Detergency booster, process for its preparation and use thereof

Abstract

The present application relates to a kind of decontamination synergist and its preparation method and application, belong to daily chemical technology field.The decontamination synergist of the present application includes the following components by mass percentage:5-30% non-ionic surfactant, 1-20% cationic polymer, 5-45% green chelating agent and the balance solvent;The non-ionic surfactant is isomeric alcohol polyoxyethylene ether, the cationic polymer is cationic polyester polyether block copolymer, the green chelating agent is amino acid derivative, and the solvent is alcohol solvent.The decontamination synergist digs the decontamination synergism principle, multi-dimension compound different substances synergism, has excellent penetration, chelation, dispersion effect, has significant decontamination synergism effect to laundry detergent etc., can significantly improve the decontamination effect of detergent, reduce the amount of detergent, while reducing the environmental pollution caused by chemical detergent in waste water, has higher application value in daily chemical field.

Description

Technical Field

[0001] The present invention relates to the technical field of daily chemicals, and in particular to a detergent synergist, a preparation method and application thereof. Background Art

[0002] Detergents are formulated for the purpose of removing dirt. With improvements in living standards and changes in modern lifestyles, demand for detergents is growing. However, detergents are mostly synthetic organic compounds. The phosphorus-containing wastewater from these compounds, when discharged into rivers and lakes, can cause eutrophication, seriously impacting water safety and the growth of aquatic plants and animals.

[0003] With economic development, my country is increasingly advocating for green development, accelerating its progress, and guiding green consumption. In recent years, the development and production of multi-functional, energy-saving, water-saving, and environmentally friendly surfactants, additives, and detergents have been listed as encouraged projects. How can detergent usage be reduced while still meeting the demand for cleaning? Detergent enhancers have emerged as a research hotspot.

[0004] Detergent boosters are products that improve the cleaning, stain removal, and descaling efficiency of detergents. They play a vital role in descaling, purifying water quality, and improving the water environment. Currently, detergent boosters have found applications in industry, household appliances, and environmental protection, and their importance is growing. However, the market is plagued by a mixed bag of quality, with some offering subpar results.

[0005] Therefore, developing a new, efficient detergent enhancer product to improve the detergent effect of laundry detergent and other detergents can significantly reduce the amount of detergent used, improve washing efficiency, and reduce the discharge of detergents in wastewater, which has high application value in the field of daily chemicals. Summary of the Invention

[0006] The present invention aims to overcome the shortcomings of the prior art and provide a detergent synergist, its preparation method, and its application. The detergent synergist provided by the present invention, by compounding specific components, has a significant detergent synergistic effect on detergents, which is superior to commercially available products and has high application value in daily chemical products.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] In the first aspect, the present invention provides a detergent enhancer, which comprises the following components, in mass percentage: 5-30% non-ionic surfactant, 1-20% cationic polymer, 5-45% green chelating agent and the remainder solvent; the non-ionic surfactant is an isomeric alcohol polyoxyethylene ether, the cationic polymer is a cationic polyester polyether block copolymer, the green chelating agent is an amino acid derivative, and the solvent is an alcohol solvent.

[0009] The present invention adopts a specific nonionic surfactant, a cationic polymer, a green chelating agent and a solvent in the above-mentioned combination ratio, which can play a good synergistic role and achieve the decontamination and synergistic effect of the detergent.

[0010] Wherein, nonionic surfactant has very high surface activity, has good solubilizing, washing, antistatic, calcium soap dispersion and other properties, is less irritating, and also has excellent wetting and washing function.Add a small amount of nonionic surfactant, the surface activity of this system can be improved, the surface tension of detergent can be significantly reduced.And the nonionic surfactant adopted in the present invention is the isomeric alcohol polyoxyethylene ether of special carbon chain, has more outstanding dispersibility, wettability, permeability, has excellent synergistic decontamination ability, particularly for carbon black stains, its combined use effect is significantly better than other nonionic surfactants.

