JP2002114628A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a highly stable cosmetic having high moisturizing effect and slight sticky feeling. SOLUTION: This cosmetic contains a hydrogenated phospholipid with the phosphatidylcholine content of the phospholipid being >=70 wt.% and a polyoxyethylene-polyoxypropylene copolymer liquid at 25 deg.C; particularly, the content of the hydrogenated phospholipid and that of the polyoxyethylene- polyoxypropylene copolymer are characterized by being 1-10 wt.% and 0.1-5 wt.%, respectively, or the molecular weight of the polyoxyethylene- polyoxypropylene copolymer is characterized by being 5,000-50,000. Furthermore, the cosmetic optionally contains mucopolysaccharides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to cosmetics, and more particularly, to the suppression of stickiness after use by containing a high-purity hydrogenated phospholipid and a specific polyoxyethylene polyoxypropylene copolymer. However, it relates to a highly moisturizing cosmetic.

[0002]

2. Description of the Related Art Conventionally, phospholipids are known as emulsifiers of natural origin, and are used for many purposes in many fields. In the cosmetics field, it is used in creams, lotions, foundations, and the like as a naturally-derived emulsifier or gel-forming agent. Above all, it has been reported that a combination of a phospholipid and a specific surfactant has excellent gel-forming ability.
No. 1317 and the like.

[0003] In recent years, in order to prevent atopic dermatitis and xeroderma, cosmetics with low skin irritation and high moisturizing properties have been desired, and various studies have been made. Many products are on the market. However,
When the content of the humectant is increased in order to enhance the moisturizing effect, the cosmetic may feel sticky in some cases, and it has been necessary to devise measures such as reducing stickiness with an oil agent or powder.

[0004] That is, there has been a demand for the development of a cosmetic having a high moisturizing effect and a low stickiness.

[0005]

DISCLOSURE OF THE INVENTION The present invention has a high moisturizing effect and has a usability that does not give a sticky feeling after use.
Another object of the present invention is to provide a cosmetic having good stability.

[0006] In view of such circumstances, the present inventors have conducted intensive studies and as a result, by adding high-purity hydrogenated phospholipid and a specific polyoxyethylene polyoxypropylene copolymer to cosmetics, The inventors have found that the problem is solved and completed the present invention.

That is, the present invention relates to the following components (a) and (b): (a) a hydrogenated phospholipid having a phosphatidylcholine content of 70% by weight or more in a phospholipid; Which is a polyoxyethylene polyoxypropylene copolymer.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The hydrogenated phospholipid of the component (a) used in the present invention comprises:
It is used as an emulsifier or a gel former, and has a phosphatidylcholine (hereinafter abbreviated as PC) purity of
Any material containing 70% by weight or more (hereinafter, weight% is abbreviated as%) of PC may be used. The PC content in this phospholipid is
It contributes to the stability of the interface film, and it is known that if the PC purity is low, the stability is impaired, and precipitation, aggregation, and the like occur. Therefore, from the viewpoint of excellent emulsion stability, the PC purity is preferably 70% or more.

Specific examples of the hydrogenated phospholipid of the component (a) used in the present invention include those obtained by hydrogenating natural lecithin extracted from soybeans, egg yolks and the like according to a conventional method, and phosphatidylcholine, phosphatidylethanol. Examples include hydrogenated amines, phosphatidylinositol, phosphatidylserine, neutral phospholipids, and the like. Natural lecithin is usually a mixture of the above components, and one having a high phosphatidylcholine content can be selected and included in cosmetics.

[0009] The content of the hydrogenated phospholipid of the component (a) used in the present invention is preferably 1 to 10% in the cosmetic.
More preferably, when the content is 3 to 8%, the emulsion stability and the gel forming ability are excellent.

The polyoxyethylene polyoxypropylene copolymer of the component (b) used in the present invention is contained for the purpose of moisturizing the skin and suppressing stickiness after use. Any liquid may be used. In the case of a solid form, the effect of suppressing stickiness after use is excellent, but the moisturizing effect is slightly inferior.

The polyoxyethylene polyoxypropylene copolymer of the component (b) used in the present invention is a polymer compound obtained by polymerizing propylene oxide and adding ethylene oxide to propylene glycol. For example, when the number of moles of polyoxyethylene is less than 20, the number of moles of polyoxypropylene is less than the number of moles of polyoxyethylene. Less than 4 times. When the number of moles of polyoxyethylene is 20 or more, the number of moles of polyoxypropylene is less than 1.5 times the number of moles of polyoxyethylene.

