JP2000204032A - Cosmetic and skin lotion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic and a skin lotion having high emulsion stability and safety, excellent in moisture retaining property, emollient property and feeling of touching by including water, an oil, a surfactant and an oligomer of hydroxystearic acid. SOLUTION: This cosmetic and a skin lotion is obtained by including (A) water, (B) an oil, (C) a surfactant and (D) an oligomer of hydroxystearic acid. Solid oil (e.g. vaseline, lanolin), liquid oil (e.g. avocado oil, olive oil) or the like is exemplified as the component B. Polyoxyethylene alkyl ether or the like is exemplified as the component C. Preferably the component D is from dimmer to dodecamer of hydroxystearic acid. Preferably in the case of a emulsion-type preparation, a formulation volume of the component B is 10-60 wt.% and that of the component C is 0.5-20 wt.%, and in the case of an ointment-like preparation the blending quantity of the component B is 60-80 wt.% and that of the component C is 0.3-15 wt.%. Preferably the ratio of the components B and C is 5:1-50:1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to cosmetics and external preparations for skin characterized by containing water, oil, surfactant, and hydroxystearic acid oligomer, and the object thereof is stability and safety. Another object of the present invention is to provide cosmetics and skin external preparations which are highly moisturized and have excellent moisturizing, emollient properties and feel.

[0002]

2. Description of the Related Art The skin plays a role of covering the whole body and protecting the living body from various irritation and drying from the outside world. Working as a barrier to prevent spills to In order to maintain youthful and fresh skin, water retention in the stratum corneum is indispensable, but in the stratum corneum, hydrophilic hygroscopic substances and intercellular lipids holding bound water play an important role. I have.

[0003] Cosmetics such as creams, emulsions and ointments and ointment products for external use have been widely used to form an oil film on the skin surface with an oil agent such as mineral oil, animal oil or vegetable oil to impart moisturizing properties. However, these are those which suppress the evaporation of water by forming an oil film, have an excessive obstructive property, impair the normal physiological action of the skin, and have a problem that the feeling of use such as stickiness is deteriorated.

[0004] In addition, creams, emulsions and ointments are mixed with a water-soluble moisturizing component to enhance the moisturizing effect. That is, it is common to add a humectant such as a polyhydric alcohol, an amino acid, or a polymer. However, after being applied to the skin, the humectant is lost due to sweat or washing because of water solubility, and sufficient No moisturizing property is obtained.

On the other hand, in recent years, creams, emulsions and ointments have been mixed with oil-soluble moisturizing components (emollients) to enhance the moisturizing effect. That is, ceramide,
Cholesterol or sterol derivatives are very excellent emollients, and they are effective even in very small amounts. However, when it is blended into general cosmetics or skin external preparations, there is a problem that the solubility is low and the feel is bad such as stickiness. In addition, lanolin, which is rich in cholesterol and can be easily collected from wool, is an inexpensive and excellent emollient, but in addition to stickiness, because it is derived from animals, it has product quality fluctuation, and also has safety such as irritation. Had a problem.

[0006] On the other hand, a stable emulsion is a performance required for cosmetics and external preparations for the skin. However, in order to improve the stability by a general emulsification method, a large number of emulsifiers must be mixed and used in large amounts. The use of emulsifiers has been detrimental to safety, and as a method of obtaining stable emulsions by reducing the amount of these emulsifiers, we will make full use of interfacial scientific knowledge such as D-phase emulsification and liquid crystal emulsification. A known method and a method using a device having a high shearing force such as a high-pressure homogenizer are known. However, these methods generally require skill, and there is a problem that the formulation design and operation are complicated.

The hydroxystearic acid oligomer used in the present invention is generally known as a pigment dispersant for toners and the like (JP-A-47-13431). In addition, as a pigment dispersant for cosmetics, CTFA (US The Cosmetic, Toil) is called polyhydroxystearic acid.
etry, and Fragrance Association), and is used in makeup prescriptions such as lipstick. However, hydroxystearic acid oligomers are only known for use as these oil-soluble pigment dispersants, and water, creams, emulsions and surfactants in combination with surfactants,
It has not been known to prepare a cosmetic such as an ointment or a skin external preparation. In addition, in Japanese Patent Publication No. 59-53253,
Esterified products of hydroxystearic acid oligomers and monohydric alcohols are described as oily agents having water hydration, but these are satisfactory in emollient properties, feel, and emulsion stability when formulated in cosmetics and external preparations for skin. It doesn't work.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cosmetic or skin external preparation which has high emulsion stability and safety, and is excellent in moisturizing, emollient properties and feel.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have conducted intensive studies in order to overcome the problems of the prior art, and as a result, have found that cosmetics and external preparations for skin using water, oil, surfactant and hydroxystearic acid oligomer in combination. However, they have found that they have high stability and safety, and are excellent in moisturizing, emollient properties and feel, and completed the present invention.

