JP2016060716A - Opaque cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opaque cosmetic in which a ring formation does not occur with time in the opaque cosmetic made to become opaque by using acylamino acid ester as an oil solution.SOLUTION: The invention provides an O/W type opaque cosmetic containing (A) polyhydric alcohol, (B) acylamino acid ester, (C) phospholipid, (D) polyoxyethylene alkyl ether, and (E) tamarind gum, wherein the tamarind gum (E) is contained at the rate of 0.01-2 mass% to the entire opaque cosmetic.EFFECT: By compounding tamarind gum, a ring caused by an emulsification particle itself getting fixed in the interface between a liquid surface and a container while maintaining its emulsified state with time is not formed, and thereby the opaque cosmetic can maintain a stable opaque state and high moisturizing effect.SELECTED DRAWING: None

Description

The present invention relates to a cloudy cosmetic.

As basic cosmetics, a lotion that gives moisture to the skin and keeps the skin fresh and an emulsion containing a moisturizing component and an oily component to maintain the moisture balance of the skin are widely known. So far, lotion and emulsion have been provided and used as separate products. Recently, cloudy cosmetics have been proposed that have both the freshness and coolness of lotion and the creaminess of emulsion. ing. Further, it is associated with the fact that the white turbidity contains a larger amount of the active ingredient than the transparent skin lotion, and it is possible to promote a high moisturizing effect.

  There are two types of white turbid cosmetics: those that are made cloudy by blending oils and those that are clouded by blending organic polymer particles such as styrene / vinyl pyrrolidone copolymer. There is. In the case of white turbidity with a polymer, practically no moisturizing effect is obtained. However, when clouded with an oil agent, an oil film is formed on the skin after use, so that moisture transpiration is suppressed and the moisturizing effect is enhanced.

The cloudy cosmetic composition containing an oil agent further includes those in which an aqueous phase and an oil phase are emulsified and dispersed with a surfactant, and those in which a surfactant and an oil agent are dissolved in ethanol and dispersed in an aqueous phase. In addition, a method of forming a cloudy lotion by forming a D phase with an oil agent, a surfactant, and a polyhydric alcohol and then dispersing it in an aqueous phase is known.
The cloudy cosmetic composition containing such an oil agent has a better moisturizing effect than the solubilized transparent cosmetic composition, and is therefore particularly preferred for people with dry skin.

  However, since the cloudy lotion with oil is basically unstable, it is difficult to maintain the three-year stability required for cosmetics, such as reduction, increase and separation of turbidity. Furthermore, the cloudy cosmetics that have become clouded by blending an oil agent, the adhering material (or adhering matter) at the boundary between the cosmetic liquid upper end and the container wall surface over time, a ring-like shape (hereinafter referred to as a ring) May be observed). In particular, in a prescription system with a large amount of oil and a small amount of surfactant, the ring tends to appear frequently.

It is not certain what causes the ring to be formed, but in many cases, when the ring is formed, a phenomenon in which the turbidity of the cloudy cosmetic is lowered at the same time is observed. Such a phenomenon not only impairs the beauty of the cloudy cosmetic, but also lowers the quality of the cosmetic, and an early solution has been demanded.

As a method for solving this ring formation, a method of reducing the amount of the oil agent is conceivable. However, if the amount of the oil agent is reduced, the moisturizing effect is reduced by that amount, and the effect peculiar to the cloudy cosmetic is impaired. In addition, the oil agent is easily solubilized over time, and transparency tends to occur.
Thus, a method of increasing the amount of surfactants selected and the amount thereof has been proposed (JP 2000-229812 A), but the adjustment of the turbidity of the turbid cosmetics affects the balance of the entire other ingredients, It is difficult to maintain white turbidity and feeling of use while suppressing ring formation.
In addition, attempts have been made to increase the viscosity of cosmetics by adding a thickener (Japanese Patent Laid-Open No. 2006-160725), but there are problems with the feeling of use such as stickiness and poor familiarity.

On the other hand, a solution (Japanese Patent Laid-Open No. 2011-162492) is disclosed in the case where the decrease in the white turbidity of the white turbid cosmetic is taken as the cause of adsorption of a specific component to the container. However, although a decrease in white turbidity has been confirmed when a ring is formed, it is unclear whether or not a ring is formed when a decrease in white turbidity occurs, and Japanese Patent Laying-Open No. 2011-162492. However, no solution to ring formation is mentioned.

