JPH07101838A - Production of shampoo composition - Google Patents

Abstract

PURPOSE:To stably obtain a shampoo composition presenting beautiful pearl luster and having excellent anti-dandruff effect. CONSTITUTION:The objective shampoo composition can be obtained by adding at 20-55 deg.C a pearl concentrate composition and a water-insoluble bactericide to an aqueous solution of an anionic surfactant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a shampoo composition, and more particularly to a method for producing a shampoo composition having pearl luster and having an anti-dandruff function.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
In order to enhance the commercial value of shampoos, rinses, hair wash creams, etc., the appearance of these compositions is made pearlescent. As a method therefor, generally employed is a method of crushing and mixing a natural substance such as mica and an inorganic substance, or crystallization of a higher fatty acid polyvalent metal salt or a fatty acid glycol ester. Furthermore, in recent years, attempts have been made to give the dandruff-removing hair care composition the above-mentioned pearlescent appearance (Japanese Patent Publication No. 4-30367).

However, the above method for producing an antidandruff hair care composition requires that a suspending agent such as ethylene glycol monostearate be added to a surfactant solution and then crystallized before the addition of the antidandruff agent. However, there is a problem in the process stability such as the case where crystallization is not successfully achieved by the selected surfactant species and composition or the cooling process, and a beautiful pearl luster cannot be obtained.
On the other hand, heat was required to dissolve the suspending agent, which was disadvantageous in terms of energy.

Therefore, a shampoo composition having a beautiful pearly luster and an excellent anti-dandruff function can be simply prepared.
It has been desired to develop a stable manufacturing method.

[0005]

Means for Solving the Problems As a result of intensive studies in view of such circumstances, the present inventors have found that adding an after-mentioned pearl concentrate composition and a water-insoluble bactericidal agent to an aqueous solution of anionic surfactant results in a beautiful appearance. The present inventors have found that a shampoo composition having a pearly luster and an excellent anti-dandruff effect can be stably produced, and completed the present invention.

That is, according to the present invention, a shampoo composition characterized in that an anionic surfactant is dissolved in water, and then a pearl concentrate composition and a water-insoluble bactericide are added to the solution at 20 to 55 ° C. A method for manufacturing a product is provided.

Examples of the anionic surfactant used in the present invention include alkyl sulfates, alkyl ether sulfates, alkyl aryl sulfonates, alkyl succinates, acylated glutamate, acylated taurine salts, alkyl sulfosuccinic acid. Salts, N-alkyl sarcosinates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates and α-olefin sulfonates, especially their sodium, magnesium, ammonium and mono-, di-, and triethanolamines. Salt etc. are mentioned. The alkyl groups generally contain 8 to 18 carbon atoms and may be unsaturated. The alkyl ether sulphates, alkyl ether phosphates and alkyl ether carboxylates can contain from 1 to 10 ethylene oxide or propylene oxide units per molecule, preferably from 2 to 3 ethylene oxide units per molecule.

Of these, preferred examples include sodium oleyl succinate, ammonium lauryl sulfosuccinate, ammonium lauryl sulfate, sodium salt of polyoxyethylene lauryl sulfate, triethanolamine salt or annium salt, sodium N-lauryl sarcosinate and the like. And particularly preferred examples include
Sodium lauryl sulfate, triethanolamine lauryl sulfate, triethanolamine monolauryl phosphate, sodium lauryl ether sulfate 1EO, 2EO and 3E
O, ammonium lauryl sulfate and ammonium lauryl ether sulfate 1EO, 2EO and 3EO.

The amount of the anionic surfactant used is 5 to 30% by weight (hereinafter, simply “%”) based on the total amount of the shampoo composition.
Is shown), and particularly preferably 5 to 25%.

In the present invention, it is preferable to use a nonionic surfactant and / or an amphoteric surfactant together with these anionic surfactants because foaming and foam quality are improved.

The nonionic surfactants used in the present invention include aliphatic (C ₈ -C ₁₈ ) first or second linear or branched chain alcohols or phenols and alkylene oxides (usually ethylene oxide). Condensation products (generally having 6 to 30 ethylene oxide groups), mono- or di-alkyl alkanolamides, such as coco-mono or di-ethanol amides and coco-
Mono-isopropanolamide etc. are mentioned.

Examples of the amphoteric surfactant used in the present invention include alkylamine oxide, alkylbetaine, alkylamidopropylbetaine, alkylsulfobetaine, alkylglycinate, alkylcarboxyglycinate, alkylamphoteric propionate, alkylamidopropylhydroxysalt. And the like, and specific examples thereof include laurylamine oxide, cocodimethylsulfopropylbetaine, laurylbetaine, cocoamidopropylbetaine, coco amphoteric sodium propionate and the like.

