JP2000212064A - Bath agent composition containing silk powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath agent composition, retaining original characteristics of silk, good in feeling when used, and giving water retentivity and pleasantness to the skin. SOLUTION: This composition contains silk produced by domestic or wild silkworms, finely divided to 1 to 100 μm in size, at 1 to 100 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath composition which is excellent in feeling of use and gives water retention and refreshing feeling to skin.

[0002]

2. Description of the Related Art A bath composition generally comprises a mixture of an inorganic salt and a fragrance, a colorant, etc., which imparts aroma and color to the bath water and reduces fatigue due to the effect of the inorganic salt on promoting blood circulation and warming. Provides recovery and relaxation. However, although the conventional bath agent composition can provide a heat retaining effect, many of the bath agent compositions cause the skin to become bulky or have a tight feeling after bathing. In recent years, with the aim of improving the tightness of the skin after bathing,
Bath agent compositions containing oily substances, water-soluble polymers, plant extracts, etc. are seen, but the improvement effect is insufficient,
There is a problem that the skin becomes sticky.

In order to solve this problem, for example, Japanese Unexamined Patent Publication No. Hei 6-321768 proposes a bath composition containing a silk hydrolyzate. Silk fiber has a light feeling of use, water retention, gloss, etc. as its characteristics, and gives water retention and exhilaration to the skin, but when the silk fiber is hydrolyzed, the above characteristics are lost, The original effect of silk does not appear.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an excellent feeling of use without losing the original characteristics of silk, and to provide water retention and refreshing to the skin. An object of the present invention is to provide a bath composition that gives a feeling.

[0005]

The bath composition of the present invention contains a silk protein produced by dividing silk produced by a silkworm or a wild silkworm to a particle size of 1 to 100 μm, and the content of the silk protein is 1%. -100% by weight.

As the silk used in the present invention, silk fibers such as cocoons, raw silks and silks produced by silkworms or wild silkworms are boiled in an aqueous solution of sodium carbonate or sodium hydroxide to weaken the strength of the fibers. After that, it was neutralized and dried.

[0007] The silk fiber is composed of two types of proteins, two fibroins and sericin that binds the fibroin. Most of the sericin is removed in the boiling process. After drying, the silk protein is pulverized by a commonly used pulverizer and atomized.

The particle size of the finely divided silk protein (hereinafter referred to as silk powder) used in the present invention is as follows:
If the thickness exceeds 100 μm, the aggregation of the silk powder is likely to occur, and it is difficult to atomize the powder to less than 1 μm.
It is limited to 1 to 100 μm. The average particle size is 10
~ 50 μm is preferred.

Since the silk powder retains the molecular structure of fibroin constituting cocoon thread, raw silk, silk thread, etc. as it is, the silky fiber has a smooth feeling of use, moisturizing property, hygroscopic property and luster. The bath agent composition containing this silk powder has an excellent feeling in use and gives water retention and refreshing feeling to the skin.

When the content of the silk powder contained in the bath composition of the present invention is less than 1% by weight, the above-mentioned effect of the silk fiber is not exhibited, and the content needs to be 1% by weight or more. It is. Of course, a bath agent composition of 100% by weight of powdered silk may be used.

Other components to be added to the bath composition of the present invention together with the above-mentioned silk powder include inorganic salts, organic acids, fine powders, fats and oils, and waxes which are components of the conventionally known bath compositions. , Hydrocarbons, higher fatty acids, alcohols, esters, water-soluble polymers, surfactants, crude drugs, pigments, fragrances,
Preservatives and the like can be mentioned, and are appropriately blended as needed.

Examples of the inorganic salts include sodium hydrogen carbonate, sodium carbonate, magnesium carbonate, potassium chloride, sodium chloride, calcium nitrate, potassium nitrate, sodium nitrate, sodium sulfate, aluminum sulfate, magnesium sulfate, alum, borax and the like. No.

The organic acids include, for example, succinic acid,
Fumaric acid, phthalic acid, malic acid, citric acid, tartaric acid and the like. Examples of the fine powder include titanium oxide, talc, smectite, natural aluminum silicate, zeolite, and the like. Examples of the fats and oils include soybean oil, brass oil, olive oil, castor oil and the like, and examples of the waxes include beeswax and lanolin.

