JPS6019727B2 - Improved cream skin cosmetics - Google Patents

Description

Detailed Description of the Invention The present invention is extremely stable, does not precipitate pearl-like crystals of higher fatty acids, does not soften, does not change in feel, etc. even after long-term storage, gives a good feel, and is uniformly stable. This invention relates to a creamy skin cosmetic emulsified in

Conventionally, milky white creams are produced by reacting and emulsifying higher fatty acids such as stearic acid with bases such as willow sand and trietanoamine, but over time, pearl-like crystals precipitate out, giving them a pearl-like luster. It is also well known that it softens and becomes rough to the touch.

The appearance and feel of such products gradually change over time, which can cause discomfort to consumers, give them a different image, and cause them to be perceived as different products. many. On the other hand, behenic acid has recently come to be used as a cosmetic raw material because it is less irritating to the skin, but because it precipitates pearl-like crystals more easily than stearic acid, it gives products a pearl-like luster. It is stated in the IQ Hoko Product Raw Materials Standards (published by Yakuji Nipposha) that it is used when As a result of intensive research aimed at improving the above-mentioned drawbacks of milky white creams containing higher fatty acids such as stearic acid, the present inventors have found that a specific amount of behenic acid is co-used with a specific oily substance, and a specific amount of When emulsifying nonionic surfactants and higher alcohol sulfate ester salts in combination, the emulsification is uniform and stable, preventing the precipitation of pearl-like crystals, hardening changes, and deterioration of texture that tend to occur during long-term storage. The present invention was completed based on the discovery that creamy skin cosmetics can be obtained.

The purpose of the present invention is to be extremely stable even after long-term storage without causing precipitation of pearl-like crystals of higher fatty acids, hardening changes, or deterioration of texture, and to provide a good feeling without irritating the skin. An object of the present invention is to provide a creamy emulsified skin cosmetic.

That is, in the present invention, the oily substance contained as the main component is a linear higher fatty acid having 14 to 18 carbon atoms, and 14 to 2 carbon atoms.
2 higher alcohol, liquid hydrocarbon and behenic acid,
The emulsifier is a nonionic surfactant selected from the group consisting of polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene higher alkyl ether, and sorbitan fatty acid ester, and a higher alcohol sulfate ester salt; The behenic acid content is 2 relative to the weight of the linear higher fatty acid.
5.0-60. % by weight, and the content of higher alcohol sulfate ester salt is 2.0 to 25% by weight based on the weight of the linear higher fatty acid. This is an improved creamy skin cosmetic product, characterized in that it has a weight percent of Hereinafter, embodiments of the present invention will be explained in detail. Carbon number 14 to 1 used in the present invention
Examples of straight mirror higher fatty acids of No. 8 include myristic acid,
Stearic acid, palmitic acid, 12-hydro.

Examples include xystearic acid. The amount of the linear higher fatty acid used is 2 to 15% by weight, preferably 4.0 to 13.0% by weight, based on the weight of the composition.

Examples of higher alcohols having pine carbon atoms of 14 or more include cetyl alcohol, stearyl alcohol, oleyl alcohol, myristyl alcohol, isostearyl alcohol, behenyl alcohol, 2-hexyldecanol,
Examples include 2-octyldodecanol and 2-heptylundecanol.

The amount of the higher alcohol used is 0.0% based on the weight of the composition.
1 to 7.0% by weight, preferably 0.5 to 5.0% by weight.

In addition, aliphatic alcohols with less than 1 carbon number are highly irritating and have poor emulsifying properties.

Next, preferred examples of liquid hydrocarbons include liquid paraffin, squalane, and blistane. The amount of liquid hydrocarbon used is between 3 and 5% by weight, preferably between 5 and 45% by weight, based on the weight of the product.

The amount of behenic acid used is 25 to 6% by weight, preferably 30 to 55% by weight, based on the content (weight) of the higher fatty acid.

If the amount of behenic acid used is less than 25% by weight based on the weight of the higher fatty acid, pearl-like crystals tend to precipitate during long-term storage, and the texture tends to become dull. Moreover, if the amount exceeds 6% by weight, pearl-like crystals tend to precipitate during long-term storage, and hardening changes tend to occur, which is not preferable. still,
In this case, even if a related higher fatty acid such as arachidic acid or gnoceric acid is used in place of behenic acid, disadvantages such as precipitation of pearl-like crystals and changes in texture during long-term storage cannot be improved, and the The specificity of the effects of henic acid is remarkable.
Polyoxyethylene sorbitan fatty acid esters of nonionic surfactants used as emulsifiers include, for example, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, and polyoxyethylene sorbitan monolaurate. Ethylene sorbitan monooleate, polyoxyethylene rubitan olive oil fatty acid ester, polyoxyethylene sorbitan triolate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan hydrogenated castor oil fatty acid ester, polyoxyethylene sorbitan monoisostear Examples of the polyoxyethylene sorbitan fatty acid ester include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan castor oil fatty acid ester, and polyoxyethylene sorbitan monolaurate. Preferred examples include polyoxyethylene sorbitate monopalmitate, polyoxyethylene tetraoleate, and polyoxyethylene hexastearate.

