JPH06279236A - Modified wax and cosmetic containing same - Google Patents

Abstract

PURPOSE:To provide a modified wax useful as a solidifying agent excellent in an ability of solidifying polar oiling agents, increasing the strength of a cosmetic compounded with the solidifying agent, and not causing sweating and powdering of the cosmetic with the lapse of time, and to provide its use. CONSTITUTION:There are provided a modified wax produced by dissolving candelilla wax and carnauba wax and subsequently subjecting the mixture to an esterification reaction to reduce free acids and free alcohols, and a cosmetic containing the same.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modified wax excellent in solidifying ability of a polar oil agent and its use. More specifically, it relates to a modified wax obtained from a mixture of candelilla wax and carnauba wax and a wax containing the modified wax. It relates to cosmetics that do.

[0002]

2. Description of the Related Art Conventionally, for cosmetics such as lipsticks, castor oil, glycerin fatty acid derivatives, lanolin derivatives, polar oils such as natural oils and natural waxes such as candelilla wax, carnauba wax and bees wax, ozokerite, Hydrocarbon wax such as ceresin wax,
A solidifying agent such as a synthetic hydrocarbon wax such as polyethylene wax is used together.

The polar oil agent has a hydroxyl group in its molecule,
Since it contains a polar moiety such as a carboxyl group, it has the effect of improving the adhesion to the skin and the emollient property. Further, natural waxes such as candelilla wax, carnauba wax and beeswax are preferable for solidifying such a polar oil agent, and particularly candelilla wax containing hydrocarbon and ester in good balance is known to be effective. ing.

[0004]

However, although candelilla wax is effective as a solidifying agent for polar oils, it contains free acids, free alcohols, resins, etc., and therefore, cosmetics containing it cannot be treated with time. Sweating,
There was a problem of producing dust. In castor oil-based lipsticks, candelilla wax is particularly effective as a solidifying agent, but has poor hardness retention at high temperatures and is used in combination with carnauba wax. However, carnauba wax is poorly soluble, and if it is mixed in a large amount, the strength of lipstick will be decreased. With respect to the decrease in strength, when the amount of solid wax is increased, the strength is increased, but the solid content of the lipstick is increased, and the spread tends to be heavy and the gloss tends to deteriorate. Therefore, as a solidifying agent for a polar oil agent, a solidifying agent which is excellent in solidifying ability and whose strength is increased and which does not cause perspiration or dusting over time is desired in a cosmetic composition.

The present invention has been made in view of the above problems of candelilla wax and carnauba wax as a solidifying agent for polar oil agents, and an object thereof is excellent in solidifying ability of polar oil agents. In the blended cosmetics,
It is an object of the present invention to provide a modified wax as a solidifying agent which has increased strength and does not cause perspiration or powdering over time and its use.

[0006]

Means for Solving the Problems The inventors of the present invention have made extensive studies on the solution of the above-mentioned problems. As a result, candelilla wax in which free acid and free alcohol contained in carnauba wax are reduced by an esterification reaction. A modified wax consisting of a mixture of wax and carnauba wax is excellent in the solidifying ability of a polar oil agent, and a cosmetic composition containing this has an increased strength and suppresses perspiration, dusting, etc. over time, and has a feeling of use. It was found to be excellent.

The present invention is based on the above findings and ideas, and the gist thereof is to dissolve and mix candelilla wax and carnauba wax, and heat to cause an esterification reaction to produce a free acid and a free alcohol. A modified wax characterized by being reduced, and a cosmetic characterized by using this as a main ingredient.

In the present invention, the candelilla wax and carnauba wax used as raw materials are not particularly limited as long as they are usually used in cosmetics, and have the physical properties shown in Table 1, for example. If the candelilla wax from which the resin component of the candelilla wax is removed (Japanese Patent Laid-Open No. 2-150496) is used, the effect of the present invention becomes more excellent.

[0009]

[Table 1] Physical properties of wax used

The modified wax according to the present invention can be obtained by esterifying a free acid and a free alcohol contained in each wax by a normal esterification reaction of candelilla wax and carnauba wax. That is, in order to produce the modified wax according to the present invention, for example, candelilla wax and carnauba wax are used from 9: 1 to 9: 1.
It is dissolved and mixed at a ratio of 7: 3, and then an appropriate amount of acid is added, or after heating under reduced pressure (500 mmHg or less, preferably 1 to 50 mmHg) at 80 ° C to 220 ° C for esterification. For this esterification reaction, a method of heating under reduced pressure after adding an appropriate amount of acid is also preferable. When the candelilla wax from which the resin component has been removed is used, the modified wax can also be produced by a method of heating under reduced pressure and esterification without adding an acid. By this esterification reaction, the free acids and free alcohols in the raw materials candelilla wax and carnauba wax are esterified to obtain a modified wax. Then, the obtained reaction product is washed with hot water to be neutral, and dried to obtain a product.

