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The present invention has good adhesion to the lips (no twisting or wobbling), abrasion resistance (does not stick to fingers, etc.),
This invention relates to a water-in-oil type emulsified stick lipstick (hereinafter referred to as W/O type lipstick for convenience) that has excellent bending strength, water retention, spreadability when applied to the skin, and moldability (mold release properties). Conventionally, emulsified stick cosmetics have been made by adding surfactants, glycerin, and oily ingredients to the base material.
Some products are manufactured by mixing a gel made of mannitrate, fructose, etc., and then water, but these have poor adhesion to the lips, abrasion resistance, spreadability when applied, and releasability during molding. I'm still not satisfied with it. (Specification of British Patent No. 1442426, Specification of West German Patent Application No. 2335549) As a result of intensive research aimed at improving this drawback, the present inventors found that the water-in-oil type (W/
Type O) lipsticks have a butter-like feel, do not cause resistance to the lips, provide emollient properties to the lips, and allow the addition of water-soluble active ingredients and natural pigments. The present invention was finally completed based on the discovery that the adhesive agent has excellent adhesion to the surface, abrasion resistance, elongation during coating, and releasability during molding. The objectives of the present invention are to have good adhesion to the lips (no wobbling or wobbling), abrasion resistance (hard to stick to hands and fingers), bending strength, water retention, elongation when applied to the skin, and release when molded. To provide a water-in-oil type lipstick with outstanding moldability. That is, the present invention is a W/O type lipstick characterized in that it is made by adding and mixing an aqueous maltitol solution to a mixture of sorbitan oleate and an oily substance or pigment, and emulsifying the mixture. As the sorbitan oleate ester contained in the W/O type lipstick of the present invention, sorbitan monooleate, dioleate, and sesquiolate are suitable, and monooleate (monoester) and sesquiolate (sesquiester) are particularly preferred. They are used alone or in combination, and their content is from 0.1 to 10% by weight, preferably from 1 to 5% by weight, based on the weight of the composition. If it is less than 0.1% by weight, stability, water resistance, and mold release properties during molding will decrease, and if it is more than 5% by weight, bending strength, lip adhesion, and abrasion resistance will tend to decrease. The oily substance is a general term for known oily base materials for lipsticks, and refers to oils and fats, waxes, liquid hydrocarbons, ester oils, higher fatty acids, etc. For example, waxes include castor oil, cacao oil, and wood. Oils and fats such as wax,
Whale wax, lanolin, beeswax, carnauba wax,
Waxes such as Candelilla wax, hydrocarbons such as paraffin wax, petrolatum, squalene, higher alcohols and polyhydric alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, methyl stearate, isopropyl myristate, lanolin fatty acids isopropyl ester,
Examples include, but are not limited to, esters such as butyl stearate, oleyl oleate, myristate misacetoglyceride, and fatty acids. Oils and fats, waxes, hydrocarbons commonly used in cosmetics,
Any fatty acid, higher alcohol, polyhydric alcohol, ester, etc. can be used as appropriate. These oily substances are used alone or in appropriate combinations, and their content ranges from 30 to 30% based on the weight of the composition.
90% by weight, preferably 50-70% by weight. When the amount is less than 30% by weight, stability decreases, and when it is more than 90% by weight, the above-mentioned effects tend to decrease. Organic pigments, inorganic pigments, and dyes are used as pigments, but in particular in the present invention, since they contain a relatively large amount of water, a wide range of new dyes such as natural pigments and food colors can be effectively and appropriately selected and used. It is also extremely easy to adjust the hue. Note that water-soluble dyes and the like may be added after being dissolved in an aqueous maltitol solution, which will be described later. When mixing maltitol, it is preferable to use it as an aqueous solution. The content of maltitol is 1 to 25% by weight, preferably 3 to 15% by weight based on the total amount of the composition. If it is less than 1% by weight, the stability, water retention, bending strength, mold release properties when applied to the skin, adhesion to the lips, and mold release properties will decrease, and if it is less than 25% by weight. When the amount increases, water resistance, adhesion to lips, and abrasion resistance tend to deteriorate. Water is added as an aqueous sorbitol solution, and the amount used is 1 to 50% by weight, preferably 5 to 20% by weight, based on the weight of the composition. If it is less than 1% by weight, the adhesion to the lips, spread when applied to the lips, releasability during molding, etc. tend to decrease, and if it exceeds 50% by weight, stability, etc. tend to decrease. The W/O type lipstick of the present invention can be manufactured by various methods, one of which is to add an aqueous maltitol solution to a mixture of the required amount of the sorbitan oleate and an oily substance or pigment. This is done by addition mixing with stirring. In this case, water-soluble dye, maltitol aqueous solution,
A water-soluble drug (active ingredient) may be added and mixed in a dissolved form. If necessary, polyvalent metal ion sequestering agents, known cosmetic UV inhibitors, and preservatives may be mixed with the mixture of sorbitan oleate and oil-based substances or pigments, or with the maltitol aqueous solution. . Although the liquid temperature during stirring and mixing is not particularly limited, it is preferably 60 to 95°C, most preferably 70 to 85°C.
