Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-03-02
2002-02-12
Kopec, Mark (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S417000, C510S466000
Reexamination Certificate
active
06346507
ABSTRACT:
RELATED APPLICATIONS
This application claims the priority of Japanese Patent Application No. 11-57281 filed on Mar. 4, 1999, which is incorporated herein by reference.
FIELD OF THE INVENTION
The present invention relates to a liquid crystal composition and a cosmetic preparation, and, in particular, to an improvement in usability of the cosmetic preparation and effect for removing makeup in case of using those as a make-up remover.
BACKGROUND OF THE INVENTION
Skin care creams, milky lotions, essences, massage creams and the like which aim at moisturizing skin comprise water-soluble and oil-soluble ingredients. A small amount of amphiphathic substances such as nonionic surfactants are used for the purpose of emulsifying these ingredients homogeneously. Make-up removers which aim at removing base makeup such as foundation or point makeup such as lipstick comprise oily ingredients for the purpose of dissolving and dispersing makeup. Among these make-up removers, there are O/W and W/O emulsion type make-up removers which are emulsified with amphiphathic substance, and oil type make-up remover, which mixes several kinds of oily ingredients. Further, in recent, there is aqueous type make-up remover, which comprises a large amount of surfactant having middle level of HLB without oily ingredient.
However, in case of skin care products, water and oils emitted due to demulsification tend to separate in the process of making them adapt to skin. Accordingly, there is restriction on the amount of surfactant and the kind of oily ingredient in order to ameliorate skin adaptation. There also is restriction on the kind of surfactant in case of compounding silicon oils that provide smooth feeling. In case of O/W emulsion type make-up remover, there is a problem that adaptation to skin is slow because adaptation to makeup occurs after coalescence of emulsion particle. Also, in case of W/O emulsion type or oil type make-up remover, there is almost no problem in adaptation to or removal of makeup. However, there is a great problems on the feeling of use, e.g., remain of oiliness after wiping off with a tissue paper or washing face. In case of aqueous type make-up remover, there is absolutely no oiliness, while there is a problem that effect for removing makeup is not sufficient. For the purpose of resolving such problems on make-up remover, an art using liquid crystal one-phase system which uses polar oils or paraffins is shown in such as Japanese Examined Patent Publication Nos. 1-53845 and 3-71475. In recent year, however, cosmetic durability of various make-up preparations has been ameliorated largely. In the present circumstances, adaptation to makeup and effect for removing makeup are not always sufficient in case of using polar oil or paraffins. Further, in case of using liquid crystal one-phase system as a make-up remover as it is, there remains the problem that heavy feeling is caused at application because liquid crystal structure is somewhat difficult to break.
SUMMARY OF THE INVENTION
The present invention is achieved in view of the foregoing prior art, an object of the present invention is to provide a liquid crystal composition and a cosmetic preparation which is favorable in adaptation to skin and gives smooth feeling in the case where both are used as a skin care product. Further, an object of the present invention is to provide a liquid crystal composition and a cosmetic preparation which is favorable in adaptation to makeup and has high makeup removing effect in the case where both are used as a make-up remover. Still further, an object of the present invention is to provide a liquid crystal composition and a cosmetic preparation which is favorable in adaptation to hair and has favorable feeling of use to provide glossiness to hair in the case where both are used as a hair care product.
As the result of diligent studies of the present inventors in view of the above-mentioned circumstances, it has been found that a cosmetic preparation which comprises 10to 60 wt % of a nonionic surfactant, 1 to 50 wt % in all of one or more of a water-soluble substance having a hydroxyl group, 1 to 70 wt % of a silicone oil, and 10 to 60 wt % of water, and has a liquid crystal phase and/or an isotropic surfactant continuous phase can resolve the above-mentioned problem. Further, it has been found that: a cosmetic preparation, which is favorable in adaptation to skin and gives smooth feeling in the case where the cosmetic preparation is used as a skin care product; a cosmetic preparation, which is favorable in adaptation to makeup and has high makeup removing effect in the case where the cosmetic preparation is used as a make-up remover; and a cosmetic preparation, which is favorable in adaptation to hair and has favorable feeling of use to provide glossiness to hair in the case where the cosmetic preparation is used as a hair care product. Accordingly the present invention has been accomplished.
Namely, a liquid crystal composition of the present invention comprises: (a) 10 to 60 wt % of a nonionic surfactant; (b) 1 to 50 wt % in all of one or more of a water-soluble substance having a hydroxyl group; (c) 1 to 70 wt % of a silicone oil; and (d) 10 to 60 wt % of water.
Also, a cosmetic preparation of the present invention comprises: (A) 10 to 60 wt % of a nonionic surfactant; (B) 1 to 50 wt % in all of one or more of a water-soluble substance having a hydroxyl group; (C) 1 to 70 wt % of a silicone oil; and (D) 10 to 60 wt % of water, wherein said cosmetic preparation has a liquid crystal phase and/or an isotropic surfactant continuous phase.
Also, the cosmetic preparation of the present invention is applied to skin.
Also, the cosmetic preparation of the present invention removes makeup.
Also, it is preferable that at least one of the water-soluble substance having a hydroxyl group is a water-soluble monohydric alcohol.
Also, it is preferable that at least one of the water-soluble substance having a hydroxyl group is a water-soluble polyhydric alcohol.
Also, it is preferable that a ratio of the nonionic surfactant and water (nonionic surfactant/water) is 0.5 to 4.
Also, it is preferable that a cosmetic preparation of the present invention is a one-phase system which is any one of a gel phase, a liquid crystal phase or an isotropic surfactant continuous phase those are formed by associating a surfactant or a coexisting-phase system of any one of the gel phase, the liquid crystal phase or the isotropic surfactant continuous phase and the other phases.
Also, it is preferable that the cosmetic preparation of the present invention is the one-phase system of the liquid crystal phase or the coexisting-phase system of plural phases including the liquid crystal phase.
Also, it is preferable that the cosmetic preparation of the present invention is the coexisting-phase system of plural phases including the liquid crystal phase.
Also, it is preferable that the cosmetic preparation of the present invention is the one-phase system of the isotropic surfactant continuous phase or the coexisting-phase system of plural phases including the isotropic surfactant continuous phase.
BEST MODE FOR CARRYING OUT THE INVENTION
As an example of the nonionic surfactant which is useful in the present invention, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, glycerin fatty acid ester, ethylene oxide derivatives of glycerin fatty acid ester, polyglycerin fatty acid ester, propylene glycol fatty acid ester, ethylene oxide derivatives of propylene glycol fatty acid ester, polyethylene glycol fatty acid ester, polyethylene glycol alkyl ether, polyethylene glycol alkyl phenyl ether, polyethylene glycol castor oil derivatives, and polyethylene glycol hydrogenated castor oil derivatives are cited. The amount of the nonionic surfactant is preferably 10 to 60 wt % and more preferably 15 to 50 wt %. Adaptation to skin, makeup or hair is not sufficient in the case where the amount of the nonionic surfactant is less than 10 wt %. In case of compounding the nonionic surfactant more than 60 wt %, it is not preferable be
Fujii Natsuko
Matsuzaki Fumiaki
Nakamura Kazuyoshi
Watanabe Kei
Yanaki Toshio
Kopec Mark
Petruncio John M
Shiseido Co. Ltd.
Snider Ronald R.
Snider & Associates
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