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Abrasive coatings for compositions containing peroxides

A technology of peroxides and compositions, applied in the directions of medical preparations, cosmetic preparations, cosmetic preparations containing active ingredients, etc., can solve the problems of loss of whitening efficacy, decomposition of peroxides and loss of whitening efficacy, etc.

Active Publication Date: 2018-11-16
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] However, known whitening dentifrice compositions that include peroxides can exhibit unacceptable levels of peroxide decomposition and loss of whitening efficacy as a result of storage prior to sale or as a result of the user
[0003] Accordingly, there is a need for improved peroxide-containing whitening oral care compositions, such as dentifrice compositions, which exhibit improved cosmetic stability of peroxides and are thus chemically stable for long-term storage and suitable for daily consumption or use without significant loss of whitening efficacy

Method used

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  • Abrasive coatings for compositions containing peroxides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] A dentifrice was prepared according to Example 1, the composition of which is also specified in Table 1.

[0111] The dentifrice of Example 1 comprised the same composition as the dentifrice of Example 1, except that in Example 1 the abrasive comprised calcined alumina previously coated with stearic acid.

[0112] Again, the stability of hydrogen peroxide in the dentifrice of Example 1 was evaluated using the same two test protocols as described in Comparative Example 1 above.

[0113] In the first test protocol for evaluating the chemical stability of hydrogen peroxide in dentifrices, again, the same type of conventional flexible polymer toothpaste tube was filled with 125 g of the dentifrice of Example 1, and The tubes are closed with conventional closures.

[0114] Again, images were taken the day after the dentifrice preparation (as a baseline measurement), after three days of accelerated aging at 55°C, and after seven days of accelerated aging at 55°C. The result...

Embodiment 2

[0121] Example 1 demonstrates that prior coating of small particle calcined alumina with stearic acid improves peroxide stability in non-aqueous dentifrice formulations compared to the addition of uncoated alumina.

[0122] In Examples 2 and 3 and Comparative Example 2, additional laboratory experiments were performed to demonstrate that the coating material must be compatible with hydrogen peroxide.

[0123] Like Example 1, Example 2 tests stearic acid, which is a saturated fatty acid consisting of an 18-carbon chain attached to a carboxylic acid group.

[0124] To evaluate the performance of another fatty acid coating material, Example 3 tested oleic acid, which is a monounsaturated fatty acid consisting of an 18-carbon chain attached to a carboxylic acid group.

[0125] For comparison, Comparative Example 2 tests another polymer which can also be attached to the surface of the alumina particles via carboxylic acid functional groups, in particular a PVM / MA copolymer sold und...

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Abstract

Described herein are oral care compositions comprising (i) a peroxide whitening agent and (ii) an abrasive in the form of granules, wherein the granules have been previously coated with a coating comprising a coating material, the The coating material is selected from at least one substantially saturated C12-C30 fatty acid, at least one monosaturated C12-C30 fatty acid and at least one silicone polymer, or any mixture of two or more thereof.

Description

Background of the invention [0001] Dentifrice formulations containing peroxides are known and useful for cleaning and whitening teeth. Peroxides bleach teeth, remove stains and kill cariogenic bacteria. However, peroxide compounds are highly reactive and therefore difficult to formulate. In addition, hydrogen peroxide can spontaneously decompose to form oxygen (O 2 ) and water, so that on storage, the dentifrice container can swell, explode, or leak, and the remaining formulation will not have enough peroxide remaining to effectively clean and whiten teeth. Some initially contain very high levels of peroxide which break down over time such that the exact amount of peroxide delivered upon application is variable and depends largely on how long and under what conditions the dentifrice has been stored store. [0002] However, known whitening dentifrice compositions that include peroxides can exhibit unacceptable levels of peroxide decomposition and loss of whitening efficacy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/26A61K8/36A61Q11/00A61K8/81A61K8/02A61K8/22A61K8/891
CPCA61K8/0241A61K8/0245A61K8/22A61K8/26A61K8/361A61K8/8176A61K8/891A61Q11/00A61K2800/651A61K2800/624A61K2800/622A61K2800/591A61K2800/412A61K2800/28A61K8/36A61K8/81A61Q11/02
Inventor V.P.马罗尼S.乔普拉P.曼达迪
Owner COLGATE PALMOLIVE CO