JP3404916B2 - Solid detergent composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid detergent composition, and more specifically, it has low solid irritation to the skin, excellent foaming properties, and has excellent solid physical properties such that it is hard to be wiped with water and does not easily dissolve. , A solid detergent composition obtained at low cost.

[0002]

2. Description of the Related Art Soap, which is an alkali metal salt of higher fatty acid, has been generally used as a solid detergent, but soap is unlikely to foam in hard water, and the aqueous soap solution has a pH of 10 to 10 due to hydrolysis. It has an alkalinity of 11, and has problems such as causing dryness of the skin.

For this reason, soaps may be combined with synthetic surfactants such as anionic surfactants close to neutrality such as sodium lauryl sulfate and weakly acidic surfactants such as sodium N-acylglutamate, and soap. For the purpose of reducing the influence of free alkali contained in soap, a solid detergent is formed by combining a fatty acid triethanolamine salt and soap (Fragrance Journal, Vol. 47, p. 47). , 1981). Furthermore, it has been proposed to add a salt of a sulfosuccinic acid alkyl ester or its ethylene oxide adduct to a soap base to form a mild detergent composition (Japanese Patent Laid-Open No. 2-155991).

However, in the case of the above-mentioned soap-based solid detergent, the pH of the aqueous soap solution is about 8 to 10, which is also insufficient in terms of skin irritation.

Therefore, conventionally, it has been desired to develop an inexpensive solid detergent which does not use soap as a base and has good solid physical properties and low skin irritation.

[0006]

By the way, polyoxyethylene alkyl ether sulphate (hereinafter abbreviated as ES) used as a base for shampoo and dishwashing has excellent foaming power, detergency and It has excellent properties of showing hard water resistance, being less irritating to the skin, and being inexpensive. So, such an E
It is conceivable to use S as a base for solid detergents.

However, since ES is industrially supplied as an aqueous solution of about 20 to 70%, it is considered unsuitable as a base for a solid detergent.
Therefore, at present, there has been almost no attempt to use it for a so-called mechanical kneading solid detergent.

The present invention is intended to solve the problems of the prior art as described above, and is inexpensive and hypoallergenic.
An object of the present invention is to provide a solid detergent composition which is based on ES having excellent properties such as high foaming property and has excellent solid physical properties.

[0009]

The present inventors have completed the present invention by finding that the above-mentioned object can be achieved by using a specific phosphoric acid ester type surfactant having a low irritation as a solidifying agent. Came to let.

That is, the present invention provides the following components (A) and (B), (A) 10 to 40% by weight of polyoxyethylene alkyl ether sulfate represented by the formula (1).

[0011]

[Chemical 4] (In the formula, R ¹ is a saturated or unsaturated hydrocarbon group having 8 to 20 carbon atoms, a is a number of 1 to 10, M is an alkali metal, magnesium, ammonium or an aliphatic alkanol ammonium, n is the valence of M.),
(B) Phosphate ester-based surfactant represented by formula (2) or (3): 1 to 60% by weight

[0012]

[Chemical 5] (In the formula, R ² , R ³ and R ⁴ independently have 16 to 2 carbon atoms.
2 is a saturated or unsaturated hydrocarbon group, X and Y are independently a hydrogen atom, an alkali metal, ammonium or an aliphatic alkanol ammonium, and b, c and d are independently a number of 0 to 10. is there. ) Is contained, The solid detergent composition characterized by the above-mentioned is contained.

The present invention will be described in detail below.

In the present invention, ES (polyoxyethylene alkyl ether sulfate) of the formula (1) is used. This compound is a synthetic surfactant which has a surface activity in the weakly acidic to neutral region and is a mild agent. Therefore,
When this composition is used to form a solid detergent composition, the solid detergent composition can be imparted with favorable mildness.

