Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Patent
1995-06-05
1998-06-09
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
1062864, 106437, 252309, 2523131, 423612, 424 60, 424400, 424401, A61K 742, C01G 23047, C09C 136
Patent
active
057629137
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a highly sensitive photochromic compound oxide and a cosmetic comprising the photochromic compound oxide.
BACKGROUND ART
Attempts have been made at blending a photochromic titanium oxide or a photochromic titanium oxide containing a metal such as Fe, Cr, Al, Mn, Cu, Ni, W or V in a cosmetic such as foundation.
For example, a photochromic composition capable of regulating color rendering properties which contains a member selected from among the above photochromic titanium oxides is described in International Publication WO 89/12084.
Japanese Patent Laid-open Publication No. 3(1991)-173810 describes photochromic flesh colored pigments each comprising a member selected from among the above photochromic titanium oxides. Japanese Patent Laid-open Publication No. 4(1992)-364117 describes photochromic ultraviolet ray shield powders each comprising a member selected from among the above photochromic titanium oxides.
For use in a cosmetic of flesh color as a basic tone, such as foundation, it is desired that: irradiation of light; undergo a tone change in accordance with a difference in light intensity between indoors and outdoors, i.e., a light intensity difference between the sunlight and the indoor light, so that the flesh color or color rendering can be held constant; and
From these viewpoints, a photochromic titanium oxide containing Fe is preferred and, especially, a photochromic titanium oxide containing only Fe as a photochromic flesh colored pigment has been brought into practical use. Incidentally, this photochromic titanium oxide containing only Fe is employed in all the Examples of the above-mentioned publications.
However, a cosmetic having, blended therein, this photochromic titanium oxide containing only Fe has a drawback in that, when a light quantity change instantaneously occurs as in taking a photographic picture with the use of flashlight, it cannot exhibit satisfactory changes in lightness and color difference in accordance with the above instantaneous light quantity change.
Thus, when photographed indoors with the use of flashlight, a woman's face made up with the cosmetic having, blended therein, the photochromic titanium oxide containing only Fe looks white and stands out in the photograph because of the delay of the color change of the titanium oxide.
The inventors have made extensive and intensive studies on the photochromic compound oxide containing Ti as a main component with a view toward overcoming the above drawback of the prior art. As a result, it has been found that a highly sensitive photochromic compound oxide which is unexpectable from the conventional photochromic compound oxide containing only Fe can be obtained by forming a compound oxide by adding not only Ti and Fe but also Si optionally together with Al, and that, when a woman's face made up with a cosmetic having this compound oxide blended therein is photographed in colors indoors with the use of flashlight, a color picture can be obtained in which the woman's face holds its natural flesh color. The present invention has been completed on the basis of the above findings.
OBJECT OF THE INVENTION
As apparent from the foregoing, the object of the present invention is to provide a photochromic compound oxide which, even when a light quantity change instantaneously occurs as in taking a photographic picture with the use of flashlight, exhibits satisfactory changes in lightness and color difference in accordance with the above instantaneous light quantity change, and also to provide a cosmetic comprising this photochromic compound oxide.
DISCLOSURE OF THE INVENTION
The photochromic compound oxide of the present invention is a compound oxide of Ti, Fe and Si which may contain Al. In particular, a photochromic compound oxide is preferred in which Fe is contained in an amount of 0.05 to 10% by weight in terms of Fe.sub.2 O.sub.3, Si is contained in an amount of 1 to 80% by weight in terms of SiO.sub.2, and Al is contained in an amount of 0 to 30% by weight in terms of Al
REFERENCES:
patent: 5176905 (1993-01-01), Ohno et al.
patent: 5403513 (1995-04-01), Sato et al.
Miyazaki Takumi
Nakao Akira
Tanaka Hirokazu
Catalysss & Chemicals Industries Co., Ltd.
Dodson Shelley A.
LandOfFree
Photochromic compound oxide and cosmetic comprising the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photochromic compound oxide and cosmetic comprising the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photochromic compound oxide and cosmetic comprising the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2195794