JPH04103508A - Oil-based clear cosmetic - Google Patents

Abstract

PURPOSE:To provide a clear cosmetic containing nonionic surfactant and a synthetic smectite modified with a cationic surfactant, having excellent usability and temperature stability, exhibiting skin-adhesivity and water-resistance owing to oil-based substrate and giving a durable make-up. CONSTITUTION:The objective oil-based clear cosmetic contains (A) 2-15wt.% of a synthetic smectite modified with a cationic surfactant and (B) 0.1-5 pts.wt. (based on 1 pt.wt. of the component A) of a nonionic surfactant. The component A can be produced e.g. by dissolving a cationic surfactant (e.g. dodecyltrimethylammonium chloride) in ion-exchanged water, adding a synthetic smectite to the solution, filtering the dispersion and drying the filter cake. The component B is preferably a surfactant having an HLB of 2-12, e.g. polyoxyethylene-added oleyl ether. The clear cosmetic is used as make-up cosmetic, hair cosmetic, foundation cosmetic, antisuntan cosmetic, etc.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a novel oil-based transparent cosmetic with excellent stability and ease of use. Basic cosmetics such as creams, emulsions, suntan gels, sunscreen gels, etc., contain synthetic smectite modified with cationic surfactants and nonionic surfactants. This invention relates to an oil-based transparent cosmetic characterized by:

[Conventional technology]

In recent years, transparent cosmetics have been used for reasons such as being gentle on the eyes and skin and giving a refreshing feeling, or water-based cosmetics made by neutralizing water-soluble carboxyvinyl polymer with a basic substance. Most of the cosmetics are made up of base materials, which have the drawback of not being water resistant, making makeup easy to wear off, and making up effects not lasting as long.

In view of the above circumstances, the present inventors have discovered that the present inventors have excellent cosmetic effects, adhesion to the skin, water resistance of the cosmetic film, etc., which have advantages in terms of quality characteristics such as hardness to remove (maintaining the cosmetic effect), and transparency. As a result of extensive research in order to obtain a cosmetic with a high level of oxidation, the inventors discovered that the desired cosmetic could be obtained by blending a specific substance into an oily base, leading to the completion of the present invention.

[Means to solve the problem]

That is, the present invention is an oil-based transparent cosmetic characterized by containing a synthetic smectite modified with a cationic surfactant and a nonionic surfactant.

In addition, the transparent cosmetics referred to in the present invention refer to samples taken in a 0.2 cm thick glass cell using a Hitachi color analyzer, light of 380 to 780 nm transmitted, and the L of a standard white plate placed behind the cell. The value is 30 or more.

The configuration of the present invention will be described below.

The synthetic smectite modified with a cationic surfactant used in the present invention generally contains exchangeable cations interposed between crystal layers of layered silicate minerals belonging to the genus smectite obtained by synthesis of montmorillonite, saponite, hectorite, etc. It is substituted with a cationic surfactant, and is produced by, for example, dissolving the cationic surfactant in ion-exchanged water, adding synthetic smectite to the aqueous solution, dispersing it, and then filtering and drying it.

As a cationic surfactant, for example, the following general formula (1
)(2)(3).

(In the formula, R1 is an alkyl group having 10 to 22 carbon atoms or a benzyl group, R7 is a methyl group or an alkyl group having IO to 22 carbon atoms, R3 and R4 are an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, represents a halogen atom or a methyl sulfate residue, etc.) [R3'' (wherein, , methyl sulfate ion, or a combination thereof, R1 is a hydrocarbon group having 1 to 30 carbon atoms with or without a substituent, R2, Rs, R4
is small (in each case one is a propylene oxide chain (hereinafter PO
chain) and/or ethylene oxide chain (abbreviated as
(hereinafter abbreviated as EO chain), has a hydrocarbon group having 1 to 30 carbon atoms with or without hydrogen or a substituent at the terminal, and the remaining R has the same or different substituents,
or a hydrocarbon group having 1 to 30 carbon atoms. ) Examples of those represented by the general formula (1) include dodecyltrimethylammonium chloride, tetradecyltrimethylammonium chloride, hexadecyltrimethylammonium chloride, octadecyltrimethylammonium chloride, aracyltrimethylammonium chloride, tetradecyldimethylethylammonium chloride, hexadecyldimethylethylammonium chloride,
Octadecyldimethylethylammonium chloride, Arakyldimethylethylammonium chloride, Dioctadecyldimethylammonium chloride, Dioctadecyldimethylammonium chloride, Dioctadecyldimethylammonium chloride, Benzyltetradecyldimethylammonium chloride, Benzylhexadecyldimethylammonium chloride, Benzyloctadecyldimethylammonium chloride , and the corresponding promids, etc.
Further examples include dihexadecylpropylethylammonium methyl sulfate.

