JP3012770B2 - High concentration neutral liquid detergent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a neutral liquid detergent composition for dishwashing.

[0002]

2. Description of the Related Art Neutral liquid detergents for dishwashing are roughly classified into household use and business use used in restaurants and the like. For household use, a surfactant concentration of 16 to 22% by weight and a viscosity of 70 to 120 are used. In contrast to centipoise, most commercial products contain 10 to 20% by weight of surfactant, and cheap ones contain 10 to 16% by weight of alkylphenol-based nonionic surfactant. The biodegradability of polyphenols is regarded as important, and a higher alcohol-based nonionic surfactant having good biodegradability is blended, and the surfactant concentration is 15 to 22% by weight.
Is considered a luxury item. Commercial viscosity of 10
Mainly 0 to 400 centipoise, especially 120 to 300 centipoise, and the characteristic is that the liquid for business use has a considerably higher viscosity than the liquid for home use to avoid overuse. Even with the same composition, the liquid temperature rises and the viscosity decreases in summer as the temperature rises, and the liquid temperature decreases and the viscosity rises in winter, so the viscosity measured at 25 ° C is higher in summer and lower in winter. May be adjusted so that the usage sensation in winter and the usage sensation in summer are not significantly different.

[0003] Household products filled in 400-800 ml (milliliter) plastic bottles, or recently filled in plastic bags to reduce waste, are commercially available for refilling the bottles. On the other hand, commercial ones were marketed in 18-liter cans. After use, household bottles are discarded as garbage, whereas commercial cans were once reused or collected as scrap iron.However, due to rising labor costs and a drop in scrap iron prices, these days Although the cans became empty, there were no workers to pick them up, causing a disposal problem.

In order to reduce the amount of waste, companies that manufacture cleaning agents for business use have reduced the size of containers as high-concentration products of 30 to 50% by weight, which is about three times that of ordinary products.
A 4 to 6 liter plastic container was commercialized. However, even in this case, users have had trouble disposing of empty plastic containers. In addition, dishwashing employees are not aware of the high-concentration product and use too much, causing problems such as increased costs and rough hands.

[0005] It has been considered that while the surfactant is further concentrated, a certain amount of hot water or water is put into a special plastic container (4 to 6 liters) prepared in advance at the dish washing site, and the high concentration is added thereto. To dissolve the product and bring it to the normal working concentration. In the case of household use, a certain amount of hot water or water is put into an empty container of a handheld kitchen detergent, and a high-concentration product is put into the container and dissolved therein before use. In this way, the amount of packaging material can be significantly reduced.

However, the higher the concentration of the surfactant, the higher the viscosity of the liquid. In a neutral liquid detergent for dishwashing, a water-soluble salt of a linear alkylbenzene sulfonic acid, specifically, a soda salt, a potassium salt or an ethanolamine salt is an indispensable 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 still in a paste form, so that the dilution operation is not easy. Even if it is not in the form of a paste, those which gel when poured into water are still not easily diluted.

In order not to hinder the work of diluting high-concentration products, the viscosity at 25 ° C. must be 1,000 centipoise or less, preferably 500 centipoise or less, and it should not gel when put into water. On the other hand, the viscosity at 25 ° C.
When a high-concentration product adjusted to 00 centipoise or less, preferably 500 centipoise or less, is diluted to a normal use concentration, the viscosity becomes less than 70 centipoise, 70 to 120 centipoise for home use, and 100 to 4 for business use.
Consumers (homemakers or dishwashing employees) who are accustomed to using conventional products of 00 centipoise, often 120-300 centipoise, will inevitably overuse,
This raises the cost of cleaning agents and the problem of rough hands.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a high-concentration product having a surfactant concentration of 50% by weight or more, which does not form a paste or gelate when poured into water. The viscosity at 100 ° C. is 1000 centipoise or less, preferably 500 centipoise or less, and it is easy to dilute. Further, the viscosity of the aqueous solution diluted to the usual use concentration is 70 to 600 centipoise, preferably 70 to 4 centipoise.
The present invention provides a high-concentration neutral liquid detergent composition that is designed to be 00 centipoise, and enables the weight of empty containers to be reduced.
The purpose is to prevent overuse and rough hands.

