JPH0741798A - Solid soap composition - Google Patents

Abstract

PURPOSE:To provide a solid soap compsn. which has good shape retention in water and improved foaming property. CONSTITUTION:The solid soap compsn. contains (A) a fatty acid salt in which a fatty acid salt component having 18 carbon atoms and two or more carbon- carbon double bonds and a fatty acid component having 16 carbon atoms and one or more carbon-carbon double bonds account for 2wt.% or less in total (pref. each 1wt.% or less) and (B) one or more surfactants selected from among amphoteric and semi-polar surfactants.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid soap composition having improved foam performance and improved meltdown.

[0002]

2. Description of the Related Art Conventionally, natural fats and oils have been used as raw materials and saponified with an alkali to prepare a soap base consisting of a fatty acid salt. The soap base is used as a perfume, coloring agent, glycerin, E
It is widely practiced to blend an auxiliary component such as DTA to obtain a soap composition. In this case, properties such as hardness, solubility, foamability, and detergency of soap change depending on the fatty acid salt composition of the soap base, so that beef tallow, palm oil, palm can be obtained so that soap with desired properties can be obtained. A mixture of a plurality of oil / fat raw materials such as oil is used as the raw material oil / fat. The most commonly used raw material fats and oils are beef tallow 70-85.
It is a mixed fat / oil comprising 30% to 15% by weight of palm oil.

The above-mentioned conventional raw material fats and oils for solid soaps are, for example, a mixture of beef tallow and coconut oil, as described above, and the fatty acid salt which is the soap base obtained from them is
It has a saturated fatty acid salt and an unsaturated fatty acid salt having a carbon number of about 12 to 18 as the main components, and the carbon distribution of natural fats and oils was basically used as it was. For this reason, it is thought that there is a limit to the foaming of solid soap, and after separating saturated fatty acids and unsaturated fatty acids of various carbon numbers, these are newly combined to create the foaming quality that is the priority quality of solid soap. There was no example of success in the idea of developing a product that has both goodness and undissolvedness.

On the other hand, in order to improve foaming, an amphoteric surfactant, for example, a betaine-based surfactant, or a semipolar surfactant, for example, a highly foaming surfactant such as a tertiary amine oxide type surfactant is blended. Although it was attempted to increase the foaming by doing so, when it was placed in a place where it always comes into contact with water, such as a bathroom, there was a drawback that it melted and collapsed remarkably, so there was a practical problem and improvement of foaming It was thought to be difficult to achieve both melting and unmelting.

However, if a mixture of beef tallow and coconut oil is used as the raw material for fats and oils, the soap base contains unsaturated fatty acids other than unsaturated fatty acid salts having 18 carbon atoms and one carbon-carbon double bond. The fatty acid salt is contained in a larger amount than necessary (for example, about 3 to 10% by weight), and when such an oil / fat raw material is used, the obtained solid soap cannot dissolve and collapse, and cannot improve the foam performance. This is because it has the disadvantage that these improvements are extremely difficult.

In order to solve the above-mentioned conventional drawbacks, the present inventors obtained the palm oil as a raw material by subjecting it to specific treatment means including transesterification, fractional distillation and washing with water. A soap base having a content of the fatty acid salt component having 18 carbon atoms and having two or more carbon-carbon double bonds of 2% by weight or less has been proposed (JP-A-4-117497).

The solid soap using this soap base material has considerably improved dissolution collapse, foam performance and the like as compared with the conventional one. However, as a solid soap that is sufficiently satisfactory, further improvement is required.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a solid soap composition which prevents meltdown and further improves the foaming performance.

[0009]

According to the present invention, in all fatty acid salts contained in the following component (A) and (B) (A) soap composition, a carbon-carbon double bond having 18 carbon atoms is formed. A fatty acid salt having a total content of 2% by weight or less of a fatty acid salt component having 2 or more and a fatty acid salt component having 16 carbon atoms and having 1 or more carbon-carbon double bonds (B) an amphoteric surfactant, and A solid soap composition comprising one or more selected from semipolar surfactants is provided, and in particular, the component (A) is contained in all fatty acid salts contained in the soap composition. The solid soap composition, wherein the content of the fatty acid salt component having 18 carbon atoms and having two or more carbon-carbon double bonds is 1% by weight or less, and the component ( A) has 1 carbon atom in all fatty acid salts contained in the soap composition In carbon - 1 also content of the fatty acid salt component having at least one carbon-carbon double bond
The solid soap composition is characterized by comprising a fatty acid salt in an amount of not more than 10% by weight, and further, the amphoteric surfactant of the component (B) is a betaine-based surfactant, and the component (B). There is provided the solid soap composition, wherein the semipolar surfactant of B) is a tertiary amine oxide type semipolar surfactant, and the content of the component (B) is 0. The solid soap composition is provided in the range of 0.5 to 20.0% by weight.

