Laundry coagulated bead feed liquid with color crossing prevention performance and preparation method of laundry coagulated bead feed liquid

Abstract

The invention relates to the technical field of detergents, and discloses a laundry condensate bead feed liquid with cross-color prevention performance and a preparation method thereof, the laundry condensate bead feed liquid comprises the following components by mass: 0.1-1.0% of a polyvinylpyrrolidone anti-cross-color agent, 0.1-1.0% of an anti-cross-color agent, 0.1-1.0% of an anti-cross-color agent, 0.1-1.0% of an anti-cross-color agent and the balance of water. 5-30% of glycerin; 5-30% of propylene glycol; 10-25% of an ammonium salt anionic surfactant; 0-10% of a sodium salt anionic surfactant; 5 to 30% of a nonionic surfactant, except for a polyvinylpyrrolidone anti-cross color agent; 3 to 10% of PEG-40 hydrogenated castor oil; 0-5% of an alkaline regulator; and the balance of auxiliaries. The auxiliary agent comprises water. According to the invention, the polyvinylpyrrolidone anti-cross-color agent is applied to the laundry condensate bead feed liquid, and the laundry condensate bead feed liquid with excellent anti-cross-color performance and decontamination performance is obtained by adding the ammonium salt anionic surfactant and the PEG-40 hydrogenated castor oil for synergistic effect and adjusting the proportion of the components.

Description

Technical Field

[0001] This invention relates to the technical field of detergents, and in particular to a laundry detergent pod liquid with anti-color bleeding properties and its preparation method. Background Technology

[0002] In the detergent industry, laundry pods have gained widespread market recognition due to their significant convenience, vibrant colors, and diverse forms. Their multi-functional properties (such as high-efficiency sterilization, long-lasting fragrance, and superior stain removal based on high-concentration formulas) further enhance their appeal. If laundry pods also possess color-protecting and anti-bleeding properties, they can effectively solve the common dye migration problem faced by consumers when mixing laundry, becoming a key technological advantage that meets core needs.

[0003] Currently, adding functional color-protecting agents to detergents is the mainstream technical solution for addressing the color protection problem of clothing. For example, patent CN104450278B discloses an anti-staining and color-protecting laundry detergent, the main anti-staining component of which is an anti-staining agent produced in-house by the company. However, anti-staining agents are generally expensive, and the amount of anti-staining agent added in this patent is relatively high (2-10%), resulting in high costs and a low cost-effectiveness of the formula. Patent CN111057624A discloses a highly concentrated anti-color-bleeding laundry detergent, which uses polyvinylpyrrolidone compounded with polyethyleneimine to improve the system's anti-color-bleeding performance. However, the composition in this patent is used in highly concentrated detergents, which is completely different from laundry pod systems. Because too much water cannot be added to laundry pod solutions, otherwise the pod film will dissolve and become soft, multiple solvents need to be added. Polyvinylpyrrolidone anti-color-bleeding agents have strong complexing effects, and their solubility decreases at low water content, making turbidity more likely. Therefore, it is difficult to achieve a transparent and stable solution while maintaining performance and color after adding anti-color-bleeding agents. Thus, while many patents disclose detergent compositions with anti-color-bleeding properties, their application in laundry pods has its shortcomings. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a laundry detergent pod solution with anti-color bleeding properties and its preparation method. Reducing the content of anionic surfactants in the solution can improve anti-color bleeding performance; however, reducing the anionic surfactant content can lead to turbidity and precipitation in solutions containing polyvinylpyrrolidone (PVP) anti-color bleeding agents. By adding an ammonium salt-based anionic surfactant and PEG-40 hydrogenated castor oil, the stability of the solution containing PPVP anti-color bleeding agents can be improved while reducing the anionic surfactant content, ensuring good anti-color bleeding performance. The color difference between the fabric sample before and after washing is <0.5 (almost imperceptible to the naked eye).

[0005] The objective of this invention is achieved through the following technical solution: In a first aspect, the present invention provides a laundry detergent pod liquid with anti-color bleeding properties, comprising the following components by mass percentage: 0.1-1.0% polyvinylpyrrolidone anti-color bleeding agent; 5-30% glycerin; 5-30% propylene glycol; 10-25% ammonium salt anionic surfactant; 0-10% sodium salt anionic surfactant; 5-30% nonionic surfactant other than polyvinylpyrrolidone anti-color bleeding agent; 3-10% PEG-40 hydrogenated castor oil; 0-5% alkalinity regulator; and the balance of additives; wherein the additives include water.

[0006] Laundry detergent pods and liquid laundry detergent have very different formulations. Regular liquid laundry detergent contains approximately 60-80% water, while concentrated liquid laundry detergent contains 40-60% water. Laundry detergent pods, however, generally do not contain more than 20% water due to considerations of film solubility. Propylene glycol and glycerin are cost-effective and have low odor, are gentle on clothing, and are relatively mild. Therefore, in this invention, propylene glycol and glycerin are used as the fixed solvent. However, this invention uses polyvinylpyrrolidone (PVP) anti-bleeding agents as functional additives to prevent color bleeding. During the research process, it was found that when the proportion of anionic surfactants was reduced and the proportion of nonionic surfactants was increased, the anti-bleeding performance of PPVP anti-bleeding agents was significantly improved. However, because polyvinylpyrrolidone anti-bleeding agents have a strong ability to form hydrogen bonds and complexes, they compete with nonionic surfactants for water molecules. Glycerin is a strong desiccant, and when hydration is insufficient, the hydrophobic segments of the anti-bleeding agent will combine with the alkyl chains of the nonionic surfactant, resulting in flocculation and thus causing turbidity. The higher the content of nonionic surfactant, the more obvious the turbidity.

[0007] The above problems can be solved by adding anionic surfactants. Anionic surfactants can ionize in water to generate a strong negative charge. These anionic surfactants coat the surface of polyvinylpyrrolidone-based anti-bleeding agents / nonionic surfactant aggregates, forming a charge shielding layer. This generates strong electrostatic repulsion between particles, preventing hydrophobic chains from further agglomerating and forming larger aggregates. However, considering the impact of anionic surfactants on anti-bleeding performance, the anionic surfactant content needs to be controlled. Reducing the anionic surfactant content leads to insufficient electrostatic repulsion to prevent the formation of larger aggregates. Furthermore, micelles formed with lower anionic surfactant content are not dense enough, allowing the propyl groups of propylene glycol to insert into the micelle nuclei, forming aggregates and causing flocculation and turbidity in the composition. Therefore, there is a significant contradiction between simultaneously considering anti-bleeding performance and composition stability.

[0008] Therefore, this invention selects to add PEG-40 hydrogenated castor oil and ammonium salt anionic surfactants to solve the problem of system instability caused by the addition of polyvinylpyrrolidone anti-color bleeding agents.

[0009] First, ricinoleic acid in PEG-40 hydrogenated castor oil provides hydrophobic anchors, attracting the hydrophobic segments of polyvinylpyrrolidone (PVP) anti-bleeding agents and nonionic surfactants. This allows the long PEG chains to form hydrophilic protective layers on the surfaces of both PPVP and nonionic surfactants, effectively mitigating the water-repelling effect of glycerol. However, due to the low water content in the bead-forming solution, the hydrophobic segments of PPVP and nonionic surfactants will still bind, although the reduced water-repelling effect of glycerol weakens the aggregation. Therefore, anionic surfactants are added simultaneously for synergistic effects. Anionic surfactants ionize in water to generate strong negative charges. These anionic surfactants coat the surface of the PPVP / nonionic surfactant aggregates, forming a charge shielding layer. Strong electrostatic repulsion between particles prevents the hydrophobic chains from further agglomerating and forming larger aggregates. Without PEG-40 hydrogenated castor oil to reduce aggregation, anionic surfactants would also struggle to cover the aggregate surface. Therefore, both are indispensable and work synergistically.

[0010] Secondly, the counterion is an ammonium salt (NH4+). 4+ This invention involves partially or completely replacing sodium-ionized anionic surfactants with ammonium-ionized counterions in the composition. Common anionic surfactants used in laundry detergent pods are sodium-ionized counterions. This invention discovers that replacing sodium-ionized counterions with ammonium-ionized anionic surfactants in the composition can solve the problem of poor compatibility with propylene glycol. This is because NH4+... 4+ It has a stronger ability to form hydrogen bonds, therefore its solubility in propylene glycol is much greater than that of the sodium salt, and NH... 4+ The hydration radius is greater than Na + Furthermore, it can reduce the risk of small molecule sulfate crystallization. Therefore, this invention improves the compatibility between anionic surfactants and propylene glycol by using anionic surfactants with ammonium counterions, thereby synergistically enhancing the stability of the feed solution with PEG-40 hydrogenated castor oil.

[0011] Preferably, the polyvinylpyrrolidone anti-bleeding agent includes one or more of Flosoff CCP, Sokalan HP66 K, Sokalan HP56 K, HD56 K, Reilline 350, and Reilline 4035.

[0012] Preferably, the ammonium salt anionic surfactant includes one or more of the following: ammonium salts of linear alkylbenzene sulfonate, ammonium salts of alkyl sulfate, ammonium salts of alkyl ether sulfate, ammonium salts of fatty alcohol polyoxyethylene ether sulfate, and ammonium salts of fatty acid salts (soaps).

[0013] Currently, the counterion in mainstream anionic surfactants is K. + Na + and NH 4+ In some special products, the counterion is Ca. 2+ and Mg 2+ Anionic surfactants, but excluding NH4+ 4+ In addition, they all have a weak ability to form hydrogen bonds.

[0014] Preferably, the sodium salt anionic surfactant includes one or more of the following: sodium salts of linear alkylbenzene sulfonate, sodium salts of alkyl sulfate, sodium salts of alkyl ether sulfate, sodium salts of fatty alcohol polyoxyethylene ether sulfate, and sodium salts of fatty acids.

[0015] Preferably, the nonionic surfactant, excluding polyvinylpyrrolidone anti-bleeding agents, includes one or more of alkyl glycosides, linear fatty alcohol polyoxyethylene ethers, isomeric fatty alcohol polyoxyethylene ethers, and modified oil ethoxylates.

[0016] Preferably, the alkalinity regulator has a mass percentage of 0.5-5%; the alkalinity regulator is one or more of triethanolamine, monoethanolamine, and dimethylethanolamine.

[0017] If sodium salt is used as an alkaline regulator, small molecule sodium salt will precipitate out after the moisture content decreases after a long period of storage. However, this invention uses organic amine as an alkaline regulator, which has a large ammonium ion hydration radius and a low risk of crystallization.

[0018] Preferably, the adjuvant further includes 0-5% by mass of polymeric adjuvant, 0-5% by mass of enzyme preparation and 0-5% by mass of preservative; more preferably, the adjuvant further includes 0.5-5% by mass of polymeric adjuvant, 0.5-5% by mass of enzyme preparation and 0.5-5% by mass of preservative.

[0019] Preferably, the enzyme preparation includes one or more of protease, amylase, cellulase, lipase and mannanase.

[0020] Preferably, the polymeric additives include one or more of polyacrylate, polyacrylic acid-maleate, maleate / acrylate random copolymer, polyethyleneimine, methylcarboxymethyl cellulose, and sodium carboxymethyl cellulose.

[0021] Preferably, the preservative includes one or more of phenoxyethanol, sodium benzoate, methylisothiazolinone, and methylchloroisothiazolinone.

[0022] Secondly, the present invention also provides a method for preparing laundry detergent pod liquid with anti-color bleeding properties, comprising the following steps: S1: Add propylene glycol, glycerin and alkalinity regulator to water and stir until a mixed liquid is obtained; S2: Add ammonium salt anionic surfactant, sodium salt anionic surfactant and nonionic surfactant to the mixed liquid and stir until homogeneous; S3: Add the remaining components to the mixed liquid and stir well to obtain laundry detergent pod liquid.

[0023] Compared with the prior art, the present invention has the following beneficial effects: This invention applies polyvinylpyrrolidone (PVP) anti-bleeding agents to laundry pod solutions. By adding anionic surfactants with ammonium counterions and PEG-40 hydrogenated castor oil in a synergistic effect, the turbidity problem caused by PPVP anti-bleeding agents in laundry pod solutions with propylene glycol and glycerin as the main solvents is solved. Furthermore, by adjusting the composition ratio, a laundry pod solution with excellent anti-bleeding and detergency properties is developed. Detailed Implementation

[0024] The following specific embodiments illustrate the technical solution of the present invention, but the scope of protection of the present invention is not limited thereto. All raw materials used in the present invention are commercially available industrial raw materials, and different surfactants have different water contents. Unless otherwise specified, the contents in the table below are all pure content.

[0025] The laundry detergent pod liquid with anti-color bleeding properties of this invention comprises the following components by mass percentage: 0.1-1.0% polyvinylpyrrolidone anti-color bleeding agent; 5-30% glycerin; 5-30% propylene glycol; 10-25% ammonium salt anionic surfactant; 0-10% sodium salt anionic surfactant; 5-30% nonionic surfactant other than polyvinylpyrrolidone anti-color bleeding agent; 3-10% PEG-40 hydrogenated castor oil; 0-5% alkalinity regulator; 0-5% enzyme preparation; 0-5% polymer additives; 0-5% preservative; and water as the balance.

[0026] The preparation of the above-mentioned laundry detergent pod liquid includes the following steps: S1: Add propylene glycol, glycerin and alkalinity regulator to water and stir until a mixed liquid is obtained; S2: Add ammonium salt anionic surfactant, sodium salt anionic surfactant and nonionic surfactant to the mixed liquid and stir until homogeneous; S3: Add the enzyme preparation, polymer additives, preservatives, polyvinylpyrrolidone anti-color bleeding agent and PEG-40 hydrogenated castor oil to the mixed liquid, stir evenly, and obtain the laundry detergent pod liquid.

[0027] In specific embodiments of the present invention, the polyvinylpyrrolidone anti-fading agent includes one of Flosoff CCP, Sokalan HP66 K, Sokalan HP56 K, HD56 K, Reilline 350, and Reilline 4035.

[0028] In specific embodiments of the present invention, ammonium salt anionic surfactants include one or more of the following: ammonium salts of linear alkylbenzene sulfonate, ammonium salts of alkyl sulfates, ammonium salts of alkyl ether sulfates, ammonium salts of fatty alcohol polyoxyethylene ether sulfates, and ammonium salts of fatty acid salts (soaps).

[0029] In specific embodiments of the present invention, sodium salt anionic surfactants include one or more of sodium salts of linear alkylbenzene sulfonate, sodium salts of alkyl sulfate, sodium salts of alkyl ether sulfate, sodium salts of fatty alcohol polyoxyethylene ether sulfate, and sodium salts of fatty acids.

[0030] In specific embodiments of the present invention, the nonionic surfactants other than polyvinylpyrrolidone anti-color bleeding agents include one or more of alkyl glycosides, linear fatty alcohol polyoxyethylene ethers, isomeric fatty alcohol polyoxyethylene ethers, and modified oil ethoxylates.

[0031] In a specific embodiment of the present invention, the alkalinity regulator is one or more of triethanolamine, monoethanolamine, and dimethylethanolamine.

[0032] In specific embodiments of the present invention, the enzyme preparation includes one or more of protease, amylase, cellulase, lipase and mannanase.

[0033] In specific embodiments of the present invention, polymeric additives include one or more of polyacrylate, polyacrylic acid-maleate, maleate / acrylate random copolymer, polyethyleneimine, methylcarboxymethyl cellulose, and sodium carboxymethyl cellulose.

[0034] In specific embodiments of the present invention, the preservative includes one or more of phenoxyethanol, sodium benzoate, methylisothiazolinone, and methylchloroisothiazolinone.

[0035] In specific embodiments of the present invention, the raw materials used are abbreviated as follows: LAS: sodium linear alkylbenzene sulfonate; AES: sodium fatty alcohol polyoxyethylene ether sulfate; AESA: ammonium fatty alcohol polyoxyethylene ether sulfate; LASA: ammonium linear alkylbenzene sulfonate; AEO9: fatty alcohol polyoxyethylene ether; SOE: modified oil ethoxylate; CCP: polyvinylpyrrolidone anti-color bleeding agent.

[0036] The performance tests of the laundry detergent pod liquid prepared above are as follows: (1) Evaluation method for anti-color bleeding performance: Add 0.5g of the test composition solution (2g of national standard laundry detergent) to a vertical cleaning tank, add 250ppm hard water to 1000g, stir to dissolve, add 0.5g / L of direct black dye solution (1%), stir to disperse thoroughly, put in standard JB00 cotton white cloth (6×6cm, whiteness measured with a colorimeter before washing for comparison), keep the temperature at 40℃, wash for 30min, after washing, take out the cloth sample, rinse twice and air dry naturally. Test the color difference value ΔE of the cloth sample before and after washing. As shown in Table 1, the smaller the color difference value ΔE, the smaller the color difference and the better the anti-color bleeding effect; the larger the color difference value ΔE, the larger the color difference and the worse the anti-color bleeding effect.

[0037] Table 1 Relationship between ΔE value and human visual perception

[0038] (2) Evaluation method of detergency: According to the three standard soiled cloths JB-01 (carbon black soiled cloth), JB-02 (protein soiled cloth) and JB-03 (sebum soiled cloth) specified in GB / T 13174, and standard laundry detergent, the three types of soiled cloths were cut into 6×6cm circular pieces (whiteness F1 was measured with a colorimeter before washing). 0.5g of the laundry detergent pod solution to be tested (2g of national standard laundry detergent) was added to each of the three types of soiled cloths in a vertical cleaning tank. 250ppm hard water was added to a total volume of 1000g, stirred to dissolve, and kept at a constant temperature of 30℃ for 20 minutes. After washing, the cloth samples were removed, rinsed twice, and air-dried naturally. The whiteness value F2 of the soiled cloth after washing was tested, and the difference in whiteness before and after washing was calculated (△F=F2-F1). The ratio R of the test solution to the standard laundry detergent was calculated (R=△F test solution / △F standard laundry detergent). If ≥1, the detergency is qualified.

[0039] (3) Evaluation method of stability of laundry beads: Laundry beads made from laundry bead liquid were placed at room temperature, 45℃ oven and 2℃ refrigerator for a period of one month to observe whether crystallization and rupture occurred in the appearance of liquid and outer membrane of beads.

[0040] Examples 1-11 and Comparative Examples 1-17 S1: Add propylene glycol, glycerin and alkalinity regulator to water and stir until a mixed liquid is obtained; S2: Add ammonium salt anionic surfactant, sodium salt anionic surfactant and nonionic surfactant to the mixed liquid and stir until homogeneous; S3: Add the enzyme preparation, polymer additives, preservatives, polyvinylpyrrolidone anti-color bleeding agent and PEG-40 hydrogenated castor oil to the mixed liquid, stir evenly, and obtain the laundry detergent pod liquid. S4: Laundry detergent pods can be prepared by coating the liquid detergent pods with a film.

[0041] Table 2. Raw material formulations and appearance of laundry detergent pod solutions in Examples 1-2 and Comparative Examples 1-3

[0042] Table 3. Colorfastness and appearance stability of laundry detergent pods in Comparative Example 1 and Examples 1-2

[0043] As shown in Table 2, Comparative Example 2 was based on Comparative Example 1 with the addition of CCP, which caused the solution to become turbid. A comparison of Comparative Examples 2-3 and Examples 1-2 shows that appropriately increasing the content of AES (anionic surfactant with a sodium counterion) can make the solution clear and transparent. This is because the hydrophilic head group of AES is SO3. ⁻ It ionizes in water to produce a strong negative charge. When AES coexists with CCP / AEO9, SO3... ⁻ Covering the surface of CCP / AEO9 aggregates forms a charge shielding layer, while strong electrostatic repulsion between molecules prevents hydrophobic chains from further aggregating and forming larger aggregates, thus resulting in a clear and transparent laundry pod liquid. However, Examples 1-2 have two drawbacks, as shown in Table 3. After examining the laundry pod liquid from Examples 1-2 into laundry pods, due to the excessively high AES content and the presence of small-molecule sodium sulfate in the AES raw material, noticeable particulate matter precipitation was observed on the membrane surface after less than one month of storage at room temperature. The membrane surface also felt rough to the touch, posing a significant risk to product quality and affecting consumer experience. Furthermore, the anti-color bleeding performance of the liquid was poor. Comparative analysis of Examples 1-2 shows that the anti-color bleeding performance of CCP decreases when the anionic surfactant content is high. Therefore, other solutions are needed to reduce the amount of anionic surfactant to ensure the liquid remains clear and transparent while improving anti-color bleeding performance.

[0044] Table 4. Raw material formulation and appearance of laundry detergent pod liquid in Example 3 and Comparative Examples 4-7

[0045] Table 5. Colorfastness and appearance stability of laundry detergent pods in Example 3

[0046] As shown in Table 4, Comparative Examples 4-5 and Example 3 were based on Comparative Example 2 with the addition of PEG-40 hydrogenated castor oil. When the amount of PEG-40 hydrogenated castor oil reached a certain level, the laundry detergent pod liquid could achieve a clear and transparent appearance. However, a comparison between Example 3 and Comparative Example 6 shows that, under the same PEG-40 hydrogenated castor oil addition conditions, reducing the AES content still resulted in a cloudy appearance of the laundry detergent pod liquid. Even adding more PEG-40 hydrogenated castor oil in Comparative Example 7 could not make the liquid appear clear and transparent. This indicates that the electrostatic repulsion effect of AES and the water-reducing effect of PEG-40 hydrogenated castor oil need to work synergistically, and the content of anionic surfactants with sodium counterions cannot be less than 25% (pure) to obtain a clear and transparent laundry detergent pod liquid, while also improving the anti-color bleeding performance of the liquid. However, as shown in Table 5, the laundry detergent pod liquid in Example 3 is clear and transparent, but when it is packaged into laundry detergent pods, small crystal particles still precipitate out. Compared with the addition of 35% AES (Example 1), the amount of precipitated particles is less and the precipitation time is longer.

[0047] Table 6. Raw material formulations and appearance of laundry detergent pod solutions in Examples 4-7 and Comparative Examples 8-10

[0048] Table 7. Colorfastness and appearance stability of laundry detergent pods in Examples 4-7 and Comparative Examples 8-9

[0049] Table 8. Stain removal performance of laundry pods in Examples 6-7

[0050] As shown in Table 6, it can be seen from Examples 4-6 that the counterion of AESA is NH4+. + NH4 + The hydration radius is greater than Na + Therefore, by replacing part of the AES with AES, the resulting laundry detergent pod liquid is clear and transparent. Furthermore, as shown in Table 7, no crystallization occurs in the laundry detergent pods of Examples 4-7. However, as can be seen from Comparative Examples 8 and 9, when the AES content is excessive, crystals will precipitate in the resulting laundry detergent pods after prolonged observation.

[0051] In Example 6, AES was completely replaced by AES, and in Example 7, LAS was completely replaced by LASA. The content of anionic surfactants could be reduced from 25% to 15% (pure), while maintaining a clear and transparent appearance, excellent anti-color bleeding performance, and high stability. Furthermore, as shown in Table 8, the detergency of the solutions in Examples 6 and 7 was also satisfactory. Therefore, it is speculated that when the anionic content in the solution is low, two factors may cause turbidity in the system. One is that the aggregation of CCP and nonionic surfactants leads to turbidity, and the low content of anionic surfactants cannot provide strong electrostatic repulsion. The other possibility is that sodium salts and propylene glycol have poor compatibility, while ammonium salts have better compatibility with propylene glycol than sodium salts, because NH4+... + Ammonium salts have a stronger ability to form hydrogen bonds, so their solubility in propylene glycol is much greater than that of anionic surfactants whose counterions are sodium salts. Therefore, replacing sodium salts with ammonium salts can not only prevent crystallization, but also reduce the content of anionic surfactants in the liquid composition to improve the anti-color bleeding performance while maintaining the clarity and transparency of the precursor. Moreover, the stability and detergency of the resulting liquid are both up to standard.

[0052] Table 9. Raw material formulations and appearance of laundry detergent pod solutions in Examples 8-9 and Comparative Examples 11-13

[0053] Table 10. Colorfastness and appearance stability of laundry detergent pods in Examples 8-9 and Comparative Examples 11-13

[0054] As shown in Tables 9 and 10, no crystal precipitation occurred when AES was completely replaced by AES. However, when the content of ammonium salt anionic surfactant was ≥25%, the system's ability to prevent color bleeding was low.

[0055] Table 11. Raw material formulations and appearance of laundry detergent pod solutions in Examples 10-11 and Comparative Examples 14-17

[0056] Table 12: Colorfastness and appearance stability of laundry detergent pods in Examples 10-11

[0057] As shown in Tables 11 and 12, it can be seen from Examples 10 and Comparative Examples 14-15 that reducing the content of PEG-40 hydrogenated castor oil will cause the liquid to become cloudy, indicating that the ability of PEG-40 hydrogenated castor oil to reduce the water-removing effect of glycerol is poor when the content is low. Therefore, the content of PEG-40 hydrogenated castor oil needs to be ≥3%. As shown in Examples 10-11 and Comparative Examples 16-17, it can be seen that while reducing the content of ammonium salt anionic surfactant (≤10%), gradually increasing the content of PEG-40 hydrogenated castor oil does not result in a clear and transparent liquid. This indicates that the ratio of ammonium salt anionic surfactant and PEG-40 hydrogenated castor oil needs to be within a certain range to achieve a good synergistic effect and thus obtain a clear and transparent liquid.

[0058] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A laundry detergent pod liquid with anti-color bleeding properties, characterized in that, Components including the following mass percentages: Polyvinylpyrrolidone anti-fading agent: 0.1~1.0%; Glycerin 5-30%; Propylene glycol 5-30%; Ammonium salt anionic surfactants: 10-25%; Sodium salt anionic surfactants: 0-10%; 5-30% of nonionic surfactants, excluding polyvinylpyrrolidone anti-fading agents; PEG-40 hydrogenated castor oil 3~10%; Alkalinity regulator 0~5%; Excess additives; The additives include water.

2. The laundry detergent pod liquid with anti-color bleeding properties according to claim 1, characterized in that, The ammonium salt anionic surfactants include one or more of the following: linear alkylbenzene sulfonate ammonium salt, alkyl sulfate ammonium salt, alkyl ether sulfate ammonium salt, fatty alcohol polyoxyethylene ether sulfate ammonium salt, and fatty acid salt ammonium salt.

3. The laundry detergent pod liquid with anti-color bleeding properties according to claim 1, characterized in that, The polyvinylpyrrolidone anti-bleeding agents include one or more of Flosoff CCP, Sokalan HP66 K, Sokalan HP56 K, HD56 K, Reilline350, and Reilline 4035.

4. The laundry detergent pod liquid with anti-color bleeding properties according to claim 1, characterized in that, The alkalinity regulator is one or more of triethanolamine, monoethanolamine, and dimethylethanolamine.

5. The laundry detergent pod liquid with anti-color bleeding properties according to any one of claims 1-4, characterized in that, The nonionic surfactants, excluding polyvinylpyrrolidone anti-bleeding agents, include one or more of alkyl glycosides, linear fatty alcohol polyoxyethylene ethers, isomeric fatty alcohol polyoxyethylene ethers, and modified oil ethoxylates.

6. The laundry detergent pod liquid with anti-color bleeding properties according to any one of claims 1-4, characterized in that, The sodium salt anionic surfactants include one or more of the following: sodium salts of linear alkylbenzene sulfonate, sodium salts of alkyl sulfate, sodium salts of alkyl ether sulfate, sodium salts of fatty alcohol polyoxyethylene ether sulfate, and sodium salts of fatty acids.

7. The laundry detergent pod liquid with anti-color bleeding properties according to claim 1, characterized in that, The adjuvants also include polymeric adjuvants, enzyme preparations, and preservatives at a mass percentage of 0-5%.

8. The laundry detergent pod liquid with anti-color bleeding properties according to claim 7, characterized in that, The polymeric additives include one or more of polyacrylate, polyacrylic acid-maleate, maleate / acrylate random copolymer, polyethyleneimine, methylcarboxymethyl cellulose, and sodium carboxymethyl cellulose.

9. The laundry detergent pod liquid with anti-color bleeding properties according to claim 7 or 8, characterized in that, The enzyme preparation includes one or more of protease, amylase, cellulase, lipase, and mannanase.

10. A method for preparing a laundry detergent pod liquid with anti-color bleeding properties as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Add propylene glycol, glycerin and alkalinity regulator to water and stir until a mixed liquid is obtained; S2: Add ammonium salt anionic surfactant, sodium salt surfactant and nonionic surfactant to the mixed liquid and stir until homogeneous; S3: Add the remaining components to the mixed liquid and stir well to obtain laundry detergent pod liquid.

Images