A kind of laundry liquid composition with high efficiency in removing blood stains and preparation method thereof

Abstract

The present invention relates to a highly effective blood stain removal laundry detergent composition, comprising the following components by weight: sodium octylsulfonate, tetrasodium glutamate diacetate, a sugar alcohol surfactant, other surfactants, an adjuvant, an enzyme preparation, and water; wherein the sugar alcohol surfactant is maltitol laurate and maltooligosaccharide glucoside. The detergent synergist obtained by mixing sodium octylsulfonate, maltitol laurate, and maltooligosaccharide glucoside has good stability and can improve blood stain removal.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemical products, in particular to a laundry detergent composition for efficiently removing blood stains and a preparation method thereof. Background Art

[0002] As we all know, blood stains are the most difficult to clean among fabric stains. They are divided into two types: fresh blood stains and old blood stains. Because the iron ions in fresh blood stains are ferrous, they are soluble in water and easier to clean. However, the iron ions in old blood stains have been oxidized to ferric iron, which forms complexes with proteins in the fabric, forming blood stains on the fabric that are difficult to remove. Even after cleaning with ordinary detergents, traces will remain on the fabric, greatly affecting the appearance of the fabric.

[0003] Existing washing methods for removing blood stains from fabrics involve applying strong oxidants such as bleach or color bleach to the stain and then hand-washing. However, this method is generally not considered due to its significant damage to clothing, the fabric's tendency to fade, and the strong oxidants' irritation to the skin. Alternatively, a laundry detergent containing protease can be added to dissolve old blood stains. However, another challenge is that protease activity is significantly affected by environmental factors, resulting in low stability within the system, making it difficult to maintain high enzyme activity and cleaning effectiveness over the long term. Furthermore, protease is not particularly effective on aged blood stains.

[0004] In summary, there is an urgent need to design a high-efficiency blood stain removal liquid laundry composition that can maintain long-lasting blood stain removal to solve the problems existing in the prior art. This is a huge challenge currently faced by the liquid detergent industry. Summary of the Invention

[0005] Based on this, the present invention provides a highly effective blood stain removal laundry detergent composition to overcome the shortcomings of the prior art. The synergistic effect between the enzyme preparation and the chemical detergent in the laundry detergent composition of this technical solution enables the laundry detergent composition to have an excellent blood stain removal effect.

[0006] An object of the present invention is to provide a laundry detergent composition for efficiently removing blood stains, wherein the laundry detergent composition comprises the following components in percentages by mass:

[0007]

[0008]

[0009] Wherein, the enzyme preparation is selected from one or more of protease and phosphodiesterase.

[0010] Furthermore, the enzyme preparation comprises the following components in percentage by mass:

[0011] Protease 0.1-5%

[0012] Phosphodiesterase 0.1-2%.

[0013] Furthermore, the sugar alcohol surfactant is selected from one or more of maltitol laurate and maltooligosaccharide glucoside.

[0014] Specifically, during the washing process, sodium octyl sulfonate can dissolve external dirt, and then allow protease to contact blood stain protein, accelerate the decomposition of blood stain protein, reduce the interference of other dirt on protease, improve reaction efficiency, and extend the action time of protease, thereby achieving the technical effect of deep decontamination and long-term blood stain removal, which is a significant improvement compared to existing technologies.

[0015] Furthermore, the other surfactants are selected from one or more of anionic surfactants and nonionic surfactants.

[0016] Furthermore, the anionic surfactant is selected from one or more of fatty alcohol salts, fatty acid alkyl ester sulfonates, fatty alcohol polyether sodium sulfates, α-olefin sulfonates, fatty acid methyl ester sulfonates, and fatty alcohol polyoxyethylene ether sulfates.

[0017] Furthermore, the nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, fatty alcohol alkoxylate, fatty acid methyl ester ethoxylate, fatty acid ethoxylate, and fatty acid alkylolamide.

