JPH0439444B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an external skin preparation containing granules granulated with a water-insoluble binder in its formulation, and more particularly to an external skin preparation that has an excellent cleaning effect or massage effect. Conventionally, external skin preparations such as cleansing cosmetics have been developed with the aim of exerting the cleaning effect of the prescribed cleansing agent by hand, brush, sponge, or the like. In addition, external skin preparations such as cosmetics for pine surges have been designed to improve the slippage of the hands or pine surge tools through the use of oil in the formulation, thereby exerting the pine surge effect. There has been some research aimed at increasing the cleaning and pine surge effect by adding granular substances to cosmetics for cleaning and pine surge, but none of the granular substances were made by granulating fine powder and were made by granulating particles of a certain size. It was a single granule with no change in size during washing or pine surgery. The size of the granular material has a great influence not only on the cleaning and pine surge effect itself, but also on the feeling of satisfaction after cleaning or after the pine surge. In other words, the amount and size of the granular material is selected depending on the desired cleaning and pine surge effect, but unless the granular material is a certain size, the presence of the granular material cannot be detected and the effect may actually be promoted. and feel less satisfied. On the other hand, if the size of the granular material is too large, it will feel strange on the skin. In view of these circumstances, the inventors of the present invention have conducted intensive research and found that the size of the object, which was comfortable at the time of cleaning or pine surgery, does not gradually become uncomfortable halfway through, and when cleaning or pine surgery is started, We discovered that in order to be able to use the product comfortably from the beginning until the end of the process and enjoy a sense of satisfaction, it is necessary for the granules to gradually become smaller during use, and based on these findings, we have completed the present invention. Ivy. That is, the present invention involves blending, as a water-insoluble binder, granules granulated with one or more of ethyl hydroxyethyl cellulose, acetyl cellulose, nitrocellulose, and ethyl cellulose with a degree of substitution of 2.0 or more, and using the mixture by straining. The present invention provides a distinctive skin preparation for external use. Hereinafter, the configuration of the present invention will be explained in detail. In the present invention, the skin external preparation used by rubbing refers to the skin external preparation used by appropriately pressing and sliding the agent onto the skin, and specifically includes cleaning products such as cleansing foam, cleansing powder, and cleansing cream. fees, pine surge cream,
Examples include pine surging agents such as pine surging gel. The water-insoluble binder used in the present invention can be of a quality that is normally used as a binder in granulation. These binders are dissolved in a solvent and granulated by, for example, a fluidized granulation method or an agitation granulation method. As the solvent used in this case, any solvent can be selected depending on the binder used or the granulation method. For example, general-purpose organic solvents such as aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, etc. may be used singly or in combination of two or more as necessary. It can be used as As the substance to be granulated in the present invention, any powder that is insoluble in water can be used.
Examples include common inorganic pigments such as talc, titanium oxide, and kaolin, and water-insoluble salts such as calcium carbonate and calcium phosphate. Moreover, general-purpose polymeric materials can also be used. Namely, hydrocarbon polymers such as polyethylene, polypropylene, and polystyrene, polyamide polymers such as nylon, vinyl polymers such as polyvinyl chloride and polyvinylidene fluoride, polyethylene polymers, polyurethane polymers, and the like. copolymers, etc. One or more of these powders are granulated using a water-insoluble binder such as the above-mentioned ethyl cellulose depending on the required purpose. Water-soluble powders can also be used together with the above ingredients, but if only water-soluble powders or a significantly large proportion of water-soluble powders are used, even if they are granulated and blended, It dissolves or dissolves during cleaning or pine surge and does not help promote the cleaning or pine surge effect. Furthermore, pigments, drugs, etc. can be added to the granules as needed. Common granulation methods include fluidized granulation and agitation granulation. That is, the above-mentioned water-insoluble binder is dispersed as a solution in an optimal solvent by a method such as spraying onto the powder being stirred in a fluidized bed or the like. The shape of the spray nozzle, spray time, amount, etc. are selected depending on the target particle size of the granules. After granulation, sieving is performed to obtain granules of the target particle size. The size of the granules granulated according to the structure