Detergent composition with good color stability and application

Abstract

The invention belongs to the technical field of detergents, and discloses a detergent composition with good color stability and application. The detergent composition provided by the invention comprises the following components in parts by weight: 0.1-20 parts of fatty acid amide propyl dimethyl tertiary amine; 0.1-20 parts of fatty acid and / or alkyl benzene sulfonic acid; 0-20 parts of other sulfonate or sulfate anionic surfactants; 15 to 35 parts of a nonionic surfactant; 15-30 parts of an organic solvent; and 0.1-10 parts of an auxiliary agent. According to the invention, the color change reaction of the coagulation beads can be effectively delayed, and the appearance yellowing of the coagulation beads can be obviously improved; and the gel bead product has better storage stability and detergency, so that the dosage of the polyoxyethylene ether sulfate surfactant in the composition can be increased, and the detergency performance of the laundry gel bead product is further improved.

Description

Technical Field

[0001] This invention relates to the field of detergent technology, and more specifically to a detergent composition with good color stability and its application. Background Technology

[0002] Laundry detergent pods are a new type of laundry product made by encapsulating laundry detergent in a water-soluble film. Because the water-soluble film in the pods is stable in low-water environments and softens and dissolves in high-water environments, the water content of commercially available laundry detergent pods is generally controlled within a low range of 8-15%. This low water content limits the amount of certain inorganic salts and ionic surfactants that can be added to the formula.

[0003] On the other hand, while water-soluble gel beads can isolate surfactants and some solvents, they are permeable to small molecules such as water, oxygen, electrolytes, and propylene glycol. Therefore, gel beads are not only susceptible to weight loss or gain due to environmental factors during storage, but they are also prone to discoloration, especially at high temperatures. This is primarily because many existing gel beads use monoethanolamine (MEA) or triethanolamine (TEA) as neutralizing agents for acidic raw materials.

[0004] In existing technologies, the following solutions are mainly used to suppress yellowing of gel beads. For example, invention patent CN115975739 B adds reducing substances such as sulfites to the gel bead formulation. However, the gel bead film is permeable, easily causing recrystallization of salts on the surface, resulting in seepage and affecting the appearance of the gel bead product. Invention patent CN 112812897A uses inorganic alkali instead of organic amine neutralizers, which can improve the yellowing problem, but requires strict control of the mass ratio of alkylbenzene sulfonate to other anionic surfactants in the composition, which may affect the product's detergency. Invention patent CN 118725996 A uses a special short-chain organic amine as a neutralizer, which can improve the color change and salt precipitation of the gel beads. However, the special short-chain organic amine may be less commonly used in domestic industry and may require special customization. Furthermore, because of its low molecular weight and strong alkalinity, the short-chain organic amine usually has strong skin irritation, and its safety is currently unknown, thus posing potential safety hazards.

[0005] It is evident that finding neutralizing agents other than short-chain organic amines such as MEA and TEA that have stable color is one of the feasible and effective ways to solve the discoloration phenomenon of granules. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a detergent composition and its application with good color stability.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a detergent composition comprising the following components in parts by weight: Fatty acid propyl dimethyl tertiary amine 0.1~20 parts; The chemical formula of the fatty acid amide propyl dimethyl tertiary amine is: R-CONH-CH2CH2CH2N(CH3)2; Wherein, R is a straight-chain or partially branched, saturated or partially unsaturated alkyl group of C7~C21. Fatty acids and / or alkylbenzene sulfonic acid 0.1 to 20 parts; Other sulfonate or sulfate anionic surfactants: 0-20 parts; 15-35 parts of nonionic surfactant; 15-30 parts organic solvent; Additives: 0.1-10 parts.

