JP2824158B2 - 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 cleaning composition, and more particularly to a cleaning composition having a good feeling suitable for cleaning a body such as hair or skin.

[0002]

2. Description of the Prior Art A body cleansing composition generally comprises a general-purpose anionic surfactant as a main component, and a soap, that is, a higher fatty acid salt, and a hair for washing the skin. For cleaning, alkyl sulfates and sulfonates are mainly used.

[0003] Soaps used for skin cleansing generate soap scum (higher fatty acid Ca salt) during rinsing and adhere to the skin, so that the lubricity of the skin surface is remarkably reduced, resulting in creaking and firmness. is there. In order to improve this, a complex type is prepared by blending a humectant typified by oil such as higher alcohol or propylene glycol with the above soap, or blending an anionic surfactant that does not generate scum. Attempts have been made to use detergents.

However, when an oil is added, a desired effect cannot be obtained by adding a small amount of oil, and on the contrary, when the oil is added in a large amount, foaming is significantly inhibited. When compounding an anionic surfactant that does not generate scum,
As the amount is increased, creaking is reduced, but when the amount is increased to the extent that a sufficient effect is exhibited, there is a problem in that foam disappears and sliminess occurs.

[0005] On the other hand, alkyl sulfates and sulfonates used for hair washing do not produce scum during rinsing, so they do not have squeaks and tightness as in the case of using soap. Poor lubricity. Therefore,
In order to improve this, higher alcohols, hydrocarbons, oils such as silicones have been blended, but also in this case, the desired effect cannot be obtained with a small amount of addition.
When blended in a large amount, there is a disadvantage that foaming is significantly inhibited.

[0006] As a detergent, a detergent containing an N-alkylacylamino acid-based surfactant is known. For example, JP-A-50-150701 and JP-A-63-2962 disclose a liquid detergent using a N-long-chain acylamino acid-based surfactant as a low-irritant surfactant. A composition is disclosed, and JP-A-53-132007 discloses an improved solid detergent to which an N-long-chain acyl neutral amino acid is added.

However, water-soluble N- methyl-acylamino acid salt used in the cleaning agent described in these publications touch, there is a problem with the feeling. Further, since the secondary amide-type acylamino acid sodium salt is inferior in water solubility, it is not generally used in large amounts as a detergent base conventionally, and it is difficult to obtain a favorable feel by adding a small amount as disclosed in the above publication. There is a problem.

[0008] Accordingly, an object of the present invention is to provide excellent foaming during cleaning, good foam removal during rinsing, no sliminess on the rinsing, and an object to be cleaned from rinsing to after drying. An object of the present invention is to provide a detergent composition which has a high surface lubricity and does not cause a feeling of squeak and tightness after use, and is excellent in use feeling.

[0009]

As a result of various studies, the present inventors have found that a specific N-acyl compound is used as a main base of a detergent, and that the compound is combined with another surfactant in a specific ratio. It has been found that the above-mentioned object is achieved by using the above.

The present invention has been made on the basis of the above findings, and includes an N-acyl compound (A) represented by the following chemical formula 3 (same as the chemical formula 1 ) and a surfactant [however, excluding the component (A)] ] (B) is contained, and the weight ratio of the component (A) to the component (B) is 99/1 to 1/1 (component (A) / component (B)).
And a cleaning composition.

[0011]

Embedded image

[0012]

Hereinafter, the cleaning composition of the present invention will be described in detail.

Component (A) of the cleaning composition of the present invention.
The N-acyl compound represented by Chemical Formula 3 has a property of reacting with calcium in tap water to form plate crystals having high lubricity.

[0015] In the N- acyl compounds, the formula 3
In the general formula (I), RCO is a linear acyl group having 8 to 22 carbon atoms, and particularly a linear acyl group having 10 to 14 carbon atoms (caprinoyl group, lauroyl group, myristoyl group, etc.). preferable. When the carbon number exceeds 22,
It is not preferable because the lubricating properties of the generated plate-like crystals are reduced. Further, if the number of carbon atoms is less than 8, foaming is reduced, which is not preferable. N is an integer of 1 to 11,
From the viewpoint of lubricity of the plate-like crystal, 1 to 5 is preferable, and 1 or 2 is particularly preferable.

The lubricating properties of the plate-like crystals formed by the reaction between the N-acyl compound and calcium may be determined, for example, by examining the plate-like crystals on dried pork skin (Aloask, manufactured by Antibody Chemical Industry) on physiological saline. Is determined by measuring the coefficient of static friction of the blank.

It is very important that the N-acyl compound has a secondary amide structure in which the N-acyl group is composed of the linear acyl. That is, when the acyl group constituting the N-acyl group is branched, or when the amide structure is a tertiary amide type, the formation of plate-like crystals is suppressed or the properties of the generated crystals are poor in lubricity. It is difficult to obtain a preferable feeling because of stickiness.

