JPS6149284B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an improved oil-based foundation composition that has excellent moldability, moisturizing properties, and storage stability, exhibits little change in hardness due to temperature changes, and provides a good feel during use. Conventionally, oil-based foundations adhere too closely to the skin and form an occlusive oily layer, which tends to impede skin breathing and insensible excretion.Also, due to their strong lipophilic properties, they give an oily feel and do not bond well with the skin. It is difficult to get acquainted with, and the oily layer tends to lift (natural peeling) over time. Also, since oil-based foundations do not contain water themselves, many drawbacks have been pointed out, such as the pigments they contain absorb moisture from the skin's surface, drying out the skin and giving it a flaky feeling. . In order to improve these defects, it is possible to add a moisturizing agent, but the oily base of oily foundations is highly hydrophobic and is not compatible with highly hydrophilic moisturizing agents. Moisturizers, etc. become droplets and separate from the oily base material, causing a so-called sweating phenomenon in which they are liberated on the surface of the foundation. Moreover, the fluidity of the mixture is inhibited, resulting in a significant deterioration of moldability, etc. It has several fatal flaws and has not yet been put into practical use. As a result of intensive research aimed at improving these drawbacks, the present inventors have found that an appropriate amount of a phospholipid surfactant and glycerin or polyethylene glycol having an average molecular weight of 200 coexists in the mixture of the oily base material and the pigment. As a result, the above three components uniformly and stably coexist, resulting in sweating phenomena, changes in hardness, and changes in feel that tend to occur during long-term storage or temperature changes, as well as modulation and inhibition of fluidity during melt molding, and deterioration of moldability. The present invention has been completed based on the discovery that the cosmetic effect can be further improved while providing a good moisturizing effect and a good feeling to the skin. The objects of the present invention are moldability, moisture retention, storage stability,
An object of the present invention is to provide an improved oil-based foundation composition that has excellent (long-term stability), shows little change in hardness due to temperature changes, and provides a good feel and cosmetic effect when used. That is, the present invention comprises 30 to 70% by weight of a liquid oily substance, 5 to 40% by weight of a semi-solid to solid oily substance, 20 to 60% by weight of a pigment, and selected from the group consisting of lecithin and kephalin. An improved oil-based foundation composition comprising 0.2 to 15% by weight of at least one phospholipid surfactant and 0.3 to 10% by weight of glycerin or polyethylene glycol having an average molecular weight of 200. It is. Embodiments of the present invention will be explained in detail below. As the phospholipid surfactants lecithin and kephalin used in the present invention, natural products collected from egg yolk, soybean, milk, cow liver, etc. are usually used. Synthetic products whose chemical structure is substantially the same can also be used. Of course, lecithin and kephalin may be used alone or in combination. The amount (content) of the phospholipid surfactant used is:
0.2-15% by weight relative to the weight of the composition, preferably 0.5
~10% by weight. When it is less than 0.2% by weight, the compatibility of polyhydric alcohol becomes low, and storage stability, moisture retention, moldability, feel, etc. tend to deteriorate, and when it exceeds 15% by weight, the feel becomes poor. In addition, lecithin and kephalin are not only skin nutrients, but also have high compatibility with oily substances.
The specificity of its effects is remarkable, such as stably dissolving polyhydric alcohols that are incompatible with oil-based substances and significantly improving moldability, storage stability, etc. The amount (content) of glycerin or polyethylene glycol with an average molecular weight of 200 is 0.3 to 10% by weight, preferably 1 to 5% by weight, based on the weight of the composition.
Weight%. When it is less than 0.3% by weight, the moisturizing effect, feel, adhesion, etc. tend to deteriorate, and when it exceeds 10% by weight, moldability deteriorates and sweating tends to occur. Liquid oily substances are oily substances for cosmetics that are liquid at room temperature, such as liquid paraffin, squalane, pristane, liquid hydrocarbons such as liquid polyisobutylene, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, and isopropyl. isostearate, decyl oleate, hexyl laurate, diisopropyl sebacate, butyl oleate, butyl myristate,
Ester oils such as almond oil, olive oil, sesame oil, safflower oil, capogado oil, jojoba oil, liquid flour oil such as castor oil, liquid animal oils such as mink oil, egg yolk oil, oleyl alcohol, isostearyl alcohol, octyl alcohol, etc. Liquid higher alcohols such as dodecanol, hexyldecanol, heptylundecanol, oleic acid, isostearic acid,
Examples include liquid higher aliphatic acids such as, and liquid waxes such as liquid lanolin. However, it is not limited to these. The liquid oily substance may be used alone or in combination of two or more. The amount used (content) is usually 30 to 70% by weight, preferably 40 to 60% by weight. Semi-solid or solid oily substances are oily substances for cosmetics that are semi-solid (paste-like) or solid at room temperature, such as vaseline, petrolatum, solid paraffin, ozokerite, microcrystalline wax, etc. Hydrocarbons, waxes such as beeswax, carnauba wax, spermaceti wax, lanolin, hydrogenated lanolin, hard lanolin, high-grade fatty acids such as lauric acid, myristic acid, stearic acid, behenic acid, 12-hydroxystearic acid, lanolinic acid, etc. Examples include fatty acids, higher alcohols such as cetyl alcohol, stearyl alcohol, lauryl alcohol, and lanolin alcohol, and hydrogenated oils such as hydrogenated castor oil. However, it is not limited to these. Semi-solid to solid oily substances may be used singly or in combination of two or more. The amount used (content) is 5 to 40% by weight, preferably 10 to 30% by weight based on the weight of the composition. Examples of pigments include magnesium carbonate, titanium oxide, iron oxide, talc, kaolin, mica, titanium mica, calcium carbonate, magnesium silicate, pentonite, zinc oxide, metallic soap, ultramarine blue,
Examples include chromium hydroxide, chromium oxide, and organic pigments. However, it is not limited to these. The amount of pigment used (content) is based on the weight of the composition.
20-60% by weight, preferably 30-50% by weight. The main components of the oil-based foundation composition of the present invention are as described above, but if necessary, dyes, antioxidants, ultraviolet inhibitors, vitamins or their esters, derivatives, skin nutrients, etc. may be added. Additive used. The oil-based foundation composition of the present invention includes, for example, a liquid oily substance, a semi-solid to solid oily substance,
A method such as mixing and adding a phospholipid surfactant and glycerin or polyethylene glycol with an average molecular weight of 200, then adding, dispersing, and kneading a pigment to this mixed melt, then adding a fragrance, and uniformly mixing. It is prepared as it is (directly) or after cooling and remelting and flowing into a suitable container or mold container and molded into a product. In the oil-based foundation of the present invention, glycerin or polyethylene glycol having an average molecular weight of 200, which is completely incompatible with the oil-based substance (oil-based base material), is uniformly contained in the oil phase due to the coexistence of the phospholipid surfactant. They are stably compatible, and the synergistic action of the two prevents fluidity changes during melt molding and sweating during storage, and improves moldability, storage stability, feel and adhesion during use, etc. Are better. Examples will be described below. In addition, parts shown in Examples mean parts by weight, and % means weight %. Example 1 1 Composition

