Liquid detergent compositions and their use

Abstract

The present application discloses liquid detergent composition and its application, which comprises (a) lauroyl alanine salt, (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether, (c) water, wherein the lauroyl alanine salt is the main surfactant, the weight percentage in all surfactants is more than 50wt%; the detergent composition does not contain alkyl sulfate, alkyl ether sulfate and the like, is very mild, and belongs to a new environment-friendly and safe detergent.

Description

Liquid Detergent Composition and Its Application Technical Field The present invention relates to the technical field of detergents, and particularly relates to a detergent composition containing lauroyl alaninate as the main surfactant, and its application in products such as laundry detergents. Background Art Conventionally, anionic surfactants such as alkyl sulfates and polyoxyethylene alkyl sulfates have been widely used as surfactants for cleaning bases. However, sometimes they may cause a feeling of dryness and irritation, so there is a need for detergents with less irritation. In addition, these are petroleum-derived surfactants, which are contrary to the current orientation of sustainable development and environmental protection. I. Alkyl Sulfate Surfactants Alkyl sulfate surfactants have comprehensive advantages such as low price and satisfactory cleaning and foaming properties. However, as described in EP3582748A1, it is known that surfactants containing sulfates (such as SLS) are prone to cause tolerance problems, especially on the skin and eyes. Another disadvantage of surfactants containing sulfates is their tendency to strip the natural oils, fats or proteins contained on the surface of the skin, scalp or hair. In the long run, repeated use of cleaning products containing alkyl sulfate surfactants may cause irritation to the skin or scalp and / or damage to hair fibers. II. Alkyl Ether Sulfates Sodium lauryl ether sulfate (SLES or AES) has strong detergency and can be easily thickened by adding sodium chloride (although it is convenient to thicken by adding a large amount of sodium chloride, the irritation of sodium chloride to the eyes is usually underestimated), so it is widely used. Although it is milder than alkyl sulfates, it still has moderate irritation (see GB2598154A). In addition, it has safety problems (dioxane contained in the surfactant is carcinogenic). III. Amino Acid Surfactants The cosmetics and personal care industries have confirmed the increasing popularity and importance of "sulfate-free" and "dioxane-free" personal care cleaning products containing environmentally friendly, sustainable and mild surfactants. Amino acid-based surfactants are considered to be more "green", milder and more sustainable than traditional petroleum-based surfactants. Developing high-quality environmentally friendly surfactants has become the main direction of the surfactant industry. The replacement of traditional petroleum-based surfactants by amino acid surfactants is the trend of industry development. Unilever announced that it will halve the use of petroleum-based products by 2025 and phase them out by 2030. L'Oréal, on the other hand, announced that by 2030, 95% of its petroleum-based products will be replaced. Therefore, it is very necessary to study the formulation system with amino acid surfactants as the main surfactant. SUMMARY OF THE INVENTION In view of the above, the object of the present invention is to provide a liquid detergent composition which uses lauroyl alaninate as the main surfactant and can meet the requirements of applications such as fabric washing, dishwashing, and fruit and vegetable washing on the premise of being safe, environmentally friendly and low-irritating. Specifically, the solution of the present invention is as follows. [1] A liquid detergent composition comprising component (a) lauroyl alaninate, (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether, and (c) water, wherein lauroyl alaninate is the main surfactant. Preferably, its weight percentage content among all surfactants exceeds 50 wt%, preferably exceeds 60 wt%, and more preferably exceeds 70 wt%. [2] The detergent composition according to [1], wherein the detergent composition is substantially free of alkyl sulfates, preferably completely free of alkyl sulfates. [3] The detergent composition according to any one of [1]-[2], wherein the detergent composition is substantially free of sulfonates, preferably completely free of sulfonates. [4] The detergent composition according to any one of [1]-[3], wherein the detergent composition is substantially free of alkyl ether sulfates, preferably completely free of alkyl ether sulfates. [5] The detergent composition according to any one of [1]-[4], wherein the detergent composition is substantially free of fatty acid salts, preferably completely free of fatty acid salts. [6] The detergent composition according to any one of [1]-[5], wherein component (a) lauroyl alaninate is formed from lauroyl alanine and a base. [7] The detergent composition according to [6], wherein the base is selected from one or more of inorganic bases, organic amines, and basic amino acids. [8] The detergent composition according to [7], wherein the inorganic base is selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine. [9] The detergent composition according to any one of [1]-[8], wherein component (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether is obtained by condensing an alkanol having a straight-chain or branched-chain structure containing 8 to 18 carbon atoms with 5 to 30 moles of ethylene oxide.