[0008] This invention uses organic amines as neutralizing agents for fatty acids and / or alkylbenzene sulfonic acids, effectively delaying the discoloration reaction without the need for additional reducing agents, thus significantly improving the yellowing appearance of the laundry pods. It overcomes the problem that the addition of small-molecule organic amines (such as monoethanolamine) can cause a Schiff base reaction with aldehydes in the detergent composition or polyethylene water-soluble film, leading to discoloration. Simultaneously, the polymorphic ionic surfactant system formed by the organic amine neutralizing agent and sulfonic acid or fatty acids in this invention exhibits good anionic compatibility and higher inorganic salt solubilization ability under the specific framework of a weak acid with solvent, thus giving the laundry pods better storage stability and detergency. This allows for an increase in the amount of polyoxyethylene ether sulfate surfactants in the composition, further enhancing the detergency of the laundry pods.

[0009] In a preferred embodiment of the detergent composition of the present invention, the structural formula of the fatty acid amide propyl dimethyl tertiary amine is: ; Wherein, R is a straight-chain or partially branched, saturated or partially unsaturated alkyl group of C7 to C21.

[0010] As a preferred embodiment of the detergent composition of the present invention, it includes 0.1 to 15 parts of the fatty acid amide propyl dimethyl tertiary amine.

[0011] In a preferred embodiment of the detergent composition of the present invention, the molar ratio of the fatty acid propyl dimethyl tertiary amine to the fatty acid and / or alkylbenzene sulfonic acid is (0.8~1.5):1; Preferably, the molar ratio of the fatty acid propyl dimethyl tertiary amine to the fatty acid and / or alkylbenzene sulfonic acid is (0.869~1.111): 1; More preferably, the molar ratio of the fatty acid propyl dimethyl tertiary amine to the fatty acid and / or alkylbenzene sulfonic acid is 1:1.

[0012] In a preferred embodiment of the detergent composition of the present invention, the other sulfonate or sulfate anionic surfactant is selected from at least one of C8 to C18 alkyl sulfates, C8 to C18 ethoxylated fatty alcohol sulfates, C10 to C18 alkenyl sulfonates, modified oleic acid ethoxylated sulfonates, and C8 to C18 alkyl sulfonates.

[0013] In a preferred embodiment of the detergent composition of the present invention, the nonionic surfactant is selected from at least one of fatty alcohol alkoxylates, alkyl polysaccharides, fatty acid ester alkoxylates, modified oil ethoxylates, fatty acid alkyl alcohol amides, fatty acid methyl ester ethoxylates, and polyether surfactants.

[0014] In a preferred embodiment of the detergent composition of the present invention, the organic solvent is at least one selected from propylene glycol, glycerin, sorbitol, and polyethylene glycol.

[0015] In a preferred embodiment of the detergent composition of the present invention, the adjuvant is selected from at least one of chelating agents, enzyme preparations, preservatives, polymers, suspending agents, antibacterial agents, colorants, and fragrances.

[0016] In a preferred embodiment of the detergent composition of the present invention, the pH of the detergent composition is 5.5 to 7.5.

[0017] Preferably, the pH of the detergent composition is in the weakly acidic pH range of 6.0 to 7.0.

[0018] In a second aspect, the present invention provides a laundry detergent pod, characterized in that it comprises the detergent composition described in the first aspect.

[0019] In a preferred embodiment of the laundry detergent pods of the present invention, the detergent composition is encapsulated by a water-soluble film.

[0020] As a further preferred embodiment of the laundry detergent pods of the present invention, the water-soluble film is at least one of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer.

[0021] As a further preferred embodiment of the laundry detergent pods of the present invention, the polyvinyl alcohol homopolymer is a hydrolysis product of a vinyl acetate homopolymer; the polyvinyl alcohol copolymer is a hydrolysis product of a copolymer of vinyl acetate and a second monomer; the second monomer is selected from at least one of acrylic acid, acrylates, methacrylic acid, and methacrylates.

[0022] Thirdly, the present invention applies the detergent composition described in the first aspect to washing products.

[0023] Preferably, the washing product includes laundry detergent pods and laundry liquid; the laundry liquid includes concentrated laundry liquid.

[0024] Fourthly, the present invention applies the detergent composition described in the first aspect and the laundry pods described in the second aspect to improve the color stability of washing products.

