JP2002114636A - Cosmetic for mild cleansing use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a cleansing cosmetic having high stability and excellent cleansing effect. SOLUTION: This cosmetic is obtained by incorporating light liquid isoparaffin in a cleansing cosmetic, preferably a two-layer type cleansing cosmetic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cosmetic suitable for cleansing.

[0002] Cleansing cosmetics are cosmetics used to remove make-up cosmetics, which are usually used to remove make-up cosmetics from physical changes such as rubbing or perspiration so that their appearance remains unchanged. It is designed so that the cosmetic does not fall off due to excessive stress and its effect is not impaired, so when removing it, a special cosmetic that can remove components that can not be removed by ordinary means is required . For this reason, cosmetics for cleansing often contain components having strong characteristics as solvents, for example, volatile components such as volatile isoparaffins having about 9 to 13 carbon atoms. Such volatile components often strongly irritate the skin and mucous membranes, especially the ocular mucosa, and strict control is required in the method of use. For this reason, there are many cases where the solvent properties of volatile isoparaffins contained can not be utilized. Such tendency of light isoparaffin to stimulate the expression was not small when the makeup cosmetic around the eyes was removed.

Attempts have been made to replace such volatile isoparaffins with other volatile solvents. As such volatile solvents, cyclic silicones and low-viscosity silicones have been used, but the cleansing effect extends to light isoparaffins. Instead, it was often necessary to use it in combination with an aqueous face wash.

[0004] On the other hand, light liquid isoparaffin usually has a carbon number of 16 to 24, which is larger than volatile isoparaffin, and is used as an oily component of oil gel products such as lip color. It was not known at all that it was high and had an excellent solvent effect for cleansing. Further, no attempt has been made to incorporate this into cleansing.

[0005]

SUMMARY OF THE INVENTION The present invention has been made under such circumstances, and an object of the present invention is to provide a cleansing cosmetic which is excellent in safety and cleansing effect.

[0006]

SUMMARY OF THE INVENTION In view of such circumstances, the present inventors have made intensive research efforts to find cleansing cosmetics having excellent safety and cleansing effects. As a result, the present inventors have found that they contain light liquid isoparaffin. Such a property was found in a cleansing cosmetic characterized by the following, and the invention was completed. That is, the present invention relates to the following technology. (1) A cleansing cosmetic comprising light liquid isoparaffin. (2) The cleansing cosmetic according to (1), wherein the light liquid isoparaffin is a copolymer of isobutene and normal butene and / or a hydrogenated product thereof. (3) The cleansing cosmetic according to (1) or (2), which is for removing a makeup cosmetic used around the eyes. (4) It is characterized in that it is a two-layer separated dosage form, (1)-
(3) The cleansing cosmetic according to any one of the above. Hereinafter, the present invention will be described in more detail focusing on embodiments.

(1) Light liquid isoparaffin which is an essential component of the cleansing cosmetic composition of the present invention The cosmetic composition of the present invention is characterized by containing light liquid isoparaffin. The light liquid isoparaffin referred to in the present invention is a composition containing only an aliphatic hydrocarbon as a component, does not volatilize at 20 ° C. and 1 atm, and has a low viscosity. An aliphatic hydrocarbon having a branched chain and having 12 to 30 carbon atoms, more preferably 16 to 24 carbon atoms. Such a component can be extracted from crude oil by distillation or the like. And a branched aliphatic hydrocarbon such as isobutene and a linear aliphatic hydrocarbon such as normal butene. Further, such a copolymer may be added with hydrogen after polymerization, if necessary. Of these, particularly preferred is a copolymer of isobutene and normal butene and / or a hydrogenated product thereof. This is because such copolymers have less fluctuation of the constituent components. As such a copolymer of isobutene and butene, there is "Pearl Ream 4" sold by NOF Corporation. As a hydrogenated product of a copolymer of isobutene and butene,
"Pearl Dream E" sold by NOF Corporation
X "and" IP Solvent 2028 "sold by Idemitsu Oil Co., Ltd., and any of them can be preferably used. In the cleansing cosmetic of the present invention,
Such a light liquid isoparaffin dissolves and disperses a powdered fat mixture that constitutes a makeup cosmetic or the like without exhibiting irritation even in a site that is sensitive to chemical irritation, such as the ocular mucosa. Excellent removal effect. In addition, even when used, the oil has no volatile oily components, but has no greasy oiliness and has refreshing desirable characteristics. In the cleansing cosmetic composition of the present invention, such a light liquid isoparaffin can be contained solely in the cleansing cosmetic composition, or in combination of two or more. The preferable content of such light liquid isoparaffin in the cleansing cosmetic of the present invention is 1 to the total amount of the cosmetic in total.
It is 0 to 60% by weight, more preferably 20 to 50% by weight, and even more preferably 25 to 40% by weight. This is because the solvent effect reaches a plateau even if it is too large, and the degree of freedom of the prescription may be impaired in some cases. If the amount is too small, the solvent effect may not be obtained.