The present inventors have found that the fatty acid salt as the soap base is an unsaturated fatty acid other than the unsaturated fatty acid salt having 18 carbon atoms and having one carbon-carbon double bond, which has 18 carbon atoms. The total content of the fatty acid salt component having two or more carbon-carbon double bonds and the fatty acid salt component having 16 carbon atoms and one or more carbon-carbon double bonds is 2% by weight or less,
Moreover, it was found that when one or more kinds selected from amphoteric surfactants and semipolar surfactants are blended, the foam performance is extremely excellent, and dissolution collapse is remarkably improved as compared with conventional ones, The present invention has been completed.

That is, even if the content of the unsaturated fatty acid salt is suppressed to 2% by weight or less, the dissolution collapse can be improved, but the foam performance cannot be sufficiently enhanced. This is because the amphoteric surfactant and the semipolar surfactant are used. It could be achieved for the first time by blending one or two or more selected ones.

First, the component (A) will be described in detail. As the fat and oil raw material in the solid soap composition of the present invention, conventionally known raw materials are used. Specifically, fatty acids of various carbon chain lengths, mixtures of fatty acid esters, beef tallow that is a natural fat, animal fats and oils typified by lard, coconut oil,
Vegetable oils and fats represented by palm oil, palm kernel oil, soybean oil, olive oil and the like can be used alone or in combination.

The fatty acid salt composition of the above-mentioned specific composition of the solid soap composition of the present invention uses the above-mentioned raw material of fats and oils, which is subjected to separation and treatment by fractional distillation, hydrogenation and other methods, and then the fatty acid composition. Is newly adjusted to fall within the above-specified range, and then saponified with sodium hydroxide or an alkaline mixture of sodium hydroxide and potassium hydroxide,
Alternatively, it can be produced by neutralization. Further, the order of the above respective steps can be appropriately changed, and for example, after saponification or neutralization with an alkali, the composition of a predetermined fatty acid salt may be adjusted so as to fall within the above defined range of the present invention.

As described above, the solid soap composition of the present invention comprises a fatty acid salt component having a carbon number of 18 and two or more carbon-carbon double bonds in the total fatty acid salt as a base, and a carbon atom. The total content with the fatty acid salt component having a number of 16 and having at least one carbon-carbon double bond is 2% by weight or less, preferably 1
It is not more than 0.5% by weight, more preferably not more than 0.5% by weight.
When the content is more than 2% by weight, the solid soap dissolves and collapses,
It is not preferable in any of the foam performances.

The content of the fatty acid salt having 18 carbon atoms and having 2 or more carbon-carbon double bonds is 1% by weight or less,
The content is preferably 0.5% by weight or less, particularly preferably 0.2% by weight or less, and the content of the fatty acid salt having 16 carbon atoms and at least one carbon-carbon double bond is 1% by weight or less, The performance is further improved by controlling the content to preferably 0.5% by weight or less.

The preferred fatty acid salt composition of component (A) of the solid soap composition of the present invention, and particularly preferred fatty acid salt composition are shown in Table 1 below.

[Table 1] Incidentally, for example, “C18F1” represents a fatty acid salt having 18 carbon atoms (C) and one carbon-carbon double bond (F).
In the composition of Table 1, the total amount of C ₁₆ F ₁ and C ₁₈ F ₂ is 2% by weight or less, preferably 1% by weight or less.

Component (A) of the solid soap composition of the present invention
As described above, the weight ratio of sodium salt to potassium salt in the counter ion in the total fatty acid salt is 99: 1 to 70:
30 is preferable, and particularly preferably 95: 5 to 8:
Twenty. When the weight ratio of the sodium salt to the potassium salt is within this range, a solid soap having good foaming performance and significantly improved melt dissolution as compared with the conventional one can be obtained.

Next, the component (B) will be described in detail. As the amphoteric surfactant, one type or two or more types represented by the following general formulas (I) and (II) are preferably used. Betaine-based amphoteric surfactant represented by the general formula (I)

[Chemical 1] (In the formula, R ₁ is an alkyl group or an alkenyl group having an average carbon number of 7 to 20, R ₂ and R ₃ are an alkyl group having 1 to 4 carbon atoms, Q
Is selected from the group consisting of alkylene groups having 1 to 3 carbon atoms and hydroxyalkylene groups having 2 to 3 carbon atoms, and Z is --CO
O ⁻ or —SO ₃ ^— , x is an integer of 1 to 5, y
Represents 0 or 1. Q when it is ^- Z is -COO
Is an alkylene group and y is 0 or 1. Such betaine-based amphoteric surfactants include betaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, amidobetaine-type amphoteric surfactants, and amidosulfobetaine-type amphoteric surfactants.

