A concentrated detergent and its preparation method and application

Abstract

The application provides a concentrated detergent and a preparation method and application thereof, the concentrated detergent comprises anionic surfactant 1-20 parts, non-ionic surfactant 20-45 parts, softening agent 0.01-10 parts, washing aid 0.1-15 parts, deionized water by weight fraction. The concentrated detergent provided by the application can not only have good decontamination capacity, but also has the functional effects of making clothes soft, lasting fragrance and the like through the cooperation of non-ionic surfactant, anionic surfactant, softening agent and washing aid. In addition, the concentrated detergent provided by the application also has the advantages of convenient use and small dosage.

Description

Technical Field

[0001] This invention belongs to the field of detergent technology, specifically relating to a concentrated detergent, its preparation method, and its application. Background Technology

[0002] With the development of the times, household detergents have evolved from traditional solid laundry powder to liquid laundry detergent. Liquid detergent (laundry detergent) has been one of the fastest-growing detergent varieties in the domestic and international fabric care market in recent years. Compared with traditional laundry powder, laundry detergent has advantages such as being neutral and mild, gentle on clothes, and non-irritating to the skin. Replacing laundry powder and soap with laundry detergent can reduce environmental pollution.

[0003] CN105754737A discloses a concentrated laundry detergent for water-soluble film packaging and its preparation method. The concentrated laundry detergent's raw materials include: methyl ester ethoxylate, sodium fatty alcohol polyoxyethylene (2) ether sulfate, nonionic surfactant, 1,2-benzisothiazolin-3-one, glycerol, polyethylene glycol, propylene carbonate, and fragrance. The concentrated laundry detergent produced by this formulation method does not damage the water-soluble film, has good water solubility, low foaming, and is easy to rinse; it is highly concentrated, with its effective components being 4-5 times that of ordinary laundry detergent; and it is simple to produce, requiring no heating during the preparation process.

[0004] CN110157551A discloses a highly concentrated laundry detergent, comprising: an environmentally friendly solvent, sodium alkyl alcohol polyether sulfate, C12-13 alkyl alcohol polyether, C12-14 olefin sulfonate, and water. This highly concentrated laundry detergent has an active ingredient content of 60%, is easy to produce and can be industrialized, is non-toxic to aquatic organisms, is environmentally safe, and responds to national calls for environmental protection and energy conservation. This concentrated laundry detergent has advantages such as easy dispersibility and dissolution, short action time, convenient use, small dosage, low irritation, strong detergency, and no harm to the human body; it is suitable for widespread use in civilian and public places.

[0005] However, most of the aforementioned laundry detergents primarily use anionic and nonionic surfactants. As washing machines are used more frequently and efficiently each year, fabrics are subjected to strong mechanical forces, causing surface fibers to curl and clump due to abrasion. Using anionic and nonionic surfactants can create a harsh, rough feel, lacking effective conditioning properties. After multiple washes, the appearance and color of clothes gradually deteriorate, becoming grayish and dull. Therefore, there is an urgent need to develop a concentrated laundry detergent that can maintain its cleaning power and transparency while ensuring softening effects to meet these application requirements. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a concentrated detergent, its preparation method and application.

[0007] To achieve this objective, the present invention employs the following technical solution:

[0008] In a first aspect, the present invention provides a concentrated detergent, which comprises, by weight, 1-20 parts of anionic surfactant, 20-45 parts of nonionic surfactant, 0.01-10 parts of fabric softener, 0.1-15 parts of detergent additive, and deionized water.

[0009] The concentrated detergent provided by this invention significantly improves the overall detergency of the detergent through the synergistic effect of anionic and nonionic surfactants. The synergistic effect of the fabric softener and detergent additives achieves the effects of protecting clothes and colors, leaving clothes soft and smooth after washing. The concentrated detergent of this invention, through the combination of nonionic surfactants, anionic surfactants, fabric softeners, and detergent additives, not only possesses good detergency but also has functional effects such as softening clothes and leaving a lasting fragrance. Furthermore, the concentrated detergent of this invention also has the advantages of being easy to use and requiring only a small amount.

[0010] The amount of anionic surfactant added in the concentrated detergent of the present invention can be 2 parts, 4 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts or 18 parts, etc.