By the way, various thickeners such as carboxyvinyl polymer, xanthan gum and tamarind gum are used for cosmetics.
Tamarind gum, in particular, exhibits Newtonian flow, has a characteristic of low spinnability and low nulliness, and has been widely used as a thickener and moisturizer as a cosmetic raw material for a long time. It was not known.

JP 2000-229812 A JP 2006-160725 A JP 2011-162492 A

  The inventor of the present application conducted various experiments on the formation of a ring formed over time in a cloudy cosmetic made using an amino acid ester as an oil agent. It was confirmed that when the mixture was shaken manually, the ring disappeared and the turbidity was recovered. From this, it is surmised that the formation of the ring does not occur due to the coalescence of the emulsion, but rather occurs as a result of the emulsion particles themselves being fixed to the interface between the liquid surface and the container while maintaining the emulsified state. It was.

The present invention has been made in view of the above-described background art, and an object thereof is to provide a cloudy cosmetic material in which ring formation does not occur over time in a cloudy cosmetic product that is clouded using an amino acid ester as an oil agent. .

(A) a polyhydric alcohol,
(B) an acylamino acid ester,
(C) phospholipid,
(D) Polyoxyethylene alkyl ether (E) An O / W type cloudy cosmetic characterized by containing tamarind gum.

According to the present invention, there is no ring formation that appears when the emulsified particles themselves remain in an emulsified state over time and are fixed to the interface between the liquid surface and the container, and a stable white turbid state and a high moisturizing effect A cloudy cosmetic that maintains the above is provided.

Hereinafter, the present invention will be specifically described. In the present invention,% is used in the meaning of mass / mass% (w / w%) unless otherwise specified.

The polyhydric alcohol used for this invention will not be specifically limited if it can be used for O / W cloudy cosmetics.
Examples include glycerin, diglycerin, polyglycerin, polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, hexylene glycol, and the like, and one or more are used as necessary. Among these, glycerin or 1,3-butylene glycol is preferable.

Although the quantity of the polyhydric alcohol used by this invention is not specifically limited, 0.5-60 mass% is preferable with respect to the cloudy cosmetics whole quantity, More preferably, it is 1-25 mass%. Among these, 3.5 to 15% by mass is particularly preferable, and if it is within this range, a cosmetic material excellent in feeling of use can be obtained without being sticky. If the amount of the polyhydric alcohol is less than 3.5% by mass, the antiseptic property of the cosmetic may be lowered, and thus it is preferable to appropriately adjust with a preservative.

The acylamino acid ester used in the present invention is not particularly limited as long as it can be used in an O / W cloudy cosmetic.
Acyl amino acid ester is produced by condensing amino acid and acyl chloride in the presence of an alkali to form an N-acyl amino acid, followed by dehydration condensation with the corresponding alcohol in the presence of a base or acid, optionally in the presence of a solvent. I can do it.

The acyl group of the acylamino acid ester is preferably one having 8 to 30 carbon atoms, and may be saturated or unsaturated. For example, 2-ethylhexanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, behenoyl group, oleoyl group, isostearoyl group, linolenoyl group and the like are preferable, and lauroyl group is particularly preferable. The group constituting the ester and derived from the alcohol component may be branched, linear, or cyclic, but is preferably a group having 16 to 36 carbon atoms. For example, a group derived from an aliphatic alcohol such as an octyl group, a lauryl group, a myristyl group, a cetyl group, a stearyl group, an isostearyl group, an octyldecyl group, a behenyl group, an octyldodecyl group, or a campesteryl group that is a plant-derived sterol. And groups derived from sterols such as a sterol group such as a sterosteryl group and a cholesteryl group which is an animal-derived sterol.

Specific examples of acyl amino acid esters include N-lauroyl-L-glutamate di (cholesteryl / behenyl / 2-octyldodecyl), N-lauroyl-L-glutamate di (cholesteryl / 2-octyldodecyl), N- Lauroyl-L-glutamate di (phytosteryl / behenyl / 2-octyldodecyl), N-lauroyl-L-glutamate di (phytosteryl / 2-octyldodecyl), myristoylmethyl β-alanine (phytosteryl / decyltetradecyl) It can be illustrated.

