WO2000076463A1

WO2000076463A1 - Thermal preparations

Info

Publication number: WO2000076463A1
Application number: PCT/JP2000/003762
Authority: WO
Inventors: Mikio Sakaguchi; Ichiro Sakamoto; Kazuyuki Harima; Hiroshi Ota; Satoshi Tojo
Original assignee: Kao Corporation
Priority date: 1999-06-14
Filing date: 2000-06-09
Publication date: 2000-12-21
Also published as: TWI259773B; JP4452425B2

Abstract

Thermal preparations which contain as the main component calcium aluminate compounds represented by the compositional formula xCaO.yAl2O3 (x/y = 0.5 to 4.0); and non-aqueous cosmetics containing the same.

Description

Akira Heating agent Technical field

The present invention relates to a heat generating agent which generates heat when hydrated upon contact with water, which is incorporated into non-water cosmetics used for body care, face care, hair care, dental care, deodorant, hair removal / hair removal, etc. More specifically, the present invention relates to a heating agent which generates a large amount of heat and has excellent durability, and does not excessively increase the pH during use. Background art

As a warming agent for cosmetics that generates heat by hydration, anhydrous zeolite, calcium oxide and the like are widely known.

Of these, anhydrous zeolite has a high gas absorbency, and the product containing it has the problem of releasing the absorbed gas and expanding the product container depending on the environment in which it is stored. Since anhydrous zeolite has high reactivity with water vapor, it must be heated and degassed before blending it into cosmetics to maintain stable heat generation. As a heating agent for solving these problems, Japanese Patent Publication No. 8-5770 discloses potassium zeolite, but it cannot completely suppress gas absorption. In addition, zeolite has a problem that the hydration rate is very fast, but the heat of hydration is smaller than calcium oxide, and the heat generation is not sustained.

Calcium oxide, on the other hand, has a high calorific value and is excellent in persistence.However, since the calorific temperature rises excessively and shows a high pH, reactivity with other ingredients and irritation to the skin are considered. Is not preferred.

An object of the present invention is to provide a heating agent which generates a large amount of heat, is excellent in sustainability, and does not excessively increase the pH during use. Disclosure of the invention

The present invention, non-aqueous cosmetic containing thermal agent and which mainly containing composition formula _{_{xCaO 'yAl 2 0 3 (x}} / y = 0. 5~4. 0) Calcium Al mineralocorticoid one Bok compound represented by Fees.

The present invention also provides a skin heating method characterized by applying the non-aqueous cosmetic to wet skin or applying the non-aqueous cosmetic to the skin together with water. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a diagram showing the temperature change of the suspension when various powders are put into water and stirred. BEST MODE FOR CARRYING OUT THE INVENTION

X and y calcium formula xCaO 'yAl ₂ 0 ₃ of aluminate to be used in the present invention, from the viewpoint of the sufficient heating value and heat generation of persistence aspect, and pH in use, such is too high odd , X / y = 0. 5 to 4.0, preferably 1.5 to 3.5.

Among such calcium aluminate, X-rays diffraction pattern derived from 12Ca0 · 7Α1 ₂ 0 ₃ identified as ICPDS Νο · 9-413, and JCPDS No. 32-148, 32- 149, 32-150 , 33-251, those of crystalline with either X-ray diffraction pattern derived from 3Ca0 · A1 ₂ 0 ₃ which is identified as such 38-1429 is not preferable from the standpoint of heat value. The specific surface area of calcium aluminate is preferably at least lm ² / g in order to increase the probability of contact with water, the hydration rate, and to achieve rapid heat generation. In addition, the average particle size of potassium aluminate is 50 mm or less, particularly from 0.1 to 1θ, from the viewpoint of dispersibility in water, heat build-up, and feeling of use as a product applied to the human body.範囲 ΐη range Is preferred.

Calcium aluminate one Bok used in the present invention, after the form baked by mixing in a desired ratio such that the composition of the calcium source compound and Aruminiu beam source compound as CaO and A1 ₂ 0 _3, is prepared by grinding be able to. As the calcium source and the aluminum source, any of water-soluble and insoluble materials can be used. For example, the calcium source compound includes calcium carbonate, and the aluminum source compound includes aluminum hydroxide. The firing is preferably performed at 500 to 1600 ° C, particularly 800 to 00 ° C.

As the heating agent of the present invention, the above calcium aluminate is used as it is or from the viewpoint of pH adjustment in water, improvement of dispersibility, etc., other metal oxides, clay minerals, silicates, etc. Granules to which inorganic salts, organic substances, polymers, surfactants, and the like are added may be used.

The heating agent of the present invention can be suitably used as a compounding component of a non-aqueous cosmetic, and its compounding amount is from 1 to 50% by weight in the total composition of the cosmetic as the calcium aluminate in view of a heating effect, When it is used as, it is particularly preferably 2 to 30% by weight. When used as a pack, the content is preferably 20 to 50% by weight.

