JP7352346B2 - bath salt composition - Google Patents

Description

The present invention relates to a bath additive composition, and particularly to a bath additive composition containing a cationic polymer and a pigment, in which no water-insoluble substances derived therefrom are formed.

BACKGROUND ART Bath additives have traditionally been used to enhance the warm bathing effect and relaxation effect during bathing, and are commercially available in various forms such as solid preparations such as briquettes, tablets, and powders, and liquid preparations. In particular, in recent years, bath additives containing cationic polymers have been sold for the purpose of providing a smooth feel during and after bathing, providing a moisturizing effect, and stabilizing inorganic pigments. For example, Patent Document 1 proposes blending an oil-based component, a nonionic surfactant, and a cationic polymer into a bath additive, which moisturizes the skin after bathing and provides a smooth feel during and after bathing. It is said to bring Furthermore, Patent Document 2 states that by adding a cationized polymer with a specific particle size to a bath agent, it is possible to give the bath water a slimy feel similar to that of a natural hot spring, and to make the skin feel moist after bathing. .

On the other hand, in Patent Document 3, by blending an inorganic pigment coated with a water-soluble polymer and a cationized polymer into a bath agent, good dispersion stabilization of a clouding agent made of an inorganic pigment is achieved over a long period of time, and It is said to be able to prevent the clouding agent from settling to the bottom.

On the other hand, bath additives often contain pigments to give them a bathwater color. However, when bath additives containing cationic polymers and pigments are used, there is a problem in that water-insoluble substances adhere to the bottom and sides of the bathtub after the remaining hot water is drained. This problem also involves changes in bath additives over time; for example, if bath additives are exposed to harsh conditions such as high temperature and high humidity before being used, including during distribution, they may become water-resistant. The generation of insoluble matter becomes noticeable.

Japanese Patent Application Publication No. 2-115115 Japanese Patent Application Publication No. 9-315951 Japanese Patent Application Publication No. 10-72340

Therefore, an object of the present invention is to provide a bath additive composition containing a cationic polymer and a pigment, in which no water-insoluble matter derived from them is formed.

As a result of intensive research to solve the above problem, the present inventors found that in a bath additive composition containing a cationic polymer and a pigment, a pigment having an anionic group is present in the pigment in the bath additive composition. We discovered that when dyes are adsorbed onto cationic polymer particles, the polymer surface becomes hydrophobic, reducing its solubility in water, and the particles also aggregate, forming water-insoluble substances. succeeded in solving the above problem by obtaining the knowledge that the formation of water-insoluble substances can be suppressed by adding a specific surfactant to a bath additive composition containing a cationic polymer and pigments. This is what I did.

Therefore, in one embodiment of the present invention, the following components (A), (B) and (C):
A bath additive composition characterized by containing a surfactant selected from the group consisting of (A) a cationic polymer, (B) a dye, (C) an anionic surfactant, and a nonionic surfactant having an HLB of 10 to 18. provide something.

In the present invention, by blending (C) a specific surfactant into a bath agent composition containing (A) a cationic polymer and (B) a dye, the cationic polymer and the dye, especially the dye having an anionic group, can be combined. It is possible to suppress the formation of water-insoluble substances originating from. In addition, it is possible to avoid the possibility that the expected moisturizing feeling cannot be obtained due to a decrease in the dispersibility of the cationic polymer in bath water, and it is possible to ensure the desired moisturizing feeling by combining the cationic polymer. can.

(A) Cationic polymer In this application, the cationic polymer means a water-soluble polymer having a cationic group and having a molecular weight of 10,000 to 10,000,000, preferably 50,000 to 5,000,000.

The cationic polymer preferably contains a quaternary nitrogen group as a cationic group, more preferably has a nitrogen content of 0.05 to 3.0% by mass, preferably 0.2 to 2.5% by mass, More preferably, it is 0.3 to 1.5% by mass. The nitrogen content can be determined by the colloid titration method (Quasi-drug raw material standards 2006) and the Kjeldahl method (Quasi-drug raw material standards 2006).