Examples of those represented by general formulas (2) and (3) include:
Examples include the following (A), (B), (C), (D), and (E).

Examples of the synthetic smectite used in the present invention include commercially available products such as smectone (manufactured by Kunimine Industries), laponite (manufactured by Laporte), and fluorotetrasilicon mica (manufactured by Topie Industries).

The cationic conversion rate of synthetic smectite is not particularly limited, but if cationic surfactant is added to synthetic smectite at
Preferably, 0 to 110 milliequivalents are used.

The amount of the synthetic smectite modified with a cationic surfactant used in the present invention is preferably 0.5 to 20% by weight, more preferably 2 to 20% by weight based on the total amount of the oil-based transparent cosmetic of the present invention.
It is 15% by weight. If it is less than 0.5% by weight, the storage stability will be poor, and if it exceeds 20% by weight, it will be sticky and have a poor feel when used.

The nonionic surfactant used in the present invention preferably has an HLB value (Note 1) within the range of 1-16, more preferably 2-12. Examples include polyoxyethylene addition (hereinafter abbreviated as POE) oleyl ether, POE stearyl ether, POE lauryl ether, POE alkylphenyl ether, POE behenyl ether, POE
Ether type activators such as OE decyl pentadecyl ether and FOE 2-octyl decyl ether, and ester type activators such as POE hydrogenated castor oil, POE fatty acid monoester, POE fatty acid diester, POE solhitan sushi fatty acid ester, and POE chryceryl. Monoisostearate, POE Chryceryl triisostearate, POE
Ethylene excito addition type surfactants such as chryceryl triisostearate, POE cured castor triisostearate ether ester type active agents, and decacryceryl tetraoleate, hexacryceryl triisostearate, tetracryceryl diiso Polyglycerin fatty acid esters such as stearate and diglyceryl diisostearate, glycerin fatty acid esters such as chryceryl monostearate, chryceryl monoisostearate, and glyceryl limonoleate, and polyhydric alcohol fatty acid ester type surfactants. agent, polyexyalkylene-modified organopolysiloxane, lauroylglutamic acid POE octyl dodecyl ether diester, and the like. Among these, POE (2-10 mol added) oleyl ether, FOE (10-25 mol added) hydrogenated castor oil triisostearate, POE (6-20 mol added) oleic acid diester, POE (3-15 mol added) Particularly preferred are hydrogenated castor oil monoisostearate (addition), lauroyl glutamic acid POE (addition of 2 to 10 moles) octyl dodecyl ether diester, POE-modified organopolysiloxane, and the like. The blending amount of the nonionic surfactant is preferably 0.1 to 5 times the weight of smectite modified with a cationic surfactant, and less than 0.1 times the transparency is insufficient, and more than 5 times the weight. and storage stability deteriorates.

(Note 1) The HLB value of a nonionic surfactant is calculated using the following equation.

Mw HLB= 7 +11.7 log O Mw: Molecular weight of the hydrophilic group of the surfactant M○: Molecular weight of the lipophilic group of the surfactant In the oil-based transparent cosmetic according to the present invention, in order to maintain the cosmetic effect, the oil-based It is necessary to use a base.

