JP2001040390A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent composition which irritates the skin little, exhibits high foaming properties and good foam qualities, is excellent in the feeling of use during and after the use, and has good aging stability. SOLUTION: This composition contains 0.5-40 wt.% fatty acid salt comprising an 8-22C fatty acid and at least one amino acid or its alkali metal, ammonium, or organic ammonium salt, provided the equivalent ratio of amino acid-derived amino groups of base pairs against carboxyl groups contained in the fatty acid salt to the alkali metal, ammonium, or organic ammonium is (1/5)-(5/1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent having low skin irritation, high foaming properties and good foam quality, excellent feeling in use during washing and after washing, and good stability over time. Composition.

[0002]

2. Description of the Related Art Various surfactants are used in detergent compositions according to the purpose. However, in the case of body cleaners, rich foaming and favorable feeling of use suitable for Japanese are used as the main components. Thus, alkali metal salts of fatty acids or organic ammonium salts such as triethanolammonium have been mainly used. These fatty acid salts alone have good foaming properties, but their foam quality is somewhat coarse and lacks elasticity, and their stability over time is poor. Therefore, they are used in combination with other surfactants for the purpose of improving them. Is common.

As an example of such a detergent composition, a composition comprising a combination of a fatty acid salt, an amide ether sulfate type anionic surfactant and an alkyl phosphate type anionic surfactant (JP-A-5-201852). , A composition comprising a combination of a laurate and a secondary amide type N-acyl amino acid salt (JP-A-5-156284), a composition comprising a combination of potassium laurate, potassium myristate, potassium oleate and polyoxyethylene castor oil (JP-A-61-300), fatty acid salts and o-
Composition comprising a substituted malate (Japanese Patent Application Laid-Open No. 59-1)
No. 5500). Further, as an example limited to an ammonium salt or an organic ammonium salt of a fatty acid, a composition in which an ammonium salt or a triethanol ammonium salt of a fatty acid is combined with an acylglutamate-type anionic surfactant (JP-A-61-287992) ), A composition comprising a combination of an alkanolamine salt of a fatty acid, an alkyl phosphate ester type anionic surfactant and an amine oxide type nonionic surfactant.
JP-A-8-103598), a composition comprising a combination of a triethanolammonium salt of a fatty acid and a sulfosuccinate-type anionic surfactant (JP-A-1-40417).
Publication) and the like.

[0004]

Many detergent compositions in which a fatty acid salt and various surfactants are combined have a slightly creamy foaming effect, but the effect is not sufficient. In some cases, the foaming properties of the fatty acid salt are rather suppressed, and there is a drawback that a feeling of wetness is given after washing and the usability is remarkably deteriorated. In addition, in the case of an alkali metal salt of a fatty acid, in consideration of the stability of the composition, it is necessary to control the pH of the composition to be basic, which imposes a heavy burden on the skin and also has an excessive degreasing power. Tactile feeling after washing was strong. Salts of fatty acids and organic ammonium, such as fatty acid triethanolammonium salt, have a weak basicity, but have low foaming properties, coarse foam, and a strong wet feeling after washing, leading to discomfort during washing. In addition, the irritation to the skin is not satisfactory, and further, there is a problem in stability over time such as remarkable coloring and deterioration of odor during storage.

[0005] It is an object of the present invention to provide a detergent composition which has low skin irritation, high foaming properties and good foam quality, is excellent in use during washing and after washing, and has good stability over time. It provides things.

[0006]

That is, the present invention relates to a method for preparing a fatty acid salt comprising a fatty acid having 8 to 22 carbon atoms and one or more of an amino acid or an alkali metal salt, an ammonium salt or an organic ammonium salt of an amino acid. A detergent composition containing 0.5 to 40% by weight, wherein an equivalent ratio of an amino group derived from an amino acid of a base pair to a carboxyl group contained in the fatty acid salt to an alkali metal, ammonium or organic ammonium is 1/5 to 5%. It is a cleaning composition characterized by being 5/1.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The fatty acid used in the present invention has 8 to 22 carbon atoms, for example, caprylic acid, capric acid,
Lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, coconut oil fatty acid, palm kernel oil fatty acid, tallow fatty acid, etc., which are a mixture, and when the carbon number is 7 or less, the irritation to the skin becomes strong. When the number of carbon atoms is 23 or more, the foaming property and the stability with time decrease. Examples of the amino acids used in the present invention include acidic amino acids such as aspartic acid and glutamic acid; glycine, sarcosine, alanine, β-alanine, phenylalanine, valine, leucine, isoleucine, threonine, methionine, theanine, serine, proline, and γ-amino acid. Neutral amino acids such as butyric acid and γ-aminocaproic acid; and basic amino acids such as arginine, ornithine, histidine, lysine and tryptophan. Examples of the alkali metal, ammonium and organic ammonium include sodium, potassium, ammonium, monoethanolammonium, diethanolammonium, and triethanolammonium.

