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A personal care composition

A personal care and composition technology, which is applied in skin care preparations, pharmaceutical formulations, cosmetic preparations, etc., and can solve the problems of non-disclosure and the like

Inactive Publication Date: 2013-04-17
UNILEVER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the use of inorganic pigments and dyes is generally mentioned in the publications cited above, none of them disclose specific size selective inorganic pigments that will have specific light scattering properties (reflecting incident light mainly in the red region) The particles are combined with selected organic dyes with specific light-absorbing properties (absorbing incident light mainly in the blue region) to provide a highly desirable even skin appearance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0047] Examples 1-3: Reflectance (measure of skin appearance) provided by a composition according to the invention (Example 1) compared to non-inventive examples (Examples 2 and 3)

[0048] The following compositions (shown in Table 1) were prepared.

[0049] Table 1

[0050] .

[0051] *The particles used are titanium dioxide with a particle size of 0.4-0.8 microns. Such particles scatter about 64% of the light in the wavelength range of 550-700nm relative to the total scattering in the range of 400-700nm.

[0052] **The dye used is Chocolate Brown TAS, which absorbs approximately 90% of the light in the 400-550nm wavelength range relative to the total absorption in the 400-700nm range.

[0053] The reflectance of the various Examples 1-3 was measured using the following procedure:

[0054] Reflectance measurement: the measured amount (2mg / cm 2 ) is applied to a skin-like substrate. The substrate is a 3M transpore tape (L* of 57.7, a* of 5.2 and b* of 9.5) glued to kr...

Embodiment 4-6

[0060] Examples 4-6: Use of particles with dimensions within and outside the present invention

[0061]Compositions similar to Example 1 were prepared except that the particle size in each composition was different.

[0062] Example 4 is similar to Example 1, the particles used being titanium oxide with a particle size of 0.4-0.8 microns. The particle size of the titanium dioxide used in Example 5 was 0.01-0.25 microns. The particle size of the titanium dioxide used in Example 6 was 1-5 microns. The reflectance of the compositions of Examples 4-6 was measured using the procedure described in Examples 1-3 and the data are summarized in Table 3.

[0063] table 3

[0064] %Reflectivity background Example 4 Example 5 Example 6 410nm 15.8 16.2 12.0 13.6 450nm 16.2 16.6 12.6 14.0 500nm 17.9 21.6 15.9 18.3 550nm 19.0 25.9 18.7 22.3 600nm 21.8 31.1 23.1 27.8 650nm 31.2 36.9 31.1 34.5 700nm 46.2 53.0 47.6...

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Abstract

The invention relates to personal care compositions for improved skin appearance especially for dark skinned consumers. The personal care composition of the present invention comprises a selective combination of an inorganic pigment particle that has a specific light scattering property (reflection of incident light predominantly in the red region) and an organic dye that has a specific light absorption property (absorption of incident light predominantly in the blue region). This selective combination provides for the highly pleasing even skin appearance.

Description

technical field [0001] The present invention relates to personal care compositions for improving the appearance of the skin, particularly of consumers with dark skin. Background technique [0002] People all over the world desire healthy skin that not only looks youthful, but also has a pleasing, even-toned appearance. One way they accomplish this is by ensuring minimal damage to the skin by protecting it against harsh environmental conditions such as heat, humidity, sunlight, pollution and dust. In addition to protecting the skin, consumers also prefer to use cosmetics to minimize the appearance of unevenness on the skin. In tropical countries (where people generally have dark skin) there is a desire to have a lighter skin appearance. People living far from the tropics, such as Caucasians, who typically have light skin, prefer their skin to have an even tanned tone. Any exposure of their skin to sunlight often results in blotchy skin called freckles, and in some cases th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/29A61K8/40A61Q17/04A61Q19/00A61Q19/02A61K8/27A61K8/02
CPCA61K8/0241A61K8/27A61K8/29A61K2800/412A61K2800/43A61K2800/437A61Q1/02A61Q17/04A61Q19/02A61K8/0245
Inventor R.拉贾戈帕尔A.罗伊
Owner UNILEVER NV