[0011] Cationic polyester polyether block copolymers have positively charged heads, while some inorganic fine particles on the solid / fabric surface have negatively charged faces. Electrostatic attraction attracts these negatively charged faces, forming hydrophobic particles. Simultaneously, the large amounts of anionic surfactants in conventional detergents can interact with the hydrophobic groups of the cationic polyester polyether block copolymer adsorption layer through their hydrophobic groups, forming a double adsorption layer surrounding the particles. This "lifts" the inorganic fine particles (dirt, stains) remaining on or attached to the solid or fabric surface, ultimately forming "soluble particles" for removal during the washing process. Among all surfactant compounding systems, anionic-cationic surfactant compounding systems exhibit the strongest synergistic effects: due to the strong electrostatic interaction between their oppositely charged ionic head groups, they exhibit strong synergistic effects and high surface activity. The cationic polyester polyether block copolymers of the present invention, when used in detergents, can significantly enhance the detergent's ability to loosen and disperse stains, and are effective against carbon black stains, protein stains, and sebum stains. Furthermore, the effect of combining them with other components is significantly superior to that of conventional cationic polymers.

[0012] The green chelating agent is a substance that is safe for the human body and the environment, has biodegradability, and has chelating properties. Its functions are as follows: (1) For detergents containing fatty acids and soap, when used, they are very easy to form soap scum with calcium and magnesium ions in water, which is deposited on the surface of fabrics, resulting in a sour odor and reduced wettability. The green chelating agent can effectively solve the soap scum and prevent the redeposition of calcium soap; (2) After the detergent uses a phosphorus-free formula, the film-forming and stain removal performance of the detergent will decrease. The use of the green chelating agent can reduce the film-forming property of the detergent, thereby improving the stain removal performance; (3) The green chelating agent can convert insoluble compounds into water-soluble substances and has good solubility for inorganic precipitates. Using a small amount of the green chelating agent in the detergent can effectively improve the stain removal ability, especially for protein stains. The green chelating agent of the present invention is an amino acid derivative, has the characteristics of low toxicity and easy degradation, and meets the requirements for the use of green detergents.

[0013] Alcohol solvents can dissolve and disperse the nonionic surfactants, cationic surfactants, and green chelating agents described in the present invention; when used in detergents, they can reduce the formation of micelles between surfactants, indirectly improving the detergent's detergency; at the same time, they have good solubility for oils and fats, have the effect of loosening and dissolving grease stains, and assist detergents in achieving a decontamination effect and improving their decontamination ability, especially for sebum stains; and, because cationic polymers are easy to wrap into films and agglomerate and settle, when present in large quantities, they can inhibit other surfactants from achieving a decontamination effect. The dispersibility of the specific solvents of the present invention for cationic polymers helps alleviate this phenomenon. When other solvents are used, the decontamination synergistic effect may be significantly deteriorated.

[0014] The decontamination enhancer provided by the present invention has a different decontamination enhancement mechanism from conventional commercially available products. It deeply explores the decontamination enhancement principle and compounds different substances in multiple dimensions. It can assist surfactants in exerting their decontamination performance, has excellent penetration-aiding, chelating and dispersing effects, and achieves better synergistic effects of each component. It itself has high detergency, and adding a small amount of compounded conventional detergent can also have an excellent decontamination enhancement effect. It has high application value in daily chemical products.

[0015] Preferably, the detergency synergist comprises the following components by mass percentage: 15-30% nonionic surfactant, 5-15% cationic polymer, 15-45% green chelating agent and the balance solvent.

[0016] Preferably, the detergent synergist comprises the following components by mass percentage: 25-30% nonionic surfactant, 15% cationic polymer, 20-35% green chelating agent and the balance solvent.

[0017] Under the above-mentioned specific ratio, the components of the detergent enhancer of the present invention can exert a good synergistic effect, and can significantly improve the detergency of the detergent at an extremely low addition concentration, and the effect is significantly better than commercially available detergent enhancers.

[0018] Preferably, the nonionic surfactant is at least one of isomeric tridecanol polyoxyethylene ether, isomeric decanol polyoxyethylene ether, and isomeric undecanol polyoxyethylene ether.

[0019] Preferably, the cationic polyester polyether block copolymer conforms to the following structure (I):

[0020]

[0021] In the structure (I), R is CH3(CH2) 11 - or CH3(CH2) 17 -, 95≤n+m≤318.

[0022] The cationic polymer of the present invention is a cationic polyester polyether block copolymer, which is derived from the patent CN106380587A, and includes but is not limited to one or more cationic polyester polyether block copolymers prepared therein.