That is, the present invention relates to water, oil, surfactant,
The present invention relates to cosmetics and skin external preparations containing a hydroxystearic acid oligomer.

The oil used in the present invention is a solid oil, a liquid oil,
Any of semi-solid oils may be used, and those usually mixed in cosmetics can be used. Examples of solid and semi-solid oils include petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax, candelilla wax; higher fatty acids such as coconut oil fatty acids, lauric acid, and hardened tallow fatty acids; lauryl alcohol, cetyl alcohol, stearyl alcohol And higher alcohols such as behenyl alcohol. As liquid oil, for example, avocado oil,
Vegetable oils such as olive oil and jojoba oil; fatty acids such as oleic acid and isostearic acid; alcohols such as hexadecyl alcohol and oleyl alcohol; cetyl 2-ethylhexanoate; 2-octyldodecyl myristate;
Neopentyl glycol 2-ethylhexanoate, tri-
Glycerol 2-ethylhexanoate, oleic acid-2-
Ester oils such as octyldodecyl, isopropyl myristate, glycerol triisostearate, and diglyceride 2-ethylhexanoate; ester oils such as octyldodecyl long-chain acylglutamate; dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, Silicon oils such as octamethylcyclotetrasiloxane; liquid hydrocarbon oils such as liquid paraffin, squalene, and squalane; These oils can be used alone or in combination of two or more.

The surfactants used in the present invention are usually used as emulsifiers, and the nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil derivatives, polyoxyethylene fatty acid esters, and polyoxyethylene fatty acid esters. Polyoxyethylene surfactants such as oxyethylene polyhydric alcohol fatty acid partial esters and polyoxyethylene alkyl phenyl ether, alkyl glucosides, alkyl polyglucosides, polyglycerin fatty acid esters, polyglycerin alkyl ethers, maltitol-hydroxyalkyl ether , Sugar alcohol ethers such as sorbitol alkyl ether, fatty acid diethanolamide, etc., sodium lauryl sulfate, lauric acid diethanolamide, polyoxyethylene laurate. Anionic surfactants such as sulphate, acylamino acid salts and acylmethyltaurine salts, cationic surfactants such as acylarginine ethyl ester and stearyltrimethylammonium chloride, and amphoteric surfactants such as imidazolium betaine and dimethylalhaloyl lysine. They can be used as appropriate.

The hydroxystearic acid oligomer used in the present invention can be obtained by performing an intermolecular esterification reaction between a hydroxyl group and a carboxyl group present in 12-hydroxystearic acid. As the esterification reaction proceeds, the molecular weight of the product increases, and its properties change from a liquid to a paste and further to a wax. The oligomer used in the present invention is preferably a dimer to dodecamer of hydroxystearic acid. Unreacted 12-hydroxystearic acid may be used after removal.
If it is 0% by weight or less, preferably 10% by weight or less, it may be used in a form containing unreacted 12-hydroxystearic acid.

The esterification reaction is carried out in the absence of a catalyst or in the presence of a catalyst at normal pressure or reduced pressure according to a conventional method.
The reaction is carried out until the product of the desired properties is obtained, and the degree of progress of the reaction is determined by the acid value. During the reaction, there is a part that is dehydrated intramolecularly, but if it is 20% by weight or less, preferably 10% by weight or less, it may be left or may be purified and removed.

