JPS61210015A - Powder or granular external preparation for skin - Google Patents

Abstract

PURPOSE:A granular cleaner, powdered cosmetic or massaging material showing improved emollient effects, containing chitosan powder acidic powder. CONSTITUTION:The titled external preparation for the skin containing 1-50% chitosan and 0.2-50wt% (preferably >=1/5 chitosan powder). Acidic powder which can be usually blended with an external preparation for the skin, such as malic acid, tartaric acid, aspartic acid, glutamic acid, ascorbic acid, carboxyvinyl polymer, further powder obtained by adsorbing a liquid acid such as acetic acid, etc., on anhydrous silicic acid, etc. are used as the acidic powder. The use of the external preparation for the skin provides improved emollient effects, obviating demerits such as stretching of the skin, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a powder or granular skin preparation for external use that exhibits an excellent emollient effect by incorporating chitosan powder and acidic powder into the formulation.

[Prior art] Conventional powdered external preparations for skin use have either a surfactant as the main ingredient, which is lathered with water, and are used mainly for the cleansing effect, or are formulated with a water-soluble saccharide powder as the main ingredient. In most cases, they were applied as an aqueous solution, and most of them were mainly aimed at moisturizing effects.

In more detail, powdered skin preparations expected to have a cleansing effect are mainly composed of fatty acid soaps or synthetic surfactants, with inorganic powders such as talc and kaolin, and insoluble crystalline cellulose as fillers.

A cleaning effect can of course be expected if a certain amount of detergent is added to the formulation, but these formulations require consideration to include substances that exert an emollient effect after use.

On the other hand, external skin preparations such as skin whitening powders that contain sugar powder as the main ingredient and contain whitening agents such as vitamin C do not have a great moisturizing effect due to the sugar powder in the formulation, so they are more effective than expected skin whitening effects. Ingredients such as vitamin C
In many cases, saccharide powder acts as a filler, and as with external skin preparations for cleansing, no consideration has been given to the emollient effect after use.

Even if an attempt was made to incorporate an ingredient with an emollient effect into a powdered external skin preparation, due to the characteristics of the powder formulation, liquid or paste oils, which are said to have the most emollient effect, could not be included, and as a result, after use, It lacks consideration for the emollient effect.

Conventional skin preparations that lack consideration have had drawbacks such as being difficult to read after use.

[Problems to be Solved by the Invention] In view of the above circumstances, the present inventors have conducted intensive research and found that if an acidic powder is blended with chitosan powder in the formulation, a powder or granule form that has an excellent emollient effect after use. The present invention was completed by discovering that not only cleaning agents and powdered cosmetics but also pine surge agents could be obtained.

[Means and effects for solving the problems] That is, the present invention is a powder or granular skin preparation for external use, which is characterized by containing chitosan powder and acidic powder.

Hereinafter, the configuration of the present invention will be explained in detail.

Chitosan used in the present invention is obtained by deacetylating chitin, which is present in the shells of crustaceans such as crabs and shrimps, the exoskeleton of insects, or the cell walls of bacteria and algae, with a δ alkali.

As a more specific example, crab and shrimp shells are treated with dilute hydrochloric acid to decalcify and then treated with dilute sodium hydroxide solution to deproteinize. The obtained crude chitin is washed with water, purified if necessary, and then deacetylated with a concentrated sodium hydroxide solution. The obtained crude chitosan is washed with water, purified if necessary, dried, and pulverized to obtain chitosan powder according to the present invention.

The amount of powdered chitosan to be blended is 0.5% to 70% (hereinafter simply referred to as %), and at a level of 0.5% or less, it is difficult to exhibit the effects of the present invention, and 70% or less. If the amount is exceeded, the amount of chitosan in the formulation will inevitably become too large, and the amounts of other necessary acidic powders and skin external preparation bases will decrease, making it difficult to achieve the effects of the present invention as well as the original performance as a skin external preparation. Become.

Preferably it is 1 to 50%.

On the other hand, the acidic powder used in the present invention is usually an acidic powder that can be blended into external skin preparations, such as low-molecular acid powders such as malic acid, tartaric acid, succinic acid, and citric acid, acidic amino acids such as aspartic acid and glutamic acid, or pyrrolidone. In addition to carboxylic acid, ascorbic acid, and polymeric substances such as carboxyvinyl polymers, powders obtained by adsorbing liquid acids such as acetic acid and lactic acid to silicic anhydride, cellulose powder, etc. can also be blended.

One or more of these acidic powders are present.

According to the present invention, the amount of acidic powder blended into the skin external preparation with chitosan powder is 0.2 to 50%, which is determined depending on the expected emollient effect, but it is 1/1o or more based on the amount of chitosan. An amount of 3 times or less is necessary to exhibit the effects of the present invention, and is preferably 115 times or more of the amount of chitosan. When blending for purposes other than the effects of the present invention, the upper limit is not limited to this.

