A liquid dishwasher tank cleaner having a dual phase appearance and method of making

Abstract

The application discloses a liquid dishwasher tank cleaner with a dual-phase appearance and a preparation method. The cleaner comprises the following components by weight percentage: 0.01%-20% of a low-foaming isomeric fatty alcohol alkoxylate surfactant; 0.0%-20% of an ethylene oxide / propane block copolymer surfactant; 0.1%-35% of an alkaline soil cleaning agent; 0.01%-25% of a metal protection agent; 0.01%-5% of a bactericide; 0.05%-5% of other components; and the rest is soft water. Through the wetting and emulsifying effects of the surfactant and the strong soil removal effect of the alkaline soil cleaning agent, the dishwasher tank is cleaned under acidic conditions, the adhered organic soil, scale and microbial plaque on the dishwasher tank wall are effectively broken down and loosened, the metal material of the dishwasher tank is protected without damage, the product has a remarkable soil removal effect on the dishwasher tank, and is suitable for cleaning and sterilizing the dishwasher tank.

Description

Technical Field

[0001] This invention belongs to the field of daily chemical products, specifically relating to a liquid dishwasher tub cleaner with a two-phase appearance and its preparation method. Background Technology

[0002] With the innovation and advancement of technology, household dishwashers have become increasingly popular, becoming a major household appliance in people's daily lives. Dishwashers remove dirt from dishes primarily through the powerful jetting action of water in three-dimensional space, the thermal energy of heated water, and the degreasing and stain-removing effects of detergents. After being pressurized by a pressure pump, the water jets are sprayed from the nozzles into the dishwasher, where they rotate in three-dimensional space, leaving no blind spots. The powerful impact of the jetting water effectively removes dirt adhering to the dishes. People generally believe that dishwashers, used frequently for washing dishes, must be clean themselves, thus eliminating the need for cleaning and disinfection. However, due to the unique structure of dishwashers, stubborn dirt and grime in the inner tub that hasn't been cleaned for a long time are invisible to the naked eye. In reality, dishwashers accumulate a large amount of grime on their inner walls, including inorganic salts. During the washing process, the heat from the tap water evaporates, forming crystalline salts, particularly calcium bicarbonate and magnesium bicarbonate, which weather into insoluble calcium carbonate and magnesium carbonate deposits. There's also calcium soap scum, formed when fatty acid soaps from food residue saponify at high temperatures combine with calcium and magnesium ions in the water to form insoluble substances. Other grime includes sebum, mold, and bacteria, resulting from residual food grease and dirt accumulated over time. Dishwashers are often placed in poorly ventilated, high-humidity environments, and most households don't open the lid to ventilate and dehumidify after washing dishes, all of which promote the growth of microorganisms inside the dishwasher. Surveys of older dishwashers revealed severe grime buildup in the inner drum's compartments and on the surface of the drain, parts that most users don't bother to thoroughly clean.

[0003] Currently, there are no dedicated dishwasher tub cleaners. Chinese patent CN 101070512 A describes a washing machine tub cleaner, which uses an oxidative bleaching system. The patent discloses an oxidative bleaching agent that removes dirt through a combination with surfactants. However, without an activator, the effectiveness of oxidative bleaching agents is very limited, or the washing temperature must be increased to release active oxygen. Furthermore, the formula is strongly alkaline and oxidizing, so its corrosion resistance to the washing machine tub must be considered. The above patent uses an alkaline formula system. Analysis of dishwasher tub dirt shows that a large amount of dirt consists of inorganic salts, calcium soap scum, grease, mold, etc., intertwined and accumulated over time to form dense, stubborn stains. Therefore, while oxidative bleaching agents and surfactants have some cleaning power and bacterial killing function for organic stains in the dishwasher tub, their effectiveness in removing dirt inside the tub is very limited. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid dishwasher tub cleaner with a dual-phase appearance and its preparation method. It effectively breaks down and loosens stubborn stains such as inorganic salt dirt, limescale, calcium soap scum, and grease on the dishwasher tub wall through the interaction of surfactants and alkaline dirt cleaners. It is easy to use, provides corrosion protection, and also has bactericidal and deodorizing effects without damaging the surface of the dishwasher tub.