Typical betaine-type amphoteric surfactants include:
Examples include decyldimethylaminoacetic acid betaine, lauryldimethylaminoacetic acid betaine, cetyldimethylaminoacetic acid betaine, and coconut oil alkyldimethylaminoacetic acid betaine. Typical sulfobetaine-type amphoteric surfactants include coconut oil alkyldimethylsulfopropylbetaine, stearyldimethylsulfopropylbetaine, lauryldimethylaminohydroxypropylsulfobetaine, and the like.
Representative amidobetaine type amphoteric surfactants include lauric acid amidopropyldimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine,
Examples include myristate amidopropyl dimethylamino acetic acid betaine. Representative amidosulfobetaine type amphoteric surfactants include lauric acid amidopropyldimethylaminohydroxypropylsulfobetaine and coconut oil fatty acid amidopropyldimethylaminohydroxypropylsulfobetaine.

Imidazolinium betaine-type amphoteric surfactant represented by the general formula (II)

[Chemical 2] (In the formula, R ₄ represents an alkyl group or an alkenyl group having an average carbon number of 5 to 21, n is 1 or 2, and M represents an alkali metal or an organic amine.)

Examples of such imidazolinium betaine-type amphoteric surfactants include cabryl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, Palm oil alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, capryl-N-carboxyethyl-N-hydroxyethyl imidazolinium betaine, lauryl-N
-Carboxyethyl-N-hydroxyethyl imidazolinium betaine, coconut oil alkyl-N-carboxyethyl-N-hydroxyethyl imidazolinium betaine, etc. are mentioned.

As the semipolar surfactant, one or more of the compounds represented by the following general formula (III) are preferably used.

[Chemical 3] (In the formula, R ₁ is an alkyl group or alkenyl group having an average of 7 to 20 carbon atoms, R ₂ and R ₃ are alkyl groups having 1 to 4 carbon atoms, x is an integer of 1 to 5, y is 0 or Represents 1.)

Typical semipolar amphoteric surfactants include:
Lauryl dimethyl amine oxide, myristyl dimethyl amine oxide, stearyl dimethyl amine oxide,
Palm oil alkyl dimethyl amine oxide, lauric acid amido propyl dimethyl amine oxide, myristic acid amido propyl dimethyl amine oxide, palmitic acid amido propyl dimethyl amine oxide, stearic acid amido propyl dimethyl amine oxide, coconut oil fatty acid amido propyl dimethyl amine oxide, etc. To be

In the present invention, the blending amount of the component (B) is 0.5 to 20.0% by weight, preferably 1.0 to 10.0.
% By weight. The blending amount of this component (B) is 0.5% by weight.
If it is less than 20%, no sufficient improvement in foaming performance is recognized, and if it is 20
If the content exceeds 10% by weight, it is not preferable because of melting and collapse.

The soap composition of the present invention may contain various conventionally known auxiliary components. Examples of such auxiliary components include stabilizers such as fragrances, EDTA, ethane-1-hydroxy-1,1-diphosphonic acid (EHDP) or alkali metal salts thereof, organic polybasic acids or salts thereof, and the like.

Further, in order to adjust the effect of residual oil on the skin, generally known superfat agents and various skin protective agents can be added. Specific examples thereof include hydrocarbons such as squalene, squalane, olefin oligomer, wax, petrolatum and mineral oil; isostearic acid,
Fatty acids such as behenic acid; fatty acid esters such as various glycerides, sugar esters, lanolin, isopropyl myristate, isopropyl palmitate, isobutyl stearate; cetyl alcohol, stearyl alcohol,
Aliphatic alcohols such as oleyl alcohol; polyols such as glycerin, polyethylene glycol, polypropylene glycol; ethoxylates of alcohols and fatty acids; silicones such as dimethyl silicone; various other proteins and protein derivatives; vitamins and the like. .

Furthermore, the soap composition of the present invention comprises
In addition to pigments and fragrances, anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate, 2, 4,
A bactericide such as 4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbanilide or benzoic acid can be added.

Further, other surfactant may be added within a range that does not impair the effects of the present invention. As such a surfactant, for example, α-sulfo fatty acid ester,
α-olefin sulfonic acid, alkyl sulfuric acid, polyoxyethylene alkyl ether sulfuric acid, polyoxyethylene alkyl ether acetic acid, alkyl sulfocarboxylic acid, N-
Examples thereof include acylamino acid, N-acylmethyltaurine, acylsulfosuccinic acid, acylisethionic acid and salts thereof, and nonionic surfactants such as sugar-based nonionic surfactants.