The oil used in the present invention can be any oil commonly used in cosmetics, and can be used in a wide range from polar oils to non-polar oils. For example, hydrocarbon oils such as liquid paraffin, squalane, isoparaffin, and branched light paraffins, ester oils such as isopropyl myristate, cetyl isooctanoate, and glyceryl trioctanoate, decamethylpentasiloxane, dimethylpolysiloxane, and methyl Silicone oil such as phenylpolysiloxane, vaseline, microcrystalline wax,
Waxes such as lanolin and lanolin derivatives are included.

The oil-based transparent cosmetic of the present invention may optionally contain an organic silicone resin, a gelling agent such as dextrin fatty acid ester, aluminum stearate, or sucrose fatty acid ester, water,
Lower alcohols such as ethanol and isopropanol, 1
Polyhydric alcohols such as 3-butylene glycol, propylene glycol, dipropylene glycol, chrycerin, and sorbitol, ultraviolet absorbers, preservatives, drugs, fragrances, pigments, anionic surfactants, and the like can also be blended.

Of course, these must be used under qualitative and quantitative conditions that do not impair the purpose of the present invention. [Examples] Next, the present invention will be explained in more detail with reference to Examples. The present invention is not limited thereby. The blending amount is in weight%. Prior to examples, effects, test methods, and evaluation methods will be described.

Transparency Each sample was placed in a glass cell with a thickness of 0.2 cm, and a Hitachi color analyzer was used to transmit light of 380 to 780 nm, and the threshold value of a standard white plate placed behind the cell was measured.

Makeup durability testers actually applied the cosmetics, exercised for 2 hours, and then conducted a sensory evaluation of the durability of the makeup effect.

◎, the makeup effect lasted ○, the makeup effect lasted a little △; the makeup effect hardly lasted ×: the makeup effect did not last at all Usability (lightness) The tester actually applied the cosmetic and used it. A sensory evaluation was conducted regarding the lightness of time.

◎ Very good ◎ Good △, Slightly poor ×, Poor Storage stability The cosmetics were left at 0°C, room temperature, and 500C, and separation after - months was evaluated.

◎: Very good ○: Good △: Slightly poor ×: Poor Example 1 Cosmetics for cleaning ■Isoparaffin 71・■Organic silicone resin 2゜■Dimethyl distearyl ammonium chloride modified synthetic sulftite 6 (Product name of synthetic smectite: Smectite SA: manufactured by Kunimine Kogyo Co., Ltd.) $POE (5 mol) lauryl ether (trade name: Emmalex 7o5゜ manufactured by Nippon Emaruyon KK Co., Ltd.) 3 (Modification method of synthetic smectite) Synthetic smectite was cationically modified by the following method.

(1) 50 g of synthetic smectite was dispersed in 2000 g of ion-exchanged water at room temperature (Homomixer 6°00r
pm, 10 minutes).

(2) 32.52 g of a cationic surfactant was dissolved in 400 g of ion-exchanged water by heating at 80 to 90°C.

(3) +1+ was mixed with (2), dispersed at 60 to 70°C, and cation exchanged (Homo mixer 6000 rpm)
.

10 minutes).

(41 (31) was filtered and the solid was washed twice with ion-exchanged water.

(51+4+ was dried in Nigu to obtain a synthetic smectite modified with a cationic surfactant.

(Manufacturing method) ① to ③ were dissolved and mixed, and the mixture was uniformly stirred in a homodisper to obtain a cosmetic for mixing.

Comparative Example 1 Cosmetics for curling hair ■Carboxyvinyl polymer (product name: Carhopol 94I) ■2-Amino-2-methylpropanol ■Dextrin 0.5 0.3 (product name: soluble starch #I6) 6.0■ Sodium hexametaphosphate 0.05■Purified water
86.05■1,3-butylene glycol 2,0■Ethanol
5.0■ Methylparaben
0.1 (Production method) ① to ③ were dissolved and mixed, and the mixture was uniformly stirred in a homodisper to obtain an occasional cosmetic.

The results of evaluating Example 1 and Comparative Example 1 using the above method are shown in the table below.
Shown in 1.

