JPH01266844A - Emulsified composition - Google Patents

Abstract

PURPOSE:To improve the emulsified state of an emulsified compsn. and the stability over a long period by blending an adduct of polyoxyethylene to >=22C higher alcohol with lower alcohol and an oil component to prepare the emulsified compsn. CONSTITUTION:The adduct of polyoxyethylene to >=22C higher alcohol is blended with lower alcohol and the oil component or further blended with additives such as a thickener, an org. pigment and a fungicide to prepare an emulsified compsn. the higher alcohol may be behenyl alcohol or carnaubyl alcohol and about 1-30mol polyoxyethylene is preferably added to the higher alcohol. The lower alcohol is <=5C alcohol and the pref. amt. of the lower alcohol used is 5-40wt.%. The oil component may be selected among fats, oils, waxes and hydrocarbons and the pref. amt. of the oil component used is 0.5-80wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an emulsified composition stably containing a high concentration of low alcohol.

Conventional Technology In the field of cosmetics, lower alcohols provide a cooling and quick-drying sensation to the skin and hair, as well as have astringent, cleansing, sterilizing, and drying accelerating effects.They are also used in lotions to increase the solubility of drugs. It is widely used in liquid preparations such as tonics and tonics.

Further, emulsions such as milky lotions and creams are a comprehensive dosage form of basic cosmetics used to supplement oil components and moisture to the skin and hair, that is, as a substitute for the sebum film.

This emulsified dosage form is not only for moisturizing and softening purposes, but also for promoting blood circulation in the skin, depending on its purpose and function.
skin cleansing/makeup removal cleansing), makeup base,
It is used as a basic dosage form for UV protection, hair removal, hair styling, etc.

However, when a large amount of lower alcohol is added, the hardness and viscosity of the system decreases, causing problems in emulsion stability.

Therefore, an oil-in-water emulsion characterized by containing 01 to 10.0% by weight of higher fatty acids, 01 to 1 times (molar ratio) of basic amino acids and 5 to 30% by weight of lower alcohols to higher fatty acids. A composition has been invented and is well known (Japanese Patent Application Laid-Open No. 60-222142).

In this invention, the emulsified composition is stabilized using basic amino acids such as arginine, ornithine, lysine, oxylysine, and histidine, and a lower alcohol.

Problems to be Solved by the Invention However, although such conventional emulsifiers contain basic amino acids for stabilization, long-term stability may be affected depending on the type of base ion used and the pH of the composition. There is a problem with missing parts.

Means for Solving the Problem Generally, higher alcohols (C, or higher) have high lipophilicity and are used as oily bases and emulsion stabilizing agents for cosmetics.

It also has an affinity for lower alcohols such as ethyl alcohol that have a hydroxyl group.

However, the solubility in lower alcohols tends to decrease as higher alcohols have a large number of carbon atoms.

The present inventor focused on this property, and added polyoxyethylene to a higher alcohol having a large lipophilic property, that is, a relatively large number of carbon atoms. We believe that it can exhibit excellent interfacial adsorption power between the oil phase and the oil phase, and as a result of intensive study, we have developed an emulsifying composition containing a polyoxyethylene adduct compound of a higher alcohol having 22 or more carbon atoms, a lower alcohol, and an oil component. Invented it.

In the present invention, a higher alcohol having 22 or more carbon atoms is used as the higher alcohol to which polyoxyethylene is added, and preferably an alkyl alcohol having 22 or more carbon atoms such as behenyl alcohol, carnabil alcohol, seryl alcohol, myricyl alcohol, etc. use.

It is preferable to add polyoxyethylene to the higher alcohol in an amount of about 1 to 30 moles depending on the higher alcohol used.

In the present invention, methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, phtyl alcohol, and isobutyl alcohol.

An alcohol having a carbon number of 5 or less, such as pentanol, and benzyl alcohol are used as lower alcohols.

The blending amount is 5 to 40% by weight, preferably 10 to 40% by weight.
Use 30x i''A.

Oil components include oils and fats such as olive oil, mink oil, turtle oil, egg yolk oil, yang oil, and cacao oil, waxes such as beeswax and lanolin, hydrocarbons such as liquid paraffin, squalane, and petrolatum, and 2-ethylhexane. All kinds of oil components can be used, such as esters such as cetyl acid and isotridecyl myristate.

The blending amount is 0.5 to 80% by weight, preferably 5 to 50% by weight.

Further, the blending ratio of the polyoxyethylene adduct of higher alcohol and the oil component is preferably 1:2 to 1:10.

In addition to the above-mentioned components, the emulsified composition of the present invention includes other components that can be generally incorporated into emulsified compositions, such as polyhydric alcohols such as glycerin, propylene glycol, and 1,3-phthylene gelicol, thickeners, polymers, Organic pigments, powders, organic dyes, preservatives, bactericidal agents, fragrances, ultraviolet absorbers, vitamins, drugs such as hormones, metal ion sequestering agents, etc. can be blended.