Examples of polyoxyethylene higher alkyl ethers include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene behenyl ether, polyoxyethylene lauryl ether, Polyoxyethylene hexyldecyl ether, polyoxyethylene tetradecyl ether, polyoxyethylene tridecyl ether, polyoxyethylene isostearyl ether, polyoxyethylene lanolin alcohol, polyoxyethylene abiethyl ether, etc. are sorbitan fatty acids. Examples of esters include sorbitan monolaurate, sorbitan mono/gulmitate, sorbitan monostearate, sorbitan sesquistearate, sorbitan monooleate, sorbitan sesquiolate, sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan monotol oil fatty acid Estel etc. are shown as preferred examples. The above-mentioned nonionic surfactants may be used alone or in combination of two or more.

The amount used is 0.5 to 5.0% by weight based on the weight of the composition.
, preferably 1.0 to 4.0% by weight. The higher alcohol sulfuric acid ester salt has the general formula ROS03A (wherein R is an alkyl group or alkenyl group having 12 or more carbon atoms, and A is sodium, potassium, N ratio, and alkal/alamine.

), and particularly preferred examples include sodium lauryl sulfate, potassium lauryl sulfate, sodium myristyl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, and trietanoamine lauryl sulfate.

Higher alcohol sulfate ester salts may be used singly or in combination. The amount used is 2.0 to 25% based on the weight of the linear higher fatty acid. % by weight, preferably 4.0
~20. % by weight. 2. If the amount is less than 25% by weight, the emulsifying property becomes weak. If the amount exceeds the weight percentage of , it is not preferable because pearl-like crystals tend to precipitate due to emulsifying properties, texture, and during long-term storage.

The amount of water used is usually 30 to 9% by weight, preferably 40 to 8% by weight, based on the weight of the composition. In addition to the above-mentioned main components, the cream-like flavoring material of the present invention usually contains conventional additives such as fragrances, colorants (dyes, pigments), and preservatives. ,
Known humectants such as glycerin and diglycerin can also be added. The creamy skin cosmetic of the present invention contains about 70% to
Manufactured by applying a known emulsification method such as heating and dissolving to 80 qo, mixing and emulsifying the oil phase with an aqueous phase in which higher alcohol sulfate ester etc. are dissolved, and adding fragrance during the cooling process. be done.

In the cream skin cosmetic of the present invention, the oily substance is substantially composed of the specific higher fatty acid, higher alcohol, behenic acid, and liquid hydrocarbon, and the oily substance is composed of the specific nonionic surfactant and higher alcohol sulfate. It forms a beautiful milky white cream that is uniformly and stably emulsified, giving it a pearl-like luster.Behenic acid and higher alcohol sulfate ester prevent the precipitation of pearl-like crystals of higher fatty acids and pearls even after long-term storage. It has excellent stability without causing any appearance of gloss, change in hardness, or softening, and provides a pleasant feeling when used, without irritation.
It has a high commercial value, such as good spreadability, and is extremely useful as, for example, foundation cream, massage cream, skin cream, vanishing cream, neutral cream, cold cream, hand cream, etc.

Examples of the present invention will be described in detail below.

In the examples, % means % by weight, and parts mean parts by weight. Example 1 '1} Composition of the present invention Upper female liquid'! 1 Kamitou Hiragi! 2 ■Stearic acid (parts) 3 parts 3 parts 4.5 parts Thumirmitic acid 3 3 4.5■
Behenic acid 3 ■ Liquid paraffin 6
6 6■ Cetyl alcohol 3 3 3■
Polyoxoethylenecetyl 2 2 2 ether (day.

〒15 Moshi) ■ Sodium cetyl sulfate 1 1
1◎Beeswax −3 −■
Fragrance 0.5 05 05 ■ Prevention
Preservative Appropriate amount Appropriate amount Appropriate amount ■ Water
78.5 78.5 78.5'2} Manufacturing method 1 Components ■, ■, ■, ■, ■ and ■ or ■ were heated to 80° C. and mixed together to obtain an oil phase.

2 Add an aqueous solution (80 o
Add the aqueous phase of step o) and emulsify while stirring.

3 This emulsion was cooled to 60 qo, and component (1) was added and mixed, and the emulsion was cooled to 20 qo to produce each vanishing cream.

