Environment-friendly energy-saving fabric low-temperature detergent and preparation method thereof

Abstract

The invention discloses an environment-friendly energy-saving fabric low-temperature detergent and a preparation method thereof, and belongs to the technical field of daily chemical products. Aiming at the technical bottlenecks that the decontamination capability of the traditional detergent is suddenly reduced under the condition of low temperature (10-25 DEG C) and the hard water adaptability is poor, and the pain points that the traditional detergent depends on high energy consumption and is low in decontamination efficiency, the invention provides the detergent. The method has the advantages that 1) a compound system of an anionic surfactant with a low Krafft point and a nonionic surfactant with a low cloud point or no cloud point higher than room temperature is optimized, and the stain permeation and emulsification efficiency in a low-temperature water environment is remarkably enhanced; 2) a chelating agent with good biodegradability and other assistants are added to ensure low-temperature washing stability, the decontamination index of the low-temperature fabric detergent at the water temperature of 20 DEG C is increased by 40% or above compared with that of a conventional product, the formula is environment-friendly, and a solution with energy-saving benefits and environment-friendly performance is provided for low-temperature textile cleaning.

Description

Technical Field

[0001] The present invention belongs to the technical field of daily chemical products, and specifically relates to a detergent composition having excellent detergency performance under low-temperature conditions and a preparation method thereof. Background Art

[0002] With the improvement of environmental protection and energy conservation awareness, low-temperature washing (≤30°C) has gradually become a trend. Traditional detergents have problems such as a decrease in the solubility of surfactants in low-temperature environments, resulting in a significant reduction in detergency. Traditional detergents have the following problems at low temperatures: 1) The activity of surfactants decreases, and the emulsification and dispersion ability for oil and protein stains is insufficient. The critical micelle concentration (CMC) of surfactants increases by 50 - 80% under low-temperature (<30°C) conditions, resulting in a decrease in detergency of more than 40%; 2) Calcium and magnesium ions in hard water are easily combined with surfactants to form precipitates, reducing the washing effect. Traditional detergents use sodium tripolyphosphate (STPP) as the main auxiliary agent, which can cause serious environmental problems. The phosphorus content in washing wastewater reaches 0.5 - 1.2 g / L, and 1 g of soluble phosphate can stimulate the growth of algal biomass by 70 - 120 g, causing water eutrophication. Currently, 38 major economies around the world have implemented phosphorus bans. At the same time, residual phosphates not only cause skin irritation (pH > 10), but also accelerate the corrosion of the inner wall of washing machines. Among the existing STPP replacement technologies, chelating agents (such as 4A zeolite and sodium metasilicate) can achieve calcium and magnesium ion exchange, but the exchange efficiency drops sharply by 60 - 70% in low-temperature environments, and it is easy to form deposits on the fabric surface, causing great damage to the fabric; 3) The activity of enzyme preparations is limited at low temperatures, further affecting the detergency efficiency. Existing low-temperature detergents mostly increase the amount of surfactants or use irritating chemical solvents, resulting in problems such as high costs and a large environmental burden. Summary of the Invention

[0003] In order to overcome the problems of decreased detergency, stain deposition, and great damage to fabrics of traditional detergents under low-temperature conditions, the present invention provides an efficient, environmentally friendly, and energy-saving low-temperature detergent.

[0004] A detergent composition provided by the present application adopts the following technical solution: A detergent composition comprising the following raw materials in parts by weight: Comprising the following components in mass percentages: Surfactant complex system 9 - 48%; Chelating agent 1 - 10%; Protease 0.5 - 2%; Enzyme stabilizer 1 - 6%; Deionized water balance; The composite surfactant system uses a blend of anionic / nonionic surfactants, with the anionic surfactant accounting for 4 - 33% and the nonionic surfactant for 5 - 15%; The anionic surfactants include one or more of alkyl sulfonates (C12 - 16), alkyl benzene sulfonates (C12 - 16), α-olefin sulfonates, alkyl sulfates (C12 - 16), fatty alcohol polyoxyethylene ether sulfates (C12, n = 3), fatty acid methyl ester sulfonates (C12 - 16), and sodium N-oleoylmethyl taurate.

[0005] The nonionic surfactants include one or more of C10 or C13 isomeric alcohol ethers, fatty acid methyl ester polyoxyethylene ethers, coconut alkanolamides, and C8 - C14 alkyl glycosides.

