JP2014091734A - Cleansing cream - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleansing cream which has good compatibility with a makeup cosmetic applied to skin, effectively removes the makeup cosmetic, and can be washed away without sticking.SOLUTION: A cleansing cream comprises: (A) 1 to 4 mass% of a glycerol mono fatty acid ester; (B) 2 to 8 mass% of a polyoxyethylene addition type nonionic surfactant having HLB of 11 or more; (C) 45 to 65 mass% of an oil which is liquid at 25°C; (D) 0.5 to 5 mass% of a monohydric alcohol which is solid at 25°C and has a carbon number of 12 to 22; (E) sorbitol; and (F) water. A total content of components (E) and (F) is 30 to 45 mass%, and a mass ratio, (E)/(F), of the component (E) to the component (F) is 2/3 to 2/1.

Description

  The present invention relates to a cleansing cream that is well-familiar with makeup cosmetics, can effectively remove makeup cosmetics, and can be washed away without stickiness.

  Makeup cosmetics and UV protection cosmetics have the effect of making the skin beautiful and protecting the skin from external stimuli, and are indispensable in the lives of modern society. However, since these cosmetics contain a large amount of oily components and inorganic pigments, they block the pores of the skin, impede metabolism, and the cosmetics themselves are gradually oxidized. It may be a cause. For this reason, it is necessary to remove these cosmetics once a day using a cleansing material.

  Conventionally, as cleansing materials for makeup removal, liquid oils such as liquid paraffin, squalane and vegetable oil have been mainly blended, and these oily components are emulsified or solubilized by a nonionic surfactant. Moreover, the dosage form of the cleansing material marketed is various, such as cream, gel, and liquid. Among these, cream-type cleansing materials are called cleansing creams, and there are W / O type and O / W type emulsions mainly composed of oil. In the case of the W / O type emulsion, since the continuous phase is an oil phase, the cleansing effect is excellent, but the washing out property is poor. In the case of an O / W type emulsion, since the continuous phase is an aqueous phase, the cleansing effect is insufficient, makeup stains remain on the skin, and there is stickiness when washed off. On the other hand, in the case of an O / W type emulsion with a high internal phase, the cleansing effect is improved by inversion of the continuous phase from the aqueous phase to the oil phase during massage, and the continuous phase is changed from the oil phase to the aqueous phase during washing. Due to re-inversion, the washability is better than that of the W / O type emulsion. For high internal phase O / W emulsions, how to improve the familiarity with makeup cosmetics by accelerating phase inversion during massage while maintaining stability over time by adjusting the amount of each component. Is a development issue. Another issue of development is how to reduce stickiness after use by reducing the size of the emulsified particles at the time of washing.

  By adjusting the type and blending amount of surfactants, oils, etc., we have developed a cleansing cream that is well-familiar with make-up cosmetics, effectively removes make-up cosmetics, and can be washed away without stickiness. Has been tried. For example, Patent Document 1 discloses an emulsified composition comprising a surfactant such as polyoxyalkylene hydrogenated castor oil or polyoxyalkylene glyceryl fatty acid ester, a water-soluble polymer, an oil component and water. . Patent Document 2 discloses an emulsified composition comprising a specific polyoxyethylene glycerin fatty acid ester, polyglycerin mono fatty acid ester, and sucrose fatty acid ester.

  However, familiarity with makeup cosmetics is good, and cleansing creams that can effectively remove makeup cosmetics and can be washed away without stickiness have not been obtained, and such cleansing creams have been desired.

JP-A-11-43416 JP 2011-213664 A

  The object of the present invention is to provide a cleansing cream that is well-familiar with makeup cosmetics such as mascara, lipstick, and foundation applied to the skin, effectively removes the makeup cosmetics, and can be washed away without stickiness. There is to do.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have surprisingly blended components (A) to (F) described later at a specific ratio, and components (E) and (F). The present invention has been completed by finding that the above-mentioned problems can be solved by setting the mass ratio within a specific range.