of the present invention is 0.05 to 2.0 mm, preferably 0.1 to 0.5 mm. If the size is less than 0.05 mm, it will be too small to detect that it has been added, and if it is more than 2.0 mm, it will be too large and cause discomfort to the skin. As a base for an external skin preparation containing the granules cast as described above, a conventional external skin preparation can be used as is. That is, the cleaning agent may be one containing an aliphatic soap or a synthetic surfactant such as acyl glutamate or cetyl sulfate as a main component, and may be in the form of cream, gel, liquid or powder. Also, as the pine surge agent, a cream or gel type can be used. In either case, a water-based or oil-in-water emulsion system (O/W type) is preferable; in the case of an oil-based or water-in-oil emulsion system (W/O type), the binder dissolves and the granules collapse. Leads to. In the present invention, granules granulated with a water-insoluble binder are blended into the skin external preparation in an amount of about 0.1 to 50% by weight (hereinafter simply referred to as %), preferably about 0.5 to 20%. If the level is less than 0.1%, the effect of promoting cleaning and pine surge will be poor, and if the level is more than 50%, the detergent content or oil content of the base itself will decrease, which is not preferable. The skin external preparation according to the present invention has a superior cleaning or pine surge effect compared to a case in which no granular material is blended, and is also easier to use than a case in which a granular substance that does not conform to the structure of the present invention is blended. Great for feeling satisfied afterwards. Next, the present invention and the effects of the present invention will be explained in detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. Production Example 1 Talc with a particle size of 0.01 mm or less is made into a fluidized bed by air blowing in a fluidized granulator and stirred. Ethyl cellulose (substitution degree =
2.5. All ethylcelluloses used below are the same. ) and perform granulation. After that, it is dried and sieved,
Granular talc granulated to 0.2-0.8 mm is obtained. The granular talc obtained in this example is blended into Example 1. Production Example 2 As in Production Example 1, granulation is performed by spraying a 2% ethanol solution of ethyl cellulose onto polyethylene powder having a particle size of 0.02 to 0.05 mm. After drying, granular polyethylene granulated to a size of 0.1 to 0.3 mm is obtained by sieving. The granular polyethylene obtained in this example is Example 2
It is blended into. Examples 1 and 2 and Comparative Examples 1 and 2 Cleansing foam A Stearic acid 5% by weight Palmitic acid 8 Myristic acid 8 Lauric acid 8 Beeswax 2 Glyceryl mono 2 Stearate B Potassium hydroxide 6.5 Glycerin 10 PEG1500 15 Purified water Total 100 Amount C Fragrance 0.5 D Granules 0-10 (Production method) After heating the oil phase part of A and the water phase part of B to 70℃ to completely dissolve them, add the oil phase part into the water phase part while stirring. In addition, neutralization is performed. After the neutralization is completed, the perfume C is added thereto, and then the granules D are dispersed. After that, it is cooled down to a final temperature of 30°C using a heat exchanger, and then filled into containers. Examples 1 and 2 and Comparative Examples 1 and 2 are manufactured according to the above method. Here, Example 1 contains 5% of granulated talc granulated using ethyl cellulose as a binder by the method shown in Production Example 1, and Example 2 contains 5% of granulated talc granulated by the method shown in Production Example 1.
Contains 10% granular polyethylene granulated using ethyl cellulose as a binder by the method shown in . Moreover, Comparative Example 1 did not contain granules, and Comparative Example 2 contained 10% of ungranulated polyethylene. Prescription characteristics and evaluations of each example and comparative example are summarized in Table 1. The cleaning efficiency, discomfort on the skin, and satisfaction after cleaning were evaluated according to the methods described below. 1) Cleaning efficiency measurement method A fixed amount of commercially available foundation (usually 0.2
g) is applied onto a Styrofoam sheet using a printing machine. Next, the sheet coated with the foundation was rubbed with a roller coated with a certain amount of the cleaning material sample at a fixed number of times (5 rotations), at a fixed stroke (10 cm), and at a fixed pressure (200 g load). The ratio of the reflectance of the sheet after cleaning is measured, and this is taken as the cleaning efficiency. Evaluation of cleaning efficiency of 80% or more 〇, 50% or more
Less than 80% was evaluated as △, and less than 50% was evaluated as ×. 2) Evaluation method for discomfort on the skin and satisfaction after washing Each sample was used by 20 professional beauty technicians to evaluate the discomfort on the skin at the beginning of washing and the feeling on the skin at the end of washing. The sense of harmony and satisfaction after cleaning will be scored using a 10-point scale. The values were averaged, and those with 7.5 points or more were evaluated as ○, those with 5 points or more and less than 7.5 were evaluated as △, and those with less than 5 points were evaluated as ×.