[0010] The detergent composition according to any one of [1]-[9], wherein component (b) is selected from one or more of AEO-5, AEO-7, and AEO-9, and most preferably AEO-9.

[0011] The detergent composition according to any one of [1]-

[0010] , component (a) accounts for 5-50 wt% of the composition, preferably 8-35 wt%, more preferably 10-25 wt%.

[0012] The detergent composition according to any one of [1]-

[0011] , component (b) accounts for 1-8 wt% of the composition, preferably 2-6 wt%, more preferably 3-5 wt%.

[0013] The detergent composition according to any one of [1]-

[0012] , component (b) is a secondary surfactant, and its content in the surfactant is only lower than that of the main surfactant.

[0014] The detergent composition according to any one of [1]-

[0013] , the composition further comprises (d) lauroyl alanyl alaninate.

[0015] The detergent composition according to any one of

[0014] , (d) lauroyl alanyl alaninate is formed by lauroyl alanyl alanine and a base, and the base is selected from one or more of inorganic bases, organic amines, and basic amino acids; the inorganic bases are selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine.

[0016] The detergent composition according to any one of

[0014] -

[0015] , the weight percentage content of (d) lauroyl alanyl alaninate in the composition is above 0.1 wt%, preferably above 0.3 wt%, more preferably above 0.5 wt%.

[0017] The detergent composition according to any one of

[0014] -

[0016] , the weight ratio of (a) lauroyl alaninate to (d) lauroyl alanyl alaninate is 20:1 to 3:1, preferably 15:1 to 6:1.

[0018] The detergent composition according to any one of [1]-

[0017] , component (a) lauroyl alaninate comprises (a1) lauroyl alanine inorganic base salt and (a2) lauroyl alanine basic amino acid salt; the (a1) lauroyl alanine inorganic base salt is obtained by reacting lauroyl alanine with an inorganic base; the (a2) lauroyl alanine basic amino acid salt is obtained by reacting lauroyl alanine with a basic amino acid.

[0019] The detergent composition according to any one of [1]-

[0018] , the content of (a1) in component (a) is ≥50 wt%, preferably ≥60 wt%, and the content of (a2) is ≤50 wt%, preferably ≤40 wt%.

[0020] The detergent composition according to any one of

[0014] -

[0019] , wherein component (d) lauroyl alanyl alaninate comprises (d1) an inorganic base salt of lauroyl alanyl alanine and (d2) a basic amino acid salt of lauroyl alanyl alanine; the (d1) inorganic base salt of lauroyl alanyl alanine is obtained by reacting lauroyl alanyl alanine with an inorganic base; the (d2) basic amino acid salt of lauroyl alanyl alanine is obtained by reacting lauroyl alanyl alanine with a basic amino acid.

[0021] In the detergent composition according to any one of

[0014] -

[0020] , the content of (d1) in component (d) is ≥50 wt%, preferably ≥60 wt%, and the content of (d2) is ≤50 wt%, preferably ≤40 wt%.

[0022] In the detergent composition according to any one of [1]-

[0021] , the pH of the composition is 5-7.5, preferably 5.5-6.9, more preferably 6-6.5.

