JPH07118695A - High-concentration neutral liquid detergent composition - Google Patents

Abstract

PURPOSE:To provide a neutral liquid detergent composition having a high concentration of 60 to 90wt.% surfactant concentration and keeping a relatively high viscosity even when diluted to a concentration for general use. CONSTITUTION:This detergent composition contains 60 to 90wt.% surfactant components composed of 10 to 50wt.% straight-chain alkylbenzenesulfonic acid ethanol amine salt and 10 to 55wt.% fatty acid alkanol amide, 5 to 15wt.% viscosity reducing agent composed of one or more kinds of ethanol, PG and PEG and a viscosity modifier composed of one or more kinds of sodium chloride, sodium sulfate and a betaine-type amphoteric surfactant in an amount of 0 to 3.5wt.% based on the surfactant components. The amounts of the viscosity reducing agent and the viscosity modifier are adjusted so as to have gamma500cP viscosity at 25 deg.C and form a diluted aqueous solution having 70 to 400cP viscosity at 25 deg.C when diluted to 15wt.% concentration of the surfactant components. A nonionic surfactant may be contained.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a neutral liquid detergent composition for dishwashing.

[0002]

2. Description of the Prior Art Neutral liquid detergents for dishwashing are roughly classified into household use and commercial use used in restaurants and the like. For household use, the surfactant concentration is 16 to 22% by weight and the viscosity is 70 to 120. While it is centipoise (at 25 ° C), most commercial products have a surfactant concentration of 10 to 20% by weight, and particularly cheap products contain 10 to 16% by weight of an alkylphenol nonionic surfactant. Recently, the biodegradability of surfactants has been emphasized, and higher alcohol type nonionic surfactants with good biodegradability have been added to make the surfactant concentration 1
A product of 5 to 22% by weight is considered as a high quality product. Viscosity is 100-400 centipoise at 25 ° C, especially 120
Mainly it is ~ 300 centipoise, and the feature is that the liquid for business use has a considerably higher viscosity than the liquid for home use to avoid overuse.

For household use, a plastic bottle of 400 to 800 ml (milliliter) or in a plastic bag recently filled with a plastic bag for reducing the amount of waste is commercially available, while for commercial use, it is 18 tons (18 liter). ) It was marketed in a can. After use, household bottles were discarded as garbage, while commercial one-can bottles were once reused or collected as iron scrap, but due to rising labor costs and falling iron scrap prices these days. Although there were empty cans, there was no handle and there was a disposal problem.

Therefore, for the purpose of reducing the amount of waste, each company that manufactures commercial cleaning agents miniaturizes the container as a high-concentration product of 30 to 50% by weight, which is about three times the normal product,
It was commercialized in a plastic container of 4 to 6 liters. However, even in this way, the situation has become difficult for users to dispose of empty plastic containers. In addition, dishwashing employees do not fully recognize that the product is a high-concentration product and use it too much, causing problems such as increased costs and rough hands.

[0005] Therefore, it was considered that while the surfactant was made to have a higher concentration, a certain amount of hot water or water was put in a dedicated plastic container (4 to 6 liters) prepared in advance at the dish washing site, and the high concentration was added to this. It is to put in the product and dissolve it to obtain a normal use concentration. In the case of household use, a certain amount of hot water or water can be placed in an empty container of hand-held kitchen detergent, and a high-concentration product can be added and dissolved therein. By such a method, the packaging material can be significantly reduced.

However, the higher the concentration of the surfactant, the higher the viscosity of the liquid. In the neutral liquid detergent for dishwashing, a water-soluble salt of linear alkylbenzene sulfonic acid, specifically sodium salt, potassium salt or ethanolamine salt is an essential surfactant component in terms of detergency and foaming. The 60% by weight aqueous solution of these anionic surfactants alone is in a paste form, and even if 10% by weight of ethanol is added, it is also in a paste form, so that the diluting work is not easy.

The viscosity at 25 ° C. is limited to 500 centipoise, preferably 400 centipoise or less, so as not to hinder the diluting work of the highly concentrated product. on the other hand,
When a highly concentrated product whose viscosity at 25 ° C is adjusted to 500 centipoise or less by adding a solvent is diluted to a normal use concentration, the viscosity becomes less than 70 centipoise, and 70-120 centipoise (25 ° C at home).
For commercial use, 100-400 centipoise (25 ° C)
In particular, consumers (housewives at home or dishwashing employees) who are accustomed to using conventional products of 120 to 300 centipoise will inevitably overuse them, resulting in problems of increased cleaning agent cost and rough hands.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, even a high-concentration product having a surfactant concentration of more than 60% by weight, the viscosity at 25 ° C. is 500 centipoise or less, and the dilution is easy.
Moreover, the viscosity of an aqueous solution diluted to a normal use concentration is the viscosity of a conventional neutral detergent for dishwashing.
It is an object of the present invention to provide a high-concentration neutral liquid detergent composition having a concentration of 0 to 400 centipoise, to reduce the amount of empty containers, and to prevent overuse and rough hands.