[0011] The amount of the nonionic surfactant added can be 22 parts, 25 parts, 27 parts, 29 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts, or 44 parts, etc.

[0012] The amount of fabric softener added can be 0.05 parts, 0.1 parts, 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, or 9 parts, etc.;

[0013] The amount of the detergent additive can be 0.2 parts, 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, or 14 parts, etc.

[0014] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0015] Preferably, the anionic surfactant comprises any one or a combination of at least two of the following: sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, alkylbenzene sulfonic acid, potassium coconut oil oleate, sodium xylene sulfonate, and disodium lauryl ether sulfosuccinate.

[0016] Preferably, the anionic surfactant is a combination of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, and disodium lauryl ether sulfosuccinate.

[0017] Preferably, the mass ratio of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, and disodium lauryl ether sulfosuccinate is 1:(2-4):(0.1-1).

[0018] Where “2-4” can be 2.2, 2.5, 2.6, 2.8, 3, 3.2, 3.4, 3.5, 3.6 or 3.8, etc.;

[0019] "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0020] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0021] In this invention, the anionic surfactant is a combination of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, and disodium lauryl ether sulfosuccinate. Sodium fatty alcohol polyoxyethylene ether sulfate is readily soluble in water and possesses excellent detergency, emulsification, foaming properties, and hard water resistance, with a gentle washing effect that does not damage the skin. Sodium α-alkenyl sulfonate exhibits good foam stability and hard water resistance. Disodium lauryl ether sulfosuccinate has excellent detergency, foams rapidly, and remains transparent at low temperatures. The synergistic effect of these three surfactants significantly improves the product's emulsification, foaming, and dispersion properties, resulting in better detergency and lower irritation.

[0022] Preferably, the non-surfactant includes any one or a combination of at least two of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9, isomeric octane polyoxyethylene propylene ether, alkyl glycoside, and isomeric alcohol polyoxyethylene ether.

[0023] Preferably, the nonionic surfactant is a combination of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9, and isomeric octane polyoxyethylene propylene ether.

[0024] Preferably, the mass ratio of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9 and isomeric octane polyoxyethylene propylene ether is 1:(1-2.5):(0.1-1).

[0025] "1-2.5" can be 1.2, 1.5, 1.7, 1.9, 2, 2.2 or 2.4, etc.

[0026] "0.1-1" can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.9, etc.

[0027] In this invention, the nonionic surfactant is a combination of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9, and isomeric octane polyoxyethylene propylene ether. The three work synergistically to give the product the advantages of excellent foaming performance, outstanding detergency, good biodegradability, and gentle and low irritation to the skin.

[0028] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0029] Preferably, the fabric softener comprises any one or a combination of at least two of the following: hydrophilic cationic copolymer, hydrolyzed wheat protein / silicone copolymer, diamide quaternary ammonium salt, silicone-modified fabric softener, polyethylene glycol laurate, and silicone fabric softener.

[0030] Preferably, the hydrophilic cationic copolymer is Noverite from Lubrizol. TM 301 polymer.

[0031] Preferably, the organosilicon-modified fabric softener is from Guangzhou Zhonghaojing Polymer Materials Co., Ltd. S50.

[0032] Preferably, the fabric softener is a combination of a hydrophilic cationic copolymer, an organosilicon-modified fabric softener, and polyethylene glycol laurate.

[0033] Preferably, the mass ratio of the hydrophilic cationic copolymer, the silicone-modified softener, and the polyethylene glycol laurate is 1:(0.5-2):(0.1-1.5).

[0034] "0.5-2" can be 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.7 or 1.9, etc.

[0035] "0.1-1.5" can be 0.2, 0.4, 0.5, 0.7, 0.9, 1, 1.2 or 1.4, etc.

[0036] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0037] In this invention, the polyethylene glycol laurate has good water solubility, emulsification, and thermal stability. As a major component of oiling agents for chemical fibers, especially polyester staple fibers, it not only imparts good smoothness and antistatic properties to the fibers but also improves their hand feel. The hydrophilic cationic copolymer has excellent affinity for fibers and can form a hydrophilic surface on the clothing surface, making stains easier to remove. The silicone-modified fabric softener has excellent softening effects on fabrics and can prevent fabric shrinkage and improve fabric comfort during the washing process. The fabric softener of this invention uses the above three components in combination to better improve the cleaning and stain removal performance of the detergent.