[0023] In the detergent composition according to any one of [1]-

[0022] , the composition is of low viscosity, and the low viscosity means that the viscosity at 25 °C is lower than 150 mPa·s, preferably lower than 120 mPa·s, more preferably lower than 100 mPa·s.

[0024] In the detergent composition according to any one of [1]-

[0023] , the detergency of the specified soiled cloth of the composition, when detected according to QB / T1224-2012 Liquid Detergent for Clothing, is above 1.0 for JB-01; above 1.0 for JB-02; above 1.0 for JB-03.

[0025] Use of the detergent composition according to any one of [1]-

[0024] , wherein the detergent composition is used for fabric washing.

[0026] A liquid laundry detergent, which comprises the detergent composition according to any one of [1]-

[0024] . Compared with the prior art, the present invention has beneficial technical effects: Using lauroyl alaninate as the main surfactant enables the detergent composition to have properties such as low irritation, high cleaning / detergency, easy rinsing, and non-greasiness, and can meet the application requirements in products such as liquid laundry detergents. Detailed Embodiments A liquid detergent composition is provided. The composition comprises component (a) lauroyl alaninate, (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether, and (c) water. In the detergent composition, lauroyl alaninate is the main surfactant, and preferably its weight percentage content in all surfactants exceeds 50 wt%. The so-called main surfactant means that, in terms of weight percentage content, this surfactant has the highest content among all surfactants. Further, the weight percentage content of the main surfactant in all surfactants exceeds 50 wt%, preferably exceeds 60 wt%, more preferably exceeds 70 wt%; for example, it exceeds 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt%, 95 wt%. For component (a), it is formed by reacting lauroyl alanine with a base. Those skilled in the art can understand that whether lauroyl alanine and the base are separately and independently added to the composition or the lauroyl alaninate is first formed by reaction and then added to the composition, there is no essential difference, and it is also covered within the scope expressed by "lauroyl alaninate". The base is selected from one or more of inorganic bases, organic amines, and basic amino acids. The inorganic base is selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine. In one embodiment, component (a) is an inorganic base salt of lauroyl alanine (i.e., 100% inorganic base salt of lauroyl alanine). In another embodiment, component (a) is a basic amino acid salt of lauroyl alanine (i.e., 100% basic amino acid salt of lauroyl alanine). In yet another embodiment, the lauroyl alaninate of component (a) comprises (a1) an inorganic base salt of lauroyl alanine and (a2) a basic amino acid salt of lauroyl alanine. The (a1) inorganic base salt of lauroyl alanine is obtained by reacting lauroyl alanine with an inorganic base; the (a2) basic amino acid salt of lauroyl alanine is obtained by reacting lauroyl alanine with a basic amino acid. The inorganic base and the basic amino acid are as defined above. Further, in component (a), the content of (a1) is ≥50 wt%, preferably ≥60 wt%, and the content of (a2) is ≤50 wt%, preferably ≤40 wt%. For example, the content of (a1) is 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, 60 wt%, 61 wt%, 62 wt%, 63 wt%, 64 wt%, 65 wt%, 66 wt%, 67 wt%, 68 wt%, 69 wt%, 70%, 71 wt%, 72 wt%, 73 wt%, 74 wt%, 75 wt%, 76 wt%, 77 wt%, 78 wt%, 79 wt%, 80%... 99%; correspondingly, the balance is (a2). Component (a) accounts for 5 - 50 wt% of the composition, preferably 8 - 35 wt%, more preferably 10 - 25 wt%. For example, it can be 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%... 