'3' Storage stability, feel and hardness characteristics during use of each emulsion (vanishing cream) Present invention Comparative example 1 Comparative example 2 After 1 month Uniform, stable. Only a few K pearls A large amount of pearls with irregularities Precipitated crystals Vertical stripes precipitated 6
Months later Same as Kamizumakangama student dormitory Same as above 1 year later Same as above Same as above Same as above Feeling during use Good, Poor, Poor, 1 year storage Changed Significant change Significant change Hardness Immediately after manufacture 10.5 10.0 10 .01 month later 10.0 7.0 4.5, 1 year later
9.5 5.0 2.5 As is clear from the above results, the behenic acid-containing vanishing cream of the present invention is superior to the behenic acid-containing vanishing creams of Comparative Example 1 and Comparative Example 2. The stability during long-term storage and the feel during use are significantly superior.

Example 2 m composition Component Invention 1 Invention 2 Invention 3
Comparative example 1 Comparative example 2 ■Stearic acid 10 5
12 10 7 ■Behenic acid 4.5
1.3 7.2 2 5 ■ Cetyl alcohol 1.5 3,5 1.
0 1.5 1.5 ■Polyoxyethylene cetyl 3 3.5 2.5 3
3 ethers BO = 15 moles) ■Liquid paraffin
10 10 15 10 10■ Sodium cetyl sulfate 0.7 0.5
1.5 0.7 0.7■Fragrance
0.5 0.5 0.5
0.5 0.5■Preservative appropriate amount
Appropriate amount Appropriate amount Appropriate amount Appropriate amount ■ Water
69.8 75.7 60.3 71.8 7
1.8 (2' Production method 1) Ingredients (1), (2), (2), (2) and (2) were added to 80 °C and mixed together to obtain an oil phase.

2. A watery skin liquid (80%
℃) is added to the water phase to form hair while crossing the ocean.

3 This emulsion was cooled to 60 oo, and component (1) was added and mixed, and the emulsion was cooled to 2,000 oo to obtain each neutral cream.

[3} Storage stability, feel and hardness characteristics during use of each emulsion (neutral cream) Appearance Invention 1 Invention 2 Invention 3 Comparative Example 1 Comparative Example 2 After 1 month Uniform stability Uniform stability Uniform stability Large amount Pearl Small amount of pearl No abnormality No abnormality No abnormality
Precipitation of crystals 6 months after precipitation of crystals Same as above
Same as above Same as above Same as above A large amount of pearl-like results are deposited after 1 year Same as above Same as above Same as above Same as above Improved ■Feel during use Very good, good "Unchanged Good,
Unchanged Poor, changed Poor, markedly changed (1 year later)
Unchanged■Hardness Immediately after manufacturing 15 13 16
14.5 161 months later 14 12 1
5 8 111 years later 13
11 14.5 5 8 As is clear from the above results, the amount of behenic acid added is 25 to 6% relative to the weight of linear higher fatty acid (stearic acid).
When it is 0% by weight, a neutral cream that is uniformly stable, exhibits a beautiful milky appearance, and has a good texture without precipitation of pearl crystals, changes in hardness, or changes in texture even after long-term storage can be obtained. .

However, if the amount of behenic acid added is outside the above range, pearl-like crystals will precipitate after one month, give a bad texture, and cause changes in texture and hardness when stored, which is not preferable. Example 3 Instead of polyoxyethylene cetyl ether, polyoxyethylene (EO = 20 mol), sorbitan monostearate (Yuzu.1), polyoxyethylene (EO = 20 mol), sorbitan monopalmitere (No. 1) were used. 2), polyoxyethylene (EO = 20 mol) lauryl ether (M
．． 3) and sorbitan monostearate (M.4) were used in the same manner as in Example 1 of the present invention.

The appearance, storage stability, feel during use, and hardness of each vanishing cream obtained are as follows. Item Cream Record Mother Pig 1 Armpit 2 Female 3 Armpit 4 (1) Appearance, after the month of power Samewarabi and others Same left Same left Same left Same left Same left Same as left Same as left Same as left Same as left Same as left Same as left Same as left Same as left Same as above Same as left Same as left Same as left Same as left Same as left Same as above Same as left Same as left Same as left Same as left Same as above Same as left Same as left Same as left Same as above Same as left Same as left 1 year later Same as above Same as left Same as left (2 hoofs) Rice rut (1 year storage without malt abnormality) Same as left Same as left (3) Hardness Immediately after production 11.0 11.5 10.5 11.
51 months later 10.5 11.0 10.0 11
．． 01 years later 10.0 10.5 9.5 10
．． 5 Example 4 [11 Composition Invention Invention 1 Invention 2 Kamimehiragiyama ■ Stearic acid 5 parts 12.2 parts 20 parts ■ Behenic acid
1.3 7.8◎Tyli Alcohol 5
1 1 ■Polyoxyethylene solpitan monoste 2 0.6 0.6 arate (20
80) ■Solpitanmonos 1 0.6 0
．． 6 Tear rate■Liquid paraffin 30 12
12■Sodium cetyl sulfate 0.3 1■Triethanolamine - - 0.5■Caustic potash - - 0.2■Fragrance
015 05 05 ■Preservative
Appropriate amount Appropriate amount Appropriate amount ■ Water 52.9
64.3 64.6 legs Manufacturing method 1 Ingredients ■, ■,
(2), (2) and (2) or (2) were heated to 80 qo and mixed under condensation to obtain an oil phase.