[Table] 2 Manufacturing method After mixing the required ingredients in A in Table 1, add the pigment mixture in B to the molten mixture heated to 90°C with stirring, mix well, and then add the fragrance in C. were added and mixed to obtain oil-based foundations of the present invention and Comparative Examples 1 to 3. 3. Viscosity during melting, surface condition of molded products, hardness of molded products, and perspiration test (1) Temperature and viscosity of melted products 100℃ of each melted oil foundation,
The viscosity at 90°C, 80°C, and 70°C was measured using a B-type viscometer. The results are shown in Table 2.

[Table] (2) Surface condition of molded products Melt of each oil-based foundation (90℃)
The surface condition of each molded product obtained by cooling the molded product was observed with the naked eye. The result is the third
Shown in the table. Table 3 Oil-based foundation Surface condition Product of the present invention The surface is extremely smooth Comparative example 1 The surface is convex with wavy parts 〃 2 The surface is curved in a concave shape 〃 3 Same as above (3) Each of the molded products Hardness at temperature The hardness of each molded product at 10°C, 20°C, 30°C, and 40°C was measured using a card tension meter. The results are shown in Table 4.

[Table] (4) Sweating property of molded products The sweating state (droplet generation state) on the surface of each molded product at 30°C and 40°C was investigated. The results are shown in Table 5.

[Table] Sweat Sweat Sweat
4 Practical test Each of the above foundations (molded products) was tested by women.
A practical test was conducted by 25 panelists.
The results are shown in Table 6.