The amount of the nonionic surfactant and / or the amphoteric surfactant used is preferably 10% or less with respect to the total amount of the shampoo composition so as not to impair the effects of the present invention brought about by the anionic surfactant.

In the production method of the present invention, as the first step, the anionic surfactant and optionally a nonionic surfactant and / or an amphoteric surfactant are dissolved in water to give an aqueous solution.

The amount of water used is preferably 50 to 90%, and particularly preferably 60 to 80% with respect to the total amount of the shampoo composition in order to maintain the state of the liquid shampoo.

In the production method of the present invention, in the second step, the pearl concentrate composition and the water-soluble bactericide are added to the aqueous surfactant solution at 20 to 55 ° C.
Stir so that the composition is evenly dispersed. Both may be added at the same time, or either may be added first.

Examples of the pearl concentrate composition used in the present invention include the following compositions (a), (b) and (c).

(A) The following four components (A), (B), (C)
And (D), (A) the following general formula (1)

[0019]

[Chemical 1]

15 to 40% of a fatty acid glycol ester represented by: (B) The following general formula (2)

[0021]

[Chemical 2]

(In the formula, R ² represents a linear or branched alkyl group having 8 to 20 carbon atoms, R ³ represents a hydrogen atom or a methyl group, M represents an alkali metal, an alkaline earth metal, an ammonium ion, or a carbon number. Alkylsulfate ester salt or polyoxyalkylene alkylsulfate ester salt represented by the formula (1) to (1) to (3) alkyl-substituted ammonium or hydroxyalkyl-substituted ammonium having 2 or 3 carbon atoms, and n represents the average number of added moles of 0 to 8). 0.3 to 12.5%, (C) the following general formula (3)

[0023]

[Chemical 3]

(In the formula, R ⁴ represents a linear or branched saturated or unsaturated hydrocarbon group having 7 to 17 carbon atoms, and R ⁵
And R ⁶ 3 to 25% fatty acid dialkanolamide represented by represents a -C ₂ H ₄ or -C ₃ H _6, respectively), (D) 45~85% water, containing, and (B), ( The mixing ratio of the three components C) and (D) is as shown in the following 4 on the triangular diagram of the three component system shown in FIG.
Point a [(B) = 12.5: (C) = 5: (D) = 82.
5], b [(B) = 6.25: (C) = 30: (D) = 63.
75], c [(B) = 0.5: (C) = 30: (D) = 69.
5], d [(B) = 0.5: (C) = 5: (D) = 94.
5] The composition within the range surrounded by the straight line connecting

(B) The following four components (A '), (B'),
(C ') and (D'), (A ') 10-40% of the fatty acid glycol ester represented by the general formula (1), (B') the following general formula (4)

[0026]

[Chemical 4]

(In the formula, R ⁷ represents a linear or branched alkyl group having ⁸ to 20 carbon atoms, R ⁸ represents a hydrogen atom or a methyl group, and M represents an alkylsulfone represented by the above. Succinate salt or polyoxyalkylene alkyl sulfosuccinate salt 0.8 to 16%, (C ') aliphatic dialkanolamide represented by the general formula (3) 8 to 24%, (D') water 50 to 81% , As essential components, and (B ′), (C ′),
The mixing ratio of (D ') ternary components is shown in the following four points on the ternary diagram of the ternary system shown in FIG. 7
0], b '[(B') = 20: (C ') = 30: (D') = 5
0], c '[(B') = 1: (C ') = 30: (D') = 6
9], d '[(B') = 1: (C ') = 10: (D') = 8
9] The composition within the range surrounded by the straight line connecting

(C) The following four components (A ″), (B ″),
(C ″) and (D ″), (A ″) fatty acid glycol ester represented by the general formula (1) (B ″) the following general formula (5) or (6)

[0029]

[Chemical 5]

[Wherein R⁹And R^TenEach has 7 to 1 carbon atoms
9 represents a saturated or unsaturated hydrocarbon group represented by R¹¹And R¹²
Are each -CH₂COOM ′, -CH₂CH₂COOM 'or -CH₂CH (O
H) -CH₂SO₃M '(where M'is hydrogen, alkali metal,
Lucari earth metal, alkanolamine or ammonium
Represents a group)¹³Is hydrogen or a group -CH₂COOM ′, -CH
₂CH₂COOM ′ or -CH₂CH (OH) -CH₂SO₃Show M ']
One or two of the represented amidoamine type amphoteric surfactants
More than one kind (C ″) fatty acid dialkanol represented by the general formula (3)
Lamide containing (D ″) water and containing (B ″), (C ″) and (D ″) three components
On the triangular chart of the ternary system shown in FIG. 3, the mixing ratio is
Next 4 points a ″ [(B ″) = 40: (C ″) = 5: (D ″) = 5
5], b ″ [(B ″) = 40: (C ″) = 35: (D ″) = 2
5], c ″ [(B ″) = 5: (C ″) = 45: (D ″) = 5
0], d ″ [(B ″) = 5: (C ″) = 15: (D ″) = 8
[0], the composition inside the rectangle (including each side) formed by connecting
Stuff.

