US20070166245A1 - Propellant free foamable toothpaste composition - Google Patents

Propellant free foamable toothpaste composition Download PDF

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Publication number
US20070166245A1
US20070166245A1 US11/584,939 US58493906A US2007166245A1 US 20070166245 A1 US20070166245 A1 US 20070166245A1 US 58493906 A US58493906 A US 58493906A US 2007166245 A1 US2007166245 A1 US 2007166245A1
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Prior art keywords
suspension
dentifrice
foamed
foam
toothbrush
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Abandoned
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US11/584,939
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Leonard Mackles
William Bess
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Leonard Mackles
William Bess
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Priority to US74004305P priority Critical
Application filed by Leonard Mackles, William Bess filed Critical Leonard Mackles
Priority to US11/584,939 priority patent/US20070166245A1/en
Publication of US20070166245A1 publication Critical patent/US20070166245A1/en
Abandoned legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/08Beam switching arrangements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K8/00Cosmetics or similar toilet preparations
    • A61K8/02Cosmetics or similar toilet preparations characterised by special physical form
    • A61K8/04Dispersions; Emulsions
    • A61K8/046Aerosols; Foams
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K8/00Cosmetics or similar toilet preparations
    • A61K8/18Cosmetics or similar toilet preparations characterised by the composition
    • A61K8/19Cosmetics or similar toilet preparations characterised by the composition containing inorganic ingredients
    • A61K8/25Silicon; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K8/00Cosmetics or similar toilet preparations
    • A61K8/18Cosmetics or similar toilet preparations characterised by the composition
    • A61K8/19Cosmetics or similar toilet preparations characterised by the composition containing inorganic ingredients
    • A61K8/26Aluminium; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
    • A61K8/00Cosmetics or similar toilet preparations
    • A61K8/18Cosmetics or similar toilet preparations characterised by the composition
    • A61K8/30Cosmetics or similar toilet preparations characterised by the composition containing organic compounds
    • A61K8/40Cosmetics or similar toilet preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/44Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILET PREPARATIONS
    • A61Q11/00Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/021Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using plane or convex mirrors, parallel phase plates, or particular reflectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0232Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using shutters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02Details
    • G01J3/0291Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28Investigating the spectrum
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274Calibration, base line adjustment, drift correction
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry

Abstract

Propellant free foamable aqueous dentifrice system which is capable of being delivered as a foam to a toothbrush and which is stable on the brush and when placed in the mouth and used for tooth cleaning, continues to generate more foam. The system is liquid and as such can not be used without being foamed because it is so thin that it falls beneath the bristles of the toothbrush.

