Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-12-28
2004-03-09
Travers, Russell (Department: 1617)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S400000, C424S070120, C424S070130, C424S070121
Reexamination Certificate
active
06703027
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an external composition, more specifically it relates to an external composition capable of covering and smoothing roughness on a skin due to various reasons, whereby it appear visually as if there were no roughness.
BACKGROUND ART
One of the most important roles for makeup cosmetics is needless to say “beautification” or making the appearance more beautiful. Specifically, this “beautification” is normally achieved by smoothing roughness caused by small pores in the skin and correcting the color of the skin.
However, it is true that there is quite a bit of skin roughness which is difficult to correct even using conventional makeup cosmetics.
For example, (1) skin roughness which has become noticeable to an extent forming “craters” due to acne etc. and (2) keratoids due to burns or skin grafts, (3) surgical scars, (4) deep wrinkles, (5) deep scars, (6) large pores or small wrinkles, etc. are difficult to correct by makeup cosmetics.
That is, among makeup cosmetics, oily solid cosmetics containing powder components, oil components, and wax and emulsified solid cosmetics containing powder components, oil components, wax, water, and a humectant bury the roughness, etc. caused by small pores in the skin by the wax contained therein, but these are flexed by the movement of the skin and sometimes end up falling off so cannot correct large roughness of the skin such as in the above (1) to (5). Further, in conventional makeup cosmetics, since the refractive indexes of the components differ, the color applied becomes opaque and, as a result, pitting becomes opaque at the time of coating and bumps become highly transparent. Even if the roughness is flattened, the pitting ends up visually standing out, and therefore, the result is not practical.
Further, when trying to forcibly correct the large pores and small wrinkles of the above (6) by existing makeup cosmetics, there has been a strong tendency for an unnatural finish to result.
Therefore, there has been a desire to provide an external composition capable of smoothing large and small roughness on the skin, including roughness which had been difficult to correct by conventional makeup cosmetics as described above, and make the roughness no longer stand out visually.
When large roughness on the skin such as the above (1) to (5) is corrected, the external composition to be provided must adhere to the skin, without falling off etc. even when coated thickly on the skin, not run due to gravity, and be able to be easily removed from the skin. Further, preferably it should be high in transparency and be able to correct roughness to appear as if there were no pitting or bumps on the skin.
Further, when correcting the large pores and small wrinkles of the above (6), it is necessary that the composition adhere to the skin, without falling off etc. even if thickly coated on the skin and enable correction so that it appears if there are no pores or small wrinkles while maintaining a natural feeling and also retain this corrective effect over a long period of time (at least 2 hours or more).
The present inventors have already provided, as a means for solving part of this problem, a roughness correcting composition having these desired characteristics by formulating a high viscosity silicone oil having both suitable adhesion to and peelability from the skin and, to correct running on the skin due to the nature of this silicone oil as a Newtonian fluid, a powder component (see Japanese Patent Application No. 9-227603).
This roughness correcting composition solved part of the main problem above in that it adhered to the skin, without falling off even when coated thickly on the skin and did not run due to gravity and, at the same time, could be easily removed from the skin, was high in transparency, and enabled correction of roughness to make it seem if it were not there. When a long time passed from when it was coated on the skin, however, the portions entering into deeper portions of the skin ended up appearing white and broke up by movement of the skin after coating, and therefore, the last with the elapse of time (the adhesion of this composition) and toughness were not sufficient.
DISCLOSURE OF INVENTION
Accordingly, the object of the present invention is to provide an external composition superior in last (the adhesion of this composition) and toughness and capable of correcting of skin roughness etc.
In accordance with the present invention, there is provided an external composition containing a silicone-modified polysaccharide compound and a low viscosity silicone oil and/or powder component.
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the present inventors engaged in intensive studies to solve the above problem and, as a result, found that it is possible to obtain a desired external composition (hereinafter also referred to as the external composition of the present invention) by formulating a silicone-modified polysaccharide compound such as silicone-modified pullulan into the external composition as a component for correcting the skin roughness.
The external composition of the present invention contains a low viscosity silicone oil and/or powder component. As the powder component, inclusion of at least a powder component having a refractive index of 1.3 to 1.5 such as silicon dioxide powder, silicone resin powder, silicone rubber powder, and silicone resin coated rubber powder is preferable.
Further, in the external composition of the present invention, as explained below, the hardnesses or shapes etc. of the powder particles of the powder component formulated are suitably selected to be able to impart various properties.
Further, in the external composition of the present invention, as explained below, a volatile component such as volatile silicone or water is formulated so as to set the thickness of coating of the composition on the skin to a specific thickness for use in various modes.
The external composition of the present invention may be roughly divided into two types of aspects of external compositions.
One external composition of the present invention is an external composition for correcting large roughness on the skin such as the above (1) to (5) and specifically is an external composition expressed mainly as a “roughness correcting composition” (the external composition of this aspect of the present invention sometimes also being called the roughness correcting composition of the present invention).
In the external composition of the present invention, the contents of the silicone-modified polysaccharide compound and the low viscosity silicone oil are preferably in total at least 70.0% by weight of the weight of the external composition as a whole minus the weight of the powder component (in the case where a volatile component is included in the external composition, the weight of the powder component and the volatile component). Further, at least 90.0% by weight of the powder component formulated as a whole is preferably a powder component having a refractive index of 1.3 to 1.5.
The other external composition of the present invention is an aspect of an external composition used as a general makeup cosmetic composition, but is a “makeup composition” capable of covering large pores or small wrinkles (above (6)), which had been difficult to naturally cover in the past, while maintaining a natural look (the external composition of this aspect of the present invention also being called the makeup composition of the present invention).
In the makeup composition of the present invention, the total content of the silicone-modified polysaccharide compound and the low viscosity silicone oil in the external composition is preferably at least 60.0% by weight of the weight of the external composition as a whole minus the weights of the powder component and the volatile component. Further, at least 20.0% by weight of the powder component formulated as a whole is preferably a powder component having a refractive index of 1.3 to 1.5.
The embodiments of the present invention will be explai
Fukui Hiroshi
Kurosawa Mari
Foley & Lardner
Sharareh Shahnam
Shiseido Company Ltd.
Travers Russell
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