JP2003306694A - Transparent solid detergent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent solid detergent giving low stimulation to the skin and having excellent transparency, feeling in use, foaming property and stability. <P>SOLUTION: The transparent solid detergent contains 20-55 mass% component composed of one or more amide dibasic acid surfactant compound of general formula (1) (R<SP>1</SP>is a 7-21C alkyl or alkenyl; and (m) and (n) are each 1-3 and m+n≤4) in a form neutralized with one or more cationic compounds selected from basic alkali metal compounds, ammonia basic organic amine compounds and basic amino acid compounds at a neutralization degree of 1.5-2.0 equivalent. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a transparent solid detergent, and more specifically, it is a novel transparent solid containing a specific amide dibasic acid type anion, more preferably an acyliminodiacetic acid salt as a base. It relates to a cleaning agent.

[0002]

2. Description of the Related Art Conventionally, a transparent solid detergent contains fatty acid soap as a base, and saccharoids such as sugar, glycerin, sorbitol, propylene glycol, or polyols are mixed as a clarifying agent, and the mixture is mixed with water. It is manufactured by a so-called frame kneading method in which a lower alcohol is heated and melted, poured into a frame, and cooled and solidified. The transparent soap produced in this way has a high-grade feeling and is of high commercial value because it is transparent, but its composition is essentially the same as ordinary opaque fatty acid soaps. However, it is inevitable that there are drawbacks such as irritation to the skin due to free alkali in the product and free alkali generated by hydrolysis during use, bad foaming in hard water, and opacification during use.

As a transparent solid detergent base which does not have the drawbacks found in the conventional fatty acid transparent soap and has a mild and soft feeling to the skin, JP-A-55-25465.
Japanese Patent Publication discloses a technique of a transparent solid detergent containing an N-long chain acyl acidic amino acid salt as a base. This transparent solid cleaning agent has characteristics such as excellent transparency and not becoming opaque during use, but the foaming speed and volume during use are insufficient, and
It has the drawback of poor storage stability under high humidity. Therefore, in order to solve these drawbacks, JP-A-4-1297 proposes to use an ethanolamine salt of an N-long-chain acyl acidic amino acid and an alkali metal salt in combination, thereby improving usability and storage. Detergents with improved properties are disclosed. However, even in this case, satisfactory performances such as slimy feeling have not been obtained, and improvement thereof has been desired.

On the other hand, JP 54-30207 A discloses that
A transparent solid detergent using an amide diacid type anionic compound as a solid detergent base is disclosed. According to the report, an amide dibasic acid type anionic compound is preferable as a solid detergent base due to its good foaming power and moderate solubility. However, since amide dibasic acid type anions generally have a high freezing point and are not suitable for transparent solid detergents, the technique of the same publication generally relates to a syndet bar type solid detergent by mechanical kneading. However, there is no mention of whether or not it can be used as the base of a transparent solid detergent.

[0005]

DISCLOSURE OF THE INVENTION The present invention comprises a N-long chain acyl acidic amino acid salt, which is excellent in hypoallergenicity and transparency to the skin, as a base material, and retains the above-mentioned characteristics, and has a foaming property. It is an object of the present invention to provide a transparent solid detergent capable of improving the above-mentioned properties and further reducing the slimy feel to improve the usability.

[0006]

The transparent solid detergent of the present invention comprises an amide dibasic acid type surface-active compound represented by the following general formula (1);

[Chemical 2] [In the formula (1), R ¹ represents an alkyl group or an alkenyl group having 7 to 21 carbon atoms, and m and n
Each independently represent an integer of 1 to 3, provided that
m + n ≦ 4] and at least one amide dibasic acid type interfacial compound component, and a basic alkali metal compound, ammonia, a basic organic amine compound and a basic amino acid that neutralize the carboxylic acid group thereof. A neutralizing agent component consisting of at least one cationic compound selected from compounds, wherein the content of the amide dibasic acid type surface active compound component is 20 to 55% by mass, and the amide dibase The compounding amount of the neutralizing agent component is 1.5 to 2.0 equivalents relative to 1 equivalent of the acid type surface-active compound component. The transparent solid detergent of the present invention may further contain at least one amide dibasic acid type surface-active compound of the formula (1) and at least one anionic compound different from it.
In this case, the mass ratio of the at least one amide dibasic acid type surface-active compound to the different anionic compound is 5
It is preferably larger than 0:50. In the transparent solid detergent of the present invention, the amide dibasic acid type surface-active compound of the formula (1) is preferably selected from acyliminodiacetic acid. In the transparent solid detergent of the present invention, a polyhydric alcohol having 2 to 6 carbon atoms and 6 to 12 carbon atoms are added together with at least one amide dibasic acid type surface-active compound of the formula (1). At least one selected from the group consisting of hydrocarbons, thiourea, urea, and maltitol
You may further contain the clarifying agent which consists of a seed | species, In this case, content of this clarifying agent is 10-type with respect to the mass of said at least 1 type amide dibasic acid type surface-active compound.
It is preferably 60% by mass.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The amide dibasic acid type surface-active compound used in the present invention is a compound represented by the general formula (1). In the general formula (1), the R ¹ —CO— group is a fatty acid residue derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, and examples thereof include caprylic acid, capric acid, lauric acid, myristin. It is a fatty acid residue such as acid, palmitic acid, stearic acid, erucic acid, isostearic acid, oleic acid, linoleic acid, isooleic acid, coconut oil fatty acid, tallow fatty acid and palm oil fatty acid. In the formula (1), m and n are each independently 1
Indicates an integer of 3 and m + n ≦ 4.