The pearl concentrate composition comprises 2
Add to the aqueous surfactant solution maintained at 0-55 ° C. At this time, the pearl concentrate composition is also 20-
It is preferable to keep it at 55 ° C. The pearl concentrate composition may be added gradually or the entire amount may be added at once.

The amount of the pearl concentrate composition added is preferably 5 to 30% with respect to the total amount of the shampoo composition, and particularly preferably 5 to 25% because it does not impair the shampoo performance such as feeling of finish.

Specific examples of the water-insoluble bactericide include Zn and
Examples include pyrithione salts such as Mg and Al, sulfur, and selenium disulfide. These are added as a solid as it is or pre-dispersed in water and added. When predispersed in water, a dispersion aid such as a polymer or a surfactant may be used. The shape of the water-insoluble bactericide may be needle-like, plate-like, granular, etc., and the particle size is 0.01 to 20 μm, and further 0.1.
It is preferably 10 μm, particularly preferably 0.1 to 2 μm.

The amount of the water-insoluble bactericide added is preferably 0.01 to 10% with respect to the total amount of the shampoo composition, and particularly preferably 0.
3 to 1.5% is preferable from the viewpoint of bactericidal effect and safety.

In the present invention, in addition to the above-mentioned components, methylparaben, urea,
Benzoate, benzyl alcohol, ethanol, phenoxyethanol, preservatives such as caisson CG, citric acid,
A pH adjusting agent such as phosphoric acid, lactic acid, sodium hydroxide or triethanolamine, a viscosity reducing agent such as ethanol or propylene glycol, a fragrance, a pigment or the like can be added.

[0036]

Industrial Applicability According to the production method of the present invention, a shampoo composition having a beautiful pearly luster and an excellent anti-dandruff action can be easily and stably obtained.

[0037]

EXAMPLES The present invention will be described below in greater detail by giving Examples, but the present invention is not limited thereto. In addition,
In the following, “part” means part by weight.

Example 1 A shampoo composition having the following composition was obtained by the following production method. (Manufacturing method) After dissolving (4) in 10 parts of (10), (3) is added to prepare a preliminary liquid. Then, (1), (2), (8), (6), (7) and (9) are added in this order to the rest of (10) and dissolved uniformly to obtain a surfactant solution. After that, it is confirmed that the temperature of the solution is in the range of 20 to 55 ° C., pearl concentrate is added, and the mixture is stirred uniformly. Further, the above preparatory liquid is added and uniformly stirred to obtain a shampoo composition.

[0039]

[Table 1] (Composition) (Parts) (1) Lauryl sulfate triethanolamine (40%) 40.00 (2) Coconut oil fatty acid diethanolamine 3.00 (3) Zinc pyrithione (50%) 2.00 (4) Polyvinyl Alcohol 1.00 (5) Pearl Concentrate ^* 10.00 (6) Perfume 0.30 (7) Dye Trace (8) Methylparaben 0.2 (9) Phosphoric Acid 0.2 (10) Purified Water Balance Total 100 * : Pearl concentrate composition (part) Ethylene glycol distearate 20 Polyoxyethylene (EO3) lauryl sulfate sodium 10 Coconut oil fatty acid diethanolamide 10 Purified water 60

The obtained shampoo composition had a beautiful pearly luster and an excellent anti-dandruff action.

[Brief description of drawings]

FIG. 1 is a drawing showing a mixing ratio between three components of a solvent of a pearl concentrate composition (a) used in the present invention.

FIG. 2 is a drawing showing a mixing ratio between three components of a solvent of the pearl concentrate composition (b) used in the present invention.

FIG. 3 is a drawing showing the mixing ratio between the three components of the solvent of the pearl concentrate composition (C) used in the present invention.

Claims (1)

[Claims] 1. A method for producing a shampoo composition, which comprises dissolving an anionic surfactant in water, and then adding a pearl concentrate composition and a water-insoluble bactericide at 20 to 55 ° C. to the solution. .