It is. If the temperature during mixing is too low, uniformly dispersed waxes may precipitate, or coarse oil particles may be easily released partially, and if the temperature is too high, the components may easily decompose or change in quality. There are cases. After mixing and emulsifying and dispersing, the mixture is gradually cooled to room temperature. Incidentally, it is preferable to add fragrances, drugs that are unstable at high temperatures, etc. during this cooling process. The W/O type lipstick composition of the present invention, which has been cooled and taken out from a mixer such as a kneader, may be placed in a suitable cosmetic container (when applied to the lips with a brush).
Alternatively, it may be placed in a molding machine and molded by a conventional method. The W/O type lipstick composition of the present invention has extremely good mold releasability during molding due to the coexistence effect of maltitol and sorbitan oleate. One of the features of the present invention is that it is significantly superior to the case of additive mixing, and no defective molding products are observed. The W/O type lipstick composition of the present invention forms a water-in-oil type homogeneous and stable emulsion system, exhibits a butter-like feel, does not give a feeling of resistance to the lips, and provides emollient properties to the lips when used. In addition, it is not only easy and possible to add water-soluble active ingredient drugs and non-toxic vivid natural pigments, but also improves adhesion to the lips, abrasion resistance, elongation during use, and mold release during molding. is significantly superior (for example, compared to the case where a sorbitol surfactant-based gel is added and mixed), and its industrial production does not require any preparation of the gel and can be easily carried out using ordinary mixing methods. It can be easily prepared and released from the mold during molding without producing defective molded products, and its commercial value and industrial significance are extremely high. Such useful and remarkable effects are due to the combined use of maltitol and sorbitan oleate and the mixing means, and will become clearer from the Examples described below. Examples of the present invention will be described below. In the examples, % means % by weight, and parts means parts by weight. Example 1 In a homomixer, 9.0 parts of Carnaupawax,
Solid paraffin 7.0 parts, micro wax 5.0 parts,
9.0 parts lanolin, 15.0 parts castor oil, 18.0 parts squalane
part, sorbitan monooleate 3.0 parts, titanium oxide
Add 4.0 parts, red red 1.0 part, and 2.0 parts of Red No. 202 (dye), heat to 80°C, and stir to dissolve. While stirring this solution (the pigment is dispersed) at 80â,
An aqueous solution (80°C) consisting of 7.0 parts of maltitol and 20 parts of water was added and mixed to emulsify it, and when the temperature was lowered to 70°C, an appropriate amount of fragrance was added. This lipstick composition forms a water-in-oil emulsion system. Next, pour this into a lipstick mold (temperature 70
â), and was cooled and molded into a stick shape (diameter 12.5 mm), which was easily released from the mold. There were no defective molded products (products with missing edges or edges) among the 50 samples. The obtained W/O type lipstick of the present invention (present invention-1) forms a stable water-in-oil type emulsion system, has a butter-like feel and deep gloss, and has a smooth texture on the lips. There was no sense of resistance, it spread well, and remained stable with no changes observed even after 6 months. It also provides emollient properties to the lips and prevents them from becoming chapped. In addition, it has good adhesion to the lips, does not twist or move, and has good abrasion resistance and does not easily adhere to hands and fingers. Furthermore, the bending strength was measured indoors at 30°C and relative humidity of 65%, and the average value of 10 samples was 260g. In addition, a W/O type lipstick of the present invention-2 was produced in the same manner as the present invention-1 except that sorbitan sesquiolate was used instead of sorbitan monooleate. The obtained lipstick forms a W/O type emulsion system, has a deep luster and butter-like feel, does not feel resistant to the lips, spreads well, and remains stable with no change after 6 months. The characteristics were also good. It also imparted emollient properties to the lips and prevented chapped lips. In addition, it has good adhesion to the lips, does not twist or move, and has good abrasion resistance and does not easily adhere to hands and fingers. In addition, the bending strength was similarly measured.
It was 250g. When molded into sticks, the mold releasability was good and no molding defects were observed among the 50 samples. Also for comparison, Carnauba Wax 9.0
part, solid paraffin 7.0 parts, microwax 5.0 parts
9.0 parts of lanolin, 15.0 parts of castor oil, 18.0 parts of squalane, 4.0 parts of titanium oxide, 1.0 parts of red iron oxide, and 2.0 parts of red dye No. 202 were heated to 80°C. To each solution, 7.0 parts of sorbitol and sorbitan mono A gel consisting of 3.0 parts of oleate and 7.0 parts of water, or a gel consisting of 7.0 parts of sorbitol, 3.0 parts of sorbitan sesquiolate, and 7.0 parts of water is mixed separately at 80°C, and then mixed with 17 parts of water to emulsify. was carried out in the same manner as in Invention 1 above. As a result, the lipstick containing sorbitol-sorbitan monooleate gel (Comparison-1) was relatively difficult to release from the mold, and 12 out of 50 samples had molding defects, and the bending strength was 170 g. A bleed phenomenon occurred one week later. In addition, a lipstick containing one sorbitol-sorbitan sesquiolate gel (Comparison-2)
Also, 13 out of 50 samples had molding defects due to difficulty in releasing the mold.
