A detergent composition and a method of making the same

Abstract

The application discloses a use of a benzisothiazolinone as an additive for improving stability of an enzyme preparation in a dishwashing composition system, and a dishwashing composition and a preparation method thereof, and belongs to the technical field of detergent compositions. The dishwashing composition comprises the following components in percentage by weight: 10.0-30.0% of an anionic surfactant; 0.01-1.0% of an enzyme preparation; at least 0.005% of the benzisothiazolinone; and water, the balance up to 100%. The application discloses a new application of the benzisothiazolinone, and the benzisothiazolinone can be used as the additive for improving the stability of the enzyme preparation in the dishwashing composition system. The application discloses a dishwashing composition, which not only has excellent decontamination capacity, but also can significantly improve enzyme stability in the dishwashing composition through an enzyme stabilizer, so that the dishwashing composition can maintain high enzyme activity in a shelf life.

Description

Technical Field

[0001] This invention relates to the field of detergent composition technology, and more specifically, to a dishwashing liquid composition and its preparation method. Background Technology

[0002] The basic function of dishwashing liquid is to remove grease, which can be removed through the solubilizing, emulsifying, and dispersing effects of surfactants. However, plates not only contain grease but also large molecular dirt such as protein and starch. While soaking can weaken the adhesion between the dirt and the plate surface, consumers still need to use tools like scouring pads or steel wool to scrub it away, which is time-consuming and laborious.

[0003] The hydrolytic effect of biological enzymes can improve the removal effect of dishwashing liquid on protein and starch stains. The benefits of enzymes are mainly reflected in several aspects: First, the hydrolytic effect of enzymes can remove protein and starch stains more thoroughly, and continuous use of dishwashing liquid containing enzymes can keep dishes sparkling clean. Second, the decomposition of stains by enzymes can reduce the strength of protein and starch stains on dishes, so dishes can be cleaned without the use of dishwashing tools such as steel wool, reducing the damage to dishes caused by friction from dishwashing tools.

[0004] While biological enzyme preparations offer numerous advantages, their molecular structure leads to poor stability in dishwashing liquids, resulting in reduced detergency as enzymes decompose. Research has revealed that certain oxidizing substances in dishwashing liquids contribute to enzyme instability. Although oxidants are generally rare in dishwashing liquid formulations, some raw materials can introduce oxidizing agents. For example, bleaching processes using surfactants can leave hydrogen peroxide residue, and the ozone residue often used in dishwashing liquids to kill bacteria can also degrade enzyme stability. This enzyme stability issue limits its widespread use in dishwashing liquids, necessitating technological innovation to address this problem. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects and shortcomings of poor enzyme stability in existing dishwashing liquid compositions, and to provide a dishwashing liquid composition with excellent enzyme stability.

[0006] Another object of the present invention is to provide the use of benzisothiazolinone as an additive to improve the stability of enzyme preparations in detergent composition systems.

[0007] Another object of the present invention is to provide a method for preparing a dishwashing liquid composition.

[0008] The above-mentioned objective of this invention is achieved through the following technical solution:

[0009] The use of benzisothiazolinone as an additive to improve the stability of enzyme preparations in detergent composition systems.

[0010] While benzisothiazolinones have been widely used in detergent composition technology, they are generally used as preservatives, and there are no reports of their use in improving the stability of enzymes in detergent compositions. The inventors unexpectedly discovered that in detergent compositions where the main component is anionic surfactants, benzisothiazolinones can reduce the impact of residual oxidants from anionic surfactants, improve the stability of enzymes in the detergent composition, and allow the detergent composition to maintain high enzyme activity throughout its shelf life.

[0011] This invention also protects a detergent composition comprising, by weight percentage:

[0012]

[0013] The inventors unexpectedly discovered that benzisothiazolinone can reduce the impact of residual oxidants in anionic surfactants, improve the stability of enzyme preparations in detergent compositions, and enable detergent compositions to maintain high enzyme activity during their shelf life.

[0014] In practical applications, the detergent composition may also include one or more of the following: amphoteric surfactants, chelating agents, nonionic surfactants, or preservatives.

[0015] Preferably, the detergent composition comprises, by weight percentage, the following components:

[0016]

[0017] Amphoteric surfactants are used to adjust the viscosity of detergents and increase their foaming properties. They also have the advantages of low toxicity, low irritation to skin and eyes, good biodegradability, and compatibility.

