Highly efficient heavy oil cleaning agent and its preparation method

Abstract

The application discloses a high-efficiency heavy oil cleaning agent and a preparation method thereof, and belongs to the technical field of detergent compositions. The application comprises the following components in parts by weight: sodium lauryl polyoxyethylene ether sulfate 9.4-12.6 parts, octylphenol polyoxyethylene ether 3.5-5.0 parts, sodium hydroxide 0.5-0.8 parts, sodium gluconate 1.1-1.4 parts, triethanolamine 0.4-1.6 parts, sodium p-toluene sulfonate 0.7-2.2 parts, sodium carboxymethyl cellulose 2.4-4.0 parts, amphoteric deoiling synergist 0.8-1.4 parts, essence 0.1-0.3 parts, pigment 0.1-0.3 parts, and water 45-75 parts. The application can effectively weaken the interaction between molecular chains of heavy oil stains, reduce the cross-linking degree and hardness of the heavy oil stains, and achieve the effect of efficiently removing stubborn heavy oil stains.

Description

Technical Field

[0001] This invention relates to the field of detergent composition technology, and in particular to a highly efficient heavy oil stain cleaner and its preparation method. Background Technology

[0002] Oil stains are a common household stain, and the kitchen is a common area where oil stains accumulate. During daily cooking, cooking oil evaporates and oxidizes at high temperatures, forming cross-linked grease. Grease is essentially a polymer that is difficult to dissolve in water. Layers of grease absorb impurities from the environment and aggregate together, eventually forming a highly adhesive and viscous substance that severely affects environmental hygiene and aesthetics.

[0003] Using detergents containing surfactants to clean oil stains is a common method. Chinese patent CN102899193A discloses a new type of environmentally friendly and efficient oil stain cleaner and its preparation method. The cleaner includes the following components in parts by weight: 20-65 parts of waste silica slag, 1-50 parts of surfactant, and 0-76 parts of water. The oil stain cleaner of this invention is mainly made from solid waste slag generated during the production of inorganic silica gel, which is then compounded with detergents such as surfactants. The main features of this invention are: (1) the main component is inorganic silica, which is odorless, does not volatilize organic solvents, is non-toxic and non-polluting, and has a low cost; (2) it removes stubborn oil stains and gel-like oil stains quickly; (3) it has a wide range of uses; and (4) it cleans thoroughly, leaving the surface of the object as clean as new after treatment. Moreover, for silica gel companies, the use of waste silica slag to make cleaners achieves the goal of turning waste into treasure, developing a circular economy, and reducing waste emissions, which has good economic and social benefits. In practical use, heavy oil stains often exhibit characteristics such as high degree of cross-linking, high viscosity, and high hardness. The cleaning agent prepared by the above patent can remove relatively fresh oil stains, but it is difficult to effectively combine with heavy oil stains, making it difficult for surfactants to play an efficient degreasing role.

[0004] To reduce the hardness of heavy grease and facilitate the binding of surfactants with the grease, some cleaning agents add grease softeners to address this issue. Chinese Patent CN106635456A provides a kitchen grease cleaner and its preparation method. The kitchen grease cleaner, by mass percentage, is prepared from raw materials comprising the following components: 0.1–1.0% polyacrylic acid copolymer, 1.0–15.0% surfactant, 1.0–20.0% grease softener, 0.1–15.0% grease hydrolysate, 0.1–5.0% bactericide, 0.1–2.0% additives, with the balance being deionized water. This invention's kitchen grease cleaner can remain on vertical surfaces for more than 1 minute, prolonging the interaction time between the cleaner and dirt and improving cleaning effectiveness. The kitchen cleaner of this invention has a larger spray particle size, reducing atomization and minimizing irritating odors and inhalation. The kitchen cleaner of this invention has a kill rate of ≥99.9% against Escherichia coli and Staphylococcus aureus, achieving both grease removal and sterilization effects. However, the oil softener used in this invention is an ether or alcohol compound with a relatively simple function; while the polymer molecules in heavy oil stains have large molecular weights and complex structures, including but not limited to hydrogen bonding, van der Waals forces, and π-π stacking of aromatic rings. Therefore, simple oil softeners are difficult to reduce the hardness of oil stains in all aspects, which may cause technical problems of incomplete decontamination. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the problem to be solved by the present invention is to provide a cleaning agent that can efficiently remove heavy oil stains and a method for preparing the same.