[0025] Fifthly, the present invention provides a method for improving the color stability of a detergent, using a detergent comprising the detergent composition described in the first aspect or the laundry pods described in the second aspect.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention introduces a long-chain amide tertiary amine as a neutralizing agent into the laundry detergent pod formulation. This neutralizes conventional alkylbenzene sulfonic acids, fatty acids, etc., forming a unique pseudo-gemini surfactant system. Under a specific structure containing weak acids and solvents, this system exhibits good anionic compatibility and higher inorganic salt solubilization ability, thus giving the pod products superior storage stability and detergency. Furthermore, fatty amide propyl dimethyl tertiary amine is one of the most inexpensive and readily available tertiary amines currently mass-produced in industry. It has been widely used in the daily chemical industry as a fine chemical intermediate, emulsifier, or cosmetic raw material, and is cost-effective. From a molecular structure perspective, due to its large molecular weight, fatty amide propyl dimethyl tertiary amine has lower basicity and amine value, resulting in a lower relative neutralization efficiency than short-chain organic amine products, but it also has relatively lower skin irritation. Simultaneously, the pseudo-ionic surfactant formed by the association of the long-chain tertiary amine with a single-chain acid surfactant creates a unique double-chain structure similar to that of a gemini surfactant.

[0027] 2. The composition of this invention exhibits excellent color stability. After neutralization, the long-chain amamidopropyl tertiary amine has a lower amine value compared to traditional short-chain organic amines such as MEA and TEA, and its reactivity with oxygen is weaker. Furthermore, the oxidation products (such as commercially available amide oxides) are lighter in color. Therefore, without the need for additional reducing agents, the color change problem of laundry detergent pods after aging can be effectively improved.

[0028] 3. Compared with the previously disclosed method of using short-chain organic amines as neutralizing agents, the composition of the present invention has lower acute skin irritation and is more suitable for use in daily chemical detergent products. Attached Figure Description

[0029] Figure 1 The images show a comparison of the appearance of laundry detergent pods made from Example 3 (left) and Comparative Example 1 (right) after one month of high-temperature testing. Figure 2 The images show a comparison of the appearance of laundry detergent pods packaged in Example 3 (left) and Comparative Example 1 (right) after being left exposed for 3 months. Detailed Implementation

[0030] This invention provides a detergent composition with good color stability, comprising the following weight percentages: (1) 0.1%~20% of fatty acid amide propyl dimethyl tertiary amine, wherein the fatty acid amide propyl dimethyl tertiary amine has the following structural formula: ; The chemical formula is: R-CONH-CH2CH2CH2N(CH3)2; Wherein, R is a straight-chain or partially branched, saturated or partially unsaturated alkyl group of C7~C21. (2) 0.1%~20% fatty acids and / or alkylbenzene sulfonic acids; (3) 0-20% other sulfonate or sulfate anionic surfactants; (4) 15%~35% nonionic surfactant; (5) 15%~30% organic solvent; (6) 0.1%~10% additives; (7) The remainder is deionized water.

[0031] The liquid washing composition described in this invention refers to a detergent composition in a liquid state. This composition can be encapsulated with a water-soluble film to form laundry pods. After being diluted in a certain proportion, the liquid washing composition can be directly applied to the substrate (i.e., fabric products, hard surfaces, etc.) to remove stains and achieve the purpose of cleaning the substrate surface. The liquid washing composition may also generally contain solvents, surfactant systems, and other common detergent additives such as viscosity modifiers, enzymes, fragrances, etc. In this document, liquid washing compositions are not distinguished from detergent compositions.

[0032] In some embodiments, long-chain fatty acid amide propyl dimethyl tertiary amine is used as a neutralizing agent for fatty acids and / or alkylbenzene sulfonic acids, with a neutralization molar ratio (tertiary amine: fatty acid / sulfonic acid) of (0.869~1.111):1, preferably 1:1. By adjusting the neutralization molar ratio of the acid and the tertiary amine, the pH of the detergent composition can be made in the range of 5.5 to 7.5, preferably a weakly acidic pH range of 6.0 to 7.0.

[0033] In some embodiments, the other sulfonate or sulfate surfactant is selected from one or more of C8 to C18 alkyl sulfates, C8 to C18 ethoxylated fatty alcohol sulfates, C10 to C18 alkenyl sulfonates, and C8 to C18 alkyl sulfonates.