If the component (b) used in the present invention is specifically exemplified, a commercially available product may be Unilube 75.
DE-2620 <Viscous liquid> (manufactured by NOF CORPORATION), PRONON 184 <liquid> (manufactured by NOF Corporation), Adecapluronic L-44 <liquid> (manufactured by Asahi Denka Co., Ltd.), Epan 680 <viscous liquid> (first Industrial Pharmaceutical Company), New Pole PE-6
2 <liquid to viscous liquid> (manufactured by Sanyo Chemical Industries), Pronon 15
4 <Liquid> (manufactured by NOF CORPORATION), ADEKA CARPOL PH-
255 <Viscous liquid> (manufactured by Asahi Denka), Adecapluronic P-84 <Viscous liquid> (manufactured by Asahi Denka), Pronon 33
3 <Viscous liquid> (manufactured by NOF Corporation) and the like. Among them, Unilube 75DE-2620 is preferable because the effects of the present invention can be obtained.

The polyoxyethylene polyoxypropylene copolymer of the component (b) used in the present invention preferably has a molecular weight of 5,000 to 50,000. Within this range, the moisturizing effect can be more easily obtained, and the sticky feeling is effectively suppressed.

The content of the polyoxyethylene polyoxypropylene copolymer of the component (b) used in the present invention is as follows:
0.1 to 5% is preferable, and 0.5 to 3% is more preferable.
It is. Within this range, the moisturizing effect can be more easily obtained, and the sticky feeling is effectively suppressed.

In the present invention, mucopolysaccharides may be contained for the purpose of imparting a further moisturizing effect. Specific examples include hyaluronic acid, chondroitin sulfate, dermatan sulfate, heparan sulfate, heparin, and keratan sulfate, and salts thereof. One or more of these are appropriately selected and used.
Furthermore, the content is 0.001 to 3% of the total amount of the cosmetic.
Is more preferable, and more preferably 0.01 to 1%.

The cosmetic of the present invention exerts its excellent effects only when the specific hydrogenated phospholipid, which is an essential component, and a specific polyoxyethylene polyoxypropylene copolymer are contained in combination. is there. That is, when a highly moisturizing liquid polyoxyethylene polyoxypropylene copolymer is contained in a highly stable gel using a high-purity hydrogenated phospholipid, the feel of the cosmetic becomes sticky. It has been found that cosmetics with less odor can be obtained. This effect is a new excellent effect that cannot be obtained by other combinations.

The cosmetic of the present invention can be obtained by a method for producing ordinary cosmetics, and the method for producing the cosmetic is not particularly limited.

If the dosage form of the cosmetic of the present invention is specifically exemplified, it can be used for emulsions, creams, packs, massages, makeup cosmetics, etc. Surfactants, oils, polymers, powders, water, preservatives, coloring agents, cooling agents, stabilizers, alcohols, drugs, fragrances, and the like can be appropriately added depending on the form of the ingredients.

[0019]

The present invention will be described in more detail with reference to the following examples, which should not be construed as limiting the invention thereto.

Examples 1 to 10 and Comparative Examples 1 to 5: Moisturizing cream (O / W type) A moisturizing cream having the composition shown in Table 1 below was prepared, and (1) gel stability (2) feeling of use (moisturizing feeling) , Non-stickiness) were evaluated by the following methods, and the results are shown in Table 1.

[0021]

[Table 1]

(Production method) A: Components 1 to 11 are heated to 80 ° C. B: Heat components 12-14 to 80C. C: A was added to B and emulsified, cooled to room temperature, and then components 15 to 26 and 27 were sequentially added thereto to obtain a moisturizing cream.

[Evaluation Item (1), Evaluation Method and Judgment Method]: Gel stability The appearance change was observed in a thermostat at 25 ° C., and judgment was made according to the following criteria (A).

(Criterion A) ：: Stable and no change was observed even after 6 months or more Δ: Stable until 1 month, but tended to separate thereafter ×: Gel formation, but 1 Separated in weeks

[Evaluation Item (2), Evaluation Method, and Judgment Method] Using a 10-person expert evaluation panel, the feeling of use (moisturizing feeling, lack of stickiness) when applied to the skin was evaluated according to the following five-grade evaluation. The average score was determined according to (Standard B).

[Evaluation] 5 points: Very good 4 points: Good 3 points: Normal 2 points: Poor 1 point: Very poor (Standard B) A: Average score of 4.5 or more O: Average score of 3.5 Not less than 4.5 but less than 4.5 points: average 2.5 to less than 3.5 points x: less than 2.5 averages

As is clear from the results shown in Table 1, the moisturizing creams of Examples 1 to 10 of the present invention are superior to the moisturizing creams of Comparative Examples 1 to 5 in gel stability and feeling of use. Met.

Example 11 Moisturizing Serum (Gel) A moisturizing serum (gel) was prepared according to the following composition and manufacturing method. (Composition) (Component) (%) (1) Hydrogenated soybean phospholipid 1.0 (PC purity = 70%) (2) Cholesterol 0.5 (3) 1,3-butylene glycol 15.0 (4) ) Methyl paraoxybenzoate 0.2 (5) Alkyl-modified carboxyvinyl polymer 0.3 (6) Potassium hydroxide proper amount (7) Remaining purified water (8) Xanthan gum 0.1 (9) Polyoxyethylene 2.0 poly Oxypropylene copolymer (molecular weight 15000, liquid at normal temperature) (10) Sodium hyaluronate solution 0.1 (1% aqueous solution) (11) Ethanol 5.0

<Manufacturing Method> A: The components (1) to (4) are uniformly mixed while heating to 70 ° C. 2. B: Components (5) to (8) are uniformly mixed and heated to 70 ° C. 3. Add B to A and emulsify. 4.3 was cooled to room temperature, and components (9) to (11) were added to obtain a moisturizing serum.