[0006] In the blended system, the fatty alcohol polyoxyethylene ether sulfate AES contains both ethoxy groups and sulfate groups in its structure, having the dual characteristics of anionic and nonionic surfactants. It exhibits excellent emulsifying ability and hard water resistance, and can form stable complexes with calcium and magnesium ions in hard water, thus maintaining its surface activity and detergency. The anionic surfactant alkyl benzene sulfonate LAS has strong detergency, and its solubility at low temperatures can be improved through blending. The anionic surfactant fatty acid methyl ester sulfonate MES is synthesized from natural oils and fats, has strong detergency at low temperatures, is non-toxic, has good biodegradability, and good calcium soap dispersing ability. The nonionic surfactant alkyl glycoside APG is synthesized from natural fatty alcohols and glucose, has excellent surface activity, degrades rapidly and completely, is harmless to the environment, is stable in acid, alkali, and salt media, has good compatibility, and has unique properties such as bactericidal and enzyme activity enhancing effects. After blending, a synergistic detergency system is formed at low temperatures, significantly improving the removal effect on stubborn stains such as sebum and oil stains.

[0007] Furthermore, the nonionic surfactants include one or more of isomeric alcohol ethers, fatty acid methyl ester polyoxyethylene ethers, coconut alkanolamides, and alkyl glycosides, etc.; Furthermore, the chelating agents include one or more of ethylenediaminetetraacetic acid, sodium oxalate, sodium gluconate, sodium metasilicate, trisodium citrate, and sodium polyacrylate. Further preferably, the chelating agents include one or more of sodium oxalate, sodium gluconate, trisodium citrate, and sodium metasilicate.

[0008] Furthermore, the enzyme stabilizers include one or more of calcium chloride, propylene glycol, glycerol, sodium tetraborate, sodium alginate, boric acid, and 4-formylphenylboronic acid.

[0009] The present invention also provides a preparation method for the liquid fabric detergent with high detergency performance, and the preparation steps are as follows: S1. Mix the anionic surfactant and the nonionic surfactant in proportion to form a premix; S2. Gradually add water to the premix under stirring conditions until a homogeneous composition is formed; S3. Add a chelating agent in a corresponding proportion to the composition and stir evenly; S4. Dissolve the enzyme stabilizer in advance in proportion and then drop in a corresponding proportion of protease preparation; S5. Add the solution containing the enzyme and the enzyme stabilizer to the stirred solution in S3 to form a homogeneous solution, thus obtaining the final detergent composition.

[0010] Advantages of the present invention: It provides an efficient, environmentally friendly and energy-saving low-temperature detergent, which overcomes the problems of reduced detergency, stain deposition and great damage to fabrics of traditional detergents under low-temperature conditions. The compound surfactant system is gentler on fabrics and suitable for low-temperature washing of various materials of clothes. This detergent can efficiently maintain the activity of surfactants in hard water. The added protease can still maintain a high activity at low temperature and, in synergistic action with the compound surfactant, accelerates the decomposition of protein stains (such as blood stains and milk stains), further enhancing the overall detergency effect.

[0011] The present invention optimizes a compound system of an anionic surfactant with a low Krafft point and a nonionic surfactant with a low cloud point above room temperature or no cloud point, and an environmentally friendly chelating agent, overall improving the washing effect of the detergent under low-temperature conditions, and becoming a detergent with both low-temperature high efficiency, environmental friendliness and controllable cost. Detailed implementation mode

[0012] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. Unless otherwise specified, the raw materials, reactions and post-treatment means in the examples are all common raw materials on the market and technical means well-known to those skilled in the art.

[0013] The following further illustrates the specific implementation of the present invention in combination with examples, but the implementation and protection of the present invention are not limited thereto. It should be noted that for the processes not specifically described in detail below, those skilled in the art can all implement or understand them with reference to the prior art. The reagents or instruments not indicating the manufacturer are regarded as conventional products that can be obtained through commercial purchase. Example 1

[0014] The component composition of the linen washing in this example is shown in Table 1.

[0015] Table 1 shows the component composition of the linen detergent

[0016] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel and stir at room temperature. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively. Example 2

[0017] The component composition of the linen detergent in this example is shown in Table 2.

[0018] Table 2 is the component composition of the linen detergent

[0019] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel and stir at room temperature. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively. Example 3

[0020] The component composition of the linen detergent in this example is shown in Table 3.

[0021] Table 3 is the component composition of the linen detergent

[0022] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel and stir at room temperature. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0023] Example 4: Table 4 is the component composition of the linen detergent

[0024] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel and stir at room temperature. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0025] Example 5: Table 5 is the component composition of the linen detergent

[0026] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel and stir at room temperature. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0027] Example 6: Table 6 is the component composition of the linen detergent

[0028] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel at room temperature and stir. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0029] Example 7: Table 7 shows the composition of the linen detergent

[0030] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel at room temperature and stir. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0031] Example 8: Table 8 shows the composition of the linen detergent

[0032] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel at room temperature and stir. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer respectively.