That is, the present invention is as follows.
[1] 1-4 mass% of (A) glycerin monofatty acid ester,
(B) 2-8 mass% of polyoxyethylene addition type nonionic surfactant of HLB11 or more,
(C) 45 to 65% by mass of liquid oil at 25 ° C.
(D) 0.5 to 5% by mass of a monohydric alcohol having a carbon number of 12 to 22 that is solid at 25 ° C.
(E) sorbitol, and (F) water
The total content of components (E) and (F) is 30 to 45% by mass, and the mass ratio of components (E) and (F) is (E) / (F) = 2/3 to 2/1. Cleansing cream.
The cleansing claim of the present invention is an O / W emulsion.

  The cleansing cream of the present invention is well-familiar with makeup cosmetics such as mascara, lipstick and foundation applied to the skin, and can effectively remove the makeup cosmetics and can be washed away without stickiness. . That is, the cleansing cream of the present invention has a fast phase inversion during massage, and as a result, is well-familiar with makeup cosmetics. Moreover, the cleansing cream of the present invention has a small emulsified particle size at the time of washing, and as a result, stickiness after use (after washing off) is reduced.

  The cleansing cream of the present invention comprises (A) glycerin monofatty acid ester, (B) polyoxyethylene addition type nonionic surfactant of HLB11 or more, (C) oil at 25 ° C, (D) at 25 ° C. It is solid and contains a monohydric alcohol having 12 to 22 carbon atoms, (E) sorbitol, and (F) water. Hereinafter, each component will be described.

[(A) Glycerin monofatty acid ester]
The glycerin monofatty acid ester used in the present invention is a monoester of glycerin and a fatty acid. Glycerin monofatty acid ester is obtained by esterification reaction of fatty acid and glycerin, or transesterification reaction of fats and oils, fatty acid ester and glycerin. A product obtained by the reaction is classified as a reactive monoglyceride, and a product obtained by distilling the product is classified as a distilled monoglyceride. However, the type of the glycerin monofatty acid ester of the present invention is not particularly limited by the production method.

  As a fatty acid used as a raw material of the glycerol mono fatty acid ester used by this invention, a C10-C22 fatty acid is mentioned, A C12-C18 fatty acid is especially preferable. Specific examples of the glycerin monofatty acid ester used in the present invention include glycerin monolauric acid ester, glycerin monomyristic acid ester, glycerin monopalmitic acid ester, glycerin monostearic acid ester, and the like. Is preferred. Glycerin monofatty acid ester can be used alone or in combination of two or more, and it is preferably contained in an amount of 1 to 4% by mass, particularly 2 to 3% by mass, based on the total amount of the composition (cleansing cream). If the amount is less than 1% by mass, the stability over time cannot be maintained, and if it exceeds 4% by mass, stickiness is observed during washing.

[(B) Polyoxyethylene addition type nonionic surfactant having HLB of 11 or more]
Examples of the polyoxyethylene addition type nonionic surfactant used in the present invention include monohydric alcohol, fatty acid, or polyhydric alcohol fatty acid ester (for example, glycerin fatty acid ester, sorbitan fatty acid ester, sorbitol fatty acid ester). Polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene polyhydric alcohol fatty acid ester obtained by adding ethylene oxide (for example, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester) Ester). Furthermore, what added propylene oxide in addition to ethylene oxide (for example, polyoxyethylene polyoxypropylene alkyl ether) is also included.

