JPH08217627A - Emulsified composition - Google Patents

Abstract

PURPOSE: To obtain an emulsified composition excellent in long-term stability even without using any surfactant, containing, as active ingredients, an alkyl- modified carboxyvinyl polymer, oily component and gummy matter. CONSTITUTION: This emulsified composition contains, as active ingredients, 0.01-1wt.% of an alkyl-modified carboxyvinyl, polymer (e.g. acrylic and methacrylic alkyl ester copolymer, trade name: PEMULEN TR-l), 0.5-50wt.% of an oily component (e.g. liquid paraffin, squalene), and 0.01-5wt.% of a gummy matter (e.g. xanthane gum). Besides, this composition is formulated, according as appropriate, with vitamins, hormones, ultraviolet absorber, antiseptic agent, germicide, perfume, coloring matter, etc. Combined use of a lipophilic activator (e.g. a sorbitan fatty acid ester) with the above ingredients further improves the emulsion stability of this composition. Thus the objective stable emulsified composition free from oil floating etc., over a long period can be obtained even without using any surfactant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified composition, and more particularly to an emulsified composition excellent in long-term stability without using a surfactant.

[0002]

2. Description of the Related Art Conventionally, as an emulsion composition for cosmetics, a cream prepared by emulsifying various oily and aqueous raw materials,
Emulsion etc. are widely used. In order to obtain such an emulsified composition, it has been essential to use a surfactant in order to ensure the stability of the emulsified composition over time.

However, in recent years, further safety has been expected for cosmetics, and from this viewpoint, the blending of a surfactant may be a problem. Therefore, a method for obtaining an emulsified composition without using a surfactant has also been proposed (Japanese Patent Publication No. 2-38253, Japanese Patent Publication No. 62-3168).
No. 1 and Japanese Patent Publication No. 61-38166).

[0004]

However, these emulsified compositions are not always satisfactory in terms of long-term stability of emulsification.

Therefore, as a result of repeated studies to solve the above problems, the present inventors have found that the long-term stability of emulsification and the feeling of use are improved by blending an alkyl-modified carboxyvinyl polymer and a gum. They have found the present invention and completed the present invention.

That is, an object of the present invention is to provide an emulsified composition which does not use a surfactant and has good emulsion stability over time.

[0007]

The emulsion composition of the present invention comprises:
It is characterized by containing an alkyl-modified carboxyvinyl polymer, an oily component, and a gum substance. It is also characterized in that it contains substantially no surfactant.

The amount of the alkyl-modified carboxyvinyl polymer is 0.01 to 1% by weight, the amount of the oily component is 0.5 to 50% by weight, and the amount of the gum is 0.0.
It is preferably 1 to 5% by weight.

The alkyl-modified carboxyvinyl polymer used in the present invention is an alkyl acrylate methacrylate copolymer, such as Carbopol 134.
2, Pemulen TR-1, Pemulen (Pem)
ulen) TR-2 (manufactured by BF Goodrich) is known.

The content of the alkyl-modified carboxyvinyl polymer is preferably 0.01 to 1% by weight in the emulsion composition.
More preferably, it is 0.03 to 0.5% by weight. 0.
If it is less than 01% by weight, it is difficult to emulsify, and even if it exceeds 1% by weight, an increase in the emulsifying action and the effect of improving the emulsion stability cannot be expected. Further, from the viewpoint of usability, 0.03 to
The most preferred range is 0.5% by weight.

Incidentally, a carboxyvinyl polymer which is usually used as a thickener (for example, Carbopol (Carb
opol) 941 (manufactured by BF Goodrich), Hibiswako 105 (manufactured by Wako Pure Chemical Industries) and the like cannot stably emulsify oil.

The gum used in the present invention is not particularly limited, and examples thereof include Xanthonas spp.
Xanthan gum, which is a natural gum substance produced by fermenting carbohydrates using monos campestris) and purifying the polysaccharides accumulated outside the cells (for example, keltrol (Koei Kogyo Co., Ltd.)
Etc.) First-year legume guar (Cyamopsis tetragonol)
obus), which is a polysaccharide obtained from the endosperm portion of seeds such as guar gum and gum arabic. The blending amount is 0.
01 to 5% by weight is suitable.

