JPS61296099A - Layer separation type liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a layer-separated liquid cleaning composition having excellent foaming performance and storage stability.

[Prior art]

Conventionally, in order to improve the storage stability of individual ingredients in shampoos and detergents, so-called separation type products have been developed that separate the ingredients into two layers so that they do not mix when left standing. There is. Examples of such substances include higher alcohol esters of 2-ethylhexylic acid (Japanese Patent Publication No. 51-183), olive oil and squalane (Japanese Patent Application Laid-open No. 48-58007,
-10360), liquid paraffin and almond oil (JP-A-54-24908, JP-A-54-2)
5906) containing oily substances are known. When using these separate liquid detergent compositions, the two layers are mixed by shaking gently, but when the composition is left still, the oily substance is separated and its storage stability is improved.

However, since these separate compositions contain a large amount of the above-mentioned oily substances, they foam extremely poorly and are not suitable as cleaning agents.

On the other hand, a two-layer separation type shampoo containing sodium hexametaphosphate and utilizing salting out is also known (European Patent No. 116422). Although this shampoo lathers well, it has the disadvantage that its separation properties gradually deteriorate each time it is shaken. That is, a cloudy white layer was formed near the interface between the upper layer and the lower layer, and the separated state could not be said to be beautiful in terms of appearance.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a layer-separable liquid detergent composition that has excellent foaming performance and storage stability and that consistently separates the layers clearly and beautifully even after repeated shaking.

[Means to solve the problem]

The layer-separated liquid cleaning composition of the present invention comprises at least one anionic surfactant selected from -lyoxyalkyl ether sulfates and alkanesulfonates, an alkanolamide, and 5 to 25% by weight of condensed phosphorus. containing an acid salt, and the weight ratio of the anionic surfactant and alkanolamide (surfactant/alkanolamide) is 10/1 to
It is characterized by being 2/1.

〔Effect of the invention〕

The above-mentioned layer-separated liquid detergent composition of the present invention has excellent foaming properties because it does not rely on layer separation due to oil content.

Furthermore, even after repeated shaking during use, the layers always separate clearly and beautifully, and no cloudy layer is formed near the interface. Therefore, it can be said to have excellent appearance and high commercial value.

[Detailed description of the invention]

Hereinafter, the layer-separated liquid cleaning composition of the present invention will be explained in detail.

Among the anionic surfactants that are the first essential component of the composition of the present invention, various types of I-lyoxyethylene alkyl ether sulfate can be used, but in particular, the following general formula (1) The one shown is preferred.

R(OC2H4)tO803M Song times・(1)(
However, R has an average carbon number of 8 to 18, preferably 10 to 14
is an alkyl group with an average value of 1 to 10. (The number is preferably 1 to 5, and M represents an alkali metal ion, an alkanolamine ion, or an alkaline earth metal ion.) Specific examples of the compound represented by this general formula (1) include natural lauryl alcohol polyoxy ethylene(
n=3) sulfate ester, oxo method synthesized C11-C15 aliphatic alcohol polyoxyethylene (n=3) sulfate ester, oxo method synthesized C42-C13 aliphatic alcohol oxyethylene sulfate, C42-C13 aliphatic alcohol sulfate ester, and Examples include those in which the sulfuric ester moiety is a sodium salt, potassium salt, or alkanolamine salt of sulfuric acid. Among these, sodium polyoxyethylene lauryl ether sulfate (n=3) is particularly preferred. In addition, in the present invention, one of these compounds may be used alone, or two
You may use more than one species in combination.

On the other hand, other anionic surfactants such as alkanesulfonates have an average carbon number of 10 to 18, preferably 14.
Alkali metal or alkaline earth metal salts of alkanesulfonates of ~18 can be used. These alkanesulfonates are, for example, alkanesulfonates having 10 to 18 carbon atoms.
It can be obtained by subjecting the mother rough-in to sulfoxide to give an alkanesulfonic acid, and then neutralizing this with an alkali.