  The monohydric alcohol used as a raw material for the polyoxyethylene alkyl ether and polyoxyethylene polyoxypropylene alkyl ether used in the present invention may be a linear or branched monohydric alcohol. 26 monohydric alcohols are mentioned, and monohydric alcohols having 14 to 24 carbon atoms are particularly preferred. Examples thereof include lauryl alcohol, stearyl alcohol, octyldodecyl alcohol, decyltetradecyl alcohol, and the like, and preferably octyldodecyl alcohol and decyltetradecyl alcohol. The number of moles of ethylene oxide added in the polyoxyethylene alkyl ether used in the present invention is preferably 8-30. In addition, the number of moles of ethylene oxide added in the polyoxyethylene polyoxypropylene alkyl ether used in the present invention is preferably 8 to 30, and the number of moles of propylene oxide added is preferably 1 to 10.

  Examples of the fatty acid used as a raw material for the polyoxyethylene fatty acid ester used in the present invention include fatty acids having 12 to 20 carbon atoms, and fatty acids having 14 to 18 carbon atoms are particularly preferable. Examples thereof include lauric acid, myristic acid, palmitic acid, and stearic acid, and stearic acid is preferable. The number of moles of ethylene oxide added in the polyoxyethylene fatty acid ester used in the present invention is preferably 8-30.

  Examples of the polyhydric alcohol fatty acid ester used as a raw material for the polyoxyethylene polyhydric alcohol fatty acid ester used in the present invention include glycerin fatty acid esters such as glycerin monolaurate, glycerin monostearate, and glycerin monooleate ( Fatty acid preferably has 12 to 18 carbon atoms), sorbitan fatty acid esters such as sorbitan monolaurate, sorbitan monostearate, sorbitan monooleate (fatty acid preferably has 12 to 18 carbon atoms), sorbitol triisostearic acid Examples include sorbitol fatty acid esters such as esters, sorbitol tetraisostearate, sorbitol tetraoleate (the fatty acid preferably has 12 to 18 carbon atoms). , Preferably sorbitan monostearate. The number of moles of ethylene oxide added in the polyoxyethylene glycerin fatty acid ester used in the present invention is preferably 10-40. As for the ethylene oxide addition mole number in the polyoxyethylene sorbitan fatty acid ester used by this invention, 10-40 are preferable. As for the ethylene oxide addition mole number in the polyoxyethylene sorbitol fatty acid ester used by this invention, 10-60 are preferable.

  Specific examples of polyoxyethylene addition type nonionic surfactants of HLB11 or higher used in the present invention include polyoxyethylene (25 mol) octyldodecyl ether, polyoxyethylene (15 mol) stearyl ether, poly Polyoxyethylene alkyl ethers such as oxyethylene (20 mol) decyl tetradecyl ether, polyoxyethylene (20 mol) polyoxypropylene (8 mol) cetyl ether, polyoxyethylene (25 mol) polyoxypropylene (4 mol) cetyl Ether, polyoxyethylene (20 mol) polyoxypropylene (6 mol) decyl tetradecyl ether, and other polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene (30 mol) stearates, polyoxyethylene (20 mol) myristic acid ester, polyoxyethylene fatty acid ester such as polyoxyethylene (14 mol) isostearic acid ester, polyoxyethylene (20 mol) sorbitan monostearate, polyoxyethylene (20 mol) sorbitan monoolein Acid esters, polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene (10 mol) sorbitan monolaurate, polyoxyethylene (15 mol) glycerol monoisostearate, polyoxyethylene (12 mol) glycerol monolaurate, polyoxy And polyoxyethylene glycerin fatty acid esters such as ethylene (20 mol) glycerin monooleate.

The HLB of the polyoxyethylene addition type nonionic surfactant used in the present invention is 11 or more. The HLB of the polyoxyethylene addition type nonionic surfactant used in the present invention is usually 18 or less. The HLB adopted the following calculation method proposed by Griffin.
(1) In the case of a nonionic surfactant obtained by adding ethylene oxide to a monohydric alcohol, HLB = E / 5
E:% by mass of the polyoxyethylene moiety contained in the surfactant molecule
(2) In the case of a nonionic surfactant obtained by adding ethylene oxide to a fatty acid or a polyhydric alcohol fatty acid ester, HLB = 20 (1-S / A)
S: Saponification value of nonionic surfactant (SV)
A: Oxidation of raw fatty acids (AV)

  The polyoxyethylene addition-type nonionic surfactant can be used alone or in combination of two or more, and is 2 to 8% by mass, particularly 3 to 6% by mass, based on the total amount of the composition (cleansing cream). It is preferable to contain. When the amount is less than 2% by mass, stickiness is caused at the time of washing, and when it exceeds 8% by mass, stability with time cannot be maintained.