[0009]

The high-concentration liquid detergent composition according to the present invention comprises 10 to 50% by weight of a linear alkylbenzene sulfonic acid ethanolamine salt and 10 to 55% by weight of a fatty acid alkanolamide, and the total of these. 60 to 90% by weight of a surfactant component, 5 to 15% by weight of a viscosity reducing component consisting of at least one of ethanol, propylene glycol and polyethylene glycol, and sodium chloride, sodium sulfate and betaine type amphoteric surfactant. The viscosity modifier component consisting of at least one of the
The viscosity at 25 ° C. of an aqueous solution containing 50% by weight and having a viscosity of 500 centipoise or less at 25 ° C. and a surfactant component of 15% by weight is 70 to 400.
It is characterized in that the amount of the viscosity reducing agent and the amount of the viscosity adjusting agent are adjusted so as to obtain centipoise.

LAEA is a surfactant which has been generally used as an active ingredient of neutral liquid detergents for dishwashing, but its 60% by weight aqueous solution is a paste and is not easily diluted. Even if 10% by weight of ethanol is added to LAEA as a viscosity reducing agent, it is still in paste form.
However, LAEA combined with fatty acid alkanolamide (it is known to add a small amount as a roughening preventive to neutral liquid detergents for dishwashing) is a total of 6 surfactants.
5 wt% or more of the composition (paste alone) contains 5 to 5 parts of the thickener component consisting of at least one of ethanol, propylene glycol and polyethylene glycol.
By adding 15% by weight, the viscosity of the high-concentration stock solution at 25 ° C. becomes 500 centipoise or less, and the dilution becomes easy. Further, in such a blending system, for example, when the total concentration of the surfactant is 60% by weight, as shown in FIG. 1, the viscosity of the undiluted solution increases with the increase of the LAEA amount, but the surfactant concentration is diluted to 15% by weight. The concentration of the prepared liquid increased first with the increase of the LAEA amount and reached the maximum around 30% by weight of LAEA (30% by weight of fatty acid alkanolamide), and thereafter, the viscosity decreased with the increase of the LAEA amount.
Around 5% by weight (fatty acid alkanolamide 15
It can be seen that the viscosity of the diluted solution is higher than the viscosity of the undiluted solution up to (wt%). Also L
AEA has a viscosity of 100 in the range of 10 to 50% by weight.
It exceeds cP. The present invention has been completed based on such new findings. The amount of LAEA blended is 1
The reason for setting it to 0 to 50% by weight is that when the compounding amount is 5% by weight, the diluent becomes cloudy, and when the compounding amount is 55% by weight or more, the viscosity of the diluent becomes too low, which is not preferable. Is.

As the fatty acid alkanolamide, 1 mol of lauric acid or coconut fatty acid and 2 mol of diethanolamine are dehydrated and condensed to give a 1: 2 mol fatty acid alkanolamide or 1 mol of methyl laurate or coconut fatty acid methyl and 1 mol of diethanolamine. Methanol-condensed 1: 1 molar fatty acid alkanolamides and the like are known, but any of them can be used. The blending amount of the fatty acid alkanolamide is 10 to 55% by weight. The reason for setting the upper limit to 55% by weight is that fatty acid alkanolamide 6
This is because when 0% by weight is blended, the viscosity of the diluent becomes extremely high. The reason for setting the lower limit to 10% by weight is LAE
Using the upper limit concentration of 50% by weight of A, the total concentration of the surfactant is 6
This is a balance problem for achieving 0% by weight, and as will be described later, a secondary higher alcohol or a first alcohol having an even carbon number is used.
In the case of a blending system in which a nonionic surfactant, which is an ethylene oxide adduct of a higher alcohol selected from the group consisting of higher alcohols, is added, the fatty acid alkanolamide may be blended in an amount of 5% by weight.

Ethanol, propylene glycol, polyethylene glycol, as a viscosity reducing agent component for lowering the viscosity of the paste-form high-concentration surfactant composition to 500 centipoise or less and facilitating dilution with water at room temperature,
Alternatively, a mixture of these is used. If these are selected as the viscosity reducer and are in the range of 5 to 15% by weight, there is no fear of significantly reducing the viscosity of the diluted aqueous solution. Thickener component 15
A blending amount of not less than wt% may be possible, but it is not preferable for the purpose of increasing the concentration. In order to achieve the surfactant concentration of 90% by weight, the upper limit of the amount of the thinning agent component is 10% by weight.
The lower limit of the compounding amount is set to 5% by weight because the viscosity decrease is insufficient at 3% by weight.

In order to adjust the viscosity of the diluted solution of the high-concentration liquid detergent composition of the present invention according to the consumer's wish, the viscosity of at least one of sodium chloride, sodium sulfate and betaine-type amphoteric surfactant is used. The regulator component may be added in an amount of 0 to 3.5% by weight based on the total amount of the surfactant components.