[0033] Example 9: Table 9 shows the composition of the linen detergent

[0034] The preparation steps of the linen detergent in this example are as follows: Add non-ionic surfactant and anionic surfactant to a reaction vessel at room temperature and stir. Add deionized water to dissolve. After complete dissolution, add a chelating agent, an enzyme preparation, and an enzyme stabilizer.

[0035] Comparative Example 1: In Comparative Example 1, all the surfactants in Example 1 were replaced with sodium lauryl ether sulfate AES in proportion, and the other components were exactly the same as those in Example 1.

[0036] Comparative Example 2: In Comparative Example 2, all the surfactants in Example 2 were replaced with linear alkylbenzene sulfonate LAS in proportion, and the other components were exactly the same as those in Example 2.

[0037] Comparative Example 3: In Comparative Example 3, all the surfactants in Example 3 were replaced with methyl ester sulfonate MES in proportion, and the other components were exactly the same as those in Example 3.

[0038] Comparative Example 4: In Comparative Example 4, all the surfactants in Example 4 were replaced with alkyl polyglucoside APG in proportion, and the other components were exactly the same as those in Example 4.

[0039] Comparative Example 5: Comparative Example 5, a commercially available detergent sample. Test method: Refer to "GB / T 35744-2017 Quality Requirements for Cleaning Public Textiles" "GB / T 13174-2008 Determination of Detergency and Recycling Washing Performance of Detergents for Clothing Fabrics" was used for the detergency test.

[0040] The washing temperature was 20°C and the washing time was 20 minutes.

[0041] The detergency values of the liquid fabric detergents of Examples 1-9 and Comparative Examples 1-5 for three standard soiled cloths, JB-01 (carbon black soiled cloth), JB-02 (protein soiled cloth), and JB-03 (sebum soiled cloth), are shown in Table 10. The larger the detergency value, the better the washing effect.

[0042]

[0043] It can be seen from the table that compared with the results of the comparative examples, the examples are generally higher than the comparative examples, indicating that the washing and detergency performance is better after the surfactant is compounded than that of a single surfactant; the chelating agent can chelate calcium and magnesium ions in water, improve the existing environment of the surfactant, enable the surfactant to play a normal emulsifying and wetting role, and maintain the detergency ability. The washing effects of the examples on the three soiled cloths are better than those of the commercially available samples (Comparative Example 5).

[0044] In summary, Examples 1-9 of the present application have outstanding advantages in performance compared with the commercially available fabric detergents of the comparative examples, such as energy saving, environmental friendliness, and excellent detergency. Using this detergent for fabric washing under low-temperature conditions has broad application prospects.

[0045] The above examples are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above examples. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A detergent composition, characterized in that, The liquid fabric detergent with detergency performance comprises components in the following mass percentages: Surfactant complex system: 9 - 48%; Chelating agent: 1 - 10%; Protease: 0.5 - 2%; Enzyme stabilizer: 1 - 6%; Deionized water: the balance; The composite surfactant system is a blend of anionic / nonionic surfactants, with the anionic surfactant being 4 - 33% and the nonionic surfactant being 5 - 15%.

2. The detergent composition according to claim 1, characterized in that: The anionic surfactant includes one or more of C12 - C16 alkyl sulfonates, C12 - C16 alkyl benzene sulfonates, α - olefin sulfonates, C12 - C16 alkyl sulfates, dodecyl polyoxyethylene ether (3) sulfates, C12 - C16 fatty acid methyl ester sulfonates, and sodium N - oleoyl methyl taurate.

3. A detergent composition according to claim 1, characterized in that: The nonionic surfactant includes one or more of C10 or C13 isomeric alcohol ethers, fatty acid methyl ester polyoxyethylene ethers, coconut alkanolamides, and C8 - C14 alkyl glycosides.

4. A detergent composition according to claim 1, characterized in that: The chelating agent is one or more of ethylenediaminetetraacetic acid, sodium oxalate, sodium gluconate, sodium metasilicate, trisodium citrate, and sodium polyacrylate.

5. A detergent composition according to claim 1, characterized in that: The enzyme stabilizer includes one or more of calcium chloride, propylene glycol, glycerol, sodium tetraborate, sodium alginate, boric acid, and 4 - formylphenylboronic acid.

6. A method for preparing a detergent composition according to any one of claims 1-5, characterized in that, It includes the following steps: S1. Mix the anionic surfactant and the nonionic surfactant according to the mass percentages of the components to form a premix. S2. Gradually add deionized water to the premix under stirring conditions until a uniform composition is formed. S3. Add the chelating agent to the composition and stir evenly. S4. Dissolve the enzyme stabilizer and then drop it into the protease preparation. S5. Add the solution containing the enzyme and the enzyme stabilizer to the stirred solution in S3 to form a uniform solution, obtaining the final detergent composition.

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