(A) Examples of the cationic polymer include O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride, O-[2-hydroxy-3-(lauryldimethylammonio)propyl chloride ] Cationized cellulose such as hydroxyethylcellulose and hydroxyethylcellulose dimethyldiallylammonium chloride; Cationized guar gum such as O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride; Locust bean gum hydroxypropyltrimonium chloride, etc. Cationized locust bean gum; cationized polysaccharide obtained by cationizing polysaccharides such as cationized dextran such as dextran chloride hydroxypropyl trimethylammonium ether, natural gum, starch, chitosan, dextrin, tara gum, and fenugreek gum; dimethyl diallyl chloride Ammonium/acrylamide copolymer, acrylamide/acrylic acid/dimethyldiallylammonium chloride copolymer, β-methacryloxyethyltrimethylammonium/acrylamide copolymer, vinylpyrrolidone/N,N-dimethylaminoethyl methacrylic acid copolymer, diethyl sulfate Cationized vinyl or acrylic polymers such as β-methacryloxyethyl trimethylammonium/acrylamide copolymer, polydimethylmethylene piperidinium chloride; N,N-dimethylaminoethyl methacrylate diethyl sulfate/N,N- Examples include polyglycol polyamine condensates such as dimethylacrylamide/polyethylene glycol dimethacrylate; dimethyl adipionate-aminohydroxypropyldiethyltriamine copolymers; aminoethylaminopropyl/methylpolysiloxane copolymers.

Among these, cationized cellulose, cationized guar gum, cationized polysaccharide, and dimethyldiallylammonium chloride/acrylamide copolymer are preferred from the viewpoint of moisturizing effect, and cationized cellulose is particularly preferred.

In a preferred embodiment of the present invention, the cationized cellulose is a reaction product of trimethylammonium-substituted epoxide and/or 3-chloro-2hydroxypropyltrimethylammonium and hydroxyethylcellulose, It is called O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride.

From the viewpoint of moisturizing effect, the content of component (A) is preferably 0.01 to 20 parts by mass, more preferably 0.05 to 10 parts by mass, per 100 parts by mass of the bath additive composition of the present invention. The amount is more preferably 0.1 to 5 parts by mass.

(B) Dye (B) Dye is not particularly limited, but examples include dyes having anionic groups such as sulfonic acid groups and carboxylic acid groups, particularly Blue No. 1, Blue No. 2, and Red No. 2. , Red No. 40, Red No. 102, Red No. 106, Red No. 227, Red No. 230 (1), Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Green No. 3, Green No. 201, Green No. 204 , Orange No. 205, and other legal dyes.

The content of component (B) is preferably 0.001 to 0.5 parts by mass, more preferably 0.005 to 0.5 parts by mass, per 100 parts by mass of the bath additive composition of the present invention, from the viewpoint of coloring the bath salts. The amount is 0.4 parts by mass, more preferably 0.01 to 0.3 parts by mass.

(C) Surfactant In the present invention, the surfactant is selected from the group consisting of anionic surfactants and nonionic surfactants having an HLB of 10 to 18.
Examples of anionic surfactants include fatty acid salts such as sodium laurate and triethanolamine laurate; alkyl sulfate salts such as sodium lauryl sulfate and triethanolamine lauryl sulfate; alkyl sulfates such as polyoxyethylene sodium lauryl sulfate; Ether sulfate salts; N-acylamino acid salts such as sodium lauroylalanine, potassium lauroylalanine, triethanolamine lauroylalanine, sodium cocoylalanine, sodium lauroyl aspartate, potassium lauroyl aspartate, sodium cocoyl glutamate, sodium lauroyl glutamate; lauroyl sarcosine N-acyl sarcosine salts such as sodium, potassium lauroyl sarcosine, triethanolamine lauroyl sarcosine, sodium stearyl sarcosine; N-acyl methyl taurine salts such as sodium stearyl methyl taurate, sodium coconut oil fatty acid methyl taurate; sodium monostearyl phosphate, poly Phosphate ester salts such as sodium oxyethylene lauryl ether phosphate and sodium polyoxyethylene stearyl ether phosphate; Sulfosuccinates such as disodium lauryl sulfosuccinate and disodium lauryl polyoxyethylene sulfosuccinate; Sodium dodecylbenzene sulfonate, dodecyl Examples include alkylbenzenesulfonic acid salts such as benzenesulfonic acid triethanolamine salt.