A binary high-concentration liquid detergent composition comprising LAEA and a fatty acid alkanolamide described above is LAE.
A part of A and the fatty acid alkanolamide can be replaced with a higher alcohol nonionic surfactant.

A ternary detergent composition comprising LAEA, a higher alcohol type nonionic surfactant and a fatty acid alkanolamide having a total surfactant component content of 60 to 90% by weight means that the higher alcohol used as a raw material is (A) is a primary higher alcohol containing an odd number of carbon atoms,
Alternatively, the blending ratio differs depending on whether (B) the secondary higher alcohol and / or the primary higher alcohol having an even number of carbon atoms. In terms of the viscosity of the high-concentration liquid, the solubility, and the viscosity of the diluting liquid, (A) ethylene oxide adduct of a primary higher alcohol containing an odd number of carbon atoms is blended in an amount not more than the blending amount of the fatty acid alkanolamide. However, the amount of ethylene oxide adduct of (B) secondary higher alcohol or primary higher alcohol having an even number of carbons is 50.
Any amount can be blended with the upper limit being wt%.

A high-concentration liquid detergent composition containing a primary higher alcohol type nonionic surfactant containing an odd number of carbon atoms has a LAEA content of 10 to 50% by weight and a fatty acid alkanolamide content of 10 to 55% by weight. And a nonionic surfactant which is an ethylene oxide adduct of a primary higher alcohol containing an odd number of carbon atoms in an amount equal to or less than the fatty acid alkanolamide, and the total amount thereof is 60 to
90% by weight of a surfactant component, 5 to 15% by weight of a viscosity reducing component consisting of at least one of ethanol, propylene glycol and polyethylene glycol, and sodium chloride, sodium sulfate and betaine type amphoteric surfactant It contains 0 to 3.5% by weight of a viscosity modifier component consisting of at least one kind with respect to the total amount of the surfactant components, and the viscosity at 25 ° C. is 500 centipoise or less,
In addition, the amount of the viscosity reducing agent and the amount of the viscosity adjusting agent are adjusted so that the viscosity of the aqueous solution diluted to have a surfactant component of 15% by weight becomes 70 to 400 centipoise at 25 ° C.

A high-concentration liquid detergent composition in the case of using a secondary higher alcohol and / or a primary higher alcohol type nonionic surfactant having an even number of carbons is LAEA1.
0 to 50% by weight, fatty acid alkanolamide 5 to 55% by weight, secondary higher alcohol and first carbon number of even number
A nonionic surfactant, which is an ethylene oxide adduct of a higher alcohol selected from the group consisting of higher alcohols, in an amount of 50% by weight or less, and the total amount thereof is 60 to 9
0% by weight of a surfactant component and 5 to 15% by weight of a viscosity reducing component consisting of at least one of ethanol, propylene glycol and polyethylene glycol, and sodium chloride, sodium sulfate and betaine type amphoteric surfactant Containing at least one type of viscosity modifier component in an amount of 0 to 3.5% by weight based on the total amount of the surfactant component,
The amount of the viscosity reducer and the amount of the viscosity modifier were adjusted so that the viscosity at 25 ° C. was 500 centipoise or less and the viscosity of the aqueous solution diluted to 15% by weight of the surfactant component was 70 to 400 centipoise at 25 ° C. It is characterized by being adjusted.

As the nonionic surfactant, (A) an ethylene oxide adduct of a primary higher alcohol containing an odd number of carbon atoms, and (B) a secondary higher alcohol or a primary higher grade of an even carbon number. It is also possible to use a mixture of alcohol ethylene oxide adducts. In that case, the above-mentioned compounding conditions may be satisfied for each of them.

The nonionic surfactant, which is an ethylene oxide adduct of a higher alcohol, preferably has 5 to 10 mol of ethylene oxide added. If it is 5 mol or less, the liquid tends to be turbid, and if it is 12 mol or more, the product is solidified at room temperature and is inconvenient to handle, which is not preferable. When different numbers of moles of ethylene oxide adducts are mixed and used, the average number of moles of addition may be within the above range, and it can be selected within the common sense of those skilled in the art.

The high-concentration neutral liquid detergent composition of the present invention has a surfactant concentration of 60 to 90% by weight, and therefore has a concentration of 4 to 6
It can be used by diluting it twice or more. For example, when a dedicated plastic container of 4 to 6 liters is prepared in advance at the dishwashing site as described above, the stock solution of high-concentration detergent for dilution may be about 0.6 to 1 liter. It can be a plastic container, a plastic bag type container or a paper pack type container, and the waste can be significantly reduced.

Although the commercial cleaning agent has been described above as an example, the high-concentration neutral liquid cleaning composition of the present invention can also be used as a household dishwashing cleaning agent and is discarded as household waste plastic. It is also effective for reducing container weight.