The alkanolamide, which is the second essential component of the composition of the present invention, is prepared using fatty acid methyl or fatty acid ethyl ester as a starting material, and without using a catalyst.
℃ heating for a relatively short period of time, a method of reacting the above starting materials using an alkali metal or its hydroxide or its alcolade as a catalyst, and then separating or neutralizing this, or bicarbonate). It is possible to use those produced by a method using a catalyst as follows. In particular, an alkanolamide represented by the following general formula (3) is preferably used.

■n (However, R' has an average carbon number of 6 to 16, preferably 10 to
14 alkyl group, m is 1 or 2, m +
n = 2. ) Specifically, a condensate of higher fatty acids such as coconut fatty acid, lauric acid, and stearic acid and jetanolamine can be mentioned, and one or more of these can be used.
Among these, coconut fatty acid jetanolamide is preferred.

As an example of the condensed phosphate which is the third essential component of the composition of the present invention, those produced by heating and dehydrating a mixture of sodium phosphate or orthophosphoric acid and caustic soda can be used.

Particularly preferred is one represented by the following general formula (4).

(NaPO,)n ・・・・・・・・・(4)
(However, n represents a number of 3 or more.) Specific examples of the compound represented by formula (4) include sodium trimetaphosphate, sodium tetrametaphosphate, sodium hexametaphosphate, and Graham's salt. These compounds may be used alone or in combination of two or more.

As another example of the condensed phosphate, sodium polyphosphate represented by the following general formula (5) is used.

Na PO・・・・・・・・・(5)1+2
n 3l-N (However, n represents a number of 3 or more.) Specific examples of the compound represented by formula (5) include sodium tripolyphosphate and sodium tetrapolyphosphate. These compounds may be used alone or in combination of two or more.

In addition to containing the three essential components described above, the layer-separated liquid cleaning composition of the present invention has a weight ratio of anionic surfactant to alkanolamide (anionic surfactant/alkanolamide) of 10. /1 to 2/1, preferably 5/1 to 3/1, and the amount of condensed phosphate is 5 to 25% by weight, preferably 10 to 2% by weight of the entire composition.
It is necessary to set it to 0% by weight. If the weight ratio exceeds 10/1, the separability will deteriorate and a clear boundary between the upper layer and the lower layer will not appear. On the other hand, if it is less than 2l1, the separability is good, but the upper layer or lower layer does not become transparent, which is not preferable.

If the amount of condensed phosphate is less than 5% by weight, layer separation will not occur,
If it exceeds 25% by weight, storage stability is poor and cloudiness occurs at low or high temperatures, making it impossible to achieve the object of the present invention.

The cleaning composition of the present invention may contain conventionally commonly used auxiliary additives as necessary depending on its type, purpose of use, etc. Examples of such additives include salt, mirabilite, solubilizers, BHT, antioxidants such as α-tocopherol, ultraviolet absorbers, protein derivatives, animal and plant extracts, fungicides, pigments, fragrances, and cationic polymers. Conditioning agents such as

Furthermore, for the purpose of adjusting detergency and foaming, other types of anionic surfactants, nonionic surfactants, and amphoteric surfactants may be added to the extent that they do not impede the separability. In this case, these other types of surfactants include, for example, α-olefin sulfonate, higher alcohol sulfate ester salt, polyoxyethylene higher alcohol phosphate ester or salt thereof, polyoxyethylene higher fatty acid ester or salt thereof, Examples include N-acyl acidic amino acid salts or basic amino acid salts, amine oxides, ethylene oxide adducts of alcohols and alkylphenols, sugar alcohol fatty acid esters, carboxybetaine, and sulfobetaine. These surfactants can be used alone or in combination of two or more.

The layer-separable liquid detergent composition of the present invention can be widely used as a liquid detergent such as kitchen detergent, laundry detergent, shampoo, and the like.

EXAMPLES Hereinafter, the effects of the present invention will be explained in more detail by showing examples and comparative examples of the present invention. In addition, the amount of each component is weight%
It is.

Before explaining each side, we will explain the test methods adopted by each side.

