Long-lasting soil release liquid detergent compositions containing a fiber grade, directional release agent

Abstract

The application discloses a long-acting decontamination liquid washing composition containing a fiber-grade directional release agent, which comprises the following components in percentage by weight: sodium dodecyl benzene sulfonate 5-13%, sodium fatty alcohol polyoxyethylene ether sulfate 3-8%, fatty alcohol polyoxyethylene ether 10-18%, humectant 2-5%, alkyl glucoside 1-5%, sodium hydroxide 1-6%, chelating agent 0.1-0.5%, fiber-grade directional release agent 0.1-3%, enzyme preparation 0.1-0.5%, essence 0.1-0.5%, preservative 0.1-0.5%, pH regulator 0.05-1%, bacteriostatic agent 0.01-0.5%, sodium chloride 0-2% and deionized water in the rest amount. The composition has the following beneficial effects: a directional release agent is used as a core component of the liquid composition to play a 'directional release' function at the fiber / dirt interface; on the one hand, high cationic charge makes dirt stably suspended in the washing liquid through electrostatic repulsion; on the other hand, a polymer thin layer deposited on the surface of the fiber can reduce the interfacial adhesion between oil stains and the fiber, so that stubborn dirt is more easily released and falls off, and the anti-pollution effect is continuously played after multiple washing.

Description

Technical Field

[0001] This invention relates to the field of detergents, and more particularly to a long-lasting liquid detergent composition containing a fiber-grade directional stripping agent. Background Technology

[0002] As clothing that comes into direct contact with the skin, the cleanliness of underwear directly affects the wearer's health and comfort. With consumers increasingly demanding higher standards for underwear washing hygiene, underwear wash formulas need to achieve deep cleaning under gentle conditions while preventing stains removed during washing from redepositing within the fibers, and avoiding the fabric from becoming gray, stiff, and developing residual odors after repeated wear.

[0003] Currently available commercially available lingerie laundry detergents generally suffer from insufficient stain removal and inadequate long-term fabric protection. During washing, stains detached from the fabric are easily redeposited if they cannot be effectively suspended in the detergent solution, leading to graying, dulling, and rough textures after multiple washes. Existing laundry detergent formulas commonly use anti-redeposition agents to improve the detergent's long-term stain removal capabilities. These anti-redeposition agents are mainly petroleum-based polymers, playing a key role in improving the overall performance of the detergent through functions such as chelating calcium and magnesium ions, dispersing suspended dirt, and inhibiting inorganic salt crystallization. However, they have significant drawbacks: firstly, they lack selective deposition ability on fibers, failing to inhibit dirt accumulation during multiple washing cycles; secondly, they are difficult to biodegrade in the natural environment, easily causing pollution.

[0004] Existing research indicates that cationic modified cellulose, cationic starch, and cationic pullulan can all be used as fabric care additives. Among these, starch graft copolymers have demonstrated anti-redeposition properties comparable to petroleum-based polymers in automatic dishwashers and fabric detergents, while also exhibiting better biodegradability. However, under the low-temperature, low-volume conditions required for lingerie washing, their anti-redeposition effect still cannot match that of petroleum-based polymers. Therefore, existing lingerie washing detergents still face the challenge of achieving both long-lasting stain removal and green sustainability, and the continued accumulation of dirt, graying, and hardening after washing cycles. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a long-lasting stain-removing liquid detergent composition containing a fiber-grade directional stripping agent. By employing a cationic xylan copolymer as a fiber-grade directional stripping agent, the long-lasting stain-removing effect of the laundry detergent is achieved.

[0006] The technical solution adopted in this invention is as follows:

[0007] This invention provides a long-lasting detergent liquid composition containing a fiber-grade directional stripping agent. The long-lasting detergent liquid composition includes: 5-13% sodium dodecylbenzenesulfonate, 3-8% sodium fatty alcohol polyoxyethylene ether sulfate, 10-18% fatty alcohol polyoxyethylene ether, 2-5% humectant, 1-5% alkyl glucoside, 1-6% sodium hydroxide, 0.1-0.5% chelating agent, 0.1-3% fiber-grade directional stripping agent, 0.1-0.5% enzyme preparation, 0.1-0.5% fragrance, 0.1-0.5% preservative, 0.05-1% pH adjuster, 0.01-0.5% antibacterial agent, 0-2% sodium chloride, and the remainder being deionized water.