[0006] Heavy oil stains contain a variety of impurities, resulting in a highly complex composition and structure. They often contain aromatic condensation rings, alkyl branches, and heterocyclic structures. Especially oil stains formed over many years have large molecular weights, high degrees of cross-linking, and extremely hard surfaces, making them difficult to remove with ordinary surfactants and single softeners. Therefore, weakening the interactions between the molecular chains of heavy oil stains is key to effectively removing stubborn stains.

[0007] A highly effective heavy-duty oil stain cleaner, comprising the following ingredients in parts by weight:

[0008] Sodium lauryl polyoxyethylene ether sulfate 9.4–12.6 parts, octylphenol polyoxyethylene ether 3.5–5.0 parts, sodium hydroxide 0.5–0.8 parts, sodium gluconate 1.1–1.4 parts, triethanolamine 0.4–1.6 parts, sodium p-toluenesulfonate 0.7–2.2 parts, sodium carboxymethyl cellulose 2.4–4.0 parts, amphoteric degreasing synergist 0.8–1.4 parts, fragrance 0.1–0.3 parts, pigment 0.1–0.3 parts, water 45–75 parts.

[0009] Preferably, the active ingredient content of the sodium lauryl ether sulfate is 68-72 wt%.

[0010] This invention prepares and uses an amphoteric degreasing synergist. First, 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one is reacted with isocyanate methyl methacrylate to obtain an active monomer. Then, the active monomer is combined with 4-acryloylmorpholine, maleic anhydride, and N,N-dimethylacrylamide through a polymerization reaction. Finally, the mixture is treated with an aqueous sodium hydroxide solution to obtain the amphoteric degreasing synergist.

[0011] Preferably, the preparation method of the amphoteric degreasing synergist is as follows:

[0012] M1. Mix 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with dimethyl sulfoxide until homogeneous, then heat the mixture. After the heat treatment, cool the mixture to 25-35°C, add isocyanate methacrylate, and carry out an addition reaction at this temperature. After the addition reaction is complete, pour the product into cold acetone for precipitation, filter and collect the filter cake. Wash the filter cake with acetone and dry it to obtain the active monomer for later use.

[0013] M2. Take the active monomer, 4-acryloylmorpholine, maleic anhydride, N,N-dimethylacrylamide and water and mix them evenly. Then add the initiator and carry out the polymerization reaction under anaerobic conditions. After the polymerization reaction is completed, the polymerization product is obtained and set aside for later use.

[0014] M3. Add sodium hydroxide aqueous solution to the polymerization product, mix evenly and let stand; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0015] Specifically, the preparation method of the amphoteric degreasing synergist is as follows, in parts by weight:

[0016] M1. Mix 1.8–2.3 parts of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55–75 parts of dimethyl sulfoxide until homogeneous, then heat the mixture. After the heat treatment, cool the mixture to 25–35°C, add 2.2–2.9 parts of isocyanate methacrylate, and carry out an addition reaction at this temperature. After the addition reaction, pour the product into 50–100 parts of acetone at 0–4°C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use.

[0017] M2, separately take 3.85-5.00 parts of the aforementioned active monomer, 1.95-2.60 parts of 4-acryloylmorpholine, 1.35-1.75 parts of maleic anhydride, 0.95-1.35 parts of N,N-dimethylacrylamide, and 50-75 parts of water, mix them evenly, then add 0.05-0.20 parts of ammonium persulfate and carry out the polymerization reaction under anaerobic conditions; after the polymerization reaction is completed, the polymerization product is obtained and set aside for later use;

[0018] M3. Add 6.5 to 9.0 parts of sodium hydroxide aqueous solution to the polymerization product, mix evenly and let stand; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0019] Preferably, the heating treatment temperature in step M1 is 145-160°C, and the treatment time is 0.5-2 hours.

[0020] Preferably, the addition reaction in step M1 takes 1.5 to 4 hours.