The compounding amount of the fatty acid and the amino acid or the alkali metal salt, ammonium salt or organic ammonium salt of the amino acid of the present invention is 0.5 to 40% by weight, preferably 2 to 35% by weight.
However, if the amount is less than 0.5% by weight, foaming properties, favorable foam quality and feeling of use cannot be obtained, and the stability over time deteriorates. On the other hand, if the amount exceeds 40% by weight, irritation to the skin becomes strong and stability with time deteriorates. The equivalent ratio of the amino group derived from the amino acid to the carboxyl group contained in the fatty acid salt of the present invention and the alkali metal, ammonium or organic ammonium is 1/5 to 5/1, preferably 2/5 to 2/1 for acidic amino acids. 3/4 to 5/2 for neutral amino acids and 1 for basic amino acids
/ 1 to 4/1. If the equivalent ratio is smaller than 1/5, the skin will be more irritating, and the desired foam quality and feeling of use will not be obtained, and the stability over time and the persistence of the foam will be impaired.
On the other hand, if the equivalent ratio is larger than 5/1, the desired foam quality and feeling of use cannot be obtained, and the stability over time and the sustainability of the foam deteriorate.

The amino group derived from the amino acid and the alkali metal salt, ammonium salt and organic ammonium salt are 0.1 to 5 equivalents per 1 equivalent of the carboxyl group, and preferably 0.5 to 2 equivalents for the acidic amino acid. Equivalent, 0.6 to 2 equivalents for neutral amino acids, and 0.1 equivalent for basic amino acids.
15 to 0.8 equivalents. To adjust the fatty acid salt, first add the required amount of amino acid and a basic substance other than the amino acid to the required amount of purified water, and raise the temperature to 70 ° C. while stirring, so that the fatty acid salt of the desired composition is obtained. After the arrival, the required amount of fatty acid is added, the mixture is stirred until the liquid becomes transparent, and then cooled.

[0010] The detergent composition of the present invention may contain, if desired, components generally incorporated, for example, an alkyl ether sulfate type anionic surfactant, an acylmethyl taurate type anionic surfactant, and an amide ether sulfate type anionic surfactant. Anionic surfactants such as ionic surfactants, acyl amino acid salt type anionic surfactants, alkyl ether carboxylate type anionic surfactants, alkyl betaine type amphoteric surfactants, amido betaine type amphoteric surfactants Surfactant, imidazolinium betaine-type amphoteric surfactant, amide amino acid-type amphoteric surfactant, alkylglycine-type amphoteric surfactant, alkyliminodiacetic acid-type amphoteric surfactant, β-alkylaminopropionic acid-type amphoteric surfactant , Alkyliminodipropionic acid type amphoteric surfactant, alkyldiamino Ampholytic surfactants such as tilglycine-type amphoteric surfactants, alkylsulfobetaine-type amphoteric surfactants, amidosulfobetaine-type amphoteric surfactants, and polyoxyethylene alkyl ether-type nonionic surfactants Surfactant, polyoxyethylene alkyl phenyl ether type nonionic surfactant, polyoxyethylene fatty acid ester type nonionic surfactant, sorbitan ester type nonionic surfactant, polyoxyethylene sorbitan ester type nonionic surfactant Surfactant, polyoxyethylene polyoxypropylene alkyl ether type nonionic surfactant,
Fatty acid alkanolamide type nonionic surfactant, polyoxyethylene fatty acid alkanolamide type nonionic surfactant, glycerin fatty acid ester type nonionic surfactant, polyglycerin fatty acid ester type nonionic surfactant, amine oxide -Type nonionic surfactants, nonionic surfactants such as alkylglucoside-type nonionic surfactants, higher alcohols such as hexadecyl alcohol and octadecyl alcohol, glycerin, ethylene glycol, propylene glycol and 1,3-butane Polyhydric alcohols such as diols, squalane, jojoba oil, olive oil, castor oil, lanolin, oils such as lecithin, cellulose ether type cationic polymer compounds, cationic polyvinyl pyrrolidone derivatives, cationic polyacrylic acid derivatives, Ionic polyamide derivatives, poly dimethyldiallylammonium chloride, copolymers of dimethyldiallylammonium chloride and acrylic acid amide, cationic polymer compounds such as alkyl polyethylene imine,
Silicone derivatives such as highly polymerized methylpolysiloxane, dimethylsiloxane / methyl (polyoxyethylene) siloxane copolymer, ethylene glycol distearate,
Pearling agents such as styrene polymers, preservatives such as paraoxybenzoate, sodium benzoate and phenoxyethanol, tonic agents such as 5-methyl-2-isopropylcyclohexanol and pepper tincture, ethylenediaminetetraacetate, citric acid, nitrilotriacetic acid A chelating agent such as trisodium, an ultraviolet absorber such as a benzophenone derivative or a benzotriazole derivative, a dye, a fragrance and the like can be added to such an extent that the effects of the present invention are not impaired.

