JPS62143971A - Gelatinous composition - Google Patents

Abstract

PURPOSE:A gelatinous composition suitable for cosmetic or medical use, having low viscosity and high volatility, obtained by blending a specific cyclic dimethylpolysiloxane with an ester of a higher fatty acid and an aliphatic alcohol as a saponifying agent. CONSTITUTION:(A) 30-90pts.wt., preferably 40-85pts. preferably 40-85pts.wt. cyclic dimethylpolysiloxane shown by formula I (n is 3-6) is blended with (B) 5-50pts.wt., preferably 7-45pts.wt. one or mixture of esters of 8-24C fatty acid and 1-24C aliphatic alcohol or 10-40C aliphatic hydrocarbon and (C) 5-30pts.wt., preferably 7-25pts.wt. dextrin phosphoric acid ester shown by formula II (A is H or 8-20C acyl; l is 20-30).

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a gel-like composition, particularly a silicone oil that does not use fillers such as silica and is useful as a base material for cosmetics. The present invention relates to a gel composition.

(Prior Art) Various silicone oils are added to pastes, creams, pressed compositions, etc. for cosmetics and medical purposes, but there are few examples of the use of silicone compositions as a base material.

This is because to make silico oil into a gel-like substance, it is necessary to add thickeners such as hydrophobic silica and bentone as inorganic fillers, and the silico oil used also has a viscosity of 100 cS or more at 25°C. Because it needs to have a relatively high viscosity, when the gel-like material obtained in this way is applied to the skin surface, it feels heavy and sticky, and it has almost no volatile content, so it does not feel sticky. It is said that this is because there is a disadvantage of remaining for a long period of time.

Therefore, there is a long-awaited need for a gel-like composition based on silicone, which has low viscosity and high volatility, and which solves these drawbacks.

(Structure of the Invention) The present invention relates to a silicone-based gel composition that solves the above-mentioned disadvantages. This includes 1) 30 to 90 parts by weight of a cyclic dimethylpolysiloxane represented by the formula %), 2) an ester of a fatty acid having 8 to 24 carbon atoms and an aliphatic alcohol having 1 to 24 carbon atoms, or a cyclic dimethylpolysiloxane having 10 to 40 carbon atoms. 5 to 50 parts by weight of one or a mixture of two or more selected from aliphatic hydrocarbons, 3) Dextrin fatty acid ester 5
~30 parts by weight.

That is, the present inventors conducted various studies on gel compositions based on silicone oil, which are particularly useful for cosmetics and medical purposes, and found that cyclic dimethylpolysiloxane represented by the above formula was used as the silicone oil. In addition, when an ester of a higher fatty acid with an aliphatic alcohol or an aliphatic hydrocarbon and a dextrin fatty acid ester is used as the gelling agent, the desired gel composition can be easily obtained. We confirmed that when applied to the skin, it spreads easily and has a light feeling of use, and that the cyclic dimethylpolysiloxane evaporates after application, so the wet feeling does not remain for any length of time. Completed the invention.

The silicone oil as the first component constituting the gel composition of the present invention is a cyclic dimethylpolysiloxane represented by the formula, and this oil exhibits its properties after using the gel composition containing it. Since it is desirable that the n value be 3 to 6. In addition, this item may be used as one type,
A mixture of two or more types may be used, but the amount used is such that the amount of the first component is 30 parts by weight in 100 parts by weight of the gel composition.
If it is less than 90 parts by weight, the amount of other components will be too large and the light spreadability expected of this composition will be poor, and the sticky feeling will increase, and if it is more than 90 parts by weight, sufficient gelation will not be achieved. A range of 90 parts by weight is required, with a preferred range of 40 to 85 parts by weight.

Further, the second component in this composition is an ester of a higher fatty acid having 8 to 20 carbon atoms and an aliphatic alcohol having 1 to 24 carbon atoms, or an aliphatic hydrocarbon having 10 to 40 carbon atoms, as described above. Higher fatty acid monoesters such as isopropyl myristate, butyl myristate, myristyl myristate, octyldecyl myristate, cetyl inoctylate, decyl oleate, butyl stearate, hexyl laurate, isopropyl valmitate, and butyl palmitate , higher fatty acid diesters such as propylene glycol dioleate and neopentyl glycol di-2-ethylhexanoate, higher fatty acid triesters such as caprylic acid triglyceride and capric acid triglyceride, as well as squalane, Isopar [manufactured by Exxon Chemical, aliphatic carbonization] Examples include [trade name of hydrogen-based solvent], but these may be used alone or in a mixture of two or more. Note that this second
If the amount of the second component in 100 parts by weight of the gelling composition is less than 5 parts by weight, the silicone oil as the first component will not gel, and if it is 50 parts by weight or more, it will be advantageous. The gel-like composition produced will have poor light extensibility and will have an increased sticky feel, so
The preferred range is 7 to 45 parts by weight.