In ES of the formula (1), R ¹ is a saturated or unsaturated hydrocarbon group, but when the number of carbon atoms is less than 8, it becomes difficult to obtain, and the detergency is lowered,
If it exceeds, it becomes difficult to obtain, and the foaming property decreases. Therefore, the carbon number of R ¹ is 8 to 20. As such a saturated or unsaturated hydrocarbon group having 8 to 20 carbon atoms, a linear or branched alkyl group or alkenyl group,
For example, an octyl group, an isooctyl group, a decyl group, a lauryl group, a myristyl group, a palmityl group, a stearyl group, an isostearyl group, an oleyl group and a docosyl group can be preferably exemplified, and among them, a carbon number of 11 to 13
Preferred examples thereof include saturated alkyl groups, particularly lauryl groups. Examples of the alkali metal of M include lithium, sodium, potassium and the like. Preferable examples of the aliphatic alkanolammonium of M include mono-, di- or trialkanolammonium having a hydroxyalkyl group having 2 to 3 carbon atoms such as a hydroxyethyl group and a hydroxypropyl group. Further, the preferable range of a is 2 to 5 when the balance between the two is considered, because if it is too small, the irritation increases, and if it is too large, the foaming property decreases.

As a particularly preferred embodiment of ES of formula (1) defined as above, polyoxyethylene (2)
Examples thereof include sodium lauryl ether sulfate, polyoxyethylene (3) sodium lauryl sulfate, polyoxyethylene (2) sodium myristyl sulfate, and polyoxyethylene (2-5) sodium magnesium lauryl sulfate.

The amount of ES of the formula (1) is 10 to 40% by weight, preferably 12 to 35% by weight, more preferably 15 to 30% by weight in the solid detergent composition. If the blending amount is less than 10% by weight, foaming tends to be insufficient, and if it exceeds 40% by weight, it tends to become fuzzy.

In the present invention, a commercially available 20 to 70% by weight aqueous solution can be used as the feedstock for ES, but 60 to 70% by weight is used in view of the productivity of the solid detergent composition.
It is preferable to use an aqueous solution.

The ES of formula (1) may be used alone or in combination of two or more.

In the present invention, E of the above-mentioned formula (1) is used.
In addition to S, the phosphoric acid ester-based surfactant of formula (2) or (3) is used. These phosphate ester surfactants have surface activity in the neutral region and are hypoallergenic,
Moreover, it is a compound that is easy to mold and has excellent solid physical properties, such as soap. Therefore, by using these phosphate ester-based surfactants together, it is possible to impart preferable solid physical properties and low irritation to the solid detergent composition.

In the phosphate ester type surfactant of formula (2) or (3), b, c and d are independently a number of 0 to 10, preferably 0 to 3 and particularly 0. It is preferable in terms of the balance between solid physical properties and foamability.

Further, R ² , R ³ and R ⁴ are saturated or unsaturated hydrocarbon groups, but if the carbon number is less than 16, the solid property becomes insufficient, and if it exceeds 22, foaming is insufficient. Becomes Therefore, the carbon number of R ² , R ³ and R ⁴ is 1
6 to 22. Examples of such a hydrocarbon group include an alkyl group such as a palmityl group, a heptadecyl group, a stearyl group, an oleyl group, a nonadecyl group, an aralkyl group, a heneicosyl group, and a behenyl group. X
Examples of the alkali metal of Y and Y include lithium, sodium and potassium. As the aliphatic alkanol ammonium, mono-, di- or trialkanol ammonium having a hydroxyalkyl group having 2 to 3 carbon atoms such as hydroxyethyl group and hydroxypropyl group can be preferably exemplified.

The phosphoric acid ester-based surfactant of the formula (2) or (3) as defined above may be added alone to the solid detergent composition of the present invention or used together. You may.

Specific examples of the compound of the formula (2) or (3) include mono- or di-palmityl phosphate ester, mono- or distearyl phosphate ester, mono- or di-aralkyl phosphate ester, mono- or dibehenyl phosphate ester, and their mono- or dialkali salts. A metal salt etc. can be illustrated. Among them, the sodium salt of mono- or distearyl phosphate can be preferably exemplified. In this case, when the weight ratio of the sodium salt of distearyl phosphate ester to the sodium salt of monostearyl phosphate ester exceeds 1, foaming of the solid detergent composition tends to be insufficient, so monostearyl phosphate ester The weight ratio of the sodium salt of distearyl phosphate to the sodium salt of distearyl phosphate is 100: 0.
It is preferably set to 50:50.