The amount of oil in the cosmetic or skin external preparation of the present invention may be from 1% to 1% for emulsified cosmetic or skin external preparation.
It is preferably 60% by weight, more preferably 10% to 60%.
60% for ointment-like cosmetics and skin external preparations
To 95% by weight, more preferably 60% to 8% by weight.
0% by weight. When the amount of the oil is small, the emollient property is not exhibited, and when the amount is large, the stickiness, the feeling of clogging is increased, and the touch is deteriorated. The amount of the hydroxystearic acid oligomer is preferably 0.05% to 30% by weight, more preferably 0.5% to 20% by weight. If the amount of the hydroxystearic acid oligomer is too small, it does not contribute to emulsion stability, and if it is too large, the feel when applied to the skin becomes poor. The ratio of oil to hydroxystearic acid oligomer is from 1: 1 to 9
5: 1 is preferred, more preferably 5: 1 to 50:
It is one. When the ratio of the oil to the hydroxystearic acid oligomer is less than 1: 1, the feel is poor, and when it exceeds 95: 1, it does not contribute to emulsion stability, which is not preferable. The surfactant can be compounded in an amount of 0.1% to 20% by weight, although it depends on the ratio of oil and water, cosmetics, and the feeling and stability required for the external preparation for skin.
0.3% to 15% by weight is preferred. If the amount is less than 0.1% by weight, a suitable emollient property of the hydroxystearic acid oligomer is not exhibited, and if the amount exceeds 20% by weight, the safety at the time of application to the skin deteriorates, which is not preferable. Water is a residual component of the cosmetics and external preparations of the present invention, but cosmetics and external preparations containing no water significantly impair the emollient effect and have a strong sticky feeling.

The method of preparing the cosmetic or skin external preparation of the present invention is no different from the method of preparing ordinary emulsions, ointments, etc., but the hydroxystearic acid oligomer is added to the oil and mixed first. Is preferred from the viewpoint of simplicity of operation.

The cosmetic of the present invention can be in the form of an emulsion, a kneaded mixture or the like. In addition, as the cosmetics of the present invention, facial cleansing cream, facial cleansing foam, cleansing cream, cleansing milk, cleansing lotion, massage cream, cold cream, moisture cream, milky lotion, lotion, pack, after shaving cream, sunscreen cream, suntan Oil, body shampoo, hair shampoo, hair rinse,
Hair treatment, hair restoration, hair restoration, tics, hair cream, balm, hair liquid, set lotion, hair spray, hair dye, hair bleach, color rinse,
For color spray, permanent wave liquid, eye shadow, hand cream, liquid detergent, antiperspirant, bath agent, etc.
External preparations for the skin include senile xeroderma, actinic keratosis, sweaty pyoderma, mycosis, dermatophytosis, contact dermatitis, atopic dermatitis, simple lichenosis, prurigo ointment, etc. And can be applied regardless of the form of the product.

Further, additives such as a humectant and a thickener can be added as required. For example, humectants such as glycerin, propylene glycol, dipropylene glycol, polyethylene glycol, chondroitin sulfate, hyaluronate, diglycerin, 1,3-butylene glycol, sorbitol, phosphoric acid, citric acid, malic acid, lactic acid, PH buffers such as oxalic acid, hydrochloric acid and salts thereof, ammonia, alkanolamine, ammonium carbonate, sodium hydrogencarbonate, sodium hydroxide, potassium hydroxide, aminomethylpropanol, hydroxyethanediphosphonates, phenacetin, EDTA and the like Examples include sequestering agents such as salts and preservatives such as parabens. In addition, carboxymethylcellulose, carboxyvinyl polymer, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, xanthan gum, carrageenan, alginate, pectin, ferrasene, arabic gum, gatch gum, karaya gum, tragacanth gum, agar powder, bentonite, crosslinked polyalkylate And the like can be appropriately compounded as long as the effects of the invention are not impaired. In addition to the above, a coloring agent, a fragrance, and an alcohol can be blended.

Further, the agents to be incorporated into the external preparation for skin of the present invention include all agents to be incorporated into external preparations, such as analgesics, disinfecting and disinfecting agents, antifungal agents, exfoliants and exfoliants, and skin bleaching agents. Skin coloring agents, granulation agents, epidermis-forming agents, necrotic tissue removers, corrosive agents, hair growth agents, dehydrating agents, sunscreen agents, antiperspirants, deodorants, hormones, vitamins and the like.

[0020]

EXAMPLES Next, the present invention will be described in more detail with reference to Production Examples, Examples, Formulation Examples and Comparative Examples. Note that the present invention is not limited to this. <Evaluation method> Emulsion stability was evaluated by putting cosmetics or an external preparation for skin into a transparent bottle and observing the appearance with the naked eye.
The sample was stored at room temperature for one month and no change in appearance was evaluated as ○, and the product separated into two layers was evaluated as ×. For evaluation of emollient property, each cream was applied to a forearm washed with soap, and skin conductance after 1 hour passed was measured by SKICON 200 (manufactured by IBS).
The measurement was carried out at 25 ° C. and a humidity of 40%. In the average value of four subjects, the conductance value was 100 or more in ◎, 80 or more in ○, 60 to 80 in Δ, and 60 or less in ×.
And The evaluation of feel was evaluated in three stages by sensory evaluation by 15 professional panels, and from the average value of the following evaluation points,
2.5 points or more were evaluated as O, 1.5 to 2.5 points as Δ, and 1.5 or less as X. No sticky feeling is preferred ... 3 points, Sticky feeling is normal ... 2 points, Sticky feeling is not preferable ... 1 point,