[0018] Furthermore, the auxiliary agent is selected from one or more of preservatives, pH regulators, flavors, and pigments.

[0019] The present invention also provides a method for preparing a laundry detergent composition that is highly effective in removing blood stains, comprising the following steps:

[0020] L1. Heat some water to 50-70°C, add tetrasodium glutamate diacetate, stir evenly, add sodium octyl sulfonate and sugar alcohol surfactant, and stir until clear;

[0021] L2. Add other surfactants, stir evenly, reduce the temperature to below 40℃, adjust the pH value, add additives and enzyme preparations to the reactor, stir until uniform and transparent,

[0022] L3. Add the remaining amount of water and stir evenly to obtain the laundry detergent composition for efficiently removing blood stains.

[0023] The present invention has the following beneficial effects:

[0024] 1. The present invention provides a laundry detergent compound with a blood stain removal effect. By adding sodium octyl sulfonate, protease, and phosphodiesterase to the laundry detergent, the stability of the protease and phosphodiesterase is effectively improved, and a synergistic enhancement effect is produced with the protease and phosphodiesterase in terms of stain removal. Among them, sodium octyl sulfonate can serve as a load for the protease and phosphodiesterase, forming a stable core structure through cross-linking; at the same time, maltooligosaccharide glucoside and maltitol laurate are rich in hydroxyl functional groups, which can promote the protease and phosphodiesterase to bind to them through electrostatic interaction and hydrogen bonding, producing a synergistic enhancement effect, so that the phosphodiesterase and protease can be stably present in the composition for a long time, thereby avoiding the inactivation and failure of the active ingredients, making the protease and phosphodiesterase more active during the washing process, thereby greatly improving the stain removal effect.

[0025] 2. Compared to sodium dodecylbenzenesulfonate, a conventional surfactant raw material, the sodium octylsulfonate added in the present invention has a shorter carbon chain structure and stronger permeability, resulting in stronger penetration, encapsulation, and emulsification capabilities for stains. Sugar alcohol surfactants are surfactants synthesized from sugars and fatty alcohols, and their production raw materials are naturally renewable. This type of surfactant is easily degraded in nature, with the ether bonds in the ingredients breaking first, the sugars consumed and the carbon chains oxidized simultaneously, ultimately generating inorganic substances, water, and carbon dioxide. The resulting laundry detergent product is more easily decomposed in the environment, has good biodegradability, and does not cause environmental pollution. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solution of the present invention, the following examples are given. Unless otherwise stated, the raw materials, reactions and post-processing methods shown in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0027] The terms "preferred," "preferably," "more preferred," and the like, used herein, refer to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

[0028] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about." Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and appended claims are approximations that may vary depending upon the desired properties to be obtained by the present invention.

[0029] Sodium octyl sulfonate was purchased from Nouryon.

[0030] Tetrasodium glutamate diacetate and chelating agent GLDA were purchased from Nouryon.

[0031] Sodium fatty acid, anionic surfactant, was purchased from Chun Jin.

[0032] Fatty alcohol polyoxyethylene, nonionic surfactant, AE0-9, purchased from BASF.

[0033] Fatty acid methyl ester ethoxylate, nonionic surfactant, FMEE, were purchased from Sinolight Daily Chemical.

[0034] Sodium fatty alcohol polyoxyethylene ether sulfate, anionic surfactant, AES, were purchased from Zanyu.

[0035] α-Alkenyl sulfonate, anionic surfactant, AOS, were purchased from Zanyu.

[0036] Maltitol laurate was purchased from Foshan Shihuasha.

[0037] Maltooligosaccharide glucoside was purchased from Foshan Shihuasha.

[0038] Protease, alkaline protease, was purchased from Novozymes.

[0039] Phosphodiesterase, PDE enzyme, was purchased from Novozymes.

[0040] Sodium dodecylbenzenesulfonate was purchased from Zanyu.