[0018] In the N- acyl compounds, before
M constituting the counter ion in the general formula (I)
Examples thereof include alkali metals such as sodium (hereinafter may be abbreviated as Na), potassium (hereinafter may be abbreviated as K), and inorganic or organic ammonium. Here, the organic ammonium refers to an acid form of an organic amine compound such as an alkanolamine such as monoethanolamine, diethanolamine, and triethanolamine (hereinafter may be abbreviated as TEA), an alkylamine, and a basic amino acid.

The content of the N-acyl compound in the composition of the present invention is preferably 5% by weight or more, more preferably 20 to 80% by weight. If the content is less than 5% by weight, it is difficult to obtain a refreshing good feeling due to plate crystals generated during rinsing.

Further, the component (B) of the cleaning composition of the present invention.
Various surfactants are used as the surfactant, and examples thereof include the following.

Examples of the anionic surfactant include, for example,
Examples of the sulfates and sulfonates include surfactants such as alkyl sulfates, polyoxyethylene alkyl sulfates, sulfosuccinic acids, taurates, isethionates, α-olefinsulfonic acids, and the like.Carboxylates include fatty acids. Soaps, fatty acid salts, ether carboxylic acid-based surfactants, acylated amino acid-based surfactants, and the like, and phosphate-based alkyl phosphate ester-based surfactants, and the like, and in terms of feel and foaming, Particularly, fatty acid-based, phosphate-based, and isethionate-based surfactants are preferably used.

Examples of the amphoteric surfactant include amphoteric surfactants such as carbobetaine, sulfobetaine, and imidazolinium betaine, such as hydroxypropylsulfobetaine and desalted secondary imidazolinium betaine. Is preferably used.

Examples of the nonionic surfactant include polyoxyalkylene addition type, polyoxypropylene, polyoxyethylene addition type, amine oxide type, mono or diethanolamide type, sorbitan fatty acid ester, glycerin fatty acid ester, and sucrose fatty acid ester. ,
Examples thereof include polyhydric alcohols such as alkyl saccharides and N-polyhydroxyalkyl fatty acid amides, and amine oxides, diethanolamides, and alkyl saccharides are particularly preferably used.

Examples of the cationic surfactant include a mono- or di-alkyl-added quaternary ammonium salt having a straight-chain or branched-chain alkyl group and those obtained by adding an alkylene oxide to the alkyl group. A straight chain monoalkyl quaternary ammonium salt having 12 to 16 carbon atoms;
Grade ammonium salts are preferably used.

These surfactants can be used alone or in combination of two or more depending on the performance of the target product.

The content of the above surfactant is preferably 0.1 to 45% by weight in the composition of the present invention.

In the cleaning composition of the present invention, the weight ratio of the N-acyl compound as the component (A) and the surfactant as the component (B) is as follows.
Component (B) = 99/1 to 1/1, preferably 95/5 to
It is contained so as to be in the range of 60/40. If the weight ratio is outside the above range, it is difficult to obtain a good feeling in use due to the generated lubricating plate-like crystals.

The form of the detergent composition of the present invention as a detergent is not particularly limited, and may be any form such as a liquid, a paste, a solid, and a powder.

The cleaning composition of the present invention contains various foaming aids and foam improving agents for the purpose of improving foaming and foaming quality as long as the formation of plate crystals having excellent lubricity during rinsing is not inhibited. Agents can be added.

The cleaning composition of the present invention contains the usual components of this type of cleaning composition, that is, humectants, feel improvers, viscosity modifiers, fragrances, pigments, etc., to impair the effects of the present invention. It can also be used together in a range that does not exist.

It goes without saying that the amounts of the above-mentioned foaming aid, foam quality improving agent and the above-mentioned common components can be arbitrarily changed according to the dosage form of the detergent composition.

The detergent composition of the present invention has a pH of 6
As described above, it is particularly preferable that the number be in the range of 7 to 10.

The cleaning composition of the present invention described in detail above is particularly suitable as a cleaning agent for the body such as skin or hair. However, the use of the cleaning composition is not particularly limited.

[0034]

Next, the present invention will be described in detail with reference to examples. However, the present invention is not limited to the embodiments described below.

Embodiment 1

A cleaning composition having the composition shown in Tables 1, 2 and 3 below was prepared, and the foaming amount of these cleaning compositions was measured by the following method. The precipitability of crystals and the feeling upon use were evaluated based on the following methods and criteria. The results are shown in Tables 1, 2 and 3 below.
And Table 4 below. The cleaning compositions Nos. 27 to 33 are comparative products.