[0038] Preferably, the detergent additive includes any one or a combination of at least two of the following: enzyme preparations, anti-redeposition agents, citric acid, or organic solvents.

[0039] Preferably, the anti-redeposition agent comprises any one or a combination of at least two of polyethyleneimine ethoxylate, sodium polyacrylate, or acrylic maleic acid copolymer.

[0040] Preferably, the polyethyleneimine ethoxylate is BASF Sokalan HP 20.

[0041] Preferably, the sodium polyacrylate is Dow Acusol 445N.

[0042] Preferably, the acrylic-maleic copolymer is BASF Sokalan CP 88.

[0043] Preferably, the organic solvent includes any one or a combination of at least two of ethanol, propylene glycol, isohexyl glycol, and diethylene glycol butyl ether.

[0044] Preferably, the organic solvent is isohexyl glycol.

[0045] In this invention, by adding an organic solvent to concentrated detergents, the dissolution of anionic and nonionic surfactants can be accelerated, thereby preventing gelation of the detergent. Isohexanediol is preferred as the organic solvent. Isohexanediol is colorless and odorless, completely miscible with water, and possesses strong moisturizing, penetrating, and oil-dissolving abilities. Adding isohexanediol enhances the detergent's detergency and maintains a good balance between evaporation and absorption, ensuring that the product does not separate due to surface moisture evaporation during long-term storage. This solves the problem of highly concentrated laundry products, due to their high active ingredient content, easily separating their contents during storage and use due to surface moisture evaporation.

[0046] Preferably, the enzyme preparation comprises any one or a combination of at least two of the following: protease, cellulase, amylase, lipase, pectinase, or mannanase.

[0047] Preferably, the enzyme preparation is a combination of protease, lipase and amylase.

[0048] The protease can further hydrolyze protein stains that are difficult to break down, making them easier to clean. The lipase can catalyze the decomposition of fats into easily soluble fatty acids and glycerol. The amylase can quickly decompose starch stains into soluble maltose and dextrin, ensuring the cleaning effect. The enzyme preparation of this invention is composed of amylase, lipase and protease, which effectively improves the cleaning performance of highly concentrated laundry detergent. It can better remove difficult stains such as blood stains, protein, butter, juice, and chocolate stains from fabrics. During the washing process, while quickly cleaning stains, it also makes the fabric smoother and shinier.

[0049] Preferably, the concentrated detergent further includes any one or a combination of at least two of the following: fragrance, pH adjuster, or preservative.

[0050] Preferably, the amount of the fragrance added is 0.1-1 parts, for example, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts or 0.9 parts, etc.

[0051] Preferably, the fragrance agent includes a flavoring.

[0052] Preferably, the amount of preservative added is 0.1-0.5 parts, for example, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts or 0.5 parts, etc.

[0053] Preferably, the preservative includes phenoxyethanol and / or sodium benzoate.

[0054] Preferably, the amount of pH adjuster added is 0.1-2 parts, for example, 0.5 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts or 1.8 parts, etc.

[0055] Preferably, the pH adjuster comprises sodium hydroxide.

[0056] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0057] In a second aspect, the present invention provides a method for preparing a concentrated detergent as described in the first aspect, the method comprising mixing an anionic surfactant, a nonionic surfactant, a fabric softener, a detergent additive and deionized water in formulated amounts to obtain the concentrated detergent.

[0058] Preferably, the preparation method includes:

[0059] (1) Stir the fabric softener and enzyme preparation evenly in deionized water, heat the mixture, and then add anionic surfactant and nonionic surfactant to obtain mixture A.

[0060] (2) Cool the mixture A obtained in step (1), add citric acid, preservative, anti-redeposition agent, organic solvent and fragrance in sequence and stir evenly. Then add pH adjuster to adjust pH and let stand to obtain the concentrated detergent.

[0061] Preferably, the temperature rise to 40-60°C in step (1) can be, for example, 41°C, 43°C, 45°C, 47°C, 50°C, 52°C, 54°C, 56°C, or 58°C.

