JP2003081811A - Bathing agent for thickening bath water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the greatest problem how readily and uniformly a water-soluble polymer is dissolved in bath water to thicken the bath water in a method for thickening the bath water by using the water-soluble polymer. SOLUTION: This bathing agent comprises a liquid oil, a cationic surfactant, a nonionic surfactant and a sodium polyacrylate powder as basic constituent components. The respective amounts of the basic components constituting the bathing agent are within the following ranges. 25-80 wt.% of the liquid oil, 0.5-5 wt.% of the cationic surfactant, 5-20 wt.% of the total amount of a nonionic surfactant having <=7 HLB and a nonionic surfactant having >=8 and <=14 HLB and 5-65 wt.% of the sodium polyacrylate powder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathing agent, in which the bath water is thickened with water-soluble sodium polyacrylate,
The present invention relates to a bathing agent that imparts moisturizing properties to the skin at the same time as a thickening feeling.

[0002]

2. Description of the Related Art There are various types of bath salts, which are mainly effective for medicinal action, relaxing action for relieving stress, and relaxing action for skin irritation. Recently, in addition to these, bath agents that apply the thickening effect of water-soluble polymers to increase the viscosity of the bath water to a comfortable level and to impart lubricity suitable for performing beauty treatment in the bath water are commercially available. Has been done.

[0003]

SUMMARY OF THE INVENTION In the method of thickening a bath water using a water-soluble polymer, the first problem is how to dissolve the polymer in the bath water quickly and uniformly to increase the viscosity of the bath water. Whether to increase. Among the water-soluble polymers, sodium polyacrylate, which has excellent thickening and skin moisturizing effects, is provided as a solid powder. To dissolve this powder in the bath water, stir the bath water vigorously. While gradually adding powder,
Stirring must be continued for a long time until it is homogeneously dissolved. If you add a large amount at once or stop stirring in the middle,
It will become a lump and will take longer to dissolve.
Therefore, it is difficult to put the powder into practical use if it remains in this powder form. So, sodium polyacrylate and its solubilizing agent, as well as other minor components having bathing effect and pigments for coloring bath water, etc. were integrally processed into a granular form, and a bathing agent with improved solubility was put to practical use. There is. Also in these products, it takes some time from the time when the bath agent is put into the hot water until the solution is uniformly dissolved, and further improvement has been demanded. An object of the present invention is to provide a bathing agent in which sodium polyacrylate is immediately dissolved when the bathing agent is added to the bath water during bathing, and the viscosity of the bath water increases.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, have completed a bathing agent which, when added to a bath water, melts and thickens uniformly at an unprecedented rate. Came to do. That is, the present invention is a bathing agent containing liquid oil, a cationic surfactant, a nonionic surfactant, and sodium polyacrylate powder as basic constituent components. Each of the basic components constituting the bathing agent is a liquid oil content of 25% by weight.
To 80, cationic surfactant 0.5 to 5, HLB7
A bath agent in which the total of the following nonionic surfactants and nonionic surfactants having an HLB of 8 or more and 14 or less is in the range of 5 to 20 and sodium polyacrylate powder 5 to 65.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The bath agent of the present invention is a fluid dispersion in which the surface of each finely powdered sodium polyacrylate particle surface is covered with a liquid oil, a cationic surfactant and a nonionic surfactant. . When this is added to the bath water, the liquid oil is instantly emulsified by the nonionic surfactant and dispersed in the bath water. At the same time, the sodium polyacrylate particles covered with oil also disperse with the cationic surfactant adsorbed on the surface. As a result, re-aggregation of the sodium polyacrylate particles due to the dissolution of the particles is unlikely to occur, and the dissolution proceeds uniformly in the state of the primary particles to increase the viscosity. From this viewpoint, each component constituting the bath agent of the present invention,
The composition is chosen. Hereinafter, the present invention will be described in more detail.

The liquid oil of the present invention includes liquid paraffin, hydrocarbons such as squalane, synthetic oils such as isopropyl myristate, cetyl octanoate and diisostearyl malate, olive oil, jojoba oil, coconut oil, palm oil, sunflower. Oil, avocado oil, almond oil, nuka oil, soybean oil,
Examples include animals and plants such as lanolin and mink oil. These liquid oil components may be used alone or in combination of two or more.
The liquid oil content is in the range of 25 to 80% by weight.
It is preferably 35 to 65% by weight. If the amount of the liquid oil content is less than 25%, the sodium polyacrylate powder will not be uniformly dispersed when added to the bath water, and will be in the form of a ball or dumpling, which requires a long time for dissolution. Also, 80
When the content is more than 100%, it dissolves instantly, but since the blending amount of sodium polyacrylate becomes small as a result, an appropriate viscosity cannot be obtained.

The cationic surfactant used in the present invention is a quaternary ammonium salt such as behenyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, dipolyoxyethyleneoleylmethylammonium chloride. is there. Among these, those having higher safety are preferable. The range of the compounding amount of the cationic surfactant is 0.5 to 5% by weight. If it is less than 0.5% by weight, sodium polyacrylate will not be dispersed in the form of particles when added to the bath water, and will tend to be in the form of lumps, requiring a long time for dissolution. On the other hand, if the amount is 5% by weight or more, the particles are dispersed in the form of particles, but it takes a long time to completely dissolve them. It is properly selected in the range of 0.5 to 5% by weight in relation to the particle size (surface area) of the sodium polyacrylate powder.