In the high-concentration neutral liquid detergent composition of the present invention,
Antiseptics, colorants, which are added to ordinary liquid detergent compositions,
Addition of perfume etc. is free.

Based on the basic knowledge disclosed by the present invention and the specific knowledge shown in various examples as described above, a high-concentration neutral liquid detergent composition meeting market and customer demands can be prepared. It can be designed arbitrarily.

The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples. The viscosity of the diluted solution was measured with the surfactant component being 15% by weight. This is because most commercial dishwashing detergents currently on the market have a concentration of 13 to 18 for higher alcohols.
Since it is wt%, it can be used as an intermediate concentration and JI
It is determined because the S standard is 15% by weight or more. All viscosity measurements were performed at 25 ° C.

[0025]

Examples 1 to 3 and Comparative Examples 1 to 3 Tables showing linear alkylbenzene sulfonic acid ethanolamine salt (LAEA: manufactured by Lion Co., Ltd.) and fatty acid alkanolamides (manufactured by Kawaken Fine Chemical Co., Ltd .; trade name: Amizole FDE) A high-concentration neutral liquid detergent composition (stock solution) having the composition shown in 1 and a surfactant concentration of 60% by weight was prepared, and the viscosity and properties of the stock solution and the stock solution were diluted with water to obtain a surfactant concentration of 15% by weight. The results of measuring the viscosity and properties of the diluted solution are shown in Table 1. When LAEA is in the range of 10 to 50% by weight (fatty acid alkanolamide 50 to 10% by weight) and 10% by weight of ethanol is blended as a viscosity reducing agent (Examples 1, 2,
3), the viscosity of the stock solution is 5 regardless of the amount of LAEA compounded.
The viscosity of the diluted aqueous solution is 100 to 400 or less
Although it was in the range of cP, the stock solutions without the addition of the viscosity reducing agent (Comparative Examples 1, 2, 3) were in paste form and were difficult to dilute. In addition, in the comparative examples in the table, items marked with “X” indicate that the requirements specified in the present invention are not satisfied.

[0026]

[Table 1]

Based on the data shown in Table 1, the viscosity of the undiluted solution and the diluted solution of the LAEA / fatty acid alkanolamide binary system (surfactant concentration 60% by weight) added with 10% by weight of ethanol is shown in FIG. The viscosity of the stock solution is LAEA
Although it increases with the increase of the amount, the concentration of the diluent first rises with the increase of the LAEA amount and reaches the maximum around 30 wt% of LAEA, and then the viscosity decreases with the increase of the LAEA amount, until it exceeds 45 wt% of LAEA. Shows that the viscosity of the diluted solution is higher than the viscosity of the undiluted solution. Further, the viscosity of the diluted solution exceeds 100 cP in the range of 10 to 50% by weight of LAEA. Such a new finding, and a new finding that the above tendency is inherently maintained even if LAEA and a part of the fatty acid alkanolamide are replaced with a higher alcohol nonionic surfactant (see Examples below) On the basis of the above, it is possible to prepare a high-concentration neutral liquid detergent composition which has a low viscosity even at a high concentration, is easy to dilute, and has a viscosity of a diluting solution which is comparable to that of a conventional product and does not change usability. Further, when a nonionic surfactant is blended, in order to utilize the inversion phenomenon of the viscosity of the stock solution and the viscosity of the diluent shown in FIG. 1, the blending amount of the fatty acid alkanolamide is 15 to 45% by weight, particularly 20 to 40% by weight. Ranges are expected to be preferred.

[0028]

[Comparative Examples 4 to 5 and Reference Examples 1 to 4] 5% by weight of LAEA
For Comparative Example 4 and 55% by weight (Comparative Example 5), a stock solution having the composition shown in Table 2 and a surfactant concentration of 60% by weight was prepared, and the results of measuring the viscosity and properties of the stock solution and the diluted solution are shown. 2 shows. Since 10 wt% of ethanol was added, the properties and solubility of the stock solution were good, but LAEA was 5
If the weight% of the diluent is cloudy, and if the LAEA is 55% by weight, the viscosity of the diluent becomes too low, which is not preferable. For reference, 60 wt% liquid of LAEA only (Reference Example 1), 60 wt% LAEA + 10 wt% ethanol (Reference Example 2), 60 wt% of fatty acid alkanolamide only (Reference Example 3), 60 wt% of fatty acid alkanolamide %
Table 2 shows the viscosities of + ethanol 10% by weight liquid (Reference Example 4). Not only when LAEA is used alone (Reference Example 1), but also when 10 wt% of ethanol is added (Reference Example 2), LAEA is used.
Is a paste. On the other hand, when only the fatty acid alkanolamide is 60% by weight (Reference Example 3), the stock solution becomes cloudy and the diluted solution becomes cloudy, and the fatty acid alkanolamide + ethanol 10
The diluting liquid becomes cloudy in the wt% liquid (Reference Example 4).