[0005] This invention is achieved through the following technical solution:

[0006] The present invention provides a liquid dishwasher tub cleaner with a dual-phase appearance comprising the following raw material components by weight percentage:

[0007] 0.01%~20% of low-foaming isomeric fatty alcohol alkoxylated surfactants;

[0008] 0.01%~20% of ethylene oxide / propane block copolymer surfactant;

[0009] 0.1%~35% alkaline dirt cleaner;

[0010] 0.01%~10% metal protectant;

[0011] 0.01%~5% bactericide;

[0012] 0.1%~2% of other components;

[0013] Preferably, the low-foaming isomeric fatty alcohol alkoxylate surfactant has the following general formula:

[0014]

[0015] Wherein, n is 2 to 16, preferably 10 to 15, more preferably 13, and n is a positive integer;

[0016] m is 0~8, preferably 1~3, and m is a positive integer;

[0017] x is 0~15, preferably 3~7;

[0018] The emulsified polyether surfactant may also have the following general formula:

[0019]

[0020] The polyether surfactant has a molecular weight of 1000-6500, preferably 2000-3500.

[0021] The percentage content of polyethylene oxide in the ethylene oxide / propane block copolymer surfactant is 10% to 80%; preferably 10% to 40%.

[0022] The ethylene oxide / propane block copolymer surfactant has 3-10 molar numbers of polypropylene groups in its molecule; preferably 6-9.

[0023] Preferably, both the low-foaming isomeric fatty alcohol alkoxylate surfactant and the ethylene oxide / propane block copolymer surfactant are low-foaming nonionic surfactants with low HLB values, preferably in the range of 6-13, and more preferably 8-10. Specifically, they are any one or a mixture of two or more isomeric fatty alcohol polyoxyethylene ether surfactants.

[0024] Preferably, the liquid dishwasher tub cleaner has a two-phase appearance, and the mass ratio of the low-foaming isomeric fatty alcohol alkoxylate surfactant and the ethylene oxide / propane block copolymer surfactant can be adjusted to achieve a transformation from a two-phase appearance to a homogeneous appearance. When the mass ratio of the compounding... m (Low-foaming isomeric fatty alcohol alkoxylates): m The ratio of ethylene oxide / propane block copolymer surfactant is greater than or equal to 20:1, and the product has a two-phase appearance.

[0025] Preferably, the alkaline dirt-cleaning agent is any one or a mixture of two or more of citric acid, lactic acid, tartaric acid, and acetic acid. The preferred total content of the alkaline dirt-cleaning agent is 10%-30%.

[0026] Preferably, the metal protectant is any one or a mixture of two or more of sodium benzoate, urea, and alkyl disulfonic acid diphenyloxy disodium salt, and the preferred addition amount of the metal protectant is 0.1-3.0%.

[0027] Preferably, the bactericide is any one or a mixture of two or more of chloramphenicol and polyhexamethylene biguanide. The preferred addition amount of the bactericide is 0.1-1.0%.

[0028] Preferably, the other components are fragrances or colorants.

[0029] The method for preparing the above-described liquid dishwasher tub cleaner with a dual-phase appearance is characterized by comprising the following steps:

[0030] (1) First, add the metal protectant and alkaline dirt cleaner to the softened water and stir to disperse until a clear and transparent solution is obtained.

[0031] (2) Add the bactericide to the solution and stir until a homogeneous solution is formed.

[0032] (3) Add the low-foaming isomeric fatty alcohol alkoxylate and the ethylene oxide / propane block copolymer surfactant to the solution and stir until fully dissolved.

[0033] (4) Add the fragrance, flavoring, and coloring to the solution and stir until fully dissolved. Take a sample for testing, and after passing the inspection, fill and package it to obtain the liquid dishwasher tub cleaner.

[0034] The above steps are the preferred feeding scheme of the present invention. Of course, the ingredients of the present invention are not limited to the above feeding order. The components in step (3) can also be prepared before step (2).

[0035] The dual-phase liquid dishwasher tub cleaner of the present invention has the following advantages and beneficial effects compared with the prior art:

[0036] 1) This invention patents a liquid dishwasher tub cleaner with a dual-phase appearance, suitable for cleaning dishwasher tubs. The patented low-foaming formula ensures that the dishwasher spray arms are not affected by foam and can achieve maximum impact effect, effectively breaking down and loosening the calcium soap grime and organic grime attached to the dishwasher tub walls.