In addition, in the emulsion composition of the present invention, other surfactants may be used in combination if necessary.

Function: In the emulsified composition according to the present invention, the polyoxyethylene added to the higher alcohol has appropriate hydrophilicity and lipophilicity at the interface between the aqueous phase component and the oil phase component containing the lower alcohol, and is adsorbed. Mix well.

Therefore, once emulsified, it remains stable and maintains its emulsified state even after a period of time has elapsed.

EXAMPLES The present invention will be explained in detail below according to specific examples.

[Example 6-1 Hair growth agent (loan mole emulsion) Of the base consisting of the following composition, about 60% of the oil phase component (including surfactant)
After heating to 0°C to dissolve uniformly, heat to approximately 60°C while stirring.
The heated aqueous phase components were added to emulsify the mixture, and then cooled (30°C) while stirring to prepare a hair growth agent.

Mink oil 6.0 weight ix Jojoba oil 20 weight XP, O,
E, (5) hehenyl ether 05Ei2P, O
, E, (10) Hehe = Lu r--Te4 1.5 weight x Glycerin 3.0 weight x Capsicum tincture 1,0Ei2
Cinnamon extract 3.0 weight x tocopherol acetate 0.1 weight x ethyl alcohol 25.0 Ei2 Fragrance, preservative Small amount of purified water Example 2 Hair conditioner (emulsion) with a total volume of 100.0 Ei2 Consisting of the following composition: After heating the oil phase component of the base to about 60°C and uniformly dissolving it, add the aqueous phase component heated to about 60"C while stirring to emulsify, and then cool while stirring. (30″c) A hair styling product was prepared.

Olive oil 10.0Ei2P,
O, E, (5) Hehe = Ether 3. Q weight tX chitinlikinto (-Jt farfus) 5.0 weight x 1.3-
Butylene Glyfur 3.0 weight x Ethyl alcohol 30.0 Ei2 Fragrance, preservative Small amount of purified water Make the total amount 100.0 Ei2 q Uni Cleansing Cream Of the base consisting of the following composition, the oil phase component is heated to about 6°C After heating and uniformly dissolving the mixture, the aqueous phase component heated to about 60° C. was added to emulsify while stirring, and then cooled (to 30° C.) while stirring to prepare a cleansing cream.

Isopropyl Valmitate 10.0Ei iX
Squalane 5.0Ei2henyl alcohol 02 weight XP, O, E
, (5) Hehe = Luer 2.0 weight itx purified soybean shintin 1.0 weight tx carboxin vinyl polymer 0.1! 1% potassium hydroxide
0.01 weight 23-methyl-1,3-
Butanediol 5.0wt x Ethyl alcohol 10.0Ei2Fragrance, preservative
Appropriate amount of purified water, total amount 1000
Weight: 2 and 1 box: 1 Sunscreen agent (emulsion) After heating the oil phase component of the base consisting of the following composition to about 60°C and uniformly dissolving it, heat it to about 60°C while stirring. A heated aqueous phase component was added to C to emulsify it, and then cooled (30°C) while stirring to prepare a sunscreen.

Cetyl 2-ethylhexanoate 5.51i J
tX; l f report') '/ a xane (350
C5) 0.5ffit
10 weight x ethyl alcohol 1
5.0Ei2 Fragrance, preservative A small amount of purified water Example-s in which the total amount is 100.0Ei2 Afternoon lotion The oil phase component of the base consisting of the following composition is heated to about 6°C and dissolved uniformly. After that, the aqueous phase components heated to about 60"C were added to emulsify them while stirring, and then cooled while stirring (30"C).
°C) and created an aftershave lotion.

Isooctyl isopelaulfonate 5. O heavy tXP
,O,E,<5>Behenylnychill 1.5Ei2P
, O, E, (20) Hehe = Rue-7-le 0,5fold i
tX allantoin 0.1 weight 1t
xQ-menthol 0.1 weight 2 propylene glycol 3.0 weight tz
Ethyl alcohol 10.01i: and fragrance, preservative, small amount of purified water
Test-1 in which the total amount was 100.0 Ei2 The emulsions obtained in Examples-1 to 5 were tested for emulsion stability and usability, and the results were as shown in Table-1.

Test method (1) A sensory test was conducted on the emulsified compositions of Examples 1 to 5 by 10 testers, and those that were judged to have a good feeling of use of 7 Å or more out of 10 were considered good, and 4 testers Those judged to be good by ~6 people were judged as average, and those judged to be 3 Å or less were judged to be poor.

Test method (2) The emulsion stability was tested after the product was left at room temperature and 40°C for one month.

Test-2 After heating the oil phase component of the base having the composition shown in Table 2 below to about 60°C and uniformly dissolving it, water heated to about 60'C while stirring The phase components were added and emulsified, and then cooled (30°C) with stirring to prepare an L-emulsion composition. Then, their emulsification states were compared and examined.