Preferred examples of these amide dibasic acid type surface-active compounds are N-long chain acyliminodiacetic acid and N-
Long-chain acyl iminodipropionic acid, N-long-chain acyl-N
-Carboxyethylglycine and the like. Among these amide dibasic acid type surface-active compounds of the formula (1),
N-long-chain acyliminodiacetic acid is preferably used in the present invention because its foam quality is more creamy and the skin feel after washing is excellent.

The amide dibasic acid type surface-active compound of the general formula (1) used in the present invention is a stable transparent solid substance by neutralizing the two carboxylic acid groups with a cationic substance to a specific range. Can be formed. That is, at this time, the degree of neutralization of the two carboxylic acid groups of the amide dibasic acid type surfactant compound affects the transparency of the solid detergent. That is, to make a good transparent solid detergent,
It is necessary to use 1.5 equivalents to 2.0 equivalents of the neutralizing agent component, and more preferably 1.6 to 2.0 equivalents, per equivalent of the amide dibasic acid type surfactant compound component. Hereinafter, the number of equivalents of the neutralizing agent component to 1 equivalent of the amide dibasic acid type surfactant compound component will be referred to as the degree of neutralization. Since the amide dibasic acid type surface-active compound of the general formula (1) has two carboxylic acid groups involved in the neutralization reaction in one molecule, one equivalent is the gram molecular weight of the compound. To
It is a value obtained by dividing the number of carboxylic acid groups by two. Further, in the present invention, the basic compound used as the neutralizing agent component has one cationic atom or cationic group involved in the neutralization reaction in one molecule thereof. An equivalent weight is an amount equal to the gram molecular weight of the neutralizing compound.

When the degree of neutralization is less than 1.5 equivalents, the resulting solid detergent has insufficient transparency, and it has a transparency of 2.0.
When it is higher than the equivalent amount, the foaming property and the solidifying property of the obtained solid detergent become insufficient, and in some cases, coloration may occur over time.

In the present invention, examples of the cationic substance used as the neutralizing agent component include hydroxides and basic salts of alkali metals such as sodium and potassium, ammonia, monoethanolamine, diethanolamine, triethanolamine, and monoethanolamine. It is selected from organic amine salts such as isopropanolamine, diisopropanolamine and triisopropanolamine, and basic amino acids such as lysine, ornithine and arginine. The neutralizing agent component may be composed of only one of the above-mentioned cationic substances, or may be composed of a mixture of two or more thereof. Among these cationic substances for the neutralizing agent component, triethanolamine is preferable, whereby the transparent solid detergent obtained has the highest transparency.

As the amide dibasic acid type surface-active compound component used as a base of the transparent solid detergent of the present invention, one type of the compound of the general formula (1) may be used alone, or two or more types may be used. Used in combination. At this time, it is preferable that the content of the amide dibasic acid type surface active compound component contained in the transparent solid detergent is higher than 50% by weight of all the anion components contained in the transparent solid detergent.
When the blending amount of the amide dibasic acid type surfactant compound component with respect to all the anion components is less than 50% by weight, the effect of improving the slimy feel may be insufficient in the resulting detergent.

The transparent solid detergent of the present invention includes polyhydric alcohols having 2 to 6 carbon atoms such as glycerin, diglycerin, ethylene glycol, propylene glycol, butylene glycol, sorbit, glucose, fructose and sucrose. It may contain a clearing agent composed of a saccharide, a hydrocarbon having 6 to 12 carbon atoms, and one or more kinds of thiourea, urea, maltol, etc., and can be obtained by containing such a clearing agent. The transparency of the solid detergent can be further improved.

