JP4554404B2 - Liquid oily cosmetics - Google Patents

Description

  The present invention relates to a liquid oily cosmetic, and more specifically, a liquid that does not become cloudy even when used on wet hands or skin, and has a good feeling of after-skin after use, without a feeling of washing residue or stickiness. It relates to oily cosmetics.

  Liquid oily cosmetics, especially transparent cleansing cosmetics, are known to contain oily components and become cloudy when used on wet hands and skin, resulting in poor appearance and a reduction in cleansing power.

  In order to solve such problems, cleansing cosmetics containing an oil component and a surfactant having a specific IOB or HLB have been reported (Patent Documents 1 to 5).

JP 2004-2292 A JP 2004-115467 A JP 2004-75566 A JP 2004-26791 A JP 2004-238376 A

  However, although the above-mentioned cleansing cosmetics have been improved with respect to white turbidity and a decrease in cleansing power when used on wet hands and skin, they have improved after-cleansing feeling after cleansing and so-called bad after-skin problems such as sliminess. Was not.

  As a result of intensive studies in view of the above circumstances, the present inventors have found that liquid oily cosmetics composed of specific surfactants and oils have white turbidity and cleansing power when used on wet hands and skin. The present invention was completed by finding that the deterioration of the skin after the cleansing was improved and the poor skin after cleansing was also improved.

That is, the present invention includes the following components (a) to (c),
(A) an ethanolamide surfactant having a molecular formula represented by the following formula (I):
RNR ₁ R ₂ (I)
(In the formula (I), R represents an acyl group having 12 to 22 carbon atoms, R ₁ represents CH ₂ C
H ₂ O (CH ₂ CH ₂ O) _m H, R ₂ is CH ₂ CH ₂ O (CH ₂ CH ₂ O) _n H
Or H and n and m each represent an integer of 0 to 20)
(B) a HLB4 or lower surfactant having a glycerin skeleton,
(C) an oil component that is liquid at room temperature;
A liquid oily cosmetic composition comprising 100 parts by mass of the liquid oily cosmetic composition and 1 part by mass of water, wherein the light transmittance at 660 nm is 50% or more. A fee is provided.

  The liquid oily cosmetic composition of the present invention can be used without problems such as white turbidity of the cosmetic composition and reduced cleaning power even when the hands and skin of the bathroom are wet, and after cleansing. It is excellent with good skin.

  The ethanolamide surfactant of component (a) used in the liquid oily cosmetic composition of the present invention is represented by the following formula (I), specifically, coconut oil fatty acid diethanolamide, lauric acid diethanolamide, myristic Examples include acid diethanolamide, polyoxyethylene coconut oil fatty acid diethanolamide, and the like, and one or more of these can be used.

RNR ₁ R ₂ (I)
(In the formula (I), R represents an acyl group having 12 to 22 carbon atoms, R ₁ represents CH ₂ C
H ₂ O (CH ₂ CH ₂ O) _m H, R ₂ is CH ₂ CH ₂ O (CH ₂ CH ₂ O) _n H
Or H and n and m each represent an integer of 0 to 20)

  Among these ethanolamide surfactants, coconut oil fatty acid diethanolamide, lauric acid diethanolamide and polyoxyethylene (5) coconut oil fatty acid monoethanolamide are preferable. These ethanolamide surfactants are preferably blended in the liquid oily cosmetic composition of the present invention in an amount of 5 to 10% by mass.

  Further, as the surfactant having a glycerin skeleton of the component (b) used in the liquid oily cosmetic composition of the present invention having an HLB of 4 or less, diglyceryl monostearate, diglyceryl oleate, glyceryl diisostearate, decaglyceryl monooleate, Examples include polyoxyethylene glyceryl triisostearate, polyoxyethylene glyceryl tristearate, polyoxyethylene glyceryl distearate, polyoxyethylene glyceryl trioleate, diglyceryl diisostearate, diglyceryl triisostearate, and the like. Or 2 or more types can be used. Among these surfactants, diglyceryl monostearate (HLB = 2), diglyceryl oleate (HLB = 2.5), glyceryl diisostearate (HLB = 2) and decaglyceryl monooleate (HLB = 3.5) Is preferred. These surfactants are preferably incorporated in the liquid oily cosmetic composition of the present invention in an amount of 2 to 10% by mass, more preferably 2 to 5% by mass. The component (b) is preferably blended in a mass ratio of 1: 0.25 to 1: 1.25, preferably 1: 0.25 to 1: 1 with respect to the component (a).