[0034] In some embodiments, the nonionic surfactant is selected from one or more of fatty alcohol alkoxylates, alkyl polysaccharides, fatty acid ester alkoxylates, modified oil ethoxylates, fatty acid alkylolamides, fatty acid methyl ester ethoxylates, and polyether surfactants.

[0035] In some embodiments, the organic solvent is one or more of propylene glycol, glycerol, sorbitol, and polyethylene glycol.

[0036] In some embodiments, the adjuvant is selected from at least one or more of chelating agents, enzyme preparations, preservatives, polymers, suspending agents, antibacterial agents, colorants, and fragrances.

[0037] The present invention also provides a laundry detergent pod, comprising a water-soluble film encapsulating the above-mentioned liquid detergent composition.

[0038] The laundry detergent pods of this invention comprise a water-soluble film that encapsulates a liquid detergent composition within at least one compartment. Multi-compartment laundry detergent pods can separate chemically incompatible components or allow for the earlier or later release of desired components.

[0039] In some embodiments, the laundry detergent pods disclosed in this invention include at least one sealed cavity. Therefore, the laundry detergent pods may include a single cavity or multiple cavities. In embodiments including multiple cavities, each cavity may contain the same and / or different compositions. The compositions may then take any suitable form, including but not limited to liquids, solids, and combinations thereof (e.g., solids suspended in a liquid). The cavities of multi-cavity pods may have the same or different sizes and / or volumes.

[0040] In some embodiments, the laundry pods of the present invention can be processed using three methods: vertical filling, horizontal filling, and roller filling. Roller filling is preferred due to its highest production efficiency and ability to support continuous production. Each row of rollers can contain multiple mold cavities of the same shape, and the mold is designed with a radius of curvature of 9.525 mm between the bottom inner wall and the side walls. This radius of curvature allows the mold to impart rounded corners to the film package, thereby forming a generally rectangular package shape and a rounded transition to the bottom film surface. Holes are provided along the bottom surface for the cavities to allow vacuum to be drawn from the film and the film to be pulled into the mold.

[0041] In some implementations, the bottom film is heated by heating rollers or infrared light before vacuuming to soften the water-soluble film, facilitating the subsequent vacuuming process. The heating temperature is between 60°C and 90°C. Vacuuming requires a negative pressure ranging from approximately 100 MPa to 600 MPa for about 0.5 to 1.5 seconds, ensuring the bottom film fully adheres to the bottom surface of the mold. The top film then passes through a wetting roller; the wetting agent can be water, a film composition, or a plasticizer. Controlling the rotation speed of the wetting roller is crucial, as it affects the water coverage and subsequent sealing strength. Appropriate pressure is applied to the sealing area to seal the upper and lower films, forming a complete, closed cavity. Finally, a cutting tool is used to cut the film edges to prepare unit-dose products.

[0042] The water-soluble membrane described in this invention is obtained by preparing a water-soluble polymer from monomers and then using a membrane-forming device. The water-soluble polymer refers to one or more mixtures of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer. The terms "water-soluble membrane" and "water-soluble film" are not distinguished in this invention. The thickness of the water-soluble membrane is 65-90 micrometers.

[0043] The polyvinyl alcohol homopolymer described in this invention is a hydrolysis product of vinyl acetate homopolymer, and the polyvinyl alcohol copolymer is a hydrolysis product of a copolymer of vinyl acetate and a second monomer. The second monomer is selected from one or more of acrylic acid, acrylates, methacrylic acid, and methacrylates. The polyvinyl alcohol homopolymer or copolymer refers to a hydrolysis product of a vinyl acetate homopolymer or copolymer, with a degree of hydrolysis of 86% to 99%. The test method for the degree of hydrolysis is described in detail in GB / T12010.2-2010 Plastics Polyvinyl Alcohol Materials (PVAL) Part 2: Performance Determination. In this standard, the degree of hydrolysis is referred to as the degree of alcoholysis, and the two have the same meaning.

