Clothing detergent composition with strong redeposition resistance and preparation method thereof

Abstract

The invention discloses a clothing detergent composition with strong redeposition resistance and a preparation method of the clothing detergent composition. Comprising the following components in percentage by mass: 1%-5% of an anti-redeposition agent, 0.5%-3% of a plant-based surfactant, 7%-15% of an anionic surfactant, 5%-10% of a nonionic surfactant, 0.1%-1% of a chelating agent, 0.1%-0.5% of a bactericide, 0.1%-1% of an enzyme preparation, 0.1%-3% of other additives and the balance of deionized water, and the condition of dirt redeposition in the washing process of the clothes can be obviously reduced, so that the washed clothes are white and clean, the color is brighter, and the overall washing quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a laundry detergent composition with strong anti-redeposition and a preparation method thereof. BACKGROUND

[0002] In daily life, clothes are prone to be stained with various dirt such as sweat stains, dust, oil stains, etc. The general detergent on the market can strip off part of the dirt when washing, but the dirt particles are prone to redeposit on the fibers of the clothes, resulting in the clothes turning gray and yellow after washing, affecting the cleaning effect and service life. Moreover, the general detergent lacks specificity for the characteristics of the material of the clothes and the type of dirt, and the washing efficiency is not high, and the effect is quite different in different washing environments. Therefore, it is of great significance to develop a laundry detergent composition with strong anti-redeposition. SUMMARY

[0003] In view of the shortcomings of the prior art, the first object of the present application is to provide a laundry detergent composition containing an anti-redeposition agent, which can effectively prevent dirt from redepositing during cleaning, improve washing effect, and effectively improve cleaning effect in combination with various surfactants and enzyme preparations.

[0004] A laundry detergent composition with strong anti-redeposition comprises the following components in mass percentage: 1-5% anti-redeposition agent, 0.5-3% plant-based surfactant, 7-15% anionic surfactant, 5-10% non-ionic surfactant, 0.1-1% chelating agent, 0.1-0.5% bactericide, 0.1-1% enzyme preparation, 0.1-3% other additives, and the balance is deionized water.

[0005] As a further improvement of the present application, the anti-redeposition agent is one or more of acrylic acid and sodium hydroxide salt copolymer, modified cellulose copolymer, polyether copolymer, and polyvinylpyrrolidone copolymer; the mass ratio of low molecular weight, medium molecular weight, and high molecular weight in the above copolymers is 2-3:4-6:2-3, the molecular weight of the low molecular weight is 2000-3000 Da, the molecular weight of the medium molecular weight is 3000-4000 Da, and the molecular weight of the high molecular weight is 4000-5000 Da.

[0006] As a further improvement of the present application, the plant surfactant is one or more of tea seed oil acid, coconut oil acid, and alkyl glycoside.

[0007] As a further improvement of the present application, the anionic surfactant is one or more of sodium dodecyl sulfate, fatty alcohol polyoxyethylene ether sodium sulfate, and olefin sulfonate.

[0008] As a further improvement of the present application, the non-ionic surfactant is one or several of fatty alcohol polyoxyethylene ether, coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether.

[0009] As a further improvement of the present application, the chelating agent is one or several of EDTA-2Na, sodium citrate, HEDP.

[0010] As a further improvement of the present application, the bactericide is one or several of silver ion bactericide, dichlorisobutyl, trichloroisobutyl.

[0011] As a further improvement of the present application, the enzyme preparation is one or several of protease, cellulase, lipase.

[0012] As a further improvement of the present application, the other additives are one or several of essence, pigment, pH regulator.