The bending strength of the book was 160 g, and bleeding occurred one week after production. These sample lipsticks were also tested for use by a panel of 20 people (female ages 20 to 30). The results are shown in Table 1.
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çïŒãããå£ã€ãŠããã[Table] As is clear from the above results, the W/
All O-type lipsticks are superior in physical properties, performance, and moldability compared to gel-mix emulsified lipsticks. Example 2 Candelilla wax 8 parts, Ozokerite 10 parts
2 parts microwax, 5 parts lanolin, 3 parts petrolatum, 18 parts oleyl alcohol, 22 parts liquid paraffin, 4 parts titanium oxide, 0.2 parts red iron, 2.8 parts Red No. 204 and 5 parts sorbitan monooleate or sorbitan sesquiolate. A mixture consisting of 5 parts
After dissolving at 80°C, a solution (80°C) consisting of 10 parts of maltitol and 17 parts of purified water was added to each mixed solution, mixed, and emulsified. Summer. As a result, a lipstick containing sorbitan monooleate and maltitol (the present invention)
3) and the lipstick containing sorbitan sesquiolate and maltitol (present invention-4) both form a uniform and stable W/O type, have a butter-like feel, and do not cause any resistance (uncomfort) to the lips. It had a deep luster and remained stable without any abnormalities after 6 months. It also had emollient properties, and had good adhesion to the lips and abrasion resistance. Furthermore, the lipstick was easily released from the mold during molding, and no molding defects were observed. In addition, the bending strength of lipstick containing sorbitan monooleate and maltitol is
The bending strength of the lipstick containing sorbitan sesquiolate and maltitol was 270 g. Example 3 9 parts carnauba wax, 7 parts solid paraffin
After dissolving at 80°C a mixture consisting of 5 parts of microwax, 9 parts of lanolin, 15 parts of castor oil, 18 parts of squalane, 5 parts of mixed pigment, and 3 parts of sorbitan monooleate or 3 parts of sorbitan sesquiolate. To each of these mixed solutions, an aqueous solution (80°C) consisting of 7 parts of maltitol, 20 parts of purified water, and 0.02 part of a water-soluble detergent was added, mixed, and emulsified, but in the same manner as in Example 1. I went to As a result, a lipstick containing sorbitan monooleate and maltitol (present invention-5) and a lipstick containing sorbitan sequisuoleate and maltitol (present invention-5) were obtained.
6) both form a homogeneous W/O type emulsion system, have a deep gloss and butter-like feel, have no resistance to the lips, and show no abnormalities even after 6 months and are stable. was in good condition. Furthermore, it was easy to release from the mold when molded into a stick, and no molding defects were observed among the 50 samples. Further, the folding strength of the W/O type lipstick of the present invention-5 was 265 g, and the folding strength of the W/O type lipstick of the present invention-6 was 250 g. Comparative Example 1 The same procedure as in Invention-1 of Example 1 was carried out except that sorbitan monostearate or glycerol monooleate was used instead of sorbitan monooleate. The peeling strength of an emulsified lipstick (containing sorbitan monostearate and maltitol) using sorbitan monostearate instead of sorbitan monooleate was 155 g/12.5 mm, and 13 out of 50 samples had molding defects. It was a book, and its adhesion to the skin and abrasion resistance were also inferior to the products of the present invention. Also, the bending strength of emulsified lipsticks that use glycerol monooleate instead of sorbitan monooleate (containing glycerol monooleate and maltitol) is
At 160 g/12.5 mm, 12 out of 50 samples had defective molding, and the skin adhesion and abrasion resistance were also inferior to the products of the present invention. Comparative Example 2 A comparative W/O type lipstick was obtained in the same manner as in Invention-1 of Example 1, except that sorbitol monooleate was used instead of sorbitan monooleate. The bending strength of this lipstick is weak at 150g/125mm.
There were 13 out of 50 samples with defective molding, and the adhesion to the skin (7 people) and abrasion resistance (6 people) were also inferior to the product of the present invention (Invention-1). Comparative example 3 7.0 parts of sorbitol and sorbitan monooleate
Instead of a gel consisting of 3.0 parts and 7.0 parts of water, 7.0 parts of maltitol, 3.0 parts of sorbitan monooleate, and water
The same procedure as Comparison-1 described in Example 1 above was conducted except that a gel containing 7.5 parts was used. As a result, the bending strength of the obtained W/O type lipstick was weak at 140g/12.5mm, 14 out of 50 samples had molding defects, and the adhesion to the skin (6 people) and abrasion resistance (6 people) human) was inferior to the products of the present invention (1st and 2nd grade of the present invention). Comparative example 4 Maltose (maltose) instead of maltitol
The same procedure as in Example 1 of the present invention-1 was carried out except that . As a result, the bending strength of the obtained W/O type lipstick was weak at 135 g/12.5 mm, 16 out of 50 samples had molding defects, and the adhesion to the skin (6 people) was poor.
The abrasion resistance (6 people) was also higher than that of the present invention (1 to 2 of the present invention).
etc.) was inferior to