As a method for producing a soap composition and further a solid soap using the components (A) and (B) and the above-mentioned auxiliary components of the present invention, conventionally known methods can be adopted. For example, a soap composition is dried to obtain a soap base, the required ingredients are uniformly mixed in the soap base with a mixer, and the mixture is extruded using a roll or a plotter and stamped, or the soap composition is treated with sugar or , Polyhydric alcohol, ethanol, and water were mixed, and further each component was added, heated to 70 to 80 ° C. to form a uniform transparent soap solution, poured into a solidifying frame, cooled and solidified, cut, and dried. A method such as post stamping is adopted. Further, the mixing method of the components (A) and (B) is not particularly limited, and for example,
The component (B) is added to the component (A) obtained by saponification or neutralization, uniformly mixed, and dried, kneaded and stamped by a conventionally known method, or only the component (A) is a conventionally known method. And the like, the component (B) is added thereto, the mixture is uniformly mixed with a mixer, and the mixture is kneaded and stamped.

[0030]

EXAMPLES Next, the present invention will be described in more detail based on examples. [Test Method] In Examples and Comparative Examples, the test methods for dissolution collapse and foam performance are as follows. (Dissolution) After immersing the sample in water at 30 ° C for 1 hour,
The one dried for one hour is evaluated by the following criteria in comparison with the control sample immediately after production. 0: There is no difference compared to the control sample. 1: There is a slight meltdown compared to the control sample. 2: There is some meltdown compared to the control sample. 3: There is considerable meltdown compared to the control sample. It should be noted that the evaluation points 0 and 1 have a commercial value, and the evaluation points 2 and 3 have no commercial value. (Foam Performance) The sample was subjected to a sensory test by hand washing by 30 panelists. Comparative sample 2 was used as a standard product in Example 1 and comparative sample 1 was used as a standard product in Example 2. Each standard product and the following criteria were evaluated. did. 3: Very good foaming performance compared to the standard product. 2: The foam performance is slightly better than that of the standard product. 1: Foam performance does not change compared to the standard product. 0: Poor foam performance as compared with the standard product. From the above results, an average score of 30 persons was obtained and further evaluated according to the following criteria. ◎: 2.5 or more ○: 2 or more and less than 2.5 △: 1 or more 2
Less than x: less than 1 [Explanation of symbols] In Examples and Comparative Examples, for example, "C
"18F2" represents a fatty acid salt having 18 carbon atoms and 2 carbon-carbon double bonds.

Example 1 A mixture of fatty acids shown in Table 2 below was treated with an alkaline agent (NaO).
H) mixed fatty acid salt obtained by reaction with soap base,
A predetermined amount of the amphoteric surfactant shown in Table 2 and 1.1% by weight of a fragrance as an auxiliary component, 0.2% by weight of EDTA,
Titanium dioxide was added at a ratio of 0.2% by weight to obtain a water content of 10
A soap composition containing wt% was obtained. Next, the effect of this composition was evaluated, and the results are shown in Table 2 below. Soap composition: The total fatty acid is 100% by adding the unsaturated fatty acid salt shown in Table 2 to the common part (ratio by weight) of the following fatty acid salts. Common part: C12 / C14 / C16 / C18F0 / C1
8F1 = 15/5/30/15/35

[0032]

[Table 2]

Example 2 A mixture of the fatty acids shown below was prepared from Na salt / Table 3 shown below.
Prepared alkaline agent (NaOH / K
OH) to obtain a mixed fatty acid salt as a soap base, and a predetermined amount of the amphoteric surfactant shown in Table 3 and 1.1% by weight of a perfume as an auxiliary component, 0.2% by weight of EDTA, Titanium dioxide was blended at a ratio of 0.2% by weight to obtain a soap composition containing 10% by weight of water. Next, the effect of this composition was evaluated, and the results are shown in Table 3 below. Soap composition: The total fatty acid salt is 100% by adding the unsaturated fatty acid salt shown in Table 3 to the common part (ratio by weight) of the following fatty acid salts. Common part: C8 / C10 / C12 / C14 / C16 / C
18F0 / C18F1 = 2/2/10/5/30/15
/ 38

[0034]

[Table 3]

Example 3 Using the soap bases () shown in Table 4 below or the soap bases () shown in Table 5 below, solid soap compositions of the formulations (1) to (8) were obtained. . All of the compositions showed excellent performance in terms of dissolution and foaming performance.