(2) Cosmetic for cleansing of the present invention The cosmetic for cleansing of the present invention is characterized by containing the above essential component, light liquid isoparaffin. The cleansing cosmetics referred to in the present invention include oily components such as oil stains, oily components such as makeup cosmetics, powders, and a mixture of oily components and powders, which have oily properties as a whole. In addition, it means a cosmetic used for the purpose of removing things that cannot be removed only by aqueous face washing. The dosage form can be used without any particular limitation as long as it is usually used in cleansing cosmetics. For example, a one-layer or two-layer lotion dosage form, an oil-in-water emulsified dosage form, a water-in-oil type Emulsified dosage form, multiple emulsion dosage form,
Any of oily gel dosage forms, non-aqueous emulsification dosage forms and the like can be preferably exemplified. Of these, particularly preferred is a two-layer lotion dosage form. This is in order to make use of the property of light liquid isoparaffin, which is an essential component of the cleansing cosmetic composition of the present invention, that is "friendly to the area around the eyes". In this dosage form, since a surfactant is not substantially required, it is a more preferable form not to contain a nonionic surfactant which may cause irritation to the eyes. In addition, as a type of the cleansing cosmetic,
In view of the above-mentioned characteristics, eye color, eye liner, and mascara are used to remove makeup cosmetics used around the eyes, which further enhances the properties of the cleansing cosmetics of the present invention. It is particularly preferable because it can be used.
Furthermore, it is also advantageous to use it for removing makeup makeup for summer and the like which is difficult to remove with ordinary cleansing cosmetics because of its excellent oily component removal properties.

[0009] In the cleansing cosmetic of the present invention,
In addition to the light liquid isoparaffin, which is an essential component, any component commonly used in cosmetics, particularly cleansing cosmetics, can be contained. Examples of such optional components include hydrocarbons such as squalane, petrolatum, and microcrystalline wax, silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and cyclic dimethylpolysiloxane, jojoba oil, carnauba wax, and olein. Esters such as octyldodecyl acid, triglycerides such as olive oil, tallow, coconut oil, fatty acids such as stearic acid, oleic acid and ritinoleic acid, higher alcohols such as oleyl alcohol, stearyl alcohol, octyldodecanol, sulfosuccinate esters, and Anionic surfactants such as sodium oxyethylene alkyl sulfate, amphoteric surfactants such as alkyl betaine salts, cationic surfactants such as dialkylammonium salts, sorbitan fatty acid esters, and fats Nonionic surfactants such as monoglycerides, their polyoxyethylene adducts, polyoxyethylene alkyl ethers and polyoxyethylene fatty acid esters, polyethylene glycol, glycerin, 1,3-butanediol, isoprene glycol, 1,2-pentane Preferred examples include polyhydric alcohols such as diols, ethanol, thickening / gelling agents, antioxidants, ultraviolet absorbers, coloring agents, preservatives, and powders. Of these, as described above, it is preferable that the composition does not contain a surfactant, especially a nonionic surfactant. Further, it is preferable to suppress the content of ethanol to 5% by weight or less from the same viewpoint. The cleansing cosmetic of the present invention can be produced by treating these essential components and optional components according to a conventional method.

[0010]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but it goes without saying that the present invention is not limited to only these Examples.