  The mass ratio of (A) and (B) is preferably (A) / (B) = 1/4 to 1/1, and particularly preferably 1/3 to 1/2. If it is less than 1/4, the stability over time may not be maintained, and if it is greater than 1/1, stickiness may be caused during washing.

[(C) Oil liquid at 25 ° C.]
As the liquid oil at 25 ° C. used in the present invention, liquid oil usually used for cosmetics, pharmaceuticals and the like can be used. These liquid oils are selected from non-volatile oils and volatile oils. Nonvolatile oils include hydrocarbon oils (eg, hydrogenated polyisobutene (preferably hydrogenated polyisobutene having a kinematic viscosity of 3 to 25 mm ² / s at 37.8 ° C.)), ester oils (eg, ethylhexyl palmitate, isononyl isononanoate). In particular, hydrogenated polyisobutene is preferable in order to maintain the stability over time and enhance the cleansing effect, and a commercially available product is Pearl Ream EX (trade name: manufactured by NOF Corporation). Examples of volatile oils include low molecular weight hydrocarbon oils (for example, isobutene trimer), low molecular weight silicone oils (for example, decamethylcyclopentasiloxane), etc., especially improving the familiarity with makeup cosmetics, In order to enhance the cleansing effect, a trimer of isobutene is preferable, and a commercially available product is Pearl Ream 3 (trade name: manufactured by NOF Corporation).

  Oils that are liquid at 25 ° C can be used alone or in combination of two or more. Oils that are liquid at 25 ° C can be used by selecting one or more types from non-volatile oils and one or more types from volatile oils. Preferably 45 to 65% by mass, particularly 50 to 60% by mass, based on the total amount of the composition (cleansing cream). When the amount is less than 45% by mass, the cleansing effect is low, and when it exceeds 65% by mass, there is stickiness during washing. When the non-volatile oil and the volatile oil are used in combination, the mass ratio of the non-volatile oil to the volatile oil is preferably (non-volatile oil) / (volatile oil) = 3/2 to 10/1. / 1 to 5/1 is particularly preferable.

[(D) monohydric alcohol which is solid at 25 ° C. and has 12 to 22 carbon atoms]
The monohydric alcohol having 12 to 22 carbon atoms and solid at 25 ° C. used in the present invention is a monohydric alcohol having no branching or unsaturated bond, specifically, lauryl alcohol, Examples include myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, and the like, and palmitic acid alcohol and stearyl alcohol are particularly preferable for maintaining stability over time. The monohydric alcohol solid at 25 ° C. can be used alone or in combination of two or more, and is 0.5 to 5% by mass, particularly 1 to 3% by mass, based on the total amount of the composition (cleansing cream). It is preferable to contain. If the amount is less than 0.5% by mass, the stability over time cannot be maintained, and if it exceeds 5% by mass, stickiness is observed during washing.

[(E) Sorbitol]
Sorbitol is a white odorless hexavalent alcohol obtained by reducing glucose and converting an aldehyde group into a hydroxyl group. When preparing the cleansing cream of the present invention, a 70% aqueous solution of sorbitol may be blended.

[(F) Water]
The cleansing cream of the present invention contains water as a component (F) in addition to the components (A) to (E). In order to maintain stability over time, it is necessary to add a certain amount or more of water. However, when the amount is too large, phase inversion is slowed and the familiarity with makeup cosmetics is deteriorated.

