JP2587756B2 - Liquid 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 liquid detergent composition, and more particularly, to a liquid detergent composition which has excellent usability, is suitable for cleaning skin, hair, etc., has good foaming, and is stable at low temperatures. About things.

[0002]

2. Description of the Related Art Conventionally, shampoos for hair have been widely used as liquid detergent compositions for use on the body.
In recent years, liquid body shampoos and the like have been widely used in place of soaps because of their excellent usability and usability.

On the other hand, phosphate ester surfactants, which are a kind of anionic surfactants, have been found to be extremely mild surfactants having low irritation to the skin and hair. Used as a component.

[0004]

However, among these phosphate-based surfactants, their alkanolamine salts have a low Krafft point and are easily liquidized,
When used alone, it could not be said that sufficient foaming was always shown. In addition, the alkali metal salt has a problem that foaming is good, but the craft point is high, and it is difficult to make the alkali liquid.

The present inventors have found that a mixture of the phosphate-based surfactants represented by the following general formulas (1) and (2) has good foaming and a low Kraft point, Patent application (Japanese Patent Application No. 3-297267)
issue). However, although the detergent composition containing these phosphate-based surfactants has a low Kraft point, it has a drawback that the low-temperature stability for a long period is poor.

[0006] Therefore, a liquid detergent composition excellent in foaming and low-temperature stability has been desired.

[0007]

Under such circumstances, the inventors of the present invention have conducted intensive studies, and as a result, a phosphate ester-based surfactant represented by the following general formulas (1) and (2):
It has been found that, when a specific water-soluble anionic surfactant is used in combination at a specific ratio, a detergent composition having good foaming properties and excellent low-temperature stability can be obtained, and the present invention has been completed.

That is, the present invention provides the following component (a):
(B) and (c): (a) General formula (1)

[0009]

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(Wherein R ¹ represents a straight-chain hydrocarbon group having 5 to 12 carbon atoms, and X ¹ and X ^{2 each} represent a potassium atom or a hydrogen atom). (B) General formula (2)

[0011]

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(Wherein, R ² represents a straight-chain hydrocarbon group having 11 to 15 carbon atoms, and X ³ and X ^{4 each} represent a potassium atom or a hydrogen atom). In the range of (a) / [(a) + (b)] = 0.2 to 1 (weight ratio), 3 to 60% by weight in total of (a) and (b). Salt, polyoxyethylene alkyl ether sulfate, amide amino acid salt, N-acyl-methyl taurine salt, polyoxyethylene alkyl sulfosuccinate, N-acyl-methyl-β-alanine salt, and acyl glutamate. An object of the present invention is to provide a liquid detergent composition containing 1 to 20% by weight of one or more water-soluble anionic surfactants.

R ¹ of the compound represented by the general formula (1) as the component (a) used in the present invention has 5 to 5 carbon atoms.
Twelve straight-chain alkyl groups or alkenyl groups are exemplified, and particularly preferred are straight-chain alkyl groups such as pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl and dodecyl. In the present invention, in addition to these methyl-branched alkyl phosphates, ethyl-branched, propyl-branched, butyl-branched or pentyl-branched alkyl phosphates may be mixed.

As R ² of the compound represented by the general formula (2) as the component (b) of the present invention, an alkyl group or an alkenyl group having 11 to 15 carbon atoms can be mentioned, and in particular, an undecyl group, a dodecyl group, A linear alkyl group such as a tridecyl group, a tetradecyl group, and a pentadecyl group is preferred.

The mixing ratio of these components (a) and (b) is (a) / [(a) + (b)] = 0.2 by weight.
１1, preferably 0.3 to 0.8. If it is less than 0.2, the kraft point of the composition is high, and it is difficult to obtain a stable liquid detergent.

The phosphoric acid ester salts of the components (a) and (b) are, for example, reacted with a corresponding aliphatic alcohol by a phosphorylating agent such as phosphoric anhydride or phosphorus oxychloride, and neutralized with potassium hydroxide. It is manufactured by Here, the aliphatic alcohol is a straight-chain alcohol or a 2-methyl-branched alcohol alone or when the product is (a) / [(a)
+ (B)] = 0.2 to 1 may be used in advance. Commercially available alcohols such as Diadol 115L (manufactured by Mitsubishi Kasei Co., Ltd.) and Dovanol 23I (manufactured by Mitsubishi Yuka Co., Ltd.) are mixtures of straight-chain alcohols and 2-methyl branched alcohols. a) /
A mixture of phosphate ester salts satisfying [(a) + (b)] = 0.2 to 1 is obtained.

In the liquid detergent composition of the present invention, these components (a) and (b) are added in a total amount of 3 to 60% by weight.
(Hereinafter simply indicated by%), preferably 10 to 40%.

