Structural detergent

Abstract

The invention provides a structural detergent, which is prepared from the following ingredients in percentage by mass: 4 to 8 percent of fatty acid salt, 7 to 20 percent of alkylbenzene sulfonate, 3 to 10 percent of isomeric alcohol polyoxyethylene ether, 0 to 8 percent of other surfactants, 9 to 18 percent of electrolyte, 3 to 8 percent of chelating agents, 1 to 3 percent of dispersing agents and 0.01 to 3 percent of other ingredients. And the balance of deionized water. According to the structural detergent, the surfactant and the washing assistants (electrolyte, chelating agent and dispersing agent) are reasonably compounded, so that the structural detergent forms a compact micelle structure, generates yield stress and forms a suspension effect, thereby obtaining better high-temperature and low-temperature stability; and meanwhile, the structural detergent has good tolerance to hard water, and can effectively slow down the phenomena of yellowing, greying, hardening and the like of the fabric after being washed by the hard water for a long time. No solubilizer in any form is added into the detergent, so that the use cost can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of detergents, and in particular to a structured detergent. Background Art

[0002] Most of the detergents currently available on the market cannot maintain a stable washing effect under hard water conditions. Hard water contains calcium and magnesium ions, and the presence of calcium and magnesium ions will have a significant negative impact on washing, such as affecting the appearance of the fabric after washing, and the fabric becoming gray and hard.

[0003] It is very necessary to improve the detergent's ability to resist hard water and reduce the negative effects of calcium and magnesium ions on washing. Summary of the invention

[0004] Based on this, the present application provides a structured detergent with excellent hard water resistance and capable of reducing the negative effects of calcium and magnesium ions.

[0005] The present application provides a structured detergent, which comprises the following components by mass percentage:

[0006] Fatty acid salt 4-8%;

[0007] Alkylbenzene sulfonate 7-20%;

[0008] Isomeric alcohol polyoxyethylene ether 3-10%;

[0009] Other surfactants 0-8%;

[0010] Electrolytes 9-18%;

[0011] Chelating agent 3-8%;

[0012] Dispersant 1-3%;

[0013] Other components 0.01-3%;

[0014] The balance is deionized water.

[0015] In some embodiments, the fatty acid salt is a mixture of one or more C8-C18 fatty acid salts.

[0016] In some embodiments, the isomeric alcohol polyoxyethylene ether is a mixture of one or more C8-C16 isomeric fatty alcohol polyoxyethylene ethers (EO≤9).

[0017] In some embodiments, the isomeric alcohol polyoxyethylene ether is a mixture of one or more C9-C15 isomeric fatty alcohol polyoxyethylene ethers (EO≤8).

[0018] In some embodiments, the alkylbenzene sulfonate is a mixture of one or more of sodium dodecylbenzene sulfonate and potassium dodecylbenzene sulfonate.

[0019] In some embodiments, the other surfactant is a mixture of one or more of fatty alcohol polyoxyethylene ether sulfates, fatty acid methyl ester polyoxyethylene ether sulfonates, fatty alcohol polyoxyethylene ether carboxylates, linear fatty alcohol polyoxyethylene ethers and fatty amine polyoxyethylene ethers.

[0020] In some embodiments, the electrolyte is a mixture of one or more of silicates, carbonates, bicarbonates, chlorides, sulfates, gluconates, and citrates.

[0021] In some embodiments, the chelating agent is a mixture of one or more of ethylenediaminetetraacetate, methylglycine diacetate, and glutamate diacetate.

[0022] In some embodiments, the dispersant is a mixture of one or more of a modified polyethyleneimine and a hydrophobically modified polyacrylic acid copolymer.

[0023] In some embodiments, the other components are a mixture of one or more of flavors, pigments, preservatives, fluorescent whitening agents and defoaming agents.

[0024] The structured detergent provided above has at least the following beneficial effects:

[0025] (1) This structured detergent solves the stability problems of high surfactants and high detergent additives. It uses a variety of surfactants, electrolytes, chelating agents, and dispersants to form a dense micelle structure, generate yield stress, and form a suspension effect, with good high and low temperature stability. In addition, compared with common high-additive transparent detergents, this structured detergent does not add any form of solubilizer, which significantly reduces product costs.