(1) 2Qml of a 6ml aqueous solution of a detergent composition with adjusted foaming power (25℃
) was collected in a 100-proof cylinder, 0.2 g of liquid lanolin was added as an artificial stain, and the mixture was shaken 20 times for 10 seconds.
The foam volume (TLt) was measured after 1 minute.

(2) Separability The prepared cleaning composition was allowed to stand for about one day, and whether or not it was clearly separated into two layers was visually judged based on the following criteria.

○: Two layers are clearly separated.

△: Two layers are separated, but the interface is clear and strong.

×: Two layers are not separated.

(3) Separation Stability (Separability after Repeated Shaking) The prepared cleaning composition is placed in a transparent container, shaken up and down 10 times, and then left in a device for one day to separate into two layers. After repeating the cycle of this shaking device 10 times, whether or not a cloudy layer appeared at the interface was visually determined based on the following criteria.

○: No cloudy layer was observed, and two layers were clearly separated.

Δ: A faint cloudy layer appears.

×: A cloudy layer clearly appears.

Examples 1 to 6 Seventeen types of cleaning compositions having the formulation shown in Table 1 were prepared,
Their performance was evaluated. The results are shown in the same table. As is clear from the table, the compositions containing all three essential components of the present invention (Examples 1 to 6) all exhibit excellent performance, whereas the compositions containing all three essential components of the present invention (Comparative Examples 1 to 9) and compositions in which the third essential component is outside the scope of the present invention (Comparative Examples 10.11)
It can be seen that neither of them shows excellent performance.

-15-Examples 7 to 11 Seven types of cleaning compositions having the formulation shown in Table 2 were prepared and their performance was evaluated. The results are shown in the same table. As is clear from the same table, the performance of the compositions using a grid type strong phosphate as the third essential component (Comparative Examples 12 and 13) was inferior, whereas the compositions using a condensed phosphate Composition (Example 7
-11) all showed excellent properties.

A shampoo composition having the formulation shown in Table 3 was prepared and its performance was evaluated. The results are shown in the same table. As is clear from the table, this shampoo composition showed excellent performance.

Table 3 but polyoxy (Average EO C14-α coconut oil hexano 4th nitrification (Catio/ Polie Fungicide fragrance pigment ethane water tIil:

Claims (6)

[Claims] (1) contains at least one anionic surfactant selected from polyoxyalkyl ether sulfates and alkanesulfonates, an alkanolamide, and 5 to 25% by weight of condensed phosphate; 1. A layer-separable liquid detergent composition characterized in that the weight ratio of surfactant to alkanolamide (surfactant/alkanolamide) is 10/1 to 2/1. (2) The polyoxyalkyl ether sulfate is represented by the following general formula (1).
The layer-separated liquid cleaning composition as described in 2. R(OC_2H_4)_lSO_3M・・・・・・・・・
・(1) (However, R is an alkyl group having an average carbon number of 8 to 18,
1 is a number with an average value of 1 to 10, and M represents an alkali metal ion, an alkanolamine ion, or an alkaline earth metal ion. ) (3) The layer-separable liquid cleaning composition according to claim 1, wherein the alkanesulfonate is represented by the following general formula (2). PS-M・・・・・・(2) (However, PS is an acid group of a linear or branched alkyl sulfonate having an average carbon number of 10 to 18, and M is an alkali metal or alkaline earth metal. ) (4) The layer-separable liquid cleaning composition according to any one of claims 1 to 3, wherein the alkanolamide is represented by the following general formula (3). ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・・・・
(3) (However, R' is an alkyl group having an average carbon number of 6 to 16, m is 1 or 2, and m+n=2.) (5) The layer-separable liquid cleaning composition according to any one of claims 1 to 4, wherein the condensed phosphate is sodium metaphosphate represented by the following general formula (4). (NaPO_3)_n・・・・・・(4) (However, n indicates a number of 3 or more.) (6) The layer-separable liquid cleaning composition according to any one of claims 1 to 4, wherein the condensed phosphate is sodium polyphosphate represented by the following general formula (5). Na_n_+_2P_nO_3_n_+_1...
...(5) (However, n indicates a number of 3 or more.)