[0008] In the liquid detergent composition, sodium hydroxide neutralizes sodium dodecylbenzenesulfonate in the system. Sodium dodecylbenzenesulfonate and sodium fatty alcohol polyoxyethylene ether sulfate, as the main components of anionic surfactants, work synergistically to form mixed micelles, reducing the critical micelle concentration, providing moderate and long-lasting foam, and significantly improving detergency. The addition of fatty alcohol polyoxyethylene ether enhances the system's detergency against sebum-based stains, while alkyl glucoside, as a green nonionic surfactant, not only improves detergency but also enhances the system's low-temperature stability and foaming stability, while reducing the system's irritation. The chelating agent primarily complexes iron, magnesium, and calcium ions in the water, preventing metal ions from being trapped. Negative effects of ions on the system; pH adjusters maintain the system at a suitable pH environment (approximately pH range 6-8) to match the optimal pH range for enzyme preparation and washing; humectants primarily provide gentle hand care; enzyme preparations provide surfactants with targeted catalytic decomposition function, specifically breaking down stains; sodium chloride acts as a thickener; preservatives inhibit microbial growth in the liquid detergent composition, preventing spoilage; antibacterial agents impart additional bactericidal and antimicrobial functions to the composition; fragrances provide a pleasant aroma to the system; fiber-grade targeted stripping agents perform "targeted stripping" at the fiber / dirt interface, enabling the system to achieve long-lasting cleaning effects.

[0009] The fiber-grade directional stripping agent shown is a cationic xylan grafted polymer with good water solubility. Its structure includes a xylan backbone and cationic side chains grafted onto it.

[0010] The cationic side chain of the fiber-grade directional stripping agent comprises repeating units of any cationic monomer represented by general formula (I):

[0011] CH2=CR1-COR2-(CH2)2-N + (CH3)3X - (I)

[0012] Where R1 is H or CH3, R2 is O or NH, and X -For Cl - or CH30SO3 - .

[0013] The number-average molecular weight (Mn) of the xylan backbone of the fiber-grade directional stripping agent is 5000-20000 Da, the weight-average molecular weight (Mw) is 8000-40000 Da, the degree of substitution is 0.5-2, and the total mass of the cationic side chains grafted thereon accounts for 80-200% of the mass percentage of the xylan backbone.

[0014] The fiber-grade directional stripping agent shown has a number-average molecular weight (Mn) of 10,000-150,000 Da, a weight-average molecular weight (Mw) of 30,000-400,000 Da, a polydispersity (Mw / Mn) of 1.5-3.0, and a charge density of 0.5-5 meq / g.

[0015] The humectant includes, but is not limited to, glycerin or propylene glycol; the chelating agent includes, but is not limited to, tetrasodium glutamate diacetate; the pH adjuster includes, but is not limited to, citric acid or lactic acid; the preservative includes, but is not limited to, Kathon or phenoxyethanol; the antibacterial agent includes, but is not limited to, a combination of diclosan and plant extracts, with a mass ratio of diclosan to plant extracts of 1:0 to 1:1; and the enzyme preparation includes, but is not limited to, a combination of protease and cellulase, with a mass ratio of protease to cellulase of 1:0.1 to 1:1.

[0016] The beneficial effects of this invention are:

[0017] 1. A directional stripping agent is used as the core component of the liquid composition. This stripping agent is amphiphilic and plays a "directional stripping" function at the fiber / dirt interface. On the one hand, the high cationic charge makes the dirt stably suspended in the washing liquid through electrostatic repulsion; on the other hand, the polymer thin layer deposited on the fiber surface can reduce the interfacial adhesion between oil and fiber, making stubborn dirt easier to peel off.