Further, as the water-soluble anionic activator (c), an alkyl or acyl group having 1 carbon atom is preferred.
In the range of 1 to 13, those having a craft point of 0 ° C. or less are preferable,
Alkyl sulfates, polyoxyethylene alkyl ether sulfates, secondary and tertiary amide amino acid salts called so-called imidazoline surfactants (JP-A-63-128)
No. 100), N-acyl-methyltaurine salt, polyoxyethylene alkylsulfosuccinate, N-acyl-methyl-β-alanine salt and acylglutamate may be used alone or in combination. it can. Here, examples of the salt include alkali metal salts such as sodium and potassium, organic amine salts such as triethanolamine and basic amino acids, and ammonium salts.

These components (c) are contained in the total composition in an amount of from 1 to 2
0%, preferably 2 to 10% is blended. The liquid detergent composition of the present invention preferably contains the components (a), (b) and (c) in a total amount of 4 to 60%, particularly preferably 10 to 40%.

Further, the liquid detergent composition of the present invention includes:
If necessary, components used in ordinary detergents, for example, humectants such as propylene glycol, glycerin, and sorbitol; viscosity modifiers such as methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxyvinyl polymers, xanthan gum, guar gum, and ethanol; triclosan, trichloro Bactericides such as carbane; anti-inflammatory agents such as dipotassium glycyrrhizinate and tocopherol acetate; anti-dandruff agents such as zinc pyrithione and octopirox; preservatives such as methylparaben and butylparaben; other pearling agents, flavors, pigments, ultraviolet absorbers , An antioxidant and the like can be blended within a range that does not impair the effects of the present invention.

The detergent composition of the present invention can be produced by a usual method, and the composition itself has a pH of 6
It is preferable to adjust the value to ９9.

[0022]

The liquid detergent composition of the present invention has a good feeling in use, does not damage the skin and hair, has good foaming, and has excellent low-temperature stability. Therefore, it can be used not only as a shampoo and a body shampoo, but also as a detergent for directly contacting the skin for a long time, such as a kitchen detergent.

[0023]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Reference Example 1 Phosphate potassium salts (A) and (B) shown in Table 1 were obtained using various starting alcohols. The number of carbons in the table is the total number of carbons in the alkyl portion of the phosphate ester.

[0025]

[Table 1]

Example 1 Liquid detergent compositions having the compositions shown in Tables 2 and 3 were produced by a conventional method, and evaluated for long-term low-temperature stability and foaming. The results are shown in Tables 2 and 3. Evaluation method: (Long-term low-temperature stability) 5 ° C for each liquid detergent composition
The condition after storage for one month was visually judged and evaluated according to the following criteria. ：: Transparent liquid ×: Separation, precipitation of crystals or gelation (foaming) For each liquid detergent composition stored at 5 ° C. for one month, an aqueous solution diluted 10-fold was prepared.
Pour 00 ml (liquid temperature 5 ° C and 40 ° C) into the graduated cylinder. Next, a stirring blade was placed in the above solution, and the volume (ml) of the foam generated 30 seconds after the start of stirring was measured to determine the foaming amount.
0 to 150 ml was judged to be slightly insufficient (△), and less than 150 ml was judged to be insufficient (x). The rotation speed of the stirring blade was 1000
rpm and inverted every 5 seconds.

[0027]

[Table 2]

[0028]

[Table 3]

[0029]

Example 2 (Components) (%) (1) Phosphate potassium salt (A) 30 (2) Polyoxyethylene (3) Sodium lauryl ether sulfate 5 (3) Fragrance 0.5 (4) Ethanol 3 (5) dibutylhydroxytoluene 0.1 (6) water balance

(Preparation method) Components (1) and (2) are dissolved in heated water (6), and after cooling, components (3) to (5) are added, and a transparent liquid detergent composition (pH 7) is added. .5). When the skin and hair were washed with the obtained detergent,
It had good bubbling with low irritation and was stable even when stored for a long time at low temperature.

Claims (1)

(57) [Claims] 1. The following components (a), (b) and (c): (a) general formula (1) (Wherein, R ¹ represents a straight-chain hydrocarbon group having 5 to 12 carbon atoms, and X ¹ and X ^{2 each} represent a potassium atom or a hydrogen atom). General formula (2) (Wherein, R ² represents a straight-chain hydrocarbon group having 11 to 15 carbon atoms, and X ³ and X ^{4 each} represent a potassium atom or a hydrogen atom). a)
/ [(A) + (b)] = 3 to 60% by weight in the total amount of (a) and (b) in the range of 0.2 to 1 (weight ratio) (c) Alkyl sulfate, polyoxyethylene One or more selected from the group consisting of alkyl ether sulfates, amide amino acid salts, N-acyl-methyl taurine salts, polyoxyethylene alkyl sulfosuccinates, N-acyl-methyl-β-alanine salts, and acyl glutamates A liquid detergent composition comprising 1 to 20% by weight of a water-soluble anionic surfactant.