JPH06264049A - Consistency improver for cosmetics or for external preparation for skin - Google Patents

Abstract

PURPOSE:To obtain the subject improver which effectively reduces the softening of a fat and oil component due to temp. rise by using a specific sucrose ester of a fatty acid as the effective component. CONSTITUTION:A sucrose ester of a 14C or higher satd. fatty acid having a mean degree of substitution with the acid of 4-7 is prepd. in advance. The ester is used, if necessary together with another emulsifier, as the effective component for producing a consistency improver for cosmetics (e.g. a cold cream) or for an external preparation for skin. Examples of the acid are myristic, palmitic, and stearic acids. The improver in an amt. of 0.1-5wt.% is compounded into a raw material oil (e.g. white vaseline) for an oily base of cosmetics or of an external preparation for skin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a consistency improving agent for cosmetics or external preparations for skin. For more details,
The present invention relates to a consistency improver for a base of a cosmetic or an external preparation for skin, which produces good extensibility and imparts excellent physical properties.

[0002]

2. Description of the Related Art Conventionally, lipsticks, lip balms, tics, pomades and ointments for external use which have been used as cosmetics use petroleum jelly, liquid paraffin, solid paraffin, lanolin and beeswax as an oily base material. In many cases, a pigment, a fragrance, a preservative, a medicinal active ingredient, or the like is mixed with this to be used as a cosmetic or an ointment. These cosmetics, ointments and the like are used to protect the skin and hair and maintain their healthy condition, or to perform treatment such as transdermal absorption of medicinal ingredients, and their individual characteristics are It depends on the purpose of use. And these cosmetics and ointments need to have a good feeling of use, are easily applied to the skin and hair, and are used with an appropriate consistency in order to exert the effect of the contained active ingredient. .

Lipsticks and lip balms as cosmetics are extremely smooth in appearance and have excellent affinity and spreadability to the skin, excellent emollient effect, and the like. It is also required to have characteristics such as not changing. Similarly, in ointments as an external preparation for the skin, skin protective action, demulcent action,
In addition to functions such as drug delivery and transdermal absorption, quality maintenance is required for a long period of time. In order to exert such characteristics, various oily substances are blended or a part thereof is made into a water-in-oil type emulsion or the like.
However, there are many problems such as separation of oil-liquid components depending on the blending components, and changes in consistency due to changes in temperature, impairing the feeling of use.

[0004] According to "Today's external preparation for skin" (Masahiko Takano, published by Nanzandou in April 1984), vaseline and the like have other drawbacks such as poor water absorption and low skin permeability and strong adhesiveness. In addition, its melting point range is wide, and therefore, in general, a low melting point substance may have a tendency to liquefy in summer due to changes in temperature. In order to improve such a defect, it is necessary to increase the consistency by blending wax or solid paraffin, but in order to obtain a sufficient effect, it is difficult to blend and the product properties are not stable. ing. Then, in order to eliminate such a defect, a base such as a mixture of a heavy hydrocarbon wax and a mineral oil has been developed. It is said that its consistency hardly changes even in a wide temperature range of 15 to 60 ° C., but it also has a defect that the consistency does not return to the original once dissolved. As described above, there is a problem in that the amount of vaseline or the like cannot be increased because the consistency of the vaseline changes greatly in summer and winter. Further, paraffin wax and the like are also used as an oily raw material for cosmetics having a high viscosity, but if the usage is wrong, it is desired to improve its properties such as a product that is too hard in winter and becomes soft and easily melted in summer. ("Fats and oils and surfactants for cosmetics" (Hiroshi Hirota, 1972, 2)
Published by Tsukiko Shobo)).

[0005]

As described above, there is a strong demand for a technique for improving the consistency of an oily base which is a base for cosmetics and external preparations for skin, and preventing softening due to temperature change and optionally adjusting the consistency. It was rare.

[0006]

In view of the above circumstances, the inventors of the present invention have conducted intensive studies on substances having improved oily substance consistency and excellent product properties, and as a result, by using a specific sucrose fatty acid ester, The present invention has been completed by finding that the consistency of the oily substance can be increased to reduce the decrease in the consistency even at a higher temperature. That is, the gist of the present invention is to use a sucrose fatty acid ester in which the fatty acid constituting the sucrose and the ester is a saturated fatty acid having 14 or more carbon atoms, and the average degree of substitution of the fatty acid for sucrose is 4 to 7 as an active ingredient. And a consistency improving agent for external preparations for skin or skin.

The present invention will be described in detail below. The present invention uses a sucrose fatty acid ester in which the fatty acid constituting the sucrose and the ester is a saturated fatty acid having 14 or more carbon atoms, and the average degree of substitution of the fatty acid with respect to sucrose is 4 to 7.
Examples of the fatty acid having 14 or more carbon atoms include myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid and the like, with palmitic acid and stearic acid being particularly preferred. Since these fatty acids are usually obtained from natural fats and oils, various fatty acids are usually mixed, and the fatty acid purity is 50% or more, preferably 60% or more.

