Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1997-06-06
1999-09-07
Venkat, Jyothsna
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
424 69, 424 7802, 514844, A61K 748
Patent
active
059484179
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a solid cosmetic composition which contains a powder with high oil absorbency and can suppress oil shining and the like.
CONVENTIONAL TECHNOLOGY
It has been considered that one reason of wear-off of make-up such as oil shining is due to generation of sebum at the T-zone. It is thought that wear-off of make-up such as oil shining is caused by generation of sebum from the skin over time after cosmetic composition is applied, which sebum adds to the non-volatile oil contained in the cosmetic composition, resulting in overly wetting the powder of the cosmetic composition.
Japanese Patent Laid-open H4-117315 and H4-187612 disclose cosmetic compositions which can prevent wear-off of make-up, comprising oil absorbing powders such as polymer beads.
OBJECT OF THE INVENTION
However, these cosmetic compositions could not provide sufficient suppression of oil shining, and also could not provide a natural finished appearance.
The object of the present invention is to provide a cosmetic composition which can suppress oil shining without affecting a natural finished appearance, and can also provide moisturizing effect to non-aqueous cosmetic compositions as necessary.
DETAIL DESCRIPTION OF THE INVENTION
The cosmetic composition of the first aspect of the present invention is characterized in comprising 0.1-10 wt % to the entire composition spherical silica having an average particle size of 3-16 .mu.m wherein said spherical silica is adsorped with moisturizing agent.
The cosmetic composition of the second aspect of the present invention is characterized in comprising (1) 40-99 wt % of a powder component and (2) 0.1-60 wt % of a binder base; said (1) powder component further comprises (a) a spherical silica having an average particle size of 3-16 .mu.m and (b) an agglomerate having a particle size of 100-2000 .mu.m made of primary particles of spherical acrylate cross-linked copolymer having an average particle size of no more than 1 .mu.m; wherein said (a) spherical silica and said (b) spherical acrylate cross-linked-copolymer agglomerate is comprised at a weight ratio (a:b) of 1:9-9:1, and the total of said (a) spherical silica and said (b) spherical acrylate cross-linked-copolymer agglomerate is 0.1-10 wt % to the entire composition.
Hereinafter, common components of the first and second aspects of the present invention will be described collectively as the "present invention".
The spherical silica used in the present invention is preferably a "Silicic Anhydride" as specified in The Japanese Standards of Cosmetic Ingredients. Those which have a spherical shape are used as they have good lubricating properties.
The spherical silica used in the present invention has an average particle size of 3-16 .mu.m. If the particle size is too small, the oil absorbency will be too high that more than necessary oil is absorbed and dryness is caused. Lubricity will also deteriorate, and undesirable pulling feeling will increase.
If the particle size is too large, the oil absorbency will be too low that not enough oil can be absorbed. Also unevenness of color would appear and molding becomes difficult.
The spherical silica used in the present invention is preferably a spherical porous silica having an oil absorbency of about 60-500 ml/100 g.
In the first aspect of the present invention, said spherical silica adsorped with moisturizing agent is comprised at a level of 0.1-10 wt % to the entire composition. The amount of moisturizing agent adsorped is preferably no more than the weight of the spherical silica. At this level, good adsorption of the moisturizing agent as well as good oil absorbency can be obtained.
The spherical silica adsorped with moisturizing agent is comprised at an amount of 0.1-10 wt % of the entire composition. If the amount is too small, sufficient oil absorbency and oil shining suppression cannot be obtained, and if the amount is too large, dryness and unevenness of color appears.
In the second aspect of the present invention, spherical silica and spheric
REFERENCES:
patent: 5688831 (1997-11-01), El-Nokaly et al.
Allen George W.
Henderson Loretta J.
Suter David L.
The Proctor & Gamble Company
Venkat Jyothsna
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