[Table] Examples 1 and 2 are examples containing granulated granules. In either case, the cleaning efficiency is high, there is no discomfort during cleaning, and the feeling of satisfaction after cleaning is excellent. Therefore, the overall evaluation is good, but this is due to the effect of blending the granules granulated according to the present invention. On the other hand, although Comparative Example 1 does not contain granules, the cleaning efficiency is lower than that of Examples 1 and 2, and the feeling of satisfaction after cleaning is also lacking. Therefore, the overall evaluation is also bad. On the other hand, Comparative Example 2 is an example in which ungranulated granules are blended, and the size and material of the blended granules are the same as in Example 2. The cleaning efficiency shows almost the same value as in Example 2. However, since the granules contained in the mixture are not granulated, the granulation of the granules does not change until the end of the wash, resulting in a bad feeling of discomfort on the skin at the end of the wash and a lack of satisfaction after washing. It's a bit lacking. Therefore, the overall evaluation is also poor. Example 3 Cleansing Foam Polyethylene powder with a particle size of 0.01 to 0.05 mm was granulated into granules with a particle size of 0.2 to 0.5 mm using acetyl cellulose as a binder using the fluidized granulation method as in Production Example 2 to obtain granulated polyethylene powder. shall be. Note that 3% ultramarine blue is added as a pigment. A Sodium N-lauroyl-L-glutamate 20wt% Sodium lauric sulfate 10 Glycerin 25 PEG400 10 Purified water Amount to make the whole 100 B POE (40) monostearate 2 Glyceryl monostearate 2 C Fragrance Appropriate amount D Granulated polyethylene powder 0.5 After completely dissolving component A at 75℃, add component B and stir. Then add C, then D
Distribute. After cooling to a final temperature of 30°C using a heat exchanger, filling was performed to obtain a cleansing foam containing granulated polyethylene powder. Example 4 Cleansing powder Talc and titanium dioxide (each with a particle size of 0.01
mm or less) in equal amounts, and then granulated into granules with a particle size of 0.05 to 0.1 mm using ethyl cellulose as a binder using the fluidized granulation method as in Production Example 1 to obtain granular inorganic powder. A Fatty acid soap powder (beef tallow: coconut oil = 70:30)
30wt% N-Myristoyl Methyl Taurine 15 POE (20) Cetyl Ether 5 B Hydroxypropycellulose Appropriate amount C Granulated inorganic powder 50 D Fragrance Appropriate amount Component A is ground and mixed, and then granulated using component B as a binder. After mixing the mixture with the granulated inorganic powder (C), the mixture was sprayed with the fragrance (D) to obtain a cleansing powder. Example 5 Cleansing cream Nylon powder with a particle size of 0.01 to 0.03 mm was granulated by stirring and granulated using ethyl cellulose as a binder to form a particle size of 1.0.
Granulate to ~2.0 mm to obtain granulated nylon powder. A Setanol 2.0wt% Beeswax 2.0 Stearic acid 3.0 Vaseline 8.0 Squalane 40.0 Isopropyl myristate 7.0 POE (20) Sorbitan laurate
2.5 Glyceryl monostearate 2.5 Ethylparaben 0.3 Fragrance 0.2 B Glycerin 2.0 Propylene glycol 5.0 Purified water 22.4 Potassium hydroxide 0.1 C Granulated nylon powder 3.0 After heating and dissolving components A and B to 70℃, A oil Add phase to the aqueous phase of B. After emulsifying using an emulsifying machine, the granulated nylon powder of C is dispersed. Thereafter, it is cooled to a final temperature of 30°C using a heat exchanger, and then filled. Example 6 Pine surging jelly Nylon powder with a particle size of 0.005 to 0.02 mm was extruded and granulated using ethyl cellulose and ethyl hydroxyethyl cellulose as a binder.
Granulate to 0.2 to 0.5 mm to obtain granulated nylon powder. A Purified water Amount based on 100% Glycerin 20wt% Propylene glycol 10 Methylparaben 0.1 Carboxyvinyl polymer 0.6 Sodium hydroxide 0.15 B Granulated nylon powder 3 After stirring and dissolving the raw materials in A at room temperature, disperse the granules in B. When the sample of Example 6 was evaluated for usability by 20 beauty technicians in the same manner as in Example 1, all of them were satisfied with the feeling of pine surge.

Claims (1)

[Claims] 1. Skin characterized by blending granules made from one or more of ethyl hydroxyethyl cellulose, acetyl cellulose, nitrocellulose, and ethyl cellulose with a degree of substitution of 2.0 or more as a water-insoluble binder, and using it by rubbing. Topical preparation.