[0062] Preferably, the temperature drop to 25-35℃ in step (2) can be, for example, 26℃, 27℃, 28℃, 29℃, 30℃, 31℃, 32℃, 33℃ or 34℃.

[0063] Preferably, step (2) involves adjusting the pH to 7-9, for example, the pH can be 7, 7.5, 8, 8.5 or 9, etc.

[0064] All the specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0065] Thirdly, the present invention provides the application of a concentrated detergent as described in the first aspect in fabric cleaning.

[0066] Compared with the prior art, the present invention has the following beneficial effects:

[0067] (1) The concentrated detergent of the present invention, through the combination of nonionic surfactant, anionic surfactant, fabric softener and detergent additive, can not only have good stain removal ability, but also have the functional effects of making clothes soft and leaving a lasting fragrance.

[0068] (2) The concentrated detergent provided by the present invention can achieve excellent cleaning effect with a small amount during the washing process, and has good water solubility, which reduces the user's usage cost. Detailed Implementation

[0069] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0070] The following are some of the material and grade information involved in the embodiments and comparative examples:

[0071]

[0072] All other raw materials can be used as long as they are purchased from authorized distributors.

[0073] Example 1

[0074] This embodiment provides a concentrated detergent, which, by weight, comprises 3 parts of sodium lauryl ether sulfate (AES), 9 parts of sodium α-olefin sulfonate (AOS), 3 parts of disodium lauryl ether sulfosuccinate (MES), 10 parts of fatty alcohol polyoxyethylene ether (AEO-7), 15 parts of fatty alcohol polyoxyethylene ether (AEO-9), 5 parts of isomeric octacarbon polyoxyethylene propylene ether (CA-60), 0.5 parts of amylase, 0.5 parts of protease, 0.5 parts of lipase, 6.8 parts of isohexyl glycol, 1.5 parts of anti-redeposition agent, 0.2 parts of citric acid, and a hydrophilic cationic copolymer (Noverite). TM 2 parts of 301 polymer, silicone-modified fabric softener 2 parts of S50, 1 part of polyethylene glycol laurate (DM-6812), 0.5 parts of fragrance, and 0.5 parts of preservative (GlydantPlus). TM Add 0.2 parts of liquid and replenish with deionized water to 100 parts.

[0075] The concentrated detergent is prepared as follows:

[0076] (1) Stir the fabric softener and enzyme preparation evenly in deionized water, heat to 50°C, and then add anionic surfactant and nonionic surfactant to obtain mixture A.

[0077] (2) Cool the mixture A obtained in step (1) to 30°C, add citric acid, preservative, anti-redeposition agent, organic solvent and fragrance in sequence and stir evenly, then add pH adjuster to adjust pH to 8.0, and let stand to obtain the concentrated detergent.

[0078] Example 2

[0079] This embodiment provides a concentrated detergent, which, by weight, comprises 5 parts of sodium lauryl ether sulfate (AES), 10 parts of sodium α-olefin sulfonate (AOS), 3 parts of disodium lauryl ether sulfosuccinate (MES), 8 parts of fatty alcohol polyoxyethylene ether (AEO-7), 9.6 parts of fatty alcohol polyoxyethylene ether (AEO-9), 8 parts of isomeric octacarbon polyoxyethylene propylene ether (CA-60), 0.3 parts of amylase, 0.4 parts of protease, 0.5 parts of lipase, 4.8 parts of isohexyl glycol, 1.2 parts of anti-redeposition agent, 0.2 parts of citric acid, and a hydrophilic cationic copolymer (Noverite). TM 3 parts of 301 polymer, silicone-modified fabric softener ( S50) 1.5 parts, polyethylene glycol laurate (DM-6812) 4.5 parts, fragrance 0.5 parts, preservative (Glydant Plus) TM Add 0.2 parts of liquid and replenish with deionized water to 100 parts.

[0080] The concentrated detergent is prepared as follows:

[0081] (1) Stir the fabric softener and enzyme preparation evenly in deionized water, heat to 60°C, and then add anionic surfactant and nonionic surfactant to obtain mixture A.

