JPH0797595A - Solid detergent composition - Google Patents

Abstract

(57) [Summary] [Structure] The following components (A) and (B); (A) The following general formula (1): (In the formula, R ¹ represents a hydrocarbon group having 16 to 22 carbon atoms) or a salt thereof, 10 to 50% by weight, (B) isethionic acid having a hydrocarbon group having 9 to 17 carbon atoms A solid detergent composition containing 10 to 50% by weight of a surfactant. [Effect] It is hypoallergenic to the skin, exhibits rich foaming, and does not cause swelling or melt-down.

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 particularly to a solid detergent composition which is mild to skin, excellent in foaming and has good solid physical properties.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Soap (alkaline metal salt of higher fatty acid) is generally used as a solid detergent, but soap hardly foams in hard water.
It has the drawback of showing alkalinity due to hydrolysis. On the other hand, it is known that a nearly neutral anionic surfactant such as sodium lauryl sulfate and a weakly acidic surfactant such as sodium N-acylglutamate are used alone or in combination with soap. Further, a detergent using a fatty acid triethanolamine salt as a base for the purpose of reducing the influence of free alkali contained in soap is also known (Fragrance Journal, Vol. 47, p. 47, 198).
1 year). More recently, it has been shown that a mild detergent can be obtained by adding a salt of a sulfosuccinic acid alkyl ester or its ethylene oxide adduct to a soap base (JP-A-2-155991).

However, these conventional solid detergents, when combined with soap, do not yet achieve satisfactory hypoallergenicity because of the high pH of 8 to 10, and the synthetic surface active agents. When the agent was used alone, it had a drawback that it was more likely to dissolve and collapse than ordinary soap and the strength during molding was insufficient.

Therefore, it has been desired to develop a solid detergent composition which is low in irritation and excellent in foaming and has excellent solid physical properties.

[0005]

Means for Solving the Problems As a result of intensive investigations in view of such circumstances, the present inventors have found that a phosphate ester having a hydrocarbon group having 16 to 22 carbon atoms and a specific isethionate-based surfactant are contained. The present inventors have found that the solid detergent composition which does not cause irritation to the skin, exhibits excellent foaming, and does not cause swelling or melt-down, and has completed the present invention.

That is, the present invention provides the following components (A) and (B); (A) the following general formula (1)

[0007]

[Chemical 3]

(In the formula, R ¹ represents a saturated or unsaturated hydrocarbon group having 16 to 22 carbon atoms, and X and Y each represent a hydrogen atom, an alkali metal, ammonium or a hydroxyalkyl group having 2 to 3 carbon atoms. An alkanolamine having n, and n is a number of 0 to 10) 10 to 50% by weight of a phosphoric acid ester or salt thereof represented by the following general formula (2)

[0009]

[Chemical 4]

(In the formula, R ² represents a saturated or unsaturated hydrocarbon group having 9 to 17 carbon atoms, Z represents a hydrogen atom, an alkali metal, ammonium or an alkanolamine having a hydroxyalkyl group having 2 to 3 carbon atoms. The solid detergent composition is characterized by containing 10 to 50% by weight of an isethionate-based surfactant represented by

The phosphoric acid ester of component (A) or a salt thereof used in the present invention is preferably n = 0 to 3 in the general formula (1), and particularly preferably n = 0. Examples of R ¹ include alkyl groups such as palmityl, heptadecyl, stearyl, nonadecyl, aralkyl, heneicosyl, and behenyl. Of these, the monosodium salt of stearyl phosphate is particularly preferable. Among X and Y, the alkali metal includes, for example, lithium, sodium, potassium and the like; and the alkanolamine includes, for example, triethanolamine, diethanolamine, monoethanolamine and the like.

The compounding amount of the component (A) in the composition of the present invention is 1
It is 0 to 50% by weight (hereinafter, simply indicated by "%"), preferably 20 to 40%, and particularly preferably 25 to 35% because good foaming and less fluffing occur. The component (A) may be used alone or in combination of two or more kinds. Further, in the present invention, in addition to the component (A), the following general formula (3)

[0013]

[Chemical 5]

(In the formula, R ³ and R ⁴ have 16 to 22 carbon atoms.
Represents a saturated or unsaturated hydrocarbon group, X ′ represents a hydrogen atom, an alkali metal, ammonium or an alkanolamine having a hydroxyalkyl group having 2 or 3 carbon atoms, and p and q each represent a number of 0 to 10. (Shown) may be mixed with a dialkyl phosphate ester-based surfactant.

The component (B) isethionate-based surfactant used in the present invention is represented by the above general formula (2), in which R ² has 11 to 13 carbon atoms. , Specific examples thereof include sodium lauroyl isethionate, sodium myristoyl isethionate, potassium lauroyl isethionate, potassium myristoyl isethionate, triethanolamine lauroyl isethionate, sodium cocoyl isethionate, potassium cocoyl isethionate. And the like are preferred.
In the formula, Z is, for example, lithium, sodium, potassium or the like as an alkali metal, and triethanolamine, diethanolamine, monoethanolamine or the like as an alkanolamine.