50 wt%. The synthesis process of lauroyl alanine can refer to the general synthesis methods of N-acyl amino acid surfactants, which are divided into direct method and indirect method. The direct synthesis method from fatty acid raw materials includes enzymatic catalysis synthesis and dehydration condensation. The indirect synthesis methods include fatty acyl chloride acylation, fatty nitrile hydrolysis acylation, fatty acid anhydride acylation, amide carbonylation reaction, etc. More preferably, it is prepared by the reaction of fatty acyl chloride with the amino group of amino acid (Shotten-Baumann condensation reaction or Schotten-Baumann reaction). For component (b), fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether is obtained by condensing alkanol with 8 to 18 carbon atoms in a straight-chain or branched-chain structure with 5 to 30 moles of ethylene oxide. Preferred in the present invention is one or more of AEO-5, AEO-7, AEO-9, and most preferably AEO-9. Component (b) accounts for 1 - 8 wt% of the composition, for example, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%. In one embodiment, component (b) is a secondary surfactant, and its content in the surfactant is only lower than that of the main surfactant. For component (c), there is no particular limitation. Specifically, ion-exchanged water, distilled water, purified water, river water, well water, natural water, groundwater, city water, hard water, soft water, etc. can be used. One of these can be used, or two or more selected from the above groups can be used in combination. From the viewpoints of storage stability and hygiene of the product of the present invention, ion-exchanged water, distilled water, and purified water are preferred. In one embodiment, it further comprises component (d) lauroyl alanyl alanine salt. (d) Lauroyl alanyl alanine salt is formed by lauroyl alanyl alanine and a base, and the base is selected from one or more of inorganic bases, organic amines, and basic amino acids; the inorganic bases are selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine. In one embodiment, component (d) is a lauroyl alanyl alanine inorganic base salt (i.e., 100% lauroyl alanyl alanine inorganic base salt). In another embodiment, component (d) is a lauroyl alanyl alanine basic amino acid salt (i.e., 100% lauroyl alanyl alanine basic amino acid salt). In yet another embodiment, the lauroyl alanyl alanine salt of component (d) comprises (d1) lauroyl alanyl alanine inorganic base salt and (d2) lauroyl alanyl alanine basic amino acid salt; the (d1) lauroyl alanyl alanine inorganic base salt is obtained by reacting lauroyl alanyl alanine with an inorganic base; the (d2) lauroyl alanyl alanine basic amino acid salt is obtained by reacting lauroyl alanyl alanine with a basic amino acid. The inorganic base and the basic amino acid are as defined above. Furthermore, in component (d), the content of (d1) is ≥50 wt%, preferably ≥60 wt%, and the content of (d2) is ≤50 wt%, preferably ≤40 wt%. The weight percentage content of (d) lauroyl alanyl alanine salt in the composition is above 0.1 wt%, preferably above 0.3 wt%, more preferably above 0.5 wt%. The weight ratio of (a) lauroyl alanine salt to (d) lauroyl alanyl alanine salt is from 20:1 to 3:1, preferably from 15:1 to 6:1. For example, the weight ratio is 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3. Lauroyl alanyl alanine can be synthesized by conventional methods, such as prepared by the Schotten-Baumann reaction of an acyl chloride derived from an N-long-chain acyl amino acid and an amino acid; or by reacting an amino acid dipeptide such as glutamyl glutamate with an acyl chloride, and other publicly disclosed methods can also be used, for example, see CN100448968C, PCT / CN2022 / 107270, etc. The composition may further comprise component (e) a fragrance or flavor. In the present invention, a fragrance or flavor with better water solubility is particularly preferred. In addition, the composition of the present invention may optionally further comprise other components, such as dyes, chelating agents, extracts, amino acids, nucleic acids, vitamins, enzymes, anti-inflammatory agents, fungicides, antioxidants, ultraviolet absorbers, antiperspirants, pH regulators, pearlescent agents, etc., provided that the other components do not conflict with the safety, environmental protection, low irritation (skin / eye), easy rinsing, and refreshing washing feeling pursued by the present invention. Alkyl sulfate surfactants: Sodium lauryl sulfate (SLS) and ammonium