Compositions – Inorganic luminescent compositions – Tungsten containing
Patent
1997-03-11
1998-06-23
Lovering, Richard D.
Compositions
Inorganic luminescent compositions
Tungsten containing
424 702, 424 7031, 424401, 514937, 514975, B01J 1300, A61K 7075, A61K 708, A61K 711
Patent
active
057701121
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/JP96/01939 filed on Jul. 12, 1996.
The present invention relates to an oil-in-alcohol emulsified composition and in particular, relates to the improvement of its surfactant.
In general, a hair cosmetic preparation is compounded with a large amount of alcohol, in particular ethyl alcohol, as compared with a cosmetic preparation which is applied in other regions. These lower alcohols are worked as a solvent of various ingredients and provide a refresh feeling and disinfectant property in the case where they are applied on hair.
The term hair cosmetic preparation has a significant meaning as a hair dressing function, and polyalkylene glycol which has high alcohol solubility is normally used for giving this hair dressing function.
On the other hand, emulsion type hair cosmetic preparations such as hair cream, have attracted attention from because of the requirements for giving hair gloss, softness, and moisture, and making it easier to comb. Emulsion type hair cosmetic preparations are compounded with an oily component such as silicone oil, liquid paraffin, petrolatum, and the like.
However, it is considerably difficult to make the various oily components disperse and compound uniformly into lower alcohol based compositions.
Namely, the compositions referred to as an emulsified compositions in general, mean the dispersion system of water and oil. For example, in the case of preparing an oil-in-water emulsion, the composition and the amount of the oil phase are determined in first, and then, the type and the amount of the emulsifier which is suitable, and the proper emulsifying process are selected.
In the selection of this emulsifier, the concept of HLB which is experimentally established by Griffin et al. However, this concept of HLB is only related to the solubility of the surfactant in an oil-water system.
And, in general, the HLB of surfactant is prepared in the range of 7 to 18 in an oil-in-water emulsion and 3 to 7 in a water-in-oil emulsion respectively, and emulsification is performed by solubilizing the surfactants into the oil phase or the water phase.
In order to obtain a stable emulsion with a nonionic surfactant which chemically stable and which has a small possibility to degenerate other ingredients, it is necessary to combine a hydrophilic nonionic surfactant and a lipophilic nonionic surfactant. And further, it is necessary to arrange said surfactant to a boundary by enlarging the boundary area between the oil phase and the water phase by the using strong stirring power of a homogenizer and the like. In case of using a specific type of surfactant and further compounding the surfactant in a large amount, the stable emulsion can be obtained without using the above-mentioned process. However, in rare occasions, an allergic reaction is observed in some people. So, in the case where the surfactant is used in the above-mentioned cosmetic preparations, it is necessary to select carefully the type and the amount of the surfactant added.
And, in the case where the hydrophilic property of the hydrophilic nonionic surfactant is in extremely high (HLB is more than about 20), the ability of surface activity is decreased. So, even in the case where a hydrophilic nonionic surfactant is compounded with a lipophilic nonionic surfactant, it is difficult to obtain a stable emulsion.
And further, in reference to the stability of the emulsion, the emulsion which is prepared by the conventional emulsifying process, is not so much favorable in the stability at a high temperatures in general, since the cloudy point of the nonionic surfactant used is relative low.
And, in an oil-in-alcohol emulsified composition which comprises an excessively large amount of alcohol with respect to an amount of water in an outer phase, the evaluation of the surfactant by means of HLB mentioned above is difficult, and the stable emulsion system has not been obtained so far.
For example, Japanese Unexamined Patent Publication No. Sho 60-197610 and Japanese Unexamined Patent Publication No. Sho 63-250311 d
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patent: 5302382 (1994-04-01), Kasprzak
Hineno Teruhiko
Nanba Tomiyuki
Ogawa Haruo
Omura Takayuki
Suzuki Kazuaki
Lovering Richard D.
Shiseido Co. Ltd.
Snider Ronald R.
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