[0013] In view of the deficiencies of the prior art, a second object of the present application is to provide a preparation method of a laundry detergent composition with strong anti-redeposition, comprising the following steps:

[0014] Step one, add deionized water and anionic surfactant to the reaction kettle, start stirring, and stir until the liquid is transparent;

[0015] Step two, add non-ionic surfactant and plant-based surfactant to the reaction kettle, and stir until completely dissolved;

[0016] Step three, add chelating agent to the reaction kettle, and stir until completely dissolved;

[0017] Step four, add anti-redeposition agent to the reaction kettle, and stir until completely dissolved;

[0018] Step five, add pH regulator and adjust the pH to 7-8.3;

[0019] Step six, add bactericide, enzyme preparation, and other additives to the reaction kettle, and stir until completely uniform;

[0020] Step seven, sample and detect the physicochemical indexes of the material, and obtain the laundry detergent composition if qualified.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. The anti-redeposition agent in the laundry detergent composition of the present invention can significantly reduce the redeposition of dirt on clothes during the washing process, making clothes whiter, cleaner, and more vibrant in color after washing, thus improving the overall washing quality. At the same time, it reduces the friction and adhesion of dirt particles to clothing fibers, reducing fiber damage, extending the lifespan of clothes, and making them more durable. Furthermore, tests have shown that it maintains good anti-redeposition effects under different water temperatures and quality conditions, whether machine washed or hand washed, adapting to various washing environments.

[0023] 2. Anti-redeposition agents, combined with various surfactants and enzymes, can achieve excellent decontamination effects and improve cleaning efficiency. Detailed Implementation

[0024] The following examples further illustrate the features of the present invention and other related features in detail, so as to facilitate understanding by those skilled in the art.

[0025] An embodiment of the present invention provides a laundry detergent composition with strong anti-redeposition properties, comprising the following raw materials by mass percentage: 1%–5% anti-redeposition agent, 0.5%–3% plant-based surfactant, 7%–15% anionic surfactant, 5%–10% nonionic surfactant, 0.1%–1% chelating agent, 0.1%–0.5% bactericide, 0.1%–1% enzyme preparation, 0.1%–3% other additives, and the balance being deionized water.

[0026] In some embodiments, the anti-redeposition agent is one or more of an acrylic acid and sodium hydroxide copolymer, a modified cellulose copolymer, a polyether copolymer, and a polyvinylpyrrolidone copolymer.

[0027] The copolymer of acrylic acid and sodium hydroxide is sodium polyacrylate, which contains a large number of carboxyl anionic polar groups (-COO) in its molecule. - This can improve the water solubility of sodium polyacrylate, and at the same time, the polymer chain of sodium polyacrylate will pass through -COO - It adsorbs onto the surface of tiny scale particles, giving the scale particles a uniform negative charge. When scale particles with the same negative charge pass through, an electrostatic repulsive force is generated between them, preventing them from colliding with each other and agglomerating into larger particles, thereby achieving an anti-redeposition effect.

[0028] Polyether copolymers have a large molecular weight, which can adsorb tiny scale particles through intermolecular forces. At the same time, they have hydrophilic ether bonds, which make the scale particles suspend in water and prevent them from coming into contact with clothing again, thus achieving an anti-redeposition effect.

[0029] The modified cellulose copolymer can be sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl trimethyl ammonium chloride cellulose and other modified water-soluble cellulose copolymers, which can be adsorbed on the micro-scale dirt by electrostatic action and / or intermolecular force. The modified cellulose copolymer has a large molecular volume and a large steric hindrance, which can prevent the aggregation of the adsorbed micro-scale dirt.

[0030] In some embodiments, the mass ratio of low polymer molecules: medium polymer molecules: high polymer molecules in the anti-redeposition agent is 2:4:2, 2:4:3, 2:5:3, 2:5:2, 3:6:2 or 3:6:3.

[0031] The low polymer molecules have a molecular weight of 2000-3000 Da, which is smaller than that of the medium / high polymer molecules. The low polymer molecules have weaker adsorption capacity and anti-redeposition capacity than the medium / high polymer molecules, but have good water solubility, which can improve the overall water solubility of the anti-redeposition agent.

[0032] The high polymer molecules have a molecular weight of 4000-5000 Da, which is larger than that of the low polymer molecules. The high polymer molecules can be adsorbed on the micro-scale dirt and have a large steric hindrance to prevent the aggregation and sedimentation of the particles, but have weaker water solubility than the low polymer molecules.