  The blending amount of (F) greatly affects the stability over time, but when the blending amount of (F) is small, the stability over time can be maintained by blending (E). That is, in order to maintain stability over time, the total amount of (E) and (F) needs to be a certain amount or more.

  The total content of (E) and (F) is 30 to 45% by mass, and particularly preferably 35 to 40% by mass. When the amount is less than 30% by mass, stability over time cannot be maintained, and when it exceeds 45% by mass, the familiarity with the makeup cosmetics is deteriorated.

  The mass ratio of (E) to (F) is (E) / (F) = 2/3 to 2/1, and particularly preferably 1/1 to 3/2. If it is smaller than 2/3, it becomes sticky at the time of washing, and if it is larger than 2/1, stability over time cannot be maintained.

  The cleansing cream of the present invention can contain an anionic surfactant in addition to the above active ingredients. By blending an anionic surfactant, familiarity with makeup cosmetics and stability over time can be improved. As the anionic surfactant used in the present invention, an anionic surfactant having a linear alkyl group having 14 to 18 carbon atoms or an acyl group is preferable. Specific examples include Na cetyl sulfate, coconut oil fatty acid methyl taurine Na, stearoyl glutamate Na and the like, preferably cetyl sulfate Na and stearoyl glutamate Na. It is preferable to contain 0.1-1 mass% of an anionic surfactant with respect to the composition (cleansing cream) whole quantity.

  Moreover, the general component used for cosmetics can be added as an additional component according to the objective. In order not to impair the effect and efficacy of the present invention, the additive component should be 10% by mass or less based on the total amount of the composition (cleansing cream).

  When preparing the cleansing cream of the present invention, for example, a mixture of (A), (B), (C), and (D) and a mixture of (E) and (F) are heated and mixed at 80 ° C. After mixing, both premixes are mixed. This can be stirred and cooled to near room temperature to obtain an emulsified composition (O / W emulsion).

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

[Examples 1 to 10]
Cleansing creams of Examples 1 to 10 in which each component was blended in parts by mass shown in Table 1 were prepared by the following method. Moreover, it evaluated by the following evaluation method about each cleansing cream. The results are shown in Table 1.

<Preparation>
A mixture of (A), (B), (C), and (D) (oil phase) and a mixture of (E) and (F) (aqueous phase) were heated and mixed at 80 ° C. to make uniform, While stirring, the water phase was added to the oil phase little by little, and after addition of the entire amount, the mixture was stirred using a homomixer. This was stirred and cooled to around room temperature to obtain an emulsified composition. Pearl Ream EX (trade name: NOF Corporation) was used as the hydrogenated polyisobutene. Pearl Ream 3 (trade name: manufactured by NOF Corporation) was used as the isobutene trimer.
<Evaluation method>
(1) Stability The state after storage at rest at 45 ° C. for 1 month was confirmed, and the stability was determined as follows.
○: No separation was observed.
X: Separation was observed.

(2) Evaluation of familiarity with makeup cosmetics 20 women who applied makeup were panelists, and the familiarity with makeup cosmetics when using a cleansing cream was determined as follows.
2 points: If you feel that you are comfortable with makeup cosmetics.
1 point: When it seems that it takes some time to get used to makeup cosmetics.
0 point: When it seems that it is clearly late to adjust to makeup cosmetics.
The total score of 20 people was calculated and evaluated according to the following criteria and displayed in Table 1.
A: There are no panelists who have a total score of 35 or more and an evaluation of 0 points.
○: One or two panelists rated 30 points or more and less than 35 points, or evaluated a total score of 35 points or more and 0 points.
Δ: The total score is 20 points or more and less than 30 points.
X: The total score is less than 20 points.