The amount of the phosphate ester type surfactant of the formula (2) or (3) is 1 to 60% by weight, preferably 10 to 50% by weight, more preferably 1% by weight in the solid detergent composition.
5 to 45% by weight. If the content is less than 1% by weight, the solid physical properties will be insufficient even when used in combination with other solidifying agents such as higher fatty acids, and if it exceeds 60% by weight, foaming will be insufficient.

As the phosphoric acid ester-based surfactant, as described above, the compound of the formula (2) or (3) may be blended alone, but may be used together. In that case, the compounding ratio of the formulas (2) and (3) is not particularly limited, but a commercially available product containing the compound of the formula (2) in an amount of about 70% by weight can be preferably used.

In addition to the phosphate ester type surfactant of the formula (2) or (3), R in the formula (2) or (3)
^At least one of ² , R ³ and R ⁴ has 8 to 14 carbon atoms
The saturated or unsaturated hydrocarbon group-substituted phosphate ester surfactant can be added within a range that does not reduce foaming. Thereby, good plasticity and tackiness can be imparted to the solid detergent composition.

The solid detergent composition of the present invention contains the above ES
In addition to the phosphate ester-based surfactants, nonionic surfactants such as paraffin, fatty acids, higher alcohols, long-chain alkyl sulphates, polyethylene glycols, beef tallow alcohol ethoxylates, etc. as solidifying agents within the range that does not impair the effects of the present invention. , Fatty acid soap, fatty acid ethanolamide, diethylene glycol monostearate, hard beef tallow, Na ₂ SO ₄ , AlK (SO ₄ ) ₂ , CaHPO
₄ , inorganic salts such as MgO and Na ₂ CO ₃ , inorganic powders such as talc and kaolin, sugars such as starch, dextrin, mannitol and glucose, 12-hydroxystearic acid, dibenzylidene sorbitol, palmitic acid of dextrin, stearic acid And higher fatty acid esters, dialkyl phosphate polyvalent metal salts such as aluminum dicetyl phosphate, lauroyl glutamic acid dibutyl amide, aluminum stearate, and metal soaps such as magnesium stearate. Above all, as a solidifying agent, a higher fatty acid represented by the formula (4)

[0029]

[Chemical 6] (In the formula, R ⁵ is a saturated or unsaturated hydrocarbon group having 8 to 22 carbon atoms, M is a hydrogen atom, an alkali metal, magnesium, ammonium or an aliphatic alkanol ammonium, and n is a valence of M. It is preferable to add a). In this case, if the degree of neutralization is too high, irritation increases, so it is preferable to use a higher fatty acid having a degree of neutralization of 50% or less. By adding the higher fatty acid of formula (4),
The solid property can be improved, and further, the operation can be facilitated at the time of kneading or die cutting, and the productivity can be improved.

In the higher fatty acid of the formula (4), R ⁵ is
Saturated or unsaturated hydrocarbon group having 8 carbon atoms
If it is less than 22, the solid physical properties will be insufficient, and if it exceeds 22, the foamability will be insufficient. Therefore, the carbon number of R ⁵ is 8 to 2
Set to 2. Examples of such a hydrocarbon group include alkyl groups such as octyl group, nonyl group, undecyl group, tridecyl group, pentadecyl, heptadecyl group, 9-heptadecenyl group, nonadecyl group, henicosyl group. The alkali metal of M is lithium, sodium, potassium or the like, and sodium is particularly preferable.

Specific examples of the higher fatty acid of the formula (4) include:
Fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid and behenic acid, and their neutralized products, animal fats and oils such as beef tallow and sheep fat, or coconut oil, palm oil, palm kernel oil, soybean oil, olive oil Preferable examples are fatty acids derived from vegetable oils and fats such as cottonseed oil or a mixture thereof, or neutralized products thereof.

