JP3268504B2 - Gel composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gel composition containing an oil component stably. More specifically, the present invention relates to a gel composition suitable for various external preparations containing an oil that maintains physical properties immediately after production for a long period of time even when stored at a high temperature.

[0002]

2. Description of the Related Art Various external preparations in which an oil component is mixed with an aqueous solvent and the dosage form of which is prepared as a gel are commercially available. As such an external preparation, for example, there is a gel-like cleansing cosmetic. Cleansing cosmetics usually contain a large amount of oil as a component to remove makeup cosmetics, but as a dosage form, a gel form is preferred in consideration of usability such as ease of stretching. I have. In order to form a gel, a water-soluble polymer compound known as a gelling agent is generally added. However, a gel composition containing a water-soluble polymer tends to separate an oil component when stored or left at a relatively high temperature of about 40 to 50 ° C. In particular, when the gel composition is prepared in a transparent type or a translucent type, it causes a clouding phenomenon, which greatly impairs the usability and commercial value of the product.

Recently, an oil-containing gel cosmetic in which a lamellar liquid crystal structure is formed by adding an ethylene oxide adduct of a Guerbet-type alcohol has been proposed (Japanese Patent Laid-Open No. 62-9 / 1987).
No. 6585), however, also at high temperatures, the liquid crystal structure tends to be destroyed, and the oil component tends to be separated, resulting in cloudiness.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made under such circumstances, and maintains long-term stability even when stored or left at high temperatures, as well as gel-forming properties. An object of the present invention is to provide an oil-containing gel composition.

[0005]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have used a specific polyoxypropylene polyoxyethylene alkyl ether having a polyoxypropylene chain bonded to a higher alcohol. As a result, they have found that the above problem can be solved, and have completed the present invention.

That is, according to the present invention, the weight ratio of polyoxypropylene polyoxyethylene alkyl ether represented by the following general formula, oil, glycerin and sorbite is adjusted to 9: 1 to 2: 8. A gel composition characterized by containing a polyhydric alcohol mixture used in combination and water. _{RO (C 3 H 6 O)} m (C 2 H 4 O) n H ( where in the above formulas, R represents a linear or branched alkyl group having 10 to 30 carbon atoms, m is 4-8 Indicates the integer of
n shows the integer of 1-50. )

The polyoxypropylene polyoxyethylene alkyl ether used for gelling in the present invention is represented by the following general formula: RO (C ₃ H ₆ O) _m (C ₂ H ₄ O) _n H (wherein , R represents a linear or branched alkyl group having 10 to 30 carbon atoms, m represents an integer of 4 to 8,
n shows the integer of 1-50. ) Is a nonionic surfactant. These compounds may be used in combination of two or more. The HLB value of these compounds is about 10
18.

[0008] Polyoxypropylene polyoxyethylene alkyl ethers particularly useful in the present invention include:
For example, polyoxypropylene (4) polyoxyethylene (10) cetyl ether, polyoxypropylene (8) polyoxyethylene (20) cetyl ether, polyoxypropylene (6) polyoxyethylene (20)
Decyl tetradecyl ether and polyoxypropylene (6) polyoxyethylene (30) decyl tetradecyl ether can be exemplified. The amount is usually 1
-30% by weight, preferably 5-25% by weight. If the amount is less than 1% by weight, the gel forming power is insufficient. Also 30
If the content exceeds 10% by weight, the product solidifies and becomes difficult to use.

The oil component used in the present invention is an oil component commonly used as a component of cosmetics or external medicines, for example, hydrocarbons, higher alcohol fatty acid esters, higher alcohols, higher fatty acids, animal and vegetable oils, and synthetic oils. ,
And cholesterol fatty acid esters. Among these are liquid paraffin, octadecyl myristate,
Olive oil, glyceryl triisooctanoate, triglyceride 2-ethylhexanoate, and isostearyl cholesteryl ester are particularly preferred specific examples. These oils may be used in combination of two or more. The amount is based on the weight of the gel structure of the present invention,
Usually, it is 1 to 90% by weight, preferably 30 to 80% by weight. If the amount is less than the above range, elongation during use of the product is undesirably reduced. On the other hand, if it exceeds the above range, the oil component is easily separated, and it becomes difficult to maintain the stability of the gel.

Next, the polyhydric alcohol used in the present invention comprises glycerin / sorbitol from 9/1 to 2/8.
(Weight ratio) is a mixture of polyhydric alcohols,
This results in very good gel formation and high temperature stability. The blending amount of the polyhydric alcohol mixture in the present invention depends on the desired feeling of use and product viscosity, but is usually in the range of 1 to 50% by weight, preferably 5 to 20% by weight. If the amount is less than the above range, the gel becomes hard and there is a problem in usability. On the other hand, if it exceeds the above range, it becomes difficult to gel.

In the present invention, the amount of water is determined according to the desired physical properties of the product, but is usually in the range of 1 to 30% by weight, preferably 5 to 20% by weight. If the amount is outside the above range, it becomes difficult to stably maintain the gel.

In the present invention, as long as the object of the present invention is not impaired, auxiliary components generally used in cosmetics, pharmaceuticals and the like can be blended. For example, proteins (collagen and its hydrolysates, albumin, casein, milk protein hydrolysates, soy protein hydrolysates, etc.),
Fungicides (isopropylmethylphenol, salicylic acid,
Trichlorohydroxydiphenyl ether, etc.), amino acids and their derivatives (aspartic acid, alanine, glycine, serine, pyrrolidone carboxylic acid, etc.), plant extracts (aloe extract, ougon extract, cucumber extract, horsetail extract, loofah extract, peach leaf extract, etc.) ,
Anti-inflammatory agents (guaiazulene, glycyrrhizic acid, methyl salicylate, etc.), vitamins and their derivatives (ascorbic acid, γ-oryzanol, tocopherol, pantothenyl ethyl ether, etc.), ultraviolet absorbers (urocanic acid,
Oxybenzone, sinoxate, octyl methoxycinnamate), antioxidants, preservatives, pigments, fragrances and the like.

