The Procter & Gamble Company | Diphosphonic acid esters as tartar control agents |
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| US5462761A (en) * | 1994-04-04 | 1995-10-31 | Fmc Corporation | Microcrystalline cellulose and glucomannan aggregates |
-
1995
- 1995-05-26 US US08/451,289 patent/US5601803A/en not_active Expired - Lifetime
-
1996
- 1996-05-06 BG BG100571A patent/BG62874B1/en unknown
- 1996-05-07 NZ NZ286538A patent/NZ286538A/en unknown
- 1996-05-07 ZA ZA9603606A patent/ZA963606B/en unknown
- 1996-05-09 SG SG1996009783A patent/SG42403A1/en unknown
- 1996-05-13 IL IL11824296A patent/IL118242A/en not_active IP Right Cessation
- 1996-05-16 AU AU52346/96A patent/AU696603B2/en not_active Ceased
- 1996-05-22 MY MYPI96001923A patent/MY119002A/en unknown
- 1996-05-23 BR BR9602398A patent/BR9602398A/en not_active Application Discontinuation
- 1996-05-24 NO NO962126A patent/NO962126L/en unknown
- 1996-05-24 DE DE69623531T patent/DE69623531D1/en not_active Expired - Lifetime
- 1996-05-24 EP EP96201460A patent/EP0744174B1/en not_active Expired - Lifetime
- 1996-05-24 AT AT96201460T patent/ATE223694T1/en not_active IP Right Cessation
- 1996-05-24 CN CN96110388A patent/CN1113643C/en not_active Expired - Lifetime
- 1996-05-24 RU RU96109829A patent/RU2127581C1/en active
- 1996-05-24 AR ARP960102710A patent/AR002099A1/en active IP Right Grant
- 1996-05-24 PL PL96314417A patent/PL185206B1/en unknown
- 1996-05-24 CA CA002177321A patent/CA2177321A1/en not_active Abandoned
- 1996-05-25 KR KR1019960017938A patent/KR100448638B1/en not_active IP Right Cessation
- 1996-05-27 CZ CZ19961532A patent/CZ288521B6/en not_active IP Right Cessation
-
1998
- 1998-12-28 HK HK98115977A patent/HK1014654A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR9602398A (en) | 1998-04-22 |
| RU2127581C1 (en) | 1999-03-20 |
| BG62874B1 (en) | 2000-10-31 |
| ZA963606B (en) | 1997-11-07 |
| IL118242A (en) | 2000-08-31 |
| KR100448638B1 (en) | 2007-10-17 |
| HK1014654A1 (en) | 1999-09-30 |
| ATE223694T1 (en) | 2002-09-15 |
| US5601803A (en) | 1997-02-11 |
| PL314417A1 (en) | 1996-12-09 |
| NZ286538A (en) | 1998-01-26 |
| CN1138455A (en) | 1996-12-25 |
| MY119002A (en) | 2005-03-31 |
| NO962126L (en) | 1996-11-27 |
| CZ153296A3 (en) | 1996-12-11 |
| EP0744174B1 (en) | 2002-09-11 |
| AU5234696A (en) | 1996-12-05 |
| SG42403A1 (en) | 1997-08-15 |
| KR960040348A (en) | 1996-12-17 |
| AU696603B2 (en) | 1998-09-17 |
| AR002099A1 (en) | 1998-01-07 |
| NO962126D0 (en) | 1996-05-24 |
| EP0744174A1 (en) | 1996-11-27 |
| PL185206B1 (en) | 2003-04-30 |
| CZ288521B6 (en) | 2001-07-11 |
| MX9601758A (en) | 1997-10-31 |
| DE69623531D1 (en) | 2002-10-17 |
| CN1113643C (en) | 2003-07-09 |
| BG100571A (en) | 1997-12-30 |
| IL118242A0 (en) | 1996-09-12 |
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| FZDE | Discontinued |