  In addition, these ingredients are already commercially available as cosmetic raw materials, such as “El Deu PS-306” (N-lauroyl glutamate di (phytosteryl / behenyl / 2-octyldodecyl)), “El Deu APS-307” (Myristoyl). Examples include methyl β-alanine (phytosteryl / decyltetradecyl)) (Ajinomoto Co., Inc.), “Plandool-LG4” (dilauroyl glutamate (octyldodecyl / behenyl / phytosteryl)) (manufactured by Nippon Seika Co., Ltd.) Among them, “Eldue PS-306” and “Eldue APS-307” are particularly preferable. Any one of these components can be used alone, or two or more of these components can be used in combination.

The amount of the acylamino acid ester used in the present invention is not particularly limited, but is preferably 0.05 to 20% by mass, more preferably 0.1 to 15% by mass, based on the total amount of the cloudy cosmetic. Among these, 0.3 to 10% by mass is particularly preferable. If it is this range, it is excellent in a feeling of use without stickiness, and the cosmetics which can realize the outstanding emollient effect derived from acylamino acid ester are obtained.

The phospholipid used in the present application is not particularly limited as long as it can be used for an O / W cloudy cosmetic.
For example, natural lecithin such as soybean lecithin, corn lecithin, cottonseed oil lecithin, egg yolk lecithin, egg white lecithin; lysophospholipid such as lysolecithin, lysophosphatidylethanolamine; hydrogenated lecithin, phosphatidylserine, phosphatidylethanolamine, phosphatidylinositol, phosphatidylglycerol, Etc. can be illustrated. Of these, hydrogenated lecithin is preferred.
In the present invention, one or two or more of the above-described phospholipids can be used in combination.

Although the quantity of the phospholipid used by this invention is not specifically limited, 0.025-3 mass% is preferable with respect to the cloudy cosmetics whole quantity, Most preferably, it is 0.05-2 mass%. Among these, 0.1 to 1% by mass is particularly preferable. If it is this range, there is little stickiness and it is excellent in a usability | use_condition, and it can have favorable usability, without an odor changing substantially with time.

The number of moles of ethylene oxide added to the polyoxyethylene hydrogenated castor oil used in the present application is not particularly limited, but from the viewpoint of the stability of the appearance (white turbid state), the average number of moles added is preferably 40 to 100. Those having an added mole number of 40 to 50 are more preferable. Among them, PEG-50 hydrogenated castor oil (HLB = 13.5) can be suitably used. For example, commercially available NIKKOL HCO-50 (manufactured by Nikko Chemicals Co., Ltd.) and Braunon RCW-50 (manufactured by Aoki Yushi Kogyo Co., Ltd.) are used. be able to.

Although the quantity of the polyoxyethylene hydrogenated castor oil used by this invention is not specifically limited, 0.1-7 mass% is preferable with respect to the cloudy cosmetics whole quantity, More preferably, it is 0.1-5 mass%. Among these, 0.3 to 2% by mass is particularly preferable. If it is this range, the cosmetic which does not mind the undesirable stickiness and raw material odor derived from polyoxyethylene hydrogenated castor oil, while maintaining the emulsification stability of cosmetics can be produced.

The tamarind gum used in the present invention is composed of tamarind seed polysaccharide, and is a water-soluble polymer polysaccharide of xyloglucan having glucose as a main chain and xylose and galactose as side chains. Single-stranded xyloglucan chains having an average molecular weight of about 32,000 are randomly self-associating.
Tamarind gum can be obtained by extracting the endosperm portion of tamarind seeds with warm to hot water or an alkaline aqueous solution, or by extracting the extract from endosperm with β-galactosidase or lactase. I can do it. As a commercially available product, Griloid 6C (manufactured by DSP Gokyo Food & Chemical Co., Ltd.) can be used.