lauryl sulfate (ALS) can be cited. Considering that they may cause irritation to the skin, therefore, the composition of the present invention preferably substantially does not contain alkyl sulfate surfactants, and more preferably completely does not contain alkyl sulfate surfactants. Alkyl ether sulfates: Typically sodium lauryl polyether sulfate (SLES or AES). Considering its moderate irritation and safety issues (the dioxane impurity it contains is carcinogenic), therefore, the composition of the present invention preferably contains substantially no alkyl ether sulfates, and more preferably contains no alkyl ether sulfates at all. Fatty acid salts: Laurate, myristate, palmitate, stearate can be listed. Considering the sense of post-washing tension, dryness, and tightness brought by such raw materials, the composition of the present invention preferably contains substantially no fatty acid salts, and more preferably contains no fatty acid salts at all. In the above embodiments, the composition of the present invention can be further controlled to be weakly acidic to weakly alkaline, preferably weakly acidic, that is, the pH of the composition is 5 - 7.5, preferably 5.5 - 6.9, more preferably 6 - 6.7. Exemplarily, suitable pH values can be 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5. In the above embodiments, the composition of the present invention can be of low viscosity. The low viscosity means that the viscosity at 25 °C is lower than 150 mPa·s, preferably lower than 120 mPa·s, more preferably lower than 100 mPa·s. The lower limit of the viscosity is not particularly limited, and values above 1 mPa·s can be listed. The viscosity can be measured by conventional methods. For example, for the composition at 25 °C, a Brookfield viscometer can be used for measurement. Of course, the composition of the present invention can also be thickened to form a product with a certain viscosity. In the above embodiments, the composition of the present invention further exhibits strong detergency performance, that is, when tested according to QB / T1224 - 2012 Liquid Detergents for Clothing, JB - 01, JB - 02, and JB - 03 can all exceed 1. The composition of the present invention can be used for fabric washing, dishwashing, fruit and vegetable washing, etc. Therefore, the present invention can provide laundry detergents, dishwashing liquids, and fruit and vegetable cleaning agents containing the aforementioned composition. Particularly preferably, the composition of the present invention can be used for fabric washing as a laundry detergent. In each embodiment, for the detailed situations, type selections, dosage selections, etc. that are not discussed, they can refer to the relevant guidance of other embodiments when there is no conflict in content. For the sake of brevity, each embodiment does not elaborate one by one. As used herein, "substantially free of" means that the content of this substance in the composition will not significantly and substantially affect the performance of the product. Further, "substantially free of" means that the weight percentage of this substance in the composition is less than 0.5 wt%, preferably less than 0.1 wt% or less than 0.01 wt%, and more preferably less than the detectable limit. Unless otherwise specified, "above", "below", and "A to B" in the present invention all include the recited number. The dosage refers to the dosage of the specific substance, rather than the dosage of its corresponding solution (if any). The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalents also fall within the scope defined by the appended claims of this application. The present invention will be further described below in conjunction with specific embodiments. Embodiment Detection basis: Detection is carried out in accordance with QB / T1224-2012 Liquid Detergents for Clothing. Table 1 (The contents in the table all refer to the weight percentages in the detergent composition) According to the data in Table 1, the combination of lauroyl alaninate and fatty alcohol polyoxyethylene ether has strong detergency, and JB-01, JB-02, and JB-03 all exceed 1. In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments.

Claims

1. A liquid detergent composition, characterized in that, Comprising (a) lauroyl alaninate, (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether, and (c) water, wherein the lauroyl alaninate is the main surfactant.

2. The detergent composition according to claim 1, wherein The weight percentage of lauroyl alaninate in all surfactants exceeds 50 wt%, preferably exceeds 60 wt%, and more preferably exceeds 70 wt%.

3. The detergent composition according to claim 1, characterized in that, The detergent composition is substantially free of alkyl sulfates, preferably completely free of alkyl sulfates; and / or, substantially free of sulfonates, preferably completely free of sulfonates; and / or, substantially free of alkyl ether sulfates, preferably completely free of alkyl ether sulfates.

4. The detergent composition according to any one of claims 1-3, characterized in that, Component (a) lauroyl alaninate is formed from lauroyl alanine and a base selected from one or more of inorganic bases, organic amines, and basic amino acids; the inorganic bases are selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine.

5. The detergent composition according to any one of claims 1 to 3, characterized in that, Component (b) fatty alcohol polyoxyethylene ether or branched fatty alcohol polyoxyethylene ether is obtained by condensing an alkanol having a straight-chain or branched structure containing 8 to 18 carbon atoms with 5 to 30 moles of ethylene oxide. Preferably, component (b) is selected from one or more of AEO-5, AEO-7, and AEO-9, and most preferably AEO-9.

6. The detergent composition according to any one of claims 1 to 3, characterized in that, Component (a) accounts for 5-50 wt% of the composition, preferably 8-35 wt%, and more preferably 10-25 wt%; and / or, component (b) accounts for 1-8 wt% of the composition, preferably 2-6 wt%, and more preferably 3-5 wt%.

7. The detergent composition according to any one of claims 1 to 3, characterized in that, The composition further comprises (d) lauroyl alanyl alaninate.

8. The detergent composition according to claim 7, wherein (d) Lauroyl alanyl alaninate is formed from lauroyl alanyl alanine and a base selected from one or more of inorganic bases, organic amines, and basic amino acids; the inorganic bases are selected from one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, preferably sodium hydroxide or potassium hydroxide; the organic amines are selected from amines and alkanolamines; the basic amino acids are selected from one or more of arginine, lysine, and histidine, preferably arginine or lysine.

9. The detergent composition according to claim 7, wherein (d) The weight percentage of lauroyl alanyl alaninate in the composition is above 0.1 wt%, preferably above 0.3 wt%, and more preferably above 0.5 wt%; and / or, the weight ratio of (a) lauroyl alaninate to (d) lauroyl alanyl alaninate is 20:1 to 3:1, preferably 15:1 to 6:

1.

10. The detergent composition according to any one of claims 1-3, characterized in that, Component (a) lauroyl alaninate comprises (a1) lauroyl alanine inorganic base salt and (a2) lauroyl alanine basic amino acid salt; the (a1) lauroyl alanine inorganic base salt is obtained by reacting lauroyl alanine with an inorganic base; the (a2) lauroyl alanine basic amino acid salt is obtained by reacting lauroyl alanine with a basic amino acid.

11. The detergent composition according to claim 10, characterized in that, In component (a), the content of (a1) is ≥50 wt%, preferably ≥60 wt%, and the content of (a2) is ≤50 wt%, preferably ≤40 wt%.

12. The detergent composition according to claim 7, characterized in that, Component (d) lauroyl alanylalaninate comprises (d1) an inorganic base salt of lauroyl alanylalanine and (d2) a basic amino acid salt of lauroyl alanylalanine; the said (d1) inorganic base salt of lauroyl alanylalanine is obtained by reacting lauroyl alanylalanine with an inorganic base; the said (d2) basic amino acid salt of lauroyl alanylalanine is obtained by reacting lauroyl alanylalanine with a basic amino acid.

13. The detergent composition according to any one of claims 1 to 3, characterized in that, The pH of the composition is 5 to 7.5, preferably 5.5 to 6.9, more preferably 6 to 6.5; and / or, the composition has a low viscosity, and the said low viscosity means that the viscosity at 25 °C is lower than 150 mPa·s, preferably lower than 120 mPa·s, more preferably lower than 100 mPa·s; and / or, for the specified stain removal power of the composition, when detected according to QB / T1224-2012 Liquid Detergents for Clothing, the stain removal power for JB-01 is above 1.0; for JB-02 is above 1.0; for JB-03 is above 1.

0.

14. Use of the detergent composition according to any one of claims 1-13, characterized in that, The said detergent composition is used for fabric washing.

15. A laundry detergent, characterized in that, The laundry detergent comprises the detergent composition according to any one of claims 1-13.