[0044] To better illustrate the objectives, technical solutions, and advantages of this invention, the invention will be further described below with reference to specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0045] Unless otherwise specified, the experimental methods used in the examples are conventional methods; the materials and reagents used are commercially available unless otherwise specified.

[0046] The method for detecting the storage stability of the liquid detergent composition in the embodiments includes: High temperature stability: After the composition is bottled and sealed, it is placed in an environment of 45℃±1℃ and kept at a constant temperature for 4 weeks. After being restored to room temperature of 25℃±5℃, the composition shows no stratification, precipitation, or discoloration, which indicates that the high temperature stability is qualified. Low-temperature stability: After the composition is bottled and sealed, it is placed in an environment of 0℃±2℃ for 4 weeks. After that, it is taken out and observed immediately. If the composition does not separate into layers or precipitate, it is considered to have passed the low-temperature stability test. Freeze-thaw cycle stability: After being placed in an environment of -15℃ to 20℃ for 24 hours, the mixture was removed and then placed in an environment of room temperature (25℃ ± 5℃) for another 24 hours, constituting one cycle. This was repeated four times, with the composition observed after each cycle. The composition is considered to have passed the freeze-thaw cycle stability test if no stratification or precipitation occurs. Room temperature stability: After the composition is bottled and sealed, and placed in a room temperature environment (20℃~30℃) for 4 weeks, if the composition does not separate into layers or precipitate, it is considered to have qualified room temperature stability.

[0047] The method for detecting the storage stability of laundry detergent pods in this embodiment includes: High temperature and high humidity stability: The laundry detergent pods were sealed in a capped PE bottle and stored at 45±1℃ and 70%~80% relative humidity for 8 weeks. Then, they were removed from the constant temperature and humidity chamber and tested for color change, extracellular precipitation, and solubility. The water solubility of the pods was determined according to QB / T 5658. High-temperature precipitation stability: The laundry detergent pods were placed open in a constant temperature forced-air drying oven at 45±1℃ for 2 weeks. If no particles or powder were precipitated inside or outside the membrane and there was no leakage, the high-temperature precipitation stability was qualified. Long-term open-air stability: Laundry detergent pods are left exposed and laid flat in an environment with a room temperature of 20℃~30℃ and a relative humidity of 40%~60%. After 3 months, if no stratification, gelation, or precipitation occurs inside or outside the membrane, the long-term open-air stability is qualified.

[0048] In this embodiment, the acute skin irritation test was conducted in accordance with the "Cosmetic Safety Technical Specifications". The sample was sent to a third-party testing institution for acute skin irritation testing, and the test concentration was the undiluted solution.

[0049] The method for testing the dissolution performance of laundry detergent pods in this embodiment is as follows: The solubility performance involved in this invention refers to the solubility of laundry detergent pods in 1 liter of water. One laundry detergent pod is placed in a beaker, and after stirring and dissolving for a period of time, stirring is stopped. Immediately, all the solution and residue in the beaker are filtered through a 60-mesh sieve. The solubility performance is then evaluated sensorily based on the residue remaining on the sieve within one minute.

[0050] The raw materials used in the following embodiments and comparative examples are described below, but are not limited to these materials: Laurylamidopropyl dimethylamine (PKO-12), purchased from Zanyu Technology Co., Ltd., with a molecular weight of approximately 284; Cocamidopropyl dimethylamine (PKO-C), purchased from Zanyu Technology Co., Ltd., has a molecular weight of approximately 312. Oleamide propyl dimethylamine (PKO-O), purchased from Zanyu Technology Co., Ltd., with a molecular weight of approximately 366; Coconut oil fatty acids (DC1218) were purchased from Wilmar Oils & Fats Technology Co., Ltd., with an average molecular weight of approximately 200 based on C12. Dodecylbenzenesulfonic acid, purchased from Zanyu Technology Co., Ltd., with an average molecular weight of approximately 326; Sodium fatty alcohol polyoxyethylene ether sulfate (AES), purchased from Zanyu Technology Co., Ltd. Modified grease ethoxylate sodium sulfonate (SNS-80) was purchased from China National Light Industry Chemical Co., Ltd. Fatty alcohol polyoxyethylene ether-9 (AEO-9) was purchased from Zhejiang Yugao Chemical Co., Ltd. The isomeric C10 alcohol alkoxylate (Lutensol XL80) was purchased from BASF. Isomer of C13 alcohol ethoxylate (Lutensol TO7), purchased from BASF; Modified oleic acid ethoxylate (SOE-N-60) was purchased from China National Light Industry Chemical Co., Ltd. 2-Amino-2-methyl-propanol (isobutanolamine), purchased from Shanghai Maclean Biochemical Technology Co., Ltd.; Polyethyleneimine ethoxylate (HP20) was purchased from BASF. Unless otherwise specified, all raw materials are industrial grade.