[0029]

[Table 2]

[0030]

Examples 4 to 5 and Comparative Examples 6 to 9 In order to further increase the concentration, LAEA and a fatty acid alkanolamide (trade name: Amizole FDE or Amizol CD: manufactured by Kawaken Fine Chemicals Co., Ltd.) were used, and the composition shown in Table 3 was obtained. A stock solution having a surfactant concentration of 90% by weight was prepared, and the viscosity and properties of the stock solution and the diluted solution were measured. The results are shown in Table 3. From Example 4,
Fatty acid alkanolamide 55% by weight (remaining LAEA)
It can be seen that the viscosity of the undiluted solution and the diluted solution are within the desired range when the thickening agent component is added, but the viscosity of the diluted solution becomes too high when the fatty acid alkanolamide is 60% by weight (Comparative Example 8). That is, the upper limit of the amount of the fatty acid alkanolamide compounded is 55% by weight. Also, from Example 5, LAEA5
It can be understood that the viscosity of the undiluted solution and the diluted solution is within the desired range when the thinning agent component is blended up to 0% by weight, but turbidity occurs in the undiluted solution with 55% by weight of LAEA (Comparative Example 9), which is not preferable. Similar to the case where the surfactant concentration was 60% by weight, the stock solutions without the addition of the thinning agent (Comparative Examples 6 and 7) were in paste form and were difficult to dilute.

[0031]

[Table 3]

[0032]

Examples 6 to 9 and Comparative Examples 10 to 11 A primary higher alcohol (oxo alcohol; manufactured by Shell Chemical Co., Ltd.) containing LAEA, a fatty acid alkanolamide and a viscosity reducing agent, and further containing an odd number of carbon atoms. : Trade name Dovanol: Nonionic surfactant (trade name: Nonidet LE-6T, LE-8, manufactured by Shell Chemical Co., Ltd.), which is an ethylene oxide adduct of C ₉ , C ₁₀ , C ₁₁ mixed synthetic alcohol.
T) was added to prepare a stock solution of the high-concentration liquid detergent composition having the composition shown in Table 4, and the viscosity and properties of the stock solution and the diluted solution were measured. It should be noted that the amount of the nonionic surfactant, which is an ethylene oxide adduct of a primary higher alcohol containing an odd number of carbon atoms, should be less than the amount of the fatty acid alkanolamide (Example 6, 7,8,9) and when the amount of fatty acid alkanolamide or more is blended (Comparative Examples 10, 11)
Makes the viscosity of the diluent significantly lower. Surfactant concentration 90
When LAEA is 10% by weight, which is the upper limit value, the upper limit of the primary higher alcohol ethylene oxide adduct containing an odd number of carbon atoms is 40% by weight, which is the same as the fatty acid alkanolamide (Example 9). Becomes

[0033]

[Table 4]

[0034]

Examples 10 to 14 and Comparative Example 12 A system comprising LAEA, a fatty acid alkanolamide and a viscosity reducing agent, and a nonionic surfactant (ethylene oxide adduct of secondary higher alcohol (manufactured by Nippon Shokubai Co., Ltd.)) Lion Co., Ltd .: Leocall SC-50, SC-70, SC-9
0) was added to prepare a stock solution of the high-concentration liquid detergent composition having the composition shown in Table 5, and the results of measuring the viscosity and properties of the stock solution and the diluted solution are shown in Table 5. When the nonionic surfactant is an ethylene oxide adduct of a secondary higher alcohol, 50% by weight of the nonionic surfactant is blended regardless of the blending amount of the fatty acid alkanolamide (Example 1
0, 11), the viscosity of the undiluted solution is 500 cP or less and the viscosity of the dilute aqueous solution is in the range of 100 to 400 cP. It is also understood that when the nonionic surfactant is an ethylene oxide adduct of a secondary higher alcohol, the compounding amount of the fatty acid alkanolamide may be 5% by weight (Example 12). In the case of containing 30% by weight of fatty acid alkanolamide (Example 13), an inversion phenomenon between the viscosity of the undiluted solution and the viscosity of the diluted solution was observed. Even in the nonionic surfactant blending system, when the thickener component was not added (Comparative Example 12), the high-concentration stock solution was a paste, but when the thickener component was added to the same surfactant composition (implementation). The stock solution viscosity of Example 14) was 210 cP.