Description

    RELATED APPLICATIONS
  • This application claims priority of provisional application 60/74043 filed Nov. 29, 2005
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • Propellant free foamable aqueous dentifrice system.
  • 2. Prior Art
  • The desirability of a foamable toothpaste is discussed at length in Fischer et al. U.S. Pat. No. 6,139,820. This patent discusses at length the advantage of the system with respect to prevention of fluoridosis in children because of the administration and ingestion of excess fluoride. Unfortunately children also have the mischievous habit of ejecting the content of pressurized foam containers in inappropriate locations. The present invention, by requiring a fresh pump stroke per ejection, avoids this and concomitant problems of the prior art.
  • SUMMARY OF THE INVENTION
  • The propellant free foamable aqueous dentifrice system of the present invention is capable of being delivered as a foam to a toothbrush and is stable on the brush and when placed in the mouth and used for tooth cleaning, continues to generate more foam. The dentifrice suspension itself is liquid and as such can not be used without being foamed because it is so thin that it falls beneath the bristles of the toothbrush.
  • There is provided a novel water based dentifrice suspension which is unusable on a toothbrush in an unfoamed state consisting essentially of
  • negatively charged fumed Silica, positively charged fumed Aluminum Oxide, hydrated Silica abrasive and an anionic surfactant wherein said surfactant is other than Sodium Lauryl Sulfate, Sodium Lauryl Sulfoacetate an Acylglutamate or a Betaine, this suspension is readily foamable from a non-propellant pump spray container from which the thus produced foam is usable on a toothbrush in its foamed state as a dentifrice.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • It is preferred to provide a secondary surfactant selected from the group consisting of nonionic solid block polymer surfactants. It is further desirable to include one or more of the following components an anti settling agent, a humectant as well as other usual components found in tooth pastes such as flavorants and anti cavity agents such as sodium fluoride. The composition however should not be considered as limited to the components recited.
  • It is particularly desirable that the composition contain from about 50 to about 85%, suitably about 60-about 65% by weight of water.
  • A foaming agent is added to the aqueous system so as to generate the initial foam and also the subsequent foam as the teeth are brushed. This can be used as such or can be augmented by the use of a secondary surfactant to aid in mouth feel and foam density.
  • We have found that the use of surfactants is very critical to the stability of the system. We have identified one anionic surfactant as particularly workable, that being Sodium Lauroyl Sarcosinate as the primary foamer or surfactant, used from about 1-about 3% by weight suitably at about preferably about 1.25-about 1.50%. We have found that Sodium Lauryl Sulfate, Sodium Lauryl Sulfoacetate, Acylglutamates and Betaines interfere with the formation of the anionic/cationic complex formed by the fumed Silica and fumed Aluminum Oxide. As a result, upon extended storage, a formulation utilizing one of these surfactants forms a gelatinous mass and is unstable.
  • From about 1 to about 3% by weight of fumed silica, suitably about 2% and from about 1 to about 3% by weight of fumed aluminum oxide, again suitably about 2%, are preferably used, it being especially desirable that the fumed components be provided in equal amounts.
  • As abrasive, from about 1 to about 10% suitably from about 3-about 6%, by weight of hydrated silica, suitably amorphous synthetic precipitated silica of about 10-about 15 microns diameter, is preferably used. The hardness of the abrasive selected will depend on proposed usage, thus Degussa Sident® grade 8 (low hardness) composition is used for a children's dentifrice while Sident® grade 10 (high hardness) is used for adults.
  • Where a secondary surfactant is desirable it is useful to employ from about 1-about 4% by weight, of nonionic solid block polymer surfactants suitably Poloximer 407®.
  • The use of additional components in the system have been found useful, there include a concentration of about 0.1-about 2.0%, preferably about 0.2-about 1.0% of an anti settling agent such as an inorganic colloidal Magnesium Aluminum Silicate, humectant materials such as sorbitol or glycerin, suitably at concentrations of about 20-about 25% by weight of the entire composition are employed.
  • The system can contain a fluoride such as Sodium Fluoride in amounts of about 0.243% based on the total weight of the system.
  • The system can also contain sweeteners flavors, colorants, preservatives, medicaments, desensitizers such as various nitrate systems, anti-tartar materials, etc.
  • According to the present invention, the stable foam of the present invention is produced using a propellantless mechanical pump. Such a pump precisely mixes water and air upon actuation to produce a foam. While it may be possible to use a conventional mechanical foam dispenser, such as a squeeze bottle foamer, the best results have been achieved with the finger activated pump foamer.
  • Preferably the foam is produced using the F-2 Finger Pump Foamer™, manufactured by Air Spray International, Inc. of Pompano Beach, Fla. Such a spring loaded valve system operates without the use of gas propellants or the like. Upon actuation, precise amounts of air and liquid are mixed and a foam capable of maintaining its structure for a substantial length of time is dispensed. In addition, the dispenser can deliver a variable amount of foam so as to just fit a variable size of toothbrush.
  • The F-2 Finger Pump Foamer™ is similar in design and operation to conventional propellant less finger actuated mechanical pump foamers such as described in U.S. Pat. No. 5,443,569 issued on Aug. 22, 1995 and U.S. Pat. No. 5,813,576 issued Sep. 29, 1998, the disclosure of which are incorporated by reference herein. Such propellantless finger actuated mechanical foamers can be employed to dispense the stable dentifrice foam of the present invention.
  • The F-2 Finger Pump Foamer™ is an easy to use dispenser with excellent performance and provides a clean single stroke action, zero VOC formulations and high quality. Shaking the container will not affect the foam quality. Precise dosage per stroke is possible and the container is refillable
  • EXAMPLES Example 1
  • Propellant free foamable toothpaste % 1. Fumed Silicon Dioxide (Aerosil 200 ®, Degussa) 2.000 2. Fumed Aluminum Oxide (Alum C ®, Degussa) 2.000 3. Amorphous Synthetic ppt. Silica (Sident ®, Degussa) 6.000 4. Sorbo Solution (70% Active) 12.500 5. Glycerin 12.500 6. Sodium Saccharin 0.100 7. Sodium Fluoride 0.243 8. Sodium Lauroyl Sarcosinate, 30% Active 4.000 (Hamposyl L-30 ®) 9. Poloxamer 407 ® (BASF Corp.) 2.000 10. Methyl Paraben 0.200 11. Propyl Paraben 0.050 12. Colloidal Magnesium Aluminum Silicate 0.400 (Veegum ® Regular) 13. Deionized Water 58.007 100.000