The moisturizing essence of Example 11 obtained as described above was excellent in gel stability and feeling of use (no moisturizing feeling, no sticky feeling).

Example 12 Moisturizing emulsion A moisturizing emulsion was prepared according to the following composition and method. (Composition) (Component) (%) (1) Liquid paraffin 3.0 (2) Glyceryl trioctanoate 5.0 (3) Cetanol 0.5 (4) Glyceryl monostearate 0.3 (5) Polyoxy Ethylene (40) 1.0 hydrogenated castor oil (6) hydrogenated soybean phospholipid 1.0 (PC purity = 80%) (7) sorbitol 10 (8) polyoxyethylene 2.0 polyoxypropylene copolymer (molecular weight (15000 Room temperature liquid) (9) 1,3-butylene glycol 10 (10) Sodium hyaluronate solution 1.0 (1% aqueous solution) (11) Methyl parahydroxybenzoate 0.15 (12) Carboxyvinyl polymer 0.2 (13) ) Sodium hydroxide 0.1 (14) Purified water balance

<Manufacturing Method> A: The components (1) to (6) are uniformly mixed while heating to 70 ° C. 2. B: Components (7) to (14) are uniformly mixed,
Warm up. 3. Add A to B and emulsify. 4.3 was cooled to room temperature to obtain a moisturizing emulsion.

The moisturizing emulsion of Example 12 obtained as described above was excellent in gel stability and feeling in use (no moisturizing feeling, no sticky feeling).

Example 13 Liquid foundation A liquid foundation was prepared according to the following composition and production method. (Composition) (Component) (%) (1) Liquid lanolin 2.0 (2) Liquid paraffin 5.0 (3) Hydrogenated soybean phospholipid 1.0 (PC purity = 85%) (4) Stearic acid 2.0 (5) Cetanol 1.0 (6) Self-emulsifying monostearic acid 1.0 Glycerin (7) Paramethoxycinnamic acid-2 3.0-ethylhexyl (8) Methyl paraoxybenzoate 0.1 (9 ) Glycerin 5.0 (10) Polyoxyethylene 0.5 Polyoxypropylene copolymer (molecular weight 15000, liquid at normal temperature) (11) Triethanolamine 1.0 (12) Carboxymethylcellulose 0.2 (13) Bentonite 0.5 (14) Remaining amount of purified water (15) Titanium oxide 6.0 (16) Fine titanium oxide 2.0 (17) Fine zinc oxide 5.0 (18) Mica (19) Talc 4.0 (20) Yellow iron oxide 3.0 (21) red iron oxide 0.9 (22) black iron oxide 0.1 (23) Perfume Appropriate amount

<Manufacturing Method> A: Components (1) to (7) are mixed and dissolved. 2. B: Components (15) to (23) are added, mixed uniformly, and kept at 70 ° C. 3. C: Components (8) to (14) are uniformly dissolved, and 70 ° C.
To keep. 4. After B is added to A, it is added to C and emulsified uniformly. 5.4 was cooled to obtain a liquid foundation.

The liquid foundation of Example 13 obtained as described above was excellent in gel stability and feeling in use (no moisturizing feeling, no sticky feeling).

[0037]

According to the present invention, it is possible to obtain a cosmetic having a high moisturizing effect, a less sticky feel and an excellent stability.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AA112 AB032 AB052 AB172 AB212 AB232 AB242 AB442 AC022 AC072 AC102 AC122 AC132 AC182 AC242 AC392 AC432 AC482 AC542 AC842 AC852 AD051 AD092 AD152 AD272 AD311 AD332 AD352 AD492 AD512 AD571 AD572 CC02 CC05 CC12 DD33 DD33 EE01 EE06 EE11

Claims (4)

[Claims] 1. The following components (a) and (b): (a) a hydrogenated phospholipid having a phosphatidylcholine content of 70% by weight or more in a phospholipid; and (b) a polyoxyethylene polyoxypropylene liquid at 25 ° C. Cosmetics characterized by containing a copolymer. 2. The method according to claim 1, wherein the hydrogenated phospholipid of component (a) is 1 to 1.
The cosmetic according to claim 1, wherein 0% by weight and 0.1 to 5% by weight of the polyoxyethylene polyoxypropylene copolymer of the component (b). 3. The polyoxyethylene polyoxypropylene copolymer of component (b) has a molecular weight of 5,000 to 5,000.
3. The cosmetic according to claim 1, wherein the cosmetic is 0. 4. The cosmetic according to claim 1, further comprising a mucopolysaccharide.