Further, in the production of the transparent solid detergent of the present invention, it is preferable to use the frame kneading method. That is,
A mixture obtained by adding an appropriate amount of water and a lower alcohol to the above components is heated to 80 to 85 ° C. and uniformly dissolved, and then this mixed solution is poured into a molding die to be cooled and solidified. At this time, the added lower alcohol and water are allowed to stand for a certain period until they scatter, or after cooling and solidification, the lower alcohol and water are removed while molding into a certain shape to obtain a transparent solid detergent.

In the transparent solid detergent of the present invention, other ingredients usually used in cosmetics for the purpose of adjusting the cleansing property and the feeling of use, for example, extracts derived from animals, plants, fish and shellfish, microorganisms, powders. Ingredients, liquid oils, solid oils, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, silicones, anionic surfactants other than amide dibasic acid type surfactants, cationic surfactants, amphoteric surfactants, Nonionic surfactants, humectants, water-soluble polymers, thickeners, coating agents, UV absorbers, anti-inflammatory agents, sequestering agents, sugars, amino acids, organic amines, synthetic resin emulsions, pH adjusters, skin One or more kinds of nutrients, vitamins, antioxidants, antioxidant aids, fragrances, water and the like may be added, if necessary, in an amount within the range that does not hinder transparent solidification.

In particular, a cationic polymer, which is one of water-soluble polymers, can be added to increase the foamability and further improve the feeling of use. Illustrative examples of suitable cationic polymers include cationized cellulose,
Examples thereof include cationized guar gum. If necessary, these additive components may be blended in the transparent solid detergent in a blending amount that does not impair the effects of the present invention, that is, a blending amount of 25% by mass or less. Further, as the anionic surfactant other than the amide dibasic acid type surfactant of the formula (1), N-acyl glutamate, N-acyl aspartate, N-acyl sarcosine salt, N-acyl glycine salt. , N-acyl-N-methyl-β-alanine salt, N-acyl-β-alanine salt and the like can be used. As described above, the blending amount of the anionic surfactant is preferably less than 1/2 of the total mass of the anionic surfactant components including the amide dibasic acid type surfactant compound component.

[0017]

EXAMPLES The present invention will be specifically described with reference to the following examples, but the present invention is not limited to these examples. A frame kneading method was used for molding the transparent solid detergent.

[0018] In each of Examples 1 to 5 and Comparative Examples 1 to 3 Examples 1 to 5 and Comparative Examples 1 to 3, the composition shown in Table 1 were prepared, the composition is subjected to the framed method,
Shape: columnar, size: solid cleaning agent with a diameter of 65 mm and a thickness of 20 mm was prepared.

[0019]

[Table 1]

In the production of coconut fatty acid acyliminodiacetic acid shown in Table 1, coconut fatty acid acyliminodiacetic acid salt was prepared by subjecting iminodiacetic acid and coconut fatty acid halide to a Schotten-Baumann reaction in a mixed solvent of acetone and water in the presence of a base. A reaction solution containing The reaction solution was subjected to deacetone treatment under reduced pressure, and its pH was lowered to 1.0 with a mineral acid to separate into an organic phase containing coconut fatty acid acyliminodiacetic acid and an aqueous phase. The organic phase was collected, transferred to a vat, cooled and solidified, and the solidified product was pulverized and further dried under reduced pressure. The degree of neutralization of the dibasic acid of the obtained compound with triethanolamine or with triethanol and potassium hydroxide (Example 3) was as shown in Table 1.

As the coconut fatty acid acylglutamic acid shown in Table 2, "Amisoft CA" (trademark) manufactured by Ajinomoto Co., Inc. was used.

The following tests were conducted on the characteristics of each cleaning agent. 1. Solidification The solidification was evaluated according to the following criteria. ◯: Good solidification Δ: Slightly bad solidification ×: Poor solidification 2. Transparency The transparency was visually evaluated. A: Good transparency B: A little transparency X: No transparency 3. Each of the 5 foaming panelists picked up each sample in the same manner as during normal hand washing, and actually foamed it, and evaluated the foamability at the average point according to the following criteria. ◯: Good foamability △: Normal foamability △: Poor foamability 4. Feel of use 5 panelists picked up each sample in the same manner as during normal face washing, and actually foamed, and the feel of use was evaluated as an average point according to the following criteria. ◯: There is no slimy feeling Δ: There is a slight slimy feeling ×: There is a slimy feeling 5. Texture panel after drying 5 people, each sample is picked up in the same way as when washing the face normally, and it is made to foam, and the face is washed, and the feel of the skin after drying on the washed face is averaged according to the following criteria. evaluated. ○: Smooth feeling △: Slightly smooth feeling ×: Stiffness 6. Stability 25 ° C, left for 1 month, observed and evaluated according to the following criteria. ◯: No change in transparency Δ: Slight loss of transparency X: Crystallized and turned white