[0035]

[Table 5]

[0036]

Examples 14 to 18 Stock solutions of high-concentration liquid detergent compositions having the compositions shown in Table 6 were prepared by changing the types of fatty acid alkanolamides, and the viscosity and properties of the stock solutions and diluted solutions were measured. Show. Regardless of the type of fatty acid alkanolamide (Examples 15, 16, 17, 18, 19),
The stock solution has a viscosity of 500 cP or less, and the diluted aqueous solution has a viscosity of 100 to 400 cP. Amizor FD
(1 mol of coconut fatty acid and 2 mol of diethanolamine were heated and dehydrated while stirring under a nitrogen stream to be condensed by condensation with 1: 2 mol type fatty acid alkanolamide, Amizol CD was 1 mol of coconut fatty acid and 2 mol of diethanolamine stirred under a nitrogen stream. While heating and dehydration-condensing 1: 2 mol type fatty acid alkanolamide and amizole FDE (1 mol of coconut fatty acid methyl and 1 mol of diethanolamine were heated with stirring under a nitrogen stream to perform demethanol condensation 1:
1 mol fatty acid alkanolamide, amizole CDE
(It is a 1: 1 mol type fatty acid alkanolamide obtained by heating 1 mol of coconut fatty acid methyl and 1 mol of diethanolamine while stirring under a nitrogen stream to perform demethanol condensation.

[0037]

[Table 6]

[0038]

[Examples 20 to 25] A system comprising LAEA, a fatty acid alkanolamide, and a viscosity reducing agent was used, and the first carbon number was even.
Ethylene oxide adducts of higher alcohols, ie C
Nonionic surfactant which is an ethylene oxide adduct of ₁₂ + C ₁₄ palm alcohol (Nonidet 1265-8 manufactured by Shell Chemical Co., Ltd.) or nonionic surfactant which is an ethylene oxide adduct of C ₁₂ palm alcohol (manufactured by Sanyo Kasei Co., Ltd .: Emulmin NL-70, NL-90) was added to prepare a stock solution of a high-concentration liquid detergent composition having the composition shown in Table 7, and the results of measuring the viscosity and properties of the stock solution and the diluted solution are shown in Table 7. When the nonionic surfactant is an ethylene oxide adduct of a primary higher alcohol having an even number of carbon atoms (Examples 21 and 22), it is the same as the case of an ethylene oxide adduct of a secondary higher alcohol (Example 20). To
Even if the amount of the fatty acid alkanolamide is larger than that of the fatty acid alkanolamide, the viscosity of the undiluted solution is 500 cP or less and the viscosity of the diluted aqueous solution is in the range of 100 to 400 cP. When the nonionic surfactant is an ethylene oxide adduct of a primary higher alcohol having an even number of carbon atoms, the compounding amount of the fatty acid alkanolamide is 5% by weight as in the case of the ethylene oxide adduct of a secondary higher alcohol. % (Example 23)
However, it can be seen that the amount may be 50% by weight (Example 24).

[0039]

[Table 7]

[0040]

[Reference Examples 5 to 7] For reference, the results of measuring the viscosity and properties of the high-concentration stock solution containing only the nonionic surfactant and the diluted solution are shown in Table 8. If the surfactant is a nonionic surfactant alone, the viscosity of the diluted solution will be 10 cP or less.

[0041]

[Table 8]

[0042]

Examples 25 to 28, Comparative Examples 13 to 14 Table 9 shows the results of examining the type and amount of the thinning agent, which is one of the constituent elements of the present invention. LAEA 10% by weight, fatty acid alkanolamide (Amizole FDE) 20% by weight and nonionic surfactant 30% by weight (total 6 surfactant components)
(0% by weight), no thickener was added (Comparative Example 13) and 3% by weight of ethanol was used as a thickener (Comparative Example 14), the high-concentration composition (stock solution) was paste-like. However, ethanol was used as a viscosity reducing agent.
In the case of blending 10% by weight (Example 25) and 10% by weight (Example 26), and in the case of blending 10% by weight of propylene glycol as a viscosity reducing agent (Example 27).
When 10% by weight of polyethylene glycol (ethylene oxide addition number 200) was blended (Example 28), the viscosity of the undiluted solution was 500 cP or less and the viscosity of the diluted aqueous solution was in the range of 100 to 400 cP. From the data shown in Table 9, it is judged that it is possible to blend a thickener in an amount of more than 10% by weight, for example, 15% by weight. Since it is against the purpose of increasing the concentration, the upper limit is preferably 10% by weight.

[0043]

[Table 9]

[0044]

Examples 29 to 30 and Comparative Example 15 Table 10 shows the results of an examination of the amount of the thinning agent used when the surfactant had a higher concentration (84% by weight). When 3% by weight of ethanol is added as a viscosity reducing agent to a composition comprising 24% by weight of LAEA, 30% by weight of fatty acid alkanolamide (Amizole FDE) and 30% by weight of nonionic surfactant (total of 84% by weight of surfactant components). In Comparative Example 15), the viscosity of the high-concentration composition (stock solution) was 4500 cP and it was not easy to dilute, whereas the composition containing 5% by weight of the thinning agent (Example 29) and the composition containing 10% by weight. In each of (Example 30), the viscosity of the stock solution was 500 cP or less, and the viscosity of the diluted aqueous solution was in the range of 100 to 400 cP. Table 10
From the data shown, more than 10% by weight of the thickener,
For example, it is considered possible to add 15% by weight, but since adding a large amount of a thinning agent is contrary to the purpose of increasing the concentration of the surfactant, the upper limit is preferably 10% by weight. .

[0045]

[Table 10]

From the results shown in Tables 9 and 10, at least one of ethanol, propylene glycol and polyethylene glycol can be used as a thickener component, and the compounding amount thereof is 5 to 15% by weight, preferably 5 to 10%.
It turns out that it is suitable to set it as the weight%.

[0047]

Example 31 Concentration of surfactant having the composition shown in Table 11 60
Sodium chloride, sodium sulfate or betaine type amphoteric surfactant as a viscosity modifier in 1% by weight or 2% by weight of the stock solutions A, B and C (based on the total amount of the surfactant components of 60% by weight). 1.67% by weight or 3.33% by weight) and the viscosity of the solution diluted with a surfactant concentration of 15% by weight is shown in Table 11 and FIGS. When the viscosity of undiluted liquid such as Diluting liquid C is low, the viscosity is increased by adding them, and when the viscosity of undiluted liquid such as Diluting liquid A is high, the viscosity is lowered by adding them. However, the diluted liquid B having the intermediate viscosity exhibits a complicated behavior that the viscosity once rises and then decreases according to the addition amount, but it has the effect of adjusting the viscosity of the diluted liquid to an appropriate range as an overall tendency. I understand.

[0048]

[Table 11]

From the results shown in Table 11, at least one of sodium chloride, sodium sulfate and betaine-type amphoteric surfactant can be used as a viscosity modifier component, and its blending amount is based on the total amount of the surfactant components. It can be seen that it is suitable to set it to 0 to 3.5% by weight.

[0050]

[Examples 32 and 33] With respect to the two high-concentration compositions, the results of measuring the viscosities of the diluted solutions when the dilution ratio was changed are shown in Table 1.
2 shows. 36% by weight of LAEA, 21% by weight of fatty acid alkanolamide and 24% by weight of nonionic surfactant (total of 81% by weight of surfactant components), 9% by weight of thinning component and 1.2% by weight of viscosity controlling component (the rest is water). ) Containing formulation (Example 32) has a stock solution viscosity of 350 cP and 500
Below cP, the surfactant concentration is 15% by weight, 16% by weight,
The viscosities of the diluting solutions at 20% by weight are 165 cP and
190cP, 140cP, both 100-400c
It was in the P range. On the other hand, LAEA 24% by weight, fatty acid alkanolamide 30% by weight and nonionic surfactant 3
The stock solution viscosity of the formulation (Example 33) containing 0% by weight (total of 84% by weight of the surfactant components) and 5% by weight of the thickener component was 157 cP, while the concentration of the surfactant was 15% by weight, It is worth noting that the viscosities of the diluted solutions of 20% by weight and 25% by weight are 174 cP, 230 cP and 180 cP, respectively, which are higher than those of the stock solution.

[0051]

[Table 12]

Table 13 shows a list of raw materials used in Examples and Comparative Examples.

[0053]

[Table 13]

As described above, based on the basic knowledge disclosed by the present invention and the specific knowledge shown in various examples, a high-concentration neutral liquid detergent composition meeting the market and customer's request is prepared. It can be designed arbitrarily.

[0055]

[Effects of the Invention] Even if the concentration of the surfactant is as high as 60% by weight or more, the viscosity at 25 ° C (room temperature) is 500 centipoise or less, and the concentration of the surfactant component which is usually used is 15% by weight. Even if it is a diluted aqueous solution, the viscosity at 25 ° C is 70 to 400 centipoise, and the viscosity of the dishwashing detergent that the user is accustomed to is maintained to prevent overuse and rough hands, and make the product packaging compact. Thus, a high-concentration liquid detergent composition capable of reducing the amount of empty containers can be obtained.

[Brief description of drawings]

FIG. 1 shows a stock solution of a LAEA / fatty acid alkanolamide binary high-concentration neutral liquid detergent composition containing 60% by weight of a surfactant added with 10% by weight of ethanol.
It is a figure which shows the viscosity change of the undiluted | stock solution and the liquid which diluted the surfactant concentration 15 weight% with the change of AEA concentration.

FIG. 2 is a stock solution A having a surfactant concentration of 60% by weight and having a composition shown in Table 11, and sodium chloride, sodium sulfate or a betaine-type amphoteric surfactant as a viscosity adjusting agent in the stock solution at 1% by weight or 2% by weight. It is a figure which shows the viscosity of the liquid which added the liquid (1.67 weight% or 3.33 weight% with respect to 60 weight% of surfactant components) to the surfactant concentration of 15 weight%.

FIG. 3 is a stock solution B having the composition shown in Table 11 and having a surfactant concentration of 60% by weight, and 1% by weight or 2% by weight of sodium chloride, sodium sulfate or a betaine-type amphoteric surfactant as a viscosity modifier. It is a figure which shows the viscosity of the liquid which added the liquid (1.67 weight% or 3.33 weight% with respect to 60 weight% of surfactant components) to the surfactant concentration of 15 weight%.

FIG. 4 is a stock solution C having the composition shown in Table 11 and a surfactant concentration of 60% by weight, and sodium chloride, sodium sulfate or a betaine-type amphoteric surfactant as a viscosity adjusting agent in the stock solution at 1% by weight or 2% by weight. It is a figure which shows the viscosity of the liquid which added the liquid (1.67 weight% or 3.33 weight% with respect to 60 weight% of surfactant components) to the surfactant concentration of 15 weight%.

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Claims (4)

[Claims] 1. A linear alkylbenzene sulfonic acid ethanolamine salt of 10 to 50% by weight and a fatty acid alkanolamide of 10 to 55% by weight, and the total of these is 6%.
0 to 90% by weight of a surfactant component, 5 to 15% by weight of a viscosity reducing component consisting of at least one of ethanol, propylene glycol and polyethylene glycol, and sodium chloride, sodium sulfate and betaine type amphoteric surfactant. 0 to 3.5% by weight based on the total amount of the surfactant components, the viscosity adjusting component consisting of at least one of the above, the viscosity at 25 ° C. is 500 centipoise or less, and the surfactant component is 15% by weight. A high-concentration liquid detergent composition, wherein the amount of the thinning agent and the amount of the viscosity adjusting agent are adjusted so that the viscosity of an aqueous solution diluted so as to be at 25 ° C. is 70 to 400 centipoise. 2. Ethanol, a primary higher alcohol containing 10 to 50% by weight of a linear alkylbenzene sulfonic acid ethanolamine salt, 10 to 55% by weight of a fatty acid alkanolamide, and an amount of a fatty acid alkanolamide or less of an odd number of carbon atoms. 5 to 15% by weight of a surfactant component which is a nonionic surfactant which is an oxide adduct and whose total is 60 to 90% by weight, and a viscosity reducing component which is at least one of ethanol, propylene glycol and polyethylene glycol. %, And a viscosity modifier component consisting of at least one of sodium chloride, sodium sulfate, and betaine-type amphoteric surfactants in an amount of 0 to 3.5% by weight based on the total amount of the surfactant components, and the viscosity at 25 ° C. Is less than 500 centipoise and the surfactant component is 15% by weight. A highly concentrated liquid detergent composition, wherein the amount of the thinning agent and the amount of the viscosity modifier are adjusted so that the viscosity of the thus diluted aqueous solution at 25 ° C. is 70 to 400 centipoise. 3. A linear alkylbenzene sulfonic acid ethanolamine salt 10 to 50% by weight, a fatty acid alkanolamide 5 to 55% by weight, a secondary higher alcohol and a primary higher alcohol having an even number of carbon atoms. Nonionic surfactant, which is an ethylene oxide adduct of a higher alcohol, comprising 50% by weight or less and a total of 60 to 90% by weight of a surfactant component, and at least one of ethanol, propylene glycol and polyethylene glycol. A viscosity modifier component consisting of 5 to 15% by weight of a viscosity reducer component and at least one of sodium chloride, sodium sulfate and a betaine-type amphoteric surfactant is contained in an amount of 0 to 3.5 with respect to the total amount of the surfactant components.
The viscosity at 25 ° C. of an aqueous solution containing 50% by weight and having a viscosity of 500 centipoise or less at 25 ° C. and a surfactant component of 15% by weight is 70 to 400.
A high-concentration liquid detergent composition, characterized in that the amount of a thinning agent and the amount of a viscosity modifier are adjusted so as to be centipoise. 4. Ethylene, a primary higher alcohol containing 10 to 50% by weight of a linear alkylbenzene sulfonic acid ethanolamine salt, 10 to 55% by weight of a fatty acid alkanolamide, and an odd number of carbon atoms in an amount equal to or less than the fatty acid alkanolamide. Oxide adduct and second less than 50% by weight
A nonionic surfactant which is a mixture of an ethylene oxide adduct of a higher alcohol selected from the group consisting of a higher alcohol and a primary higher alcohol having an even number of carbon atoms, and the total amount of these surfactants is 60 to 90% by weight. Viscosity adjustment consisting of 5 to 15% by weight of a thickener component consisting of an agent component and at least one of ethanol, propylene glycol and polyethylene glycol, and at least one of sodium chloride, sodium sulfate and betaine-type amphoteric surfactant The composition contains 0 to 3.5% by weight of the total amount of the surfactant components, has a viscosity at 25 ° C. of 500 centipoise or less, and contains 1 surfactant component.
A high-concentration liquid detergent composition, characterized in that the amount of the thinning agent and the amount of the viscosity modifier are adjusted so that the viscosity of the aqueous solution diluted to 5% by weight becomes 70 to 400 centipoise at 25 ° C. object.