Examples of the nonionic surfactant include those having an HLB of 10 to 18, preferably 12 to 15, such as polyoxyethylene octylphenyl ether.

Particularly preferred surfactants are anionic surfactants having a carboxyl group and nonionic surfactants having an HLB of 12 to 15. Specific examples include sodium lauroylalanine, potassium lauroylalanine, triethanolamine lauroylalanine, cocoyl N-acyl amino acid salts such as sodium alanine, sodium lauroyl aspartate, potassium lauroyl aspartate, sodium cocoyl glutamate, sodium lauroyl glutamate; N-acyl sarcosine salts such as sodium lauroyl sarcosine, potassium lauroyl sarcosine, triethanolamine lauroyl sarcosine; Oxyethylene octylphenyl ether is mentioned.

The content of component (C) is preferably 0.01 to 20 parts by mass, more preferably 0.05 to 20 parts by mass, per 100 parts by mass of the bath additive composition of the present invention, from the viewpoint of suppressing water-insoluble substances. The amount is 10 parts by weight, more preferably 0.1 to 5 parts by weight.

In one embodiment, the mass ratio of the cationic polymer (A) to the dye (B) to the surfactant (C) is 1:(0.001-1):(0.1-100). Preferably, the ratio is 1:(0.005 to 0.5):(0.5 to 10).

(D) Other components The bath additive composition of the present invention may appropriately contain components normally used in bath additives. As such components, for example, carbonates and organic acids may be blended.

Examples of the carbonate include one or two selected from sodium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium hydrogen carbonate, sodium sesquicarbonate, ammonium sesquicarbonate, ammonium carbonate, magnesium carbonate, calcium carbonate, and potassium carbonate. There are more than one species. Among them, one or more selected from sodium carbonate and sodium bicarbonate are preferred from the viewpoint of imparting better foaming properties, and from the viewpoint of providing good skin feel and storage stability, carbonic acid It is more preferable to use sodium and sodium bicarbonate in combination.

When blending a carbonate, the blending amount is preferably 20 to 99.79 parts by mass, preferably 40 to 98 parts by mass, per 100 parts by mass of the bath agent composition of the present invention.

Examples of the organic acid include 1 selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyrrolidonecarboxylic acid, salicylic acid, maleic acid, phthalic acid, glutaric acid, and oxalic acid. A species or two or more species may be mentioned. Among them, from the viewpoint of ensuring storage stability, one or more selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, pyrrolidone carboxylic acid, and salicylic acid are preferable. More preferred is one or more selected from succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, and citric acid.

When an organic acid is blended, its content is from the same amount to 1000 times the blended amount (parts by mass) of the cationic polymer.