[0037] 2) This invention patent employs a biphasic appearance formulation system, which exhibits significant differences in appearance and cleaning efficacy. The patented product can also achieve a transformation between biphasic and homogeneous appearances by adjusting the mass ratio of surfactants.

[0038] 3) The liquid dishwasher tub cleaner of this invention is more convenient to use. As a liquid product, it effectively avoids dust pollution caused by existing solid powder dishwasher tub cleaners during use, making it convenient and simple to use. Detailed Implementation

[0039] The following detailed description of the dual-phase liquid dishwasher tub cleaner of the present invention is provided through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0040] It should be noted again that in the table of the following examples, TO-3 is a low-foaming isomeric fatty alcohol alkoxylate surfactant, where 3 in TO-3 represents the value of X in the chemical formula, and PE6200 is an ethylene oxide / propane block copolymer surfactant.

[0041] Examples 1-4

[0042] According to the formulation contents in Table 1, liquid dishwasher tub cleaners for Examples 1-4 were prepared respectively. The preparation method is as follows: First, citric acid and sodium benzoate were added to soft water and stirred until fully dissolved. Then, chloramine was added and stirred until dissolved. Fragrance and pigment were added to the surfactant and stirred until a homogeneous and transparent liquid was obtained. Samples were taken for testing, and after passing the inspection, the liquid dishwasher tub cleaners were filled and packaged to obtain the liquid dishwasher tub cleaners.

[0043] Table 1. Formulation composition of liquid dishwasher tub cleaners in Examples 1-4

[0044]

[0045] Examples 5-8

[0046] According to the formulation contents in Table 2, the liquid dishwasher tub cleaners of Examples 5-8 were prepared respectively. The preparation method is as follows: First, lactic acid and citric acid were added to softened water and stirred evenly until fully dissolved. Then, polyhexamethylene biguanide was added and stirred evenly. TO-3 was added and stirred evenly. Finally, fragrance and pigment were added and stirred evenly to form a homogeneous liquid. Samples were taken for testing, and after passing the inspection, they were filled and packaged to obtain the liquid dishwasher tub cleaner.

[0047] Table 2. Formulation composition of the liquid dishwasher tub cleaners in Examples 5-8

[0048]

[0049] Examples 9-12

[0050] According to the formulation content in Table 3, the liquid dishwasher tub cleaners of Examples 9-12 were prepared respectively. The preparation method is as follows: First, citric acid and sodium benzoate were added to deionized water and stirred until fully dissolved. Then, bismuth subchloride and polyhexamethylene biguanide were added and stirred until well mixed. Surfactant PE6100 was added and stirred until well mixed. Finally, fragrance and coloring were added and stirred until a homogeneous liquid was formed. Samples were taken for testing, and after passing the inspection, the liquid dishwasher tub cleaners were filled and packaged to obtain the liquid dishwasher tub cleaners.

[0051] Table 3. Formulation composition of the liquid dishwasher tub cleaners in Examples 9-12

[0052]

[0053] To facilitate a better understanding of the above embodiments, corresponding comparative examples are provided as follows:

[0054] Comparative Examples 1-4

[0055] Prepare comparative examples 1 to 4 of liquid dishwasher tub cleaners according to the formula content in Table 4.

[0056] In terms of raw materials, the liquid washing machine tub cleaner formulas provided in Comparative Examples 1-4 do not contain surfactants.

[0057] Table 4 shows the formulation composition of liquid dishwasher tub cleaners used in Comparative Examples 1-4.

[0058]

[0059] Comparative Examples 5-8

[0060] Prepare comparative ratios 5 to 8 of liquid dishwasher tub cleaners according to the formulation contents in Table 5.

[0061] In terms of raw materials, the liquid washing machine tub cleaner formulas provided in Comparative Examples 5-8 do not contain acid detergents.

[0062] Table 5. Formulation composition of liquid dishwasher tub cleaners (Comparative Examples 5-8)

[0063]

[0064] Effect Application Test Case

[0065] The performance testing method for the cleaning agent according to embodiments of the present invention is as follows:

[0066] 1. Detergent power testing and evaluation methods

[0067] Test method: Prepare a certain concentration of sodium carbonate, calcium chloride, and calcium fatty acid stains, mix them to produce calcium and soap scum deposits, and then age these deposits firmly onto the surface of a test standard stain sheet to ensure the stains are firmly attached. Fix the prepared standard stain sheet to the dishwasher drum wall and clean it using the normal dishwasher cleaning program.

[0068] Method for evaluating detergency: Ten male and female volunteers (aged 22-55) were selected to conduct a sensory evaluation of the standard dirt strips in the rinsed dishwasher tub. The detergency was evaluated using the following five scores: 10 points, very clean; 8 points, relatively clean; 6 points, average; 4 points, poor; 0 points, no cleaning effect.

[0069] 2. Corrosion resistance test

[0070] Experimental Method: Corrosion resistance testing was conducted according to QB / T 2117 "General Water-Based Metal Detergents". The corrosion resistance of common dishwasher tub materials, stainless steel and PVC, was determined. Specific experimental requirements are as follows:

[0071] 1) Corrosion test on stainless steel surface

[0072] Prepare 200 ml of 0.4% liquid dishwasher tub cleaner solution in a 250 ml beaker. Add two metal test pieces of No. 45 steel (50 mm × 25 mm × 3~6 mm) to each beaker. Place the beaker in a constant temperature water bath at (65±2)℃ for 2 hours. Perform other operations according to the corrosion test method specified in QB / T 2117.

[0073] 2) Corrosion test on PVC

[0074] Prepare 200 ml of 0.4% liquid dishwasher tub cleaner solution in a 250 ml beaker, add two PVC pieces, and place the beaker in a constant temperature water bath at (65±2)℃ for 2 hours. Other operations are performed according to the corrosion test method specified in QB / T 2117.

[0075] 3. Quantitative bactericidal test

[0076] The quantitative bacterial kill test of the liquid dishwasher tub cleaner was conducted in accordance with the requirements of the Ministry of Health's "Disinfection Technical Specifications". The test bacteria were common Escherichia coli and Staphylococcus aureus. The bacterial kill rate of the liquid dishwasher tub cleaner was obtained under the following conditions: the test solution concentration was a diluted solution, the effective concentration was 1%, and the contact time was 20 minutes.

[0077] The test results are shown in Table 6.

[0078] Table 6 Test Results

[0079]

[0080] The liquid dishwasher tub cleaner of this invention is characterized by: effectively breaking down and loosening stubborn stains such as alkaline dirt, limescale, and rust adhering to the dishwasher tub walls through acidic cleaning, thereby effectively removing adhering calcium soap grime and organic scale, and is easy to use. It also provides corrosion inhibition protection, preventing damage to the dishwasher tub surface. Furthermore, it kills up to 99.9% of common bacteria in dishwasher tubs, and also has bactericidal and deodorizing effects.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A liquid dishwasher tank cleaner having a dual phase appearance characterized in that: Consists of the following raw material components by weight percentage: 10%~12% low-foaming isomeric fatty alcohol alkoxylate surfactant TO-3; 0.01%~0.5% ethylene oxide / propane block copolymer surfactant PE6200; 18%~20% alkaline soil cleaning agent; 0.1%~0.3% metal protection agent; 0.2%~0.3% bactericide; 0.1%~0.105% other components, which are fragrances, pigments; 66.895%~69.395% softened water; The alkaline soil cleaning agent is any one or a mixture of two or more of citric acid, lactic acid, tartaric acid, acetic acid.

2. The liquid dishwasher tank cleaner having a dual phase appearance according to claim 1, characterized in that: The metal protection agent is any one or a mixture of two of sodium benzoate, urea.

3. The liquid dishwasher tank cleaner having a dual phase appearance according to claim 1, characterized in that: The bactericide is any one or a mixture of two of cetylpyridinium chloride, polyhexamethylene biguanide.

4. A method for the preparation of a liquid dishwasher tank cleaner having a biphasic appearance according to any one of claims 1 to 3, characterized in that: Comprises the following steps, (1) First, the metal protection agent and the alkaline soil cleaning agent are added to the softened water, and stirred and dispersed to a clear transparent solution; (2) The bactericide is added to the solution of step (1) and stirred to a uniform solution; (3) The low-foaming isomeric fatty alcohol alkoxylate surfactant and the ethylene oxide / propane block copolymer surfactant are added to the solution of step (2) and stirred uniformly; (4) The fragrances and pigments are added to the solution of step (3) and stirred uniformly to complete dissolution; sampling is performed for inspection, and after passing the inspection, filling and packaging are performed, thereby obtaining the liquid dishwasher sink cleaner.

5. The method of claim 4, wherein: The components of step (3) can be prepared before step (2).

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