[0026] (2) The structured detergent contains a large amount of electrolytes and chelating agents, which can effectively neutralize calcium and magnesium ions in hard water, improve the detergency performance, and effectively slow down the yellowing, graying, and hardening of fabrics caused by long-term hard water washing, thus solving the problem that commercially available detergents cannot maintain a stable washing effect under hard water conditions.

[0027] (3) The sum of the mass fractions of electrolytes and chelating agents in the structured detergent is ≥ 12%, which can efficiently remove calcium and magnesium ions in hard water and effectively reduce the yellowing, graying, and hardening of hotel linens caused by hard water washing. DETAILED DESCRIPTION

[0028] For ease of understanding of the present invention, the application will be described more fully below with reference to relevant embodiments. The following provides preferred embodiments of the application. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] The terms "and / or", "or / and", and "and / or" used herein include any one of two or more related listed items, and also include any and all combinations of the related listed items, wherein the any and all combinations include any combination of two related listed items, any more related listed items, or all related listed items. It should be noted that when at least three items are connected by at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in the present application, the technical solution undoubtedly includes technical solutions connected by "logical and", and also undoubtedly includes technical solutions connected by "logical or".

[0031] In the present application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0032] In this application, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0033] Only some numerical ranges are specifically disclosed herein. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, and likewise any upper limit can be combined with any other upper limit to form an unspecified range. In addition, each separately disclosed point or single value can itself be combined as a lower limit or upper limit with any other point or single value or with other lower limits or upper limits to form an unspecified range.

[0034] The temperature parameters in this application, unless otherwise specified, allow both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument. Fluctuations within the range of ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are allowed.

[0035] Herein, the “suitable” mentioned in “suitable combination”, “suitable method”, “any suitable method”, etc., shall be based on the ability to implement the technical solution of this application, solve the technical problems of this application, and achieve the expected technical effects of this application.

[0036] In the present application, "further", "further", "particularly" and the like are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of the present application.

[0037] In this application, "optionally", "optional", and "optional" mean optional or dispensable, that is, any one of the two parallel schemes of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0038] In the description of the application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] Unless otherwise specified, all formulations and tests herein took place at 25°C.

[0040] As used herein, "includes," "comprising," "containing," "having," or other variations thereof are intended to encompass non-closed inclusions, and no distinction is made between these terms. The term "comprising" means that other steps and ingredients that do not affect the end result may be added. The compositions and methods / processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein. As used herein, no distinction is made between the terms "efficacy," "performance," "effect," and "efficacy."

[0041] If there is no special description, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. If there is no special description, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0042] If there is no special explanation, all the steps of the present application can be performed sequentially or randomly, preferably sequentially.

[0043] Most of the detergents currently available on the market cannot maintain a stable washing effect under hard water conditions. Hard water contains calcium and magnesium ions, and the presence of calcium and magnesium ions will have a significant negative impact on washing. First, calcium and magnesium ions combined with anionic surfactants will produce insoluble and sticky substances, which not only significantly reduce the decontamination ability, but also deposit and adhere to the surface of fabric fibers, thereby affecting the appearance of the fabric after washing. Secondly, calcium and magnesium ions will combine with carbonate, hydroxide, etc. in the cleaning solution during the washing process to form insoluble fine crystals, resulting in a decrease in the alkalinity of the washing solution. At the same time, insoluble fine crystals will also be deposited on the surface or inside of the fabric fibers. A large amount of calcium carbonate deposition is considered to be one of the main reasons for the graying and hardening of fabrics.

[0044] Generally speaking, detergents can be added with anti-hard water detergent additives to improve the detergent's ability to resist hard water. These detergent additives include carbonates, silicates, 4A zeolite, and small molecular weight polycarboxylates (chelating agents), such as ethylenediaminetetraacetate, glutamic acid oxalate, methylglycine diacetate, citrate, gluconate, etc. Ethylenediaminetetraacetate, glutamic acid oxalate, and methylglycine diacetate have strong chelating abilities and are considered to be effective substitutes for tripolyphosphate.

