JPS63230617A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic having smoothness to the skin, fruitful feeling in use and durable moisture retaining effects of dry touch, using both a cholestanol derivative and carboxymethyl chitin. CONSTITUTION:Any such as facial cosmetic or hair cosmetic is blended with (A) 0.001-20wt.%, especially 0.005-1.0wt.% based on sum of the cosmetic of one or more cholestanol derivative shown by the formula (R is 8-22C straight-chain or branched chain or saturated or unsaturated higher fatty acid residue of polyhydroxyalkyl chain) and (B) 0.001-5wt.%, especially 0.005-1wt. carboxymethyl chitin in the weight ratio of the component A/B=50/1-1/50 to give a cosmetic having refreshing and durable water retaining effects free from greasiness in application without damaging excellent characteristic adaptability and fitting feeling.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is characterized by containing one or more cholestanol derivatives and carboxymethyl chitin, and has a smooth and rich feel when used. To provide a cosmetic that has good affinity with the skin, has a smooth feel, and has a lasting moisturizing effect.

[Conventional technology]

BACKGROUND ART Conventionally, in cosmetics, a technique is known in which a cholestanol derivative is blended as an oil component that has a clean and rich feel, is well blended into the skin, and has a long-lasting moisturizing effect. For example, JP-A-59-225105, JP-A-59-225105, JP-A-59-225105,
60-87205 etc. However, it is not possible to expect a long-lasting moisturizing effect from oil alone in cosmetics, and in order to maintain the moisturizing effect, various moisturizers, mainly water-soluble polysaccharides and polyhydric alcohols, are blended in large amounts to maintain moisture. When I tried to emphasize it, it became sticky when applied and did not blend well into the skin.

[Problems to be solved by the invention]

In view of these circumstances, the present inventors have improved the shortcomings of the above technology, and have created a moisturizing agent that has a moist, smooth and rich feel, is not sticky when applied, blends well into the skin, and has a silky feel. As a result of extensive research in order to obtain cosmetics with long-lasting effects, we have developed a cosmetic that contains cholestanol derivatives as an oil component in combination with carboxymethyl chitin as a moisturizer, thereby achieving the unique familiarity of cholestanol derivatives. The present inventors have discovered that it is possible to obtain a cosmetic that is not sticky when applied, has a smooth moisturizing effect, and has a lasting moisturizing effect without impairing the smoothness and fit of the skin, leading to the completion of the present invention.

[Means for solving problems]

That is, the present invention provides one or two cholestanol derivatives.
The cosmetic is characterized by containing at least one species, carboxymethyl chitin.

Next, the configuration of the present invention will be described.

The cholestanol derivative used in the present invention is an ester of cholesterin and higher fatty acid, and the general formula is as follows, where R is C8-
Straight or branched C22 chain, or saturated or unsaturated higher fatty acid residue of polyhydroxyalkyl chain.

The amount of cholestanol derivatives is 0.0 in the total amount of cosmetics.
01 to 20% is preferred, but o, oos to
It is preferably blended at 1.0%, and if necessary, one type or a combination of two or more types may be blended.Furthermore, in the present invention, it is blended in combination with a cholestanol derivative. Carboxymethyl chitin is made water-soluble by carboxymethylating the 6-position hydroxyl group of chitin.

The method for producing carboxymethyl chitin was published in Japanese Patent Publication No. 5
As described in No. 9-106409, commercially available chitin is pulverized using a pulverizer, immersed in a 42% caustic soda solution, left under reduced pressure for about 8 hours, and then left at room temperature under normal pressure for two days and nights. Then, while cooling to below 0℃ using a cryogen, add thin ice while stirring slowly.
Add M monochloroacetic acid soda little by little, continue stirring at room temperature overnight, and after the reaction is complete, dialyze in running water for 3 days or more using a cellophane membrane. If this dialysis time is increased,
This is more preferred since low amounts of impurities are removed. After completion of the dialysis, the precipitated insoluble matter is removed by filtration, and the filtrate is concentrated under reduced pressure and then freeze-dried to obtain carboxymethyl chitin in the form of a white powder.

Note that when actually used in the production of cosmetics, an aqueous solution of carboxymethyl chitin before concentration under reduced pressure may be blended.

The amount of carboxymethyl chitin to be incorporated into cosmetics is preferably 0.001 to 5% by weight based on the total amount of the cosmetics.
The blending ratio of the cholestanol derivative and carboxymethyl chitin is particularly preferably oos to 1ffi% by weight.
The ratio is preferably 5071 to 1150.

In addition to the above-mentioned essential ingredients, the cosmetic of the present invention may optionally include powder, pigment, oil, etc. depending on the type of cosmetic.
Humectants, surfactants, antioxidants, thickeners, organic solvents,
Components commonly used in cosmetics, such as plasticizers, IUJ preservatives, amino acids, and fragrances, can be appropriately incorporated within the range that does not impair the effects of the present invention.

The dosage form of the cosmetic of the present invention is arbitrary, and any dosage form may be used, such as a solution type, solubilized type, emulsion type, powder dispersion type, water-oil two-layer type, water-oil and powder three-layer type. do not have.

The cosmetics of the present invention can also be used as desired, including facial cosmetics, hair tonics, hair creams, shampoos, hair rinses, foundations, lipsticks, eye shadows, etc. It can be used in make-up cosmetics, body cosmetics, cleaning products such as cleansing foams, aromatic cosmetics, etc.

〔Effect of the invention〕

The cosmetic of the present invention provides a cosmetic that has a smooth and rich feel on the skin, and that blends well into the skin and maintains a moisturizing effect with a dry feel.

(Example) Next, the effect of a combination of a cholestanol derivative and carboxymethyl chitin will be explained in more detail by giving Examples and Comparative Examples.The effect was measured by the following evaluation method.

Evaluation of usability〉 Samples prepared by 10 expert panelists were actually used,
A blind test was performed. Evaluation items were smoothness, spread on the skin,
The seven items are richness, blending into the skin, moisturizing feeling, non-stickiness, and maintaining skin moistness 2 hours after application.

The evaluation results are shown as follows: ◎; 8 out of 10 respondents answered that the evaluation was good.

○: 62 or more out of 10 people answered that it was good.

Δ: 4 out of 10 respondents answered 4 or more.

×: 10 people and less than 2 people answered that it was good.

(Margin below) (Manufacturing method) 1. Stir and dissolve ① to ② at room temperature.

2. Heat and dissolve [phase] at about 50°C and add to (2) and stir and dissolve.

3.2. 1. A lotion was obtained by stirring and mixing.

(hereinafter <τ) Test Example 2 Cream (manufacturing method) Heat and melt ① to ② and ②, [phase] at 80°C. On the other hand, heat and melt ■ to ■ at 70°C, and prepare the aforementioned ■ to ■ and ■, [
After stirring, the emulsified particles were made uniform with a homomixer and cooled to 30° C. with a cooler to obtain cream.

(Test evaluation method) Moisture retention: 40g of sample was put on glass I! (Diameter 4.3cm, height 3.5co+) packed at 37℃ and humidity 50% when opened.
Store in a constant temperature bath for one month. The amount of water loss was determined from the change in weight after storage, and was used as an index of moisture retention. The lower the value, the higher the moisture retention.

Example 9 Foundation (wt%) A Setanol 3.5 Cholesteryl Isostearate 4 Jojoba Oil
5 Vaseline
2 Squalane 6
Glycerin fatty acid ester 2.5P, O,
E (60) Hydrogenated castor oil 1.5P, 0
．． E (25) Cetyl ether 1 Propylparaben 0.3 Fragrance
0.2B glycerin
3 propylene glycol
8 Mixed powder 12 Carboxymethyl chitin 0.3 Purified water
to 100 (manufacturing method) The raw materials for the oil phase belonging to A and the raw materials for the aqueous phase belonging to B are heated to 70°C and completely dissolved, then the oil phase is mixed with the water phase and put into an emulsifier. and emulsify it. The emulsion was cooled with a heat exchanger until the final temperature reached 30°C to obtain a foundation.

JulIO Moisture Lotion (wt%) A Setanol 0.1 Vaseline 0.2 Cholesteryl Isostearate 0.5 Cholesteryl Oleate 0.5 Cholesteryl Palmitate 0.5 Squalane 3.0 Isopropyl Myristate 5.0 P, O, [ !
(60) Hydrogenated castor oil 2.0 Glyceryl oleate 1.5 Butyl paraben
0.1 Ezilbaraben
0.2 fragrance
0.1B Glycerin 1.
0 Carboxymethyl chitin 0.5 Carboxy vinyl polymer 0.2 Caustic potash
0.08 purified water
Amount to make the total amount 100 (manufacturing method) Same as Example 9.

Example 11 Emulsified lipstick (% by weight) A Castor oil 25.0 Deodorized lanolin 5.0 Beeswax
12.0 Oleyl alcohol 20.0 Cholesteryl stearate 1.0 Cholesteryl behenate 1.0 Cholesteryl isostearate 2.0 Cholesteryl oleate 15.0 Pigment
Titanium oxide 2.0 red No. 202
No. 0.5204
2.5227 Al Lake 2.5 Orange No. 201 0.2P, 0. E
(20) Hydrogenated castor oil 1. OTween
60 0.25B Carboxymethyl chitin 0.05 Propylene glycol 5.0 Purified water
5.0 (Manufacturing method) Part A is heated and dissolved at 80°C, and part B is heated and dissolved at 70°C, which is added and emulsified, followed by filling and cooling.

Claims (1)

[Claims] A cosmetic comprising one or more cholestanol derivatives and carboxymethyl chitin.