    Procedure:
    In a tank, add water, Sorbo solution and Glycerin. Stir well.
    With high speed stirring, add the fumed Silicon Dioxide and fumed AluminumOxide C followed by the Sident abrasive. Mix well with high speed stirring and/or in tank homogenizer. Mix until smooth and uniform.
    Add the Sodium Saccharin and Sodium Fluoride and continue mixing.
    Add the Methyl and Propyl Parabens and continue mixing.
    Add the Veegum Regular to the batch and mix until the batch is uniform.
    Slow the mixing speed and add the Sodium Lauroyl Sarcosinate to the batch.
    Avoid entrapping air in the batch.
    Start heating the batch. Keep the mixing speed slow to avoid entrapping air.
    When the temperature of the batch rises to 50 C slowly add the Poloxamer 407. Continue heating the batch to 70 C. The Poloxamer 407 should be completely dissolved in the batch. Start cooling the batch to room temperature. Add the flavor at 40° C.
    Submit the batch for packaging in the F-2 Finger Pump Foamer™ manufactured by Air Spray Int., Inc. of Pompano Beach, Fla.
  • Example 2
  • Propellant free foamable toothpaste % 1. Fumed Silicon Dioxide (Aerosil 200 ®, Degussa) 2.000 2. Fumed Aluminum Oxide (Alum C ®, Degussa) 2.000 3. Amorphous Synthetic ppt. Silica (Sident ®, Degussa) 6.000 4. Sorbo Solution (70% Active) 12.500 5. Glycerin 12.500 6. Sodium Saccharin 0.100 7. Sodium Fluoride 0.243 8. Sodium Lauroyl Sarcosinate, 30% Active 4.000 (Hamposyl L-30 ®) 9. Methyl Paraben 0.200 10. Propyl Paraben 0.050 11. Colloidal Magnesium Aluminum Silicate 0.400 (Veegum ® Regular) 12. Deionized Water 60.007 100.000

    Procedure:
    In a tank, add water, Sorbo solution and Glycerin. Stir well.
    With high speed stirring, add the fumed Silicon Dioxide and fumed AluminumOxide C followed by the Sident abrasive. Mix well with high speed stirring and/or in tank homogenizer. Mix until smooth and uniform.
    Add the Sodium Saccharin and Sodium Fluoride and continue mixing.
    Add the Methyl and Propyl Parabens and continue mixing.
    Add the Veegum Regular to the batch and mix until the batch is uniform.
    Slow the mixing speed and add the Sodium Lauroyl Sarcosinate to the batch.
    Avoid entrapping air in the batch. Add the flavor.
    Submit the batch for packaging in the F-2 Finger Pump Foamer™ manufactured by Air Spray Int., Inc. of Pompano Beach, Fla.

Claims (21)

1. A water based dentifrice suspension which is unusable on a toothbrush in an unfoamed state consisting essentially of
negatively charged fumed Silica,
positively charged fumed Aluminum Oxide,
hydrated Silica abrasive and
an anionic surfactant wherein said surfactant is other than Sodium Lauryl Sulfate, Sodium Lauryl Sulfoacetate an Acylglutamate or a Betaine,
said suspension being readily foamable from a non-propellant pump spray container wherein the thus produced foam is usable on a toothbrush in its foamed state as a dentifrice.
2. The suspension of claim 1 wherein the anionic surfactant is Sodium Lauroyl Sarcosinate.
3. The suspension of claim 1 additionally comprising a secondary surfactant selected from the group consisting of nonionic solid block polymer surfactants.
4. The suspension of claim 2 additionally comprising a secondary surfactant selected from the group consisting of nonionic solid block polymer surfactants.
5. The suspension of claim 4 wherein the secondary surfactant is Poloxamer 407®
6. The suspension of claim 3 additionally comprising an anti settling agent
7. The suspension of claim 6 wherein the anti settling agent is an inorganic colloidal Magnesium Aluminum Silicate.
8. The suspension of claim 3 additionally comprising a humectant.
9. The suspension of claim 6 additionally comprising a humectant.
10. The suspension of claim 8 wherein the humectant is selected from the group consisting of Sorbitol and Glycerin
11. The suspension of claim 1 comprising
from about 50 to about 85% by weight of water,
from about 1 to about 3% by weight of primary surfactant,
from about 1 to about 3% by weight of fumed silica,
from about 1 to about 3% by weight of fumed aluminum oxide,
from about 1 to about 10% by weight of hydrated silica.
12. The suspension of claim 11 additionally comprising from about 1 to about 4% by weight secondary surfactant.
13. The suspension of claim 12 wherein the size range of the hydrated silica is from about 10 to about 15 microns.
14. The suspension of claim 11 comprising from about 0.1 to about 2% by weight of anti settling agent.
15. The suspension of claim 11 comprising from about 20 to about 30% by weight of humectant.
16. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 1 and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
17. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 2
and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
18. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 4
and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
19. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 13
and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
20. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 14
and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
21. A foamed dentifrice delivery system consisting essentially of
a water based dentifrice suspension of claim 15
and
a non-propellant pump spray dispenser comprising a container and pump activated foam dispensing means there from, that can readily foam the suspension such that it is usable on a toothbrush in its foamed state.
US11/584,939 2005-11-28 2006-10-23 Propellant free foamable toothpaste composition Abandoned US20070166245A1 (en)

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US74004305P true 2005-11-28 2005-11-28
US11/584,939 US20070166245A1 (en) 2005-11-28 2006-10-23 Propellant free foamable toothpaste composition

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US12/094,469 Active 2028-02-21 US8049881B2 (en) 2005-11-28 2006-11-27 Optical analysis system and methods for operating multivariate optical elements in a normal incidence orientation

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US20090073433A1 (en) 2009-03-19

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