Examples of the hydrocarbon include liquid paraffin, squalane and petrolatum, and examples of the higher fatty acid include lauric acid, myristic acid, and the like.
Palmitic acid, stearic acid, linoleic acid, linolenic acid and the like can be mentioned.

Examples of the alcohol include stearyl alcohol, cetyl alcohol, oleyl alcohol, glycerin, polyethylene glycol, dipropylene glycol, sorbitol, ethanol, cholesterol and the like. Examples of the esters include:
Examples include isopropyl myristate, cetyl octanoate, myristyl lactate, cholesterol isostearate, and isopropyl adipate.

The water-soluble polymer includes, for example, sodium alginate, xanthan gum, polyvinyl alcohol and the like.

Examples of the surfactant include sodium lauryl sulfate, sodium polyoxyethylene lauryl ether sulfate, diethanolamide laurate, glycerin monostearate, polyethylene glycol monostearate, fatty acid soap, and N-acylglutamic acid. Can be

Examples of the above crude drugs include herbs, cocks, touki, peonies, perilla, mugwort, chamomile,
Mentha, gibberell, peach, aero, loofah and the like. Examples of the dye include Blue No. 1, Blue No. 2,
Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), riboflavin and the like. Examples of the preservative include paraoxybenzoate, sorbic acid, salicylic acid, sodium dehydroacetate and the like.

[0019]

The bath preparation composition using the silk of the present invention contains silk protein produced by micronizing silk produced by silkworm or wild silkworm to a particle size of 1 to 100 μm, and the content of the silk protein is 1 to 100 μm. Since it is the weight%, it does not lose the original characteristics of silk, is excellent in use feeling, and gives water retention and exhilaration to the skin.

[0020]

EXAMPLES (Preparation of Silk Protein Powder of Silkworm) Silk fibers obtained from silkworm were refined and pulverized to obtain silk powder. The molecular weight measured by the gel filtration method was 10,000 or more, and the average particle size measured by a Coulter counter was 10 to 60 μm, the maximum was 100 μm, and the minimum was 1 μm.

(Preparation of Bath Agent Composition) The above-mentioned silk powder and other powder or liquid components were mixed according to a conventionally known method with the compositions shown in Table 1, and the bath agent compositions of Examples 1 to 3 were prepared. Was prepared. Further, without using the silk powder, other powder or liquid components were mixed according to the composition shown in Table 1, and Comparative Example 1 was used.
-3 bath preparation compositions were prepared.

[0022]

[Table 1]

(Evaluation as Bath Agent) Twenty test subjects were bathed in a bath in which the bath agent compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were added to bath water, and the evaluation was made according to the following evaluation criteria. The usability was evaluated.

(Evaluation Criteria) 5 points where the feeling of use is good and the skin after bathing is very smooth.・ The skin feels smooth after bathing 4 points.・ Normal 3 points. -The feeling of use is not very good, and the skin becomes bulky after bathing. -The feeling of use is not good, and the skin becomes very bulky after bathing.

(Evaluation Results) Table 2 shows the results.

[0026]

[Table 2]

In this example, silkworms were used. Instead of silkworms, natural silkworms, saksan, erysan, tasarsang, mugasan, and cricula were used. Silk powder was obtained in the same manner as the silkworm of the above-described example. Using the silk powder, a bath agent composition was prepared in the same manner as in Examples 1 to 3, and the same evaluation was performed. As a result, almost the same evaluation results were obtained.

[0028]

According to the present invention, the bath agent composition of the present invention has the above-mentioned constitution, and according to the present invention, it has excellent feeling in use without losing the inherent characteristics of silk, and gives water retention and refreshing feeling to the skin. A bath composition is provided.

Claims (1)

[Claims] Claims: 1. A silkworm produced by a domestic or wild silkworm,
A bath composition comprising a silk protein finely divided to a particle size of 00 μm, wherein the content of the silk protein is 1 to 100% by weight.