As the oily component used in the present invention, both polar and nonpolar ones usually used in cosmetics can be used, and examples thereof include macadamia nut oil, evening primrose oil, olive oil, mink oil, jojoba oil, lanolin and squalene. Natural animal and vegetable oils and fats, liquid paraffin, squalane, petrolatum and other hydrocarbons, paraffin wax, whale wax, beeswax, candelilla wax, carnauba wax and other waxes, cetanol, stearyl alcohol, cetyl alcohol and other higher alcohols , Myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, oleic acid, linolenic acid, linoleic acid,
Higher fatty acids such as linoleic acid and oxystearic acid,
Tetra 2-ethylhexanoic acid pentaerythritol, isopropyl myristic acid, isopropyl palmitic acid, isopropyl isostearic acid, 2 ethylhexanoic acid glyceryl ester, etc., diethylene glycol monopropyl ether, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxypropylene It is also possible to add a polar oil such as butyl ether or ethyl linoleate, or a silicone oil. Of these, if a large amount of a solid or semi-solid oily component is blended, the aggregating action becomes strong and the appearance and the state of the particles deteriorate, so it is preferable to use a large amount of liquid oil. The ratio of the liquid oil to the entire oil component is preferably 50% by weight or more. Further, the amount of the entire oil component to be added to the emulsified composition is suitably 0.5 to 50% by weight.

In the emulsified composition of the present invention, vitamins such as vitamin A, vitamin B, vitamin D, vitamin E, tocopherol acetate, ascorbic acid ester, vitamin A acid, lecithin, γ-oryzanol and folic acid, and vitamins. -Like substances, estradiol, estradiol valerate, ethinyl estradiol, prostaglandins, hormones such as testosterone propionate, benzophenone, 4-t-butyl-4-methoxy-
UV absorbers such as dibenzoylmethane, glyceryl dimethoxycinnamate ethylhexanoate, p-aminobenzoic acid ester, octyl paramethoxycinnamate and phenyl salicylate, anti-inflammatory agents such as L-menthol and camphor,
Preservatives such as methylparaben, ethylparaben and butylparaben, and bactericides such as triclosan and dibutylhydroxytoluene can be added.

Further, to the emulsion composition of the present invention, if necessary, suitable fragrances, dyes and the like may be added within a range that does not impair the emulsion stability and the feeling of use.

When a lipophilic activator such as monoglyceride, sorbitan fatty acid ester and diglycerin isostearic acid ester is used in combination, the emulsion stability is further improved.

[0017]

EXAMPLES The present invention will be described in more detail below with reference to examples and comparative examples. Note that the present invention is not limited by this. In addition, the compounding amounts shown below are all% by weight.

(Example 1, Comparative Examples 1 to 3) Emulsifying cosmetic emulsion compositions having various compositions shown in Table 1 were prepared by emulsifying with an emulsifier while adding an oil phase component to an aqueous phase component. The stability of the composition was evaluated. The evaluation results are also shown in Table 1.
The criteria for evaluating the stability of the emulsified composition were as follows. [Stability Evaluation Criteria] ◯: Oil separation is not recognized at all Δ: Oil separation is slightly recognized ×: Oil separation is clearly recognized

[0019]

[Table 1] ─────────────────────────────────── Component Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 ─────────────────────────────────── A. Oil phase Liquid paraffin 10.0 10.0 10.0 10.0 10.0 Squalane 3.0 3.0 3.0 3.0 3.0 B. Water phase Alkyl-modified carboxy 0.3 0.3-Vinyl polymer (Pemulene TR-2) Hibiswako 105 --- 0.3 KOH 0.1 0.1-0.1 Xanthan gum (Keltrol) 0.2- 0.2 0.2 Glycerin 5.0 5.0 5.0 5.0 5.0 Ethyl alcohol 5.0 5.0 5.0 5.0 Methylparaben 0.1 0.1 0.1 0.1 Deionized water residue Residual Residual Residual Residual ─────────────────────────────────── Stability at 50 ℃ for 1 month ○ △ × △ ────────────────────────────────────

As is clear from Table 1, the combined use of an alkyl-modified carboxyvinyl polymer and a gum gives
It is found that a stable emulsion composition can be obtained.

