Detergent special for dish-washing machine and preparation method thereof

Abstract

According to the detergent special for the dish-washing machine and the preparation method of the detergent, when the detergent special for the dish-washing machine is prepared, glass protection components including bismuth citrate and polyethyleneimine are added, the bismuth citrate and the polyethyleneimine can be adsorbed on the surface of glass in the washing process, and the glass is protected from being eroded by soft water; and chelating agents, namely sodium citrate and tetrasodium glutamate diacetate, are added, so that calcium and magnesium ions in water can be effectively combined and removed, and scale is prevented from being generated. However, in a detergent compounding system, the chelating agent is added and combined with the glass protection component, so that the proportional relation between the chelating agent and the glass protection component is crucial. Based on this, when the addition proportion of the chelating agent and the glass protection component in the detergent is further discussed and the problem can be solved, the inventor finds that the special detergent for the dish-washing machine with a stable system can be obtained by applying the chelating agent and the glass protection component in a certain proportion to the preparation of the detergent.

Description

Technical Field

[0001] The invention belongs to the technical field of detergent preparation, and in particular relates to a special detergent for dishwashers and a preparation method thereof. Background Art

[0002] At present, dishwashers are becoming more and more popular. When using dishwashers, detergents need to be added to help clean tableware. The tableware that needs to be cleaned by dishwashers is made of various materials, and the types of dirt on the tableware are also various. During the cleaning process, scratches may appear on the surface of smooth glass tableware; after repeated washing, the decorative patterns on glass and ceramic tableware will fade and lose their luster; the hardness of drinking water in northern my country is relatively high. After cleaning with a dishwasher that has not set a soft water process, gray-white spots and scale deposits will appear on the surface of glass tableware. While the scale stains the tableware, it will reduce the washing efficiency. Long-term use will also reduce the service life of the dishwasher; using a dishwasher with a soft water program added to clean, although the scale will be greatly reduced, the overly soft water quality will also cause permanent damage such as turbidity of the glass tableware.

[0003] Many existing dishwasher detergents add a large amount of chelating agents to soften water, reduce scale formation, and improve decontamination ability. However, high chelating agents will combine with the ions in the glass material itself that ensure transparency, and too soft water will cause minerals inside the glass to leach out. The dual effects will cause the tableware to become permanently turbid, losing its luster and transparency. This problem has not been solved. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a special detergent for dishwashers and a preparation method thereof. By adjusting the formula of the special detergent for dishwashers, the surface of tableware is protected, the service life of tableware is extended, and food safety is ensured without affecting the detergent's decontamination ability and system stability.

[0005] When preparing a special detergent for dishwashers, glass protection ingredients - bismuth citrate and polyethyleneimine are added. Bismuth citrate and polyethyleneimine can be adsorbed on the glass surface during the washing process to protect the glass from soft water erosion; adding chelating agents - sodium citrate and tetrasodium glutamate diacetate can effectively combine and remove calcium and magnesium ions in the water to prevent scale formation. However, in the detergent compound system, the addition of chelating agents will also combine bismuth citrate and polyethyleneimine. Therefore, the ratio of chelating agents and glass protection ingredients is crucial. Based on this, when further exploring the addition ratio of chelating agents and glass protection ingredients in detergents to solve the above problems, the inventors found that a chelating agent and glass protection ingredient in a certain ratio are used in the preparation of detergents to obtain a special dishwasher detergent with a stable system. In view of this, the inventors provide the following scheme of the present invention.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] The first aspect of the present invention provides a dishwasher-specific detergent, which comprises the following components in parts by mass:

[0008] Raw material name Mass fraction Thickener 0.1～1 Sodium Citrate 5～20 Tetrasodium Glutamate Diacetate 0.1～10 Acrylic acid copolymer 0.1～2 Low foaming nonionic surfactant 1～10 Propylene glycol 2～10 Complex enzyme preparations 0.2～2 Citric Acid 0.02～0.2 essence 0.1～0.5 Bismuth Citrate 0.02～0.1 Polyethyleneimine 0.05～1 Defoaming agent 0.02～0.2 preservative 0.1 Deionized water Fill to 100

[0009] Among them, bismuth citrate and polyethyleneimine are glass protection ingredients, sodium citrate and tetrasodium glutamate diacetate are chelating agents, which can soften water, increase the cleaning ability of detergents and leave no scale residue.