2 This oil phase contains components ■, ■, ■, ■, and ■8.
000 aqueous solution (aqueous phase) is added and emulsified under Nada Azusa.

3 This emulsion was cooled to 60 oo, and component (2) was added and mixed, and the emulsion was cooled to 20 oo to obtain cream. '3
- Appearance, storage stability, feel and hardness characteristics during use of the cream Invention 1 Invention 2 Kamitorhishiri 1 (1) Appearance after 1 month Fu Hi Fu Fu Hiru No abnormalities in the army's harle No abnormalities on silk skewers Improved 6 months after depositing the report Same as above Improved after 12 months Same as above Same as above Same as above Examples of hoof rut-feeling hornworms Sea bream, Spots/Defects/ (Number kept for 1 year No change No change Significant change (3 hardness Immediately after production 13 15 15 1 month later 12 15 8 12 months later 11 14 7 As above,
By adding 25 to 6% by weight of behenic acid to the weight of stearic acid (linear higher fatty acid) (as in the present invention in Example 2), thearin can be maintained uniformly and stably even during long-term storage. A cream with good appearance and feel can be obtained without precipitation of acid pearl crystals, change in hardness, change in feel, etc.

Furthermore, if a basic substance is used without using behenic acid and higher alcohol sulfate ester, precipitation of pearl-like crystals, change in texture, and hardening cannot be prevented. Comparative Example 1 0.5 parts of trietanoamine and 0.2 parts of caustic potassium were used in place of 1 part of sodium cetylate, and 64 parts of water was used.
The same procedure as in Invention 2 of Example 4 was carried out except that 6 parts were used.

The resulting cream precipitated a large amount of pearl-like crystals after being left for one month, had a very rough texture, and had a hardness of 10% immediately after production.
One month later, it dropped to 7.5.

Claims (1)

[Claims] 1. The oily substance contained as the main component has 14 to 14 carbon atoms.
18 linear higher fatty acids, higher alcohols having 14 to 22 carbon atoms, liquid hydrocarbons, and behenic acid, and the emulsifiers are polyoxyethylene soltan fatty acid esters, polyoxyethylene sorbitic fatty acid esters, polyoxyethylene higher alkyl ethers, at least one nonionic surfactant selected from the group consisting of sorbitan fatty acid esters and a higher alcohol sulfate ester salt, and the behenic acid content is 25.0 to 60% based on the weight of the linear higher fatty acid. .0% by weight, and the content of the higher alcohol sulfate salt is 2.0 to 25.0% by weight based on the weight of the chain higher fatty acid. . 2 Behenic acid is 3% relative to the weight of linear higher fatty acids.
The cosmetic according to claim 1, which contains 0.0 to 55.0% by weight. 3 Linear higher fatty acid is 2.0 to 2.0 to the weight of the composition
The cosmetic according to claim 1, containing 15.0% by weight. 4. The cosmetic according to claim 1, wherein the higher alcohol having 14 to 22 carbon atoms is contained in an amount of 0.1 to 7.0% by weight based on the weight of the composition. 5 The liquid hydrocarbon is 3.0 to 50% of the amount of the composition.
．． The cosmetic according to claim 1, which contains 0% by weight. 6. The cosmetic according to claim 1, wherein the liquid hydrocarbon is liquid paraffin, squalane, blistane, or a combination thereof. 7. The cosmetic composition according to claim 1, wherein the higher alcohol sulfate ester salt is contained in an amount of 4.0 to 20.0% by weight based on the weight of the linear higher fatty acid. 8 A patent in which the higher alcohol sulfate ester salt is represented by the general formula ROSO_3A (in the formula, R is an alkyl group or alkenyl group having 12 to 22 carbonates, and A is sodium, potassium, NH_4, or alkanolamine) Cosmetics according to claim 1. 9 The nonionic surfactant is 0.5% by weight of the composition.
5.0% by weight of the cosmetic according to claim 1. 10. The cosmetic according to claim 1, wherein water is contained in an amount of 30 to 90% by weight based on the weight of the composition.