  Furthermore, the oil component that is liquid at room temperature of the component (c) used in the liquid oily cosmetic composition of the present invention includes olive oil, avocado oil, macadamia nut oil, corn germ oil, almond oil, safflower oil, kyounin oil, linseed oil, Wheat germ oil, sesame oil, rice germ oil, rice bran oil, soybean oil, corn oil, jojoba oil, mink oil, cottonseed oil, coconut oil and other vegetable oils, liquid oils such as liquid paraffin, squalene and squalane, trimethylol triisostearate Propane, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl isooctanoate, cetyl octanoate, oleic acid Oleyl, octyldodecyl oleate, Neopentyl glycol caprate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, glyceryl trioctanoate, glyceryl tribehenate, rosin acid pentaerythritol ester, neopentyl glycol dioctanoate, oleic acid, linoleic acid, Fatty acids such as linolenic acid and isostearic acid, silicones such as methylpolysiloxane, methylphenylpolysiloxane, ethylpolysiloxane, ethylmethylpolysiloxane, ethylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, etc. 1 type or 2 types or more can be used. These oil components are preferably blended in an amount of 20 to 90% by mass in the liquid oily cosmetic composition of the present invention. Further, these oil components include 30 to 30 unsaturated fatty acids among the fatty acids constituting triglycerides such as rice bran oil, rice germ oil, olive oil, avocado oil, macadamia nut oil, corn germ oil, almond oil, safflower oil, and kyounin oil. It is preferable that the vegetable oil which is 100 mass% is included. The vegetable oil is preferably contained in the component (c) in an amount of 30 to 100% by mass, particularly 40 to 95% by mass. Furthermore, these oil components preferably contain volatile silicone oil in addition to the vegetable oil. The preferable compounding quantity of volatile silicone oil is 1-30 mass% in a component (c). In the present invention, the liquid at normal temperature has fluidity when used in a general use state, and specifically indicates a liquid having a viscosity value at 20 ° C. in the range of 40,000 mPa · s or less.

  The liquid oily cosmetic composition of the present invention is composed of the above components (a) to (c), and in the light wavelength region of 660 nm of a mixture obtained by mixing 100 parts by mass of the liquid oily cosmetic composition and 1 part by mass of water. The transmittance is 50% or more. The transmittance is measured with a spectrophotometer after filling a glass cell having an optical path length of 10 mm × optical path width of 10 mm with 100 parts by mass of the product of the present invention and adding 1 part by mass of water. Note that purified water was used as a reference.

  The liquid oily cosmetic of the present invention also has a property that it does not instantly become cloudy when 1 part by weight of water is dropped on 10 parts by weight of the liquid oily cosmetic. The occurrence of the white turbidity is determined by the appearance of the liquid oily cosmetic material hanging on a polyvinylidene chloride resin sheet (trade name: Saran Wrap, manufactured by Asahi Kasei) and then whitening immediately after the water is dropped on it.

  In the liquid oily cosmetic composition of the present invention, in addition to the above components, surfactants other than the components (a) and (b), polyhydric alcohols, lower alcohols, gelling agents, Powders, preservatives, ultraviolet absorbers, pigments, fragrances, cosmetic ingredients, water-soluble ingredients, and the like can be added.