The amount of component (B) incorporated into the composition of the present invention is
10 to 50%, more preferably 20 to 40%,
In particular, 25 to 35% is preferable because the foaming is good. The component (B) may be used alone or in combination of two or more.

In the solid detergent composition of the present invention, in addition to the above-mentioned components (A) and (B), the following optional components, that is, paraffin and fatty acid as a solidifying agent, are added as long as the effects of the present invention are not impaired. Nonionic surfactants such as higher alcohols, long-chain alkyl sulphates, polyethylene glycols, beef tallow alcohol ethoxylates, fatty acid soaps, fatty acid ethanolamides, diethylene glycol monostearate, monoglycerides, hard beef tallow, Na ₂ SO ₄ , CaH
Inorganic salts such as PO ₄ , MgHPO ₄ and NaH ₂ PO ₄ , inorganic powders such as talc and kaolin, starch, dextrin,
Sugars such as mannitol and glucose may be added. In addition to the phosphoric acid ester of component (A) or a salt thereof, if a phosphoric acid ester having a saturated or unsaturated hydrocarbon group having 8 to 14 carbon atoms or a salt thereof is blended within a range that does not reduce foaming, plasticity, Good adhesion.

In the composition of the present invention, long-chain fatty acids, liquid water-soluble polyols, glycerin, propylene glycol, sorbitol, methyl glucose ethoxylated / propoxylated ethers, lanolin alcohol ethoxylated / moisturizing agents are added to the composition of the present invention. Propoxylated ethers,
Natural compounds in the stratum corneum of the skin (eg sodium pyrrolidonecarboxylate, lactic acid, etc.), hydrolyzed proteins, collagen-derived proteins, aloe vera gel, acetamide monoethanolamide, silicone derivatives, lanolin and oil-soluble lanolin derivatives, (un) saturated fatty alcohols (For example, behenyl alcohol, squalene, etc.) Various animal oils and vegetable oils (for example, cottonseed oil, jojoba oil, etc.), etc .; As a foaming agent, higher fatty acids or salts thereof, alkylamine oxides, fatty acid alkanolamides (for example, stearic acid diethanolamide, etc.), imidazoline series Amphoteric surfactants, anionic amphoteric surfactants (eg alkyl sulfates, alkyl sulfonates, etc.), nonionic amphoteric surfactants (eg ethoxylated fatty alcohols, etc.), etc .;
Hexachlorophene, 3,4,4'-trichlorocarbanide, 3,4 ', 5-tribromsalicylanilide, 3-trifluoromethyl-4,4'-dichlorocarbanilide, tetramethylthiuramdisque as fungicides Fido,
2,4,4'-Trichloro-2'-hydroxydiphenyl ether, etc .; chamomile extract, allantoin, guaiazulene, glycyrrhizinic acid, methyl salicylate, etc. as an anti-inflammatory agent; ethylenediaminetetraacetic acid, dibutylhydroxytoluene, etc. as an antioxidant;
Fragrances, dyes, ultraviolet absorbers and the like can be added. The content of these optional components is 0 to the composition of the present invention.
It is preferably 50%.

The solid detergent composition of the present invention can be produced, for example, according to the method shown below. That is,
First, an unneutralized phosphoric acid ester and an alkaline aqueous solution in an amount necessary for neutralizing the phosphoric acid ester are heated in a kneader and uniformly mixed. After that, an isethionate-based surfactant is added, and the mixture is further stirred and mixed until it becomes uniform, then taken out from the kneader and cooled to room temperature with a chilling roll or the like. After adding a fragrance, a dye, etc. to this, the mixture is kneaded with a soap plodder, extruded from the cone portion, and then molded with a stamping machine to obtain the solid detergent composition of the present invention.

[0020]

The solid detergent composition of the present invention is hypoallergenic to the skin and excellent in foaming,
Moreover, it does not cause smoldering or melting.

[0021]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto.

Example 1 and Comparative Example 1 A solid detergent composition whose composition is shown in Table 1 was prepared by the following method. (Preparation method) Each component was stirred and mixed in a kneader, then 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 solid detergent composition.
With respect to each of the obtained solid detergent compositions, the degree of swelling and foaming were evaluated by the following methods. The results are also shown in Table 1.

(Foggyness) A stamped solid detergent is placed in a soap box so as to be half immersed in water, and immersed in water at 25 ° C. for 1 hour. Take this out and put the immersion side up 1
Leave in a 00% RH desiccator for 24 hours. afterwards,
Take out the solid detergent from the desiccator and set it on a rheometer (NRM-2010T-CW, manufactured by Fudo Kogyo Co., Ltd.), and let a flat plate indenter with a diameter of 1 cm enter from the surface.
The distance from the surface when the drag force of kg was obtained was measured, and the degree of fuzzy was calculated from the following formula. Softness (mm) = approach distance after immersion The larger the value, the higher the softness.