[0082] (2) Cool the mixture A obtained in step (1) to 35°C, add citric acid, preservative, anti-redeposition agent, organic solvent and fragrance in sequence and stir evenly, then add pH adjuster to adjust pH to 7.5, and let stand to obtain the concentrated detergent.

[0083] Example 3

[0084] This embodiment provides a concentrated detergent, which, by weight, comprises 2 parts of sodium lauryl ether sulfate (AES), 7 parts of sodium α-olefin sulfonate (AOS), 1 part of disodium lauryl ether sulfosuccinate (MES), 9.4 parts of fatty alcohol polyoxyethylene ether (AEO-7), 23.5 parts of fatty alcohol polyoxyethylene ether (AEO-9), 1.6 parts of isomeric octacarbon polyoxyethylene propylene ether (CA-60), 0.6 parts of amylase, 0.5 parts of protease, 0.6 parts of lipase, 9 parts of isohexyl glycol, 1.2 parts of anti-redeposition agent, 0.1 parts of citric acid, and a hydrophilic cationic copolymer (Noverite). TM 1 part of 301 polymer, silicone-modified fabric softener ( S50) 1.5 parts, polyethylene glycol laurate (DM-6812) 1 part, fragrance 0.5 parts, preservative (GlydantPlus) TM Add 0.2 parts of liquid and replenish with deionized water to 100 parts.

[0085] The concentrated detergent is prepared as follows:

[0086] (1) Stir the fabric softener and enzyme preparation evenly in deionized water, heat to 45°C, and then add anionic surfactant and nonionic surfactant to obtain mixture A.

[0087] (2) Cool the mixture A obtained in step (1) to 25°C, add citric acid, preservative, anti-redeposition agent, organic solvent and fragrance in sequence and stir evenly. Then add pH adjuster to adjust pH to 8.5 and let stand to obtain the concentrated detergent.

[0088] Example 4

[0089] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the anionic surfactant does not include disodium lauryl ether sulfosuccinate, and the reduced amount of disodium lauryl ether sulfosuccinate is proportionally allocated to sodium fatty alcohol polyoxyethylene ether sulfate and sodium α-alkenyl sulfonate. The remaining components and amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0090] Example 5

[0091] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the anionic surfactant does not include sodium fatty alcohol polyoxyethylene ether sulfate, and the reduced amount of sodium fatty alcohol polyoxyethylene ether sulfate is proportionally allocated to disodium lauryl ether sulfosuccinate and sodium α-alkenyl sulfonate. The remaining components and their amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0092] Example 6

[0093] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the anionic surfactant does not include sodium α-alkenyl sulfonate, and the reduced amount of sodium α-alkenyl sulfonate is proportionally allocated to sodium fatty alcohol polyoxyethylene ether sulfate and disodium lauryl ether sulfosuccinate. The remaining components and amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0094] Example 7

[0095] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the nonionic surfactant does not include AEO-7, and the reduced amount of AEO-7 is proportionally allocated to AEO-9 and isomeric octacarbon polyoxyethylene propylene ether. The remaining components and amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0096] Example 8

[0097] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and that in Example 1 is that the nonionic surfactant does not include AEO-9, and the reduced amount of AEO-9 is proportionally allocated to AEO-7 and isomeric octane polyoxyethylene propylene ether. The remaining components and amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0098] Example 9

[0099] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the nonionic surfactant does not include isomeric octane polyoxyethylene propylene ether, and the reduced amount of isomeric octane polyoxyethylene propylene ether is proportionally allocated to AEO-7 and AEO-9. The remaining components and amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0100] Example 10

[0101] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the fabric softener does not include the hydrophilic cationic copolymer, and the reduced amount of the hydrophilic cationic copolymer is proportionally allocated to polyethylene glycol laurate and silicone-modified fabric softener. The remaining components and their amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0102] Example 11

[0103] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the fabric softener does not include polyethylene glycol laurate, and the reduced amount of polyethylene glycol laurate is proportionally allocated to the hydrophilic cationic copolymer and the silicone-modified fabric softener. The remaining components and their amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0104] Example 12

[0105] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the fabric softener does not include silicone-modified fabric softener, and the reduced amount of silicone-modified fabric softener is proportionally allocated to polyethylene glycol laurate and hydrophilic cationic copolymer. The remaining components and their amounts are the same as in Example 1, and the preparation method is the same as in Example 1.