[0023] Preferably, the green chelating agent is at least one of methylglycine diacetic acid, trisodium methylglycine diacetate, tetrasodium aspartic acid diacetate, tetrasodium glutamate diacetate, tetrasodium iminodisuccinate, iron iminodisuccinate, zinc iminodisuccinate, and sodium polyaspartate.

[0024] Preferably, the solvent is at least one of glycerol, diethylene glycol, propylene glycol, butylene glycol, pentanediol, and hexylene glycol.

[0025] In a second aspect, the present invention provides a method for preparing the above-mentioned detergent synergist, comprising the following steps:

[0026] The nonionic surfactant, cationic polymer, green chelating agent and solvent are mixed evenly, heated to 45-75° C., mixed evenly for reaction, and then cooled to less than 45° C. to obtain the detergency synergist.

[0027] Preferably, the mixing reaction conditions are: stirring speed 100-500 rpm, stirring time 30-90 min.

[0028] In a third aspect, the present invention provides the use of the above-mentioned detergent synergist in daily chemicals.

[0029] Preferably, the content of the detergent synergist in the daily chemical product is 0.5-5% by mass.

[0030] The decontamination enhancer provided by the present invention can be compounded with different conventional daily chemical formulas (such as laundry detergent and multi-functional cleaning agent) at a relatively low addition amount to exert a significant decontamination enhancement effect, which can correspondingly reduce the amount of daily chemical detergents used and reduce the pollution of detergents in wastewater.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The detergent synergist provided by the present invention differs from conventional commercial detergent synergists (generally single cationic polymers) by deeply exploring the principles of detergent synergism and compounding specific substances in multiple dimensions to achieve synergistic effects at specific ratios, resulting in excellent detergency and detergent synergistic effects. It has excellent penetration-enhancing, chelating, and dispersing properties, and can work together with surfactants in detergents to exert detergency. Adding a small amount of the detergent synergist of the present invention to conventional daily chemicals can reduce detergent usage, thus having high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a graph comparing the detergency of Example 3 and a commercially available product added to a standard laundry detergent;

[0034] Figure 2 This is a graph comparing the detergency of Examples 1 and 4 and the comparative example added to standard laundry detergent;

[0035] Figure 3 This is a comparison chart of the detergency of Example 2 when used in laundry detergent and blank laundry detergent. DETAILED DESCRIPTION

[0036] To better illustrate the objectives, technical solutions, and advantages of the present invention, the present invention will be further described below with reference to specific examples. The experimental methods used in the following examples are conventional methods unless otherwise specified; the materials and reagents used are commercially available unless otherwise specified.

[0037] In the following examples and comparative examples, the preparation methods of the different cationic polyester polyether block copolymers are referred to patent CN 106380587A, and the specific corresponding structures are shown in Table 1 below.

[0038] Table 1 Structure of cationic polyester polyether block copolymers in Examples and Comparative Examples

[0039]

[0040] Example 1

[0041] An embodiment of the detergent synergist of the present invention is composed of the following components by mass percentage: 20% nonionic surfactant, 10% cationic polymer, 20% green chelating agent and the balance solvent.

[0042] The preparation method of the decontamination synergist described in this embodiment is:

[0043] (1) Weigh 20 g of isomeric tridecanol polyoxyethylene ether, 10 g of cationic polyester polyether block copolymer 1, 20 g of trisodium methylglycine diacetate, and 50 g of propylene glycol into a container;

[0044] (2) Raise the temperature to 50°C, stir at a stirring speed of 100 rpm for 30 minutes, cool to 40°C, and discharge the material to obtain the detergent synergist, referred to as "Example 1".

[0045] Example 2

[0046] An embodiment of the detergent synergist of the present invention is composed of the following components by mass percentage: 25% nonionic surfactant, 15% cationic polymer, 20% green chelating agent and the balance solvent.

[0047] The preparation method of the decontamination synergist described in this embodiment is:

[0048] (1) Weigh 25 g of isomeric decanol polyoxyethylene ether, 15 g of cationic polyester polyether block copolymer 2, 20 g of tetrasodium aspartate diacetate, and 40 g of butanediol into a container;

[0049] (2) Raise the temperature to 55°C, stir at a stirring speed of 200 rpm for 40 minutes, cool to 30°C, and discharge the material to obtain the detergent synergist, referred to as "Example 2".