[0036]

[Table 4]

[0037]

[Table 5]

(Formulation 1) Soap base () 88.25 parts by weight Coconut oil Alkyldimethylaminoacetic acid betaine 5 Palmitic acid 4 Lauric acid 1 EHDP 0.3 EDTA 0.05 Titanium dioxide 0.2 2,4,4 ′ -Trichloro-2'-human oxydiphenyl ether 0.2 Perfume 0.1 ───────────────────────────────── 100

(Formulation 2) Soap base () 82.7 parts by weight Lauryl dimethylamine oxide 3 Palmitic acid 7 Gelatin hydrolyzate 0.8 Methyl-6-o-capryl glucoside 5.0 EHDP 0.3 Titanium dioxide 0 .2 Fragrance 1.0 ──────────────────────────────── 100

(Formulation 3) Soap base () 84.5 parts by weight Laminic acid amidopropyl dimethylamino acetic acid betaine 5 Lauroylmethyl-β-alanine 2 Palmitic acid 4 Kaolin 3 EHDP 0.3 Titanium dioxide 0.2 Perfume 1. 0 ────────────────────────────────── 100

(Formulation 4) Soap base () 88.9 parts by weight Lauric acid amidopropyldimethylamine oxide 5 Palmitic acid 4 Highly polymerized polyethylene glycol (molecular weight 1.1 million) 0.5 Dipotassium glycyrrhizinate 0.1 EHDP 0.3 Titanium dioxide 0.2 Perfume 1.0 ──────────────────────────────── 100

(Formulation 5) Soap base () 82.3 parts by weight Palm oil alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine 7 Palmitic acid 4 EHDP 0.3 Glycerin 3.5 Diglyceryl diisostearate 1.5 Allantoin 0.2 Titanium dioxide 0.2 Perfume 1.0 ──────────────────────────────── 100

(Formulation 6) Soap base () 87.3 parts by weight Coconut oil fatty acid amide propyldimethylaminoacetic acid betaine 4 squalane 2 palmitic acid 5 EHDP 0.3 aloe extract powder 0.2 titanium dioxide 0.2 fragrance 1. 0 ──────────────────────────────── 100

(Formulation 7) Soap base () 84.5 parts by weight Coconut oil Alkyl dimethyl sulfopropyl betaine 8 Sodium alginate 1 Palmitic acid 5 EHDP 0.3 Titanium dioxide 0.2 Perfume 1.0 ────── ────────────────────────── 100

(Formulation 8) Soap base () 74.45 parts by weight Lauric acid amidopropyldimethylamino hydroxypropylsulfobetaine 9 Sodium lauroyl isethionate 9 Palmitic acid 4 Stearic acid 2 EHDP 0.3 EDTA 0.05 Titanium dioxide 0.2 Perfume 1.0 ──────────────────────────────── 100

[0046]

The solid soap composition of the present invention comprises a fatty acid salt component having a carbon number of 18 and two or more carbon-carbon double bonds and a carbon-carbon double salt having a carbon number of 16 in all fatty acid salts. The total content of fatty acid salt components having one or more bonds is 2% by weight.
By containing the following fatty acid salt and one or more selected from the group consisting of an amphoteric surfactant and a semipolar surfactant, the foam performance and the dissolution collapse performance are remarkably improved.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area C11D 1:90)

Claims (6)

[Claims] 1. A fatty acid salt component having 18 carbon atoms and 2 or more carbon-carbon double bonds among all fatty acid salts contained in the following component (A) and (B) (A) soap composition: Fatty acid salt having a total content of 2% by weight or less with a fatty acid salt component having a number of 16 and having one or more carbon-carbon double bonds (B) One selected from amphoteric surfactants and semipolar surfactants Alternatively, a solid soap composition containing two or more kinds. 2. The content of the fatty acid salt component having a carbon number of 18 and having at least two carbon-carbon double bonds in the total fatty acid salt contained in the soap composition is 1% by weight or less. The solid soap composition according to claim 1, which is a fatty acid salt of 3. The content of the fatty acid salt component having a carbon number of 16 and at least one carbon-carbon double bond in the total fatty acid salt contained in the soap composition is 1% by weight or less. The solid soap composition according to claim 2, which is a fatty acid salt of 4. The solid soap composition according to claim 1, 2 or 3, wherein the amphoteric active agent as the component (B) is a betaine-based surfactant. 5. The semipolar activator of component (B) is a third polar activator.
The solid soap composition according to claim 1, 2 or 3, which is a semi-polar amine oxide type surfactant. 6. The content of the component (B) is 0.5-2.
2. The range of 0.0% by weight,
The solid soap composition according to 2, 3, 4 or 5.