The cosmetics according to the present invention include lipsticks, lip balms, eye shadows, eye liners, mascaras,
Although it is a foundation, etc., using the modified wax obtained by the above-mentioned production method as a solidifying agent, from powders, semisolid oils, liquid oils and the like which are usually used as cosmetics,
It can be manufactured according to a usual method. The modified wax according to the present invention contains 1 to 40% by weight, especially 5% by weight of the total composition.
It is preferable to add 30 to 30% by weight. Further, as a solidifying agent, a solid wax used in ordinary cosmetics can be used in combination.

The powder is not particularly limited as long as it can be used for ordinary cosmetics. For example, talc, mica, kaolin, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, calcium silicate, titanium oxide, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, sunflower, conger, tar pigment, natural pigment , Titanium mica, titanium iron oxide mica, bismuth oxychloride, nylon powder, silk powder and the like can be used.

The semi-solid oil and the liquid oil are not particularly limited as long as they are usually used in cosmetics. For example, liquid paraffin, hydrocarbon oil such as petrolatum, ester oil such as isopropyl myristate, silicone oil such as methylpolysiloxane and methylphenylpolysiloxane, and naturally extracted oil such as olive oil, jojoba oil, mink oil and the like can be used. it can.

The cosmetics of the present invention further include resins, polymers, surfactants, higher alcohols, dyes, fragrances, humectants, preservatives, beauty agents, antioxidants, and ultraviolet rays which are used in ordinary cosmetics. Absorbents, solvents and the like can be added within a range that does not impair the effects of the present invention.

[0015]

The present invention will be described in more detail based on the following examples. Example 1. Candelilla Wax: Carnauba Wax Manufacturing Method of Modified Wax 9: 1 Carnauba Wax is dissolved and mixed at a ratio of 10% to 90% of Candelilla wax, and then 0.01 to 0.3.
After adding concentrated sulfuric acid in a proportion of 80%, the mixture is added to 80-12.
The mixture is heated to 0 ° C., and the free fatty acid and free alcohol of both waxes are reacted for 1 to 24 hours, preferably 4 to 12 hours. The obtained reaction product was washed with hot water several times to make it neutral.
The reaction rate was about 35%.

Example 2. Candelilla wax with resin removed: Carnauba wax 8: 2 modified wax production method Compared to 80% of candelilla wax without resin,
Carnauba wax is dissolved and mixed in a ratio of 20%, heated to a temperature of 80 to 220 ° C., preferably 160 to 220 ° C. and reduced under a pressure of 500 mmHg or less, preferably 1 to 50 mmHg, for 1 to 24 hours, preferably 3 React the free fatty acids and free alcohols of both waxes for ~ 6 hours.
The resulting reaction product was washed with hot water several times. Reaction rate is about 50%
Met.

Comparative Example 1. Candelilla wax and carnauba wax are dissolved in a ratio of 9: 1 to obtain a mixture. Comparative example 2. The candelilla wax and the carnauba wax from which the resin components have been removed are dissolved in a ratio of 8: 2 to obtain a mixture. Table 2 shows a comparison of properties between the modified waxes obtained in Examples 1 and 2 and the mixture of candelilla wax and carnauba wax obtained in Comparative Examples 1 and 2.

[0018]

[Table 2]

As is clear from Table 2, in Examples 1 and 2, as compared with Comparative Examples 1 and 2, an increase in melting point, a decrease in acid value, an increase in saponification value, and a hydrocarbon distribution were examined. By the way
Since the number of esters having about 60 carbon atoms, which was almost absent in Comparative Examples 1 and 2, increased considerably in Examples 1 and 2, it can be seen that the free acid decreased and higher esters were produced.

Examples 3-5 and Comparative Examples 3-4 Lipsticks The modified waxes obtained in Examples 1 and 2 were used in lipstick base formulations and the candelilla wax and carnauba wax obtained in Comparative Examples 1 and 2 were used. The hardness and the degree of sweating were evaluated as the physical properties, and the sliding feeling at the time of use, the finished film feeling, and the luster were evaluated as the physical properties in comparison with those using the mixture. The results are shown in Table 3.