[0050] Example 3

[0051] An embodiment of the detergent synergist of the present invention is composed of the following components by mass percentage: 30% nonionic surfactant, 15% cationic polymer, 35% green chelating agent and the balance solvent.

[0052] The preparation method of the decontamination synergist described in this embodiment is:

[0053] (1) Weigh 30 g of isomeric undecyl alcohol polyoxyethylene ether, 15 g of cationic polyester polyether block copolymer 3, 35 g of sodium polyaspartate, and 20 g of hexylene glycol into a container;

[0054] (2) Raise the temperature to 60°C, stir at a stirring speed of 300 rpm for 50 min, cool to 35°C, and discharge the material to obtain the detergent synergist, referred to as "Example 3".

[0055] Example 4

[0056] An embodiment of the detergent synergist of the present invention is composed of the following components by mass percentage: 5% nonionic surfactant, 20% cationic polymer, 5% green chelating agent and the balance solvent.

[0057] The preparation method of the decontamination synergist of Example 4 differs from that of Example 1 only in that:

[0058] In step (1), 5 g of isomeric tridecanol polyoxyethylene ether, 20 g of cationic polyester polyether block copolymer 1, 5 g of trisodium methylglycine diacetate, and 70 g of propylene glycol were weighed to prepare a detergent synergist referred to as "Example 4".

[0059] Comparative Example 1

[0060] The only difference between Comparative Example 1 and Example 1 is that an equal amount of water is used to replace the non-ionic surfactant isotridecyl polyoxyethylene ether to prepare a sample without a non-ionic surfactant, referred to as "Comparative Example 1 sample".

[0061] Comparative Example 2

[0062] The only difference between Comparative Example 2 and Example 1 is that an equal amount of water is used to replace the cationic polyester polyether block copolymer 1 to prepare a sample without a cationic polymer, referred to as "Comparative Example 2 sample".

[0063] Comparative Example 3

[0064] The only difference between Comparative Example 3 and Example 1 is that an equal amount of water is used to replace the green chelating agent trisodium methylglycine diacetate to prepare a sample without the green chelating agent, referred to as "Comparative Example 3 sample".

[0065] Comparative Example 4

[0066] The only difference between Comparative Example 4 and Example 1 is that an equal amount of water is used to replace the solvent propylene glycol to prepare a sample, referred to as "Comparative Example 4 sample".

[0067] Comparative Example 5

[0068] The only difference between Comparative Example 5 and Example 1 is that the dosage is adjusted: the amount of isotridecyl polyoxyethylene ether is reduced to 4 g, the amount of cationic polyester polyether block copolymer 1 is reduced to 0.1 g, and the amount of trisodium methylglycine diacetate is increased to 45.9 g. The prepared sample is referred to as "Comparative Example 5 sample".

[0069] Comparative Example 6

[0070] The only difference between Comparative Example 6 and Example 1 is that the dosage is adjusted: increasing the amount of isotridecyl polyoxyethylene ether to 32 g, increasing the amount of cationic polyester polyether block copolymer 1 to 22 g, reducing the amount of green chelating agent to 3 g, and adjusting the amount of propylene glycol to 43 g accordingly. The prepared sample is referred to as "Comparative Example 6 Sample".

[0071] Comparative Example 7

[0072] The only difference between Comparative Example 7 and Example 1 is that the nonionic surfactant isotridecanol polyoxyethylene ether is replaced by fatty alcohol polyoxyethylene ether (AEO7). The prepared sample is referred to as "Comparative Example 7 sample".

[0073] Comparative Example 8

[0074] The only difference between Comparative Example 8 and Example 1 is that the cationic polyester polyether block copolymer 1 is replaced by cationic polyacrylamide, and the obtained sample is referred to as "Comparative Example 8 sample" for short.

[0075] Effect Example 1

[0076] To explore the detergency of the detergency synergist provided by the present invention, detergency tests were performed on samples of Examples 1-4 and two commercially available detergent samples, wherein commercial product 1 is from Degussa, Germany, and commercial product 2 is from Croda, UK.