[0106] Example 13

[0107] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and that in Example 1 is that the detergent additive does not include an enzyme preparation. The reduction in the amount of enzyme preparation is made up by deionized water. The remaining components and their amounts are the same as in Example 1. The preparation method is the same as in Example 1.

[0108] Example 14

[0109] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the detergent additive does not include an anti-redeposition agent. The reduction in the amount of anti-redeposition agent is made up by deionized water. The remaining components and their amounts are the same as in Example 1. The preparation method is the same as in Example 1.

[0110] Example 15

[0111] This embodiment provides a concentrated detergent. The only difference between the concentrated detergent and that in Example 1 is that the detergent additive does not include organic solvents. The reduction in the amount of organic solvents is made up by deionized water. The remaining components and their amounts are the same as in Example 1. The preparation method is the same as in Example 1.

[0112] Comparative Example 1

[0113] This comparative example provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the concentrated detergent does not include fabric softener. The reduction in the amount of fabric softener is made up by the proportion of each component in the detergent additive. The other components and their amounts are the same as in Example 1. The preparation method is the same as in Example 1.

[0114] Comparative Example 2

[0115] This comparative example provides a concentrated detergent. The only difference between the concentrated detergent and Example 1 is that the concentrated detergent does not include detergent additives. The reduction in detergent additives is made up by the proportion of each component in the fabric softener. The remaining components and their amounts are the same as in Example 1. The preparation method is the same as in Example 1.

[0116] Test Example 1: Detergency Test

[0117] The detergency test of the concentrated detergent was conducted in accordance with GB / T13174 "Determination of detergency and recycle performance of detergents for clothing". The ratio of the detergency values ​​of the concentrated detergents prepared in Examples 1-15 and Comparative Examples 1-2 to the detergency values ​​of standard laundry detergents for carbon black oil stains, protein stains, and sebum stains is shown in Table 1.

[0118] Note: Washing temperature 30℃, spin speed 120rpm, water hardness 250ppm (calculated as CaCO3), washing time 20min;

[0119] Table 1

[0120]

[0121]

[0122] As can be seen from the data in Table 1, the concentrated detergent provided by the present invention in Examples 1-3 has a significantly higher stain removal capacity than the standard laundry detergent, and has a better stain removal effect on stains such as carbon black, protein, and grease.

[0123] As can be seen from Example 1 and Comparative Examples 4-9, the types of anionic and nonionic surfactants in the concentrated detergent of the present invention affect the detergency of the detergent.

[0124] As can be seen from Examples 1 and 13, enzyme preparations also have a certain impact on the detergency of detergents;

[0125] As can be seen from Examples 1 and 15, when organic solvents are lacking, the dissolving effect of surfactants is poor, and gelation will occur, which in turn affects the detergency of detergents.

[0126] Test Example 2: Stability Test

[0127] The samples provided in Examples 1-3, 15 and Comparative Example 2 were tested according to the stability test methods and procedures described in QB / T 1224-2012. The test results are shown in Table 2.

[0128] Table 2

[0129]

[0130]

[0131] As shown in Table 2, the concentrated detergent of the present invention has excellent high and low temperature stability, while the system will exhibit stratification or crystal precipitation when organic solvent is lacking.

[0132] Test Example 3: Compliance Test

[0133] Several 30×30cm white cotton square towels sold in the market were taken and washed at room temperature with concentrated detergents from Examples 1-3, 10-12 and Comparative Examples 1-2 respectively. After washing and drying, 10 volunteers scored the softness and smoothness of the square towels. The results are shown in Table 3 (average values ​​are taken for each group).

[0134] The softness levels are as follows: 1 point (very firm), 2 points (somewhat firm), 3 points (neither firm nor soft), 4 points (somewhat soft), 5 points (very soft).

[0135] Smoothness of the hands: 1 point (dry), 2 points (somewhat dry), 3 points (moderate), 4 points (somewhat smooth), 5 points (very smooth).

[0136] Table 3

[0137]

[0138]

[0139] The data in Table 3 shows that the concentrated detergent of the present invention can maintain good softness after use. The data in Table 3 also shows that the components of the softener have a synergistic effect, and omitting any one of the components will affect the softening effect of the product.