Other ingredients that can be incorporated into the bath additive composition of the present invention include, but are not particularly limited to, potassium chloride, sodium chloride, sodium sulfate, magnesium sulfate, potassium nitrate, sodium nitrate, sodium polyphosphate, ammonium chloride, iron sulfate. , sodium phosphate, sodium thiosulfate, aluminum sulfate, sodium hyposulfite, calcium nitrate, calcium hydrogen phosphate, sulfur, sodium sulfide, potassium sulfide, iron sulfite, silicic anhydride, metasilicic acid, mica powder, neutral clay, Inorganic salts such as borax, boric acid, calcium oxide, potassium bromide, potassium permanganate, artificial callus salts, mineral springs, mineral sand, and yunohana; titanium oxide, talc, red iron oxide, yellow iron oxide, magnesium silicate, mica, Pigments such as mica, titanium, titanium dioxide, anhydrous silicic acid, and zinc oxide; Organic acid salts such as trisodium citrate; Water-soluble polymers such as polyethylene glycol, polypropylene glycol, and polyoxyethylene phenol ether; Chondroitin sulfate and hyaluronic acid Mucopolysaccharides such as acids; Alcohols such as ethanol, stearyl alcohol, isopropyl alcohol, cetyl alcohol, hexadecyl alcohol; Excipients such as calcium silicate and glucose; Medicinal ingredients such as crude drugs; Moisturizing ingredients including oily ingredients; Fragrances etc.

There is no particular restriction on the dosage form (form) of the bath salt composition of the present invention, and it can be in various forms such as solid preparations such as briquettes, tablets, and powders, and liquid preparations, but preferably briquettes, tablets, powders, etc. It is a solid drug.

In one embodiment, the bath agent composition of the present invention is preferably formulated such that the concentration of the cationic polymer in the bath water is 0.01 to 100 ppm, more preferably 0.1 to 10 ppm. . For example, when the bath additive composition of the present invention is in the form of briquettes or powder, which is administered in an amount of 45g per 200 liters of bath water, the content of the cationic polymer in the briquettes or powder is 0.004~ It is convenient to mix it so that it is 44.4% by weight, more preferably 0.04 to 4.44% by weight.

The present invention will be explained in more detail below based on Examples, but the present invention is not limited thereto. Unless otherwise specified, amounts are expressed in % by mass.

Examples 1 to 12 and Comparative Examples 1 to 4
Various bath additive compositions were prepared and solubility tests were conducted.
2,000 g of ion-exchanged water was placed in a separable flask and heated to 40°C. To this was added a mixture of components in the amounts shown in Table 1 so that the cationic polymer concentration in hot water was 50 ppm, and the mixture was stirred for 30 minutes to prepare an aqueous solution, and the filtration residue was evaluated.
The method for evaluating filtration residue is shown below.

(filtration residue, %)
The aqueous solution was filtered using a membrane filter with a filtration efficiency of 2 μm and 98% to collect a filtration residue. The filtration residue was observed with a stereomicroscope (OLYMPUS SZX10), and the area percentage of the residue occupying the filter was calculated by image analysis using WINROOF software (detecting each color). The results are shown in Table 1.

Note that if the filtration residue is less than 20%, deposits on the bathtub cannot be easily visually confirmed during actual use, and no problem will occur during actual use.

As is clear from the results shown in Table 1, when a certain surfactant is added to a bath additive composition containing a cationic polymer and pigments, the formation of water-insoluble substances is suppressed to a level that does not cause problems during actual use. be able to.

Examples 13 to 22 and Comparative Examples 5 to 9
A powdered bath additive was prepared by uniformly mixing the ingredients in the amounts shown in Table 2 below.
Next, 200 L of hot water (40° C.) was placed in a bathtub measuring 105 cm (length) x 57 cm (width) x 48 cm (height), and 45 g of the test sample bath additive was added and stirred for 30 seconds. Thereafter, the bathtub was allowed to stand for 60 minutes, and after draining the bath water, it was confirmed by visual inspection based on the following evaluation criteria whether water-insoluble substances were generated at the bottom of the bathtub.
Insoluble matter generation evaluation criteria
◎: Almost no amount of generation observed ○: Little amount of generation ×: Large amount of generation

Furthermore, the presence or absence of a moisturizing feeling after bathing was also evaluated by a panel consisting of three panelists. The moisturizing feeling after bathing was evaluated by placing the forearm in the bathtub for 10 minutes, towel drying, waiting in a room at 25°C and 50% humidity for 30 minutes, and then evaluating the feel of the inside of the forearm based on the following evaluation criteria. went.
Feel evaluation criteria
◎: Moisturizing feeling ×: No moisturizing feeling Table 2 summarizes the results.