[0033] The medium polymer molecules have a molecular weight of 3000-4000 Da, which is between that of the low polymer molecules and the high polymer molecules. The medium polymer molecules have anti-redeposition capacity and water solubility between those of the low polymer molecules and the high polymer molecules.

[0034] The mass ratio of low polymer molecules: medium polymer molecules: high polymer molecules in the anti-redeposition agent is 2-3:4-6:2-3, which can ensure that the anti-redeposition agent has good water solubility and anti-redeposition capacity at low or high temperatures.

[0035] In some embodiments, the plant surfactant factor is one or more of tea seed oil acid, coconut oil acid and alkyl glycoside, which has the advantages of low irritation, good biodegradability and green environmental protection. The mass fraction of the plant surfactant factor can be 0.5%, 0.7%, 0.9%, 1.1%, 1.3%, 1.5%, 1.7%, 1.9%, 2.1%, 2.3%, 2.5%, 2.7% or 3%.

[0036] In some embodiments, the anionic surfactant is one or more of sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate and olefin sulfonate, which has strong detergency and can quickly penetrate into the fiber gap of the clothes to strip polar dirt. The anionic surfactant can also electrostatically repel the negatively charged copolymer in the anti-redeposition agent, further promoting the anti-redeposition effect of the cleaning agent. The mass fraction of the anionic surfactant can be 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15% or the like.

[0037] In some embodiments, the non-ionic surfactant is one or more of fatty alcohol polyoxyethylene ether, coconut oil fatty acid diethanolamide, nonylphenol polyoxyethylene ether, which has strong emulsifying ability and is suitable for removing non-polar dirt on clothes, such as carbon black, oil stains, etc. The mass fraction of the non-ionic surfactant can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, etc.

[0038] In some embodiments, the chelating agent is one or more of EDTA-2Na, sodium citrate, HEDP, which can chelate calcium and magnesium ions in water, soften water quality, avoid the reaction of hard water with surfactants to generate precipitates attached to clothes, and improve the overall adaptability of the cleaning agent to different water quality. The mass fraction of the chelating agent can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%.

[0039] In some embodiments, the bactericide is one or more of silver ion bactericide, dichloris, triclosan, which can quickly kill bacteria during washing, and has long-term antibacterial effect after washing. The mass fraction of the bactericide can be 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%.

[0040] In some embodiments, the enzyme preparation is one or more of protease, cellulase, lipase, which can decompose corresponding organic stains. The mass fraction of the enzyme preparation can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%. Less than 0.1% has poor enzymatic effect.

[0041] In some embodiments, the other additives are one or more of fragrances, pigments, pH regulators. The pH regulator is used to adjust the pH of the cleaning agent to a weak alkaline range of 7-8.3, in which the activity of the surfactant and enzyme preparation is best, while avoiding damage to the fibers of the clothes in strong alkaline conditions. The pH regulator can be citric acid or lye.

[0042] The embodiment of the present application provides a preparation method of a clothes cleaning agent composition with strong anti-redeposition, which comprises the following steps:

[0043] Step one, adding deionized water and anionic surfactant into a reaction kettle, and starting stirring until the liquid is transparent;

[0044] Step two, adding non-ionic surfactant into the reaction kettle and stirring until completely dissolved;

[0045] Step three, adding chelating agent into the reaction kettle and stirring until completely dissolved;

[0046] Step four, add anti-redeposition agent into the reactor, stir until completely dissolved;

[0047] Step five, add pH regulator, adjust pH to 7-8.3;

[0048] Step six, add bactericide, enzyme preparation, other additives into the reactor, stir until completely uniform;

[0049] Step seven, sample and test the physicochemical indexes of the material, and obtain the laundry detergent composition.

[0050] Examples 1-8 and Comparative Examples 1-3 were prepared according to the preparation method described above by changing the raw material formula according to Tables 1-2.

[0051] In the formula, liquid caustic is a 20% by mass NaOH solution. The acrylic acid and sodium hydroxide salt copolymer has a molecular weight of 2000-3000 Da for the low molecular weight component, 3000-4000 Da for the medium molecular weight component, and 4000-5000 Da for the high molecular weight component. The modified cellulose copolymer is carboxymethyl cellulose with a molecular weight of 2000-3000 Da. The polyvinylpyrrolidone copolymer has a molecular weight of 4000-5000 Da. The polyether copolymer is a propylene oxide and ethylene oxide copolymer with a molecular weight of 2000-4000 Da.