[0011]

Industrial Applicability The cleaning composition of the present invention has low skin irritation, excellent foaming properties, excellent foaming properties, excellent use during washing and after washing, and good stability over time. Therefore, it can be used for a body soap composition, a hand soap composition, a face wash detergent composition, a hair shampoo composition, a dishwashing detergent composition and the like.

[0012]

EXAMPLES The present invention will be specifically described with reference to examples. Test methods and evaluation methods performed in the examples will be described below. (1) Skin irritation A closed patch test was performed on a test solution obtained by diluting the composition 10 times with purified water. 2 with healthy skin
Males in their 0s and 30s were treated as subjects, and 5
Name was the subject. The test solution was applied to the inner right upper arm, and purified water was applied to the inner left upper arm as a control. 2 from the patch
After 4 hours, the patch was peeled off and the test part was purified water 500 ml.
After washing for 1 hour, the sample was rested for 1 hour, and after 1 hour, the control and the test portion of the test solution were visually judged. Two points when there was little difference between the control and the test part of the test solution, one point when the test solution showed slight redness compared to the control, and one point when the test solution showed clear redness or edema The following three grades were evaluated based on the total score of the five people, with the case where it was given as 0. Low skin irritation. (7 points or more in total) Skin irritation is slightly high. (4 points or more and 6 points or less in total) High skin irritation. (3 points or less in total)

(2) Foaming power The composition was placed in a cup of a miller (model number IFM-100) manufactured by Iwatani Corporation and the hard water (100 in terms of calcium carbonate) was added.
50 g of a test solution diluted 10-fold with calcium chloride and ion-exchanged water so as to give ppm, artificial soil (50% by weight of olive oil, 20% by weight of oleic acid, 10% by weight of lanolin, 10% by weight of liquid paraffin) 10% by weight,
0.3 g of squalene (10% by weight) was added thereto, the cup was capped, and left at 40 ° C. for 1 hour. One hour later, the cup was attached to a miller, the mixture was stirred at 3000 rpm for 5 seconds, and the height of the foam one minute after the stirring was stopped was measured. A composition having a foam height of 7 cm or more from the lowest position of the cup was evaluated as a composition having a high foaming power.

(3) Sustainability of foam In the above (2), the height of the foam 5 minutes after the stirring was stopped was measured. Rated high composition. Persistence (%) = {(foam height after 5 minutes) / (foam height after 1 minute)} × 100

(4) Foaming property Ten men and women were panelists, and the foaming property when the body was washed with 5 g of the detergent composition was evaluated. The evaluation was performed on the following three scales based on a total score of 20 persons, with 2 points when foaming was felt good, 1 point when foaming was slightly unsatisfactory, and 0 point when foaming was bad. Good foaming. (30 points or more in total) Foaming is somewhat bad. (Total score 20 or more and less than 30) Foaming is poor. (Less than 20 points)

(5) Foam Quality The foam quality when the body was washed with 5 g of the detergent composition was evaluated using 10 male and female persons as panelists. 2 points when the foam felt fine and elastic, 1 when the foam felt slightly coarse
If the point or bubble felt coarse and lacked elasticity, the score was set to 0 and 2
From the total score of 0 persons, the following three grades were evaluated. Good foam quality. (Total point 30 points or more) The foam quality is somewhat poor. (Total score 20 or more and less than 30) The foam quality is poor. (Less than 20 points)

(6) Sliminess at the time of washing Ten men and women were panelists, and the sliminess at the time of washing the body with 5 g of the detergent composition was evaluated. 2 points if you do not feel slimy, 1 point if you feel a little slimy
Points and the slimy feeling were persistent and felt that rinsing took a long time, and the following three levels were evaluated based on the total score of 20 persons as 0 point. There is no slimy feeling. (30 points or more in total) There is a slight slimy feeling. (20 points or more and less than 30 points) The slimy feeling is persistent. (Less than 20 points)

(7) Feeling of Skin Tightening after Washing Ten men and women were panelists, and the feeling of skin tightening after washing the body with 5 g of the detergent composition was evaluated. 2 points if you feel that your skin is not firm at all, 1 point if you feel slightly tight, and 0 if you feel very tight
From the total score of 0 persons, the following three grades were evaluated. I don't feel tight. (30 points or more in total) I feel a little tight. (20 points or more and less than 30 points) Very tight. (Less than 20 points)