[0018] The amphoteric surfactant may be a commonly used amphoteric surfactant in the art.

[0019] In practical applications, the amphoteric surfactant is one or more of amine oxide amphoteric surfactants and betaine amphoteric surfactants.

[0020] The function of chelating agents is to eliminate the influence of metal ions in water through chelation.

[0021] The chelating agent can be a commonly used chelating agent in the art.

[0022] In practical applications, the chelating agent is one or more of sodium glutamate diacetate, sodium citrate, and trisodium methylglycine diacetate.

[0023] The purpose of nonionic surfactants is to further enhance their detergency against oily dirt.

[0024] The nonionic surfactant may be a commonly used nonionic surfactant in the art.

[0025] In practical applications, the nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene / propylene ether, and alkyl glucosides.

[0026] Preservatives are used to prevent bacteria from multiplying and causing detergent to spoil.

[0027] The preservative may be a commonly used preservative in the art.

[0028] In practical applications, the preservative is one or more of methylisothiazolinone or methylchloroisothiazolinone.

[0029] Preferably, the detergent composition further contains 0.003% to 0.01% vitamin E acetate by weight percentage.

[0030] Vitamin E acetate can synergistically enhance the stability of enzyme preparations in detergent compositions by interacting with benzisothiazolinone.

[0031] Preferably, the amount of benzisothiazolinone is 0.005 to 0.05% of the total weight of the detergent composition.

[0032] When the total amount of benzisothiazolinone is less than 0.05%, it can prevent the detergent composition from producing significant irritation.

[0033] More preferably, the detergent composition comprises, by weight percentage, the following components:

[0034]

[0035] Preferably, the enzyme preparation is one or more of amylase or protease.

[0036] More preferably, the enzyme preparation is amylase or a mixture of amylase and protease.

[0037] In this invention, benzisothiazolinone has a more significant effect on improving the stability of amylase.

[0038] Anionic surfactants function as detergents, foamers, dispersers, emulsifiers, and wetting agents. The anionic surfactant may be a commonly used anionic surfactant in this field.

[0039] Preferably, the anionic surfactant is one or more of sodium alkylbenzene sulfonate, sodium fatty acid methyl ester sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium fatty alcohol sulfate, sodium fatty acyl glutamate, sodium fatty acyl sarcosinate, and sodium fatty acyl glycinate.

[0040] Among them, sodium fatty acylglutamate, sodium fatty acyl sarcosinate, and sodium fatty acyl glycinate can be made from natural ingredients or synthesized artificially.

[0041] Preferably, the amount of sodium alkylbenzene sulfonate used is no more than 4% of the total weight of the detergent composition.

[0042] Compared to other types of anionic surfactants, sodium alkylbenzene sulfonate significantly reduces the stability of enzyme preparations in detergent compositions. Therefore, in the detergent compositions of the present invention, the amount of sodium alkylbenzene sulfonate is no more than 4% of the total weight of the detergent composition, which is more conducive to improving the stability of enzyme preparations.

[0043] More preferably, the amount of sodium alkylbenzene sulfonate used is 2 to 3% of the total weight of the detergent composition.

[0044] Preferably, the residual ozone content in the water in the detergent composition exceeds 0.1 ppm.

[0045] In dishwashing liquids, the water added is usually disinfected with ozone to prevent the excessive growth of bacteria. However, this can leave ozone residue. Generally, the ozone content exceeds 0.1 ppm.

[0046] Even when the ozone content in the water used in the detergent of this invention exceeds 0.1 ppm, benzisothiazolinone enhances the stability of the enzyme preparation in the detergent composition.

[0047] Benzo[a](x)-isothiazolinone can also reduce the impact of residual oxidants from ozone disinfection processes and improve the stability of enzyme preparations in detergent compositions.

[0048] Preferably, the water in the detergent composition is soft water.

[0049] The present invention also protects a method for preparing the above-mentioned dishwashing liquid composition, comprising the following steps: mixing the components to obtain the dishwashing liquid composition.

[0050] Preferably, during the component mixing process, an enzyme catalyst is also added to eliminate hydrogen peroxide that may be present in the raw materials of each component.

[0051] The most common type of enzyme catalyst mentioned is catalase.

[0052] Catalase can react with hydrogen peroxide in detergent compositions, thereby further improving the stability of the enzyme preparation.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] This invention discloses a new application of benzisothiazolinone, which can be used as an additive to improve the stability of enzyme preparations in detergent composition systems.