As the skin external preparation base in which chitosan powder and acidic powder are blended, a usual powdered skin external preparation base can be used.

For example, products that claim to have a cleansing effect generally have fatty acid soaps, acyl glutamates, alkyl sulfates, alkyl phosphates, etc. as their main ingredients, and are usually added to powdered skin for external use as needed. Moisturizing agents, excipients, agents such as bactericides, pigments, fragrances, etc. are added.

Powder skin preparations with moisturizing effects are mainly composed of sugar powder excipients such as sucrose, lactose, maltose, sorbitol, and mannitol, and if necessary, vitamin C, vitamin B6 hydrochloride, It can be used in combination with effective ingredients such as allantoin. Needless to say, ingredients that modify external skin preparations, such as pigments and fragrances, can be used in combination.

These external skin preparations, which claim to have cleansing and moisturizing effects, may be made into granules by granulation if necessary. This method can also be used for fir. Namely, stirring granulation, extrusion granulation, fluidized bed granulation, crushing granulation, etc. are well known. Some granulation methods require a binder, in which case any conventional binder can be used.

By mixing the chitosan powder, acidic powder, and powder skin external preparation base in an appropriate manner using the above method, and subjecting it to granulation treatment in some cases, the powder or powder with excellent emollient effect after use according to the present invention is prepared. A granular skin preparation for external use is obtained.

The obtained external skin preparation did not have any drawbacks such as tightness of the skin after use, and showed excellent emollient effect after use, compared to the case where the external skin preparation did not contain chitosan powder or acidic powder.

"Example" 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 thereto.

<Example 1> Cleansing powder acyl glutamate 20wt% (product name
Amisoft LS-11) Chitosan powder 50 Citric acid 20 Talc
10 Fragrance Appropriate amount Comparative Example 1> Cleansing powder acyl glutamate 20 wt% (product name Amisoft LS-11) Polyethylene powder 5° citric acid 20 talc
10 Fragrance Appropriate amount Comparative Example 2 Cleansing powder acyl glutamate 20 wt% (Product name Amisoft LS-11) Chitosan powder 50 Talc 30 Fragrance Appropriate amount Comparative example 3 Cleansing powder Acyl glutamate 20 wt% (Product name Amisoft LS-11) ) Polyethylene powder: 50% Talc: 30% Perfume Appropriate amounts of each component are mixed and ground, and then a perfume is sprinkled on the mixture to obtain a powdered skin preparation.

In Example 1, the present invention is applied and both chitosan powder and acidic powder are blended.

- In Comparative Examples 1, 2, and 3, either the chitosan powder or the acidic powder, or the additive was not completely blended.

Therefore, the feel after use is excellent in Example 1, but unsatisfactory in Comparative Examples 1, 2, and 3.

This remarkable difference in usability is the result of applying the technology according to the present invention in Example 1.

The feel after use was evaluated by using each sample by 20 professional beauty technicians and using a 10-point scale to evaluate the feel of the skin after use, such as firmness.

Average score 8 points or more Evaluation Less than 08 points 5 points or more Evaluation △ Less than 5 points Evaluation × <Example 2> Pine Surging Scrub Chitosan Powder
30wt% tartaric acid
10 Malic acid 10 D-Mannitol 20 Cellulose powder
29 Perfume Appropriate amount Methylcellulose 1 After mixing and pulverizing powdered raw materials from chitosan to cellulose powder, granules are granulated by a fluidized granulation method using a 1% aqueous solution of methylcellulose as a binder. The obtained granules were sieved and a portion of 32 to 60 mesh was selected and a fragrance was sprayed thereon to obtain a pine surging scrub.

When this external skin preparation was used by 25 professional beauty technicians, none of them complained of feeling stiff after use.

<Example 3> Fresh Powder Chitosan Powder 1wt% Carboxyvinyl Polymer 2 Lactose 82 PEG20000 10 L-Ascorbic Acid 5 Pigment Appropriate amounts of each component are mixed and ground to obtain fresh powder.

When the obtained sample was used by 25 professional beauty technicians, all of them felt an excellent emollient effect after use, similar to the case of Example 2.

Example 4 Body washing sauce. Inktosan powder 70wt% citric acid
1. Aspartic acid 5. Soap bundle 5. Refined sugar 8. Fragrance Appropriate amount Ethyl cellulose 2. Powdered raw materials from chitosan to refined sugar are mixed and pulverized, and then granulated by extrusion granulation using a 10% ethanol solution of ethyl cellulose as a binder. After drying and sieving, perfume was sprinkled on the granules of 28 to 48 mesh to obtain body washing grains.

The resulting body washing grains were used by 25 professional beauty technicians, and 24 of them said they felt an emollient effect after using the product and did not experience any stiffness.

One person said that it was hard to read after using the product, but a survey revealed that this person had extremely dry skin with very little sebum.

Claims (1)

[Claims] A powder or granular skin preparation for external use, characterized by containing chitosan powder and acidic powder.