[0077] The detergency test method is as follows:

[0078] a. Purchase standard dirty cloths JB-01, JB-02, and JB-03, cut into 6cm*6cm pieces, 6 pieces of each type of dirty cloth, mark them, and measure the blank whiteness value;

[0079] b. Prepare hard water: Weigh 0.167g calcium chloride and 0.2037g magnesium chloride and dissolve them in 1L deionized water to obtain hard water;

[0080] c. Washing dirty cloths: Weigh 2g of sample, add 1L of hard water, and then add 3 pieces of each of the three types of dirty cloths whose whiteness values ​​have been measured in advance. Wash the cloths in a mixer at 200 rpm to simulate a real washing process for 20 minutes. (To improve the accuracy of the test results, conduct two parallel tests.)

[0081] d. One rinse: drain the wastewater after washing, add 1L of tap water, and rinse for 30 seconds;

[0082] e. Secondary rinse: drain the wastewater from the first rinse, add 1L of tap water, and rinse for 15 seconds;

[0083] f. Dehydration: Dehydration is carried out using a drum;

[0084] g. Drying: Dry the dirty cloth in an oven at 50°C for 20 minutes;

[0085] h. Measure the whiteness value.

[0086] i. Characterization of detergency: Calculate the difference in whiteness value of the dirty cloth before and after washing, and the difference in whiteness value of the dirty cloth washed with standard laundry detergent under the same conditions. The ratio of the two values ​​is the detergency.

[0087] The detergency test results are shown in Table 2: It can be seen that the detergency enhancer provided by the present invention has high detergency when used alone, and its decontamination effect on the three types of dirt is significantly better than that of commercially available detergency enhancer products. Its mechanism of action is different from that of commercially available detergents.

[0088] Table 2 Detergency comparison between the example samples themselves and commercially available products

[0089]

[0090] Effect Example 2

[0091] To further explore the difference in the detergency synergistic effect between the detergency synergist provided by the present invention and commercially available products, the detergency of the example sample and two commercially available products were tested in standard laundry detergent. The process is as follows:

[0092] (1) Prepare standard laundry detergent. The formula and preparation method are shown in Table 3:

[0093] Table 3 Standard laundry detergent formula and raw material specifications

[0094]

[0095]

[0096] (2) Samples were added to the standard laundry detergent prepared above, and the added concentration gradient was set to 0.5%, 1%, 2%, and 5% by mass concentration. The detergency test method was the same as that in Example 1.

[0097] The results of the detergency test are shown in Table 4, where the decontamination synergistic effect of Example 3 is compared with that of the commercially available product. Figure 1 As shown, the decontamination synergist provided by the present invention shows a gradually improved decontamination synergistic effect compared to the commercial product as the addition amount increases. At a 2% addition amount, the decontamination synergist exhibits significantly superior decontamination synergistic effects compared to the commercial product. However, the commercial product exhibits no further synergistic effect at 2% and 5% additions. This may be related to the mechanism of action of the decontamination synergist provided by the present invention.

[0098] The decontamination synergists provided in Examples 2 and 3 outperformed commercially available products at all concentrations, and the decontamination synergistic effect increased significantly with increasing concentration. The decontamination synergist in Example 3 had the best overall effect. The samples in Examples 1 and 4 showed no significant difference in decontamination synergistic effect compared to commercially available products at concentrations of 0.5-1%, but their decontamination synergistic effect was also superior to that of commercially available products at concentrations of 2-5%.

[0099] Table 4 Comparison of detergency of example samples and commercially available products added to standard laundry detergent

[0100]

[0101]

[0102] Effect Example 3

[0103] To further explore the synergistic effect of the components in the detergent synergist provided by the present invention, the following experiments were conducted on the samples of Examples 1, 4 and the comparative examples:

[0104] (1) Prepare the same standard laundry detergent as in Example 2;

[0105] (2) Samples were added to the standard laundry detergent prepared above, with the added concentration gradient set to 1% and 2% by mass. The detergency test method was the same as that in Example 1.

[0106] The results are shown in Table 5 and Figure 2 As shown, we can see that:

[0107] Only under the specific decontamination synergist components and ratios defined by the present invention in the embodiments can the decontamination synergistic effect of Example 1 be significantly improved. In Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4, the nonionic surfactant, cationic polymer, green chelating agent, and solvent all fail to achieve the decontamination synergistic effect of the combined action when one of them is missing, which is significantly worse than that of Examples 1 and 2. At the same time, in Comparative Example 5 and Comparative Example 6, when the ratio of each component is not suitable, the detergency is significantly deteriorated when added to the standard laundry detergent; in Comparative Example 7 and Comparative Example 8, other nonionic surfactants and cationic polymers outside the limited range are replaced respectively, and a good decontamination effect is also not achieved. The synergistic effect of each component in the decontamination synergist provided by the present invention is comprehensively demonstrated.