<Production Method of Emulsified Cosmetic> The oil phase and the aqueous phase are each heated and mixed at 80 ° C., and the aqueous phase is gradually added while stirring the oil phase with a chem stirrer, and further cooled to room temperature with further stirring. Thus, an emulsion was obtained. Emulsion cosmetics having the compositions shown in Table 1 were produced and evaluated for emulsification stability. The results are shown in Table 1.

[0022]

[Table 1]

An emulsified cosmetic having the composition shown in Table 2 was prepared,
The emollient property and stability were evaluated. Second result
It is shown in the table.

[0024]

[Table 2]

A foundation having the composition shown in Table 3 was prepared and evaluated for emollient property and feel. The results are shown in Table 3.

[0026]

[Table 3]

The compositions of Examples 9 to 13 were prepared,
All had good stability and excellent emollient properties. In addition, numerical values show weight%. (Example 9) Emollient lotion Cetyl alcohol 1.0 Beeswax 0.5 Vaseline 2.0 Squalane 6.0 Dimethylpolysiloxane 2.0 Hydroxystearic acid oligomer 2.0 Ethanol 5.0 Concentrated glycerin 4.0 Amino acid mixture 0.0 2 1,3 butylene glycol 4.0 POE (10) monooleate 1.0 glycerol monostearate 1.0 quince seed extract (5% aqueous solution) 20.0 dye appropriate amount preservative appropriate amount perfume appropriate amount purified water residue

(Example 10) Cleansing gel Liquid paraffin 12.0 Glyceryl trioctanoate 50.0 Hydroxystearic acid oligomer 1.0 Sorbitol 10.0 PEG400 5.0 Acylglutamic acid 5.0 POE Octyldodecyl alcohol ether 10.0 Perfume Appropriate amount Sequestering agent Appropriate amount Purified water residue

Example 11 Emulsion Type Lipstick Titanium Oxide 4.5 Dye 2.0 Ceresin 4.0 Candelilla wax 8.0 Carnauba wax 2.0 Castor oil 30.0 Hydroxystearic acid oligomer 5.0 Isostearic acid diglyceride 35. 0 POE (25) POP (20) 2-tetradecyl ether 1.0 Purified water Residue Glycerin 2.0 Propylene glycol 1.0 Anti-UV agent Suitable amount Perfume Appropriate Preservative Appropriate

(Example 12) Bath agent (milk type) Rapeseed oil 10.0 Sunflower oil 10.0 Squalane 10.0 Macadamia nut oil 3.0 Sorbitan oleate 3.0 POE oleyl ether 6.0 Hydroxystearic acid oligomer 3 0.0 Glycerin 15.0 Purified water Residual perfume Appropriate pigment Appropriate preservative Appropriate

Example 13 Hair Rinse Silicone Oil 3.0 Liquid Paraffin 1.0 Hydroxystearic Acid Oligomer 0.5 Cetyl Alcohol 2.5 Stearyl Alcohol 1.5 Stearyl Trimethylammonium Chloride 0.5 Alkyloxyhydroxypropylarginine Hydrochloride 0.5 Amidoamine glutamate 0.5 Glycerin 3.0 Preservatives Appropriate amount Purified water residue

[0032]

EFFECTS OF THE INVENTION The cosmetics and external preparations for skin of the present invention which use water, oil, surfactant and hydroxystearic acid oligomer in combination have high stability and safety, and are excellent in moisturizing, emollient and feel.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61K 7/025 A61K 7/025 7/08 7/08 7/50 7/50 F-term (Reference) 4C083 AA082 AA112 AA122 AB032 AB051 AB242 AC012 AC022 AC072 AC102 AC122 AC132 AC182 AC352 AC392 AC402 AC422 AC432 AC442 AC482 AC582 AC642 AC662 AC692 AD042 AD052 AD091 AD092 AD152 BB01 BB11 CC02 CC05 CC12 CC13 CC23 CC25 CC39 DD23 DD31 DD41 EE01

Claims (1)

[Claims] 1. A cosmetic or external preparation for skin comprising water, oil, a surfactant and a hydroxystearic acid oligomer.