Cosmetic brush cleaner

Abstract

[Problem] To provide a cosmetic brush cleaner excellent in quick dryability and capable of removing stains such as deposited cosmetics with ease in the following manner: impregnating tissue paper, towel, or the like with the cleaner to wipe off the cosmetics, sebum, and the like deposited on a cosmetic brush; or directly spraying the cleaner on a cosmetic brush, and wiping the brush with dry tissue paper or the like. [Solution] A cosmetic brush cleaner including: (A) a lower alcohol in an amount of 30 to 99 mass %; (B) a volatile oil in an amount of 1 to 70 mass %; and (C) water in an amount of 7 mass % or less (including 0 mass %).

Claims

1. A cosmetic brush cleaner, comprising: (A) a lower alcohol in an amount of 30 to 99 mass %; (B) a volatile oil in an amount of 1 to 70 mass %, the volatile oil (B) being one or two or more selected from the group consisting of isododecane, hydrogenated polyisobutene, cyclopentasiloxane, and dimethicone; and (C) water in an amount of 7 mass % or less (including 0 mass %).

2. The cosmetic brush cleaner according to claim 1, wherein the lower alcohol (A) is ethanol or isopropyl alcohol.

3. A cosmetic brush cleaning product comprising the cosmetic brush cleaner according to any of claims 1 to 2, wherein the cleaner is accommodated in a dispenser container.

Description

DESCRIPTION OF EMBODIMENTS

(1) A cosmetic brush cleaner of the present invention includes: (A) a lower alcohol in an amount of 30 to 99 mass %; (B) a volatile oil in an amount of 1 to 70 mass %; and (C) water in an amount of 7 mass % or less (including 0 mass %).

(2) (A) Lower Alcohol

(3) The lower alcohols for use in the present invention have no particular restriction so long as they are commonly used for cosmetics, and one or two or more thereof can be used.

(4) As the lower alcohols, C2 to C10 straight chain or branched, saturated or unsaturated, monohydric or polyhydric aliphatic alcohols can be used. For example, mention may be made of ethanol, isopropyl alcohol, 1,2-propylene glycol, dipropylene glycol, 1,3-butyrene glycol, 1,2-pentanediol, hexylene glycol, glycerin, sorbitol, 1,2,3-butanetriol, 1,2,3-pentanetriol, and 1,2,3,4-pentanetetrol, and isomers thereof. Among these, ethanol and isopropyl alcohol are particularly preferable because of excellence in the drying speed after cleaning the cosmetic brush, and the effect of reducing the offensive smell of the brush.

(5) The mixing amount of lower alcohol is set at 30 mass % or more. The reason for this is as follows: when the content of lower alcohol is too small, the volatile oil to be mixed is not dissolved, and is separated into two layers; as a result, the stains such as the cosmetics and sebum deposited on a cosmetic brush may not be sufficiently removed.

(6) (B) Volatile Oil

(7) As the volatile oil for use in the present invention, mention may be made of low-boiling-point hydrocarbon oil, silicone oil, or the like with a boiling point under ordinary pressure within the range of 60 C. to 260 C.

(8) As the volatile hydrocarbon oil, either of straight chain or branched one may be used. As such volatile hydrocarbon oils, mention may be made of isodecane, isododecane, isohexadecane, hydrogenated polyisobutene (soft liquid isoparaffin), and the like.

(9) As the volatile silicone oils, for example, mention may be made of chain polysiloxanes such as dimethylpolysiloxane (Dimethicone), methylphenylpolysiloxane, and methyl hydrogen polysiloxane, and cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetramethyltetrahydrogen cyclotetrasiloxane. Further, as the product examples thereof, for example, there are KF96L-0.65, KF96L-1, KF96L-1.5, and KF995 manufactured by Shin-Etsu Chemical Co., Ltd., SH200-1cs, SH200-1.5cs, and SH200-2cs manufactured by Dow Corning Toray Silicone Co., Ltd., and TSF404, TSF405, and TSF4045 manufactured by Toshiba Silicones Ltd.

(10) (C) Water

(11) The cosmetic brush cleaner of the present invention can contain water in an amount of 7 mass % or less (including 0 mass %). As a result, it becomes possible to appropriately add a sequestrant, a stabilizer, an antiseptic, a UV absorber, an antioxidant, and aqueous components such as aqueous agents. When the content of water is too large, the volatile oil is separated, which may make difficult uniform application to a cosmetic brush.

(12) The cosmetic brush cleaner of the present invention can be kept in a uniform state without separation of a volatile oil while keeping the quick dryability when the amount of water is 7 mass % or less based on the total amount even if water is mixed therein. As a result, even when water penetrates from the junction part of a container accommodating the cosmetic brush cleaner therein, or moisture passes through the resin forming the container, and is mixed therein, the volatile oil will not be separated, and the quality of the cosmetic brush cleaner can be held with stability for a long period. This enables continuation of repeated use at the lavatory rest room or the bathroom.