[0041] Alkyl polyglycoside APG was purchased from BASF.

[0042] Example

[0043] Table 1 Composition ratio of laundry detergent compositions of Examples 1-3 and Comparative Examples 1-2

[0044]

[0045] The preparation method of the blood stain removing laundry detergent composition of Examples 1-3 comprises the following steps:

[0046] L1. Add 1 / 5 of soft water into the container, stir evenly, heat to 60℃, add tetrasodium glutamate diacetate and potassium hydroxide, stir to dissolve, then add sodium octylsulfonate, maltitol laurate and maltooligosaccharide glucoside, stir until uniform and transparent;

[0047] L2. Add anionic surfactant and nonionic surfactant, stir until completely dissolved, cool to 40°C and adjust the pH of the solution to 7.5, add protease, phosphodiesterase, preservatives, pigments, and flavors, and stir until dissolved;

[0048] L3. Add the remaining soft water and the remaining ingredients, and stir evenly to obtain the laundry detergent composition for efficiently removing blood stains.

[0049] Comparative Example 1

[0050] Comparative Example 1: The sodium octyl sulfonate in Example 2 was replaced by an equal amount of sodium dodecylbenzenesulfonate, and the other ingredients and preparation methods were the same.

[0051] Comparative Example 2

[0052] The difference between Comparative Example 2 and Example 2 is that in Comparative Example 2, maltitol laurate and maltooligosaccharide glucoside are replaced by alkyl glycoside APG of equal mass, and other ingredients and preparation methods are the same.

[0053] Test Example 1

[0054] Stability test of the laundry detergent compositions of Examples 1-3 and Comparative Examples 1-2

[0055] Test method:

[0056] Low-temperature stability test: Bottle the laundry detergent composition, seal it, and place it in an environment with a constant temperature of 0±2°C for 2 months. Then, remove it, return it to room temperature, and observe its appearance. If the laundry detergent composition shows no obvious discoloration, separation, or precipitation, it is considered to have passed the low-temperature stability test.

[0057] Room-temperature stability test: After sealing the bottle, place the laundry detergent composition at a temperature of 25±2°C for two months. Immediately remove the composition and inspect its appearance. If there is no noticeable discoloration, separation, or precipitation, the composition is considered to pass room-temperature stability.

[0058] High-temperature stability test: After sealing the bottle, the laundry detergent composition is placed in an environment with a constant temperature of 45±2°C for 2 months. After that, the composition is removed from the bottle and returned to room temperature for observation. If there is no obvious discoloration, separation, or precipitation, the laundry detergent composition is considered to pass the high-temperature stability test.

[0059] The results are shown in Table 2.

[0060] Table 2 Stability test results of laundry detergent compositions prepared in Examples 1-3 and Comparative Examples 1-2

[0061]

[0062]

[0063] As can be seen in Table 2, the laundry detergent compositions prepared in Examples 1-3 all met the required stability standards after two months at various temperatures, demonstrating that the components of the compositions are stable and suitable for use in laundry detergent compositions. The laundry detergent compositions of the present invention maintain a stable and uniform appearance under both high and low temperature conditions, ensuring a superior product appearance. However, in Comparative Example 1, where sodium octylsulfonate was replaced with sodium dodecylbenzenesulfonate, stratification occurred at high temperatures under high enzyme loading conditions. In Comparative Example 2, where the sugar alcohol surfactant was replaced with an alkyl glycoside, the laundry detergent composition exhibited instability and stratification at both high and low temperatures.

[0064] Test Example 2

[0065] Simulated blood stain removal test of the laundry detergent compositions of Example 2 and Comparative Examples 1-2

[0066] Test method:

[0067] (1) Test piece preparation: Cut pure cotton cloth into 10 cm × 10 cm pieces. Each set of test pieces for detergency testing should contain at least four pieces. Drop 0.25 g of pig blood in the middle of each test piece and allow it to age and disperse automatically without manual application. The blood-stained fabric was left to dry at room temperature for 12 h.

