A method for preparing an emulsion type detergent for a dishwasher

Abstract

The present invention provides a method for preparing an emulsion type detergent for a dishwasher, comprising the following steps: S1) preparing formula components by mass percentage; S2) mechanically crushing the sodium percarbonate solid and performing surface modification; S3) injecting the measured deionized water into a mixing kettle, and then sequentially adding the remaining surfactant, co-surfactant, antibacterial deodorant, and chelating agent, heating and stirring evenly to form a stable emulsion; S4) when the system temperature of the emulsion drops below 30°C, adding the sodium percarbonate and biological enzyme treated in step S2); S5) adjusting the pH value to 6-8 to obtain a final product. The advantages of the present invention are: having both strong cleaning power and softening water quality, reducing scale residue in tableware and dishwasher cavity, and having antibacterial and deodorizing effects.

Description

Technical Field

[0001] The invention relates to the technical field of daily cleaning formulas, and in particular to a method for preparing an emulsion-type detergent for a dishwasher. Background Art

[0002] With the development of the times and the improvement of people's living standards, people's demand for dishwashers is increasing day by day, and they are becoming more and more functional, such as cleaning, drying, disinfection, storage, etc. With the widespread use of dishwashers in household life, the market development of dishwasher-specific detergents is also becoming increasingly hot.

[0003] The formula design of dishwasher-specific detergents on the market is more in line with the foreign cooking methods of frying, grilling and cold dishes. However, the residual stains left by heavy oil smoke and high-temperature cooking in my country, as well as the complex and diverse tableware, make it difficult for conventional dishwasher-specific detergents to thoroughly clean the tableware; on the other hand, water contains a large amount of calcium and magnesium ions, which easily form various inorganic or organic insoluble substances, such as calcium carbonate, calcium sulfate, and calcium soap, which adhere to the tableware to form water films or water marks, affecting the cleanliness of the tableware and easily accumulating into scale in the dishwasher.

[0004] Dishwasher-specific detergents include liquid, powder and solid blocks. Their mechanism of action is to use the high-temperature and high-pressure water flow generated by the dishwasher's rinse nozzle to spray detergent onto tableware from different angles, thereby generating greater friction on the tableware, quickly rinsing it, and decomposing the oil and food residue remaining on the tableware.

[0005] Patent document CN117660128A discloses "a powder-liquid dishwashing gel beads and a preparation method thereof". The gel beads are obtained by compounding alkaline salts, percarbonate acrylic polymers, surfactants, and detergent aids in the powder cavity with synergists, chelating agents, hexylene glycol, and water in the liquid cavity. The tension of the surfactant in the powder cavity is improved, thereby generating a synergistic effect, improving the permeability and wetting area of ​​the surfactant on the surface of tableware, and achieving the effect of strong stripping and removing stains. The powder-liquid composite cavity type dishwashing detergent provided by the invention should improve the cleaning effect by mixing and compounding the powder cavity and liquid cavity components, but due to the presence of its cavity membrane, the powder component and the liquid component are not mixed well during use, and the purpose of improving the cleaning effect cannot be achieved.

[0006] Patent document CN111117794A discloses "a preparation process of a composite dishwasher detergent", which is obtained by mixing and stirring a dishwashing liquid base liquid, detergent particles, carboxymethyl cellulose, liquid paraffin, sodium chloride, sorbitol, probiotics and fragrance. The dishwasher detergent provided by the present invention is prepared by improving the detergent base liquid, and adding 1-3 parts of calcium carbonate, 2-5 parts of sodium carbonate, 1-3 parts of aluminum silicate, 1-2 parts of sodium xylene sulfonate, 1-2 parts of white carbon black, 2-5 parts of zeolite powder and high-pressure calcined detergent particles such as swelling, and utilizing the impact of the detergent particles on surface stains to effectively and quickly remove stains. The composite dishwashing detergent uses detergent particles to enhance the cleaning effect, but the detergent particles contain water-insoluble components, which are easy to cause blockage of the water outlet and leave scale in the dishwasher after long-term use. Summary of the invention

[0007] The purpose of the present invention is to provide a method for preparing an emulsion type detergent for a dishwasher which has strong cleaning power, softens water quality, reduces scale residue in tableware and dishwasher cavity, and has antibacterial and deodorizing effects.