<Examples 1 to 3> Cosmetics for cleansing of the present invention were prepared according to the following formulas. That is, the components (a) and (b) were each heated to 75 ° C., and (a) was gradually added to (b) and emulsified. After homogenizing the particles with a homogenizer, the mixture was stirred and cooled to obtain a cleansing cream. As Comparative Example 1, the oily component was changed to liquid paraffin, and as Comparative Example 2, the oily component was light isoparaffin (carbon number 9).
To 12; volatile oil agent). These were evaluated by the following eye color removal test for summer. That is, 2cm x 3c in the upper arm
m site, apply eye color, 0.3g specimen
The cosmetics were rubbed and wiped off with absorbent cotton, and the remaining condition of the cosmetic was evaluated according to the following criteria. That is, ++: removal without residual only with cleansing agent, +: although there is residual when carefully observed, there is no residual after washing with an aqueous cleaning agent, ±: there is residual,
Slight residual after washing with an aqueous detergent,-: This is a criterion for not being completely removed even when an aqueous detergent is used in combination. In addition, the effect on ocular mucosa was examined using a Hartley white guinea pig. That is, the eyelid was rubbed three times using a cotton swab impregnated with the specimen, and ++: clearly red, +: slightly red, ±: as compared to a case where the eyelid was rubbed 10 minutes later with a cotton swab impregnated with water.
Feeling red,-: Evaluated based on the criteria of unchanged. Table 1 shows the results. This indicates that the cleansing cosmetic composition of the present invention has an excellent function as a cleansing agent and can be used extremely safely in a site sensitive to a chemical substance such as an eyelid. (Prescription of eye color) Colored titanium mica 30 parts by weight Iris foil 20 parts by weight Sericite 20 parts by weight Mica 10 parts by weight Epoxy resin palmitate stearate 3 parts by weight High viscosity dimethicone 2 parts by weight Microcrystalline wax 5 parts by weight Octyl oleate Dodecyl 10 parts by weight (prescription of cleansing cosmetic) i Oily component * 50 parts by weight Diglycerin tetraolate 10 parts by weight Sorbitan sesquistearate 3 parts by weight Polyoxyethylene behenyl ether 2 parts by weight 0.1 parts by weight butyl paraben b 1 , 2-Pentanediol 3 parts by weight Isoprene glycol 3 parts by weight Water 28.9 parts by weight * Details are shown in Table 1.

[0012]

[Table 1]

<Examples 4 and 5> A two-layer lotion type cleansing cosmetic composition of the present invention was prepared according to the following formulation. That is, the prescription components were stirred and processed so that all the components were dissolved in the upper layer or the lower layer. While stirring with mechanical force, the composition was dispensed into bottles to obtain a cleansing cosmetic. Evaluation was performed in the same manner as in Examples 1 to 3. Table 2 shows the results. This shows that the cosmetic for cleansing of the present invention has excellent cleansing power and is gentle on sensitive parts such as eyelids. Oily component ** 30 parts by weight Low viscosity dimethicone 20 parts by weight Benzalkonium chloride (1% aqueous solution) 0.5 part by weight Ethanol 5 parts by weight Water 44.5 parts by weight ** Details are shown in Table 2.

[0014]

[Table 2]

<Examples 7 to 9> A two-layer lotion type cleansing cosmetic composition of the present invention was prepared according to the following formulation. That is, the prescription components were stirred and processed so that all the components were dissolved in the upper layer or the lower layer. While stirring with mechanical force, the composition was dispensed into bottles to obtain a cleansing cosmetic. The cleansing action was evaluated in the same manner as in Examples 1 to 3. Table 3 shows the results. This shows that the cosmetic for cleansing of the present invention has excellent cleansing power and is gentle on sensitive parts such as eyelids. Oily component *** 50 parts by weight Benzalkonium chloride (1% aqueous solution) 0.5 part by weight Ethanol 5 parts by weight Water 44.5 parts by weight *** Details are shown in Table 3.

[0016]

[Table 3]

[0017]

According to the present invention, it is possible to provide a cleansing cosmetic which is excellent in safety and cleansing effect.

Claims (4)

[Claims] 1. A cleansing cosmetic comprising light liquid isoparaffin. 2. The cleansing cosmetic according to claim 1, wherein the light liquid isoparaffin is a copolymer of isobutene and normal butene and / or a hydrogenated product thereof. 3. The cleansing cosmetic according to claim 1, wherein the cosmetic is used for removing makeup cosmetics used around the eyes. 4. A two-phase separated dosage form,
The cleansing cosmetic according to any one of claims 1 to 3.