In this invention, it mix | blends in order to prevent adsorption | suction to the container of the mixing | blending component in cosmetics.
The amount of the tamarind gum used in the present invention is not particularly limited, but is preferably 0.01 to 2% by mass, more preferably 0.1 to 1% by mass, based on the total amount of the cloudy cosmetic. Among these, 0.25 to 0.5% by mass is particularly preferable. If it is this range, the adsorption | suction to a container will be suppressed especially suitably and formation of the said ring will be suppressed. Even if 1.0% or more is blended, the ring formation suppressing effect tends to reach a peak.

Although the mass ratio of the oil agent and surfactant used in the present invention is not particularly limited, it is preferably 1: 3 to 3: 1. Above all, when it is 1: 1 to 3: 1, the turbidity is kept stable without forming a ring for a longer period.

In the present invention, the turbidity is determined by using the absorbance at a wavelength of 660 nm as an index. The white turbid cosmetic of the present invention refers to one having an absorbance of not less than 0.05 when the absorbance is measured at 660 nm.
According to the present invention, it is possible to suppress ring formation over time of the cloudy cosmetic material exhibiting the cloudiness in the above range.

As long as the object of the present invention is not impaired, the cosmetics of the present invention include other additives used in various lotions and emulsions, for example, oils other than acylamino acid esters, phospholipids, and polyoxyethylene hardened castors. Surfactants, pH adjusters, humectants, alcohols and glycols, colorants, vitamins, preservatives, and the like can be blended.

Hereinafter, although the present invention will be described in more detail based on the following examples, it is needless to say that the present invention is not limited to the following examples.

Based on the ingredient table shown in Table 1, a cloudy cosmetic was prepared by the following method, and the presence or absence of ring formation and elimination, the change in cloudiness, and the feeling of use were confirmed.

<Production method>
In Table 1 and Table 2, 1-3 are heated and mixed to obtain an oil phase. 4 and 5 are heated and mixed to obtain a polyol phase. The oil phase and the polyol phase are mixed, and a portion of the heated 16 is blended therein, and preliminary emulsification is performed using a homomixer. The obtained preliminary emulsion was subjected to high-pressure emulsification treatment at a pressure of 100 MPa using Nanovaita (Yoshida Kikai Kogyo Co., Ltd.). 6-15 and the remainder of 16 were mix | blended with what was obtained.

Since a method of increasing the viscosity is known as a method for suppressing the formation of a ring that occurs over time in a cloudy cosmetic, each of Examples 1 and Comparative Examples 1 to 6 in Table 1 is used to avoid the effect of viscosity. The cloudy cosmetic prepared by the formulation was adjusted to have a constant viscosity by adjusting the amount of the polymer so that the final viscosity was about 10 mPa · s.
In Table 2, the effect of suppressing ring formation was confirmed when the amount of the (E) tamarind gum of the constituent component of the present application was made constant and the amount of the other constituent components of the present application was changed.

Each cosmetic shown in Table 1 and Table 2 was evaluated according to the following criteria.
<White turbidity>
The absorbance (660 nm) of the cosmetic was measured using a spectrophotometer (SHIMADZU UV-2450 UV-VISIBLE SPECTROPHOTOMETER: glass cell).
<Presence or absence of ring formation>
The cosmetics prepared in Table 1 were placed in a transparent cylindrical PET container and allowed to stand at room temperature or 40 ° C. for 21 days, and then visually confirmed.
-: No ring
+: Ring formation is observed, but if the container is shaken up and down 10 times manually, the ring is eliminated
++: Ring formation is more severe than +, and ring does not disappear even after shaking <Confirmation of feeling of use>
A certain amount was applied to the skin by 10 professional panelists, and the feeling of use of each prescription was confirmed.

The feeling of use of each prescription example is not thick for the comparative product 6, but feels thick and thick for the examples and the comparative products 1 to 5. Although there is a difference in mass% of the blended amount of the polymer / stabilizer to be blended between the practical product and the comparative products 1 to 5, it was judged that the viscosity was equivalent to the practical product or somewhat viscous.
The example had a moist feeling compared to the comparative product 6, the skin perception when applied to the face using cotton was good, and there was no stickiness. Moreover, although the comparative products 1-5 had a moist feeling, stickiness was also felt and it was not a favorable usability.

