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CN-122005326-A - Oral care composition comprising gel network and potassium nitrate

CN122005326ACN 122005326 ACN122005326 ACN 122005326ACN-122005326-A

Abstract

The present invention relates to an oral care composition comprising a gel network and potassium nitrate. An oral care composition comprising a gel network phase, potassium nitrate, an abrasive and a fluoride ion source. The gel network phase comprises a fatty amphiphile and a second surfactant. The oral care composition comprises at least about 12% fatty amphiphiles and phase separation is not visually perceptible.

Inventors

  • S. Micha
  • L.E. Doran

Assignees

  • 宝洁公司

Dates

Publication Date
20260512
Application Date
20170331
Priority Date
20160401

Claims (5)

  1. 1. An oral care composition comprising a combination of at least one active ingredient, the oral care composition comprises: a. A gel network phase comprising a fatty amphiphile, wherein the fatty amphiphile is a fatty alcohol selected from the group consisting of cetyl alcohol, stearyl alcohol, and combinations thereof, and a second surfactant, wherein the second surfactant is sodium lauryl sulfate; b. 1% to 8%, preferably 5% by weight of the composition of potassium nitrate; c. from 9% to 16% by weight of the composition of an abrasive, wherein the abrasive comprises precipitated silica; d. A fluoride ion source selected from the group consisting of stannous fluoride, sodium fluoride, potassium fluoride, amine fluoride, sodium monofluorophosphate, indium fluoride, and combinations thereof; Wherein the oral care composition comprises at least 16% fatty amphiphile by weight of the composition; And wherein phase separation is not visually perceptible, as determined by the phase separation method, and the precipitated silica has a BET surface area of from 19m 2 /g to 55m 2 /g, and the fluoride ion source provides a fluoride ion concentration of from 0.005% to 2.0% by weight of the composition.
  2. 2. The composition according to any of the preceding claims, wherein the composition further comprises from 15% to 95%, preferably from 25% to 70%, more preferably from 30% to 50%, more preferably from 32% to 45% water by weight of the composition.
  3. 3. The composition according to any preceding claim, wherein the composition may comprise from 1% to 15%, preferably from 2% to 10%, more preferably from 4% to 8% by weight of the composition of a second surfactant.
  4. 4. The composition of any one of the preceding claims, wherein the composition comprises from 16% to 17% fatty amphiphile by weight of the composition.
  5. 5. The composition of any one of the preceding claims, wherein the fluoride ion source comprises sodium fluoride.

Description

Oral care composition comprising gel network and potassium nitrate The application is applied for 31 days of 2017, 3 months and application number isThe invention is a divisional application of the patent application entitled "oral care composition comprising gel network and potassium nitrate". Technical Field The present invention relates to oral care compositions. More specifically, a toothpaste composition comprising a gel network and potassium nitrate. Background Oral care compositions, including toothpaste compositions, may contain fluoride salts, abrasives, and flavoring agents to clean teeth, freshen breath, and maintain the aesthetics and health of the oral cavity, including teeth and gums. It is also desirable to include potassium nitrate (KNO 3) in the oral care composition to help reduce pain in sensitive teeth (dentinal hypersensitivity). Formulating toothpaste compositions with proper rheology can be very challenging. The composition must not be too thick so that it can be easily dispensed out of the tube, but is also thick enough to stand on the toothbrush without sinking into the bristles. The viscosity of the oral composition must remain stable over time without continuing to thicken, so the oral composition remains easily dispensed during the shelf life. Once dispensed from the container, the oral composition should not be so viscous or sticky that it will become soiled when used by the consumer. The oral composition must also be easily dispersible in the mouth and in the foam. It is also desirable that the oral composition not stick to the sink or leave a residue that is difficult to remove. In addition to balancing viscosity and shear thinning to formulate acceptable rheology, oral compositions must also be stable and useful for active ingredients including fluoride salts and potassium nitrate. One way to improve toothpaste rheology and stability is to include a gel network phase as a structuring agent. The gel network phase may comprise fatty amphiphiles, such as fatty alcohols and secondary surfactants. The inclusion of a gel network phase may also provide a unique brushing experience. For example, toothpastes comprising gel network phases may have excellent foaming, and the foam may not easily break during brushing, even when used with an electric toothbrush. In addition, some commercially available toothpastes can feel rough and can irritate the mouth of the user, however, toothpastes containing gel networks can feel smooth and are generally non-irritating. In addition, after brushing, the mouth not only feels fresh and clean, but the user's teeth may feel particularly smooth, and the smoothness may last for a whole day, because the amount of biofilm accumulated on the teeth during brushing may be significantly reduced. However, it is particularly difficult to formulate stable toothpaste compositions having a gel network phase that also contains an effective amount of a salt, such as KNO 3. For example, unacceptable phase separation was observed in toothpastes containing gel network phases and KNO 3. Thus, there is a need for improved oral care compositions having an effective amount of a salt such as KNO 3 and sufficient rheological properties, and wherein the phases are stable. Disclosure of Invention An oral care composition comprising (a) a gel network phase comprising at least about 14% fatty amphiphile and a second surfactant, (b) from about 1% to about 8% potassium nitrate by weight of the composition, (c) from about 2% to about 25% abrasive by weight of the composition, wherein the abrasive comprises precipitated silica, and (d) a fluoride ion source selected from the group consisting of stannous fluoride, sodium fluoride, potassium fluoride, amine fluoride, sodium monofluorophosphate, indium fluoride, amine fluoride, and combinations thereof, wherein the fluoride ion source provides a fluoride ion concentration of from about 0.005% to about 2.0% by weight of the composition, and wherein phase separation is not visually perceivable as determined by the phase separation method. An oral care composition comprising (a) a gel network phase comprising from about 14% to about 20% by weight of the composition of a fatty amphiphile and a second surfactant, (b) from about 1% to about 8% by weight of the composition of potassium nitrate, (c) from about 2% to about 25% by weight of the composition of an abrasive, (d) a fluoride ion source selected from the group consisting of stannous fluoride, sodium fluoride, potassium fluoride, amine fluoride, sodium monofluorophosphate, indium fluoride, amine fluoride, and combinations thereof, wherein the fluoride ion source provides a fluoride ion concentration of from about 0.005% to about 2.0% by weight of the composition, wherein phase separation is not visually perceptible as determined by the phase separation method. A process for preparing an oral care composition comprising the steps of (a) mixing water and a fatty amphiphile, (b) heating th