[0045] However, high levels of chelating agents in detergents require a large amount of solubilizing agents (such as sodium cumene sulfonate, sodium p-toluene sulfonate, ethanol, isopropanol, water-soluble alcohol ether solvents, etc.) and have poor low-temperature stability. It is generally believed that solubilizing agents have no positive effect on washing, and adding a large amount will only lead to a sharp increase in costs, which is a waste of resources for both producers and consumers. Structured detergents help stabilize chelating agents and other additives and reduce the use of solubilizing agents. There are already structured detergents on the market that contain a large amount of detergent additives and chelating agents. The surfactants of this type of detergent are mainly fatty acid alkali metal salts (accounting for more than 60% of the surfactant content). However, fatty acid alkali metal salts themselves have poor hard water resistance, which limits the use of this type of structured detergent.

[0046] Based on the above problems, the present application forms a dense micellar structure, generates yield stress, and forms a suspension effect through the reasonable compounding of surfactants and detergent aids (electrolytes, chelating agents, dispersants), thereby obtaining better high and low temperature stability; at the same time, the structured detergent has good tolerance to hard water, and can effectively slow down the yellowing, graying, and hardening of fabrics caused by long-term hard water washing. The detergent does not add any form of solubilizer, which can effectively reduce the cost of use.

[0047] One or more embodiments of the present application provide a structured detergent, which includes the following components, measured by mass percentage: 4-8% fatty acid salt, 7-20% alkylbenzene sulfonate, 3-10% isomeric alcohol polyoxyethylene ether, 0-8% other surfactants, 9-18% electrolyte, 3-8% chelating agent, 1-3% dispersant, and 0.01-3% other components; the balance is deionized water.

[0048] It should be noted that the "structured detergent" mentioned above is a liquid detergent with a special liquid crystal structure. The core of the detergent is the rational combination of surfactants and additives to form a liquid crystal structure capable of suspending solid particles. The use of additives enables it to have a more excellent washing ability.

[0049] As a non-limiting example, the mass proportion of the fatty acid salt in the structured detergent can be but is not limited to 4%, 5%, 6%, 7%, 8% or a range between any two of the above values.

[0050] The mass percentage of alkylbenzene sulfonate in the structured detergent may be, but is not limited to, 7%, 9%, 10%, 12%, 14%, 16%, 18%, 20% or a range between any two of the above mass percentages.

[0051] The mass proportion of isomeric alcohol polyoxyethylene ether in the structured detergent can be but not limited to 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or the range between any two of the above values.

[0052] The mass proportion of other surfactants in the structured detergent can be but is not limited to 0, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8% or a range between any two of the above values.

[0053] The mass proportion of electrolyte in the structured detergent can be but is not limited to 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18% or a range between any two of the above values.

[0054] The mass proportion of the chelating agent in the structured detergent may be, but is not limited to, 3%, 4%, 5%, 6%, 7%, 8% or a range between any two of the above values.

[0055] The mass proportion of the dispersant in the structured detergent may be, but is not limited to, 1%, 2%, 3% or a range between any two of the above values.

[0056] The mass proportion of other components in the structured detergent can be but is not limited to 0.01%, 0.05%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3% or the range between any two of the above values.

[0057] When the mass proportions of the various components in the structured detergent are respectively within the above ranges, it is conducive to the formation of a stable liquid crystal structure.

[0058] It is understandable that the structured detergent provided in the present application has at least the following beneficial effects:

[0059] (1) This structured detergent solves the stability problems of high surfactants and high detergent additives. It uses a variety of surfactants, electrolytes, chelating agents, and dispersants to form a dense micelle structure, generate yield stress, and form a suspension effect, with good high and low temperature stability. In addition, compared with common high-additive transparent detergents, this structured detergent does not add any form of solubilizer, which significantly reduces product costs.

[0060] (2) The structured detergent contains a large amount of electrolytes and chelating agents, which can effectively neutralize calcium and magnesium ions in hard water, improve the detergency performance, and effectively slow down the yellowing, graying, and hardening of fabrics caused by long-term hard water washing, thus solving the problem that commercially available detergents cannot maintain a stable washing effect under hard water conditions.

[0061] (3) The sum of the mass fractions of electrolytes and chelating agents in the structured detergent is ≥ 12%, which can efficiently remove calcium and magnesium ions in hard water and effectively reduce the yellowing, graying, and hardening of hotel linens caused by hard water washing.