A thickener may be added to maintain and stabilize the cloudy state of the cloudy cosmetic. In this case, a substance that is often selected is a substance that has a high yield value and can easily maintain viscosity even at high temperatures, such as xanthan gum. Since tamarind gum is inferior in that respect, it is usually not first selected for addition to maintain and stabilize cloudiness. However, in this example, the effect of suppressing ring formation over time was confirmed by adding tamarind gum. In particular, even when the amount of the oil agent was increased as in Example 2, the formation of the ring could be suitably suppressed.

Example 4: Protective lotion (mass%)
(1) Lauroyl glutamate di (octyldodecyl / phytosteryl / behenyl) 0.3
(2) Hydrogenated lecithin 0.02
(3) PEG-100 hydrogenated castor oil 0.2
(4) 1,3-butylene glycol 4.0
(5) Concentrated glycerin 4.0
(6) Dipropylene glycol 2.0
(7) Preservative appropriate amount (8) pH adjuster appropriate amount (9) Tamarind gum 0.2
(10) Water balance 100
(1) to (3) are heated and mixed to obtain an oil phase. Part of (4), (5) and (6) is heated and mixed to obtain a polyol phase. An oil phase and a polyol phase are mixed, and heated (10) is partially blended, mixed and emulsified, and the remaining ingredients (7) to (9) and the remainder of (10) are mixed with this to protect makeup Got water. Even in this protective lotion, no ring was formed over time.

Example 5: Hair mist (mass%)
(1) Lauroyl glutamate di (octyldodecyl / phytosteryl / behenyl) 0.5
(2) Hydrogenated lecithin 0.02
(3) PEG-50 hydrogenated castor oil 0.2
(4) Glycerin 0.5
(5) 1,3-butylene glycol 1.0
(6) Ethanol 2.0
(7) PPG-6 decyltetradeceth-30 1.0
(8) Polyurethane-14 1.0
(9) Tamarind gum 0.1
(10) Water balance 100
(1) to (3) are heated and mixed to obtain an oil phase. (4) A part of (5) is heated and mixed to obtain a polyol phase. The oil phase and the polyol phase are mixed, and heated (10) is partially blended, mixed and emulsified, and the remaining components (7) to (9) and the remainder of (10) are mixed therein, and the hair mist is mixed. Obtained. No ring was formed over time in the hair mist.

Example 6: Protective lotion (mass%)
(1) Myristoylmethyl β-alanine (phytosteryl / decyltetradecyl) 0.3
(2) Hydrogenated lecithin 0.02
(3) PEG-50 hydrogenated castor oil 0.2
(4) 1,3-butylene glycol 10.0
(5) Concentrated glycerin 4.0
(6) Glycosyl trehalose 0.47
(7) Hydrolyzed hydrogenated starch 0.27
(8) Preservative appropriate amount (9) pH adjuster appropriate amount (10) Tamarind gum 0.25
(11) Water balance 100
(1) to (3) are heated and mixed to obtain an oil phase. Part of (4), (5) and (6) is heated and mixed to obtain a polyol phase. The oil phase and the polyol phase are mixed, and the heated (11) is partially blended, mixed and emulsified, and the remaining ingredients (7) to (10) and the remainder of (11) are mixed with this to protect Got water. Even in this protective lotion, no ring was formed over time.

As described above, according to the present invention, in cloudy cosmetics that are made cloudy using an acylamino acid ester as an oil agent, the components in the cosmetics are not adsorbed on the container, and the formation of rings over time can be suppressed. As a result, the turbidity can be kept stable.

Claims (3)

(A) a polyhydric alcohol,
(B) an acylamino acid ester,
(C) phospholipid,
(D) O / W type cloudy cosmetic containing polyoxyethylene hydrogenated castor oil (E) tamarind gum (A) 1 to 25% by mass of polyhydric alcohol,
(B) 0.1-15% by mass of acylamino acid ester,
(C) 0.05-2% by mass of phospholipid,
(D) 0.1 to 5% by mass of polyoxyethylene hydrogenated castor oil,
(E) Tamarind gum is 0.1 to 1.0% by mass
The O / W type cloudy cosmetic according to claim 1, wherein (A) a polyhydric alcohol,
(B) an acylamino acid ester,
(C) phospholipid,
(D) A method of suppressing ring formation that occurs over time of an O / W type white cloudy cosmetic by blending (E) tamarind gum in the presence of polyoxyethylene hydrogenated castor oil.