Whitening dentifrice compositions with zinc core shell silica particles

A technology of silica and composition, which is applied in medical preparations containing active ingredients, cosmetic preparations, dentistry, etc., and can solve problems such as difficult deposition of dyes

Inactive Publication Date: 2019-08-06
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because dyes are much more water soluble than pigments, it is more difficult for dyes to deposit on the teeth and remain in the hydrated environment of the mouth

Method used

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  • Whitening dentifrice compositions with zinc core shell silica particles
  • Whitening dentifrice compositions with zinc core shell silica particles
  • Whitening dentifrice compositions with zinc core shell silica particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0148] Wherein the whitening dentifrice composition is free of peroxide whitening agents and oxidizing agents. Other implementations are as follows:

[0149] [2] The use according to embodiment 1, wherein zinc ions are present in an amount of 0.01% by weight to 1% by weight based on the total amount of the whitening dentifrice composition.

[0150] [3] The use according to embodiment 1 or 2, wherein the surface of the silica core of the Zn-CSS particle contains 0.1% by weight to 10% by weight of metal silicate based on the total amount of the whitening dentifrice composition .

[0151] [4] The use according to embodiment 1, 2 or 3, wherein the surface of the silica core of the Zn-CSS particle is represented by the following formula:

[0152]

[0153] Wherein O* is oxygen in the form of silicate; M is a monovalent metal ion; Zn is a divalent zinc ion; p, o, n, m, h and q are the atomic percentages of each component; The total charge of the silicon oxide particles is zero....

Embodiment 1

[0179] Example 1: Whitening Efficacy of Non-Aqueous Compositions Containing Blue Dye as Blue Colorant

[0180] The efficacy of a non-aqueous composition comprising a blue dye as a blue colorant and comprising zinc core-shell silica was first tested in a simple solution, as shown in Table 1 below.

[0181] The sample labeled "Dye Control" is a solution containing 0.05% by weight blue dye FD&C #1 in glycerol. The dye control solution did not contain any form of zinc or core-shell silica.

[0182] The comparative example labeled "Dye and CSS" is a solution containing 0.05% by weight blue dye FD&C #1 and 10% by weight core-shell silica in glycerol.

[0183] The example labeled "Dye and Zn-CSS" is a solution containing 0.05% by weight blue dye FD&C #1 and 10% by weight zinc core-shell silica in glycerol.

[0184] These formulations were evaluated for retention of blue dye from solution onto teeth. The root of a human third molar is removed and the tooth is bisected from crown ...

Embodiment 2

[0194] Example 2: Whitening Efficacy of Non-Aqueous Compositions Containing Blue Pigment as Blue Colorant

[0195] The efficacy of a non-aqueous composition comprising a blue dye as a blue colorant and comprising zinc core-shell silica was first tested in a simple solution using the procedure as described in Example 1, except that a blue pigment was used instead of blue. color dye. The results are summarized in Table 2 below.

[0196] The sample labeled "Pigment Control" was a solution containing 0.05% blue pigment in glycerol. The pigment control solution did not contain any form of zinc or core shell silica.

[0197] The example labeled "Pigment and Zn-CSS" is a solution containing 0.05 wt% Blue Pigment #15 and 10 wt% zinc core-shell silica in glycerol.

[0198] Table 2

[0199]

[0200]The above experiments show that Zn-CSS is more effective than a solution of the pigment in glycerol in delivering and retaining the blue pigment in teeth to increase tooth whitening....

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Abstract

A whitening dentifrice composition, free from peroxide whitening agents, includes a blue coloring agent, a zinc core shell silica (Zn-CSS) particle, and an orally acceptable vehicle including a non-aqueous solvent and water. The blue coloring agent includes at least one of a blue pigment and a blue dye and has a blue to blue-violet color with a hue angle in the CIELAB system ranging from 200 degrees to 320 degrees. The Zn-CSS particle includes a silica core, and a surface of the silica core etched with a metal silicate, which is a silicate of zinc ion and optionally a monovalent metal ion.

Description

Background technique [0001] Natural gray or yellow teeth can be made to look whiter by using tooth whitening products. Typically, the whitening effect of commonly available tooth whitening products is achieved by chemically altering or removing stains such as by using peroxides and / or by altering the visual perception of tooth color. It is known in the literature that the visual perception of white matter can be altered by depositing optical brighteners or blue colorants onto the teeth. By depositing onto the teeth, blue colorants, such as blue pigments or blue dyes that reflect or emit light with a hue angle (CIELAB scale) between 200 and 320 degrees, are most helpful in bringing out the natural off-white or yellow Teeth look whiter. As disclosed in EP19353958A1, pigments have been combined with deposition aids such as (copolymer of maleic anhydride and methyl vinyl ether) are used together in toothpaste to make teeth look whiter. However, because dyes are much more wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/25A61K8/27A61K8/46A61K8/49A61Q11/00A61K8/02A61K8/19
CPCA61K8/466A61K8/494A61K8/19A61K2800/43A61K2800/621A61K2800/651A61K8/27A61Q11/00A61K8/0241A61K8/25A61K8/02A61K8/46A61K8/49A61K2800/30A61K2800/434
Inventor 阿格涅斯兹卡·科钦斯卡詹尼弗·格伦隆德哈勒娜·施特罗特曼苏曼·乔普拉
Owner COLGATE PALMOLIVE CO
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