[0008] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0009] A method for preparing an emulsion-type detergent for a dishwasher comprises the following steps:

[0010] S1) preparing the formula components by mass percentage as follows: sodium percarbonate 20-40%, surfactant 3-10%, co-surfactant 2-5%, biological enzyme 0.5-1.5%, antibacterial deodorant 2-5%, chelating agent 5-10%, pH regulator 8-15%, and the balance is deionized water;

[0011] S2) mechanically crushing the sodium percarbonate solid, and uniformly mixing one third of the surfactant with the crushed sodium percarbonate to perform surface modification to improve the stability of the sodium percarbonate in the emulsion;

[0012] S3) adding the measured deionized water into a mixing kettle, and then sequentially adding the remaining surfactant, co-surfactant, antibacterial deodorant, and chelating agent, heating to 50-60° C., stirring and mixing evenly, to prepare a stable emulsion;

[0013] S4) When the temperature of the emulsion system drops below 30° C., the sodium percarbonate and biological enzyme treated in step S2) are added, and the mixture is slowly shaken in a horizontal shaking bed to uniformly disperse the sodium percarbonate in the emulsion;

[0014] S5) adding a pH regulator to adjust the pH value of the emulsion to 6-8 to obtain the final product.

[0015] Furthermore, in step S1), the active oxygen content of the un-crushed sodium percarbonate solid is ≥10%, the thermal stability value is ≥90%, and the wet stability value is ≥60%.

[0016] Furthermore, in step S2), the particle size of the treated sodium percarbonate is 200-400 μm.

[0017] Further, in step S3), the surfactant is one or more of alkyl glucoside, coconut oil fatty acid diethanolamide, cocamide betaine, monolauryl phosphate MAP, sulfobetaine, and lauramidopropyl hydroxysulfobetaine (LHSB-35). The above surfactants are green and environmentally friendly, and have good cleaning and emulsification effects.

[0018] Furthermore, in step S3), the co-surfactant is one or two of fatty alcohol polyoxyethylene ethers (such as AEO3, AEO9) or EO / PO block polyethers, and its degree of polymerization n value is 6-15. The above co-surfactant is conducive to the stable formation of the emulsion.

[0019] Furthermore, in step S3), the chelating agent is a compound of sodium polyepoxysuccinate (PESA) and one or both of tetrasodium glutamate diacetate or sodium methylglycine diacetate, and the compounding ratio is 1:2-3.

[0020] Furthermore, in step S3), the antibacterial deodorant is prepared by compounding zinc ricinoleate with one or two of dodecyl ammonium dichloride, hexadecyl trimethyl ammonium bromide or didecyl quaternary ammonium salt, and the compounding ratio is 1:1-3.

[0021] Furthermore, in step S4), the biological enzyme is two or more of lipase and alkaline protease or amylase; the biological enzyme needs to be added after the emulsion system is cooled to below 30°C to avoid inactivation of the biological enzyme due to excessively high temperature.

[0022] Furthermore, in step S4), the rotation speed of the horizontal shaking bed is 100-150 rpm, and the shaking time is 0.5-1.5 h, preferably 1 h.

[0023] Furthermore, in step S5), the pH adjuster is a compound of one or more of sodium citrate, sodium bicarbonate, tartaric acid, malic acid, citric acid or ascorbic acid.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention discloses a method for preparing an emulsion-type detergent for a dishwasher, which has both strong cleaning power and water softening effects, reduces scale residues in tableware and the cavity of the dishwasher, and has antibacterial and deodorizing effects. Specifically, the treated sodium percarbonate particles are evenly dispersed in the emulsion. During use, the sodium percarbonate particles can act as flushing friction particles at the moment of being sprayed into the dishwasher spray gun, flushing the stains on the tableware, and then dissolving in water, and decomposing and releasing active oxygen components, which can decompose and soften stains and oxidize sulfur-containing odorous gases. The friction of the materials and the enhanced activity of active oxygen effectively improve the cleaning effect; the formula of the present invention contains a PESA chelating agent, which can effectively chelate calcium ions in water, soften water quality, reduce the residues of stains in tableware after washing, and can also avoid the accumulation of scale in the dishwasher; the ricinoleic acid pungent component contained in the formula of the present invention can combine with the sulfur-containing odorous gas in the cavity of the dishwasher, avoid the accumulation of sulfur-containing odorous gas in the dishwasher, and provide users with a good cleaning experience. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in further detail below.

[0027] Example 1

[0028] First, 200 g of sodium percarbonate was mechanically crushed to a particle size of 200-400 μm, and 30 g of alkyl glucoside was added to modify the surface thereof.

[0029] Then, 455g of deionized water was added to the reactor, followed by 20g of cocamide betaine, 20g of coconut fatty acid diethanolamide and 30g of lauramide propyl hydroxysulfobetaine surfactant, 20g of EO / PO block polyether cosurfactant, 10g of zinc ricinoleate and 20g of dodecyl ammonium dichloride antibacterial deodorant, 25g of sodium polyepoxysuccinate (PESA) and 45g of tetrasodium glutamate diacetate chelating agent. The mixture was heated to 50°C and stirred evenly until a transparent liquid was obtained to prepare an emulsion.

[0030] Then, when the temperature of the emulsion drops below 30°C, the treated sodium percarbonate particles, 5g of alkaline protease, 5g of amylase and 5g of lipase enzyme preparation are added, and the mixture is shaken at a speed of 100 rpm for 1.5 hours in a horizontal shaking bed to evenly disperse the sodium percarbonate particles in the emulsion.

[0031] Finally, add 40g of sodium citrate and 20g of citric acid to adjust the pH value of the solution to between 6 and 8 to obtain the finished product.

[0032] Example 2

[0033] First, 300 g of sodium percarbonate was mechanically crushed to a particle size of 200-400 μm, and 30 g of monolauryl phosphate (MAP) was added to modify the surface.

[0034] Then, 390g of deionized water was added to the reactor, followed by 20g of sulfobetaine and 20g of lauramide propyl hydroxysulfobetaine (LHSB-35) surfactant emulsifiers, 30g of AEO9 cosurfactant, 20g of zinc ricinoleate and 30g of hexadecyltrimethylammonium bromide antibacterial deodorant, 18g of sodium polyepoxysuccinate (PESA) and 32g of sodium methylglycine diacetate chelating agent, etc. The mixture was heated to 60°C and stirred evenly until the mixture was clear and transparent to prepare an emulsion.

[0035] Then, when the temperature of the emulsion drops below 30°C, the treated sodium percarbonate particles, 5g of alkaline protease and 5g of amylase are added, and the mixture is shaken at a speed of 120 rpm for 1 hour in a horizontal shaking bed to evenly disperse the sodium percarbonate particles in the emulsion.

[0036] Finally, add 20g of sodium bicarbonate, 10g of citric acid, 10g of malic acid and 10g of tartaric acid to adjust the pH value of the solution to between 6 and 8 to obtain the finished product.

[0037] Example 3

[0038] First, 300 g of sodium percarbonate was mechanically crushed to a particle size of 200-400 μm, and 30 g of monolauryl phosphate (MAP) was added to modify the surface.

[0039] Then, 390g of deionized water was added to the reactor, followed by 20g of sulfobetaine and 20g of lauramide propyl hydroxysulfobetaine (LHSB-35) surfactant emulsifiers, 30g of AEO9 cosurfactant, 20g of zinc ricinoleate and 30g of hexadecyltrimethylammonium bromide antibacterial deodorant, 32g of sodium methylglycine diacetate chelating agent, etc. The mixture was heated to 60°C and stirred evenly until the mixture was clear and transparent to prepare an emulsion.

[0040] Then, when the temperature of the emulsion drops below 30°C, the treated sodium percarbonate particles, 5g of alkaline protease and 5g of amylase are added, and the mixture is shaken at a speed of 120 rpm for 1 hour in a horizontal shaking bed to evenly disperse the sodium percarbonate particles in the emulsion.

[0041] Finally, add 20g of sodium bicarbonate, 10g of citric acid, 10g of malic acid and 10g of tartaric acid to adjust the pH value of the solution to between 6 and 8 to obtain the finished product.

[0042] Example 4

[0043] First, 300 g of sodium percarbonate was mechanically crushed to a particle size of 200 to 400 μm.

[0044] Then, 30g of monolauryl phosphate (MAP), 20g of sulfobetaine and 20g of lauramidopropyl hydroxysulfobetaine (LHSB-35) surfactant emulsifiers were added in sequence; 30g of AEO9 co-surfactant; 20g of zinc ricinoleate and 30g of cetyltrimethylammonium bromide antibacterial and deodorizing agents; 32g of sodium methylglycine diacetate chelating agent; 5g of alkaline protease and 5g of fixed powder enzyme preparation; 20g of sodium bicarbonate and 10g of citric acid, 10g of malic acid and 10g of tartaric acid pH adjusters were blended, and the modified sodium percarbonate powdered detergent after uniform mixing was used for cleaning test comparison experiments.

[0045] In summary, the composition ratios of the components for preparing the sodium percarbonate products in Examples 1 to 4 are shown in Table 1. In Example 3, no chelating agent is added; Example 4 is a comparative example, and powdered sodium percarbonate is used as a cleaning agent.

[0046] Table 1

[0047] Components (by mass percentage) Implementation 1 Implementation 2 Implementation 3 Implementation 4 Sodium Percarbonate 20 30 30 30 Surfactants 10 7 7 7 Co-surfactant 5 3 3 3 Biological enzyme 1.5 1 1 1 Antibacterial deodorant 3 5 5 5 Chelating agents 7 5 - 5 pH Adjusters 8 10 10 10 Deionized water 45.5 39 44 -

[0048] The cleaning effect of the sodium percarbonate products obtained in Examples 1 to 4 was tested. The test method is as follows:

[0049] (1) Decontamination rate test method

[0050] First, measure the weight of a piece of tableware m0, then smear the stains all over the inside of the tableware, and measure the mass as m1. Finally, measure the weight of the washed and dried tableware for the third time and count it as m2. The calculation formula for the decontamination rate is as follows:

[0051] Decontamination rate = (m1-m2) / (m1-m0).

[0052] (2) Antibacterial rate test method

[0053] According to the requirements of "Evaluation Method for Antibacterial and Antimicrobial Effect of Daily Chemical Products" QB / T2738-2012, the finished products of each embodiment were rapidly evaluated for their antibacterial effects.

[0054] (3) Odor removal rate in dishwasher

[0055] First, the total concentration C1 of odorous substances in dishwashing detergent, such as hydrogen sulfide and amine stains, is detected. After the dishes are washed, the concentration of odorous substances in the dishwashing detergent is measured again as C2. The removal rate of odorous substances in the dishwasher = (C1-C2) / C1.

[0056] Thus, a comparison of the cleaning effects of Examples 1 to 4 is obtained.

[0057] The decontamination rate of Example 3 without adding a chelating agent is reduced; while the decontamination rate of Example 4 using powdered sodium percarbonate as a cleaning agent is greatly reduced. Moreover, the sterilization rate is greatly reduced by using the cleaning agent of Example 4, and the deodorization rate is also reduced.

[0058] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for preparing an emulsion-type detergent for a dishwasher, characterized in that The steps include: S1) Prepare the formula components by mass percentage as follows: sodium percarbonate 20-40%, surfactant 3-10%, Co-surfactant 2-5%, biological enzyme 0.5-1.5%, antibacterial deodorant 2-5%, chelating agent 5-10%, pH adjuster 8-15%, the balance is deionized water; S2) mechanically crushing the sodium percarbonate solid, and uniformly mixing one third of the surfactant with the crushed sodium percarbonate to perform surface modification, so as to improve the stability of the sodium percarbonate in the emulsion; S3) Pour the measured deionized water into a mixing kettle, then add the remaining surfactant, co-surfactant, antibacterial deodorant, and chelating agent in sequence, raise the temperature to 50-60°C, stir and mix evenly, and prepare a stable emulsion; S4) When the temperature of the emulsion system drops below 30° C., the sodium percarbonate and biological enzyme treated in step S2) are added, and the mixture is slowly shaken in a horizontal shaking bed to uniformly disperse the sodium percarbonate in the emulsion; S5) adding a pH regulator to adjust the pH value of the emulsion to 6-8 to obtain the final product.

2. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S1), the active oxygen content of the un-crushed sodium percarbonate solid is ≥10%, the thermal stability value is ≥90%, and the wet stability value is ≥60%.

3. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S2), the particle size of the treated sodium percarbonate is 200-400 μm.

4. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S3), the chelating agent is a compound of sodium polyepoxysuccinate (PESA) and one or both of tetrasodium glutamate diacetate or sodium methylglycine diacetate, and the compounding ratio is 1:2-3.

5. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S3), the antibacterial deodorant is prepared by mixing zinc ricinoleate with one or two of dodecyl ammonium dichloride, hexadecyl trimethyl ammonium bromide or didecyl quaternary ammonium salt, and the mixing ratio is 1:1-3.

6. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S4), the biological enzyme is two or more of lipase and alkaline protease or amylase.

7. The method for preparing an emulsion-type detergent for a dishwasher according to claim 1, characterized in that: In step S5), the pH adjuster is a compound of one or more of sodium citrate, sodium bicarbonate, tartaric acid, malic acid, citric acid or ascorbic acid.