[0051] In the table, " / " indicates a dosage of 0; the dosages of each raw material are mass fractions and have been purified.

[0052] The compositional components of the detergent compositions of Examples 1-4 and Comparative Examples 1-2 are shown in Table 1.

[0053] Table 1. Composition of the detergent composition (parts by mass) Note: The organic amine neutralizers in Table 1 are used to neutralize acidic raw materials to a pH of approximately 7.0.

[0054] The storage stability tests of Examples 1-4 and Comparative Examples 1-2 are shown in Table 2.

[0055] Table 2 Storage stability test results As shown in Table 2, the detergent compositions and laundry pods of Examples 1-4 exhibit good storage stability. This indicates that although long-chain amamidopropyl tertiary amines have lower neutralization efficiency compared to short-chain amines such as MEA, the unique structural characteristics of the pod products—containing solvent and low water content—result in a double-chain hydrophobic pseudo-polymeric ionic structure consistent with that of short-chain amines, thus also exhibiting good stability. Comparing the stability results of Example 3 with Comparative Examples 1 and 2 reveals that Comparative Example 1, which traditionally uses MEA as an organic amine neutralizer, shows severe discoloration at high temperatures, while Comparative Example 2 and Example 3 of this invention, which use special organic amines as neutralizers, show less discoloration than Comparative Example 1.

[0056] Furthermore, comparing the irritation test results of Example 3 and Comparative Examples 1 and 2, Comparative Examples 1 and 2 showed mild irritation, while Example 3 showed no irritation. The neutralization scheme of the present invention exhibits even lower irritation. This is because isobutanolamine and monoethanolamine are both short-chain tertiary amines, which are relatively strong in basicity. Within a similar pH range, the trace amounts of free amines present have a stronger irritant effect on the skin and mucous membranes compared to long-chain tertiary amines. Therefore, the method of using long-chain amide tertiary amines as neutralizing agents in the present invention is more suitable for application in daily chemical personal care products that come into contact with human skin.

[0057] Figure 1 and Figure 2 The images show the high-temperature test and the appearance of the laundry pods made from the detergent compositions of Example 3 and Comparative Example 1 after being exposed to room temperature. It can be clearly seen that Comparative Example 1 underwent severe discoloration after high temperature, and there was precipitation on the film surface, making it impossible to see the numbers in the background. In addition, Comparative Example 1 also showed obvious gelation during long-term exposure to room temperature, which greatly affected the aesthetic appearance.

[0058] The compositional components of the detergent compositions of Examples 5-7 and Comparative Examples 3-4 are shown in Table 3.

[0059] Table 3. Components of the Detergent Composition Table 3, using cocamidopropyl dimethyl tertiary amine (PKO-C) as an example, shows that changes in the neutralization ratio of the tertiary amine with the acidic raw materials in the composition directly affect the pH value of the composition. After the composition of the present invention is encapsulated into beads, the water solubility of the sample may be affected by changes in the degree of hydrolysis of the water-soluble membrane during high-temperature aging. Comparing the test results of Examples 5-7 and Comparative Examples 3 and 4, it can be found that when the neutralization ratio is too low, the pH value of the composition is too low, and the water solubility of the aging beads is significantly worse; while when the neutralization ratio is too high, the excess tertiary amine of the present invention has limited solubility in the system, resulting in turbidity. Therefore, the suitable neutralization molar ratio is in the range of 0.9-1.05, preferably around 1:1. At this ratio, the water solubility of the composition is in the weakly acidic range of around 6.0-7.0, and the resulting beads have good high-temperature water solubility.