[0062] It should be noted that the structured detergent of the present application is particularly suitable for hotel linen washing. Hotel linens are generally washed uniformly by central water washing and cleaning factories. According to international practice, the washing water of central water washing and cleaning factories needs to be softened and the water hardness is less than 40ppm. In actual operation, many central water washing and cleaning factories have high water hardness or obvious fluctuations in water hardness due to problems such as water sources, plant planning, equipment, and personnel. In order to ensure cleanliness, hotel linens need to adopt a high temperature and high alkaline washing environment. Under this washing environment, hard water washing can cause yellowing, graying, and hardening of linens in a short period of time. Long-term hard water washing will also increase the loss of linens and increase hotel operating costs. The weight of electrolytes and chelating agents in the structured main washing liquid is ≥12%, which can efficiently remove calcium and magnesium ions in hard water, and effectively slow down the yellowing, graying, and hardening of hotel linens produced in hard water washing.

[0063] The liquid detergent used for hotel linen washing is added through a dispenser. Due to the particularity of the dispenser program setting, it is necessary to add enough detergent in a short time. For conventional detergents, in order to maintain the low viscosity of the system and the stability of high-low temperature viscosity, a large amount of solubilizers are added to the system, which is undoubtedly a huge waste of resources. The unique shear thinning properties of structured detergents enable the product to maintain flow stability even under low temperature conditions, reducing the number of after-sales service. During the experiment, it was found that when the ratio of anions to nonions is within a certain range (for example, 2.5:1-3.5:1), not only can the structured detergent have a lower viscosity at room temperature, but also the viscosity difference between high temperature (45°C) and low temperature (0°C) can be within 200cp, and the difference in pump flow per second is within 2ml, which has a good application prospect.

[0064] In some embodiments, the fatty acid salt is a mixture of one or more C8-C18 fatty acid salts.

[0065] In some optional embodiments, the fatty acid salt is a mixture of coconut oil fatty acid salt and oleate; further optionally, it can be a mixture of coconut oil fatty acid potassium and potassium oleate.

[0066] In some embodiments, the fatty acid salt is a mixture of coconut oil fatty acid potassium and potassium oleate, and the mass proportion of coconut oil fatty acid potassium in the fatty acid salt is greater than or equal to 40% and less than 100%.

[0067] As a possible embodiment, the alkylbenzene sulfonate is a mixture of one or more of sodium dodecylbenzene sulfonate and potassium dodecylbenzene sulfonate. In some optional embodiments, the alkylbenzene sulfonate is sodium dodecylbenzene sulfonate.

[0068] In some embodiments, the isomeric alcohol polyoxyethylene ether is a mixture of one or more C8-C16 isomeric fatty alcohol polyoxyethylene ethers (EO≤9). This is beneficial for the structured detergent to have better stability and is not easy to delaminate in high and low temperature environments.

[0069] In some optional embodiments, the isomeric alcohol polyoxyethylene ether is a mixture of one or more C9-C15 isomeric fatty alcohol polyoxyethylene ethers (EO≤8).

[0070] In some exemplary embodiments, the isomeric alcohol polyoxyethylene ether includes a mixture of one or more of C12-C15 isomeric alcohol polyoxyethylene ether (EO=7 or 8), C13 isomeric alcohol polyoxyethylene ether (EO=7 or 8), C12-C13 isomeric alcohol polyoxyethylene ether (EO=7 or 8), C11 isomeric alcohol polyoxyethylene ether (EO=6) and C9-C11 isomeric alcohol polyoxyethylene ether (EO=5 or 6). Optionally, the isomeric alcohol polyoxyethylene ether is C9-C11 isomeric alcohol polyoxyethylene ether (EO=6).

[0071] In some embodiments, the other surfactant is a mixture of one or more of fatty alcohol polyoxyethylene ether sulfates, fatty acid methyl ester polyoxyethylene ether sulfonates, fatty alcohol polyoxyethylene ether carboxylates, linear fatty alcohol polyoxyethylene ethers and fatty amine polyoxyethylene ethers.

[0072] As a possible implementation, the fatty amine polyoxyethylene ether includes one or more of a polymer of dodecylamine and 10 ethylene oxides, a polymer of dodecylamine and 15 ethylene oxides, and a polymer of octadecylamine and 15 ethylene oxides.

[0073] In some optional embodiments, the other surfactant is a mixture of fatty alcohol polyoxyethylene ether sulfate and fatty amine polyoxyethylene ether. Alternatively, the other surfactant is a mixture of C12-C14 alcohol polyoxyethylene ether (EO=2-3) sodium sulfate and C12 amine polyoxyethylene ether (EO=10).