(Measurement of Foaming Amount) For each detergent composition, a 20-fold diluted aqueous solution is prepared, and 100 ml of this solution (liquid temperature 40 ° C.) is poured into a graduated cylinder. Then
The stirring blade was placed in the above solution, and the volume (ml) of the foam generated 30 seconds after the start of the stirring was measured to determine the foaming amount. The rotation speed of the stirring blade was 1000 rpm, and the rotation was reversed every 5 seconds.

(Evaluation of Precipitation of Lubricious Plate Crystals) For each detergent composition, a 20-fold diluted aqueous solution was prepared with ion-exchanged water, and 1 ml of each of these solutions was added to 40 ml of 4 ° DH hard water at 40 ° C. After 10 seconds, the generation of crystals was visually judged and evaluated according to the following criteria.

(Evaluation of feeling of use) For each detergent composition, skin was washed (for all compositions) and hair (for some compositions) by panelists of 10 men and women.
Was performed, and the sensory evaluation at that time was performed. In the evaluation, the average value was calculated according to the following criteria. When the average value was 4.5 or more, it was very good (◎), when the average value was 3.5 to 4.4, it was good (○), and 2.5 to 3. Normally the case of 4 (△), 2.4
The following cases were determined to be defective (x). Out of bubbles at the time of rinsing 5; 4: Slightly defoamed. 3: Normal. 2: Bubble is somewhat poor. 1; foaming is poor. Slip when rinsing, slip after rinsing and slip after drying 5; Slip is good. 4: Slightly good slippage. 3: Normal. 2: Sliding is somewhat poor. 1: Sliding is poor.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

[Table 3]

[0043]

[Table 4]

Embodiment 2

[0045]

According to the above composition, heated water is
After dissolving the components and cooling, the above components and the components were added to prepare a liquid detergent composition.

When the skin and hair were washed with the obtained detergent composition, the foaming and foaming were good, the slip was good from rinsing to after drying, and the feeling of use was excellent.

Embodiment 3

[0049]

According to the above composition, the above water is added to
After dissolving the components and cooling, the above components were added to prepare a liquid detergent composition.

When the skin and hair were washed with the obtained detergent composition, the foaming and foaming were good, the slidability was good from rinsing to after drying, and the feeling of use was excellent. Example 4 [Blending composition] (% by weight) Lauroyl-β-alanine Na salt; 70 Lauric acid diethanolamide; 7 Stearic acid; 10 Fragrance; 1 Water; Balance According to the above blending composition, the ingredients were uniformly mixed at 60 ° C. After mixing, the mixture was cooled, kneaded, extruded, and stamped by a conventional method to prepare a solid detergent composition. When the skin and hair were washed with the obtained detergent composition, the foaming and foaming were good, the slidability was good from rinsing to after drying, and the feeling of use was excellent. Test Example 1 5 ml of each sample shown in Table 5 below was placed in a glass cup having a diameter of 3 cm, which was brought into close contact with the forearm, and the sample was allowed to penetrate the forearm for 30 minutes (then rinse with tap water and wipe with a towel). . Perform this operation twice a day for a total of 8
The test was performed on five test subjects, and on the 5th day, visual rash evaluation (presence or absence of erythema and desquamation) was performed by a skilled person according to the following criteria.
The results are shown in Table 5 below as average values. Judgment Criteria Erythema 0; No erythema is observed. 0.5; erythema is slightly observed. 1; erythema is slightly recognized. 2: Erythema is observed. 3: Erythema is very observed. Existence of desquamation 0; No desquamation is observed. 0.5; Desquamation is slightly observed. 1: Desquamation is slightly recognized. 2: Desquamation is observed. 3: Desquamation is observed very much.

[0052]

EFFECT OF THE INVENTION The cleaning composition of the present invention
Excellent lathering, good foam removal during rinsing, no sliminess on top of it, high lubricity on the surface to be cleaned from rinsing to drying, and squeaky feeling after use It has the property of being excellent in usability without generation of odor, and is particularly suitable as a cleaning agent for skin (body) cleaning or hair cleaning.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ identification code FI C11D 3/34 C11D 3/34 (58) Investigated field (Int.Cl. ⁶ , DB name) A61K 7/00-7/50 C11D 1/00-1/18 C11D 3/00-3/34

Claims (1)

(57) [Claims] 1. An N-acyl compound (A) represented by the following formula ( 1 ) and a surfactant [however, excluding the component (A)]
A detergent composition containing (B) and having a weight ratio of component (A) to component (B) of component (A) / component (B) = 99/1 to 1/1. Embedded image RCONH (CH ₂ ) _n COOM (I) wherein RCO represents a linear acyl group having 8 to 22 carbon atoms, n represents an integer of 1 to 11, and M represents an alkali metal or inorganic metal. Alternatively, it represents organic ammonium. ]