JPH10330788A - Higher-alcohol-based concentrated neutral detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high-quality neutral detergent compsn. which has a low solvent content and does not undergo gelation nor low-temp. solidification by compounding a nonionic surfactant of a polyoxyethylene alkyl ether type, an anonic surfactant, and an aliph, alkanolamide as the esential components together with a pH-adjusting agent and a solvent. SOLUTION: The nonionic surfactant of a polyoxyethylene alkyl ether type is a combination of 1-9 wt.% 2-6 (x) EO adduct to a higher alcohol with 10-30 wt.% 7-12 (y) EO adduct to a higher alcohol and is compounded in an amt. of 11-35 wt.% of the compsn. The anionic surfactant is selected form among alkylsulfuric ester salts, alkanesulfonates, etc., and is compounded in an amt. of 4-10 wt.% of the compsn. Palm oil fatty acid diethanolamide is suitable as the fatty acid alkanolamide and is compounded in an amt. of 5-33 wt.%. an example of the pH-adjusting agent is sulfuric acid. The solvent is propylene glycol and is used in an mat. of 7% or lower. The compsn. has a viscosity of 400-1,100 cP at 20 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrated alcohol-based neutral detergent composition which is excellent in transparency and stability and is economical in terms of cost.

[0002]

2. Description of the Related Art Among commercial neutral detergent compositions used as dishwashing detergents, commercial detergent compositions have a surfactant component concentration adjusted to about 10 to 15% by weight (hereinafter abbreviated as "%"). The mainstream was to fill the container with a single can (capacity 18 liters) or a plastic container. However, the cost of the single container or the plastic container is high and a recycling system cannot be established. Bag-shaped containers called "paper packs" and "standing pouches" have been widely used not only for home use but also for business use.

[0003] Although the standing pouch is made of plastic, it is relatively easy to handle because of its small amount of use, and it is compact and takes up little space for the user, and is easy to be folded and discarded. Are welcomed for convenience.

[0004]

However, since the pouch is a flexible bag, it is difficult to fill the detergent composition (liquid) and the filling speed has to be slower than a can or a plastic container. . Therefore, increasing the concentration of the surfactant component to increase productivity and reduce costs has been carried out. However, due to the growing interest in environmental issues, natural (higher alcohols), which have been growing in demand recently. In neutral detergents, if the concentration of the surfactant component is increased, gelation caused by the nonionic surfactant, which is the main component, occurs, causing a loss of transparency and a decrease in fluidity at low temperatures. There is a problem such as solidification. These phenomena tend to occur particularly when the surfactant component concentration becomes 40 to 60%.

On the other hand, a large amount (10 to 20%) of a solvent, for example, a lower alcohol such as ethanol, propylene glycol, polyethylene glycol or the like is used to eliminate gelation or solidification. However, when these solvents are blended in a large amount, there is a problem that a strong solvent smell is imparted to the product, the viscosity becomes too low, and the detergent is excessively used. In addition, the use of fragrances for masking solvent odor has also been partially implemented, but some users have higher costs or are concerned about the odor of fragrances. It has become a challenge.

Japanese Unexamined Patent Publication No. 6-240292 discloses a very high-concentration neutral detergent composition having a surfactant component concentration of 60% or more. A relatively large amount is blended, and the viscosity is adjusted by blending an amphoteric surfactant, so that the cost is high. In addition, since the concentration of the surfactant is very high, it may be difficult to dissolve in water at a low temperature such as winter.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to provide a high-quality concentrated alcohol-based concentrated neutral detergent composition which suppresses the amount of a solvent and does not cause gelation or solidification at low temperatures. The purpose is to provide.

[0008]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present invention comprises the following (A) to
A surfactant component containing the component (C) as an essential component is contained at a concentration of 30 to 55% based on the whole composition, and the following components (D) and (E) are contained.
It is a higher alcohol concentrated neutral detergent composition having a composition viscosity at 400C of 400 to 1100 cps. (A) Polyoxyethylene alkyl obtained by combining 2 to 6 moles of an ethylene oxide adduct of a higher alcohol (x) 1 to 9% and 7 to 12 moles of an ethylene oxide adduct of a higher alcohol (y) 10 to 30% Ether type nonionic surfactant 11 to 35%. (B) 4 to 10% of an anionic surfactant. (C) Fatty acid alkanolamides 5-33%. (D) a pH adjuster. And (E) a solvent component of 7% or less.

Further, the invention according to claim 2 of the present invention provides:
In the polyoxyethylene alkyl ether of the component (A), (x) and (y) are (x) :( y) = 9: 1.
4. A concentrated higher neutral alcohol-based detergent composition which is combined in a weight ratio of 6 to 1:24.
The present invention relates to a concentrated neutral detergent composition containing higher alcohols, wherein the anionic surfactant (B) is at least one of an alkyl sulfate salt (p) and an alkyl ether sulfate salt (r).

Further, in the invention according to claim 4 of the present invention, the anionic surfactant of the component (B) comprises an alkyl sulfate salt (p) and an alkyl ether sulfate salt (r), wherein (p) And (r) become (p):
(R) = 1 is a higher alcohol-based concentrated neutral detergent composition which is combined in a weight ratio of 1: 4 to 4: 1. The invention according to claim 5 of the present invention is characterized in that the pH adjustment of the component (D) is carried out. The concentrated neutral detergent composition is a higher alcohol-based concentrated detergent composition in which the agent is at least one acid selected from the group consisting of citric acid, boric acid, and sulfuric acid.

That is, the present invention uses a special polyoxyethylene alkyl ether type nonionic surfactant as the component (A) to suppress the amount of the solvent to be mixed and to suppress the gelling phenomenon and the low-temperature solidification phenomenon. To eliminate
(D) A transparent appearance is obtained by neutralization with a pH adjuster, which is a component. Even though the concentration of the surfactant component is set relatively high, very stable quality is obtained. It has good preparation and convenience. Further, since no expensive component material is used, the cost can be reduced.

Among the above components (A), in particular, a 2 to 6 mol adduct of higher alcohol with ethylene oxide (hereinafter abbreviated as “higher alcohol 2 to 6EO”),
A combination of a higher alcohol ethylene oxide 7 to 12 mol adduct (hereinafter abbreviated as "higher alcohol 7 to 12 EO") in a weight ratio of 9:16 to 1:24 is more excellent in the above effects.

Among the anionic surfactants of the above-mentioned component (B), those using at least one of an alkyl sulfate and an alkyl ether sulfate have excellent cleaning performance and mild feeling on hands. Among them, a combination of the alkyl sulfate and the alkyl ether sulfate in a weight ratio of 1: 4 to 4: 1 exhibits particularly excellent effects.

Further, among the pH adjusters of the component (D), those using at least one acid selected from the group consisting of citric acid, boric acid and sulfuric acid have a low temperature stability and a long-term pH. Excellent stability.

[0015]

Next, an embodiment of the present invention will be described.

The polyoxyethylene alkyl ether type surfactant used as the component (A) of the present invention comprises higher alcohols 2 to 6 EO (x) and higher alcohols 7 to 1
2EO (y).

The higher alcohols 2 to 6EO (x) include adducts of 2 to 6 moles of ethylene oxide of higher alcohols having 8 to 18 carbon atoms. Among them, ethylene oxide of higher alcohols having 10 to 14 carbon atoms is particularly preferred. Two
A 3 mole adduct is preferred. This composition is contained in the range of 1 to 9% with respect to the whole composition. In particular, by setting the content to 3 to 7%, particularly excellent viscosity characteristics, low-temperature stability and transparency can be obtained. Obtainable.

The higher alcohols 7 to 12 EO
Examples of (y) include 7 to 12 moles of an ethylene oxide adduct of a higher alcohol having 10 to 18 carbon atoms, and 8 to 10 moles of an ethylene oxide adduct of a higher alcohol having 10 to 14 carbon atoms are preferable. is there. This composition is contained in the range of 10 to 30% with respect to the whole composition. Particularly, by setting the content to 13 to 28%, particularly excellent viscosity characteristics, low-temperature stability, and transparency are obtained. Obtainable.

By using the above two kinds of higher alcohol ethylene oxide adducts (x) and (y) in combination, the gelation phenomenon and the low-temperature solidification phenomenon of the high-concentration surfactant component can be eliminated. In addition, the amount of the solvent to be compounded in the composition of the present invention can be reduced to a minimum. This is a major feature of the present invention. The effect cannot be obtained by only one of the above (x) and (y).

The two components (x) and (y) may be of one type or a combination of two or more types. Then, as the sum of the two components (x) + (y), 11 to 35% of the whole composition
In the proportion of If it is less than 11%, the above effect cannot be sufficiently obtained. Conversely, if it exceeds 35%, it becomes highly viscous, causing troubles during filling work, and low temperature stability is deteriorated, so that separation and layering are easily performed. Because it becomes. It is particularly preferable to combine the two at a weight ratio of (x) :( y) = 9: 16 to 1:24 from the viewpoint of low-temperature stability during storage. The above two components (x),
Both (y) are nonionic surfactants that have not been used in neutral detergents before, because they have poor detergency. In the present invention, both are balanced within a specific range. By considering and combining by specific amount,
The above-mentioned excellent effects are brought out without impairing the detergency.

The anionic surfactant which is the component (B) of the present invention includes alkyl sulfates, alkyl ether sulfates, alkane sulfonates, α
-Olefin sulfonates and the like. Examples of the alkyl sulfate include sodium lauryl sulfate, triethanolamine lauryl sulfate,
Examples thereof include ammonium lauryl sulfate, potassium lauryl sulfate, lithium lauryl sulfate, and barium lauryl sulfate. Of these, sodium lauryl sulfate is preferred. Examples of the alkyl ether sulfate include sodium polyoxyethylene alkyl ether sulfate, triethanolamine polyoxyethylene alkyl ether sulfate, ammonium polyoxyethylene alkyl ether sulfate, and the like. Sodium ether sulfate is preferred. The alkyl group has 10 carbon atoms.
~ 16, especially 12 ~ 14. Further, the number of moles of ethylene oxide added to polyoxyethylene is preferably 2 to 5, particularly preferably 2 to 3. These may be used alone or in combination of two or more. Especially,
Alkyl sulfates and alkyl ether sulfates are preferred, and when both are used in combination,
The cleaning performance and the mild feeling to the hands are further improved. The component (B) is used in an amount of 4
It is blended at a ratio of 10% to 10%. That is, if it is less than 4%, the detergency is poor, and if it exceeds 10%, the low-temperature stability is deteriorated, and at the same time, a mild feeling on the skin cannot be maintained. When the alkyl sulfate salt (p) and the alkyl ether sulfate salt (r) are combined, the weight ratio (p) :( r) of both may be set to 4: 1 to 1: 4. It is suitable. That is, when the amount of the alkyl sulfate ester (p) is larger than the above range, the skin tends to have a tight feeling after the use of the detergent composition, and when the amount of the alkyl ether sulfate salt (r) is larger than the above range. This is because there is a tendency for the skin to become sticky after use of the cleaning composition. In addition, those that do not contain an anionic surfactant,
It is easy to separate and separate layers, and turbid at low temperatures.

Further, the fatty acid alkanolamide which is the component (C) of the present invention includes coconut oil fatty acid diethanolamide, lauric acid diethanolamide, lauric acid myristic acid diethanolamide, myristic acid diethanolamide, oleic acid diethanolamide, palm kernel. Oil fatty acid diethanolamide and the like. These may be used alone or in combination of two or more. Among them, it is preferable to use coconut oil fatty acid diethanolamide in terms of storage stability, that is, in that transparency is maintained during storage and no layer separation occurs.

The above fatty acid alkanolamide is blended at a ratio of 5 to 33% with respect to the whole composition, preferably 10 to 26%, more preferably 10 to 20%.
Be blended. If the ratio is out of the above range, the composition tends to be solidified at room temperature, or the composition tends to be separated, separated and turbid over time.

The concentrated higher alcohol-based neutral detergent composition of the present invention contains the above-mentioned components (A) to (C) as essential surfactant components. Agent components can be appropriately blended. However, the concentration of the entire surfactant component including the components (A) to (C) to the composition must be set to 30 to 55%. That is, when the surfactant concentration is less than 30%, it cannot be said that there is a significant difference in concentration as compared with the conventional product, and the container cannot be made very compact. Conversely, if the surfactant concentration exceeds 55%,
This is because the composition stock solution becomes turbid and the appearance deteriorates, and no convenient viscosity characteristics can be obtained.

In the present invention, a pH adjuster is used as the component (D) together with the surfactant component.
Examples of the pH adjuster include citric acid, boric acid, sulfuric acid, hydrochloric acid, acetic acid, lactic acid, malic acid and the like, and these may be used alone or in combination of two or more. Among them, citric acid, boric acid, and sulfuric acid are particularly preferable in terms of low-temperature stability and pH stability over time.

The above-mentioned pH adjuster is to provide an acid necessary for keeping the composition neutral. That is, p
An undiluted solution of a composition not containing an H adjustor usually has a pH of 8 to 10.
Since it has a bad effect on human skin as it is, it has been conventionally used.

In the present invention, a solvent component is used as the component (E). Examples of the solvent component include lower alcohols such as ethanol, propylene glycol (PG), polyethylene glycol (PEG), and glycerin. Among them, ethanol and PG are preferable.
Is optimal.

The above-mentioned solvent component is blended at a ratio of 7% or less based on the whole composition, and it is preferable to use the solvent component within a range of 3 to 5%. That is, if the solvent component exceeds 7%, the composition may have a solvent odor, which is not preferable as a product. The solvent odor is completely eliminated at 5% or less, but if it is less than 3%, the viscosity may be too high to make it difficult to handle when the surfactant concentration is set to the upper limit of 55%.

The higher alcohol-concentrated neutral detergent composition of the present invention thus obtained has a composition viscosity at 20 ° C. of 400 to 1100 cps, and has a low viscosity despite the relatively high surfactant component concentration. Thus, the efficiency of filling the pouch or the like is not impaired. Further, handling such as dilution is easy, and uniform dilution can be achieved. In addition, the amount of the solvent component is kept low, and there is no solvent odor. In addition, the composition does not undergo a gelling phenomenon or a low-temperature solidification phenomenon, and has excellent appearance and storage stability over a long period of time.

[0030]

As described above, the concentrated higher alcohol-based neutral detergent composition of the present invention can be used for washing dishes and cooking utensils, etc.
Detergents used for washing vegetables and fruits have a surfactant component concentration of 30 to 55%, which is relatively high, but as the component (A), two special types of polyoxyethylene alkyl ethers are used. Since the non-ionic surfactant is used, a gelling phenomenon and a low-temperature solidification phenomenon do not occur, and extremely stable quality can be maintained for a long period of time. And since the compounding quantity of a solvent component can be suppressed low, the product which has no solvent odor at all can be obtained.
In addition, since the stock solution has a moderately low viscosity, it can be efficiently filled into a container such as a pouch, and the viscosity is not too low at the time of use. In addition, since an expensive component material is not used, there is an advantage that the cost can be reduced.

Among the above components (A), those obtained by combining higher alcohols 2 to 6 EO and higher alcohols higher alcohols 7 to 12 EO in a weight ratio of 9:16 to 1:24 are particularly preferred. The effect is even better.

Among the above-mentioned anionic surfactants of the component (B), those using at least one of an alkyl sulfate salt and an alkyl ether sulfate salt have excellent cleaning performance and mild feeling on hands. Among them, a combination of the alkyl sulfate and the alkyl ether sulfate in a weight ratio of 1: 4 to 4: 1 exhibits particularly excellent effects.

Further, among the pH adjusters of the component (D), those using at least one acid selected from the group consisting of citric acid, boric acid and sulfuric acid have a low temperature stability and a long-term stability of pH. Excellent stability.

Next, examples will be described together with comparative examples. In Tables 1 to 17 below, which show the compositions of Examples and Comparative Examples, the raw material was 100% pure.
In the case where less than 10% is used, the numerical value indicating the raw material composition is indicated by a pure amount.

[0035]

Examples 1 to 13 and Comparative Examples 1 to 14
(Weight basis, the same applies hereinafter) was prepared as a concentrated higher alcohol-based neutral detergent composition. The obtained composition was evaluated for the following items, and the results are shown in Tables 1 to 6 below.

[Appearance] The detergent composition was placed at room temperature (25
C.) and a low temperature (5.degree. C.) for 7 days, and the appearance was visually observed and evaluated. The evaluation criteria are as follows. ◎: Transparent, no turbidity, no separation, no separation. …: Slight turbidity is generated as a whole, but there is a sense of transparency, and separation and separation are not observed. Δ: cloudy and no transparency, but no separation and separation were observed. ×: cloudy and no transparency, layering and separation observed.

[Fluidity] 200 ml of each of the detergent compositions was placed in a 250-ml glass standard bottle, and kept in a low-temperature constant temperature bath (IN-81, manufactured by Yamato Scientific Co., Ltd.) set at 5 ° C. for 5 hours. It was taken out, tilted or turned upside down, and the fluidity was visually observed and evaluated. The evaluation criteria are as follows. ◎: There is fluidity, and no problem occurs during use. …: The fluidity is slightly inferior, but no problem occurs in use. Δ: High viscosity, poor fluidity, and difficult to handle in use. X: Loss of fluidity and cannot be solidified and handled.

[Viscosity] The viscosity at 20 ° C. was measured using a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.).

[Detergency] A test was conducted in accordance with JIS K3362 (improved leanut method). In addition, based on the cleaning power (detergent concentration 1.5%) of the JIS cleaning power determination index detergent,
The measurement was performed under the conditions of a measurement temperature of 30 ± 1 ° C. and a detergent concentration of 0.04%, and the detergency was compared and evaluated. The evaluation criteria are as follows. A: Notably excellent. ○: Somewhat excellent. Δ: equivalent. ×: Slightly inferior. XX: Inferior.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

[Table 3]

[0043]

[Table 4]

[0044]

[Table 5]

[0045]

[Table 6]

From the above results, it can be seen that all of the products of Examples 1 to 13 have excellent transparency and fluidity, and have no problem in detergency. In contrast, Comparative Examples 1-4, 6, 8-14
It can be seen that the product has problems in transparency and fluidity and has problems in handling. The products of Comparative Examples 5 and 7 had no problem in transparency and fluidity, but the detergent composition had a solvent odor due to a large mixing ratio of the solvent component, and was not preferable as a product. .

[0047]

Examples 14 to 19 As shown in Tables 7 and 8 below, the mixing ratio of the two types of polyoxyethylene alkyl ethers (x) and (y) as the component (A) was changed. Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. Then, the obtained composition was evaluated in the same manner as described above, and the results are shown in Tables 7 and 8 below.

[0048]

[Table 7]

[0049]

[Table 8]

From the above results, the two types of polyoxyethylene alkyl ethers (x) and (y)
It is understood that the compounding ratio of (x) :( y) is preferably set to 1:24 to 9:16.

[0051]

Examples 20 to 29 Next, as shown in Tables 9 and 10, the type of polyoxyethylene alkyl ether (x) in component (A) was changed. Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. Therefore, the composition below the component (B) is omitted. Then, the obtained composition was evaluated in the same manner as described above, and the results are shown in Tables 9 and 10 below.

[0052]

[Table 9]

[0053]

[Table 10]

From the above results, it can be seen that as the polyoxyethylene alkyl ether (x), those having an addition mole number of ethylene oxide of 2 to 6 can be used.

[0055]

Examples 30 to 37 Next, as shown in Tables 11 and 12, the type of the polyoxyethylene alkyl ether (y) in the component (A) was changed. Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. Therefore, the composition below the component (B) is omitted. Then, the obtained composition was evaluated in the same manner as described above, and the results are shown in Tables 11 and 12 below.

[0056]

[Table 11]

[0057]

[Table 12]

From the above results, the polyoxyethylene alkyl ether (y) has an alkyl group having 10 carbon atoms.
And the number of moles of added ethylene oxide is 7
It can be seen that those having 12 can be used.

[0059]

Examples 38 to 44 and Comparative Examples 15 and 16 Next, as shown in Tables 13 and 14, the type of the component (B) was changed. Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. And while evaluating the obtained composition in the same manner as described above,
Mild feeling on the hands was also evaluated according to the following method. The results are shown in Tables 13 and 14 below.

[Mild feeling on hands] 1g per sheet
25.5c in diameter contaminated with refined beef tallow (manufactured by NOF Corporation)
m 50 ceramic flat plates were prepared. Then, five panelists use 30 ° C. lukewarm water in which the detergent composition is dissolved to have a detergent active ingredient concentration of 0.04%.
The flat plates were washed one by one, and the feel of the hands after washing was evaluated according to the following criteria. ◎: There is no feeling of tightness and it is very refreshing. ○… Usually. △: There is a sense of tightness more than usual. ×: There is a sense of tightness and it is bulky.

[0061]

[Table 13]

[0062]

[Table 14]

From the above results, as the component (B), a combination of an alkyl sulfate salt (p) and an alkyl ether sulfate salt (r) in a weight ratio of 4: 1 to 1: 4 was obtained by hand. It is also found that the mild feeling is excellent and suitable. In contrast, Comparative Examples 15 and 16 containing no component (B) had poor transparency and fluidity,
Not practical.

[0064]

Examples 45 to 47 and Comparative Examples 17 and 18 Next, as shown in Table 15 below, the type of the component (C) was changed. Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. Then, the obtained composition was evaluated in the same manner as described above, and the results are shown in Table 15 below.

[0065]

[Table 15]

From the above results, it is understood that various fatty acid alkanolamides can be used as the component (C).

[0067]

Examples 48 to 53, Comparative Example 19 Further, Table 1 below
6, as shown in Table 17, the type of component (D) was changed.
Otherwise, the procedure of Example 3 was repeated to prepare a concentrated higher alcohol-based neutral detergent composition. Then, the obtained composition was evaluated in the same manner as described above, and the results are shown in Tables 16 and 17 below.

[0068]

[Table 16]

[0069]

[Table 17]

The above results show that various acids can be used as the component (D). In particular, it can be seen that citric acid (see Example 3), sulfuric acid, and boric acid are preferably used because transparency at a low temperature is favorably maintained.

Claims (5)

[Claims] 1. A surfactant component containing the following components (A) to (C) as essential components in a concentration of 30 to 55% by weight based on the whole composition, and the following component (D): ,
A concentrated concentrated neutral alcohol detergent composition comprising (E) a component and having a composition viscosity at 20 ° C. of 400 to 1100 cps. (A) Polyoxy obtained by combining 1 to 9% by weight of an ethylene oxide adduct (x) of 2 to 6 moles with a higher alcohol and 10 to 30% by weight of an adduct (y) of 7 to 12 moles of a higher alcohol. Ethylene alkyl ether type nonionic surfactant 11 to 35% by weight. (B) 4 to 10% by weight of an anionic surfactant. (C) 5 to 33% by weight of fatty acid alkanolamide. (D) a pH adjuster. (E) 7% by weight or less of a solvent component. 2. The polyoxyethylene alkyl ether of the component (A), wherein (x) and (y) are (x):
The higher alcohol-concentrated neutral detergent composition according to claim 1, which is combined in a weight ratio of (y) = 9: 16 to 1:24. 3. The method according to claim 1, wherein the anionic surfactant (B) comprises at least one of an alkyl sulfate salt (p) and an alkyl ether sulfate salt (r). Detergent composition. 4. The anionic surfactant of component (B) comprises an alkyl sulfate salt (p) and an alkyl ether sulfate salt (r), wherein (p) and (r)
The concentrated neutral detergent composition according to claim 3, wherein (p) :( r) is combined in a weight ratio of 1: 4 to 4: 1. 5. The higher alcohol according to claim 1, wherein the pH adjuster of the component (D) is at least one acid selected from the group consisting of citric acid, boric acid and sulfuric acid. Concentrated neutral detergent composition.