[0074] As a possible implementation, the electrolyte is a mixture of one or more of silicate, carbonate, bicarbonate, chloride, sulfate, gluconate and citrate.

[0075] In some optional embodiments, the electrolyte is a mixture of silicate and citrate. Alternatively, the electrolyte is a mixture of sodium metasilicate pentahydrate and sodium citrate.

[0076] As a possible implementation, the chelating agent is a mixture of one or more of ethylenediaminetetraacetate, methylglycine diacetate and glutamic acid diacetate.

[0077] In some optional embodiments, the chelating agent is a mixture of one or more of ethylenediaminetetraacetic acid disodium (EDTA-2Na), ethylenediaminetetraacetic acid tetrasodium (EDTA-4Na), methylglycine diacetate including methylglycine diacetate trisodium (MGDA - 3Na) and glutamate diacetate including glutamate diacetate tetrasodium (GLDA - 4Na). Optionally, the chelating agent is ethylenediaminetetraacetic acid tetrasodium (EDTA-4Na).

[0078] In some optional embodiments, the dispersant is a mixture of one or more of modified polyethyleneimine and hydrophobically modified polyacrylic acid copolymer.

[0079] In some optional embodiments, the dispersant is a mixture of one or more of HP-20 (BASF), PIS-20B (Liaoning Kelong), Narlex PPE1189 (Nouryon) and Alcosperse 747 (Nouryon). Optionally, the dispersant is Narlex PPE1189 (Nouryon).

[0080] In some embodiments, the other components are a mixture of one or more of flavors, pigments, preservatives, fluorescent whitening agents, and defoaming agents.

[0081] The technical scheme of the present invention is described in detail below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods for which specific conditions are not specified in the following embodiments are preferably referred to the guidance given in the present invention, and can also be carried out according to the experimental manual or conventional conditions in the art, or according to the conditions recommended by the manufacturer, or with reference to experimental methods known in the art.

[0082] In the following specific embodiments, the measured parameters of raw material components may have slight deviations within the range of weighing accuracy unless otherwise specified. For temperature and time parameters, acceptable deviations caused by instrument test accuracy or operation accuracy are allowed.

[0083] It should be noted that the raw materials used in the above embodiments and comparative examples can be purchased from the market.

[0084] 1. Preparation of structured detergent

[0085] 1. Prescription composition

[0086] The formulation compositions of Examples 1-6 and Comparative Examples 1-2 are shown in Table 1.

[0087] Table 1

[0088]

[0089] Among them, the other components in the above examples and comparative examples respectively include 0.25% fluorescent whitening agent CBS-X, 0.002% pigment, 0.2% flavor, and 0.1% silicone defoamer. "EDTA-4Na" refers to tetrasodium ethylenediaminetetraacetic acid. "NarlexPPE1189" is a hydrophobically modified polyacrylic acid copolymer produced by Nouryon.

[0090] 2. Preparation process

[0091] Step S1, add the water in the formula amount into the stirring kettle, start stirring, start heating, and control the speed of the stirring paddle within 45 rpm.

[0092] Step S2: Add sodium fatty alcohol polyoxyethylene ether sulfate and stir until completely dissolved.

[0093] Step S3: Add fluorescent whitening agent CBS-X and stir until completely dissolved.

[0094] Step S4: After the temperature of the liquid in the stirred tank rises to 60° C., add potassium coconut oleate, potassium oleate and sodium dodecylbenzene sulfonate and stir until they are completely dissolved.

[0095] Step S5, add dodecylamine polyoxyethylene ether and isomeric C9-11 alcohol polyoxyethylene ether and stir until they are completely dissolved without obvious particles, and continue stirring for 20 minutes.

[0096] Step S6: Add sodium citrate and stir for 5 minutes until it is completely dissolved.

[0097] Step S7, slowly add sodium metasilicate pentahydrate and EDTA-4Na, stir, increase the speed of the stirring paddle and control it within 90 rpm, and stir for 15 minutes.

[0098] Step S8, slowly add Narlex PPE1189, at this time, reduce the speed of the stirring blade and control it within 45 rpm, and stir for 15 minutes.