(3) Evaluation of cleansing effect 20 women who made up makeup were used as panelists, and the removal of dirt when using a cleansing cream was determined as follows.
2 points: When you feel that the makeup has been removed sufficiently.
1 point: If the makeup feels slightly dirty.
0 points: When the makeup stains are clearly felt to be bad.
The total score of 20 people was calculated and evaluated according to the following criteria and displayed in Table 1.
A: There is no panel with a total score of 35 or more and an evaluation of 0.
◯: There is no panel with a total score of 30 or more and less than 35 and 0 points.
(Triangle | delta): There is a panelist who evaluated 20 points or more and less than 30 points, or a total score of 30 points or more and 0 points.
X: The total score is less than 20 points.

(4) Evaluation of non-stickiness Twenty women who applied makeup were panelists, and the stickiness after using cleansing cream was determined as follows.
2 points: When there is no stickiness after use.
1 point: When it feels somewhat sticky after use.
0 points: When it is clearly sticky after use.
The total score of 20 people was calculated and evaluated according to the following criteria and displayed in Table 1.
A: There are no panelists who have a total score of 35 or more and an evaluation of 0 points.
○: One or two panelists rated 30 points or more and less than 35 points, or evaluated a total score of 35 points or more and 0 points.
Δ: The total score is 20 points or more and less than 30 points.
X: The total score is less than 20 points.

(5) Evaluation of the number of massages required until phase inversion When 20 women who had made makeup were panelists and cleansing cream was used, the average number of massages required until phase inversion was calculated.

(6) Evaluation of emulsified particle size at the time of rinsing For 20 women who made up makeup, the emulsified particle size at the time of rinsing with water using a cleansing cream was confirmed with a microscope, and the average emulsified particle size was calculated. .

[Comparative Examples 1 to 10]
Cleansing creams of Comparative Examples 1 to 10 in which each component was blended in parts by mass shown in Table 2 were prepared. Moreover, about each cleansing cream, it evaluated by the said evaluation method similar to Examples 1-10. The results are shown in Table 2.

As is clear from Table 1, the cleansing creams of the present invention of Examples 1 to 10 were excellent in cleansing effects, were familiar with makeup cosmetics, had no stickiness, and had good stability.
The cleansing cream of Comparative Example 1 has a little stickiness due to the large amount of component (A), and the cleansing cream of Comparative Example 2 has poor stability because of the large amount of component (B). . Since the cleansing cream of Comparative Example 3 contains solid oil at 25 ° C. instead of the (C) component, there is stickiness, and the cleansing cream of Comparative Example 4 has a small amount of (C) component. Therefore, the cleansing effect is insufficient and the total blending amount of the component (E) and the component (F) is large, so that the familiarity with the makeup cosmetics is poor. The cleansing cream of Comparative Example 5 was sticky because the amount of component (C) was large, and the cleansing cream of Comparative Example 6 was sticky because of the amount of component (D). Since the cleansing cream of Comparative Example 7 does not contain the component (D), the stability is poor, and the cleansing cream of Comparative Example 8 has a small total amount of the (E) component and the (F) component. The stability was poor. Since the cleansing cream of Comparative Example 9 has a small (E) / (F) value, there is a little stickiness, and the cleansing cream of Comparative Example 10 has a large total amount of the (E) component and the (F) component. Familiarity with makeup cosmetics was poor.

  According to the present invention, there is provided a cleansing cream that is well-familiar with makeup cosmetics such as mascara, lipstick, and foundation applied to the skin, effectively removes the makeup cosmetics, and can be washed away without stickiness. can do.

Claims (1)

(A) 1-4 mass% of glycerin monofatty acid ester,
(B) 2-8 mass% of polyoxyethylene addition type nonionic surfactant of HLB11 or more,
(C) 45 to 65% by mass of liquid oil at 25 ° C.
(D) 0.5 to 5% by mass of a monohydric alcohol having a carbon number of 12 to 22 that is solid at 25 ° C.
(E) sorbitol, and (F) water
The total content of components (E) and (F) is 30 to 45% by mass, and the mass ratio of components (E) and (F) is (E) / (F) = 2/3 to 2/1. Cleansing cream.