CN114350453B - Concentrated detergent composition - Google Patents

Abstract

The present invention relates to the technical field of daily detergents, and in particular to a concentrated detergent composition, comprising the following components in percentage by weight: 30-70% surfactant, 0.2-10% rheology modifier, 0-10% functional additive, 0-2% fragrance, and water remainder. The rheology modifier comprises component a and component b in a weight ratio of 1:1.2-5, wherein component a comprises hydroxypropyl guar gum, and component b comprises xylene sulfonate and/or isopropylbenzene sulfonate. The concentrated detergent composition of the present invention can significantly improve the fluidity of the concentrated detergent composition, the solution composition is uniform, the rheological properties are good, the use of unnecessary solvents is reduced, and the detergency is not affected. The washing product obtained by the present invention has a qualified appearance, good low and high temperature stability, can adjust the appropriate use viscosity according to the dosage, improve the filling efficiency of the unit dose packaging, and the product effect is more green and stable.

Description

A concentrated detergent composition

Technical Field

The present invention relates to the technical field of daily detergents, and in particular to a concentrated detergent composition.

Background Art

Concentrated detergents have a higher content of active ingredients, that is, they have increased the content of surfactants, which exceeds similar products such as laundry detergents, have twice or even more cleaning power, are easy to use, and reduce storage space. At the same time, they can save energy and reduce pollution. Low-carbon development is the only way forward. The detergent industry is closely related to consumption and the environment. Detergent concentration can save resources, reduce energy consumption, and reduce _CO2 emissions. Therefore, detergent concentration is an inevitable choice for sustainable development.

When the viscosity of the detergent is within a stable range, the fluidity will be improved, making it easier to pour and use, easier to dissolve in water, and more dispersible, making it easier to remove stains. However, the concentration of the detergent will affect the fluidity and stability of the product, and it is prone to gelation, or there will be problems such as excessive viscosity and poor water dispersibility, such as increased viscosity at low temperatures and decreased viscosity at high temperatures, which will affect the product state and make it difficult to use. At present, increasing the temperature range of viscosity stability and solving its fluidity and rheological stability problems have become a major technical difficulty in the development of concentrated detergent formulas.

Chinese patent CN111575121A discloses a water-soluble concentrated gel cleaner, a preparation method and a flushing cleaning method, which involves a rheology modifier used in the concentrated gel cleaner, namely, ester-terminated polyamide, tertiary amine-terminated polyamide, polyepoxy-terminated polyamide, etc. The cleaner prepared by this patent has excellent cleaning effect, and can also gradually dissolve the surface layer under the flushing and shearing of water, dilute to a certain concentration of detergent, and reduce the frequent addition of cleaning agent. However, when the rheology modifier is added, it needs to be heated to 83-100°C to soften it. The temperature of the preparation process is too high and the preparation is cumbersome.

Summary of the invention

In order to solve the above technical problems, the present invention provides a concentrated detergent composition. The concentrated detergent composition uses a specific component a and a component b as a rheology modifier, has good rheological properties within the temperature range of daily use, has a viscosity that is less affected by temperature, has good performance, and has a low temperature requirement during the preparation process.

The specific technical scheme of the present invention is:

A concentrated detergent composition comprising the following components:

Surfactants;

Rheology regulator; the rheology regulator comprises component a and component b, wherein component a comprises hydroxypropyl guar gum, and component b comprises xylene sulfonate and/or cumene sulfonate;

water.

The present invention uses component a and component b as rheology regulators. The mechanism of component a improving the rheology of detergent is as follows: hydroxypropyl guar gum introduces a hydrophilic group hydroxypropyl into the molecular structure of guar gum, improves the hydrophilicity of guar gum, has good dispersing and dissolving performance, and high temperature and viscosity stability performance, can also form a high viscosity solution in a low viscosity surfactant system, and exhibits non-Newtonian rheological properties. Component b (xylene sulfonate and/or isopropylbenzene sulfonate) improves the rheology of detergent because it has excellent hydrotropy, viscosity reduction, anti-caking, dispersing and emulsifying properties. As a structural progression of alkylbenzene sulfonate, the sulfonic acid group is on the aromatic ring, and an alkane chain is added. The substituent on the aromatic ring promotes the interaction of the lipophilic group in the surfactant to enhance, the interfacial tension is reduced, the molecules are arranged closely, the interfacial film strength is increased, and the interfacial film has a protective effect on the dispersed phase condensation beads, so that it is not easy to condense when colliding with each other, so it can reduce the viscosity in the extremely high viscosity solution and improve the fluidity and solubility.