The non-aqueous cosmetic of the present invention includes, in addition to the heating agent of the present invention, other components usually incorporated in cosmetics, such as a pH adjuster, a surfactant, an oil, a lubricant, a wetting agent, a preservative, and a disinfectant. Agents, antibacterial agents, deodorants, deodorants, deodorants, anti-inflammatory agents, astringents, antiperspirants, hair removers, hair suppressants, hemostatic agents, painkillers, vitamins and their derivatives, chelating agents, viscosity modifiers A filming agent, an adhesive, a foaming agent, a cooling agent, a cooling agent, a metal inhibitor, a plant and animal extract, a pigment, an antioxidant, a fragrance, and the like can be appropriately compounded as long as the effects of the present invention are not hindered. The term “non-water” in the present invention means that water is not substantially mixed, but some water may be mixed as long as heat generated by the mixed heating agent can be caused by contact with water. . The dosage form of the non-aqueous cosmetic of the present invention is not particularly limited, but from the viewpoint of ease of application to the skin and easy stretching of the bow I, a thixotropic gel containing a liquid base. Are preferred.

As such a liquid base, monohydric or polyhydric alcohols which are liquid at room temperature, such as glycerin, propylene glycol, butylene glycol, ethylene glycol monoethyl ether, sorbitol, polyethylene lendalicol, and the like are preferable. The liquid base is preferably contained in the non-water cosmetic in an amount of 1 to 95% by weight, particularly 2 to 80% by weight.

The non-water cosmetic of the present invention may contain a clay mineral such as bentonite or kaolinite in an amount of 5 to 60% by weight of the total composition in order to impart appropriate viscosity or to improve the dispersibility of the heating agent of the present invention. 5-30% by weight, especially natural, synthetic, semi-synthetic, water-soluble polymers such as hydroxypropylcellulose, acrylic acid, methacrylic acid copolymer, guar gum, xanthan gum, pullulan, polyvinylpyrrolidone, and polyvinyl alcohol. 0.01 to 5% by weight, especially 0.05 to 1% by weight, of the compound in the total composition 0.1 to 5% by weight of organic and inorganic powders such as silicone powder, alumina powder, silica powder, and gypsum powder It is preferable to add 20% by weight, particularly 0.1 to 10% by weight.

In addition, the non-water cosmetic of the present invention may optionally contain a pH adjuster for adjusting the pH. The amount of the pH adjuster is 1 to 50% by weight in the total composition of the cosmetic, particularly a cream. 2 to 30% by weight when used as a pack, and 20 to 50% by weight when used as a pack. The ratio of calcium aluminate to calcium aluminate can be arbitrarily selected. Particularly, in the case of cosmetics that require a low pH from the viewpoint of skin irritation, (calcium aluminate): (pH adjuster) = Preferably, the ratio is 50:50 to 20:80. As the pH adjuster, for example, an inorganic substance such as alum, aluminum sulfate and the like, and an organic substance such as citric acid, fumaric acid, cono, citric acid and ascorbic acid can be used alone or in combination of two or more kinds. In particular, alum, aluminum sulfate, and ascorbic acid are preferable as pH adjusters from the viewpoint of not impairing the exothermic characteristics. Further, it is preferable that the pH adjuster has an average particle size of 50 m or less from the viewpoint of dispersibility in cosmetics. Furthermore, the non-aqueous cosmetic of the present invention may appropriately contain a surfactant or a powder for improving the cleaning effect, and an oil or other cosmetic component for improving the feel or removal performance after use. can do. For example, silicone oil or the like can be used to improve the feel, and squalane, liquid paraffin, vaseline, silicone oil, ester oil, olive oil, jojoba oil, or the like can be used to improve the removal performance. The compounding amount is preferably 0.01 to 30% by weight in the total cosmetic composition from the viewpoint of heat generation.

When the non-aqueous cosmetic of the present invention is applied to, for example, wet skin, an appropriate warm feeling is obtained by contact with water and hydration heat is generated, and a good massage effect and cleansing effect are exhibited. Example

In the following examples, the average particle size of the crystals was measured using a laser diffraction / scattering type particle size distribution analyzer LA-700 manufactured by HORIBA, Ltd. using ethanol as a dispersion medium. Example 1

122 g of aluminum hydroxide (H10 manufactured by Showa Denko KK) and 238 g of calcium carbonate (light calcium carbonate manufactured by Kamishima Chemical Co., Ltd.) were mixed and calcined at 1250 ° C for 4 hours. The obtained fired product was pulverized and passed through a 400 mesh sieve. In the powder obtained white composition ratio x / y of the CaO and A1 ₂ 0 ₃ is 3/1, X-ray diffraction pattern was shall be equivalent to JCPDS No. 38-1429. Its average particle size was 5ΠΚ BET specific surface area was 6.6 m ² / g. Example 2

170 g of aluminum hydroxide (H42 manufactured by Showa Denko KK) and 190 g of the same calcium carbonate as in Example 1 were mixed and fired at 1300 ° C. for 4 hours. The obtained fired product was pulverized and passed through a 400 mesh sieve. In the powder obtained white composition ratio x / y of the CaO and A1 ₂ 0 ₃ is 1 2/7, X-ray diffraction pattern was equivalent to JCPDS No. 9-413. The average particle size was 13 m, and the BET specific surface area was 5.5 m ² / g.