From the results shown in Table 2, it is clear that if a cationic polymer is not added to the bath additive, a moisturizing feeling after bathing cannot be obtained (see Comparative Example 9). It can be seen that insoluble matter remains (see Comparative Examples 5 to 8). On the other hand, it can be seen that when a certain surfactant is added to a bath additive containing a cationic polymer and pigments, it is possible to significantly suppress the formation of insoluble substances that remain in the bathtub while providing a moisturizing feeling after bathing ( (See Examples 13-22).

Examples 23 to 25 and Comparative Examples 10 and 11
The ingredients in the amounts shown in Table 3 below were mixed uniformly to obtain a powdery mixture. This powdery mixture was pressed into 45 g tablets of about φ50×thickness 15 mm using a single-shot tablet machine. This was stored in a storage at 70°C for 10 days and used as a test sample.
Next, in a bathroom in a closed space of 3.74 m ³ (1.6 m (length) x 1.2 m (width) x 1.95 m (height)), 200 L of hot water (40°C) was poured into the bathtub. One tablet (45 g) of the test specimen (tablet bath additive) described above was placed. After dissolution, the bath water was left to stand for 120 minutes and the bath water was drained, and it was confirmed by visual inspection based on the following evaluation criteria whether water-insoluble substances were generated at the bottom of the bathtub.
Insoluble matter generation evaluation criteria
◎: Almost no amount of generation is observed. ○: The amount of generation is small. ×: The amount of generation is large. The results are summarized in Table 3.

As shown in Table 3, when stored under harsh conditions (70° C. for 10 days), the test specimen of Comparative Example 11 had a large amount of insoluble matter remaining in the bathtub. On the other hand, it can be seen that in Examples 23 to 25, in which the cationic polymer and pigments were blended with a certain surfactant, the formation of insoluble matter remaining in the bathtub could be suppressed even after storage under harsh conditions.

Claims (10)

The following ingredients (A), (B) and (C):
(A) Cationic polymer (B) Pigment (C) From the group consisting of N-acyl (8 to 18 carbon atoms) amino acid salt, N-acyl (8 to 18 carbon atoms) sarcosine salt, and polyoxyethylene octylphenyl ether A solid bath additive composition comprising a selected surfactant. The solid bath additive composition according to claim 1 , comprising 0.01 to 20 parts by mass of a surfactant per 100 parts by mass of the bath additive composition. The solid bath additive composition according to claim 1 or 2 , wherein the dye is a dye having an anionic group. The solid bath additive composition according to any one of claims 1 to 3 , wherein the cationic polymer is cationized cellulose. The solid bath additive composition according to any one of claims 1 to 4 , wherein the mass ratio of the cationic polymer to the surfactant is 1:0.1 to 1:100. Any one of claims 1 to 5, wherein the surfactant is selected from N-acyl (8 to 18 carbon atoms) amino acid salts and N-acyl (8 to 18 carbon atoms) sarcosine salts . solid bath additive composition. The solid bath additive composition according to any one of claims 1 to 5 , wherein the surfactant is polyoxyethylene octylphenyl ether. Per 100 parts by mass of the bath agent composition, (A) the content of the cationic polymer is 0.01 to 20 parts by mass, (B) the content of the pigment is 0.001 to 0.5 parts by mass, and ( C) The solid bath additive composition according to any one of claims 1 to 7 , wherein the amount of surfactant is 0.01 to 20 parts by mass. The solid bath additive composition according to any one of claims 1 to 8 , further comprising a carbonate in an amount of 20 to 99.79 parts by mass per 100 parts by mass of the bath additive composition. The solid bath additive composition according to any one of claims 1 to 9 , having a shape selected from briquettes, tablets, and powders.