[0052] The standard laundry detergent refers to a laundry detergent configured according to the requirements of GB / T 1224-2012 for detergency, pH value, stability, and other indicators. The standard laundry detergent includes the following raw materials by mass: 12% polyethoxylated fatty alcohol (average EO addition number is 9), 8% triethanolamine, 0.5% sodium citrate, pH regulator, and the balance is deionized water. The pH regulator is used to adjust the pH of the standard laundry detergent to 8.5-9.0. The effective ingredient of the standard laundry detergent is ≥15.

[0053] Table 1 is the formula of the cleaning agent composition of Examples 1-8

[0054]

[0055]

[0056] Table 2 is the formula of the cleaning agent composition of Comparative Examples 1-3

[0057]

[0058]

[0059] Performance test

[0060] 1. Stain-removing power test: Referring to GB / T13174–2021 standard, JB-01 carbon black oil-stained cloth, JB-02 protein-stained cloth, and JB-03 sebum-stained cloth were each machine-washed in 1L of 250ppm ordinary hard water, and then air-dried. The detergent dosage was 0.2% of the washing water. Calculation: Stain-removing power ratio = (m0 - m1) / m 标 m 标 The difference in mass between the standard soiled cloth and the standard cloth before and after washing with standard laundry detergent is represented by m0, where m0 is the mass of the standard soiled cloth before washing.

[0061] 2. Anti-redeposition test: Apply 1cm of the coating to a pure white fabric with a whiteness of 93-95. 2 Carbon black oil stains, 1cm 2 After 2 hours, wash the fabric with a brown sugar solution containing 1% detergent, then air dry. Repeat the above steps 20 times on the original stain location and test the whiteness. (Light source color temperature: 3500K~4500K, light intensity: 1000lx~15000lx) Anti-redeposition performance score calculation: Whiteness of the fabric stain / Original whiteness of the fabric.

[0062] Table 3 shows the test results of Examples 1-8 and Comparative Examples 1-3.

[0063]

[0064] (1) As can be seen from Table 3, the stain removal ratio of the detergents in Examples 1 to 8 is higher than that of the standard laundry detergent. This is because the present invention uses a combination of various surfactants, anti-redeposition agents, chelating agents and enzyme preparations to make the detergent composition have good cleaning power for all kinds of stains.

[0065] Anionic surfactants, such as sodium dodecylbenzenesulfonate and sodium fatty alcohol ether sulfate, can quickly penetrate to the interface between stains and the substrate, reducing surface tension to remove oily stains such as grease and sebum. Nonionic surfactants, such as fatty alcohol polyoxyethylene ethers, can enhance the emulsification ability of protein and starch stains, while improving low-temperature solubility. The combination of both can cover both polar and nonpolar stains, avoiding the problem of insufficient cleaning power for specific stains by a single surfactant. Anti-redeposition agents can prevent the re-adsorption of detached stain particles, such as dust and pigments, onto the fibers, indirectly improving the final cleaning effect. Chelating agents can bind with calcium and magnesium ions in water, softening the water and preventing the reaction of metal ions with surfactants to form insoluble precipitates, such as soap scum, ensuring that the surfactant remains in a highly active state, especially in hard water environments where it can significantly maintain the stability of cleaning power. Enzyme preparations specifically remove large-molecule stains such as proteins, starches, and cellulose into smaller, easily soluble molecules, which are then completely removed in conjunction with surfactants, thus filling the gap in the ability of traditional chemical cleaners to remove biological stains.

[0066] (2) From the comparison between Example 1 and Comparative Example 1, it can be seen that the anti-redeposition ability score of the cleaning agent without the addition of the anti-redeposition agent is low, i.e. the whiteness of the clothes after multiple washes is reduced, because the anti-redeposition agent can avoid the re-adsorption of the peeled-off stain particles, such as dust and pigment substances, to the fibers, thereby avoiding the greying or staining of the clothes, and the soil removal ratio score of the cleaning agent without the addition of the anti-redeposition agent is also low, indicating that the anti-redeposition agent indirectly affects the soil removal of the cleaning agent.