Example 3 100 g of the calcium aluminate obtained in Example 2 was suspended in 400 g of ion-exchanged water, and the suspension was hydrated at 600 ° C. for 2 hours. The obtained calcined product was pulverized and passed through a 400 mesh sieve. The obtained powder was white, and the X-ray diffraction pattern contained more background portions than that of Example 2, but corresponded to ΔCPDS No. 9-413. The average particle size was 28 / im, and the BET specific surface area was 33 m ² / g.

Test example 1

The exothermicity and pH of the calcium aluminate obtained in Examples 1 to 3 were measured according to the methods described below. As comparative examples, anhydrous 4A type zeolite (Comparative Example 1; average particle size 2 m, BET specific surface area 5.0 m ² / g) and quicklime (Comparative Example 2; average particle size 12 m, BET specific surface area 0. 5 m ² / g).

(Test method)

10 g of the calcium aluminate powder obtained in the example or the powder of the comparative example was charged into 40 g of ion-exchanged water at room temperature, and the temperature of the suspension was measured with a thermocouple while stirring. The pH of the suspension was measured 10 minutes after stirring.

(Result)

Figure 1 shows the heat generation curve. It was found that all of the calcium aluminates of Examples 1 to 3 had higher exothermicity and higher exothermic durability than the anhydrous zeolite of Comparative Example 1. Note that the calcined lime of Comparative Example 2 had an excessively high exothermic temperature and was not suitable for use as a heating agent for cosmetics.

Table 1 shows the pH after 10 minutes of stirring. It was found that any of the calcium aluminates of Examples 1 to 3 of the present invention exhibited a lower pH than the quicklime of Comparative Example 2. table 1

Example 4 Massage cosmetics

(Component) (% by weight) Calcium aluminate (Example 1) 20.0 Polyethylene glycol (Weight average molecular weight 2000) 8.0 Polyethylene glycol (Weight average molecular weight 200) 10.0 Propylene dalicol

Fine aluminum oxide

(Specific surface area 100m ² / g, primary particle diameter 13nm) 2.0 Hydroxypropylcellulose 1.0 Kaolin 10.0 Example 5 Cleansing agent

(Ingredient) (% by weight) Calcium aluminate (Example 2) 25.0 Glycerin 5.0

1,3-butylene glycol 15.0 polyethylene glycol 400

Acrylic acid ・ Methacrylic acid copolymer

(Bemren TR-1, BF Goodrich) 0.5 Amidopropyl laurate benzoin 0.5 Potassium lauryl phosphate 0.5

Sodium chloride 5.0

Example 6 Pack cosmetics

(Ingredients) (% by weight)

Calcium aluminate (Example 3) 10.0

1,3-butanediol

Dipropylene dalicol 20.0

Glycerin 5.0

Fine aluminum oxide

(Specific surface area 100m ² / g, —next particle diameter 13nm) 10.0

Dimethylpolysiloxane [6cmVsec (25 ° C)] 2.0

Polyoxyethylene methylpolysiloxane copolymer 3.0 Industrial applicability

As described above, the calcium aluminate used in the present invention has a higher exothermic property than the conventional anhydrous zeolite, and has a lower pH during use than quick lime. Therefore, the heating agent of the present invention containing this as a main component is incorporated in non-water cosmetics used for applications such as body care, face care, hair care, dental care, deodorant, hair removal and hair removal. It is suitable as a heating agent.

Claims

The scope of the claims

1. Thermal composed mainly of calcium aluminate one DOO compound represented by the composition formula _{_{xCaO'yAl 2 0 3 (x / y}} = 0.5~4.0).

2. Calcium aluminate compounds, thermal agent according to claim 1, wherein those having an X-ray diffraction pattern derived from 12Ca0 · 7A1 ₂ 0 ₃ and 3Ca0 · A1 ₂ 0 ₃ or Re noise.

3. The heating agent according to claim 1, wherein the calcium aluminate compound has an average particle size of 50 m or less and a specific surface area of lm ² / g or more.

4. A non-aqueous cosmetic containing the heating agent according to any one of claims 1 to 3.

5. A skin warming method, wherein the non-aqueous cosmetic according to claim 4 is applied to wet skin, or the non-aqueous cosmetic is applied to the skin together with water.