(8) Refreshing Feeling after Washing Ten men and women were panelists, and the refreshing feeling after washing the body with 5 g of the detergent composition was evaluated. The following three scales were given based on a total score of 20 persons, with 2 points when they felt very refreshed, 1 point when they felt that they were not very refreshed, and 0 points when they felt they were not refreshed at all. A sufficient refreshing feeling is obtained. (Total score of 30 points or more) A refreshing feeling cannot be obtained much. (Total score 20 points or more 3
(Less than 0 point) Refreshing feeling cannot be obtained. (Less than 20 points)

(9) Stability over time (appearance) The detergent composition was stored at -5 ° C. for 12 hours and then at 45 ° C. for 12 hours, and this cycle was repeated every day for one month. The appearance of the cleaning composition was observed and evaluated in the following two stages. 〇: Good stability. (There is no change in appearance for one month by observation after each cycle) ×: Poor stability. (Separation and precipitation are observed within one month, and the color is extremely high)

(10) Stability over Time (Odor) After the detergent composition was stored at 45 ° C. for one month, the odor was compared with the detergent composition stored at room temperature and evaluated in the following two steps. 〇: Good stability. (The odor is almost the same as the sample stored at room temperature.) ×: Poor stability. (The odor is clearly deteriorated compared to the sample stored at room temperature.) Examples 1 to 15 and Comparative Examples 1 to 10 Samples were prepared from fatty acids, amino acids and bases. Table 1
2 shows the combinations of the fatty acids, amino acids and bases of the samples prepared and the equivalent ratios of the amino groups derived from the amino acids to the carboxyl groups contained in the fatty acid salts and the alkali metals, ammonium and organic ammonium.

[0022]

[Table 1]

The prepared samples were evaluated based on the above evaluation method. Table 2 shows Examples 1 to 15 and Comparative Examples 1 to
The contents of 10 samples are shown, and the results of each evaluation are shown in Tables 3 to 6.

[0024]

[Table 2]

* The balance is purified water

[0026]

[Table 3]

[0027]

[Table 4]

From Table 3, it can be seen that the cleaning compositions of Examples 1 to 15 of the present invention have low skin irritation, excellent foaming properties, good foaming properties, excellent feeling during and after washing, and are stable over time. It can be seen that the cleaning composition has good properties.

Since the detergent composition of Comparative Example 1 contains less than 0.5% by weight of a fatty acid salt, the foam height after 1 minute, the sustainability of foam and the foaming property are low, and the preferable foam quality and Refreshing feeling after washing cannot be obtained. Since the detergent composition of Comparative Example 2 has a fatty acid salt content of more than 40% by weight, it is highly irritating to the skin, has a tight feeling of the skin after washing, and has poor temporal stability in appearance.

In the detergent compositions of Comparative Examples 3, 5 and 7, the equivalent ratio of the amino group derived from the amino acid to the carboxyl group contained in the fatty acid salt to the alkali metal salt, ammonium salt and organic ammonium salt is smaller than 1/5. It is highly irritating to the skin, has low foam sustainability, does not have favorable foam quality, does not provide a refreshing feeling after washing, has a strong feeling of firming of the skin after washing, and has poor temporal stability in appearance. In the detergent compositions of Comparative Examples 4, 6, and 8, the equivalent ratio of the amino group derived from the amino acid to the carboxyl group contained in the fatty acid salt and the alkali metal salt, ammonium salt, and organic ammonium salt exceeds 5/1. Low foam sustainability, no good foam quality, no refreshing feeling after washing, strong skin tightness after washing, poor stability over time in both appearance and odor.

Since the cleaning composition of Comparative Example 9 uses potassium laurate instead of the fatty acid salt of the present invention, it is highly irritating to the skin, has low foam sustainability, and has favorable foam quality and cleaning properties. The after-skin feeling after washing and the feeling after washing are not obtained, and the temporal stability in appearance is poor.
Since the detergent composition of Comparative Example 10 uses triethanolammonium laurate instead of the fatty acid salt of the present invention, it is highly irritating to the skin, and the foam height after 1 minute, the foam persistence, Poor foaming properties, no favorable foam quality, no refreshing feeling after washing and no firm feeling of skin after washing, strong slimy feeling during washing, and poor stability over time in both appearance and odor.

Claims (1)

[Claims] 1. A washing containing 0.5 to 40% by weight of a fatty acid salt comprising a fatty acid having 8 to 22 carbon atoms and one or more of an amino acid or an alkali metal salt, an ammonium salt and an organic ammonium salt of an amino acid. An agent composition,
A detergent composition, wherein the equivalent ratio of an amino group derived from a base pair amino acid to a carboxyl group contained in the fatty acid salt and an alkali metal, ammonium or organic ammonium is 1/5 to 5/1.