The gel composition of the present invention is prepared by appropriately mixing the above polyoxypropylene polyoxyethylene alkyl ether, oil, glycerin, sorbite and water, for example, in the above-described suitable amounts, heating and dissolving, and then stirring. It can be easily prepared by cooling to room temperature. According to the present invention, a structurally stable gel composition can be extremely easily prepared due to its excellent composition without using a special atomizer or the like. That is, the polyoxypropylene block (hydrophobic portion) and the polyoxyethylene block (hydrophilic portion) which are appropriately arranged in the molecule, together with glycerin and sorbite, structurally take in and stabilize the oil component.
The gel composition of the present invention can be suitably used as various external preparations. Examples of the external preparation include skin or hair cosmetics such as cleansing (cosmetics), massage gels and hair styling agents, and agents such as anti-inflammatory agents and pest repellents.
Among these, it is more preferable to use it as a cleansing cosmetic.

[0014]

The gel composition of the present invention has excellent gel-forming properties, and the obtained gel composition can be used to store or leave a gel cosmetic in a relatively hot place such as a bathroom. Even if it does, it has the effect that the oil component is hard to separate and is stable for a long period of time.

[0015]

Next, the present invention will be described in more detail by way of examples.

Example 1 20% by weight of a surfactant shown in Table 1, 55% by weight of glyceryl trioctanoate, 6% by weight of glycerin, 6% by weight of sorbitol
% By weight and 13% by weight of water were placed in a beaker and heated to 80 ° C. After dissolution, the mixture was cooled to room temperature with stirring to prepare a gel cleansing cosmetic. For each sample, the gel-forming properties at the time of preparation (good Δ, poor ×) and the appearance after storage at 50 ° C. for one month were evaluated.
What separated the oil was rated as x. ). Table 1 shows the results. In addition, when the gel cleansing cosmetics of Examples 1 and 2 were actually used for removing makeup, all of the feeling of use such as stretching and sliding, the washing property, the refreshing feeling after washing, and the effect of removing makeup were good. Was.

[0017]

[Table 1]

Next, various cosmetics shown below were used in Example 1.
It was prepared and evaluated in the same manner as described above. All samples showed good gel-forming properties and high-temperature storage stability.

Example 3 (Cleansing cosmetic) Glyceryl triisooctanoate 50 (% by weight) Liquid paraffin 20 Polyoxypropylene (6) Polyoxyethylene (30) Decyltetradecyl ether 10 Glycerin 5 Sorbit 5 Preservatives Appropriate amount Perfume Appropriate amount Purification Water balance

Example 4 (Cleansing Cosmetic) Glyceryl triisooctanoate 40 (% by weight) Squalane 15 Octamethylcyclotetrasiloxane 2 Polyoxypropylene (8) Polyoxyethylene (20) Cetyl ether 13 N-coconut fatty acid acyl Sodium L-glutamate 4 Glycerin 8 Sorbit 4 Preservatives proper amount Perfume proper amount Purified water balance

Example 5 (massage cosmetic) Glyceryl triisooctanoate 55 (% by weight) Jojoba oil 5 Polyoxypropylene (6) Polyoxyethylene (30) Decyltetradecyl ether 13 Glycerin 7 Sorbit 7 Kidachiaroe 0.1 Preservative Appropriate amount Perfume Appropriate amount Purified water Balance

Example 6 (Cleansing cosmetic) Glyceryl triisooctanoate 60 (% by weight) Polyoxypropylene (6) Polyoxyethylene (30) Decyltetradecyl ether 10 Polyoxyethylene (25) Glyceryl pyroglutamic acid Isostearic acid diester 8 Glycerin 4 Sorbite 6 Isopropyl methylphenol 0.1 Ethanol 2 Perfume Appropriate amount Purified water Balance

Example 7 (Hairdressing agent) Glyceryl triisooctanoate 45 (% by weight) Octamethylcyclotetrasiloxane 10 Polyoxypropylene (8) Polyoxyethylene (20) Cetyl ether 15 Polyoxyethylene (20) Glyceryl monoisoste Allate 2 Glycerin 5 Sorbit 7 Collagen 0.1 Ethanol 3 Preservatives qs Perfume qs Purified water balance

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI A61K 7/06 A61K 7/06 C08K 5/01 C08K 5/01 5/053 5/053 5/09 5/09 5/10 5 / 10 (56) References JP-A-61-37709 (JP, A) JP-A-62-96585 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C08L 71/02- 71/03 A61K 7/00-7/50 C08K 5/01 C08K 5/05-5/057 C08K 5/09-5/098 C08K 5/10-5/12

Claims (3)

(57) [Claims] 1. A polyoxypropylene polyoxyethylene alkyl ether represented by the following general formula, an oil component,
A gel composition comprising a polyhydric alcohol mixture in which glycerin and sorbit are used in a weight ratio of 9: 1 to 2: 8, and water. _{RO (C 3 H 6 O)} m (C 2 H 4 O) n H ( where in the above formulas, R represents a linear or branched alkyl group having 10 to 30 carbon atoms, m is 4-8 Indicates the integer of
n shows the integer of 1-50. ) 2. The polyoxypropylene polyoxyethylene alkyl ether 1 to 30% by weight, the oil 1 to 3
90% by weight, 1 to 50% by weight of the above polyhydric alcohol mixture
The gel composition according to claim 1, comprising 1 to 30% by weight of the water. 3. The gel composition according to claim 1, which is a cleansing cosmetic.