  The liquid oily cosmetic composition of the present invention thus obtained does not become cloudy even when used with wet hands or skin, and has an excellent after-skin after use. Accordingly, the liquid oily cosmetic composition of the present invention can be suitably used for a cosmetic composition such as a massage composition or a cleansing composition that is expected to be used in, for example, a bathroom or a bathroom, and preferably a cleansing cosmetic composition.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Examples Liquid oily cosmetics having the compositions shown in Tables 1 to 3 were prepared by a conventional method, and the following evaluation methods were used for light transmittance when mixed with water, cloudiness when added with water, cleansing power, and stickiness after washing. The lack of skin (skin condition after cleansing) was evaluated and judged. The determination results are also shown in Tables 1-3.

Evaluation methods:
(1) Light transmittance at the time of mixing with water A glass cell having an optical path length of 10 mm × optical path width of 10 mm is filled with 100 parts by mass of the product of the present invention and a comparative product and mixed with 1 part by mass of water. Then, the transmittance in the visible part (660 nm) was measured, and the transparency was evaluated. Purified water was used as a reference.
(Evaluation) (Judgment)
Transmittance 50% or more: ○
Transmittance 30% or more and less than 50%: △
Transmittance less than 30%: ×

(2) clouded present invention product 1g of polyvinyl chloride Ride down the resin sheet at the time of the addition of water (trade name: Saran Wrap, manufactured by Asahi Kasei) dropped in, and further 0.1g water is added dropwise, visually whether clouded momentarily Was observed and evaluated.
(Evaluation) (Judgment)
Instantly no cloudiness: ○
Instantly cloudy: ×

(3) Cleansing power and no stickiness after washing (skin condition after cleansing)
After having a W / O liquid foundation and lipstick used normally by 10 professional panels, cleanse with wet hands using the product of the present invention and comparative product, cleansing power and no stickiness after washing A sensory test was performed on. The sensory test was evaluated in 7 stages based on the following absolute evaluation criteria, and was determined based on the following criteria based on the average value of scores given by 10 expert panels for each sample.
<Absolute evaluation criteria>
(Score) (Rating)
6: Very good 5: Good 4: Somewhat good 3: Normal 2: Somewhat bad 1: Bad 0: Very bad <Criteria>
(Average score) (Judgment)
4.5 or more: ○ (good)
2.5 or more and less than 4.5: △ (somewhat good)
Less than 2.5: × (defect)

  From Tables 1 to 3, the liquid oily cosmetic of the present invention did not become cloudy even when mixed with water, had good cleansing power, and had no sticky feeling after cleansing.

The liquid oily cosmetic composition of the present invention is so-called without any white turbidity, loss of detergency, etc. even after the hands and skin are wet, and without any residual feeling after washing, no stickiness, etc. The back skin is good. Therefore, it can be suitably used as a cleansing cosmetic.

more than

Claims (5)

The following components (a) to (c),
(A) an ethanolamide surfactant having a molecular formula represented by the following formula (I):
RNR ₁ R ₂ (I)
(In the formula (I), R represents an acyl group having 12 to 22 carbon atoms, R ₁ represents CH ₂ C
H ₂ O (CH ₂ CH ₂ O) _m H, R ₂ is CH ₂ CH ₂ O (CH ₂ CH ₂ O) _n H
Or H and n and m each represent an integer of 0 to 20)
(B) a HLB4 or lower surfactant having a glycerin skeleton,
(C) an oil component that is liquid at room temperature;
A liquid oily cosmetic composition comprising 100 parts by mass of the liquid oily cosmetic composition and 1 part by mass of water, wherein the light transmittance at 660 nm is 50% or more. Fee.   The liquid oily cosmetic according to claim 1, wherein the component (c) contains a vegetable oil in which the unsaturated fatty acid is 30 to 100% by mass of the fatty acid constituting the triglyceride.   Furthermore, the liquid oily cosmetics of Claim 2 in which a component (c) contains volatile silicone.   The liquid oily cosmetic according to any one of claims 1 to 3, wherein the blending mass ratio of the component (a) and the component (b) is 1: 0.25 to 1: 1.25. The liquid oily cosmetic according to any one of claims 1 to 4, which is a cleansing cosmetic.