The amount of the higher fatty acid represented by the formula (4) is not more than 50% by weight, preferably 10 to 40, in the solid detergent composition.
%, More preferably 15 to 35% by weight. If the blending amount exceeds 50% by weight, foaming becomes insufficient.

Further, the solid detergent composition of the present invention further contains 20% by weight or less, preferably 5% by weight or less of an oil agent such as fats and oils, waxes or their derivatives in order to improve the feel during use. It is preferable to contain -15% by weight. Such oils, cottonseed oil, soybean oil, vegetable oils such as olive oil, egg yolk oil, animal oils such as mink oil, cacao butter, oils and fats such as vegetable oils such as coconut oil, or derivatives thereof,
Hydrocarbons such as liquid paraffin, squalane, and petrolatum, neopentyl glycol dicaprate, diisostearyl malate, dipentaerythritol fatty acid ester, esterified oils such as myristate diglyceride can be preferably exemplified.

When the oil agent is added to the solid detergent composition, it is more preferable to add 10% by weight or less, preferably 2 to 8% by weight, of the oil agent which is liquid at room temperature. Thereby, the tactile sensation during use can be further improved. Here, the oil which is liquid at room temperature means a liquid which is liquid at a working environment temperature of a normal solid detergent composition, about 20 to 35 ° C., and preferably vegetable oil such as cottonseed oil, soybean oil and avocado oil. It can be illustrated.

When the oil agent which is liquid at room temperature is blended in this way, in order to prevent the deterioration of the solid physical properties of the solid detergent composition, the moisture contained in ES of the component (A) is added to the solid detergent composition. In order to keep the solid detergent composition from being released therein, the solid absorbent composition of the present invention may further contain 20% by weight or less, and preferably 5 to 15% by weight of liquid absorbing powder. Preferred examples of such liquid-absorbent powder include silica, calcium silicate, and magnesium aluminum silicate.

The solid detergent composition of the present invention may contain various additives used in ordinary detergent compositions in addition to the above-mentioned components, and a co-activator such as acylglyceryl sulfate, Acyl isethionate, alkyl sulfate, alkyl glyceryl ether sulfate, alkyl sulfosuccinate, alkyl phosphate ester, alkyl glucoside, polyoxyethylene ether acetate, polyoxyethylene acylamide ether acetate, N-acyl-β-alanilate, Anionic surfactants such as N-acyl sarcosinate, acylmethyl taurate, α-sulfo fatty acid ester, N-acyl glutamate, amphoteric surfactants such as imidazoline-based amphoteric surfactants and betaine-based amphoteric surfactants, Semi-polarity such as amine oxides Nonionic surfactants such as surfactants, ethoxylated fatty alcohols, fatty acid alkanolamides, pluronic type surfactants and the like can be added. Further, a texture-improving agent, for example, cationized polymer such as cationized cellulose, cationized guar gum, chitin chitosan derivative, cellulose derivative such as hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, polyethylene oxide, polyethylene glycol, polypropylene glycol, carrageenan. Polymer compounds such as guar gum, xanthan gum and polyvinyl alcohol can also be blended.
In addition, moisturizers such as liquid water-soluble polyols, glycerin, propylene glycol, sorbitol, methyl glucose ethoxylated / propoxylated ethers, lanolin alcohol ethoxylated / propoxylated ethers, natural in the stratum corneum of the skin. Compounds (eg sodium pyrrolidonecarboxylate, lactic acid, etc.), hydrolyzed proteins, collagen-derived proteins, aloe vera gel,
Acetamide monoethanolamide, silicone derivative and the like; bactericides such as hexachlorophene, 3,4,4
′ -Trichlorocarbanide, 3,4 ′, 5-tribromosalicylanilide, 3-trifluoromethyl-4,4 ′
-Dichlorocarbanilide, tetramethylthiuram disufide, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, etc .; anti-inflammatory agent, such as chamomile extract, allantoin, guaiazulene, glycyrrhizinic acid, methyl salicylate, etc .; antioxidant Agents such as ethylenediaminetetraacetic acid and dibutylhydroxytoluene can be added. In addition, if necessary,
Additives such as water, fragrances, dyes, and ultraviolet absorbers can be appropriately added.