Table 2 Prescriptions and results Units are weight 2 Test 3 After heating the oil phase component of the base having the composition shown in Table 3 below to about 60°C and uniformly dissolving it, under stirring. Emulsification is carried out by adding the aqueous phase components heated to about 60°C,
Thereafter, the mixture was cooled (30° C.) while stirring to prepare four emulsion compositions.

The emulsion state and stability of the prepared emulsion compositions were compared, and the relationship with the number of carbon atoms in the alkyl group of the polyoxyenalene alkyl ether was investigated.

○: Good, Δ: Creaming, ×: It was found that the greater the number of carbon atoms in the separated alkyl group, the better the condition and the superior stability.

Test-4 Cleansing cream prepared in Example-3 and commercially available cleansing creams (commercial product a, commercial product b)
We compared and examined their cleansing effects.

(Test method) Apply lipstick in a circle with a diameter of 1 cTn on the back of the hand, take 1 g of each cleansing cream and rub it anywhere in a circular motion with your fingertips 10 times, then wash off the cleansing cream with 10°C water. .

The redness of the skin before and after cleansing was quantified using a color difference meter (Minolta CR-1 (TO)).

It was found that the product of Example 3 had superior cleansing power compared to commercially available products.

Test-5 The sunscreen created in Example-4 and a sunscreen with other substances added in place of the polyoxyethylene behenyl ether component were created, and the state of emulsification was compared and studied. (Table-5).

Table 5 Prescription and Results Level: *Hk''A Test-6 Based on the following formulation, an emulsifying composition was prepared by changing the type of surfactant as shown in Table 6, and immediately after emulsification. The condition, properties, and stability after one month of aging were examined.

Cetyl 2-ethylhexanoate 8. O heavy JtX surfactant (Table-6) 2.0 weight X ethyl alcohol 18.01ix Yuji Seisui 7
2.0 heavy tx (adjustment method) Heat the aqueous phase and oil phase to approximately 60°C, add the aqueous phase to the oil phase to emulsify, and after emulsification, cool while stirring 1↑, and cool to 30°C. Finish and get the product.

(Evaluation) (1) State immediately after emulsification Emulsification possible O... Smooth and uniform state ○... Uniform state △... Slightly uneven state Emulsification impossible ×... Separation or cleaning (2) Properties immediately after emulsification L: Lotion-like L2: Slightly viscous lotion H: Emulsion-like C: Cream-like (3) Stability conditions: Standard for one month storage at room temperature or 40°C: ○・
... Maintains stable condition △ ... Stability has decreased slightly Emulsified compositions were prepared in the same manner as in Example 7, and the emulsified state and properties immediately after emulsification and the stability after being left for one month were compared.

Oil component (Table 7) 8.0 weight Jiy.

P, O, E, <5) Hehenyl ethyl2. OJ t
X Ethyl alcohol 18.0 weight 2 Purified water 72.0 weight % (adjustment method) Heat the water phase and oil phase to approximately 60"C, add the water phase to the oil phase to emulsify, and stir after emulsification. Leave to cool,
Finish at 30°C to obtain the product.

(Evaluation method) (1) Condition immediately after emulsification Emulsification possible 0... Smooth and uniform state ○... Uniform state △... Slightly uneven state Emulsification impossible ×... Separation or creaminess]・(2) Properties immediately after emulsification L: Lotion-like LM: Slightly viscous lawn-like H: Emulsion-like C: Chestnut-like (3) Stability conditions: At room temperature or 40°C Criterion for leaving for 1 month: 20: Maintains stable condition △: Slightly decreased stability X: Separation or creaming table-7 Prescription and result effect Such an emulsified composition has 22 carbon atoms.
Since the oil phase component and aqueous phase component are emulsified using a compound obtained by adding polyoxyethylene to the above-mentioned higher alfur and a lower alcohol, the emulsified state is better than that of conventional emulsified compositions, and it is stable for a long time. can provide something.

Claims (5)

[Claims] (1) An emulsion composition characterized by containing a polyoxyethylene adduct of a higher alcohol having 22 or more carbon atoms, a lower alcohol, and an oil component. (2) The emulsified composition according to claim 1, wherein the higher alcohol is behenyl alcohol. (3) The emulsion composition according to claim 1, wherein the number of moles of polyoxyethylene added is 1 to 30 moles. (4) The polyoxyethylene adduct compound of higher alcohol is 0.1 to 10.0% by weight, and the lower alcohol is 5 to 4% by weight.
The emulsified composition according to claim 1, wherein the content is 0.0% by weight. (5) Claim 1, wherein the blending ratio of the oil component and the polyoxyethylene adduct of higher alcohol is 2:1 to 10:1.
The emulsifying composition described.