Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1998-11-30
2001-03-27
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S078030
Reexamination Certificate
active
06207174
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composite powder and a composition containing this composite powder. More specifically, the present invention relates to a composite powder which can give a desired color by light interference and a coloring composition comprising the same.
2. Description of Related Art
A color is a quite important element which can give us a physiological influence or a psychological influence. Actually, a color conditioning technology which creates a safe efficient working environment or a healthy comfortable living environment using a physiological or psychological effect that a color can give us has been used in various fields.
Usually, when a product is colored, various color pigments are employed. The color pigments are those for applying a fixed color to a product utilizing a phenomenon of light absorption or scattering.
However, it is difficult to meet various requirements for colors these days with only the color pigments.
Accordingly, a pearlescent pigment such as titanium dioxide-coated mica or the like, which is a pigment with the use of a phenomenon of light interference, is provided in addition to the above-mentioned color pigments. The great characteristic feature of the pearlescent pigment is that a “flip-flop effect” by which a color is delicately changed according to an angle can be imparted to a product obtained by using the same.
This pearlescent pigment has currently been used in various fields such as cosmetics and the like.
However, pearlescent pigments which are currently used are not necessarily free from defects.
For example, with respect to an ordinary pearlescent pigment which is used as a pigment of an external composition such as cosmetics or the like, various approaches have been attempted on the color. However, particles thereof are laminar or flaky, and cosmetics containing the same lack smoothness. Thus, the pearlescent pigment is problematic in the use. Further, since a gloss of the ordinary pearlescent pigment is generally quite strong, it is unavoidable that the amount thereof in cosmetics tends to be limited.
In one aspect, the problems attendant on the use and the excessive gloss can be solved by making the particles of the pearlescent pigment spherical. However, since the spherical particles have a great light scattering property, it is quite difficult to create a color by interference.
The problem to be solved by the present invention is to provide a novel composite powder which does not have the defects of such a conventional pearlescent pigment and by which a color can be created by interference, and to provide means for using the powder in various fields.
SUMMARY OF THE INVENTION
The present inventor has assiduously conducted investigations to solve this problem, and have consequently solved the problem by providing a composite powder comprising a core particle which is spherical and a coating component coated the surface of the core particle, having a specific relationship between the core particle and the coating component, and by using the composite powder, the particles of which have a uniform particle diameter.
That is, the present inventors provide the following inventions in the present application.
The present invention first provides a composite powder comprising a core particle which is spherical and has a refractive index of from 1.40 to 1.60, and a coating component which is coated on the surface of the core particle in film form and has a refractive index of from 2.00 to 2.90.
Further, the present invention provides the above-mentioned composite powder wherein the coating component coated on the surface of the spherical particle in film form has an optical film thickness between 190 and 780 nm.
Still further, the present invention provides the above-mentioned composite powder wherein the core particle is silicon dioxide, and the coating component is titanium dioxide.
Furthermore, the present invention provides a method of use of the above-mentioned composite powder wherein the composite powder, the particles of which have a uniform particle diameter, is coated on a coating surface to form a composite powder layer on the coating surface, and light interference is caused in the composite powder layer whereby the composite powder layer exhibits a color on the coated surface.
Moreover, the present invention provides a “coloring composition” containing the above-mentioned composite powder, the particles of which have a uniform particle diameter, as a coloring component. This “coloring composition” includes various compositions, for example, an external composition such as makeup products or the like, a paint composition, a printing ink composition and a sticky composition.
Still moreover, the present invention provides a method of use of the coloring composition wherein the coloring composition is coated on a coating surface to form a composite powder layer on the coating surface and light interference is caused in the composite powder layer whereby the composite powder layer exhibits a color on the coating surface.
That is, the present invention provides a multi-purpose composite powder which can be used in various fields owing to the interference color, and a coloring composition for coloring an object using the interference color of this composite powder. This coloring composition can include the various types of composition, for example, an external composition such as makeup products or the like, a paint composition, a printing ink composition, a sticky composition and the like.
Further, the present invention provides a method of use of the composite powder or the coloring composition for most exhibiting the function of the above-mentioned composite powder or coloring composition.
REFERENCES:
patent: 5122418 (1992-06-01), Nakane et al.
patent: 5165915 (1992-11-01), Tokubo et al.
patent: 5182103 (1993-01-01), Nakane et al.
patent: 5714526 (1998-02-01), Whyzmuzis
patent: 5856377 (1999-01-01), Sato et al.
patent: 0913432A (1999-05-01), None
Database WPI, Mar. 26, 1998, Abstract & WO 98 11865 A.
Database WPI, Jun. 18, 1998, Abstract & WO 98 26011A.
Patent Abstracts of Japan, Mar. 3, 1998, vol. 1998, No. 08, Abstract.
Japanese Patent Publication (Laid-Open) No.: 61-57653, Publication Date, Mar. 24, 1986.
Japanese Patent Application No. 59-180146, Filing Date, Aug. 28, 1984 and Partial Translation.
Hineno Teruhiko
Kimura Asa
Howard S.
Page Thurman K.
Shiseido Company Ltd.
Townsend & Banta
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