The total content of the various additives is preferably 20% by weight or less in the solid detergent composition of the present invention.

The solid detergent composition of the present invention can be prepared and molded, for example, according to the method described below.

First, the component (A) ES, the component (B) phosphate ester surfactant, and other components to be added as necessary are heated in a kneader and uniformly mixed. Then, the mixture is taken out from the kneader and cooled to room temperature with a chilling roll or the like. After blending a fragrance, a colorant and the like, the mixture is kneaded with a soap plodder, extruded from the cone portion, and then molded with a stamping machine to obtain a molded product of the solid detergent composition of the present invention.

[0040]

The solid detergent composition of the present invention comprises a specific ES,
It is composed of a specific phosphate ester type surfactant. Therefore, it is possible to simultaneously realize excellent foamability, an excellent solid physical property that does not require a drying step at the time of production, is hard to be spilled in water, and is hard to dissolve and collapse, and is low in irritation.

[0041]

EXAMPLES The present invention will be specifically described below with reference to examples.

Examples 1 and 2 and Comparative Examples 1 and 2 Solid detergent compositions having the compositions shown in Table 1 were prepared by the following method.

(Preparation method) After stirring and mixing the respective components in a kneader, the components were taken out from the kneader and cooled to room temperature with a chilling roll. This was kneaded twice with a soap plodder, then extruded from the cone portion and stamped to obtain a molded product of the solid detergent composition.

The molded article of the obtained solid detergent composition was tested and evaluated for "foginess" and "foamability" by the following methods.

Softness Test The stamped solid detergent composition was placed in a soap case and immersed in water at 25 ° C. for 1 hour so that half of it was immersed in water. Take this out, 100% R with immersion surface up
It was left in a H desiccator for 24 hours. Then, the solid detergent composition was taken out from the desiccator, and the state of dissolution of the solid detergent composition was visually evaluated according to the following evaluation criteria.

Evaluation Criteria for [Foginess] Rank State 5: When the melt did not melt at all 4: When the melt melted slightly 3: When melted slightly 2: When melted considerably 1: When melted very much Foaming test The hands were washed with the stamped solid detergent composition, and the foaming at that time was visually evaluated according to the following evaluation criteria.

Evaluation Standard of [Foamability] Rank State 5: Very foaming 4: Very foaming 3: Some foaming 2: Slight foaming 1: No foaming at all

[0048]

[Table 1] Amount (wt%) Component Name Example Comparative Example 1 2 1 2 polyoxyethylene (2) sodium lauryl ether sulfate * 1 40 40 60 40 monostearyl sodium phosphate 60 40 40 - Stearic acid * 2 - 20 - 60 Total 100 100 100 100 Evaluation item (evaluation result) Smearing degree 4 4 1 4 Foaming property 5 4 5 2 * 1: Emal E-70C (65-70% aqueous solution), manufactured by Kao Co., Ltd. * 2: Purified stearic acid # 550, manufactured by Kao Co., Ltd. As is clear from the results shown in Table 1, solid washing of Examples Since the agent composition was composed only of hypoallergenic ingredients, it was hypoallergenic as a whole, and it was difficult to swell and had excellent foaming. On the other hand, the solid detergent composition of Comparative Example 1 had an excessive amount of ES, and thus was easily fusible. Moreover, since the solid detergent composition of Comparative Example 2 used only higher fatty acids as the solidifying agent, foaming was insufficient.

Example 3 A solid detergent composition having the composition shown in Table 2 below was prepared as in Example 1.
It was prepared by the same operation.