[0010] Furthermore, the thickener is one or a mixture of xanthan gum and sodium hydroxypropyl methylcellulose, which is mainly used for liquid thickening to ensure that the product is easy to pour.

[0011] Furthermore, the nonionic surfactant is ethoxylated propoxylated C 6-12 Alcohol / C 6-12 Fatty alcohol polyoxyethylene polyoxypropylene ether (HIF 4101), narrow distribution alkyl alcohol ether (Berol 266), fatty acid methyl ester ethoxylate (FMEE) or a mixture of several thereof.

[0012] Furthermore, the complex enzyme preparation is a mixture of several of amylase, protease, lipase and mannanase.

[0013] The second aspect of the present invention provides a method for preparing the dishwasher-specific detergent according to the first aspect, the method comprising the following steps:

[0014] (1) Weighing each component according to the weight ratio described in the first aspect;

[0015] (2) Add propylene glycol to the material tank, then add thickener and preservative in sequence and stir at a low speed. After the system is evenly dispersed, add 20% room temperature deionized water to swell during stirring to prepare a thickener pretreatment liquid;

[0016] (3) 30% of room temperature deionized water is added to the material kettle, and sodium citrate, tetrasodium glutamate diacetate, and acrylic acid copolymer are added in sequence, and then the pH is adjusted to 8.5-9 with citric acid, and then the thickener pretreatment solution prepared in step (2), low-foaming non-ionic surfactant, bismuth citrate, polyethyleneimine, complex enzyme preparation, flavor, and defoaming agent are added in sequence, and the remaining deionized water is added, stirred evenly, and filtered to obtain the dishwasher-specific detergent.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adjusts the formula of the dishwasher-specific detergent, and adds suitable glass protection ingredients - bismuth citrate and polyethyleneimine without affecting the detergent's decontamination; specifically, bismuth citrate and polyethyleneimine can be adsorbed on the glass surface during the washing process to protect the glass from soft water erosion. The chelating agents added at the same time - sodium citrate and tetrasodium glutamate diacetate - can effectively combine to remove calcium and magnesium ions in the water and prevent scale formation. However, the chelating agent will also combine with bismuth citrate and polyethyleneimine at the same time, so the ratio of the chelating agent to the glass protection ingredient is crucial. The present invention adjusts the ratio of the chelating agent to the glass protection ingredient to obtain a stable dishwasher-specific detergent, so that the tableware will not produce scale during multiple washing processes, and will not affect the effect of the glass protection ingredient. It extends the service life of the tableware and indirectly protects people's food safety. DETAILED DESCRIPTION

[0019] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0020] In the following examples, unless otherwise specified, all experimental instruments and raw materials involved are conventional commercially available products.

[0021] See Table 1 for raw materials.

[0022] Table 1

[0023]

[0024] Example 1

[0025] A dishwasher-specific detergent is prepared according to the following preparation method and the components and weight portions shown in Table 2. The specific preparation method includes the following steps:

[0026] (1) Weigh each component according to the weight parts shown in Table 2.

[0027] (2) Add propylene glycol to the material barrel, then add thickener and preservative in sequence and stir at a low speed. After the system is evenly dispersed, add 20% deionized water at room temperature to swell during stirring to prepare a thickener pretreatment liquid.

[0028] (3) 30% of room temperature deionized water is added to the material kettle, and sodium citrate, tetrasodium glutamate diacetate, and acrylic acid copolymer are added in sequence, and then the pH is adjusted to 8.5-9 with citric acid, and then the thickener pretreatment solution prepared in step (2), low-foaming non-ionic surfactant, bismuth citrate, polyethyleneimine, complex enzyme preparation, flavor, and defoaming agent are added in sequence, and the remaining deionized water is added, stirred evenly, and filtered to obtain the dishwasher-specific detergent.

[0029] Table 2

[0030]

[0031] The thickener is selected from xanthan gum, sodium hydroxypropyl cellulose or a mixture of the two, which is mainly used for liquid thickening, is conducive to storage and transportation, and ensures that the product is easy to pour.

[0032] Sodium citrate and tetrasodium glutamate diacetate are used as chelating agents. Their addition can soften water, increase the cleaning ability of detergents and leave no scale residue.

[0033] Acrylic acid copolymer acts as a dispersant, which can help the active ingredients disperse quickly in water and remove dirt quickly.

[0034] The low foaming nonionic surfactant used in the system is ethoxylated propoxylated C 6-12 Alcohol / C 6-12 A mixture of one or more of fatty alcohol polyoxyethylene polyoxypropylene ether (HIF 4101), narrow distribution alkyl alcohol ether (Berol 266), fatty acid methyl ester ethoxylate (FMEE), suitable for machine use, a low-foaming and high-permeability raw material, and an ingredient that helps to remove dirt and oil.

[0035] Propylene glycol is used to dissolve and disperse thickeners, and can penetrate into large stains on the surface of tableware to help remove them; the addition of complex enzyme preparations can help remove specific stains; the citric acid and sodium citrate buffer system maintains stability and helps stabilize the system; bismuth citrate and polyethyleneimine help protect glass tableware.

[0036] Test Case

[0037] This test example uses scoring method a in GB / T 24692-2009 to score the decontamination results of each group of dishwasher-specific detergents prepared in Example 1.

[0038] First, the dishwasher was used to wash five times with each group of dishwasher-specific detergents prepared in Example 1, and five testers were asked to rate the dishes. The results were as follows:

[0039]

[0040] Note: The larger the score, the better the cleaning power

[0041] Furthermore, the dishwasher-specific detergents of each group prepared in Example 1 were used to wash 10 glass cups and 8 porcelain bowls 50 times, and the glass transparency and the porcelain bowl glaze were evaluated.

[0042] Five judges were selected to rate the glass transparency and porcelain bowl glaze (5 is the highest and 1 is the lowest). The results are as follows:

[0043] 1# 2# 3# 4# 5# 6# glass 18 22 17 19 16 19 Porcelain bowl 22 23 21 22 22 24

[0044] Finally, it should be noted that the above is only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred arrangement scheme, a person skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A special detergent for dishwasher, characterized in that: The dishwasher-specific detergent contains the following components in parts by mass: Among them, bismuth citrate and polyethyleneimine are glass protective components, and sodium citrate and tetrasodium glutamate diacetate are chelating agents.

2. The dishwasher-specific detergent according to claim 1, characterized in that: The thickener is xanthan gum, sodium hydroxypropyl cellulose or a mixture of both.

3. The dishwasher-specific detergent according to claim 1, characterized in that: The low foam nonionic surfactant is ethoxylated propoxylated C 6-12 Alcohol / C 6-12 A mixture of one or more of fatty alcohol polyoxyethylene polyoxypropylene ether, narrow distribution alkyl alcohol ether, and fatty acid methyl ester ethoxylate.

4. The dishwasher-specific detergent according to claim 1, characterized in that: The complex enzyme preparation is a mixture of several of amylase, protease, lipase and mannanase.

5. A method for preparing a special dishwasher detergent as claimed in any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: (1) Weighing each component according to the weight proportions as described in claim 1; (2) Add propylene glycol to the material tank, then add thickener and preservative in sequence and stir at a low speed. After the system is evenly dispersed, add 20% room temperature deionized water to swell during stirring to prepare a thickener pretreatment liquid; (3) 30% of room temperature deionized water is added to the material kettle, and sodium citrate, tetrasodium glutamate diacetate, and acrylic acid copolymer are added in sequence, and then the pH is adjusted to 8.5-9 with citric acid, and then the thickener pretreatment solution prepared in step (2), low-foaming non-ionic surfactant, bismuth citrate, polyethyleneimine, complex enzyme preparation, flavor, and defoaming agent are added in sequence, and the remaining deionized water is added, stirred evenly, and filtered to obtain the dishwasher-specific detergent.

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