[0068] (2) Whiteness measurement: All test pieces are stacked and the whiteness values ​​before and after washing are read one by one using a whiteness meter at 457 nm. The whiteness before washing is measured at two points on each side of the test piece. The average of the four measurements is the whiteness before washing F1 of the test piece. The whiteness after washing is also measured. The average of the four measurements is the whiteness after washing F2 of the test piece.

[0069] Decontamination washing test:

[0070] (a) Divide the bloodstained fabrics into four groups. Take at least four treated pieces of bloodstained fabric from each group. Number the pieces with a marker. Test and record the pre-wash whiteness F1 of the test pieces.

[0071] (b) The washing test was conducted in a vertical detergent. The detergent ability of the laundry detergent compositions of Example 2 and Comparative Examples 1-2 was tested in accordance with GB / T 13174-2021 Determination of Detergency and Washing Cycle Performance of Detergents for Clothing, and the post-wash whiteness F2 of the test pieces was recorded.

[0072] (c) Calculate the whiteness difference (F2-F1) of each test piece before and after washing in a one-to-one correspondence manner, and for each group of test pieces, calculate and determine the detergent's decontamination value R and decontamination ratio P on each type of soiled fabric.

[0073] Table 3 Actual blood stain removal test results of the laundry detergent compositions of Example 2 and Comparative Examples 1-2

[0074]

[0075]

[0076] Table 3 shows that the laundry detergent composition of Example 2, when combined with sodium octyl sulfonate and a protease and phosphodiesterase, produced a blood stain removal composition significantly superior to the standard laundry detergent and the laundry detergent compositions of Comparative Examples 1-2. This demonstrates that sodium octyl sulfonate can serve as a carrier for the protease and phosphodiesterase, forming a stable core structure through cross-linking, thereby improving the dispersibility of the protease and phosphodiesterase, resulting in a more uniform dispersion in the composition and producing a synergistic effect. This enhances the blood stain removal effect.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0078] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A laundry detergent composition for efficiently removing blood stains, characterized in that: The laundry detergent composition is made of the following components in percentage by mass: Sodium octylsulfonate 5-15% Tetrasodium glutamate diacetate 1.5-5% Sugar alcohol surfactant 10-20% Other surfactants 5-25% Protease 0.1-5% Phosphodiesterase 0.1-2% Additives 0.1-5% Water balance; The preparation method of the high-efficiency blood stain removing laundry liquid composition comprises the following steps: L1. Heat some water, add tetrasodium glutamate diacetate, stir well, add sodium octyl sulfonate, sugar alcohol surfactant, and stir until clear; L2. Add other surfactants, stir well, adjust the pH, then add additives, protease, phosphodiesterase to the reactor and stir until uniform and transparent; L3. Add the remaining amount of water and stir to obtain the efficient blood stain removal laundry detergent composition; The sugar alcohol surfactant is a combination of maltitol laurate and maltooligosaccharide glucoside; The other surfactants are selected from one or more of anionic surfactants and nonionic surfactants.

2. The high-efficiency blood stain removing laundry detergent composition according to claim 1, characterized in that: The anionic surfactant is selected from one or more of fatty alcohol salts, fatty acid alkyl ester sulfonates, α-olefin sulfonates, and fatty alcohol polyoxyethylene ether sulfates.

3. The high-efficiency blood stain removing laundry detergent composition according to claim 1, characterized in that: The nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, fatty acid methyl ester ethoxylate, and fatty acid alkyl alcohol amide.

4. The high-efficiency blood stain removing laundry detergent composition according to claim 1, characterized in that: The auxiliary agent is selected from one or more of preservatives, pH regulators, flavors, and pigments.

5. The high-efficiency blood stain removing laundry detergent composition according to claim 1, characterized in that: In step L1, the heating temperature is 50-70°C.

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