[0099] Step S9, adding essence, pigment and defoaming agent into the system, and continuing stirring for 30 minutes to obtain.

[0100] 2. Performance Test

[0101] Test Example 1: Yield stress test

[0102] The yield stress of a fluid refers to the shear stress at which some non-Newtonian fluids begin to flow when subjected to a certain shear stress. For some non-Newtonian fluids, when a small shear stress is applied, the fluid only deforms without flowing; when the shear stress increases to a certain value, the fluid begins to flow, and this shear stress value is the yield stress of the fluid. Compared with ordinary detergents, structured detergents have a yield stress of 0.5Pa-2Pa within a certain temperature range, which allows the detergent aid to be dispersed in the system without stratification.

[0103] The test results of the above embodiments and comparative examples are shown in Table 2.

[0104] Table 2

[0105]

[0106] From the results in Table 2, it can be seen that the detergent of the present application has a relatively high yield stress, which is consistent with the characteristics of a structured detergent.

[0107] Test Example 2: High-low temperature stability

[0108] Low temperature stability test method: Place the sample in a refrigerator at 0°C for 30 days and return to room temperature to observe the product appearance.

[0109] Room temperature stability test method: Place the sample in a room temperature environment for 180 days and observe the product appearance.

[0110] High temperature stability test method: Place the sample in an oven at 45°C for 30 days and return to room temperature to observe the product appearance.

[0111] The test results of the above embodiments and comparative examples are shown in Table 3.

[0112] Table 3

[0113]

[0114] From the results in Table 3, it can be seen that the structured detergent of the present application has good stability when stored at low temperature, room temperature and high temperature, and no obvious stratification phenomenon occurs.

[0115] Test Example 3: Viscosity at different temperatures

[0116] Structured detergents have typical shear-thinning properties, and the viscosity is tested using a rotational viscometer. When comparing the viscosity values ​​between the test groups, the rotational viscometer speed needs to be the same. In the test, the rotational viscometer speed is fixed at 30r / min, and different rotors are selected according to the viscosity. The torque of the rotational viscometer is between 20-85%.

[0117] The viscosity of Comparative Examples 1-2 and Examples 1-6 at low temperature (0°C), room temperature (25±1°C), and high temperature (45°C) was tested according to the above method.

[0118] The test results of the above embodiments and comparative examples are shown in Table 4.

[0119] Table 4

[0120]

[0121] From the results in Table 4, it can be seen that the viscosity of the detergent in each embodiment decreases with the increase of temperature and increases with the decrease of temperature. After analysis, it can be seen that the viscosity of the detergent in each embodiment has a complex relationship with the surfactant content, electrolyte content, and chelating agent content; when the surfactant content is constant, the higher the electrolyte + chelating agent content, the greater the viscosity; when the electrolyte + chelating agent content is constant, the higher the surfactant content, the higher the viscosity, and the smaller the high-low temperature viscosity fluctuation; when the surfactant content and the electrolyte + chelating agent content are constant, the higher the proportion of the chelating agent (EDTA-4Na), the smaller the viscosity, and the greater the high-low temperature viscosity fluctuation.

[0122] In Comparative Examples 1-2, the viscosity decreases slightly with increasing temperature, which is because the viscosity of the comparative examples at room temperature is already very low; the viscosity of the comparative examples increases significantly with decreasing temperature, which is related to the change in the colloidal morphology of the comparative examples; the higher the surfactant content of the comparative examples, the higher the viscosity.

[0123] Test Example 4: Flow rate at different temperatures

[0124] The structured detergent of the present application is particularly suitable for hotel linen washing. The flow rates of Comparative Examples 1-2 and Examples 1-6 at low temperature, room temperature (25±1° C.), and high temperature were calibrated using a SEKO 51K60GN-CFPT diaphragm metering pump.

[0125] The results of the above embodiments and comparative examples are shown in Table 5.

[0126] Table 5

[0127]

[0128] As can be seen from the results in Table 5, the flow rates of the comparative examples drop sharply as the temperature drops. In actual tests, the drop is particularly obvious when the temperature is less than 15°C. The flow rates of the embodiments also drop as the temperature drops, but the drop range is very different from that in the comparative examples, which may be related to the stability of the high-temperature-low-temperature viscosity of the detergent. Although the viscosity of Example 5 is still higher than that of the comparative example, the shear-thinning characteristics of the structured detergent result in the flow rate being able to meet the use requirements.