[0018] 2. It maintains high charge density and good solubility under neutral to weakly alkaline conditions (pH 6.0~9.0) and low temperature conditions (20~40℃), making it suitable for the gentle washing and care needs of underwear and delicate fabrics;

[0019] 3. Due to the selective deposition effect of the xylan backbone on the fiber surface and its high molecular weight, the polymer can gradually accumulate and continue to exert its anti-fouling effect after multiple washes, significantly delaying the graying and hardening of the fabric. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a simplified schematic diagram of the apparatus for preparing the washing composition;

[0022] Figure 2 This is a schematic diagram showing the installation positions of the various components on the tank.

[0023] Figure 3 yes Figure 2 A simplified enlarged diagram of point A in the middle;

[0024] The attached figures are labeled as follows: 1. Vacuum pump; 2. Sealing door; 3. Refrigeration unit; 4. Air inlet pipe; 5. Support rod; 6. Support foot; 7. Control valve; 8. Discharge pipe; 9. Cooling coil; 10. Tank body; 11. Inner pipe; 12. Air inlet buffer box; 13. Aeration disc. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Example 1

[0029] A long-lasting detergent liquid composition containing a fiber-grade directional stripper, comprising, by weight percentage: 6% sodium dodecylbenzenesulfonate, 8% sodium fatty alcohol polyoxyethylene ether sulfate, 10% fatty alcohol polyoxyethylene ether, 3% glycerol, 3% alkyl glucose, 2.5% sodium hydroxide, 0.2% tetrasodium diacetate of glutamate, 1% cationic xylan graft polymer, 0.2% protease, 0.1% citric acid, 0.1% cellulase, 0.2% fragrance, 0.1% Kathon, 0.1% diclosan, 0.5% sodium chloride, and the balance being deionized water.

[0030] The specific method for preparing the liquid detergent composition includes the following steps:

[0031] At room temperature, tetrasodium glutamate diacetate, sodium dodecylbenzenesulfonate, and sodium hydroxide were stirred until a clear and transparent solution was obtained to obtain phase A.

[0032] Add sodium fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether, glycerol, and alkyl glucose to phase A and stir until homogeneous to obtain phase B;

[0033] After adding citric acid to phase B to adjust the pH value, cationic xylan graft polymer, protease, cellulase, fragrance, diclosan, and Kathon are added one after another and stirred evenly. Then, sodium chloride is used to adjust the viscosity to the optimal level to obtain fiber-grade directional peeling long-lasting stain-removing underwear laundry detergent.

[0034] The pH of the washing composition prepared in this embodiment is approximately 6-8.

[0035] Example 2

[0036] A long-lasting liquid detergent composition containing a fiber-grade directional stripper, comprising, by weight percentage: 5% sodium dodecylbenzenesulfonate, 8% sodium fatty alcohol polyoxyethylene ether sulfate, 12% fatty alcohol polyoxyethylene ether, 4% glycerol, 2% alkyl glucose, 2.3% sodium hydroxide, 0.2% tetrasodium diacetate of glutamate, 1% cationic xylan graft polymer, 0.2% protease, 0.1% citric acid, 0.1% cellulase, 0.3% fragrance, 0.2% phenoxyethanol, 0.08% diclosan, 0.005% eucalyptus leaf extract, 0.4% sodium chloride, and the balance being deionized water.

[0037] The method for preparing the liquid washing composition includes the following steps:

[0038] At room temperature, tetrasodium glutamate diacetate, sodium dodecylbenzenesulfonate, and sodium hydroxide were stirred until a clear and transparent solution was obtained to obtain phase A.

[0039] Add sodium fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether, glycerol, and alkyl glucose to phase A and stir until homogeneous to obtain phase B;

[0040] After adding citric acid to phase B to adjust the pH value, cationic xylan graft polymer, protease, cellulase, fragrance, diclosan, phenoxyethanol, and eucalyptus leaf extract were added one after another and stirred evenly. Then, sodium chloride was used to adjust the viscosity to the optimal level to obtain fiber-grade directional peeling long-lasting stain-removing underwear laundry detergent.

[0041] The pH of the washing composition prepared in this embodiment is approximately 6-8.

[0042] Example 3

[0043] A long-lasting liquid detergent composition containing a fiber-grade directional stripper, comprising, by weight percentage: 4% dodecylbenzenesulfonic acid, 8% sodium fatty alcohol polyoxyethylene ether sulfate, 13% fatty alcohol polyoxyethylene ether, 2% glycerol, 5% alkyl glucose, 2.3% sodium hydroxide, 0.2% tetrasodium glutamate diacetate, 0.5% cationic xylan graft polymer, 0.2% protease, 0.1% citric acid, 0.1% cellulase, 0.3% fragrance, 0.2% phenoxyethanol, 0.05% diclosan, 0.008% eucalyptus leaf extract, 0.4% sodium chloride, and the balance being deionized water.

[0044] The preparation method of the liquid washing composition is described in Example 2.

[0045] The pH of the washing composition prepared in this embodiment is approximately 6-8.

[0046] Example 4

[0047] A long-lasting detergent liquid composition containing a fiber-grade directional stripper, comprising, by weight percentage: 6% dodecylbenzenesulfonic acid, 9% sodium fatty alcohol polyoxyethylene ether sulfate, 12% fatty alcohol polyoxyethylene ether, 3% glycerol, 3% alkyl glucose, 2.5% sodium hydroxide, 0.2% tetrasodium glutamate diacetate, 1% cationic xylan graft polymer, 0.25% protease, 0.1% citric acid, 0.1% cellulase, 0.2% fragrance, 0.1% Kathon, 0.1% diclosan, 0.3% sodium chloride, and the balance being deionized water.

[0048] The preparation method of the liquid washing composition is described in Example 1.

[0049] The pH of the washing composition prepared in this embodiment is approximately 6-8.

[0050] The cationic xylan graft polymers used in Examples 1 to 4 above are all the same cationic xylan graft polymers, whose structure includes a xylan backbone and cationic side chains grafted onto it.

[0051] The cationic side chain contains repeating units of any cationic monomer represented by general formula (I):

[0052] CH2=CR1-COR2-(CH2)2-N + (CH3)3X - (I)

[0053] Where R1 is H or CH3, R2 is O or NH, and X - For Cl - or CH30SO3 - .

[0054] The number average molecular weight (Mn) of the xylan backbone is 5000-20000 Da, the weight average molecular weight (Mw) is 8000-40000 Da, the degree of substitution is 0.5-2, and the total mass of the cationic side chains grafted onto it accounts for 80-200% of the mass of the xylan backbone.

[0055] Its number-average molecular weight (Mn) is 10,000-150,000 Da, its weight-average molecular weight (Mw) is 30,000-400,000 Da, its polydispersity (Mw / Mn) is 1.5-3.0, and its charge density is 0.5-5 meq / g.

[0056] Comparative Example 1

[0057] A long-lasting stain-removing liquid washing composition containing a fiber-grade directional stripping agent, wherein the underwear washing formula differs from that of Example 1 only in that it does not include cationic xylan polymers in the components, while the addition amounts of the remaining components remain unchanged, and the preparation method is the same as that of Example 1.

[0058] Comparative Example 2

[0059] A long-lasting stain-removing liquid washing composition containing a fiber-grade directional stripper, wherein the lingerie washing formula differs from that of Example 1 only in that it does not include cationic xylan polymers in the components, and the stain anti-redeposition agent used is modified polyethyleneimine (MPEI) added at 1% by weight, while the addition amounts of the remaining components remain unchanged, and the preparation method is the same as that of Example 1.

[0060] Comparative Example 3

[0061] A long-lasting stain-removing liquid washing composition containing a fiber-grade directional stripper, wherein the lingerie washing formula differs from that of Example 1 only in that it does not include cationic xylan polymers in the components, uses a stain anti-redeposition agent, adopts modified styrene-acrylic acid copolymer (SAA) and adds it at 1% by weight, while the addition amounts of the remaining components remain unchanged, and the preparation method is the same as that of Example 1.

[0062] Test 1: Stain Removal Power Test

[0063] The detergency test of the long-lasting detergent liquid washing composition containing fiber-grade directional stripping agent was conducted in accordance with GB / T13174 "Determination of detergency and cyclic washing performance of detergents for clothing". Table 1 shows the comparison of the detergency values ​​of the laundry detergents prepared in Examples 1-4 and Comparative Examples 1-3 on carbon black soiled cloth, protein soiled cloth, and sebum soiled cloth with the detergency values ​​of the standard laundry detergent.

[0064] Table 1

[0065]

[0066] As can be seen from the comparative tests of the examples and comparative examples, the long-lasting stain-removing liquid washing composition of this fiber-grade directional stripper has a very good stain removal effect, and its stain removal effect on the three types of soiled cloths is better than that of the sample with added ordinary anti-redeposition agent.

[0067] Test 2: Circulating Washing Test

[0068] The cyclic washing test of the long-lasting detergency liquid detergent composition containing fiber-grade directional stripping agent was conducted in accordance with GB / T13174 "Determination of detergency and cyclic washing performance of detergents for clothing". The final results are shown in Table 2.

[0069] Table 2

[0070]

[0071] As can be seen from the comparative tests of the examples and comparative examples, the long-lasting cleaning liquid washing composition of this fiber-grade directional stripper has a very high whiteness retention in the cyclic cleaning test, which is higher than the whiteness retention value of ordinary detergents containing anti-redeposition agents, and has excellent long-lasting cleaning ability.

[0072] Example 5

[0073] A preparation apparatus adapted to the preparation methods shown in Examples 1 to 4 above, the structure of which is shown in the attached figure. Figure 1 ~Appendix Figure 3 As shown in the image.

[0074] First, the main body of the device is a tank 10. Support legs 6 are installed at the bottom of the tank 10. The support legs 6 are located outside the tank 10. Cooling coils 9 are wrapped around the internal cavity of the tank wall of the tank 10. Both ends of the cooling coils 9 are located in the tank 10. Cold water with a temperature of 4 to 10 degrees Celsius flows inside the cooling coils 9.

[0075] The top of the tank 10 is provided with a feed inlet, and a sealing door 2 is installed at the feed inlet to seal it.

[0076] An aeration disc 13 is arranged inside the tank 10, and the aeration disc 13 is located at the bottom of the tank 10. An air inlet pipe 4 is connected to the aeration disc 13. The air inlet of the air inlet pipe 4 is located outside the tank 10. A refrigeration unit 3 is installed at the air inlet of the air inlet pipe 4. The refrigeration unit 3 is used to cool down the gas passing through the air inlet pipe 4. After the gas is cooled down, it is transported to the aeration disc 13 for aeration. The refrigeration unit 3 is used to cool down the temperature of the gas transported into the aeration disc 13 to no more than 10 degrees Celsius.

[0077] To ensure the stability of the air intake pipe 4 installation, several support rods 5 are installed on the outer wall of the tank body 10. The two ends of the support rods 5 are welded and fixed to the air intake pipe 4 and the outer wall of the tank body 10, respectively.

[0078] In this device, a vacuum pump 1 is installed on the top of the tank 10, and one end of the vacuum pump 1 is connected to an inner pipe 11. One end of the inner pipe 11 is equipped with a diamond-shaped air intake buffer box 12. Both the inner pipe 11 and the air intake buffer box 12 are located inside the tank 10.

[0079] A discharge pipe 8 is installed at the bottom of the device, and a control valve 7 is installed on the discharge pipe 8.

[0080] The method of using this device is as follows: first, pour the liquid material into the pipe body through the inlet, and then seal the inlet with the sealing door 2.

[0081] After the external air supply equipment is installed, it blows air into the air supply pipe. The gas is cooled by the refrigeration unit 3 and then cooled to below 10 degrees Celsius before entering the aeration plate 13 for aeration.