[0009]

The high-concentration liquid detergent composition according to the present invention comprises a surfactant component (however, an amphoteric surfactant).
10 to 45% by weight of sodium linear alkylbenzene sulfonate , fatty acid alkanolamide 5
The composition contains only 60% by weight , the total of which is 50 to 75% by weight, and 8 to 18% by weight of a thickener component comprising at least one of ethanol, propylene glycol and polyethylene glycol, and sodium chloride and betaine type amphoteric. The viscosity modifier component of at least one of the surfactants is used in an amount of 0 to 10 based on the total amount of the surfactant components.
And contained by weight%, a viscosity at a viscosity at 25 ° C. is 1000 cps or less, and 25 ° C. of an aqueous solution surfactant component is diluted to 15 wt% 70
The amount of a viscosity reducing agent and the amount of a viscosity modifier are adjusted so as to be ~ 400 centipoise, or a surfactant
Straight-chain alkyl as a component (excluding amphoteric surfactants)
5-45% by weight of sodium benzenesulfonate, fatty acid alcohol
5-60% by weight of canolamide, higher alcohol
Nonionic surfactant 15 which is a lenoxide adduct
Containing only 60% by weight, the total of which is 50-90 weight
% Ethanol and propylene glycol and
At least one of ethylene glycol
5-18% by weight of a viscosity component, sodium chloride and solid
Viscosity consisting of at least one of in-type amphoteric surfactants
The degree adjuster component is 0 to 10 with respect to the total amount of the surfactant component.
% By weight and a viscosity at 25 ° C. of 1000
To less than 15% by weight of surfactant component
The aqueous solution diluted to have a viscosity at 25 ° C. of 70
Amount of viscosity reducing agent and viscosity control so as to be ~ 400 centipoise
The amount of the stabilizer was adjusted.

[0010] Those based on a straight-chain alkylbenzenesulfonic acid ethanolamine salt and a fatty acid alkanolamide previously proposed by the present inventors (Japanese Patent Application No. 5-28417).
In the case of 0), those having a viscosity of 500 centipoise or more at 25 ° C. gelled when poured into water and were difficult to dilute. However, sodium linear alkylbenzene sulfonate (hereinafter referred to as LAS) and fatty acid alkanolamide were used. It was found that the high-concentration product as a base did not gel when poured into water and had a viscosity of 1000 centipoise and could be diluted.

The structure of the present invention will be specifically described below with reference to embodiments. The viscosity of the diluent was measured in a state where the surfactant component was 15% by weight. This is determined from the fact that the concentration of most commercial dishwashing detergents currently on the market is 13 to 18% by weight in higher alcohols, and that it is an intermediate concentration and that the JIS standard is 15% by weight or more. It is. All measurements of viscosity were performed at 25 ° C.

[0012]

Examples 1 to 5 and Comparative Examples 1 to 4 LAS is a surfactant conventionally used as an active ingredient of a neutral liquid detergent for dishwashing. Is not easy to dilute. Even if 10% by weight of ethanol is added to LAS as a viscosity reducing agent, it is still paste-like. However, a combination of LAS and a fatty acid alkanolamide (which is known to be added in a small amount to a neutral liquid detergent for dishwashing as an anti-fat agent) is combined with ethanol, propylene glycol and By blending 8 to 18% by weight of at least one kind of a thickener component of polyethylene glycol, the viscosity of the high-concentration stock solution at 25 ° C is 1%.
000 centipoise or less, and since it does not gel when put into water, dilution becomes easy. It should be further noted that in such a blended system, for example, when the total concentration of the surfactant was 50% by weight, the viscosity of the stock solution was as shown in Table 1, Example 1, Example 2 and Comparative Example 2 shown in FIG. Is L
Although the viscosity increases with an increase in the amount of AS, the viscosity of the solution diluted to a surfactant concentration of 15% by weight first increases with an increase in the amount of LAS, and increases with LAS 25% by weight (fatty acid alkanolamide 2
5% by weight), and thereafter, the viscosity decreases with an increase in the amount of LAS. Until about 35% by weight of LAS (around 15% by weight of fatty acid alkanolamide), the viscosity of the diluent is higher than that of the stock solution. It is a unique phenomenon of being high. The viscosity of the diluent exceeds 70 cP in the range of around 9% by weight to 43% by weight of LAS. LAS 45% by weight and fatty acid alkanolamide 5
In the case of a composition in which only 10% by weight of ethanol was added as a thickener to Comparative Example 2 (Comparative Example 2), the viscosity of the solution diluted to a surfactant concentration of 15% by weight was lower than 70 cP.
By adding a small amount of sodium chloride as a viscosity modifier as shown in (1), the viscosity of the diluent becomes higher than 70 cP. The present invention has been completed based on such new findings. When the blending amount of LAS is 5% by weight (Comparative Example 1), the diluent becomes cloudy, and when the blending amount is 50% by weight (Comparative Example 4: Table 2), the stock solution becomes a paste, and neither is preferable. As the fatty acid alkanolamide, a 1: 2 mole type fatty acid alkanolamide (Amizole FD) obtained by dehydrating and condensing 1 mole of lauric acid or coconut fatty acid and 2 moles of diethanolamine, or 1 mole of methyl laurate or 1 mole of methyl coconut fatty acid and 1 mole of diethanolamine is used. Although a 1: 1 molar fatty acid alkanolamide (Amizole FDE) obtained by methanol condensation is known,
Either can be used. The lower limit of the amount of the fatty acid alkanolamide is 5% by weight (Example 3), and the upper limit is 60% by weight.
(Example 4: Table 2) When the content of the fatty acid alkanolamide is 65% by weight (Comparative Example 3: Table 2), the viscosity of the high-concentration stock solution exceeds 1000 cP, and the diluent becomes cloudy. The total of the surfactant components was 50% by weight (Examples 1 to 5).
3) to 75% by weight (Examples 4, 5: Table 2).

[0013]

[Table 1]

[0014]

[Table 2]

[0015]

Examples 6 to 12 and Comparative Example 5 A viscosity reducing agent for lowering the viscosity of a paste-form high-concentration surfactant composition to 1,000 centipoise or less, preferably 500 centipoise or less, to facilitate dilution with water at normal temperature. Table 3
Ethanol (Example 6), propylene glycol (Example 7), polyethylene glycol (Example 8), or mixtures thereof (Examples 9, 10) are used as shown in Table 1. If these are selected as the viscosity reducing agents and are in the range of 8% by weight (Example 11: Table 4) to 18% by weight (Example 5: Table 2), there is no possibility that the viscosity of the diluent is significantly reduced.
Although there may be a composition in which the thickener component is 18% by weight or more,
It is not preferable from the viewpoint of increasing the concentration. The lower limit of the blending amount is set to 8% by weight because at 5% by weight, the diluent becomes cloudy (Comparative Example 5: Table 4) and the stock solution becomes a paste.

[0016]

[Table 3]

[0017]

[Table 4]

[0018]

Examples 13 to 23 In order to adjust the viscosity of the diluent of the high-concentration liquid detergent composition of the present invention according to consumers' demands,
Sodium chloride shown in Table 5 (Examples 13 to 18) and betaine type amphoteric surfactant shown in Table 6 (Examples 19 to 18)
It is also possible to add at least 10% by weight or less of the viscosity modifier component of 23) to the total amount of the surfactant component. As evident from the above examples, the viscosity modifier is specified as a numerical value with respect to the total amount of the surfactant component as the viscosity adjusting agent of a liquid obtained by diluting the surfactant component to a constant concentration, for example, 15% by weight. This is because it has a large effect on the viscosity, and the effect on the viscosity of the high-concentration stock solution is small. Basically, as shown in Examples 1 to 12, by adjusting the blending ratio of LAS, fatty acid alkanolamide and the viscosity reducing component, the aqueous solution diluted so that the surfactant component becomes 15% by weight. Since the viscosity at 25 ° C. can be 70 to 600 centipoise, the viscosity modifier may be used for fine adjustment.

[0019]

[Table 5]

[0020]

[Table 6]

[0021]

Examples 24 to 28 As fatty acid alkanolamides, 1 mol of methyl laurate or coconut fatty acid and 1 mol of diethanolamine were subjected to demethanol condensation.
1 mol fatty acid alkanolamide (Amizole FD
Table 7 shows an example of using a 1: 2 mol type fatty acid alkanolamide (Amizole FD) obtained by dehydrating and condensing 1 mol of lauric acid or coconut fatty acid and 2 mol of diethanolamine instead of E). As in the case of using the Amizole FDE shown in Table 5, a remarkable effect is observed in that the viscosity of the diluent is higher than that of the high concentration stock solution.

[0022]

[Table 7]

The above surfactant component (however, amphoteric surfactant)
LAS and fatty acid alkanolamides )
Binary high-concentration liquid detergent composition comprising only a higher alcohol-based nonionic surfactant or LA
Some of the S and fatty acid alkanolamides can be replaced by the nonionic surfactant. A ternary detergent composition comprising only LAS, a higher alcohol-based nonionic surfactant and a fatty acid alkanolamide is characterized in that the higher alcohol as a raw material is (A) a primary higher alcohol having an even number of carbon atoms, (B) a primary higher alcohol containing an odd number of carbon atoms, or (C) a secondary higher alcohol.

[0024]

Examples 33 to 51 As shown in Tables 8 to 11 , a high-concentration liquid detergent composition when a primary higher alcohol-based nonionic surfactant having an even number of carbon atoms was used in combination was used.
Nonionic surfactant which is 5% by weight (Example 34) to 45% by weight, fatty acid alkanolamide 5% to 60% by weight (Example 33) and an ethylene oxide adduct of a primary higher alcohol having an even number of carbon atoms 15 to 60% by weight (Example 39) and the total of these is 50% by weight (Examples 40 to 42) to 90% by weight (Examples 37 to 37).
39) The surfactant component and 5% by weight of a viscosity reducing agent component comprising at least one of ethanol, propylene glycol and polyethylene glycol (Examples 37 and 39)
-18% by weight, and 0-10% by weight of a viscosity modifier component comprising at least one of sodium chloride and betaine type amphoteric surfactant based on the total amount of the surfactant component.
(Examples 43 to 47 and Examples 48 to 51)
The amount of the viscosity reducing agent and the amount of the viscosity modifier are adjusted so that the viscosity at 5 ° C. is 1000 centipoise or less, and the viscosity at 25 ° C. of the aqueous solution diluted so that the surfactant component is 15% by weight is 70 to 400 centipoise. It has been adjusted.

[0025]

[Table 8]

[0026]

[Table 9]

[0027]

[Table 10]

[0028]

[Table 11]

[0029]

Examples 52 to 66 When a primary higher alcohol-based nonionic surfactant containing an odd number of carbon atoms is used, a high-concentration liquid detergent composition is prepared as shown in Tables 12 to 14 by LAS5. % By weight (Examples 52 and 53) to 45% by weight, fatty acid alkanolamide 5% by weight (Example 59)
A nonionic surfactant, which is an ethylene oxide adduct of a primary higher alcohol containing from 60 to 60% by weight and having an odd number of carbon atoms, from 15 % by weight to 50% by weight (Example 52), and the total thereof is 50% by weight. % (Examples 59 and 6
0, 61) to 85% by weight (Examples 52 to 56) of a surfactant component and 5% by weight of a viscosity reducing agent component composed of at least one of ethanol, propylene glycol and polyethylene glycol (Examples 61 to 18). % By weight, and 0 to 10% by weight of a viscosity modifier component comprising at least one of sodium chloride and betaine type amphoteric surfactant based on the total amount of the surfactant component (Examples 62 to 66)
The amount and viscosity of the thinning agent are adjusted so that the viscosity at 25 ° C. of the aqueous solution containing the diluent having a viscosity at 25 ° C. of 1,000 centipoise or less and a surfactant component of 15% by weight is 70 to 400 centipoise. The dosage is adjusted.

[0030]

[Table 12]

[0031]

[Table 13]

[0032]

[Table 14]

[0033]

Examples 67 to 87 As shown in Tables 15 to 18 , the LAS 5% by weight (Example 67) was obtained as shown in Tables 15 to 18 when a secondary higher alcohol-based nonionic surfactant was used. 45% by weight, 5% by weight of fatty acid alkanolamide (Example 75) to 60% by weight, and 15 to 50% by weight of nonionic surfactant which is an ethylene oxide adduct of a secondary higher alcohol (Example 67), and Is 50% by weight (Examples 73, 74, 75) to 9
0% by weight (Examples 67 and 68) of a surfactant component, 5% by weight (Example 67) to 18% by weight of a viscosity reducing agent component comprising at least one of ethanol, propylene glycol and polyethylene glycol, and chloride 0 to 10% by weight of the viscosity modifier component comprising at least one of sodium and betaine type amphoteric surfactants based on the total amount of the surfactant components (Examples 79 to 83 and Examples 84 to 8)
7) The viscosity at 25 ° C of an aqueous solution which is diluted so that the viscosity at 25 ° C is 1000 centipoise or less and the surfactant component is 15% by weight is 70 to 400.
The amount of the viscosity reducing agent and the amount of the viscosity modifier are adjusted so as to become centipoise.

[0034]

[Table 15]

[0035]

[Table 16]

[0036]

[Table 17]

[0037]

[Table 18]

[0038]

Examples 88 to 99 The high-concentration liquid detergent compositions of the present invention have compatibility. Therefore, as a nonionic surfactant,
(A) an ethylene oxide adduct of a primary alcohol having an even number of carbon atoms, (B) an ethylene oxide adduct of a primary higher alcohol containing an odd number of carbon atoms, and (C) a secondary higher alcohol. Of the ethylene oxide adducts, two or three of them can be used in combination. In that case, it is sufficient that each of the above-mentioned conditions is satisfied. That is, it corresponds to a mixture of two or more kinds of compositions selected from a binary composition comprising LAS and a fatty acid alkanolamide and a ternary composition to which an ethylene oxide adduct of the above various alcohols is added. A high-concentration liquid detergent composition having a composition may be used. The composition examples are shown in Tables 19 to 20 .

[0039]

[Table 19]

[0040]

[Table 20]

The nonionic surfactant, which is an ethylene oxide adduct of a higher alcohol, preferably has 5 to 10 mol of ethylene oxide added thereto. If the amount is 5 mol or less, the solution tends to be turbid, and if it is 12 mol or more, the material is undesirably solidified at room temperature and inconvenient to handle. When different moles of the ethylene oxide adduct are used as a mixture, they can be selected within the common sense of those skilled in the art, provided that the average number of moles added is within the above range.

The high-concentration neutral liquid detergent composition of the present invention has a surfactant concentration of 50 to 90% by weight, and thus has a concentration of 3 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 concentration of the high-concentration detergent solution for dilution may be about 0.6 to 1 liter. , A plastic bag type container or a paper pack type container, and the waste can be significantly reduced.

Although the above description has been made with an example of a commercial detergent, the high-concentration neutral liquid detergent composition of the present invention can also be used as a household dishwashing detergent, and plastics discarded from households as garbage. It is also effective in reducing the weight of containers.

The high-concentration neutral liquid detergent composition of the present invention comprises
Preservatives, coloring agents, added to ordinary liquid detergent compositions,
It is free to add fragrances and the like.

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 that meets the needs of the market and customers is prepared. Can be arbitrarily designed.

For reference, a nonionic surfactant alone, which is an ethylene oxide adduct of a primary higher alcohol having an even number of carbon atoms, or a nonionic surfactant which is an ethylene oxide adduct of a secondary higher alcohol, for reference. Table 21 shows the viscosities and properties of the high-concentration solution and the diluting solution of the activator alone, and Table 22 shows a list of the raw materials used in Examples and Comparative Examples.

[0047]

[Table 21]

[0048]

[Table 22]

[0049]

According to the present invention, even a high-concentration product having a surfactant concentration of 50% by weight or more does not form a paste or gel when poured into water, and has a viscosity of 1 at 25 ° C.
000 centipoise or less, preferably 500 centipoise or less, which is easy to dilute, and has a viscosity at 25 ° C. of 70 to 600 centipoise even at an aqueous solution diluted so that the surfactant component, which is usually used, is 15% by weight. A high-concentration liquid, preferably 70-400 centipoise, that maintains the viscosity of the dishwashing detergent that the user is accustomed to, prevents overuse and rough hands, makes the product packaging compact, and enables the weight of empty containers to be reduced. A cleaning composition is obtained.

[Brief description of the drawings]

FIG. 1 LAS / fatty acid alkanolamide 2 containing 10% by weight of ethanol and having a surfactant concentration of 50% by weight
For the stock solution of the original high concentration neutral liquid detergent composition, LA
Stock solution and surfactant concentration 15% by weight with change in S concentration
FIG. 4 is a diagram showing a change in viscosity of a liquid diluted to 1.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiharu Uehara 1-3-3-107 Abiko Higashi, Sumiyoshi-ku, Osaka-shi, Osaka (56) References JP-A-5-320698 (JP, A) JP-A 64-64 66298 (JP, A) JP-A-2-113100 (JP, A) JP-A-7-316589 (JP, A) JP-A 7-118695 (JP, A) JP-A-6-240292 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) C11D 1/83

Claims (2)

(57) [Claims] A surfactant component (however, an amphoteric surfactant is used)
Excluding) linear sodium alkylbenzene sulfonate 1
0-45% by weight , containing only 5-60% by weight of fatty acid alkanolamide , the total of which is 50-75% by weight.
In, and ethanol, propylene glycol and polyethylene least reduced to one made of tacky ingredients 8 to 18 wt% and sodium chloride and betaine type amphoteric surfactants surfactant viscosity modifier component at least consisting of one of: in a glycol agent is contained 0-10 wt% relative to components the total amount, a viscosity at 25 ° C. is 1000 cps or less, and a viscosity at 25 ° C. of an aqueous solution surfactant component is diluted to 15 wt% is 70 ~ 4
A high-concentration liquid detergent composition characterized in that the amount of a viscosity reducing agent and the amount of a viscosity modifier are adjusted so as to be 00 centipoise. 2. A surfactant component (however, an amphoteric surfactant is used)
Excluding) linear sodium alkylbenzene sulfonate 5
~ 45% by weight, fatty acid alkanolamide 5 ~ 60% by weight
%, Higher alcohol ethylene oxide adduct
Nonionic surfactant containing only 15 to 60% by weight,
Their sum is 50-90% by weight, and ethanol,
In propylene glycol and polyethylene glycol
5 to 18% by weight of at least one kind of a viscosity reducing agent
Of sodium chloride and betaine type amphoteric surfactant
At least one viscosity modifier component is added to the surfactant
0 to 10% by weight with respect to the total amount at 25 ° C
Is less than 1000 centipoise and the interface
Of an aqueous solution diluted so that the activator component is 15% by weight.
The viscosity at 25 ° C becomes 70 to 400 centipoise.
The amount of the viscosity reducing agent and the amount of the viscosity modifier are adjusted as described above.
A high-concentration liquid detergent composition, comprising: