Laundry gel bead with excellent stability and preparation method thereof

Abstract

The invention relates to a laundry gel bead with excellent stability. The laundry gel bead with excellent stability comprises the following components: a surfactant, a modified surfactant, a solvent, a neutralizer, a chelating agent and an auxiliary agent, wherein the modified surfactant is obtained by reacting acrylic acid modified fatty alcohol-polyoxyethylene ether, sodium p-styrenesulfonate and methyl oleate ethoxylate. As the modified surfactant contains a large amount of ethyoxyl and other groups, the modified surfactant can act together with other ethyoxyl-containing surfactants to balance the irritation caused by a large amount of sulfonic acid, saturated fatty acid and other components in the laundry gel bead formula, thereby enhancing the mildness of the laundry gel beads, lowering the irritation of the washed clothes residues, and enhancing the laundry gel bead mildness. The irritation to skin and clothing fibers is effectively reduced; in addition, the modified surface active agent, the anionic surface active agent and the nonionic surface active agent act together, so that the dirt-removing capability of the laundry condensate beads is improved together.

Description

Technical Field

[0001] The invention relates to the technical field of fabric washing, and in particular to a laundry condensate bead with excellent stability and a preparation method thereof. Background Art

[0002] As consumers' demand for efficient washing products continues to increase, laundry beads have become an important development direction for modern detergent products due to their high concentration, easy operation, and strong decontamination. However, due to the high complexity of their formula, certain issues still affect the performance and appearance stability of the product.

[0003] In traditional formulas, surfactants (such as sulfonic acid surfactants and fatty acid surfactants) have strong detergency, but their stability in high and low temperature environments is poor. Especially in high and low temperature environments, sulfonic acid and fatty acid surfactants are prone to crystallization or stratification problems, which affects the appearance and performance of laundry beads, thereby affecting the washing effect and product life. Therefore, how to solve the stability of liquid detergent formulas with high sulfonic acid content is a problem that needs to be considered.

[0004] In addition, the sulfonic acid and fatty acid surfactants in traditional formulas are often highly irritating and may cause discomfort to the skin, especially for users with sensitive skin or clothes that are in contact with the clothes for a long time during washing. Excessive irritation will not only affect the consumer experience, but may also damage the clothing fibers and affect the service life of the clothes. Therefore, how to reduce irritation while ensuring the cleaning effect is an important challenge for the current laundry beads formulation technology.

[0005] In summary, there is an urgent need to design a laundry detergent bead with excellent stability to solve the problems existing in the prior art. Summary of the invention

[0006] Based on this, the present invention provides a laundry detergent bead with excellent stability. In order to solve the above problems, a modified surfactant is added. The modified surfactant can make the performance of the laundry detergent bead more stable at high and low temperatures, and can improve the solubilization ability of the components, thereby avoiding the precipitation or stratification of the laundry detergent bead containing a large amount of sulfonic acid and saturated fatty acids under high and low temperature cycles, or when placed in a high and low temperature environment for a long time.

[0007] One object of the present invention is to provide a laundry condensate bead with excellent stability, wherein the laundry condensate bead with excellent stability comprises the following components in mass fractions:

[0008]

[0009]

[0010] The modified surfactant is obtained by reacting acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate.

[0011] Furthermore, the surfactant is selected from one or more of anionic surfactants, nonionic surfactants and zwitterionic surfactants.

[0012] Furthermore, the nonionic surfactant is selected from one or more of secondary alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, isomeric alcohol ether polyoxyethylene ether, and fatty acid methyl ester ethoxylate.

[0013] Furthermore, the anionic surfactant is selected from one or more of alkyl sulfates, fatty alcohol polyoxyethylene sulfates, dodecylbenzene sulfonates, fatty acid methyl ester sulfonates, fatty alcohol polyoxyethylene carboxylates, α-olefin sulfonates, and fatty acid salts.

[0014] Furthermore, the solvent is selected from one or more of glycerol, propylene glycol, ethylene glycol, butylene glycol, and polyethylene glycol.

[0015] Furthermore, the neutralizing agent is selected from one or more of alcohol amine compounds and hydroxides.

[0016] Furthermore, the auxiliary agent is selected from one or more of flavors, preservatives, pigments, inorganic salts, enzyme preparations, anti-discoloration agents, and organic acids.

[0017] The present invention also provides a method for preparing the laundry beads with excellent stability, comprising the following steps:

[0018] S1. methyl oleate and a catalyst are mixed, heated under the protection of an inert gas, ethylene oxide is added, and the reaction is continued until the pressure is constant to obtain methyl oleate ethoxylate;

[0019] S2. The fatty alcohol polyoxyethylene ether and acrylic acid monomer are blended, a catalyst and an inhibitor are added, and the reaction is heated under the protection of an inert gas to obtain an acrylic acid-modified fatty alcohol polyoxyethylene ether;

[0020] S3. The acrylic acid-modified fatty alcohol polyoxyethylene ether was added to water, and an initiator, sodium p-styrene sulfonate and methyl oleate ethoxylate were added successively, mixed evenly, and heated to react to obtain a modified surfactant;

[0021] S4. Add the modified surfactant, anti-discoloration agent, solvent and nonionic surfactant to the container and stir evenly;

[0022] S5. Add a neutralizer, adjust the pH, add the remaining ingredients, stir evenly, filter, and package with a water-soluble film to obtain laundry beads with excellent stability.

[0023] Further, in step S1, the temperature of the heating reaction is 165-185°C;

[0024] Further, in step S2, the temperature of the heating reaction is 85-95°C;

[0025] Furthermore, in step S3, the temperature of the heating reaction is 70-85°C.

[0026] Furthermore, in step S2, the pH is 6-8.

[0027] Furthermore, the molar ratio of the acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 1:1-2:2-4.

[0028] Furthermore, in step S5, the thickness of the water-soluble film is 60-100 μm.

[0029] Furthermore, the anti-discoloration agent is selected from butylated hydroxytoluene.

[0030] Specifically, adding butylated hydroxytoluene to the laundry beads delays the oxidative degradation process of the fragrance ingredients, reduces the overall discoloration caused by fragrance aging from the source, and ensures the appearance stability of the product.

[0031] The present invention has the following beneficial effects:

[0032] In the laundry beads with excellent stability prepared by the present invention, modified surfactants are compounded with other ingredients such as surfactants, and the compatibility of multiple ingredients is good; first, acrylic acid is used to modify fatty alcohol polyoxyethylene ether, and acrylic acid segments with double bonds are introduced into fatty alcohol polyoxyethylene ether, and then methyl oleate is reacted with hexylene oxide, and methyl oleate is ethoxylated to obtain methyl oleate ethoxylate with unsaturated fatty acids, and then acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate are mixed, and free radical polymerization is carried out under the action of a catalyst and an inhibitor, thereby obtaining a modified surfactant with a polymer segment. The purpose of doing this is:

[0033] Firstly, since the modified surfactant contains a large number of ethoxy groups, it can work together with other ethoxy-containing surfactants to balance the irritation caused by the large amount of sulfonic acid, saturated fatty acid and other ingredients in the laundry beads formula, thereby improving the mildness of the laundry beads, reducing the residual irritation of clothes after washing, and effectively reducing irritation to the skin and clothing fibers; secondly, since the modified surfactant introduces a large number of methyl oleate ethoxylate chain segments, it also contains long hydrophobic chain segments and ethoxylated chain segments. The ethoxylated chain segments can increase the compatibility with the non-ionic surfactants in the formula; and the long hydrophobic chain segments are used to adjust the HLB value and promote physical entanglement with other ingredients. At the same time, since the sodium p-styrene sulfonate chain segments are introduced, it itself contains benzene rings and has a polarity similar to that of sulfonic acid, which can improve the compatibility with the anionic surfactants in the laundry beads components.

[0034] Therefore, the performance of the laundry beads can be made more stable at high and low temperatures, the solubilization capacity of the components can be improved, and the laundry beads containing a large amount of sulfonic acid and saturated fatty acids can be prevented from precipitating or stratifying under high and low temperature cycles, or placed in high and low temperature environments for a long time, and the overall stability of the laundry beads is effectively improved. In addition, the modified surfactant works together with other surfactants to improve the decontamination ability of the laundry beads; it can also encapsulate easily inactivated components such as enzyme preparations, so that the enzyme preparations can be stably present in the surfactant system, effectively improving the removal rate of protein stains by the laundry beads. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. Unless otherwise stated, the raw materials, reactions and post-treatment methods shown in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0036] The words "preferred", "preferably", "more preferably", etc. in the present invention refer to embodiments of the present invention that can provide certain beneficial effects in certain circumstances. However, other embodiments may also be preferred under the same circumstances or other circumstances. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not applicable, nor is it intended to exclude other embodiments from the scope of the present invention.

[0037] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers expressing, for example, the amounts of ingredients used in the specification and claims should be understood to be modified in all cases by the term "about". Therefore, unless indicated to the contrary, the numerical parameters set forth in the following specification and the appended claims are approximate values ​​that vary depending on the desired properties to be obtained by the present invention.

[0038] PEG200, polyethylene glycol, solvent, was purchased from Saudi Basic Industries Corporation.

[0039] Sulfonic acid, linear alkylbenzene sulfonic acid, carbon number is 10-14, anionic surfactant.

[0040] Secondary alcohol polyoxyethylene ether, secondary alcohol 1209, was purchased from Jiangsu Saike.

[0041] Enzyme preparations, protease, were purchased from Novozymes (China) Biotechnology Co., Ltd.

[0042] HEDP, hydroxyethylidene diphosphonic acid, a chelating agent.

[0043] Saturated fatty acid, KORTACID C71, was purchased from PACIFIC OLEO.

[0044] Monoethanolamine, neutralizing agent.

[0045] BHT, butylated hydroxytoluene, anti-tarnish agent.

[0046] Citric acid, an organic acid.

[0047] AAM05927 / 00, fragrance, purchased from Givaudan.

[0048] Plus Red, pigment.

[0049] Fatty alcohol polyoxyethylene ether, AEO, was purchased from Hebei Yongtai Chemical Group.

[0050] p-Toluenesulfonic acid, catalyst.

[0051] Hydroquinone, inhibitor.

[0052] The water-soluble film is a conventional commercial PVA film.

[0053] Example 1

[0054] A laundry condensate bead with excellent stability, the laundry condensate bead with excellent stability comprising the following components in mass fractions:

[0055]

[0056]

[0057] The method for preparing the laundry beads with excellent stability comprises the following steps:

[0058] S1. 10 g of methyl oleate was mixed with 0.2 g of sodium hydroxide, heated to 180 ° C under the protection of nitrogen, 10 g of ethylene oxide was added at 5000 r / min and 0.4 MPa pressure, and 22 g of ethylene oxide was added when the pressure dropped to 0.1 MPa, and the reaction was continued until the pressure was constant to obtain methyl oleate ethoxylate;

[0059] S2. 12 g of fatty alcohol polyoxyethylene ether and 1.6 g of acrylic acid were blended, and then 0.5 g of p-toluenesulfonic acid and 0.01 g of hydroquinone were added. The mixture was heated at 90 ° C for 7 h under the protection of nitrogen, washed, and recrystallized to obtain acrylic acid-modified fatty alcohol polyoxyethylene ether;

[0060] S3. Using deionized water as solvent, adjusting the pH of acrylic acid-modified fatty alcohol polyoxyethylene ether to 7 using 10wt% NaOH solution, adding sodium p-styrene sulfonate and methyl oleate ethoxylate (the molar ratio of acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 1:1:3), reacting at 75°C for 5h under the catalysis of ammonium persulfate (the amount is 1wt% of the total monomer mass), washing and drying to obtain a modified surfactant;

[0061] S4. According to the above mass fraction, add the modified surfactant, anti-discoloration agent, solvent and nonionic surfactant to the container and stir evenly;

[0062] S5. Add a neutralizer, adjust the pH, add the remaining ingredients, stir evenly, filter, and package with an 80 μm water-soluble film to obtain laundry beads with excellent stability.

[0063] Example 2

[0064] A laundry condensate bead with excellent stability, the laundry condensate bead with excellent stability comprising the following components in mass fractions:

[0065]

[0066] The method for preparing the laundry beads with excellent stability comprises the following steps:

[0067] S1. 10 g of methyl oleate was mixed with 0.2 g of sodium hydroxide, heated to 180 ° C under the protection of nitrogen, 10 g of ethylene oxide was added at 5000 r / min and 0.4 MPa pressure, and 22 g of ethylene oxide was added when the pressure dropped to 0.1 MPa, and the reaction was continued until the pressure was constant to obtain methyl oleate ethoxylate;

[0068] S2. 12 g of fatty alcohol polyoxyethylene ether and 1.6 g of acrylic acid were blended, and then 0.5 g of p-toluenesulfonic acid and 0.01 g of hydroquinone were added. The mixture was heated at 85 ° C for 8 h under nitrogen protection, washed, and recrystallized to obtain acrylic acid-modified fatty alcohol polyoxyethylene ether;

[0069] S3. Using deionized water as solvent, adjusting the pH of acrylic acid-modified fatty alcohol polyoxyethylene ether to 7 using 10wt% NaOH solution, adding sodium p-styrene sulfonate and methyl oleate ethoxylate (the molar ratio of acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 1:1:3), reacting at 75°C for 5h under the catalysis of ammonium persulfate (the amount is 1wt% of the total monomer mass), washing and drying to obtain a modified surfactant;

[0070] S4. According to the above mass fraction, add the modified surfactant, anti-discoloration agent, solvent and nonionic surfactant to the container and stir evenly;

[0071] S5. Add a neutralizer, adjust the pH, add the remaining ingredients, stir evenly, filter, and package with an 80 μm water-soluble film to obtain laundry beads with excellent stability.

[0072] Example 3

[0073] A laundry condensate bead with excellent stability, the laundry condensate bead with excellent stability comprising the following components in mass fractions:

[0074]

[0075] The method for preparing the laundry beads with excellent stability comprises the following steps:

[0076] S1. 10 g of methyl oleate was mixed with 0.2 g of sodium hydroxide, heated to 185 ° C under the protection of nitrogen, 10 g of ethylene oxide was added at 5000 r / min and 0.4 MPa pressure, and 22 g of ethylene oxide was added when the pressure dropped to 0.1 MPa, and the reaction was continued until the pressure was constant to obtain methyl oleate ethoxylate;

[0077] S2. 12 g of fatty alcohol polyoxyethylene ether and 1.6 g of acrylic acid were blended, and then 0.5 g of p-toluenesulfonic acid and 0.01 g of hydroquinone were added. The mixture was heated at 90 ° C for 7 h under the protection of nitrogen, washed, and recrystallized to obtain acrylic acid-modified fatty alcohol polyoxyethylene ether;

[0078] S3. Using deionized water as solvent, adjusting the pH of acrylic acid-modified fatty alcohol polyoxyethylene ether to 7 using 10wt% NaOH solution, adding sodium p-styrene sulfonate and methyl oleate ethoxylate (the molar ratio of acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 1:1:3), reacting at 75°C for 5h under the catalysis of ammonium persulfate (the amount is 1wt% of the total monomer mass), washing and drying to obtain a modified surfactant;

[0079] S4. According to the above mass fraction, add the modified surfactant, anti-discoloration agent, solvent and nonionic surfactant to the container and stir evenly;

[0080] S5. Add a neutralizer, adjust the pH, add the remaining ingredients, stir evenly, filter, and package with an 80 μm water-soluble film to obtain laundry beads with excellent stability.

[0081] Comparative Example 1

[0082] The difference between this comparative example and Example 1 is that step S1 is removed, methyl oleate ethoxylate is replaced with lauric acrylate of equal mass in step S3, and other components and preparation methods are the same.

[0083] Comparative Example 2

[0084] The difference between this comparative example and Example 1 is that in step S3, the molar ratio of the acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 0.5:1:0.5, and the other ingredients and preparation methods are the same.

[0085] Comparative Example 3

[0086] The difference between this comparative example and Example 1 is that step S1-3 is removed, and in step S4, the modified surfactant is replaced with AEO9 of equal mass, and the other components and preparation methods are the same.

[0087] Test Example 1

[0088] The laundry beads of Example 1 and Comparative Examples 1-3 were tested for stability performance.

[0089] Test method:

[0090] Low temperature stability test: The laundry beads of Example 1 and Comparative Examples 1-3 were placed in an environment with a temperature of -0±2°C for 2 months, and then taken out and observed immediately. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the low temperature stability was determined to be qualified.

[0091] Test of constant temperature and humidity stability: The laundry beads of Example 1 and Comparative Examples 1-3 were placed in an environment with a temperature of 37±2°C and a humidity of 75%. After being placed at the constant temperature for 2 months, the laundry beads were taken out and observed immediately. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the constant temperature and humidity stability was determined to be qualified.

[0092] Test of room temperature stability: The laundry beads of Example 1 and Comparative Examples 1-3 were placed in an environment at a temperature of 25±2°C for 2 months, and then taken out and observed immediately. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the room temperature stability was determined to be qualified.

[0093] High temperature stability test: The laundry beads of Example 1 and Comparative Examples 1-3 were placed in a 45±2°C environment for 2 months, and then taken out and observed immediately. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the high temperature stability was determined to be qualified.

[0094] Test of freeze-thaw cycle stability: The laundry beads of Example 1 and Comparative Examples 1-3 were placed at -15°C for 24 hours, taken out and placed at room temperature for 24 hours, and the cycle was repeated 4 times. The appearance was observed after each cycle. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the freeze-thaw cycle stability was determined to be qualified.

[0095] Test of the stability of cold and hot cycles: The laundry beads of Example 1 and Comparative Examples 1-3 were placed at -15-20°C for 24 hours, taken out and placed at 45±1°C for 24 hours, and the cycle was repeated 4 times. The appearance was observed after each cycle. If there was no obvious discoloration, stratification or precipitation of the laundry beads, the freeze-thaw cycle stability was determined to be qualified.

[0096] The results are shown in Table 1.

[0097] Table 1 Stability test results of laundry beads of Example 1 and Comparative Examples 1-3

[0098]

[0099] As can be seen from Table 1, the laundry beads prepared in Example 1 and Comparative Examples 1-3 all passed the stability test after being placed at different temperatures for two months; in the stability tests of freeze-thaw cycles and hot and cold cycles, the laundry beads of Comparative Examples 1-3 all showed stratification.

[0100] Test Example 2

[0101] The detergent performance of the laundry beads of Example 1 and Comparative Examples 1-3 was tested.

[0102] The stain removal test method is: refer to "GB / T 13174 2008 Determination of stain removal power and cyclic washing performance of detergents for clothing" for stain removal test.

[0103] The results are shown in Table 2, where P represents the decontamination ratio. Generally, a standard laundry detergent is used as a reference sample, and its decontamination ratio is set to 1.00. The higher the P value, the better the cleaning power.

[0104] Table 2 Decontamination performance test results of laundry beads of Example 1 and Comparative Examples 1-3

[0105]

[0106] As can be seen from Table 2, the laundry detergent beads of Example 1 are significantly better than those of Comparative Examples 1-3 and standard laundry detergent in removing carbon black, protein and sebum.

[0107] Test Example 3

[0108] The mildness test was performed on the laundry beads of Example 1 and Comparative Examples 1-3.

[0109] Test method: Add 10g of laundry beads into a drum washing machine and wash cotton clothes separately using the standard washing program. After washing, have 10 testers wear the clothes for one day and evaluate the irritation of the cotton clothes. The test score is 1-5 points. The higher the score, the milder the product.

[0110] The test results are shown in Table 3.

[0111] Table 3 Mildness test results of laundry beads of Example 1 and Comparative Examples 1-3

[0112] Cotton clothes National standard laundry detergent 3 Example 1 4.5 Comparative Example 1 3.5 Comparative Example 2 3.5 Comparative Example 3 4

[0113] As shown in Table 3, the mildness of Example 1 is significantly better than that of Comparative Examples 1-3 and national standard laundry detergent; because a modified surfactant is added in Example 1, the mildness of the laundry beads is improved, and the residual irritation of the clothes after washing is reduced.

[0114] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0115] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A laundry condensate bead with excellent stability, characterized in that: The laundry beads with excellent stability include the following components by mass fraction: The modified surfactant is obtained by reacting acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate.

2. The laundry condensate beads with excellent stability according to claim 1, characterized in that: The surfactant is selected from one or more of anionic surfactants, nonionic surfactants and zwitterionic surfactants.

3. The laundry condensate beads with excellent stability according to claim 2, characterized in that: The nonionic surfactant is selected from one or more of secondary alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, isomeric alcohol ether polyoxyethylene ether, and fatty acid methyl ester ethoxylate.

4. The laundry condensate beads with excellent stability according to claim 2, characterized in that: The anionic surfactant is selected from one or more of alkyl sulfates, fatty alcohol polyoxyethylene sulfates, dodecylbenzene sulfonates, fatty acid methyl ester sulfonates, fatty alcohol polyoxyethylene carboxylates, α-olefin sulfonates, and fatty acid salts.

5. The laundry detergent beads with excellent stability according to claim 1, characterized in that: The solvent is selected from one or more of glycerol, propylene glycol, ethylene glycol, butylene glycol, and polyethylene glycol.

6. The laundry detergent beads with excellent stability according to claim 1, characterized in that: The neutralizing agent is selected from one or more of alcohol amine compounds and hydroxides.

7. The laundry detergent beads with excellent stability according to claim 1, characterized in that: The auxiliary agent is selected from one or more of flavors, preservatives, pigments, inorganic salts, enzyme preparations, anti-discoloration agents, and organic acids.

8. The method for preparing the laundry beads with excellent stability according to any one of claims 1 to 7, characterized in that: The steps include: S1. methyl oleate and a catalyst are mixed, heated under the protection of an inert gas, ethylene oxide is added, and the reaction is continued until the pressure is constant to obtain methyl oleate ethoxylate; S2. The fatty alcohol polyoxyethylene ether and acrylic acid monomer are blended, a catalyst and an inhibitor are added, and the reaction is heated under the protection of an inert gas to obtain an acrylic acid-modified fatty alcohol polyoxyethylene ether; S3. The acrylic acid-modified fatty alcohol polyoxyethylene ether was added to water, and an initiator, sodium p-styrene sulfonate and methyl oleate ethoxylate were added successively, mixed evenly, and heated to react to obtain a modified surfactant; S4. Add the modified surfactant, anti-discoloration agent, solvent and nonionic surfactant to the container and stir evenly; S5. Add a neutralizer, adjust the pH, add the remaining ingredients, stir evenly, filter, and package with a water-soluble film to obtain laundry beads with excellent stability.

9. The method for preparing laundry beads with excellent stability according to claim 8, characterized in that: In step S1, the temperature of the heating reaction is 165-185°C; In step S2, the temperature of the heating reaction is 85-95°C; In step S3, the temperature of the heating reaction is 70-85°C.

10. The method for preparing laundry beads with excellent stability according to claim 8, characterized in that: In step S3, the molar ratio of the acrylic acid-modified fatty alcohol polyoxyethylene ether, sodium p-styrene sulfonate and methyl oleate ethoxylate is 1:1-2:2-4.

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