[0082] Simultaneously, the vacuum pump 1 located at the top of the tank 10 starts to create a vacuum. Aeration disc 13 aerates the liquid below, while the vacuum pump creates a vacuum above the liquid surface. The air pressure above the liquid surface is lower than the ambient atmospheric pressure. This combination of vacuuming above and aeration below successfully utilizes airflow to continuously impact the liquid. This impact-type agitation not only provides better mixing than traditional mechanical agitation but also reduces dead zones. Furthermore, this agitation-combined agitation process increases the collision between liquid components, breaking down clumps of particles into powder and dissolving them, allowing each component to fully dissolve in the liquid. Because the gas temperature is relatively low during this process, the material temperature does not rise, thus preventing chemical reactions between the materials. Meanwhile, to ensure that the various components of the liquid do not volatilize, the coolant flowing into the cooling coil exchanges heat fully with the liquid in the tank. This ensures that the liquid components are kept at a constant temperature (4~10 degrees Celsius) during preparation. This structural design can ensure that the constant temperature is maintained during preparation and that the liquid does not volatilize during aeration, maintaining the concentration and pH of the entire reaction liquid, and preventing the various active components from becoming inactive.

[0083] Meanwhile, in this device, since a diamond-shaped air intake buffer box 12 is installed at one end of the inner pipe 11, when the vacuum pump 1 is drawing a vacuum, even if liquid is drawn into the inner pipe 11, it can still be buffered and retained by the huge buffer cavity inside the air intake buffer box 12 (which never comes into contact with the liquid surface inside the tank 10), thereby preventing liquid from being sucked into the vacuum pump.

[0084] When the washing components are prepared in the middle of this device, the vacuum pump 1 can be turned on in reverse. The vacuum pump 1 pumps gas into the tank 10, and gas is still being supplied into the tank 10 through the gas supply pipe throughout the process. Then the control valve 7 is opened, and the washing components are discharged from the discharge pipe 8.

[0085] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A long-lasting liquid detergent composition containing a fiber-grade directional stripping agent, characterized in that, By weight percentage, it includes 5-13% sodium dodecylbenzenesulfonate, 3-8% sodium fatty alcohol polyoxyethylene ether sulfate, 10-18% fatty alcohol polyoxyethylene ether, 2-5% humectant, 1-5% alkyl glucoside, 1-6% sodium hydroxide, 0.1-0.5% chelating agent, 0.1-3% fiber-grade directional stripping agent, 0.1-0.5% enzyme preparation, 0.1-0.5% fragrance, 0.1-0.5% preservative, 0.05-1% pH adjuster, 0.01-0.5% antibacterial agent, 0-2% sodium chloride, and the remainder being deionized water; The fiber-grade directional release agent is a cationic xylan graft polymer, comprising a xylan backbone and cationic side chains grafted thereon. The cationic side chains of the fiber-grade directional release agent comprise those of the general formula... CH2=CR1-COR2-(CH2)2-N + (CH3)3X - Represents a repeating unit of any cationic monomer. Where R1 is H or CH3, R2 is O or NH, and X - For Cl - or CH30SO3 - .

2. The long-lasting liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The number average molecular weight of the xylan backbone of the fiber-grade directional stripping agent is 5000-20000 Da, the weight average molecular weight is 8000-40000 Da, the degree of substitution is 0.5-2, and the total mass of the cationic side chains grafted onto it accounts for 80-200% of the mass percentage of the xylan backbone.

3. The long-lasting stain-removing liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The fiber-grade directional stripping agent has a number-average molecular weight of 10,000-150,000 Da, a weight-average molecular weight of 30,000-400,000 Da, a polydispersity of 1.5-3.0, and a charge density of 0.5-5 meq / g.

4. The long-lasting stain-removing liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The moisturizer includes glycerin or propylene glycol.

5. The long-lasting detergent liquid composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The chelating agent includes tetrasodium glutamate diacetate.

6. The long-lasting liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The pH adjuster includes citric acid or lactic acid.

7. The long-lasting liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, Preservatives include Kathon or phenoxyethanol.

8. The long-lasting liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The enzyme preparation comprises a combination of protease and cellulase, and the mass ratio of protease to cellulase is 1:0.1 to 1:

1.

9. The long-lasting liquid detergent composition containing a fiber-grade directional stripping agent according to claim 1, characterized in that, The antibacterial agent includes a combination of diclofenac and plant extracts, with a mass ratio of diclofenac to plant extracts of 1:0 to 1:1.

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