Examples of the nonionic surfactants used in the present invention having an HLB of 7 or less include POE (polyoxyethylene) lauryl ether, POE oleyl ether, POE nonylphenyl ether, sorbitan monolaurate and POE sorbitan mono. Oret, POE
Sorbitan trioleate, POE hydrogenated castor oil, and the like. These can be used alone or in combination of two or more. Next, for HLB 8 or more and 14 or less, P
OE lauryl ether, POE oleyl ether, PO
E noniphenyl ether, POE sorbitan monourarate, POE sorbitan monopalmitate, POE sorbitan monostearate, POE sorbitan monooleate, POE hydrogenated castor oil and the like. These can be used alone or in combination of two or more.

In the present invention, by using two kinds of nonionic surfactants having different HLB ranges, sufficient emulsification of a liquid oil and dispersion and dissolution of sodium polyacrylate particles are achieved when it is added to a bath water. To be done. If only one type is used, the emulsification is insufficient, the particles are not well dispersed,
It will be in an aggregated state and will take a long time to dissolve. HLB is 15
When the above-mentioned substances are used, the sodium polyacrylate particles are fixed to each other during storage of the bathing agent, and uniform dispersion cannot be achieved. Regarding the blending amounts of the two types of nonionic surfactants having different HLB ranges, the most preferable ones in the emulsified state and the dispersed state of the particles of the present invention are selected in relation to the type and the blending amount of the liquid oil component. The compounding range is 5
To 20% by weight.

The sodium polyacrylate powder used in the present invention dissolves in water and exhibits a high viscosity.
% Aqueous solution viscosity (rotary viscometer, 30 rpm) is 300c
Ps or more is preferable. The smaller the particle size of the powder, the faster the dissolution, which is preferable. In the present invention, those having 30 mesh or less can be applied.

In addition to the above-mentioned basic components, the bath agent of the present invention usually contains a bath agent, a fragrance and a pigment used in cosmetics,
Ingredients such as inorganic salts, crude drug extracts, crude drug powders, proteolytic enzymes, sequestering agents, etc. can be appropriately selected and appropriately mixed. For example, peppermint oil, mandarin oil, ginseng oil and the like as the fragrance, copper chlorophyll sodium as the pigment, other red, yellow, blue, dyes and pigments as the inorganic salts sodium sulfate, sodium carbonate, sodium hydrogen carbonate, carbonic acid. Calcium, magnesium carbonate, sodium chloride, sodium sulfide, sodium sulfate, etc., herb extracts such as mugwort, aloe, cucumber, loquat, etc., herbs, licorice powder, hinokitiol, etc. as sequestering agents Can be EDTA, sodium gluconate, or the like.

The bathing agent of the present invention is manufactured as a fluid dispersion by mixing the above-mentioned components in a predetermined amount, heating as necessary, and stirring to uniformly mix and disperse each component. By adding this bathing agent to the bath water, the viscosity of the bath water is increased to impart a thickened feeling and a proper slipperiness, and a moisturizing effect to the skin is given. The amount of bathing agent added to the bathing water achieves the bathing agent intended by the present invention with an amount of bathing agent corresponding to 0.02 to 0.04% of sodium polyacrylate contained in the bathing agent with respect to the amount of bathing water. it can.

[0013]

EXAMPLES Examples of the present invention are shown in Table 1 together with comparative examples. The evaluation results are shown in Table 2. The bathing agent was mixed with the components shown in Table 1, stirred at 60 ° C. for about 10 minutes until the respective components were sufficiently dissolved or mixed and dispersed, and allowed to stand at room temperature in that state to prepare a sample. 1. Evaluation of sample solubility, a certain amount of water at 40 ℃,
A sample amount of a bathing agent having a sodium polyacrylate concentration of 0.03% was added by a fixed method, and the dispersion and dissolution state of the sample were visually observed and compared. Since the sodium polyacrylate particles settle to the bottom when the prototype sample was left in the chamber, the test sample was stirred under a certain condition before the test, and the evaluation was started in a uniform state. 2. Evaluation of the storage stability of the sample, after filling a fixed amount of the sample in an elongated closed container and leaving it in the chamber for 30 days, shake the container to fix the sodium polyacrylate particles to each other, evaluated. Each evaluation was performed in the following 1 to 3 stages. Dispersion solubility 1. Sodium polyacrylate particles are dispersed as primary particles and dissolve within 1 minute. 2. Sodium polyacrylate particles become clusters and do not dissolve even after 5 minutes. 3. Sodium polyacrylate particles clump together to settle on the bottom of the container and do not dissolve after 10 minutes. Storage stability 1. Shake the container lightly to return to the original uniform fluid dispersion. 2. Shaking the container vigorously gives a uniform fluid dispersion. 3. It does not become a uniform mixture even when shaken by sedimentation and solidification.

[0014]

The bathing agent of the present invention, when added to a bath water, increases the viscosity of the bath water at a speed not found in conventional products,
It has a pleasant viscosity and slipperiness suitable for beauty treatment in bath water. In addition, sodium polyacrylate molecules are adsorbed on the skin to keep the skin moist due to the moisturizing effect.

Claims (2)

[Claims] 1. A bath agent comprising a liquid oil, a cationic surfactant, a nonionic surfactant, and sodium polyacrylate powder as basic constituent components. 2. A total of 5 to 80% by weight of a liquid oil, 0.5 to 5% by weight of a cationic surfactant, a nonionic surfactant having an HLB of 7 or less and a nonionic surfactant having an HLB of 8 or more and 14 or less. The bath salt according to claim 1, comprising 20% by weight and 5% to 65% by weight of sodium polyacrylate powder.