[0055] This invention discloses a dishwashing liquid composition that not only has excellent detergency and is green and low-carbon, but also significantly improves the enzyme stability in the dishwashing liquid composition through benzisothiazolinone, so that the dishwashing liquid composition can maintain high enzyme activity during its shelf life. Detailed Implementation

[0056] The present invention will be further described below with reference to specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise stated, the raw materials and reagents used in the embodiments of the present invention are conventionally purchased raw materials and reagents.

[0057] Sodium dodecylbenzenesulfonate: LAS-Na, active ingredient content is 100%.

[0058] Sodium fatty alcohol polyoxyethylene ether sulfate: AES, active ingredient content is 100%.

[0059] C10~C14 alkyl sulfate sodium: K12, active ingredient content is 100%.

[0060] Alkylamidopropylamine oxide: CAO, active ingredient content is 100%.

[0061] Alkylamidopropyl betaine: LAB, active ingredient content is 100%.

[0062] Alkyl glucoside: APG, active ingredient content is 100%.

[0063] Tetrasodium glutamate diacetate (GLDA), active ingredient content is 100%.

[0064] Benzisothiazolinone: BIT, active ingredient content is 100%.

[0065] Vitamin E acetate: active ingredient content is 100%.

[0066] In the example, the ozone content in the soft water was 0.15 ppm.

[0067] Examples 1-9

[0068] A dishwashing liquid composition was prepared according to the formulations in Table 1, as described in Examples 1-9.

[0069] The specific preparation method of the detergent composition in the above embodiments is as follows:

[0070] S1. Add soft water, turn on the stirrer, and add liquid alkali;

[0071] S2. Add sulfonic acid for neutralization, then add anionic surfactant, amphoteric surfactant, nonionic surfactant, and chelating agent and stir until homogeneous;

[0072] S3. Adjust the pH to 7-8, add 10-100 ppm catalase and stir well. Then add the enzyme preparation, BIT, vitamin E acetate and preservative, and stir well to obtain the detergent composition.

[0073] The specific content of each component is shown in Table 1 below.

[0074] Table 1. Composition of the dishwashing liquid compositions in each embodiment (by weight percentage)

[0075]

[0076] Continued from Table 1

[0077]

[0078] Comparative Examples 1-2

[0079] A dishwashing liquid composition, according to the formulation in Table 2, is prepared as comparative examples 1 to 2.

[0080] The preparation method of the comparative detergent composition is the same as that of the examples, and will not be repeated here.

[0081] The specific content of each component is shown in Table 2 below.

[0082] Table 2. Composition of the dishwashing liquid compositions in each comparative example (by weight percentage)

[0083]

[0084] Specific application effect experiment

[0085] The performance of the detergent compositions of the above embodiments and comparative examples was tested.

[0086] Enzyme activity stability test: Place in a 37℃ oven for 4 weeks, then test enzyme activity.

[0087] (1) Amylase test method

[0088] The principle of the amylase activity assay: The substrate 4,6-acetal-(G7)-p-nitrophenyl-(G1)-α-D-maltoheptaosid (hexyl-G7pNP) is decomposed by amylase into G2pNP, G3pNP, and G4pNP. These fragments can then be completely decomposed into glucose by α-glucosides, further forming yellow p-nitrophenol. The rate of p-nitrophenol formation is detected by the fully automated biochemical analyzer Konelab, and the absorbance at 405 nm is proportional to the amylase activity in the sample.

[0089] Amylase activity test conditions:

[0090] The wavelength was 405 nm, the reaction time was 240 seconds, the measurement time was 195 seconds, the temperature was 30℃, and the pH was 7.0.

[0091] (2) Protease test method

[0092] The principle of the protease activity assay: Dimethyl casein (DMC) is hydrolyzed into small amino acids by proteases. The released amino acid clusters form a colored complex with trinitrobenzenesulfonic acid (TNBS). The absorbance of the solution after the reaction is measured at a wavelength of 405 nm using a fully automated biochemical analyzer, Konelab. The change in absorbance per unit time is calculated to determine the enzyme activity.

[0093] Protease test conditions:

[0094] The wavelength was 405 nm, the reaction time was 200 seconds, the temperature was 50℃, and the pH was 9.0.

[0095] The stability is calculated as: actual enzyme activity / theoretical enzyme activity * 100%.

[0096] The results of the enzyme activity stability test are shown in Table 3.

[0097] Table 3

[0098]

[0099] The results above show that the enzyme activity and stability of amylase and protease are significantly improved in the detergent composition of the present invention.

[0100] As can be seen from the examples and Comparative Example 1, the detergent composition does not contain benzisothiazolinone, and the enzyme activity stability is only 8%.

[0101] As can be seen from Examples and Comparative Example 2, when benzisothiazolinone is replaced with methylisothiazolinone in the detergent composition, the enzyme activity stability is only 8.8%.

[0102] As can be seen from Examples 1 and 4, benzisothiazolinone in the detergent composition can enhance the stability of the enzyme preparation. The mixture of benzisothiazolinone and vitamin E acetate has a synergistic effect, further enhancing the stability of the enzyme preparation.

[0103] As can be seen from Examples 1 and 6, when the enzyme preparation is a mixture of amylase and protease, the stability of the protease can also be maintained at 85%, which is a good level.

[0104] As can be seen from Examples 1 and 9, the amount of sodium alkylbenzene sulfonate used is less than 4% of the total weight of the detergent composition, which results in higher stability of the enzyme preparation.

[0105] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dishwashing liquid composition, characterized in that, By weight percentage, it consists of the following components: Anionic surfactants: 10.0%~30.0%; Enzyme preparations: 0.01~1.0%; Benzisothiazolinone 0.005~0.05%; Vitamin E acetate 0.003%~0.01%; Water level should be increased to 100%. The enzyme preparation is one or more of amylase or protease; The anionic surfactant is sodium dodecylbenzenesulfonate and sodium fatty alcohol polyoxyethylene ether sulfate; the amount of sodium dodecylbenzenesulfonate is 2-4% of the total weight of the detergent composition.

2. A dishwashing liquid composition, characterized in that, By weight percentage, it consists of the following components: Anionic surfactants: 10.0%~30.0%; Enzyme preparations: 0.01~1.0%; Benzisothiazolinone 0.005~0.05%; Amphoteric surfactants 0.1~0.5%; Nonionic surfactants: 0.1-3%; Chelating agent 0.1~2.0%; Preservatives: 0.003~0.1%; Water level should be increased to 100%. The anionic surfactant is sodium dodecylbenzenesulfonate and sodium fatty alcohol polyoxyethylene ether sulfate; the amount of sodium dodecylbenzenesulfonate is 2-4% of the total weight of the detergent composition.

3. A dishwashing liquid composition, characterized in that, By weight percentage, it consists of the following components: Anionic surfactants: 10.0%~30.0%; Enzyme preparations: 0.01~1.0%; Benzisothiazolinone 0.005~0.05%; Amphoteric surfactants 0.1~0.5%; Nonionic surfactants: 0.1-3%; Chelating agent 0.1~2.0%; Preservatives: 0.003~0.1%; Vitamin E acetate 0.003%~0.01%; Water level should be increased to 100%. The anionic surfactant is sodium dodecylbenzenesulfonate and sodium fatty alcohol polyoxyethylene ether sulfate; the amount of sodium dodecylbenzenesulfonate is 2-4% of the total weight of the detergent composition.

4. The detergent composition according to any one of claims 1 to 3, characterized in that, The amount of sodium dodecylbenzenesulfonate used is 2-3% of the total weight of the detergent composition.

5. The detergent composition according to claim 2 or 3, characterized in that, The amphoteric surfactant is one or more of amine oxide amphoteric surfactants and betaine amphoteric surfactants.

6. The detergent composition according to claim 2 or 3, characterized in that, The nonionic surfactant is one or more of fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene polyoxypropylene ether, and alkyl glucoside.

7. The detergent composition according to claim 2 or 3, characterized in that, The chelating agent is one or more of sodium glutamate diacetate, sodium citrate, and trisodium methylglycine diacetate.

8. The detergent composition according to claim 2 or 3, characterized in that, The preservative is one or more of methylisothiazolinone or methylchloroisothiazolinone.

9. The detergent composition according to any one of claims 1 to 3, characterized in that, The residual ozone content in the water in the detergent composition exceeds 0.1 ppm.

10. A method for preparing the detergent composition according to any one of claims 2 to 9, characterized in that, The process includes the following steps: mixing the components to obtain the detergent composition.

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