[0021] Preferably, the polymerization reaction in step M2 is carried out at a temperature of 45–60°C and for a reaction time of 1.5–4 hours.

[0022] Preferably, the concentration of the sodium hydroxide aqueous solution in step M3 is 0.5–1.0 mol / L, and the settling time is 0.5–2 h.

[0023] Amphoteric degreasing synergists reduce the degree of cross-linking and hardness of heavy oil stains by weakening the internal molecular interactions. Reduced intermolecular interactions and increased spacing in the stacked structures allow surfactants to bind more effectively. In amphoteric degreasing synergists, the nitrogen atoms provided by the active monomer and 4-acryloylmorpholine can participate in hydrogen bond formation. The pyrimidine ring structure of the active monomer can form intramolecular and intermolecular hydrogen bond interactions. When amphoteric degreasing synergists bind to heavy oil stains, they can penetrate into the layered polymers of the oil stains and aggregate with them through hydrogen bond interactions, thereby reorganizing and weakening the hydrogen bond interactions between oil stain molecular chains and the π-π stacking of aromatic rings.

[0024] The N,N-dimethylacrylamide segment in the molecular structure of the amphoteric degreasing synergist exhibits strong affinity for oil polymers, enhancing its binding performance with oil while also preventing the re-aggregation of oil molecules. The dicarboxyl groups formed after the ring-opening polymerization of maleic anhydride are converted into sodium carboxylate groups in the presence of sodium hydroxide, increasing the synergist's hydrophilicity. Due to the synergistic effect, the oil is emulsified into small droplets, reducing surface cross-linking and hardness, thus facilitating the effective removal of heavy oil stains.

[0025] This invention also discloses a method for preparing a highly efficient heavy oil stain cleaner, comprising the following steps:

[0026] S1. Prepare raw materials according to the formula ratio, and mix the raw materials by stirring until the components are evenly dispersed to obtain a mixture;

[0027] S2. After the mixture is allowed to stand, it is filtered to remove impurities and the filtrate is collected. The filtrate is then bottled and packaged to obtain a high-efficiency heavy oil stain cleaner.

[0028] Preferably, the stirring rate in step S1 is 180–480 rpm and the stirring time is 15–60 min.

[0029] Preferably, the settling time in step S2 is 1 to 3 hours, and the standard mesh size of the filter screen is 230 to 325 mesh.

[0030] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0031] The descriptions and functions of some of the raw materials in the formula of this invention are as follows:

[0032] Sodium lauryl ether sulfate (SLES): A chemical raw material commonly used in detergents and textiles. It possesses excellent foaming properties and serves as a cleaning agent, biodegradable surfactant, and effectively resists hard water while being gentle on the skin. SLES is frequently used in the production of shampoos, shower gels, dishwashing liquids, and compound soaps. In the textile industry, it is also commonly used as a wetting and clarifying agent.

[0033] Octylphenol polyoxyethylene ether: A chemical raw material with good emulsifying, dispersing, and antistatic properties. It can form a thin film on the surface of fruits and vegetables, has antibacterial properties, and plays a protective and preservative role. It is non-toxic and harmless to the human body.

[0034] Sodium gluconate: an organic compound with the chemical formula C6H. 11 Sodium iodide (NaO7) has a wide range of industrial applications. It can be used as a highly efficient chelating agent in industries such as construction, textile printing and dyeing, metal surface treatment, and water treatment. It is also used as a steel surface cleaning agent, a glass bottle cleaning agent, and an aluminum oxide coloring agent in the electroplating industry. In the concrete industry, it is used as a highly efficient retarder and a highly efficient water-reducing agent.

[0035] Sodium p-toluenesulfonate: a white, crystalline powder, readily soluble in water. It is generally prepared by toluene sulfonation followed by neutralization with an alkali. It is mainly used as a conditioning agent in the synthesis of detergents, a co-solvent, and as an intermediate in pharmaceutical synthesis.

[0036] Sodium carboxymethyl cellulose: An organic compound widely used in petroleum industry drilling mud treatment agents, synthetic detergents, organic detergent builder, textile printing and dyeing sizing agents, water-soluble colloidal thickeners for daily chemical products, thickeners and emulsifiers for the pharmaceutical industry, thickeners for the food industry, adhesives for the ceramic industry, industrial pastes, and sizing agents for the paper industry.