[0108] Table 5 Comparison of detergency of Examples 1 and 4 and Comparative Example added to standard laundry detergent

[0109]

[0110]

[0111] Application Example 1

[0112] The detergent synergist provided by the present invention can be applied to conventional laundry detergents available on the market. Taking the sample of Example 2 as an example, the formula of the detergent synergist added to conventional laundry detergent is shown in Table 6.

[0113] The same method as in the effect example was used to test the detergency of the blank laundry detergent without adding the sample of Example 2. The results are shown in Table 7 and Figure 3 .

[0114] It can be seen that adding a small amount of the detergency enhancer provided by the present invention to laundry detergent can significantly improve the detergency of the laundry detergent, and has high application value.

[0115] Table 6 Application of Example 2 in laundry detergent formula

[0116]

[0117]

[0118] Table 7 Detergency comparison of laundry detergent containing 1% of Example 2 and blank laundry detergent

[0119] Sample name Carbon Black JB-01 Protein JB-02 Sebum JB-03 Blank laundry detergent 1.0 1.2 1.1 Containing 1% Example 2 laundry detergent 1.2 1.5 1.4

[0120] Application Example 2

[0121] The decontamination synergist provided by the present invention can be applied to multifunctional cleaning agents. Taking Example 3 as an example, the application formula is shown in Table 8.

[0122] Multifunctional cleaning agent has a wide range of uses, especially for cleaning hard surfaces such as glass, tiles, wood boards, metal products, etc., and has a good cleaning effect.

[0123] Table 8 Application formula of Example 3 in multifunctional cleaning agent

[0124]

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A detergent synergist, characterized in that The invention comprises the following components, calculated by mass percentage: 5-30% nonionic surfactant, 1-20% cationic polymer, 5-45% green chelating agent and the balance solvent; the nonionic surfactant is isomeric alcohol polyoxyethylene ether, the cationic polymer is a cationic polyester polyether block copolymer, and the cationic polyester polyether block copolymer conforms to the following structure (I): （Ⅰ）； In the structure (I), R is CH3(CH2) 11 - and n+m=95, or R is CH3(CH2) 11 - and n+m=152, or R is CH3(CH2) 17 - and n+m=181; The green chelating agent is at least one of methylglycine diacetic acid, methylglycine diacetic acid trisodium, aspartic acid diacetic acid tetrasodium, glutamic acid diacetic acid tetrasodium, iminodisuccinate tetrasodium, iminodisuccinate iron, iminodisuccinate zinc, and sodium polyaspartate, and the solvent is an alcohol solvent.

2. The detergent synergist according to claim 1, wherein The invention comprises the following components in percentage by mass: 15-30% of a nonionic surfactant, 5-15% of a cationic polymer, 15-45% of a green chelating agent and the balance of a solvent.

3. The detergent synergist according to claim 1, wherein The invention comprises the following components in percentage by mass: 25-30% of a nonionic surfactant, 15% of a cationic polymer, 20-35% of a green chelating agent and the balance of a solvent.

4. The detergent synergist according to claim 1, wherein The nonionic surfactant is at least one of isomeric tridecanol polyoxyethylene ether, isomeric decanol polyoxyethylene ether, and isomeric undecanol polyoxyethylene ether.

5. The detergent synergist according to claim 1, wherein The solvent is at least one of glycerol, diethylene glycol, propylene glycol, butylene glycol, pentanediol, and hexylene glycol.

6. The method for preparing the detergent synergist according to any one of claims 1 to 5, characterized in that: The following steps are involved: The nonionic surfactant, cationic polymer, green chelating agent and solvent are mixed evenly, heated to 45-75° C., mixed evenly for reaction, and then cooled to less than 45° C. to obtain the detergency synergist.

7. Use of the detergent synergist according to any one of claims 1 to 5 in daily chemicals.

8. The use of the detergent synergist in daily chemicals as claimed in claim 7, characterized in that: In the daily chemicals, the content of the detergent synergist is 0.5-5% by mass.

Images