[0129] Test Example 5: Hard Water Resistance Test

[0130] The high temperature, high alkali, and high mechanical force washing environment is difficult to simulate in the laboratory. According to Test Examples 2-4, the detergents of Comparative Example 2 and Example 5 were selected for testing in a central water washing factory.

[0131] Test method: (1) Randomly select three towels and three pillowcases, take eight points on the front and back, and test the whiteness using a whiteness meter.

[0132] (2) Cut the towels and pillowcases in half in the middle, divide them into two groups, and mark them.

[0133] (3) Washing was performed using a 100 kg industrial washing machine. Except for Comparative Example 2 and Example 5, the washing process required the use of emulsifiers, alkaline additives, softeners, and neutralizing acid agents required for normal washing. Washing conditions: a) main wash temperature 75°C; b) main wash time 12 min; c) water hardness 110-130 ppm.

[0134] (4) After washing, the clothes need to be dried or ironed before entering the next round of washing, for a total of 20 washes.

[0135] (5) Test the whiteness values ​​of the two groups.

[0136] The test results are shown in Table 6.

[0137] Table 6

[0138]

[0139] It can be seen from the results in Table 6 that, under the same washing conditions, after 20 rounds of washing, both Comparative Example 2 and Example 5 can increase the whiteness of the linens. This is because the linens used for the test were not washed twice before use, and repeated washing will cause the linens to become whiter and whiter. In comparison, the whiteness increase of Comparative Example 2 is not as high as that of Example 5, because Example 5 contains a large amount of sodium metasilicate pentahydrate and EDTA-4Na. Sodium metasilicate pentahydrate and EDTA-4Na can not only reduce the calcium and magnesium ion content in the washing solution, reduce the deposition of calcium soap or dissolve the existing calcium soap, but also directly improve the ability of the detergent to remove dirt.

[0140] In summary, the structured detergent of the present application has excellent high-low temperature stability, viscosity stability and hard water resistance through the interaction of different components.

[0141] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0142] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A structured detergent, characterized in that: In terms of mass percentage, it includes the following components: Fatty acid salt 4-8%; Alkylbenzene sulfonate 7-20%; Isomeric alcohol polyoxyethylene ether 3-10%; Other surfactants 0-8%; Electrolytes 9-18%; Chelating agent 3-8%; Dispersant 1-3%; Other components 0.01-3%; The balance is deionized water.

2. The structured detergent according to claim 1, characterized in that The fatty acid salt is a mixture of one or more C8-C18 fatty acid salts.

3. The structured detergent according to claim 1, characterized in that The isomeric alcohol polyoxyethylene ether is a mixture of one or more C8-C16 isomeric fatty alcohol polyoxyethylene ethers (EO≤9).

4. The structured detergent according to claim 3, characterized in that The isomeric alcohol polyoxyethylene ether is a mixture of one or more C9-C15 isomeric fatty alcohol polyoxyethylene ethers (EO≤8).

5. The structured detergent according to claim 1, characterized in that The alkylbenzene sulfonate is a mixture of one or more of sodium dodecylbenzene sulfonate and potassium dodecylbenzene sulfonate.

6. The structured detergent according to claim 1, characterized in that The other surfactant is a mixture of one or more of fatty alcohol polyoxyethylene ether sulfates, fatty acid methyl ester polyoxyethylene ether sulfonates, fatty alcohol polyoxyethylene ether carboxylates, linear fatty alcohol polyoxyethylene ethers and fatty amine polyoxyethylene ethers.

7. The structured detergent according to claim 1, characterized in that The electrolyte is a mixture of one or more of silicate, carbonate, bicarbonate, chloride, sulfate, gluconate and citrate.

8. The structured detergent according to claim 1, characterized in that The chelating agent is a mixture of one or more of ethylenediaminetetraacetate, methylglycine diacetate and glutamic acid diacetate.

9. The structured detergent according to claim 1, characterized in that The dispersant is a mixture of one or more of modified polyethyleneimine and hydrophobically modified polyacrylic acid copolymer.

10. The structured detergent according to any one of claims 1 to 9, characterized in that The other components are a mixture of one or more of flavors, pigments, preservatives, fluorescent whitening agents and defoaming agents.

Images