The present invention team found that after compounding component a and component b, the two can also cooperate with each other to exert a synergistic effect of "1+1>2", so that the rheology modifier can be stably suspended in the concentrated detergent, and the effect of improving rheological properties is less affected by temperature, so that the concentrated detergent maintains a relatively stable viscosity within the temperature range of daily use, and will not affect the product form due to temperature changes, or the problem of drastic increase and decrease in viscosity will occur, while reducing the use of unnecessary solvents. After obtaining this accidental discovery, the present invention team conducted further research and analysis, and speculated that the synergistic mechanism of component a and component b is as follows: hydroxypropyl guar gum is compatible with anionic and cationic surfactants, nonionic surfactants, and zwitterionic surfactants. The macromolecular spherical structure of hydroxypropyl guar gum can effectively suspend heavier particles in the solution, and adding a small amount can achieve good suspension and thickening effects. In concentrated solutions with high surfactant content, the active substance (i.e., surfactant) increases and the solubility decreases. The hydrophilic group hydroxypropyl in hydroxypropyl guar gum can increase the solubility of the active substance, but at the same time, the increase in solubility will also increase the probability of collision and aggregation of active substance molecules. The introduction of alkane chains into the system using alkyl aryl sulfonates can cause spatial hindrance to the lipophilic groups in the active substance, thereby hindering the aggregation of active substance molecules when they collide, increasing the stability of the concentrated detergent solution and making the viscosity more stable. A high-viscosity solution can also be formed in a low-viscosity, high-active substance solution. The droplet particles of the aqueous solution are not easy to separate, and the viscosity of the solution is less affected by temperature.

In addition, the rheology modifier in the present invention does not need to be heated and softened, and can be uniformly mixed with other components at room temperature, thereby reducing the temperature requirement during the preparation of the concentrated detergent composition and simplifying the preparation process.

When the concentrated detergent of the present invention is made into beads, the canned viscosity of the detergent can be adjusted by controlling the amount of the rheology regulator, thereby improving the filling efficiency of the unit dose package and making the product effect more green and stable.

Preferably, the concentrated detergent composition comprises the following components in weight percentage:

Surfactant 30-70%;

Rheology modifier 0.2-10%;

Functional additives 0-10%;

Fragrance 0-2%;

Water balance.

Furthermore, the concentrated detergent composition comprises the following components in weight percentage:

Surfactant 30-60%;

Rheology modifier 0.2-10%;

Functional additives 0.1～10%;

Flavor 0.01～1%;

Water balance.

Preferably, the weight ratio of component a to component b is 1:1.2-5.

The present invention team found in the research process that the ratio of component a to component b has a great influence on its effect. Specifically, when the relative amount of component a is too large, insoluble matter or precipitation will appear in the solution. The reason is that although the introduction of hydroxypropyl groups can improve the performance of guar gum to a certain extent and greatly improve its solubility, hydroxypropyl guar gum still has a water-insoluble content of about 7%. If its relative amount is too large, the concentrated detergent solution will be unstable, the low-temperature stability will deteriorate (it is easy to become turbid at lower temperatures), and the viscosity will be easily affected by temperature. When the relative amount of component b is too large, due to the limited solubility of alkyl aryl sulfonate, the concentrated detergent solution will become turbid, and its low-temperature stability will also deteriorate, and the viscosity will be easily affected by temperature, affecting the consumer's experience. When the weight ratio of component a and component b is controlled within the range of 1:1.2 to 5, a good synergistic effect can be produced, so that the concentrated detergent has good low-temperature stability within the temperature range of daily use, and the viscosity is less affected by temperature.

Preferably, the surfactant is a compound of a nonionic surfactant, an anionic surfactant and a zwitterionic surfactant.