As is clear from Table 1, the emetic cosmetic of Example 1 was confirmed to have excellent transparency and a long-lasting cosmetic effect.

Table ■ Real-1 Ratio-1 Transparency (L value) Usability (lightness) ◎・ ◎ Makeup durability ◎ , × Storage stability ◎ C Examples 2 to 4 Comparative examples 2.3 Cosmetics for washing Cosmetics for washing were produced according to the formulations shown in Table 1, and each was evaluated.

(Modification method of synthetic smectite) The synthetic smectite used in each example and comparative example was cationically modified by the following method.

(1) Synthetic smectite 50 in 2000g of ion-exchanged water
g was dispersed at room temperature (Homo mixer 6000 rpm
, 10 minutes).

(2) 27.87 g of a cationic surfactant was dissolved in 400 g of ion-exchanged water by heating at 80 to 90°C.

(31 (1) and (2) were mixed, dispersed at 60 to 70°C, and cation exchanged (Homomixer 6000 rpm).

10 minutes).

(4) (3) was filtered, and the solid was washed twice with ion-exchanged water.

(5) f4) was kneaded and dried to obtain a synthetic smectite modified with a cationic surfactant.

(Manufacturing method) ① to ③ were dissolved and mixed, and stirred uniformly in a homodisper to obtain an occasional cosmetic.

As is clear from Table 2, it was confirmed that the occasion cosmetics of Examples 2 to 4 were excellent in transparency, had a light feel on use, and had good storage stability.

Table 2 Examples 5 to 8 Comparative Examples 4 to 6 Hair Cosmetics Hair cosmetics were produced according to the formulations shown in Table 3, and each was evaluated.

(Modification method of synthetic smectite) The synthetic smectite used in each example and comparative example was cationically modified by the same method as that used in Example I.

(Manufacturing method) ① to ② were heated and dissolved and mixed, to which separately dissolved ① to ② was added, stirred uniformly in a homodisper, and then cooled to obtain a hair cosmetic.

As is clear from Table 3, it was confirmed that the hair cosmetics of Examples 5 to 8 were excellent in transparency, had a light feeling on use, and had good storage stability.

Example 9 Sun Kungel was manufactured and evaluated according to the formulation shown in Santangel Table-4.

(Modification method of synthetic smectite) Synthetic smectite was cationically modified by the following method.

(1) 50 g of synthetic smectite was dispersed in 2000 g of ion-exchanged water at room temperature (Homomixer 6000r
pm, 10 minutes).

(2) 30.97 g of cationic surfactant was heated and dissolved in 400 g of ion-exchanged water at 80 to 90°C +3)
(2) was mixed with (1), dispersed at 60 to 70°C, and cation exchanged (Homo mixer 6000 rpm,
10 minutes).

(4) (3' was filtered and the solid was washed twice with ion-exchanged water.

(5) Redisperse (4) in 2500g of ion-exchanged water at room temperature, with an inlet temperature of 250℃ and an outlet temperature of 1000℃.
It was dried using a spray dryer set to C to obtain a synthetic smectite modified with a cationic surfactant.

(Manufacturing method) ① to ③ were dissolved and mixed by heating, and to this, separately dissolved ③ to [phase] was added, stirred in a homodisper, and then cooled to obtain Santankel.

As is clear from Table 4, it was confirmed that the Santan gel of Example 9 was excellent in transparency, had a light feel during use, and had good storage stability.

(The following is a blank space) [Effects of the Invention] The oil-based transparent cosmetic of the present invention has a transparent feel even when placed in a container, and has a refreshing appearance. In addition, it has good quality characteristics such as ease of use and temperature stability, and since it is an oily base, it has strong adhesion to the skin and is water resistant, so it has the effect of preventing makeup from coming off and providing a long-lasting makeup effect.

Patent applicant: Shiseido Co., Ltd.

Claims (1)

[Claims] (1) An oil-based transparent cosmetic comprising synthetic smectite modified with a cationic surfactant and a nonionic surfactant.