(Foaming) Each solid detergent was evaluated by a specialized panelist for hand washing, and the foamability was evaluated according to the following evaluation criteria. A: Foams very well. ◯: Foams well. ○ to △: Slight foaming. Δ: Does not foam much. X: No foaming.

[0025]

[Table 1]

As is clear from the results shown in Table 1, the product of the present invention (Example 1) is less irritating to the skin than the comparative product (Comparative Example 1), and the degree of swelling is slight. At the same time, it brought a rich lather.

Example 2 A solid detergent having the following composition was prepared in the same manner as in Example 1.

[0028]

(Table 2) (Component) (%) Sodium monolauryl phosphate 12.0 Sodium monostearyl phosphate 32.0 Sodium cocoyl isethionate 33.0 Purified stearic acid 10.0 Coconut oil fatty acid 9.0 Perfume 1.2 Pigment 0.3 Moisture balance

Example 3 A solid detergent having the following composition was prepared in the same manner as in Example 1.

[0030]

[Table 3] (Component) (%) Sodium monolauryl phosphate 8.4 Sodium dilauryl phosphate 3.6 Sodium monostearyl phosphate 22.4 Sodium distearyl phosphate 9.6 Sodium cocoyl isethionate 33.0 Purified stearin Acid 10.0 Coconut oil fatty acid 9.0 Fragrance 1.2 Pigment 0.3 Moisture balance

Example 4 A solid detergent having the following composition was prepared in the same manner as in Example 1.

[0032]

Table 4 (Components) (%) Sodium monolauryl phosphate 12.0 Sodium monostearyl phosphate 32.0 Sodium lauroyl isethionate 33.0 Purified stearic acid 10.0 Coconut oil fatty acid 9.0 Triclosan 0.2 Fragrance 1.2 Pigment 0.3 Moisture balance

As described above, all of the solid detergents obtained in Examples 2 to 4 are hypoallergenic to the skin, exhibit abundant foaming, and do not cause swelling or melt-down. It was

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[Procedure amendment]

[Submission date] January 11, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In the composition of the present invention, long-chain fatty acids, liquid water-soluble polyols, glycerin, propylene glycol, sorbitol, methyl glucose ethoxylated / propoxylated ethers, lanolin alcohol ethoxylated / moisturizing agents are added to the composition of the present invention. Propoxylated ethers,
Natural compounds in the stratum corneum of the skin (eg sodium pyrrolidonecarboxylate, lactic acid, etc.), hydrolyzed proteins, collagen-derived proteins, aloe vera gel, acetamide monoethanolamide, silicone derivatives, lanolin and oil-soluble lanolin derivatives, (un) saturated fatty alcohols (For example, behenyl alcohol, squalene, etc.) Various animal oils and vegetable oils (for example, cottonseed oil, jojoba oil, etc.), etc .; As a foaming agent, higher fatty acids or salts thereof, alkylamine oxides, fatty acid alkanolamides (for example, stearic acid diethanolamide, etc.), imidazoline series Amphoteric surfactants, anionic surfactants (eg alkyl sulfates, alkyl sulfonates, etc.), nonionic surfactants (eg ethoxylated fatty alcohols, etc.); Emissions, 3,4,4'-trichloroethane carba acetonide, 3,4 ', 5-tri bromo salicylanilide, 3-trifluoromethyl-4,4'-dichlorophenyl carbanilide, tetramethylthiuram disuccinimidyl Fi de, 2,
4,4'-trichloro-2'-hydroxydiphenyl ether, etc .; chamomile extract, allantoin, guaiazulene, glycyrrhizic acid, methyl salicylate, etc. as an anti-inflammatory agent; ethylenediaminetetraacetic acid, dibutylhydroxytoluene, etc. as an antioxidant; , An ultraviolet absorber or the like may be added.
The content of these optional components is 0 to 50 relative to the composition of the present invention.
% Is preferable.

Claims (1)

[Claims] 1. The following components (A) and (B); (A) the following general formula (1): (In the formula, R ¹ represents a saturated or unsaturated hydrocarbon group having 16 to 22 carbon atoms, and X and Y are each a hydrogen atom, an alkali metal, ammonium or an alkanolamine having a hydroxyalkyl group having 2 to 3 carbon atoms. And n represents a number of 0 to 10) 10 to 50% by weight of a phosphoric acid ester or salt thereof represented by: (B) the following general formula (2) (In the formula, R ² represents a saturated or unsaturated hydrocarbon group having 9 to 17 carbon atoms, and Z represents a hydrogen atom, an alkali metal, ammonium or an alkanolamine having a hydroxyalkyl group having 2 to 3 carbon atoms) A solid detergent composition comprising an isethionate-based surfactant represented by the formula 10 to 50% by weight.