Furthermore, the nonionic surfactant includes C8-C18 fatty alcohol polyoxyethylene ether and/or C8-C14 alkyl glycoside.

Furthermore, in the concentrated cleaning composition, the mass content of the alkyl glycoside is 2-5%.

When alkyl glycoside is added as a surfactant in a concentrated detergent, the rheology modifier of the present invention can achieve better results than the use of alcohols to adjust the viscosity. The reason is that alkyl glycoside has more hydroxyl groups, which are aggregated in the ring structure of glucose. Its hydrophilicity comes from the hydrogen bonds formed by multiple hydroxyl groups. In addition, alkyl glycoside has a thickening effect and can be dissolved and remain stable in a highly concentrated solution. However, the viscosity of the alkyl glycoside aqueous solution itself is very high. As the amount added increases, the viscosity of the entire system also increases. Alkyl glycoside is insoluble in commonly used organic solvents. Therefore, the effect of adjusting the viscosity of the system by alcohols is not obvious. Using a rheology modifier to adjust the viscosity and fluidity of the system will have a more obvious effect.

Moreover, due to the above reasons, when the content of alkyl glycoside in the formula increases, the rheological properties of the concentrated detergent will be improved more significantly by the rheological modifier, but when the content of alkyl glycoside is too large, due to the low freezing point of alkyl glycoside, the low temperature stability of the concentrated detergent will decrease, and turbidity will easily appear at low temperatures. Controlling the mass content of alkyl glycoside within the range of 2 to 5% is conducive to maintaining a stable viscosity of the concentrated detergent within the temperature range of daily use, while having good low temperature antifreeze properties. Furthermore, the anionic surfactant includes at least one of C12 to C18 fatty alcohol polyoxyethylene ether sodium sulfate, linear alkylbenzene sulfonate, C14 to C18 fatty acid methyl ester sulfonate and α-olefin sulfonate.

Furthermore, the zwitterionic surfactant includes lauric acid amide propyl betaine and/or an amino acid surfactant.

The lauric acid amidopropyl betaine and the amino acid surfactant have good low irritation and bactericidal properties, and are friendly to low temperature stability. Moreover, when the detergent composition of the present invention is used for fabrics, the two zwitterionic surfactants can be well compatible with other surfactants to effectively improve the softening performance of the fabrics.

Furthermore, in the concentrated cleaning composition, the mass content of the nonionic surfactant is 1 to 40%, the mass content of the anionic surfactant is 1 to 40%, and the mass content of the zwitterionic surfactant is 1 to 20%.

Furthermore, the weight ratio of the nonionic surfactant to the anionic surfactant is greater than 1:2.1.

The present invention team found that when the ratio of the amount of nonionic surfactant to anionic surfactant in the formula increases, the rheological properties of the concentrated detergent are improved by the rheological modifier. The reason is speculated to be that hydroxypropyl guar gum reduces the effect of hydrogen bonding between the surfactant and water by introducing hydroxypropyl side chains, thereby improving the rheological properties of the concentrated detergent, and the water solubility of the nonionic surfactant is the combination of the ether oxygen atom and water through hydrogen bonding. One ether oxygen atom can bind 20 to 30 water molecules. The more polyoxyethylene units in the molecule, the better the water solubility. The hydrophilicity of alkyl glycosides also comes from the hydrogen bonds formed by hydroxyl groups. Therefore, the greater the amount of nonionic surfactant in the formula, the more obvious the improvement of the rheological properties of the high-active substance solution by the rheological modifier.

Preferably, the functional additives include at least one of softening agents, enzyme preparations, cosolvents, color protection agents, chelating agents, acid-base regulators, anti-redeposition agents, inorganic salts, sunscreens, preservatives, defoamers, antibacterial agents and pigments.

Preferably, the concentrated cleaning composition is a concentrated cleaning composition for fabrics.

Compared with the prior art, the present invention has the following advantages:

(1) Component a and component b are compounded in a specific ratio as rheology modifiers, and the two can exert a synergistic effect of "1+1>2" to enable the concentrated detergent to maintain a relatively stable viscosity within the temperature range of daily use;

(2) Adding nonionic surfactant alkyl polyglycoside and controlling the weight ratio of nonionic surfactant to anionic surfactant can enhance the effect of rheology modifier on improving the rheological properties of concentrated detergent.

DETAILED DESCRIPTION

The present invention will be further described below in conjunction with embodiments.

In the following examples, the viscosity mentioned is the dynamic viscosity. The experiment uses a rotational viscometer to test the viscosity of the concentrated detergent composition at different temperatures, and the unit is pa.s. The viscosity change rate refers to the rate of change of viscosity with temperature, that is, the ratio of the viscosity at 10°C divided by the viscosity at 40°C. The larger the value, the greater the viscosity change rate and the worse the rheological property.

Overall embodiment

A concentrated detergent composition comprising the following components in percentage by weight:

Surfactant 30-70%;

Rheology modifier 0.2-10%;

Functional additives 0-10%;

Fragrance 0-2%;

Water balance.

In the present invention, the rheology regulator comprises component a and component b, component a comprises hydroxypropyl guar gum, and component b comprises p-toluene sulfonate and/or isopropylbenzene sulfonate.

Preferably, the weight ratio of component a to component b is 1:1.2-5.

Preferably, the surfactant is a compound of a nonionic surfactant, an anionic surfactant and a zwitterionic surfactant. The nonionic surfactant includes _C8 - _C18 fatty alcohol polyoxyethylene ether and/or _C8 - _C14 alkyl glycoside; the anionic surfactant includes at least one of _C12 - _C18 fatty alcohol polyoxyethylene ether sodium sulfate, linear alkylbenzene sulfonate, _C14 - _C18 fatty acid methyl ester sulfonate and α-olefin sulfonate; the zwitterionic surfactant includes lauric acid amidopropyl betaine and/or an amino acid surfactant.

Furthermore, in the concentrated cleaning composition, the mass content of the alkyl glycoside is 2-5%.

Furthermore, in the concentrated cleaning composition, the mass content of the nonionic surfactant is 1 to 40%, the mass content of the anionic surfactant is 1 to 40%, and the mass content of the zwitterionic surfactant is 1 to 20%.

Preferably, the functional additives include at least one of softening aids, enzyme preparations, cosolvents, color protection aids, chelating agents, acid-base regulators, anti-redeposition agents, inorganic salts, sunscreens, preservatives, defoamers, antibacterial agents and pigments.

Preferably, the concentrated cleaning composition of the present invention is a concentrated cleaning composition for fabrics.

Specific embodiments

Examples 1 to 3 and Comparative Examples 1 to 15

According to the formulations in Tables 1 to 3 below, the concentrated detergent compositions of Examples 1 to 3 and Comparative Examples 1 to 15 were prepared by the following steps:

(1) Mix deionized water, zwitterionic surfactant and anionic surfactant in proportion and stir evenly at 45-48° C.;

(2) cooling the solution to room temperature, adding a rheology modifier and a nonionic surfactant to the solution prepared in step (1) in sequence, and mixing and stirring until the solution is uniform and completely dissolved;

(3) Cooling the solution to room temperature, adding functional additives to the solution prepared in step (2) in sequence, mixing and stirring until the solution is uniform, and adjusting the pH of the solution to 8.0-9.0 to obtain a concentrated detergent composition.

In Tables 1 to 3, the content of each component is in weight percentage, and the balance is water; the amount not filled in means that the addition amount is 0.

The concentrated detergents of Examples 1 to 3 and Comparative Examples 1 to 15 were tested for performance, and the results are shown in Tables 1 to 3. The detergency was tested according to the national standard GB/T 13174-2008 "Determination of detergency and cyclic washing performance of detergents for clothing", with the national standard laundry detergent as the reference standard. Since the product is a concentrated laundry detergent, the test dosage is 0.7 g/L according to the active matter content.

Table 1

Table 2

Table 3

From Tables 1 to 3 we can see that:

(1) No rheology modifier was added in Comparative Examples 3, 8, and 13, while a rheology modifier was added in Examples 1 to 3, and the remaining components and preparation methods were the same as those of Comparative Examples 2, 4, and 6. Compared with Comparative Examples 2, 4, and 6, the viscosity change rate of Examples 1 to 3 was significantly lower.

(2) In Examples 1 to 3, component a (hydroxypropyl guar gum) and component b (sodium salt of xylene sulfonate and sodium salt of isopropylbenzene sulfonate) are compounded as rheology modifiers. In Comparative Examples 4, 9, and 14, only component a is used, and the total amount of rheology modifier is the same as that in Examples 1 to 3; in Comparative Examples 5, 10, and 15, only component b is used, and the total amount of rheology modifier is the same as that in Examples 1 to 3. The viscosity change rate of Examples 1 to 3 is significantly lower than that of the corresponding Comparative Examples, indicating that component a and component b can cooperate with each other to exert a synergistic effect of "1+1>2", which is beneficial for the concentrated detergent to maintain a relatively stable viscosity within the temperature range of daily use.

(3) The rheology modifiers used in Comparative Examples 1, 6, and 11 have a usage ratio of component a to component b of less than 1:5, and the components and preparation methods are the same as those of Examples 1 to 3. The viscosity change rates of Comparative Examples 1, 6, and 11 are higher than those of Examples 1 to 3, and even higher than those of Comparative Examples 3, 8, and 13 to which no rheology modifier is added; in addition, compared with Examples 1 to 3 and Comparative Examples 3, 8, and 13, the low temperature stability of Comparative Examples 1, 6, and 11 is also reduced, and turbidity occurs at 0°C and -5°C.

(4) The rheology modifiers used in Comparative Examples 2, 7, and 12 have a dosage ratio of component a to component b greater than 1:1.2, and the components and preparation methods are the same as those of Examples 1 to 3. The viscosity change rates of Comparative Examples 2, 7, and 12 are higher than those of Examples 1 to 3, and even higher than those of Comparative Examples 3, 8, and 13 without adding rheology modifiers; in addition, compared with Examples 1 to 3 and Comparative Examples 3, 8, and 13, the low-temperature stability of Comparative Examples 2, 7, and 12 is also reduced, and turbidity occurs at 0°C and -5°C.

(5) Examples 1 to 3 all have good detergency, which is better than the national standard for detergency of detergents for clothing.

Examples 4 to 6 and Comparative Examples 16 to 18

According to the formula in Table 4 below, the concentrated detergent compositions of Examples 4 to 6 and Comparative Examples 16 to 18 were prepared by the following steps:

(1) Mix deionized water, zwitterionic surfactant and anionic surfactant in proportion and stir evenly at 45-48° C.;

(2) cooling the solution to room temperature, adding a rheology modifier and a nonionic surfactant to the solution prepared in step (1) in sequence, and mixing and stirring until the solution is uniform and completely dissolved;

(3) Cooling the solution to room temperature, adding functional additives to the solution prepared in step (2) in sequence, mixing and stirring until the solution is uniform, and adjusting the pH of the solution to 8.0-9.0 to obtain a concentrated detergent composition.

In Table 4, the content of each component is weight percentage, and the balance is water; the amount not filled in means that the addition amount is 0.

The concentrated detergents of Examples 4 to 6 and Comparative Examples 16 to 18 were tested for performance, and the results are shown in Table 4. The detergency was tested according to the national standard GB/T 13174-2008 "Determination of detergency and cyclic washing performance of detergents for clothing", with the national standard laundry detergent as the reference standard. Since the product is a concentrated laundry detergent, the test dosage is 0.5 g/L according to the active matter content.

Table 4

In Examples 4 to 6, the total amount of surfactants is the same, the amount of nonionic surfactant AEO-9 is decreased, and the total amount of anionic surfactants LAS and AES is increased; in Comparative Examples 16 to 18, no rheology modifier is added, and the remaining components and preparation methods are the same as in Examples 4 to 6. From the viscosity change rate of the concentrated detergent in Table 4, when the amount ratio of the nonionic surfactant to the anionic surfactant increases, the rheology modifier improves the rheological properties of the concentrated detergent.

Examples 7 to 10 and Comparative Examples 19 to 22

According to the formula of Table 5 below, the concentrated detergent compositions of Examples 7 to 10 and Comparative Examples 19 to 22 were prepared by the following steps:

(1) Mix deionized water, zwitterionic surfactant and anionic surfactant in proportion and stir evenly at 45-48° C.;

(2) cooling the solution to room temperature, adding a rheology modifier and a nonionic surfactant to the solution prepared in step (1) in sequence, and mixing and stirring until the solution is uniform and completely dissolved;

(3) Cooling the solution to room temperature, adding functional additives to the solution prepared in step (2) in sequence, mixing and stirring until the solution is uniform, and adjusting the pH of the solution to 8.0-9.0 to obtain a concentrated detergent composition.

In Table 5, the content of each component is weight percentage, and the balance is water; the amount not filled in means that the addition amount is 0.

The concentrated detergents of Examples 7 to 10 and Comparative Examples 19 to 22 were tested for performance, and the results are shown in Table 5. The detergency was tested according to the national standard GB/T 13174-2008 "Determination of detergency and cyclic washing performance of detergents for clothing", with the national standard laundry detergent as the reference standard. Since the product is a concentrated laundry detergent, the test dosage is 0.4 g/L according to the active matter content.

Table 5

In Examples 7-10, the amount of nonionic surfactant alkyl polyglycoside is increased; in Comparative Examples 19-22, no rheology modifier is added, and the remaining components and preparation methods are the same as in Examples 7-10. From the viscosity change rate of the concentrated detergent in Table 5, as the amount of nonionic surfactant alkyl polyglycoside increases, the rheology modifier improves the rheological properties of the concentrated detergent. However, when the amount of alkyl polyglycoside is increased to 11% (Example 10), although the effect of the rheology modifier in the formula is better, the low-temperature stability will be reduced, and turbidity will appear at -5°C and 0°C. This is mainly due to the low freezing point of alkyl polyglycoside, which will affect the low-temperature antifreeze property of the formula when used in an increased amount.

Stability evaluation

The stability of the concentrated detergent compositions prepared in Examples 1 to 10 was evaluated, respectively:

(1) Appearance observation.

(2) Place the samples in a constant temperature and humidity chamber at -5°C, 2°C and 45°C for 30 days and observe the changes in the samples. If the samples appear normal in appearance, they are qualified.

(3) Subject the samples to a freeze-thaw test, place them in a -18°C environment for 24 hours, then return them to room temperature and observe whether the samples can recover within 24 hours. If they can, they are qualified.

The experimental results are shown in Table 6.

Table 6

As can be seen from Table 6, the concentrated detergent of the present invention has a qualified appearance and good low-temperature and high-temperature stability.

The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims (9)

1. A concentrated detergent composition, characterized in that it comprises the following components: Surfactants; Rheology regulator; the rheology regulator comprises component a and component b in a mass ratio of 1:1.2-5, the component a comprises hydroxypropyl guar gum, and the component b comprises xylene sulfonate and/or isopropylbenzene sulfonate; water. 2. A concentrated detergent composition according to claim 1, characterized in that it comprises the following components in weight percentage: Surfactant 30~70%; Rheology regulator 0.2~10%; Functional additives 0~10%; Fragrance 0~2%; Water balance. 3. A concentrated detergent composition according to claim 1, characterized in that the surfactant is a compound of a nonionic surfactant, an anionic surfactant and a zwitterionic surfactant. 4. A concentrated detergent composition according to claim 3, characterized in that the nonionic surfactant comprises _C8 - _C18 fatty alcohol polyoxyethylene ether and/or _C8 - _C14 alkyl glycoside. 5. The concentrated detergent composition according to claim 4, characterized in that, in the concentrated detergent composition, the mass content of the alkyl glycoside is 2-5%. 6. A concentrated detergent composition according to claim 3, characterized in that the zwitterionic surfactant comprises lauric acid amidopropyl betaine and/or an amino acid surfactant. 7. A concentrated detergent composition according to claim 3, characterized in that the mass content of the nonionic surfactant is 1-40%; the mass content of the anionic surfactant is 1-40%; and the mass content of the zwitterionic surfactant is 1-20%. 8. A concentrated detergent composition according to claim 3, characterized in that the weight ratio of the nonionic surfactant to the anionic surfactant is greater than 1:2.1. 9. A concentrated detergent composition according to any one of claims 1 to 8, characterized in that the concentrated detergent composition is a concentrated detergent composition for fabrics.