[0060] The detergent compositions of Examples 1 to 7 were tested for detergency according to GB13174, with a test concentration of 0.5 g / L. The results are detailed in Table 4.

[0061] Table 4 Results of National Standard Determination Power Test As can be seen from the detergency test results in Table 4, the detergent compositions of Examples 1 to 7 provided by the present invention not only have long-term storage stability, but also have good washing and detergency performance, and all of them can pass the detergency test.

[0062] The neutralizing agent used in this invention can also be extended to amide tertiary amines with similar carbon chains or other carbon chain mixtures, and the nonionic or anionic surfactant used can also be extended to other varieties commonly found in the field.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A detergent composition, characterized in that, The components include the following parts by weight: Fatty acid propyl dimethyl tertiary amine 0.1~20 parts; The chemical formula of the fatty acid amide propyl dimethyl tertiary amine is: R-CONH-CH2CH2CH2N(CH3)2; Wherein, R is a straight-chain or partially branched, saturated or partially unsaturated alkyl group of C7~C21. Fatty acids and / or alkylbenzene sulfonic acid 0.1 to 20 parts; Other sulfonate or sulfate anionic surfactants: 0-20 parts; 15-35 parts of nonionic surfactant; 15-30 parts organic solvent; Additives: 0.1-10 parts.

2. The detergent composition according to claim 1, characterized in that, The molar ratio of the fatty acid propyl dimethyl tertiary amine to the fatty acid and / or alkylbenzene sulfonic acid is (0.8~1.5):

1.

3. The detergent composition according to claim 1, characterized in that, The other sulfonate or sulfate anionic surfactants are selected from at least one of C8 to C18 alkyl sulfates, C8 to C18 ethoxylated fatty alcohol sulfates, C10 to C18 alkenyl sulfonates, modified oil ethoxylated sulfonates, and C8 to C18 alkyl sulfonates.

4. The detergent composition according to claim 1, characterized in that, The nonionic surfactant is selected from at least one of fatty alcohol alkoxylates, alkyl polysaccharides, fatty acid ester alkoxylates, modified oil ethoxylates, fatty acid alkylolamides, fatty acid methyl ester ethoxylates, and polyether surfactants.

5. The detergent composition according to claim 1, characterized in that, The organic solvent is at least one of propylene glycol, glycerin, sorbitol, and polyethylene glycol.

6. The detergent composition according to claim 1, characterized in that, The adjuvant is selected from at least one of chelating agents, enzyme preparations, preservatives, polymers, suspending agents, antibacterial agents, colorants, and fragrances.

7. The detergent composition according to claim 1, characterized in that, The pH of the detergent composition is 5.5 to 7.

5.

8. A laundry detergent pod, characterized in that, Includes the detergent composition according to any one of claims 1 to 7.

9. The laundry detergent pods according to claim 8, characterized in that, The detergent composition is encapsulated by a water-soluble film.

10. The laundry detergent pod according to claim 9, characterized in that, The water-soluble film is at least one of polyvinyl alcohol homopolymer and polyvinyl alcohol copolymer.

11. The laundry detergent pods according to claim 10, characterized in that, The polyvinyl alcohol homopolymer is a hydrolysis product of vinyl acetate homopolymer; the polyvinyl alcohol copolymer is a hydrolysis product of a copolymer of vinyl acetate and a second monomer; the second monomer is selected from at least one of acrylic acid, acrylates, methacrylic acid, and methacrylates.

12. The use of the detergent composition according to any one of claims 1 to 7 in a washing product.

13. The use of the detergent composition according to any one of claims 1 to 7 and the laundry pods according to any one of claims 8 to 11 in improving the color stability of washing products.

14. A method for improving the color stability of detergents, characterized in that, A detergent comprising any of the detergent compositions according to claims 1 to 7 or any of the laundry pods according to claims 8 to 11 is used.

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