[0067] (3) From the comparison between Example 1 and Examples 5-8, it can be seen that within a certain range, the anti-redeposition ability of the cleaning agent is improved with the increase of the amount of the anti-redeposition agent, and when the amount of the anti-redeposition agent exceeds a certain range, the improvement of the anti-redeposition ability is no longer obvious.

[0068] (4) From the comparison between Examples 1-4 and Comparative Examples 2-3, it can be seen that the anti-redeposition abilities of the cleaning agents are different, which is related to the types or molecular weight distribution of the anti-redeposition agents. Among them, the anti-redeposition effect of the acrylic acid and sodium hydroxide salt copolymer is the best.

[0069] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields by using the content of the present application is also included in the patent protection scope of the present application.

Claims

1. A laundry detergent composition having strong anti-redeposition, characterized in that, It comprises the following components by mass percentage: 1% to 5% anti-redeposition agent, 0.5% to 3% plant-based surfactant, 7% to 15% anionic surfactant, 5% to 10% non-ionic surfactant, 0.1% to 1% chelating agent, 0.1% to 0.5% bactericide, 0.1% to 1% enzyme preparation, 0.1% to 3% other additives, and the balance is deionized water.

2. The laundry detergent composition having strong anti-redeposition according to claim 1, wherein, The anti-redeposition agent is one or more of acrylic acid and sodium hydroxide salt copolymer, modified cellulose copolymer, polyether copolymer, and polyvinylpyrrolidone copolymer; in the above copolymers, the low polymerization molecule: medium polymerization molecule: high polymerization molecule is 2 to 3: 4 to 6: 2 to 3, the molecular weight of the low polymerization molecule is 2000 to 3000 Da, the molecular weight of the medium polymerization molecule is 3000 to 4000 Da, and the molecular weight of the high polymerization molecule is 4000 to 5000 Da.

3. The laundry detergent composition having strong anti-redeposition according to claim 1, wherein, The plant surfactant factor is one or more of tea seed oil acid, coconut oil acid, and alkyl glycoside.

4. The laundry detergent composition according to Claim 1, wherein, The anionic surfactant is one or more of sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, and olefin sulfonate.

5. The laundry detergent composition according to Claim 1, wherein, The non-ionic surfactant is one or more of fatty alcohol polyoxyethylene ether, coconut oil fatty acid diethanolamide, and nonylphenol polyoxyethylene ether.

6. The laundry detergent composition with strong anti-redeposition according to claim 1 The object is characterized by, The chelating agent is one or more of EDTA-2Na, sodium citrate, and HEDP.

7. The laundry detergent composition with strong anti-redeposition according to claim 1 The bactericide is one or more of silver ion bactericide, dichloris, and triclosan. The object is characterized by, 8. The laundry detergent composition with strong anti-redeposition according to claim 1 The enzyme preparation is one or more of protease, cellulase, and lipase.

9. The laundry detergent composition with strong anti-redeposition according to claim 1 The object is characterized by, The other additives are one or more of essence, pigment, and pH regulator. It comprises the following steps: Step one, add deionized water and anionic surfactant to the reaction kettle, start stirring, and stir until the liquid is transparent; The object is characterized by, Step two, add non-ionic surfactant and plant-based surfactant to the reaction kettle, and stir until completely dissolved; Step three, add chelating agent to the reaction kettle, and stir until completely dissolved; 10. A process for preparing the laundry detergent composition according to claims 1 to 9, characterized in that, Step four, add anti-redeposition agent to the reaction kettle, and stir until completely dissolved; Step five, add pH regulator, and adjust the pH to 7 to 8.3; Step six, add bactericide, enzyme preparation, and other additives to the reaction kettle, and stir until completely uniform; Step seven, take a sample to detect the physical and chemical indicators of the material, and if it is qualified, the laundry detergent composition is obtained. ​ ​ ​ ​

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