[0037] The beneficial effects of this invention are:

[0038] Compared to existing technologies, this invention reduces the degree of cross-linking and hardness of heavy oil stains by weakening the internal molecular interactions. The reduced interactions between oil stain molecules and the increased spacing of the stacked structures allow surfactants to bind to them more effectively, resulting in superior cleaning performance.

[0039] Compared with the prior art, the present invention prepares and uses an amphoteric degreasing synergist. The active monomer is obtained by reacting 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with isocyanate methacrylate. The active monomer is then combined with 4-acryloylmorpholine, maleic anhydride and N,N-dimethylacrylamide through a polymerization reaction. Finally, the mixture is treated with an aqueous sodium hydroxide solution to obtain the amphoteric degreasing synergist.

[0040] Compared to existing technologies, the amphoteric degreasing synergist used in this invention has a strong affinity for oil polymers in its N,N-dimethylacrylamide segment, which not only enhances the binding performance with oil but also helps prevent the re-aggregation of oil molecules. The dicarboxyl group formed after the ring-opening polymerization of maleic anhydride is converted into a sodium carboxylate group in the presence of sodium hydroxide, which improves the hydrophilicity of the synergist. Because the synergist of this invention exhibits amphiphilicity, the oil is emulsified into small droplets, which is more conducive to the effective removal of heavy oil stains. Detailed Implementation

[0041] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0042] The following are some raw material parameters in the comparative examples and embodiments of the present invention:

[0043] Sodium lauryl polyoxyethylene ether sulfate, active ingredient content: 70wt%, CAS No.: 68585-34-2, provided by Jinan Wandefeng Environmental Protection Technology Co., Ltd.

[0044] Octylphenol polyoxyethylene ether, CAS No.: 9036-19-5, provided by Shandong Shengxu Energy Co., Ltd.

[0045] Sodium carboxymethyl cellulose, product number: S851013, provided by Shanghai Hongshun Biotechnology Co., Ltd.

[0046] Lemon flavoring, daily chemical grade, item number: LY-5203, provided by Guangzhou Leyin Fragrance & Flavor Co., Ltd.

[0047] Yellow pigment-37, CAS No.: 144190-25-0, provided by Hubei Handafei Biotechnology Co., Ltd.

[0048] 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one, CAS No.: 5993-90-8, provided by Jiangsu Aikon Biomedical R&D Co., Ltd.

[0049] Ethyl isocyanate methacrylate, CAS No.: 30674-80-7, provided by Shanghai Mairui Biochemical Technology Co., Ltd.

[0050] 4-Acryloylmorpholine, CAS No.: 5117-12-4, provided by Hubei Shixing Chemical Co., Ltd.

[0051] Example 1

[0052] A highly efficient heavy-duty oil stain cleaner is prepared using the following method:

[0053] S1. Prepare the following ingredients according to the formula: 9.4 kg sodium lauryl polyoxyethylene ether sulfate, 3.5 kg octylphenol polyoxyethylene ether, 0.5 kg sodium hydroxide, 1.1 kg sodium gluconate, 0.4 kg triethanolamine, 0.7 kg sodium p-toluenesulfonate, 2.4 kg sodium carboxymethyl cellulose, 1.1 kg amphoteric degreasing synergist, 0.1 kg lemon flavoring, 0.1 kg yellow pigment-37, and 45 kg water. Stir the above raw materials at 360 rpm for 30 minutes until all components are evenly dispersed to obtain a mixture.

[0054] S2. After the mixture is left to stand for 2 hours, it is filtered to remove impurities. The standard mesh size of the filter screen is 325 mesh. The filtrate is collected. The filtrate is bottled and packaged to obtain a high-efficiency heavy oil stain cleaner.

[0055] The preparation method of the amphoteric degreasing synergist is as follows:

[0056] M1. Mix 1.8 kg of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55 kg of dimethyl sulfoxide until homogeneous, then heat the mixture at 145 °C for 1 h. After the heat treatment, cool the mixture to 30 °C, add 2.2 kg of isocyanate methacrylate, and carry out an addition reaction at this temperature for 3 h. After the addition reaction, pour the product into 75 kg of acetone at 0 °C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use.