[0050]

[Table 2] Ingredient name Blend amount (wt%) Polyoxyethylene (2) Sodium lauryl ether sulfate * 1 36 Sodium monostearyl phosphate 20 Triple press stearic acid * 3 15 Sodium cocoylisethionate * 4 15 Palm oil fatty acid sodium 12.5 Perfume 1 Pigment 0.5 Total 100 * 3: Edenoa L2SM, manufactured by Henkel Hakusui Co., Ltd. * 4: TAURANOL I-78, manufactured by Finetex Co. The obtained solid detergent composition was the same as the solid detergent composition of Example 1. It also showed excellent mildness, solidity and foamability.

Example 4 A solid detergent composition having the composition shown in Table 3 below was prepared as in Example 1.
It was prepared by the same operation.

[0052]

[Table 3] Ingredient name Blending amount (% by weight) Polyoxyethylene (2) Sodium lauryl ether sulfate * 1 30 Sodium stearyl phosphate 20 Triple press stearic acid * 3 20 Sodium cocoyl isethionate * 4 10 Coconut oil fatty acid monoethanolamide * 5 3 Cottonseed oil 3 Palm oil fatty acid sodium 12.5 Fragrance 1 Pigment 0.5 Total 100 * 5: Amizole CME, manufactured by Kawaken Fine Chemical Co., Ltd. The obtained solid detergent composition was the same as the solid detergent composition of Example 1. It also showed excellent mildness, solidity and foamability.

Example 5 A solid detergent composition having the composition shown in Table 4 below was prepared as in Example 1.
It was prepared by the same operation.

[0054]

[Table 4] Ingredient name Blending amount (% by weight) Polyoxyethylene (2) Sodium lauryl ether sulfate * 1 35 Sodium monostearyl phosphate 20 Stearic acid * 2 15 Beef tallow fatty acid * 6 5 Sodium lauryl sulfate * 7 10 Palm oil fatty acid monoethanolamide * 5 3 Soybean oil 5 Ultrafine silica * 8 5.5 Perfume 1 Pigment 0.5 Total 100 * 6: LUNAC TH, manufactured by Kao Corporation * 7: Emal 10 powder, manufactured by Kao Corporation * 8: Nipseal VN3, The obtained solid detergent composition manufactured by Nippon Silica Industry Co., Ltd. showed the same excellent hypoallergenicity, solidity and foamability as the solid detergent composition of Example 1.

Example 6 A solid detergent composition having the composition shown in Table 5 below was prepared as in Example 1.
It was prepared by the same operation.

[0056]

[Table 5] Ingredient name Blending amount (wt%) Polyoxyethylene (2) Sodium lauryl ether sulfate * 1 33 Sodium monostearyl phosphate 15 Triple press stearic acid * 3 14 Sodium cocoyl isethionate * 4 10 Coconut oil fatty acid amidoployl human doxysulfobetaine * 9 2 Coconut oil fatty acid monoethanolamide * 5 4 Cottonseed oil 5 Ultrafine silica * 8 5.5 Dextrin * 10 10 Perfume 1 Pigment 0.5 Total 100 * 9: REWOTERIC AM CAS U, WITCO Corp. * 10: The solid detergent composition obtained from NADEX 360, NATIONAL STARCH, Inc. exhibited the same excellent low irritation, solid physical properties, and foamability as the solid detergent composition of Example 1.

Example 7 A solid detergent composition having the composition shown in Table 6 below was prepared as in Example 1.
It was prepared by the same operation.

[0058]

[Table 6] Ingredient name Blending amount (wt%) Polyoxyethylene (3) alkyl (C12-15) Sodium ether ether * 11 33 Sodium monoaralkyl phosphate 13 Stearic acid * 2 8 Coconut oil fatty acid * 12 5 Sodium lauroyl isethionate 10 Oxyethylene coconut oil fatty acid sodium amide ether acetate * 13 3 Coconut oil fatty acid monoethanolamide * 5 3 Cottonseed oil 8 Ultrafine silica * 8 7.5 Dextrin * 10 8 Perfume 1 Pigment 0.5 Total 100 * 11: Standapol ES- 40, manufactured by Henkel Co., Ltd. * 12: Lunack L55, manufactured by Kao Co., Ltd. * 13: AKYPO SOFT KA250BVC, manufactured by CHEM-Y The obtained solid detergent composition was the same as the solid detergent composition of Example 1. It also showed excellent mildness, solidity and foamability.