Next, the dextrin fatty acid ester as the third component in this gel composition has, for example, a structural formula shown by the following formula, where A is a hydrogen atom or an acyl group having 8 to 20 carbon atoms and accounts for at least 50% of the total number of moles of A. is an acyl group.

Q is 20 to 30, and this usage amount is such that the amount of the third component in 100 parts by weight of the gel composition is 5.
Below 3 parts by weight, silicone oil will not gel.
If the amount is more than 0 parts by weight, the resulting composition will be too hard and have poor extensibility, so it is necessary to use it in the range of 5 to 30 parts by weight, but this preferred range is 7 to 2 parts by weight.
5 parts by weight.

The gel composition of the present invention can be obtained by uniformly mixing predetermined amounts of the first to third components described above, but this mixing is preferably carried out at 50 to 100°C, for example at 100°C. The desired homogeneous gel composition can be obtained by uniformly dissolving the aforementioned fatty acid ester or aliphatic hydrocarbon and dextrin fatty ester in silicone oil by heating and stirring, and then cooling.

In addition, this composition contains various oily agents, fragrances, pharmaceutical ingredients,
Addition of antioxidants, pigments, dyes, etc. is optional as long as it does not significantly change the physical properties of the composition of the present invention.

Next, examples of the present invention will be given, in which parts are parts by weight, and viscosity is a value measured at 25°C.

Examples 1 to 10 Octamethylcyclotetrasiloxane KF994 (product name manufactured by Shin-Etsu Chemical Co., Ltd.) and decamethylcyclopentasiloxane KF995 [product name manufactured by the same company] in the amounts shown in Table 1 were added to the types shown in Table 1. and the amount of higher fatty acid ester or aliphatic hydrocarbon and the amount of dextrin fatty acid ester shown in Table 1, and the total amount of 30
0g was put into a 500+nfl hard glass flask, stirred at 60-70°C, and after confirming that it had become a homogeneous solution, stirring was stopped and quenched in an ice water bath, a homogeneous gel-like composition was obtained. Therefore, the consistency and oil separation of this composition were measured according to JIS K2220, and the results shown in Table 1 were obtained.

Comparative Example Cyclic dimethylpolysiloxane KF9 used in Example
94 or 270 parts of KF995, 30 parts of dextrin fatty ester Leopard KL (part name manufactured by Chiba Flour Milling)
6 parts in a 500 m12 hardened glass flask.
Although it was stirred at 0 to 70'C, Leopard KL did not dissolve uniformly in the silicone oil, and when it was rapidly cooled in an ice water bath after stirring, Leopard KL precipitated and no gelation was observed. ”,f,' Procedural Amendment May 12, 1986 Mr. Michibu Uga, Commissioner of the Patent Office -'-“.

1. Indication of the case 1985 Patent Application No. 284930 2. Name of the invention Gel composition 3. Person making the amendment Relationship to the case Name of patent applicant (206) Shin-Etsu Chemical Co., Ltd. 4. Agent 1. -・-・1 5. Date of amendment order “voluntary” 6. “Detailed description of the invention column” of the specification subject to amendment ■) “Fatty acid ester” in the first line of page 9 of the specification Acid ester Leopard KL [Part name manufactured by Chiba Flour Mills]".

2) In the margins (notes) 1) and (notes) 4) of Table 1 on page 10 of the specification, "[Nissin essential oil @ split product name]" is amended to "[Nissin oil ■ mounting product name]" .

that's all

Claims (1)

[Claims] 1, 1) 30 to 90 parts by weight of a cyclic dimethylpolysiloxane represented by the formula ▲ Numerical formula, chemical formula, table, etc. ▼ (n = 3 to 6), 2) Fatty acid having 8 to 24 carbon atoms and a C1-C24 aliphatic alcohol or a mixture of one or more selected from C10-40 aliphatic hydrocarbons5-
3) 5 to 30 parts by weight of dextrin fatty acid ester.