[0057] M2, separately take 3.85 kg of the aforementioned active monomer, 1.95 kg of 4-acryloylmorpholine, 1.35 kg of maleic anhydride, 0.95 kg of N,N-dimethylacrylamide, and 50 kg of water, mix them evenly, then add 0.05 kg of ammonium persulfate and carry out the polymerization reaction under nitrogen protection at a temperature of 55°C for 2.5 h; after the polymerization reaction is completed, the polymerization product is obtained and set aside for later use;

[0058] M3. Add 6.5 kg of 0.5 mol / L sodium hydroxide aqueous solution to the polymerization product, mix well and let stand for 1 hour; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0059] Example 2

[0060] The preparation method of the heavy-duty and high-efficiency heavy oil stain cleaner in this embodiment is basically the same as that in Example 1. The only difference is that the preparation method of the amphoteric degreasing synergist is different.

[0061] The amphoteric degreasing synergist is prepared by the following method:

[0062] M1. Mix 1.8 kg of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55 kg of dimethyl sulfoxide until homogeneous, then heat the mixture at 145 °C for 1 h. After the heat treatment, cool the mixture to 30 °C, add 2.2 kg of isocyanate methacrylate, and carry out an addition reaction at this temperature for 3 h. After the addition reaction, pour the product into 75 kg of acetone at 0 °C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use.

[0063] M2, separately take 3.85 kg of the active monomer, 1.95 kg of 4-acryloylmorpholine, 1.35 kg of maleic anhydride and 50 kg of water and mix them evenly. Then add 0.05 kg of ammonium persulfate and carry out the polymerization reaction under nitrogen protection. The polymerization reaction temperature is 55℃ and the reaction time is 2.5 h. After the polymerization reaction is completed, the polymerization product is obtained and set aside for later use.

[0064] M3. Add 6.5 kg of 0.5 mol / L sodium hydroxide aqueous solution to the polymerization product, mix well and let stand for 1 hour; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0065] Example 3

[0066] The preparation method of the heavy-duty and high-efficiency heavy oil stain cleaner in this embodiment is basically the same as that in Example 1. The only difference is that the preparation method of the amphoteric degreasing synergist is different.

[0067] The amphoteric degreasing synergist is prepared by the following method:

[0068] M1. Mix 1.8 kg of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55 kg of dimethyl sulfoxide until homogeneous, then heat the mixture at 145 °C for 1 h. After the heat treatment, cool the mixture to 30 °C, add 2.2 kg of isocyanate methacrylate, and carry out an addition reaction at this temperature for 3 h. After the addition reaction, pour the product into 75 kg of acetone at 0 °C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use.

[0069] M2, separately take 3.85 kg of the active monomer, 1.95 kg of 4-acryloylmorpholine, 0.95 kg of N,N-dimethylacrylamide and 50 kg of water and mix them evenly. Then add 0.05 kg of ammonium persulfate and carry out the polymerization reaction under nitrogen protection. The polymerization reaction temperature is 55℃ and the reaction time is 2.5 h. After the polymerization reaction is completed, the product is freeze-dried, washed with anhydrous ethanol, dried and ground into powder to obtain the amphoteric degreasing synergist.

[0070] Example 4

[0071] The preparation method of the heavy-duty and high-efficiency heavy oil stain cleaner in this embodiment is basically the same as that in Example 1. The only difference is that the preparation method of the amphoteric degreasing synergist is different.

[0072] The amphoteric degreasing synergist is prepared by the following method:

[0073] M1. Mix 1.8 kg of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55 kg of dimethyl sulfoxide until homogeneous, then heat the mixture at 145 °C for 1 h. After the heat treatment, cool the mixture to 30 °C, add 2.2 kg of isocyanate methacrylate, and carry out an addition reaction at this temperature for 3 h. After the addition reaction, pour the product into 75 kg of acetone at 0 °C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use.