Example 8 A solid detergent composition having the composition shown in Table 7 below was prepared as in Example 1.
It was prepared by the same operation.

[0060]

[Table 7] Ingredient name Blending amount (% by weight) Polyoxyethylene (2) sodium lauryl ether sulfate * 1 25 Polyoxyethylene (2) magnesium lauryl ether sulfate * 14 5 Sodium stearyl phosphate 10 Stearic acid * 2 10 Sodium stearate * 157 Sodium cocoyl isethionate * 4 10 Polyoxyethylene polyoxyprophylene glycol * 16 5 Coconut oil fatty acid monoethanolamide * 5 3 Sodium lauryl sulfate * 7 2.5 Cocoa butter 5 Sodium cetostearyl sulfate * 17 8 Dextrin * 10 8 Perfume 1 Pigment 0.5 Total 100 * 14: Texapon MG, manufactured by Henkel Co., Ltd. * 15: (Neutralized product of * 3) * 16: ADEKA Pluronic F68, manufactured by Asahi Denka Co., Ltd. * 17: Lanette E, Henkel The solid detergent composition obtained by It showed the same excellent mildness, solid physical properties and foamability as the solid detergent composition of Example 1.

[0061]

EFFECTS OF THE INVENTION The solid detergent composition of the present invention has a low physical irritancy to the skin, excellent foaming property, and does not cause water smearing or dissolution collapse even though it is based on ES. Is excellent.

Continuation of front page (56) Reference JP-A-3-66609 (JP, A) JP-A-4-103522 (JP, A) JP-A-4-217911 (JP, A) JP-A-2-175799 (JP , A) JP-A-3-277699 (JP, A) JP-A-7-138592 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C11D 1/94 A61K 7/50 C11D 1/04 C11D 1/29 C11D 1/34

Claims (6)

(57) [Claims] 1. The following components (A) and (B), (A) 10 to 40% by weight of polyoxyethylene alkyl ether sulfate represented by the formula (1): (In the formula, R ¹ is a saturated or unsaturated hydrocarbon group having 8 to 20 carbon atoms, a is a number of 1 to 10, M is an alkali metal, magnesium, ammonium or an aliphatic alkanol ammonium, n is the valence of M.),
(B) 1 to 60% by weight of a phosphoric acid ester-based surfactant represented by the formula (2) or (3) (In the formula, R ² , R ³ and R ⁴ independently have 16 to 2 carbon atoms.
2 are saturated or unsaturated hydrocarbon groups, X and Y are independently a hydrogen atom, an alkali metal, ammonium or an aliphatic alkanol ammonium, and b, c and d are independently a number of 0-10. is there. ) Is contained, The solid detergent composition characterized by the above-mentioned. 2. Further, the following components (C) and (C) are 50% by weight or less of a higher fatty acid represented by the formula (4): (In the formula, R ⁵ is a saturated or unsaturated hydrocarbon group having 8 to 22 carbon atoms, M is a hydrogen atom, an alkali metal, magnesium, ammonium or an aliphatic alkanol ammonium, and n is a valence of M. 1) is included.
The solid detergent composition described. 3. The solid detergent composition according to claim 1 or 2, further containing 20% by weight or less of an oil agent. 4. The solid detergent composition according to claim 3, which contains 10% by weight or less of an oil agent which is liquid at room temperature. 5. The solid detergent composition according to claim 4, further containing 20% by weight or less of a liquid-absorbent powder. 6. A polyoxyethylene alkyl ether sulfate feed material represented by formula (1) is
The solid detergent composition according to any one of claims 1 to 5, which is an aqueous solution of 70% by weight to 70% by weight.