[0023]

[Table 2]

As shown in Tables 1 and 2, from the results of Examples 1 to 5, the weakly acidic transparent solid detergent according to the present invention containing an amide dibasic acid type anion compound as a main component was particularly dried. The texture was excellent and the usability was excellent. From the results of Comparative Example 1, it was found that when the neutralization degree of the amide dibasic acid type anion is less than 1.5 equivalents, the solid detergent cannot maintain sufficient transparency. According to Comparative Example 3, when the amide dibasic acid type and another anionic surfactant are mixed and the content ratio of the amide dibasic acid type anion is out of the range of the present invention, there is no slimy feeling which is a feature of the present invention. It was confirmed that the feeling of use, foamability, and texture evaluation after drying were lowered.

Example 6 A transparent solid detergent was trial-produced according to the following formulation. The obtained product was a weakly acidic transparent solid detergent with a stable feeling of use. Composition % by mass N-lauroyl iluminodiacetate 30.0 Triethanolamine (1.8 equivalents) 25.6 Glycerin 10.0 Urea 5.0 Isopropyl alcohol 5.0 Purified water 24.3 Dipotassium glycyrrhizinate 0.01

Example 7 Composition % by mass N-lauroyl iluminodiacetate 30.0 Triethanolamine (1.8 equivalent) 25.6 Glycerin 10.0 Urea 5.0 Isopropyl alcohol 5.0 Purified water 24.1 Cation Cellulose 0.3 The obtained solid detergent was transparent and more stable in use.

[0027]

The transparent solid detergent of the present invention has the following excellent performances and advantages. (1) Since N-long-chain acyliminodiacetic acid salt is used as a base, the pH during use is mildly acidic to neutral, so it is mild to the skin. (2) It has excellent transparency and gives a refreshing feeling of use. (3) Good foaming power and cleaning power even for hard water.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AB031 AB032 AC102 AC121                       AC122 AC541 AC542 AC661                       AC662 AC681 AC682 AD132                       AD532 BB05 BB12 CC23                       DD01 DD21 EE06 EE07 EE10                       EE12                 4D077 AA09 AB10 AC07 BA07 DC02Y                       DC26Y DC48Y                 4H003 AB09 BA01 EB04 EB05 EB14                       EB18 FA02 FA10 FA18 FA21                       FA38

Claims (4)

[Claims] 1. An amide dibasic acid type surface-active compound represented by the following general formula (1): [In the formula (1), R ¹ represents an alkyl group or an alkenyl group having 7 to 21 carbon atoms, and m and n
Each independently represent an integer of 1 to 3, provided that
m + n ≦ 4] and at least one cationic amide dibasic acid type interfacial compound component selected from the group consisting of basic alkali metal compounds, ammonia, basic organic amine compounds and basic amino acid compounds. A neutralizing agent component comprising a compound, the content of the amide dibasic acid type surface-active compound component,
It is 20 to 55% by mass, and the compounding amount of the neutralizing agent component is 1.5 to 2.0 equivalents relative to 1 equivalent of the amide dibasic acid type surface-active compound component. Transparent solid detergent. 2. The at least one amide dibasic acid type surfactant of the formula (1), and at least one anionic compound different from the anionic compound. The transparent solid detergent according to claim 1, wherein the mass ratio of the surface-active compound to the different anionic compound is larger than 50:50. 3. The transparent solid detergent according to claim 1, wherein the amide dibasic acid type surfactant compound of the formula (1) is selected from acyliminodiacetic acid. 4. A polyhydric alcohol having 2 to 6 carbon atoms, a hydrocarbon having 6 to 12 carbon atoms, together with at least one amide dibasic acid type surface-active compound of the formula (1), It further comprises a clarifying agent consisting of at least one selected from thiourea, urea, and maltitol, and the content of this clarifying agent is based on the mass of the at least one amide dibasic acid type surface-active compound. , 10-60
The transparent solid detergent according to any one of claims 1 to 3, which is a mass%.