(13) When the cosmetic brush cleaner is accommodated in a dispenser container, a prescribed amount of the cosmetic brush cleaner can be applied to a cosmetic brush without staining hands. This enables still easier removal of the stains such as the deposited cosmetics. As the dispenser containers, those of a type of spraying the contents in a mist form, those of a type of discharging the contents still in a liquid form, and the like can be appropriately selected and adopted.

EXAMPLES

(14) Below, the present invention will be described in more details by taking concrete examples, which are construed as not limiting the technical range of the present invention at all. Incidentally, the content in the following examples, and the like is by mass % unless otherwise specified.

(15) Each cosmetic brush cleaner obtained by the formulations shown in Tables 1 and 2 was evaluated. For evaluation, the state immediately after manufacturing, the functionalities regarding the cleaning effect, the quick dryability, and being free from stickiness upon wiping off each cosmetic brush after application of foundation by tissue paper impregnated with each cosmetic brush cleaner, and further the long-term stability (the state after an elapse of three weeks) under humidified conditions (98% RH) at 37 C. were evaluated.

(16) The evaluation criteria are as follows.

(17) <Evaluation Criteria>

(18) a: very excellent (pass), b: excellent (pass), c: a little excellent (pass), d: a little inferior (fail), e: inferior (fail)

(19) TABLE-US-00001 TABLE 1 Ex. Component Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 Ex. 8 Ex. 9 10 (A) Lower Ethanol 99 97 95 90 90 30 86 85 83 alcohol Isopropyl alcohol 90 (B) Volatile Isododecane 1 3 5 10 10 70 9 5 oil Isohexadecane 10 Hydrogenated 5 polyisobutene Cyclopentasiloxane 5 Dimethicone (silicone 5 KF-96L-1.5CS) Dimethicone (silicone KF-96A-6CS) Dimethicone (silicone KF-96-100CS) (C) Water Water 0 0 0 0 0 0 0 5 5 7 Total 100 100 100 100 100 100 100 100 100 100 Immediately after Evaluation State a a a a a a a a a a Results Functionality evaluation Cleaning effect c c a a a a a a a a Quick dryability a a a a a a a b b c Being free from stickiness a a a a a a a a a a Long-term stability (humidity simulation test) Contents stability a a a a a a a a a a Notes: Silicone KF96L-1.5CS, Silicone KF96A-6CS, and silicone KF-96-100CS are all the trade names of the silicone oils manufactured by Shin-Etsu Chemical Co., Ltd.

(20) Examples 3 to 7 could get evaluation of a: very excellent (pass) in all the evaluation items as shown in Table 1. Examples 1 and 2 show the results of c: a little excellent (pass) in the functionality evaluation regarding the cleaning effect, but a: very excellent (pass) in other evaluation items. Examples 8 to 10 show the results of b: excellent (pass) or c: a little excellent (pass) in the functionality evaluation regarding the quick dryability, but a: very excellent (pass) in other evaluation items.

(21) From the description up to this point, the cosmetic brush cleaner is required to include (A) a lower alcohol in an amount of 30 to 99 mass %, (B) a volatile oil in an amount of 1 to 70 mass %, and (C) water in an amount of 7 mass % or less (including 0 mass %) in order to exhibit the functions as the cosmetic brush cleaner. In order to obtain a still more excellent cleaning effect, preferably, the content of the lower alcohol (A) is set at 30 to 95 mass %, and the content of the volatile oil (B) is set at 5 to 70 mass %. Further, in order to obtain a still more excellent quick dryability, preferably, the content of water (C) is set at less than 5 mass % (including 0 mass %).

(22) Further, each cosmetic brush cleaner shown in Examples 1 to 10 does not require mixing of a surfactant therein. This can prevent the surfactant from being left in the bristle tufts of the cosmetic brush, which can eliminate the occurrence of stickiness of the bristle tufts.

(23) TABLE-US-00002 TABLE 2 Comp. Comp. Comp. Comp. Component Ex. 1 Ex. 2 Ex. 3 Ex. 4 Comp. Ex. 5 Comp. Ex. 6 (A) Ethanol 81.5 99.9 20 90 90 78 Lower Isopropyl alcohol alcohol (B) Isododecane 5 0.1 80 10 Volatile Isohexadecane oil Hydrogenated polyisobutene Cyclopentasiloxane 5 Dimethicone (silicone KF-96L-1.5CS) Dimethicone (silicone 10 KF-96A-6CS) Dimethicone (silicone 10 KF-96-100CS) (C) Water Water 8.5 12 Total 100 100 100 100 100 100 Immediately after Evaluation State a a a a e (separated) e Results (separated) Functionality evaluation Cleaning effect a d a b Quick dryability d a a d Being free from stickiness a a a d Long-term stability (humidity simulation test) Contents stability a a e a (separated)

(24) As shown in Table 2, for each of Comparative Examples 5 and 6, the oil phase was not dissolved immediately after manufacturing, and the state separated into two layers was observed. Further, for Comparative Example 3, the separation was observed in the long-term stability test under humidified conditions. Still further, for each of Comparative Examples 1, 2, and 4, separation, or the like was not caused, and there was no problem in terms of properties. However, the result was d: a little inferior (fail) in some functionality evaluation regarding cleaning effect, quick dryability, and being free from stickiness.