The raw oily substance constituting the oil phase in the present invention includes hydrocarbons such as white petrolatum, yellow petrolatum, liquid paraffin, isoper, squalene, squalane, platin base, purified lanolin, lanolin alcohol, cholesterol, isopropyl lanolin, Lanolin and its derivatives such as acetylated lanolin, beeswax,
White beeswax, spermaceti, isopropyl myristate,
Isopropyl palmitate, higher fatty acids such as acetoglyceride, fatty acid esters of lower alcohols, higher fatty acids such as myristic acid, palmitic acid, stearic acid, camellia oil, peanut oil, olive oil, soybean oil,
Corn oil, Menjitsu oil, castor oil, vegetable oils such as coconut oil, liver oil, fish oil, animal fats and oils such as lard, and these animal, hardened oils of vegetable oils, cetal,
Examples include fatty acid higher alcohols such as stearyl alcohol, single products such as silicone oil, and mixtures of these oily substances. These raw oily substances include liquid paraffin, isopropyl myristate, etc., which are fluid at room temperature, white petrolatum, etc., semisolid, and beeswax, stearic acid, etc., in various forms. Further, it is used as a single product or a mixture of various raw materials depending on the purpose of use such as cosmetics such as cold creams and hand creams, ointments as external medicines and the like.

When a skin external preparation such as a cosmetic or an ointment is produced using the consistency improver of the present invention, the amount used is 0.1-5% by weight, preferably 0.5-3% by weight (total It is a composition standard). Moreover, you may use together other emulsifiers as needed. If it is less than 0.1% by weight, the effect of adjusting the consistency is poor, and if it is more than 5% by weight, the cost becomes high. As a method for producing a skin external preparation such as cosmetics or ointment using the consistency improver of the present invention, for example, the consistency improver is dissolved in a raw oily substance together with other components and stirred or cooled. Can be easily manufactured without. Raw oily substances include
Depending on the purpose, various agents used in cosmetics, external preparations for skin, acidic substances, preservatives, fragrances, pigments, antioxidants, etc. may be added in advance.

[0010]

It is presumed that by using the emulsifier of the present invention, fine crystals are formed in the oily substance and the network thereof is retained to increase the consistency. At the same time, it was speculated that such a network of crystals would prevent the decrease in consistency due to changes such as an increase in temperature, and it has not been known until now that an emulsifier has such an effect.

[0011]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof. Examples 1 to 3 and Comparative Examples 1 to 9 150 parts by weight of white petrolatum (reagent) was placed in a beaker,
To this, 1.5 parts by weight of the emulsifier shown in Table 1 was added and heated to 82 ° C to transparently dissolve the emulsifier. This was stored in a 25 ° C. constant temperature bath for 2 weeks. Next, rheometer (NR manufactured by Fudo Kogyo Co., Ltd.
The indentation load (g) of petrolatum was measured under the following conditions using M-2002J) to determine the petrolatum consistency. After the measurement, put the petrolatum again in the constant temperature bath at 30 ° C for 1
After storage for one day, the pushing load (g) was measured again with a rheometer. The results are shown in Table 1. Moreover, the crystal state and crystal size of petrolatum at 25 ° C. were observed with an optical microscope. In Table 1, the softening rate (%) was calculated by the following formula.

Rheometer measurement conditions Adapter 1 cm diameter Round flat plate Table speed 20 mm / cm Recorder chart speed 20 mm / cm Measurement temperature 25 ° C., 30 ° C.

[0013]

[Equation 1]

[0014]

[Table 1]

Example 4 67 parts by weight of white petrolatum, 12 parts by weight of liquid paraffin,
1 part by weight of sucrose stearate (average degree of substitution 5.5) is heated and mixed at 80 ° C. 3 while stirring this
After cooling to about 5 ° C., 20 parts by weight of zinc oxide fine powder was added and further kneaded to produce a zinc white ointment. The zinc white ointment obtained was excellent in appearance, hardness and extensibility.

Examples 5 to 6 and Comparative Example 10 33 parts by weight of beeswax (reagent) and 100 parts by weight of olive oil were placed in a 300 ml beaker, 1.3 parts by weight of the emulsifier shown in Table 2 was added, and the mixture was heated to about 82 ° C. Then, the emulsifier is transparently dissolved. Stir this with a propila stirrer (15
(0 rpm), the solution was gradually cooled to 40 ° C. to precipitate crystals to produce a single ointment. After storing this for 1 week in a 25 degreeC thermostat, the indentation load (g) was measured using the rheometer (made by Fudo Kogyo) by the method similar to Examples 1-3. Then, this was stored at 30 ° C. for 3 days, and then the pushing load (g) was measured in the same manner as at 25 ° C. Example 1
The softening rate was determined in the same manner as in ~ 3. The results are shown in Table 2. The case where no emulsifier was added is shown as Comparative Example 10.

[0017]

[Table 2]

[0018]

EFFECTS OF THE INVENTION According to the present invention, it is possible to improve the consistency of the bases of cosmetics and external preparations for skin, and to provide cosmetics and external preparations for skin with excellent quality. In particular, the effect of reducing the softening rate of the oil and fat component due to temperature change is great.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location A61K 47/26 Z 7433-4C // C07H 13/06

Claims (1)

[Claims] 1. A fatty acid which constitutes sucrose and an ester,
A consistency improver for a cosmetic or external preparation for skin, which comprises a sucrose fatty acid ester which is a saturated fatty acid having 14 or more carbon atoms and has an average degree of substitution of sucrose with a fatty acid of 4 to 7.