Example 2 An emulsified composition having the composition shown in Table 2 was produced in the same manner as in Example 1. When the same evaluation as in Example 1 was performed, the emulsion composition of this example showed excellent stability as in Example 1.

[0022]

[Table 2] ───────────────────────────────────────────────────────────────────────────────────── ──────────────────────────── A. Oil phase Dimethyl polysiloxane 10 Macadamia nut oil 5 Vaseline 10 B. Aqueous Phase Alkyl-Modified Carboxyvinyl Polymer 0.9 (Pemulene TR-1) Xanthan Gum (Celtrol) 1 Polyethylene Glycol 5 Dipropylene Glycol 7 Triethanolamine 0.6 Sodium Metaphosphate 0.1 Methylparaben 0.1 Sodium Chondroitin Sulfate 0. 3 Residual ion-exchanged water ────────────────────────────────────

Example 3 An emulsified composition having the composition shown in Table 3 was produced in the same manner as in Example 1. When the same evaluation as in Example 1 was performed, the emulsion composition of this example showed excellent stability as in Example 1.

[0024]

[Table 3] ─────────────────────────────────────────────────────────────────────────────────────────────── ──────────────────────────── A. Oil phase Liquid paraffin 10 Olive oil 1 Lanolin 3 Glyceryl tri-2-ethylhexanoate 2 2-Ethylhexyl paramethoxycinnamate 1 Vitamin E acetate 0.3 Butylparaben 0.2 Perfume 0.1 B.I. Aqueous phase Propylene glycol 6 1,3 Butylene glycol 4 Sodium hyaluronate 0.1 Trisodium edetate 0.1 Alkyl-modified carboxyvinyl polymer 0.5 (Carbopol 1342) Guar gum 3 Magnesium ascorbyl phosphate 1 Placenta extract 0.3 KOH 0.2 Ion-exchanged water Residual ────────────────────────────────────

Example 4 An emulsion composition having the composition shown in Table 4 was produced in the same manner as in Example 1. When the same evaluation as in Example 1 was performed, the emulsion composition of this example showed excellent stability as in Example 1.

[0026]

[Table 4] ─────────────────────────────────── Component blending amount ─────── ──────────────────────────── A. Oil phase Dimethylpolysiloxane 0.5 Decamethylcyclopentasiloxane 1 Jojoba oil 0.5 B. Aqueous phase Arbutin 1 Carrot extract 0.5 Alkyl-modified carboxyvinyl polymer 0.05 (Pemulene TR-2) Hibiswako 105 0.3 Gum Arabic 0.05 Ethyl alcohol 8 Trisodium edetate 0.1 Methylparaben 0.1 Phenoxyethanol 0 .2 KOH 0.15 Ion-exchanged water Residue ────────────────────────────────────

[0027]

According to the present invention, namely, the emulsion composition contains an alkyl-modified carboxyvinyl polymer, an oily component, and
By blending with a gum substance, an emulsified composition having excellent long-term stability of emulsification can be obtained.

Claims (5)

[Claims] 1. An emulsion composition comprising an alkyl-modified carboxyvinyl polymer, an oily component, and a gum substance. 2. The emulsion composition according to claim 1, which is substantially free of a surfactant. 3. The emulsion composition according to claim 1, wherein the amount of the alkyl-modified carboxyvinyl polymer compounded is 0.01 to 1% by weight. 4. The emulsified composition according to any one of claims 1 to 3, wherein the blending amount of the oily component is 0.5 to 50% by weight. 5. The emulsified composition according to any one of claims 1 to 4, wherein the content of the gum is 0.01 to 5% by weight.