[0140] The applicant declares that this invention illustrates a concentrated detergent, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this invention.

[0141] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0142] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A concentrated detergent, characterized in that, The concentrated detergent comprises, by weight, 1-20 parts anionic surfactant, 20-45 parts nonionic surfactant, 0.01-10 parts fabric softener, 0.1-15 parts detergent additive, and deionized water; The anionic surfactant is a combination of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate and disodium lauryl ether sulfosuccinate. The mass ratio of sodium fatty alcohol polyoxyethylene ether sulfate, sodium α-alkenyl sulfonate, and disodium lauryl ether sulfosuccinate is 1:(2-4):(0.1-1). The nonionic surfactant is a combination of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9 and isomeric octane polyoxyethylene propylene ether. The mass ratio of fatty alcohol polyoxyethylene ether-7, fatty alcohol polyoxyethylene ether-9 and isomeric octane polyoxyethylene propylene ether is 1:(1-2.5):(0.1-1).

2. The concentrated detergent as claimed in claim 1, wherein, The softener includes any one or a combination of at least two of the following: hydrophilic cationic copolymer, hydrolyzed wheat protein / silicone copolymer, diamide quaternary ammonium salt, silicone-modified softener, polyethylene glycol laurate, and silicone softener.

3. The concentrated detergent as claimed in claim 2, wherein, The softener is a combination of a hydrophilic cationic copolymer, an organosilicon-modified softener, and polyethylene glycol laurate.

4. The concentrated detergent as claimed in claim 3, wherein, The mass ratio of the hydrophilic cationic copolymer, the organosilicon-modified softener, and the polyethylene glycol laurate is 1:(0.5-2):(0.1-1.5).

5. The concentrated detergent as claimed in claim 1, wherein, The detergent additives include any one or a combination of at least two of the following: enzyme preparations, anti-redeposition agents, citric acid, or organic solvents.

6. The concentrated detergent as claimed in claim 5, wherein, The anti-redeposition agent includes any one or a combination of at least two of polyethyleneimine ethoxylate, sodium polyacrylate, or acrylic maleic acid copolymer.

7. The concentrated detergent as claimed in claim 5, wherein, The organic solvent includes any one or a combination of at least two of ethanol, propylene glycol, isohexyl glycol, and diethylene glycol butyl ether.

8. The concentrated detergent as claimed in claim 7, wherein, The organic solvent is isohexyl glycol.

9. The concentrated detergent as described in claim 5, characterized in that, The enzyme preparation includes any one or a combination of at least two of the following: protease, cellulase, amylase, lipase, pectinase, or mannanase.

10. The concentrated detergent as described in claim 9, characterized in that, The enzyme preparation is a combination of protease, lipase and amylase.

11. The concentrated detergent as described in claim 1, characterized in that, The concentrated detergent also includes any one or a combination of at least two of the following: fragrance, pH adjuster, or preservative.

12. The concentrated detergent as described in claim 11, characterized in that, The pH adjuster includes sodium hydroxide.

13. A method for preparing a concentrated detergent according to any one of claims 1-10, characterized in that, The preparation method includes mixing anionic surfactant, nonionic surfactant, fabric softener, detergent additive and deionized water in the prescribed amounts to obtain the concentrated detergent.

14. The method for preparing the concentrated detergent as described in claim 13, characterized in that, The preparation method includes: (1) The fabric softener and enzyme preparation are stirred evenly in deionized water, and after heating, anionic surfactant and nonionic surfactant are added to obtain mixture A; (2) Cool the mixture A obtained in step (1), add citric acid, preservative, anti-redeposition agent, organic solvent and fragrance in sequence and stir evenly, then add pH adjuster to adjust pH, and let stand to obtain the concentrated detergent.

15. The preparation method according to claim 14, characterized in that, Step (1) involves heating the temperature to 40-60℃.

16. The preparation method according to claim 14, characterized in that, Step (2) involves cooling the temperature to 25-35℃.

17. The preparation method according to claim 14, characterized in that, Step (2) involves adjusting the pH to 6-8.

18. The use of a concentrated detergent according to any one of claims 1-12 in fabric cleaning.

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