[0074] M2, separately take 3.85 kg of the aforementioned active monomer, 1.35 kg of maleic anhydride, 0.95 kg of N,N-dimethylacrylamide and 50 kg of water and mix them evenly. Then add 0.05 kg of ammonium persulfate and carry out the polymerization reaction under nitrogen protection. The polymerization reaction temperature is 55℃ and the reaction time is 2.5 h. After the polymerization reaction is completed, the polymerization product is obtained and set aside for later use.

[0075] M3. Add 6.5 kg of 0.5 mol / L sodium hydroxide aqueous solution to the polymerization product, mix well and let stand for 1 hour; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0076] Example 5

[0077] The preparation method of the heavy-duty and high-efficiency heavy oil stain cleaner in this embodiment is basically the same as that in Example 1. The only difference is that the preparation method of the amphoteric degreasing synergist is different.

[0078] The amphoteric degreasing synergist is prepared by the following method:

[0079] M1. Mix 1.95 kg of 4-acryloylmorpholine, 1.35 kg of maleic anhydride, 0.95 kg of N,N-dimethylacrylamide with 50 kg of water until homogeneous. Then add 0.05 kg of ammonium persulfate and carry out the polymerization reaction under nitrogen protection. The polymerization temperature is 55℃ and the reaction time is 2.5 h. After the polymerization reaction is completed, the polymerization product is obtained and set aside for later use.

[0080] M2. Add 6.5 kg of 0.5 mol / L sodium hydroxide aqueous solution to the polymerization product, mix well and let stand for 1 hour; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

[0081] Compare with Example 1

[0082] A highly efficient heavy-duty oil stain cleaner is prepared using the following method:

[0083] S1. Prepare 9.4 kg sodium lauryl polyoxyethylene ether sulfate, 3.5 kg octylphenol polyoxyethylene ether, 0.5 kg sodium hydroxide, 1.1 kg sodium gluconate, 0.4 kg triethanolamine, 0.7 kg sodium p-toluenesulfonate, 2.4 kg sodium carboxymethyl cellulose, 0.1 kg lemon flavoring, 0.1 kg yellow pigment-37, and 45 kg water according to the formula ratio; stir the above raw materials at a speed of 360 rpm for 30 min, and mix until the components are evenly dispersed to obtain a mixture;

[0084] S2. After the mixture is left to stand for 2 hours, it is filtered to remove impurities. The standard mesh size of the filter screen is 325 mesh. The filtrate is collected. The filtrate is bottled and packaged to obtain a high-efficiency heavy oil stain cleaner.

[0085] Test Example 1

[0086] The detergency test of the high-efficiency heavy-duty oil stain cleaner was conducted in accordance with the specific methods and procedures in the national quality inspection standard QB / T4348-2012 "Kitchen Grease Cleaner".

[0087] In the detergency test, the formula for the artificial stain was as follows: 64.0g soybean oil, 8.0g ammonia-free caramel coloring, 12.0g wheat flour, 8.0g lard, 8.0g butter, and 2.4g glyceryl monostearate. The soybean oil, butter, lard, and glyceryl monostearate were weighed into a 250mL plastic beaker and dissolved in a water bath at 50℃. While stirring, the mixture was cooled to 30℃, then the ammonia-free caramel coloring was added. The mixture was stirred at at least 1000 rpm for 30 minutes until emulsified evenly. The wheat flour was then added, and the mixture was stirred for another 10 minutes. The mixture was aged for 24 hours and stored in the refrigerator. Before use, the temperature was restored to 25℃.

[0088] The preparation method of the staining sample is as follows: Wash the sample, dry it in an oven at 120℃ for 1 hour, then cool it in a desiccator for 30 minutes and weigh it. Apply artificial dirt to a designated area on one side of the sample using a brush. The dirt mass should be controlled at 0.25g / slice. After coating, place it on a dry ceramic plate M1 and dry it in an oven at 200℃ for 10 minutes. After cooling for 20 minutes, place it on a small ceramic plate, then place the small ceramic plate on ceramic plate M2, and put the whole thing into a UV constant temperature aging chamber preheated to 45℃. After irradiating with UV lamps for 1.5 hours, turn off the UV lamps, quickly rotate the sample diagonally to ensure uniform aging, and then turn on the UV lamps again for 1.5 hours. Remove the staining sample and place it in a petri dish, then dry and age it in a desiccator for 20-22 hours. The UV lamp designation is UV-A.

[0089] During the test, 200g of the high-efficiency heavy oil stain cleaner sample prepared in each example was weighed into a glass beaker and preheated to 35°C in a water bath. The prepared test specimens were weighed and then clamped onto the washing rack of the washing machine, keeping them vertical. Six beakers were used for each sample, with one specimen suspended in each beaker. A stopwatch was used to time the process, allowing the oil stains to fully soak for 10 minutes, followed by 5 minutes of washing. Then, the sample beakers were cleaned, each with 210mL of water added at 35°C, and washed for 30 seconds. The specimens were removed and placed on a tray, dried in a 120°C oven for 45 minutes, then cooled in a desiccator for 30 minutes before weighing to calculate the detergency. The detergency is the mass fraction of oil stains removed (f), expressed as a percentage (%).

[0090]

[0091] In the formula, m0 is the mass of the test piece, g; m1 is the mass of the soiled piece before washing, g; and m2 is the mass of the soiled piece after washing, g. The detergency test results of the high-efficiency heavy oil stain cleaner are shown in Table 1.

[0092] Table 1:

[0093] Example 1 97.4 Example 2 92.6 Example 3 90.3 Example 4 95.1 Example 5 85.9 Compare with Example 1 81.7

[0094] The strength of detergency reflects the quality of a cleaning agent's detergency performance. As shown in Table 1, the high-efficiency heavy-duty oil stain cleaner of this invention has excellent detergency; the addition of an amphoteric degreasing synergist further increases the efficiency of oil stain removal, with Example 1 exhibiting the best detergency performance. This result may be due to the amphoteric degreasing synergist reducing the degree of cross-linking and hardness of heavy-duty oil stains by weakening the internal molecular interactions. Reduced intermolecular interactions and increased spacing between the stacked structures allow for a higher degree of surfactant binding. In the amphoteric degreasing synergist, the nitrogen atoms provided by the active monomer and 4-acryloylmorpholine can participate in hydrogen bond formation, and the pyrimidine ring structure of the active monomer can form intramolecular and intermolecular hydrogen bond interactions. When the amphoteric degreasing synergist binds to heavy-duty oil stains, it can penetrate into the layered polymer of the oil stains, aggregate with them through hydrogen bond interactions, thereby reorganizing and weakening the hydrogen bond interactions between oil stain molecular chains and the π-π stacking of aromatic rings.

[0095] The differences between the examples may be due to variations in the molecular chain structure of the amphoteric degreasing synergist. The N,N-dimethylacrylamide segment in the amphoteric degreasing synergist's molecular structure has a strong affinity for oil polymers, enhancing its binding performance to oil while also helping to prevent the re-aggregation of oil molecules. The dicarboxyl groups formed after the ring-opening polymerization of maleic anhydride are converted into sodium carboxylate groups in the presence of sodium hydroxide, increasing the synergist's hydrophilicity. Because the synergist exhibits amphiphilicity, the oil is emulsified into small droplets, reducing surface cross-linking and hardness, thus facilitating the effective removal of heavy oil stains.

[0096] Test Example 2

[0097] The corrosion test of the high-efficiency heavy-duty oil stain cleaner was conducted according to the specific methods and procedures in the national quality inspection standard QB / T4348-2012 "Kitchen Grease Cleaning Agent". According to section 4.7 of that standard, the corrosion amount was determined according to section 5.6 of QB / T 2117-1995, using 150 mL of the original sample solution and two pieces of hard aluminum (LY). 12 For the test piece, heat the solution in a water bath to 25℃ and soak for 30 minutes. Other operations are the same as specified in 5.6.4 of QB / T 2117-1995.

[0098] The corrosion amount X2 of the test piece is expressed in milligrams of its mass change and is calculated using the following formula:

[0099] X2=(m1-m2)×1000

[0100] In the formula, m1 is the mass of the sample before the corrosion test, in g; m2 is the mass of the sample after the corrosion test, in g. The corrosion test results of the high-efficiency heavy oil stain cleaner are shown in Table 2.

[0101] Table 2:

[0102]

[0103]

[0104] The corrosiveness of the high-efficiency heavy oil stain cleaner may be caused by sodium hydroxide in the formula. As can be seen from the above test results, the corrosiveness of the present invention is in the range of 25-35mg, which is less than the 100mg index in the above standard. Therefore, the corrosiveness of the present invention is low.

Claims

1. A highly efficient heavy-duty oil stain cleaner, characterized in that, The product comprises the following components in parts by weight: sodium lauryl polyoxyethylene ether sulfate 9.4-12.6 parts, octylphenol polyoxyethylene ether 3.5-5.0 parts, sodium hydroxide 0.5-0.8 parts, sodium gluconate 1.1-1.4 parts, triethanolamine 0.4-1.6 parts, sodium p-toluenesulfonate 0.7-2.2 parts, sodium carboxymethyl cellulose 2.4-4.0 parts, amphoteric degreasing synergist 0.8-1.4 parts, fragrance 0.1-0.3 parts, pigment 0.1-0.3 parts, and water 45-75 parts; The preparation method of the amphoteric degreasing synergist is as follows, in parts by weight: M1. Mix 1.8-2.3 parts of 2-(aminomethyl)-6-methylpyrimidin-4(3H)-one with 55-75 parts of dimethyl sulfoxide until homogeneous, then heat the mixture. After the heat treatment, cool the mixture to 25-35°C, add 2.2-2.9 parts of isocyanate methacrylate, and carry out an addition reaction at this temperature. After the addition reaction, pour the product into 50-100 parts of acetone at 0-4°C for precipitation. Collect the filter cake by filtration, wash the filter cake with acetone, and dry it to obtain the active monomer for later use. M2, separately take 3.85~5.00 parts of the aforementioned active monomer, 1.95~2.60 parts of 4-acryloylmorpholine, 1.35~1.75 parts of maleic anhydride, 0.95~1.35 parts of N,N-dimethylacrylamide, and 50~75 parts of water, mix them evenly, then add 0.05~0.20 parts of ammonium persulfate and carry out the polymerization reaction under anaerobic conditions; after the polymerization reaction is completed, the polymerization product is obtained and set aside for later use; M3. Add 6.5 to 9.0 parts of sodium hydroxide aqueous solution to the polymerization product, mix evenly and let stand; after treatment, freeze dry, wash with anhydrous ethanol, dry and grind into powder to obtain amphoteric degreasing synergist.

2. The high-efficiency heavy oil stain cleaner according to claim 1, characterized in that: The active ingredient content of the sodium lauryl polyoxyethylene ether sulfate is 68~72wt%.

3. The high-efficiency heavy oil stain cleaner according to claim 1, characterized in that: The heating treatment temperature in step M1 is 145~160℃, and the treatment time is 0.5~2h.

4. The high-efficiency heavy oil stain cleaner according to claim 1, characterized in that: The addition reaction in step M1 takes 1.5 to 4 hours.

5. The high-efficiency heavy oil stain cleaner according to claim 1, characterized in that: The polymerization reaction in step M2 is carried out at a temperature of 45-60°C for 1.5-4 hours.

6. The high-efficiency heavy oil stain cleaner according to claim 1, characterized in that: The concentration of the sodium hydroxide aqueous solution in step M3 is 0.5~1.0 mol / L, and the settling time is 0.5~2 h.

7. A method for preparing the high-efficiency heavy oil stain cleaner as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Prepare raw materials according to the formula ratio, and mix the raw materials by stirring until the components are evenly dispersed to obtain a mixture; S2. After the mixture is allowed to stand, it is filtered to remove impurities and the filtrate is collected. The filtrate is then bottled and packaged to obtain a high-efficiency heavy oil stain cleaner.

8. The method according to claim 7, characterized in that: The stirring rate in step S1 is 180~480 rpm, and the stirring time is 15~60 min.

9. The method according to claim 7, characterized in that: The settling time in step S2 is 1 to 3 hours, and the standard mesh size of the filter screen is 230 to 325 mesh.

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