Evaluation method Hardness: The sample was left standing at 25 ° C. and the penetration was measured the next day. Penetration measurement conditions ・ Rheometer NRM-2002D (Fudo Kogyo Co., Ltd.) ・ Needle diameter 2 mm ・ Speed 60 m / min Sweating; Molded product is heated from room temperature to 50 ° C (1 ° C / min)
The perspiration state of the stick surface when the sticks were made to be observed. ◎: No apparent sweating ○: Slight sweating △: Considerable sweating ×: Vigorous sweating Slide feeling, film feeling, luster; 30 panel women tested for use The following criteria were evaluated and judged. Evaluation point 3 points: Very good 2 points: Normal 1 point: Poor judgment ◎: Average score of 2.5 or more ○: Average score of 2.0 or more and less than 2.5 △: Average score of 1.5 or more and less than 2.0 × : Average score less than 1.5

[0022]

[Table 3] (Note 1) Component composition is shown in%. (Note 2) Manufacturing method: Components 1 to 10 are mixed, heated and dissolved, and then filled and molded.

As is clear from Table 3, in the case of Examples 3 and 4 using the modified wax according to the present invention, the hardness was higher than that of Comparative Examples 3 and 4 using the mixture of candelilla wax and carnauba wax. It was possible to obtain a product with a high value and to suppress the sweating on the surface. Also, hardness enough to use
To obtain (in this case 250-260 g)
Since the amount of the wax as the solidifying agent can be reduced as described above, a lipstick excellent in usability such as sliding feeling, film feeling and luster could be obtained.

Example 6 and Comparative Example 5. Pencil Eyeliner The modified wax obtained in Example 2 was used in the formulation of a pencil eyeliner and compared to the mixture of the candelilla wax and carnauba wax obtained in Comparative Example 2, The breaking strength and the degree of dusting with time were evaluated. The results are shown in Table 4.

Bending strength and evaluation method of degree of powdering with time Bending strength: Bending strength at 35 ° C. was measured. Bending strength measurement conditions-Rheometer NRM-2002D (made by Fudo Kogyo Co., Ltd.)-Speed 6 cm / min dusting; When the pencil eyeliner is left at 10 ° C to 40 ° C (1 cycle / 2 days) for 1 month The state of dusting on the pencil surface of was observed. ◎: No clear dusting ○: Slight dusting △: Significant dusting ×: Vigorous dusting

[0026]

[Table 4] (Note 1) Component composition is shown in%. (Note 2) Manufacturing method A: 1 to 8 are dissolved by heating. B: Add 9 to A and disperse uniformly. C: B is molded to obtain a pencil-shaped eyeliner with a diameter of 3 mm.

As is clear from Table 4, the pencil eyeliner of Example 6 using the modified wax according to the present invention has a bending strength higher than that of Comparative Example 5 using a mixture of candelilla wax and carnauba wax. It was possible to obtain a powder having a high value and suppress the generation of dust on the surface over time.

Example 7. Lipstick A lipstick was produced according to the following formulation. The manufacturing method is 1 in the prescription
~ 7 is heated to dissolve and 8-10 in the formulation in this melt.
Was added, kneaded, dissolved, and then filled and molded to obtain a lipstick. The lipstick using the modified wax according to the present invention obtained here has a light spread and is excellent in the feeling of use, has a thin film, is glossy and has a beautiful finish, and does not cause sweating or dusting.

Formulation (Ingredient composition is expressed in%) 1. Modified wax obtained in Example 1 22.0 Ceresin wax 2.0 3. Lanolin 10.0 4. Glycerin fatty acid ester 15.0 5. Flower oil 10.0 6. Silicone oil 3.0 7. Castor oil balance 8. Mica proper amount 9. Titanium oxide proper amount 10. Coloring pigment proper amount

[0030]

The modified wax according to the present invention is manufactured by dissolving and mixing candelilla wax and carnauba wax and reducing free acid and free alcohol by an esterification reaction. It has excellent solidification ability. Therefore, the cosmetic composition according to the present invention containing this composition can provide a cosmetic composition excellent in usability such as sliding feeling, film feeling, and gloss, since the amount of wax as a solidifying agent is small. At the same time, it is possible to suppress perspiration and dusting over time.

Claims (6)

[Claims] 1. A modified wax characterized in that candelilla wax and carnauba wax are dissolved and mixed, and an esterification reaction is carried out to reduce free acids and free alcohols. 2. A modified wax characterized in that candelilla wax and carnauba wax are dissolved and mixed, an acid is added, and then heated to cause an esterification reaction to reduce free acid and free alcohol. 3. A modified wax characterized in that candelilla wax and carnauba wax are dissolved and mixed and heated under reduced pressure to cause an esterification reaction to reduce free acids and free alcohols. 4. A candelilla wax and carnauba wax are dissolved and mixed, an acid is added, and the mixture is heated under reduced pressure to effect an esterification reaction to reduce the free acid and free alcohol. Modified wax. 5. The modified wax according to claim 1, wherein the candelilla wax is a candelilla wax from which a resin component has been removed. 6. A cosmetic comprising the modified wax according to any one of claims 1 to 5.