[Table] As is clear from the above results, the oil-based foundation of the present invention has a small viscosity change due to temperature during melt molding, good moldability, and a smooth surface due to the combined addition of lecithin and glycerin. A molded product can be easily obtained, and the molded product does not change in hardness due to temperature and does not sweat even at relatively high temperatures. Furthermore, in practical tests (sensory tests), it was excellent in terms of smoothness, soft feel, moisturizing feel, etc., and can provide a good feeling and moisturizing effect when used. Example 2 Except for using kephalin instead of lecithin,
An oil-based foundation of the present invention was obtained in the same manner as in Example 1. On the other hand, as Comparative Example 4, the same procedure as Comparative Example 2 of Example 1 was carried out except that kephalin was used instead of lecithin. The results of each oil-based foundation obtained are shown in Tables 7 to 11. Table 7: Temperature and viscosity temperature of melt (°C) Inventive product Comparative example 4 100 1200 cps 400 cps 90 〃 〃 80 1300 〃 70 1700 500 Table 8: Surface condition of molded product Oil-based foundation Surface condition Inventive product The surface is extremely smooth Comparative Example 4 The surface is concavely curved Table 9: Temperature at which the hardness changes depending on the temperature of the molded product (°C) Inventive product Comparative Example 4 10 18 27 20 12 17 30 11 10 40 9 6 Table 10: Temperature change of molded product and sweating temperature (°C) Invention product Comparative example 4 30 No sweating No sweating 40 〃 Slight sweating Table 11: Practical test (1) Smoothness Invention product Comparative example 4 Very good 10 3 Good 14 11 Fair 1 9 Poor 0 2 (2) Soft feeling Very good 6 2 Good 16 8 Fair 3 12 Bad 0 2 (3) Moist feeling Very good 14 3 Good 9 9 Fair 2 10 Bad 0 3 As is clear from the above results and the results of Example 1, when kephalin and glycerin are added together, melt molding is similar to when lecithin and glycerin are added together. To obtain an oil-based foundation that shows little change in viscosity during use, has good moldability, does not cause perspiration even at relatively high temperatures, and can provide good feeling and moisturizing effect during use. Comparative Examples 5 to 6 Instead of lecithin, the related compound polyoxyethylene cetyl ether sodium phosphate (number of moles of ethylene oxide added = 3) (referred to as Comparative Example 5),
Example 1 except that each of sodium polyoxyethylene oleyl ether phosphate (number of added moles of ethylene oxide = 16) (referred to as Comparative Example 6) was used.
This was carried out in the same manner as in the present invention. Table 12 shows the results.
Shown in Table 16.

【table】 Table 13: Surface condition of molded products Surface condition Comparative example 5 The surface is convexly curved and has wavy parts. Comparative example 6 The surface is convexly curved Example 1 (present invention) Extremely smooth surface

【table】

[Front] Sweat

[Table] As is clear from the above results, it is the same as the present invention (Example 1) except that the related compound polyoxyethylene cetyl ether sodium phosphate or polyoxyethylene oleyl ether sodium pinate is used instead of lecithin. The obtained oil-based foundation is not only bad in molding and prone to sweating, but also inferior in feel when used, etc., compared to the lecithin and kephalin of the present invention. , a significant difference was observed in the effects of both compounds. Example 3 An oil-based foundation of the present invention was obtained in the same manner as in Example 1 except that polyethylene glycol having an average molecular weight of 200 was used instead of glycerin. The results (performance) of the obtained oil-based foundations are shown in Tables 17 to 21 below. Example 4 An oil-based foundation of the present invention was obtained in the same manner as in Example 1, except that polyethylene glycol with an average molecular weight of 200 was used instead of glycerin, and kephalin was used instead of lecithin. . The results (performance) of the obtained oil-based foundations are shown in Tables 17 to 21. Table 17: Temperature and viscosity temperature of melt (℃) Example 3 Example 4 100 1250 cps 1300 cps 90 〃 〃 80 1350 1400 70 1750 1800 Table 18: Surface condition of molded product Oil-based foundation Surface condition Example 3 The surface is extremely smooth Example 4 Same as above Table 19: Temperature of change in hardness due to temperature of molded product (°C) Example 3 Example 4 10 17 18 20 11 12 30 10 11 40 8 9 Table 20: Temperature of molded product Changes and sweating temperature (℃) Example 3 Example 4 30 No sweating No sweating 40 Same as above Same as above Table 21: Practical test (1) Smoothness Example 3 Example 4 Very good 11 10 Good 13 14 Fair 1 1 Poor 0 0 (2) Soft feeling Example 3 Example 4 Very good 7 7 Good 16 17 Fair 2 1 Poor 0 0 (3) Moist feeling Very good 15 16 Good 9 8 Fair 1 1 Bad 0 0 As is clear from the above results and the results of the present invention in Example 1, instead of glycerin, an average molecular weight of 200
When using polyethylene glycol and adding it in combination with lecithin or kephalin, as in the present invention of Example 1, there is little change in viscosity during melt molding, good moldability, and it can be used at relatively high temperatures. It is possible to obtain an oily foundation that does not cause sweating even when used, and can provide a good feeling and a moisturizing effect when used.

Claims (1)

[Claims] 1 Liquid oily substance is 30-70% by weight, semi-solid to solid oily substance is 5-40% by weight, and pigment is 20-70% by weight.
60% by weight, 0.2 to 15% by weight of at least one phospholipid surfactant selected from the group consisting of lecithin and kephalin, and 0.3 to 10% by weight of glycerin or polyethylene glycol having an average molecular weight of 200. An improved oil-based foundation composition characterized by: