JPH01207223A - Solid cosmetics - Google Patents

Abstract

PURPOSE:To obtain a solid cosmetic having excellent stability, safety and good feeling on application by combining an N-acylamino acid amide with starch fatty acid ester to set the liquid oil into a solid by gelation. CONSTITUTION:The subject solid cosmetic is composed of (A) an N-acylamino acid amide such as n-lauroyl-L-glutamic acid-alpha,gamma-di-n-butylamide, (1-10wt.%), (B) a starch fatty acid ester (starch hydrolysate of 10-50 average polymerization degree is esterified with a fatty acid) (1-25wt.%) and (C) a liquid oil containing more than 30wt%. of a polar liquid oil such as glyceryl trioctanoate, methylphenylpolysiloxane (40-95wt.%) as essential components. The cosmetic can be readily transferred to the applicator such as a brush, gives smooth feeling on application without rigid touch, moreover, having excellent gloss and clarity.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to solid cosmetics, and more specifically, the present invention relates to solid cosmetics, and more specifically, to gelling liquid oils by using N-acylamino acid amide and starch fatty acid ester together as gelling agents. The present invention relates to solid cosmetics that are made of solid cosmetics, have an excellent appearance, and are excellent in stability, feel, and the like.

[Prior Art] Conventionally, solid cosmetics have generally been formulated with wax, which is a type of solid oil. Wax is important in maintaining the shape of solid cosmetics and is widely used, but in such cosmetics, the hardness and weight derived from the wax create a feeling of spreadability and smoothness when applied. It was also difficult to obtain a product with a transparent appearance.

Oil gelling agents are also used to compensate for the shortcomings of these waxes and improve their appearance and feel.
In order to obtain a product that is transparent and has a smooth feel,
It is known to use polyamide resin, 12- and droxystearic acid, and the like.

[Problems to be Solved by the Invention] However, when conventional solid cosmetics are blended with an oil gelling agent as described above, they have a better feel compared to solid cosmetics using wax. However, there were problems such as heavy perspiration, insufficient strength, and cloudy appearance even when manufactured with transparent products.

In other words, the reality is that a product with good strength, molding condition, and usability, as well as a fully satisfactory appearance, has not yet been obtained.

[Means for Solving the Problems] As a result of various studies in order to solve the above problems, the present inventors have found that by gelatinizing a liquid oil using a combination of N-acylamino acid amide and starch fatty acid ester, the appearance can be improved. The present inventors have discovered that it is possible to obtain a vine product that has excellent properties and is also fully satisfactory in terms of usability and stability, and has completed the present invention.

That is, the present invention provides a solid cosmetic containing an N-acylamino acid amide, a starch fatty acid ester, and a liquid oil agent as essential components in specific proportions.

The configuration of the present invention will be explained below.

The N-acylamino acid amide used in the present invention is a type of N-acylamino acid derivative, and is used as an oil gelling agent. As a technique applied to cosmetics, a technique described in Japanese Patent Publication No. 53-27776 is known. Specifically, the N-acylamino acid amide includes N-lauroyl-glutamic acid-α, which is a type of dialkylamide of N-acylglutamic acid;
γ-Di-n-butyramide (trade name, Coagulan GP)
-1; manufactured by Ajinomoto Co., Inc.), etc. are used.

The amount of N-acylamino acid amide in the present invention is:
It is used in an amount of 1 to 10% by weight based on the total amount of cosmetics. If it is less than 1% by weight, some effects can be expected, but if it is used in excess of 10% by weight, it is unfavorable in terms of solubility with other essential components.

Next, the starch fatty acid ester used in the present invention is a saturated fatty acid ester of a starch decomposition product having an average degree of polymerization of 10 to 50, such as Leopard KL manufactured by Kaiha Chemical Co., Ltd., and the like.

The amount of starch fatty acid ester used in the present invention is in the range of 1 to 25% by weight based on the total amount of the cosmetic. If it is less than 1% by weight, there is no effect when used in combination with N-acylamino acid amide, and if it is more than 25% by weight, the gel becomes too hard to be used and the transparency of the appearance is significantly lost. I'll get lost.

In addition, the liquid oil agent which is an essential component in the present invention is
N-acyl amino acid amides that have good solubility and form a strong and stable gel are preferred, such as glyceryl trioctanoate, triglyceryl isostearate, diglyceryl triisostearate, diglyceryl distearate, and macadamian nut oil. Particularly suitable are polar liquid oils such as ester oils such as mustard oil, refined jojoba oil, and silicone oils such as methylphenylpolysiloxane. In addition, non-polar oils such as hydrocarbons such as liquid paraffin and squalane have poor solubility in N-acylamino acid amides and are difficult to form stable gels when used alone, but they can be used in combination with the polar liquid oil. As a result, good products can be obtained. In this case, it is necessary to make the proportion of polar liquid oil in the liquid oil agent at least 30% by weight and 61%; if it is less than 30% by weight, a stable gel cannot be formed and the strength may be deteriorated. , which is not desirable.

The amount of liquid oil in the present invention is 40% of the total amount of cosmetics.
It is appropriately selected within the range of 95% by weight. If it is less than 40% by weight, an excellent gel cannot be formed, and if it is less than 95%
Even if it exceeds this, it is not sufficient in terms of strength etc.

The solid cosmetic of the present invention contains the above three components as essential components, and the effects of these components on gel formation, stability, and transparency will be demonstrated.

Samples ① to ② whose compositions are shown in Table 1 were manufactured, molded into stick shapes, and evaluated for gel strength and the presence or absence of sweating.

Judgment criteria ◎: Very good ○: Good △: Fairly bad X: Bad! (Manufacturing method) A (1), (3), (4), (6) at 130-135°C
Dissolve by heating (this step is excluded for sample ①).

Cool BA to 100°C, add (5) and dissolve.

After degassing the CB, it is poured into a mold and cooled.

As is clear from the results in Table 1, when N-acylamino acid amide is not used (sample ■), the strength is extremely low;
The stability was also poor. In addition, when starch fatty acid ester was not used (sample ■), the strength was insufficient, but the sweating was severe, and even when 12- and droxystearic acid were added (sample ■), there was no noticeable effect. . On the other hand, when N-acylamino acid amide and starch fatty acid ester were used together (Samples ■ and ■), the gel strength was excellent, there was no sweating, the stability was the best, and the gel strength was very high. It had a transparent feel. Furthermore, even if N-acylamino acid amide and starch fatty acid ester were used together as a gelling agent, a large amount of liquid paraffin, a non-polar oil agent, entered the liquid oil agent (sample ■).
However, by reducing the amount of liquid paraffin added and using diisostearic acid, which is a polar liquid oil, When the proportion of glyceryl was increased (Sample ■), sweating was less likely to occur and the strength was also very good.

That is, it has been found that gel formation, stability, and transparency are significantly improved by using the essential components of the present invention in specific proportions.

The solid cosmetic according to the present invention contains the above-mentioned N-acylamino acid amide, starch fatty acid ester, and liquid oil in a specific composition ratio, and is used as a stick-shaped or plate-shaped product.

In addition, the solid cosmetic of the present invention is formulated with resins, pigments, fragrances, antioxidants, preservatives, ultraviolet absorbers, etc., depending on the cosmetic purpose and product form, etc., and is prepared to exhibit the effects of the addition. It is possible. For example, pentaerythritol rosin acid, which is a type of resin, improves the transparency when making the solid cosmetic of the present invention into a transparent type, and also improves the usability such as gloss and makeup retention. It can be added in an amount up to 30% by weight based on the total amount of cosmetics.

[Example] Next, the present invention will be further explained by giving examples.

Note that these do not limit the present invention in any way.

Example [11 Stick-shaped lipstick (formulation) (wt%) (1)
N-lauroyl-shi-glutamine 5.5 acid-α, γ
-J-n-butyramide (2) Starch fatty acid ester 6.0 (3)
12- and droxystearic acid 1.5(4) Squalane 5.0(5) Glyceryl trioctanoate 12.516) Diglyceryl triisostearate 53.7(7) Pentaerythritol rosin acid 10.0(8) Antioxidant agent
0.05(9) Preservative
0.0500) Titanium oxide
3.0 (1ri red No. 202
0.302) Red No. 226
1.003) Yellow No. 4 aluminum rake
1.2 (14) Fragrance
0.2 (Production method) A (1), (4), and ('7) are heated and dissolved at 130 to 135°C.

Cool BA to 110°C or less, (2), (3), but)
, (9) is added and dissolved.

Disperse (10) to 03) in CB.

After degassing the DC, add the liquid, pour into a container, and cool.

Comparative example [+] (Formulation) (Weight%) (1)
Microcrystalline wax 10.0 (2)
Sucrose fatty acid ester 13.0 (3)
Rosin acid pentaerythritol 17.0 (4
) Castor oil 9.0 (average
Isocetyl stearate 17.0(6)
Propylene glycol dibucanate 20.0 (71 glyceryl trioctanoate 8.2 (8) antioxidant 0.05 (9) preservative
0.0500) Titanium oxide
3.0 (b) Red No. 202
0.302) Red No. 226
19 mouth 03) Yellow No. 4 aluminum rake
1.2 (14) Fragrance
0,2 (Production method) A(1), (3) to (7) are heated and dissolved at 120°C.

Cool BA to 100°C, add and dissolve (2), (8), and (9).

Disperse 00]~63) in CB.

After degassing the DC, add water and pour into a container to cool.

The lipstick of Example [11] obtained as above does not use wax, so it does not feel hard when applied, is smooth and spreads well, and gives an excellent gloss to the lips. Met. On the other hand, the lipstick of Comparative Example El] using wax felt hard and heavy when applied, and was unsatisfactory in spreadability and smoothness.

Example [2] Stick-shaped transparent lipstick (prescription)
(% by weight) (1) N-lauroyl-L-glutamine 5.5 acid-α, γ-gin
-Butyramide (2 starch fatty acid ester 5.0)
3112- and droxystearic acid 1.5 (4)
Diglyceride triisostearate 77.65L (5) Pentaerythritol rosin acid 10.
0(6) Antioxidant 0.0
5(7) Preservative 0.
05 (8) Red No. 223 0.05
(9) Fragrance 0.2
(Manufacturing method) A (1), (4), and (5) are heated and dissolved at 130 to 135°C.

Cool BA to below 110°C, (2), (3), (phrase,
Add and dissolve (7).

Distribute (8) to CB.

After degassing the DC, add (9), pour into a container, and cool.

The transparent lipstick of Example [2] obtained as described above had excellent transparency in appearance, was stable, spread well during use, and had a smooth feeling of use. Moreover,
It imparted very good gloss to the lips.

Example [3] Stick transparent lipstick (formulation) (wt%) (1)
N-lauroyl-shi-glutamine 4,0 acid-α,
γ-di-n-butylamide (2) Starch fatty acid ester 10.0
(3) Methylphenylpolysiloxane 82.6
5(4) Antioxidant 0.05
(5) Preservative 0.05 (
6) Phytantriol 3.0 (
Power Red No. 202 0.05 (8
) Fragrance 0.2 (Production method) A (1), (3), (Dissolve 0 in an appropriate amount of methyl alcohol, stir and mix, then remove the methyl alcohol.

Add (2), (4), and ((b) to BA and heat and dissolve at 110°C.

Distribute (7) to CB.

After degassing the DC, add (8), pour into a container, and cool.

The transparent lipstick of Example [3] obtained as described above had excellent transparency in appearance, good stability over time, and excellent spreadability and smoothness. Moreover, it imparted very good gloss to the lips after application.

Actual Jei example [4] 7111 condition [) Beni (prescription) (wt%) (1)
N-lauroyl-shi-glutamine 3.0 acid-α
, γ-di-n-butylamide (2) Starch fatty acid ester 5.0 (
3) Glyceryl trioctanoate 15.0 (4)
Diglyceryl triisostearate 56.6 l(5) Pentaerythritol rosin acid 20.0
((f) Antioxidant 0.05(
7) Preservative 0.05 (8
) Red No. 202 0.1 (9 N) Fragrance 0.2 (Production method) A Heat and dissolve (1), (4), and (5) at 130 to 135°C.

Cool BA to 110°C or less, (2), (3), (6)
, (Apply force and dissolve.

Distribute (8) to CB.

After degassing the DC, (9) is added, poured into whole blood, and cooled.

The dish-shaped lipstick of Example [4] obtained as described above has good ease of use when applied with a red brush, and has a smooth and easy-to-apply feel, It imparted excellent gloss to the lips after application.

[Effects of the Invention] As detailed above, the solid cosmetic of the present invention is obtained by gelling a liquid oil by using N-acylamino acid amide and starch fatty acid ester together as a gelling agent. .

With the present invention, without the use of wax, it has moderate strength, no sweating, etc., and has a good hardening and molding state. It has now become possible to obtain a solid cosmetic that is easy to use, has excellent gloss and transparency, and has an excellent appearance.

that's all Applicant: Kobayashi Kose Co., Ltd.

Claims (1)

[Claims] (1) Contains 1-10% by weight of N-acylamino acid amide, 1-25% by weight of starch fatty acid ester, and 40-95% by weight of a liquid oil containing 30% by weight or more of polar liquid oil as essential components. Solid cosmetics featuring: