JP2003138297A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid detergent composition which has an appropriate viscosity even when it contains a high concentration surface active agent, raises its viscosity higher than the viscosity of the stock solution when diluted with water, and does not cause a quick reduction of the viscosity even when further diluted with water so as to render the viscosity not higher than the viscosity of the stock solution. SOLUTION: In the liquid detergent composition comprising at least an anionic surface active agent and a nonionic surface active agent, 20-50 wt.% sum of the surface active agents being neutral, an alkali metal chloride is added in an amount for thickening the viscosity to a viscosity of not lower than the viscosity of the stock solution having a flowability of 100-320 mPas when diluted with water to the liquid detergent composition to form a liquid detergent composition. The surface active agents may contain an ampholytic surface active agent in addition to the anionic surface active agent and the nonionic surface active agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid detergent composition suitable for use as a kitchen liquid detergent, and more particularly to a liquid detergent composition having excellent detergency against oil stains.

[0002]

2. Description of the Related Art Most of the kitchen detergents for hand washing are in liquid form. In general, with respect to tableware stains, particularly oil-based stains, the higher the detergent concentration and the longer the contact time with the stains, the higher the detergency. Therefore, before use, the undiluted solution is included in a sponge to wash dirty dishes. However, even when it is contained in the sponge and washed with the undiluted solution, the detergent concentration is diluted by the water already contained in the sponge, the water adhering to the dishes, or the water added later. When the detergent concentration decreases, the viscosity of the detergent liquid decreases, so that the detergent liquid easily flows, the contact with dirt decreases, and the cleaning property decreases. Most commercially available kitchen liquid detergents have a viscosity decrease when diluted with water, and there are also products that increase the viscosity,
Since the stock solution viscosity is relatively high, the workability in factory production is not always good. Further, even when diluted with water, if the degree of dilution becomes too high, the viscosity will drop sharply.

In order to reduce resources, so-called compact type liquid detergents having a high surfactant concentration are widely used. Compact type liquid detergent has high viscosity due to high surfactant concentration, and a hydrotrope agent such as urea, ethyl alcohol, sodium paratoluene sulfonate, sodium cumene sulfonate or sodium xylene sulfonate is added to reduce the viscosity. Although the viscosity is adjusted by adjusting the viscosity, a thickening action does not occur when diluted with water depending on the hydrotrope agent composed of these materials.

Table 1 below shows the measurement results of the viscosity change when various commercially available compact type liquid kitchen detergents were diluted with tap water.

[Table 1]

In Table 1, detergent A has a stock solution viscosity of 365 m.
It has a high Pa · s and a higher viscosity than the undiluted solution up to a 2- to 3-fold dilution, but shows a sharp decrease in viscosity when diluted more than that. Detergent B shows a sharp viscosity drop immediately upon dilution with water. Detergent C shows a relatively small decrease in viscosity up to 2-fold dilution, but shows a sharp decrease in viscosity when diluted more than that. Detergent A has a high viscosity increase upon dilution with water and is preferable, but since the initial viscosity is relatively high, a lower viscosity is preferable from the viewpoint of ease of taking out from the container when the content of the container becomes small.

[0006]

The present invention has been made in view of the above points, and an object thereof is to have an appropriate viscosity even if it contains a high concentration of a surfactant and to dilute it with water. Then, there is provided a liquid detergent composition which has a viscosity higher than that of the stock solution, and does not cause a sharp decrease in viscosity even when diluted with water so that the viscosity becomes equal to or lower than the stock solution viscosity.

[0007]

In order to solve the above problems, the liquid detergent composition according to the present invention contains at least an anionic surfactant and a nonionic surfactant, and the total amount of the surfactant is 20 to 50. In the case of a neutral liquid detergent composition having a weight percentage, the liquid detergent composition has a stock solution viscosity of 100 to 3
Alkali having an amount of 20 mPa · s [measurement temperature: 25 ° C., 20 rpm, E-type viscometer (manufactured by Tokimec Co., Ltd., the same applies hereinafter) and which thickens more than the viscosity of the stock solution when diluted with water. Metal chloride was added. The surfactant may contain an amphoteric surfactant in addition to the anionic surfactant and the nonionic surfactant. Stock viscosity 1
The reason why it is set to be 0 to 320 mPa · s is that the viscosity is suitable for facilitating factory productivity and improving outflow from the container during use.

In particular, the surfactant contains 5 to 21% by weight of an anionic surfactant and 14 to 35% by weight of a nonionic surfactant, and the weight of the nonionic surfactant is more than that of the anionic surfactant. %, And a liquid detergent composition containing 0.1 to 10% by weight of an alkali metal chloride selected from sodium chloride and / or potassium chloride is preferable for effectively producing the effects of the present invention. confirmed. The solvent content is preferably 3 to 10% by weight.

Further, the anionic surfactant is sodium poly (3) oxyethylene dodecyl ether sulfonate, the nonionic surfactant is coconut fatty acid diethanolamide, and the anionic surfactant and the nonionic surfactant are Liquid detergent compositions having a ratio of 3 to 5: 5 are preferred.

The liquid detergent composition constituted as described above is
Since it has a reasonable viscosity, it has good productivity in the factory, and even if it remains in the container, it easily flows out of the container and exhibits excellent cleaning properties when used.

Here, as the anionic surfactant: a polyalkyl having an alkyl group having an average carbon number of 10 to 18 (preferably 12 to 14) and having 1 to 6 mol (preferably 2 to 3 mol) of ethylene oxide added thereto. Oxyethylene alkyl ether sulfonate: 3 to 20% by weight, preferably 5 to 15% by weight or alkanesulfonate having an alkyl group having an average carbon number of 10 to 18: 0 to 20% by weight, preferably 2-1
Α-having 0% by weight or an alkyl group having an average carbon number of 10 to 18
Olefin sulfonate: 0 to 20% by weight, preferably 2 to 10% by weight, or fatty acid salt having a saturated or unsaturated carbon chain having an average carbon number of 10 to 18, especially oleate: 0 to 3% by weight, preferably Is 0.5 to 2% by weight.

As the nonionic surfactant, there are: 3 to 12 mol (preferably 7 to 9 mol) of ethylene oxide having an alkyl group having an average carbon number of 10 to 18 (preferably 12 to 14) or, if necessary, Polyoxyalkylene alkyl ether added with propylene oxide, preferably polyoxyethylene alkyl ether: 1 to 15% by weight, preferably 2 to 8% by weight or an average carbon number of 8 to 18 (preferably 12 to 14)
Alkyl group-containing fatty acid mono- or diethanolamide: 3 to 30% by weight, preferably 8 to 25% by weight is used. Still more preferred are nonionic surfactants.

Next, as the amphoteric surfactant, alkyldimethylamine oxide having an alkyl group having an average carbon number of 8 to 18 (preferably 10 to 14): 0 to
20% by weight is used.

Among these anionic surfactants, nonionic surfactants, and amphoteric surfactants, two or more types, preferably three or more types, are combined so that the anionic and nonionic surfactants are 1: 9. ~ 9: 1, preferably 3: 7 to 5: 5 ratio, total surfactant content 20% by weight
It is used in the range of 50 to 50% by weight, preferably 20 to 40% by weight.

Next, the solvent is preferably a solvent obtained by adding 2-3 mol of ethylene oxide or propylene oxide,
Dipropylene glycol is particularly preferable. 1 to 1
12% by weight, preferably 3 to 10% by weight.

Next, as the chloride of the alkali metal, sodium chloride or potassium chloride, especially sodium chloride is preferable, and 0.1 to 10% by weight is added.

In the detergent composition of the present invention, if necessary, other surfactants such as anionic surfactants such as long-chain sodium alkylbenzenesulfonate and sodium alkylsulfate, and amphoteric surfactants such as alkylbetaine and alkylsulfobetaine. Agents, nonionic surfactants such as alkyl glycosides, and hydrotropes such as urea, ethyl alcohol, sodium paratoluene sulfonate, sodium cumene sulfonate or sodium xylene sulfonate, and the like can also be used.

If desired, sequestering agents such as citrate, ethylenediaminetetraacetate and nitrilotriacetate, bactericides, preservatives, dyes and fragrances can be added to the detergent composition of the present invention.

The detergent composition according to the present invention has an undiluted solution viscosity of about 100 to 320 mPa · s (measurement temperature: 25 ° C.) and a moderate viscosity, so that the container composition in factory production is good and the productivity is high. On the other hand, when used in the kitchen, the outflow property from the container is good, and even if the remaining amount in the container is low, it easily flows out from the container. Even if diluted with several times the water, the viscosity will increase more than the stock solution, so when washing the dishes with the detergent stock solution in a sponge, it prevents the detergent from flowing out of the sponge and prevents the detergent from flowing down wastefully. The sticky detergent adheres to the dirt and enhances the cleanability. Furthermore, it is easy to rinse and gives a clean wash.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, examples of the present invention will be illustrated, but the present invention is not limited to the examples.

[Example 1] [0021] Blending components and blending ratios of the detergent composition according to Example 1 and the detergent composition according to Comparative Example 1 and measured values of the viscosity of the undiluted solution of these detergent compositions, and when diluted The measured viscosity values are shown in Table 2 below.

[Table 2]

In Table 2, sodium poly (3) oxyethylene dodecyl ether sulfonate and sodium α-olefin sulfonate are anionic surfactants,
Palm fatty acid diethanolamide is a nonionic surfactant and dodecyldimethylamine oxide is an amphoteric surfactant. Further, ion-exchanged water is added so as to make 100% by weight as a whole.

As shown in Table 2 above, the only difference in composition between the detergent composition of Example 1 and the detergent composition of Comparative Example 1 is whether or not sodium chloride is added. is there. The detergent composition according to Example 1 is the same as Comparative Example 1.
Although the undiluted solution viscosity is lower than that of the above-mentioned detergent composition, it shows a higher viscosity than the initial undiluted solution viscosity up to 7-fold dilution by dilution. In addition, keep the viscosity below that of the undiluted solution 8
It retains a relatively high viscosity even when diluted more than twice. The maximum viscosity at the time of dilution is 2 times in Comparative Example 1, whereas it is 5 times in Example 1. In Comparative Example 1, the initial viscosity is high, and the viscosity is higher than that of the stock solution up to 2- to 3-fold dilution, but when it is diluted more than that, a sharp decrease in viscosity is exhibited.

[Example 2] Blending components and blending ratios of the detergent composition according to Example 2 and the detergent composition according to Comparative Example 2 and measured values of the viscosity of the undiluted solution of these detergent compositions and the measured values when diluted The measured viscosity values are shown in Table 3 below.

[Table 3]

As shown in Table 3, the difference in composition between the detergent composition according to the present Example 2 and the detergent composition according to Comparative Example 2 is only in whether or not sodium chloride is added. . An undiluted solution of the detergent composition according to Comparative Example 2 becomes a gel and does not show fluidity at all, but a sharp decrease in viscosity occurs due to dilution. On the other hand, in the detergent composition according to Example 2, the stock solution viscosity was 294 mPa · s, the fluidity was high, and the viscosity increase due to dilution was observed. Further, the detergent composition according to Example 2 remained transparent even at low temperature (-5 ° C) and had good fluidity.

Example 3 The following table shows the blended components and blending ratios of the detergent composition according to Example 3, the measured values of the viscosity of the undiluted solution of these detergent compositions, and the measured values of the viscosity when diluted. 4 shows.

[Table 4]

As shown in Table 4, also in Example 3, sodium chloride was used as the alkali metal chloride. The detergent composition according to Example 3 has a low undiluted solution viscosity, but shows a higher viscosity than the initial undiluted solution viscosity up to a 4-fold dilution by being diluted, and is diluted 5-fold so as to be equal to or lower than the undiluted solution viscosity. Even if it does, there is no sudden decrease in viscosity and a relatively high viscosity is maintained. The maximum viscosity at the time of dilution was twice the stock solution viscosity at the time of 4-fold dilution. When this detergent composition is used as a kitchen detergent, good detergency is obtained,
It was easy to rinse and had a clean finish.

[Example 4] [0028] Blended components and blending ratios of the detergent composition according to Example 4 and the detergent composition according to Comparative Example 3 and measured values of the viscosity of the undiluted solution of these detergent compositions, and when diluted The measured viscosity values are shown in Table 5 below.

[Table 5]

As shown in Table 5, the difference in composition between the detergent composition according to Example 4 and the detergent composition according to Comparative Example 3 is whether or not sodium chloride which is an alkali metal chloride is added. The only difference is the addition of sodium sulfate, which is different from. The poly (8) oxyethylene dodecyl ether is a nonionic surfactant. Example 4
In the detergent composition according to Example 2 and the detergent composition according to Comparative Example 3, the sodium chloride-based Example 4 is more excellent in thickening. Comparative Example 3 of the sodium sulfate type also has a thickening property, but is inferior to the sodium chloride type. Further, in Example 4, it was transparent even at room temperature and at −5 ° C. for 24 hours, but in Comparative Example 3, it was already translucent and cloudy at room temperature.

[Example 5] Table 6 below shows the blending components and blending ratio of the detergent composition according to Example 5.

[Table 6]

As shown in Table 6, also in Example 5, sodium chloride was used as the alkali metal chloride. The undiluted solution viscosity of the detergent composition according to Example 5 is 190 mPa · s at 25 ° C., 269 mPa · s at 2 times dilution (thickness ratio 1.4), and 324 mPa · s at 3 times dilution (thickness ratio 1.
7) 394 mPa · s (thickening ratio 2.1) by 4-fold dilution,
4 times at 163 mPa · s (thickening ratio 0.86) with 5 times dilution
The viscosity was higher than that of the stock solution until double dilution, and even when the stock solution was diluted 5 times to be less than the stock solution viscosity, the viscosity did not decrease sharply and the viscosity was kept relatively high. The maximum viscosity at the time of dilution was 2.1 times the viscosity of the stock solution at the time of 4-fold dilution. In Example 5, the system was transparent and stable even when stored at -5 ° C for one week.

[Example 6] Table 7 below shows the blending components and blending ratio of the detergent composition according to Example 6.

[Table 7]

In Example 6, in the basic constitution described in the upper table of Table 7, the content of the whole surfactant was 30.
As the weight%, sodium (3) oxyethylene dodecyl ether sulfonate which is an anionic surfactant is A% by weight, and coconut fatty acid diethanolamide which is a nonionic surfactant is B% by weight, and the total amount of both is A + B.
A and B were blended in various ratios so that the concentration was 30% by weight, and the undiluted solution viscosity and the water-diluted viscosity in each case were measured.

Usually, in the case of this type of compact type liquid detergent composition, the anionic surfactant is blended more than the nonionic surfactant. However, as can be seen from this table, when sodium chloride is blended, It can be seen that the viscosity when diluted with respect to the stock solution can be increased by increasing the weight% of the nonionic surfactant more than the weight% of the surfactant. In particular, the ratio of anionic surfactant to nonionic surfactant is preferably in the range of 3: 7 to 5: 5.

[Example 7] The compounding ingredients and the compounding ratio of the detergent composition according to Example 7 are shown in Table 8 below.

[Table 8]

In Example 7, in the basic constitution shown in the upper table of Table 8, the content ratio of sodium chloride was changed to C% by weight and the compounding ratio was changed, and the stock solution viscosity and the water diluted viscosity were measured in each case. The results are shown in the table below.

As can be seen from the table on the lower side, by adding sodium chloride, it is possible to increase the viscosity when diluted rather than the stock solution viscosity. The effect was confirmed over all of 0.5 to 10% by weight of sodium chloride. It was also confirmed that the stock solution viscosity itself decreased as the sodium chloride was added.

Here, as Comparative Example 4 of Example 7, Table 9 below shows the compounding components and the compounding ratio of the conventional liquid kitchen detergent, and the measurement results of the undiluted solution viscosity with respect to the added amount of sodium chloride.

[Table 9]

As shown in Table 9, when sodium chloride is added, the stock solution viscosity increases. However, for example, when the sodium chloride content is 0.35% by weight, the stock solution viscosity is 249 m.
Pa · s, but viscosity at 2 times dilution is 6 mPas
・ It was s. That is, in the conventional liquid kitchen detergent, the viscosity of the undiluted solution increases due to the addition of sodium chloride, but the viscosity rapidly decreases when diluted.

Conventionally, it is generally practiced to add sodium chloride to adjust the viscosity (particularly to increase the viscosity). However, in this case, as can be seen from Comparative Example 4, the amount of sodium chloride added was relatively small, and when diluted with water, the viscosity rapidly decreased and the viscosity did not increase.
In the case of Comparative Example 4, the addition ratio of the surfactant was small, and in this type of liquid kitchen detergent, thickening at the time of dilution could not be expected at all.

In the case of the present invention, an effective thickening at the time of dilution can be achieved by adding sodium chloride to a liquid detergent composition containing a plurality of surfactants in a high ratio (20 to 50% by weight). That is, the invention was made by utilizing this finding. That is, in the case of a liquid detergent composition in which a plurality of surfactants are added at a high ratio (20 to 50% by weight), for example, as shown in Table 8 of Example 7, the undiluted solution viscosity itself is obtained by adding sodium chloride. In this respect, there is no thickening effect, but a clear thickening effect occurs at the time of dilution, so the present invention increases the stock solution viscosity to an appropriate viscosity to enhance factory productivity, and at the same time it has an effect at the time of dilution. Inventing a liquid detergent composition that improves the detergency by virtue of the fact that it has an effective thickening effect, and that it can thicken up to a considerable amount of dilution and that the viscosity does not drop sharply even if it is further diluted. is there.

[0042]

As described in detail above, according to the present invention, even if a high concentration of a surfactant is contained, it has an appropriate viscosity and has good workability in factory production, and the remaining amount in the container is small. Even if it becomes, the flowability from the container is good, and when diluted with water, the viscosity rises above the viscosity of the stock solution. It is possible to provide a liquid detergent composition which is particularly excellent in cleaning oil stains and is suitable for use as a neutral kitchen liquid detergent.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hisaeda Katayanagi             135 Nishimaehara, Fujioka-machi, Shimotsuga-gun, Tochigi Prefecture F-term (reference) 4H003 AB14 AB15 AB31 AC13 AC15                       BA12 DA17 DB02 EA19 EB08                       ED02 ED29 FA30

Claims (3)

[Claims] 1. At least an anionic surfactant and a nonionic surfactant, wherein the total amount of the surfactant is 20 to 50.
A neutral liquid detergent composition having a weight ratio of 100 to 320 mP is added to the liquid detergent composition.
A liquid detergent composition, which has a fluidity of a · s (measurement temperature: 25 ° C.) and is added with an amount of an alkali metal chloride that thickens more than the viscosity of the stock solution when diluted with water. 2. The surfactant comprises 5 to 21% by weight of anionic surfactant and 14 to 35% by weight of nonionic surfactant.
0.1% by weight of the anionic surfactant, and more than 0.1% by weight of the nonionic surfactant, and 0.1 to 0.1% by weight of the alkali metal chloride selected from sodium chloride and / or potassium chloride. Liquid detergent composition according to claim 1, characterized in that it comprises 10% by weight. 3. The anionic surfactant is sodium poly (3) oxyethylene dodecyl ether sulfonate, the nonionic surfactant is coconut fatty acid diethanolamide, and the anionic surfactant and the nonionic surfactant. The liquid detergent composition according to claim 2, wherein the ratio of the agents is in the range of 3: 7 to 5: 5.