A biobased degradable industrial degreasing cleaning agent and a preparation method thereof

Abstract

The application provides a kind of biobased degradable industrial degreasing cleaning agent and its preparation method, it is related to the field of industrial degreasing cleaning agent, it includes biobased wetting penetration component, biological emulsification curling core component, natural plant solubilization component, non-phosphorus biological chelation component, natural corrosion inhibition dispersion buffer component, environmental protection bacteriostatic low-foam auxiliary agent, deionized water carrier, core function raw material is taken from plant fermentation, natural oil, microbial fermentation product, abandon petroleum-based non-degradable auxiliary agent, realize the biodegradation of all components, build wetting+permeation+solubilization+emulsification+curling+dispersion six-element synergistic degreasing system, overcome the industry pain point that traditional water-based cleaning agent is difficult to clean thick lithium / calcium / urea-based grease, heavy oil stain 10s rapid stripping effect.

Description

Technical Field

[0001] This invention relates to the field of industrial degreasing and cleaning agents, specifically a bio-based biodegradable industrial degreasing and cleaning agent and its preparation method. Background Technology

[0002] Currently, the degreasing of workpieces in the fields of aviation, machining, and ship maintenance has long relied on solvents such as gasoline, kerosene, diesel, and alcohol ethers, which presents the following problems. 1) Safety hazards: Flash points are generally <40℃, making them volatile, flammable, and explosive. Storage, transportation, and on-site cleaning are prone to ignition and explosion when exposed to open flames or static electricity. Closed cabins and aircraft equipment maintenance are high-risk work scenarios with extremely high safety management costs. 2) Human toxicity: Large amounts of VOCs are released, and alkanes and trace amounts of benzene vapors damage the respiratory tract and nervous system. Long-term operation can easily lead to occupational diseases. 3) Failure to meet environmental standards: They cannot be naturally biodegraded, and direct discharge of wastewater pollutes the environment. Excessive VOCs do not comply with GB38508-2020 and RoHS control requirements. Environmental policies in many parts of China restrict the use of solvent-based cleaning agents. 4) Poor material compatibility: Hydrocarbon solvents easily swell rubber seals and engineering plastic parts, and corrode some paint and special protective coatings, making simultaneous cleaning of multi-material composite precision workpieces impossible. 5) High usage costs: Solvents are consumed once and cannot be recycled. Natural evaporation leads to large losses, high consumable costs, and a drying process is required after cleaning, resulting in high labor and energy costs.

[0003] To address the above issues, commercially available water-based cleaning agents have emerged, such as products from BASF, 3M, and Dow, as well as some domestically produced conventional water-based cleaning agents. These generally suffer from the following technical problems: 1) Severe acid-base differentiation: High proportions of strong acids and alkalis in the formulation. Strong alkalis corrode amphoteric non-ferrous metals such as aluminum, magnesium, and zinc, while strong acids easily cause hydrogen embrittlement of metals and loss of gloss and peeling of paint. Neutral cleaning agents on the market generally have weak degreasing capabilities, with removal rates of less than 70% for thick lithium-based, calcium-based, and urea-based greases, making them unable to replace solvent-based products; 2) Defects in environmentally friendly formulations: Commonly added phosphorus chelating agents, nonylphenol petroleum-based surfactants, and inorganic heavy metal additives, resulting in poor biodegradability, non-compliance with RoHS environmental regulations, and high wastewater treatment costs; 3) Narrow applicable temperature range: Conventional water-based... The cleaning agent has a freezing point above 0°C, causing it to freeze and fail in low-temperature environments, making it unsuitable for open-air aviation ground operations in northern regions; the system's cloud point is generally below 85°C, causing demulsification and stratification during high-temperature heating and steam cleaning, making it unsuitable for high-temperature cleaning conditions above 100°C; 4) Narrow range of applicable greases: It is only effective for light mineral machine oils, has poor peeling ability for thick, high-temperature lubricating greases, and requires long-term immersion in heavily soiled workpieces, resulting in low cleaning efficiency; 5) Insufficient circulation stability: It is prone to mold growth and stratification during storage and use, resulting in a short service life of the cleaning tank solution, making it difficult to recycle and reuse for a long time, and its overall economic efficiency is insufficient. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: including bio-based wetting and penetrating components, bio-emulsifying and shrinking core components, natural plant solubilizing components, phosphorus-free bio-chelating components, natural corrosion-inhibiting and dispersing buffer components, environmentally friendly antibacterial and low-foaming additives, and deionized water carriers.

[0005] Preferably, the bio-based wetting and penetrating components are alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, and cocamidopropyl betaine, and the corresponding mass fraction ratios of alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, and cocamidopropyl betaine in the industrial degreasing and cleaning agent are 3.0-5.0, 2.0-3.5, and 1.2-2.0, respectively.

[0006] Preferably, the core components of the bio-emulsification and shrinkage are sophorolipid, rhamnolipin and rapeseed oil-modified triethanolamine oleate, and the corresponding mass fraction ratios of sophorolipid, rhamnolipin, and rapeseed oil-modified triethanolamine oleate in the industrial degreasing and cleaning agent are 2.5-4.0, 1.5-3.0 and 2.2-3.8 respectively.

[0007] Preferably, the natural plant solubilizing components are dextrorotatory limonene and sorbitol derivatives, and the corresponding mass fraction ratio of dextrorotatory limonene to sorbitol derivatives in the industrial degreasing and cleaning agent is 1.0-2.5% and 2.0-3.5%, respectively.

[0008] Preferably, the phosphorus-free biochelating component is tetrasodium glutamate diacetate (GLDA) and a chitosan-citric acid crosslinking complex, and the corresponding mass fraction ratio of GLDA to the industrial degreasing agent is 1.8-3.2 and the chitosan-citric acid crosslinking complex is 0.8-1.8. The chitosan-citric acid crosslinking complex is prepared by taking food-grade chitosan, adding deionized water to swell at room temperature for 2 hours, adding anhydrous citric acid, stirring at low speed at 40°C for 3 hours to induce a crosslinking reaction, and then naturally cooling to room temperature to obtain the pre-prepared chitosan-citric acid crosslinking complex. The mass ratio of food-grade chitosan, deionized water and anhydrous citric acid used is 5:35:3.

[0009] Preferably, the natural corrosion-inhibiting and dispersing buffer component is sodium gluconate and triisopropanolamine, and the corresponding mass fraction ratio of sodium gluconate to triisopropanolamine in the industrial degreasing and cleaning agent is 1.2-2.5 and 0.5-1.2.

[0010] Preferably, the environmentally friendly antibacterial and low-foaming additive is rapeseed oil-based silicone-free polyglycerol defoamer and sodium hydroxymethylglycinate, and the corresponding mass fraction ratio of rapeseed oil-based silicone-free polyglycerol defoamer to sodium hydroxymethylglycinate is 0.2-0.5 and 0.1-0.3, respectively.

[0011] Preferably, the industrial degreasing and cleaning agent comprises the following mass fractions: alkyl glucoside APG0810 4.0, modified fatty acid methyl ester ethoxylate FMEE 2.8, cocamidopropyl betaine 1.6, sophorolipid 3.2, rhamnolipid 2.2, modified triethanolamine oleate 3.0, dextrorotatory limonene 1.8, sorbitol derivative 2.8, GLDA tetrasodium glutamate diacetate 2.5, chitosan-citric acid crosslinked complex 1.2, sodium gluconate 1.8, triisopropanolamine 0.8, rapeseed oil-based silicone-free polyglycerol defoamer 0.3; sodium hydroxymethylglycinate 0.2 and deionized water 72.6.

[0012] A method for preparing a bio-based biodegradable industrial degreasing and cleaning agent, comprising the following steps: Step 1: Prepare organic functional phase A material Alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, cocamidopropyl betaine, rapeseed oil modified oleic acid triethanolamine, sophorolipid, rhamnolipid, dextrorotatory limonene, and sorbitol derivative were added sequentially and in sufficient quantities to a room temperature reactor and stirred for 30 minutes until a completely transparent homogeneous liquid A was obtained. Step 2: Prepare chelated buffer B material Add some deionized water to the spare mixing tank, and then add sufficient amounts of tetrasodium glutamate diacetate (GLDA), sodium gluconate, triisopropanolamine, and sodium hydroxymethylglycinate in sequence. Stir for 20 minutes until completely dissolved. Add the pre-prepared chitosan-citric acid crosslinking complex and continue stirring for 15 minutes to mix evenly to obtain chelated buffer material B. Step 3: Compounding, maturation, and finished product discharge Under low-speed stirring, add component A to component B at a uniform and slow speed. After the addition is complete, continue stirring for 40 minutes. Add rapeseed oil-based silicone-free polyglycerol defoamer, add the remaining deionized water, and stir for 30 minutes. Let it stand and mature at room temperature for 12 hours, and then filter it precisely to obtain the finished product stock solution.

[0013] This invention provides a bio-based biodegradable industrial degreasing and cleaning agent and its preparation method. It has the following beneficial effects: 1. Safety performance advantages: The raw solution has no flash point, is non-flammable and non-explosive, eliminating the fire and explosion hazards of solvent cleaning such as gasoline and kerosene from the source; the product is colorless and odorless, and can be directly contacted with the skin without irritation, avoiding occupational diseases caused by the volatilization of organic solvents, and meeting the safety operation standards of military-grade enclosed compartments.

[0014] 2. Green and environmentally friendly advantages: The main raw materials of the formula are plant and microbial bio-derived products. It is free of phosphorus, heavy metals, nonylphenol, and VOCs. The whole components have a high biodegradability rate, and the waste liquid can be naturally biodegraded, which greatly reduces the cost of treating waste.

[0015] 3. All-material compatibility advantage: Precise micro-neutral formula, overcoming the material limitations of strong acid and alkali cleaning agents. Carbon steel, cast iron, various alloys of aluminum, copper and magnesium, aerospace special coatings, industrial paint, rubber, PC / ABS engineering plastics can all be cleaned in the same tank without corrosion, hydrogen embrittlement, swelling and aging of rubber and plastics.

[0016] 4. High-efficiency degreasing advantage: Relying on the unique shrinkage degreasing mechanism of biological surfactants, it overcomes the industry problem of difficult cleaning of thick lithium / calcium / urea-based greases. Heavy oil stains are quickly wetted and peeled off in 10 seconds, with a degreasing rate of 91%~99%. The cleaning effect is comparable to and better than imported military cleaning agents from 3M and BASF.

[0017] 5. Wide temperature stability advantage: The formula achieves antifreeze at -8℃ and no emulsion at ultra-high temperature of 135℃. Conventional water-based cleaning agents on the market cannot achieve dual stability at high and low temperatures at the same time. It is suitable for use in open-air and enclosed high-temperature equipment throughout the year and is compatible with new steam cleaning processes. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A bio-based biodegradable industrial degreasing and cleaning agent comprises the following components by mass fraction (wt%): alkyl glucoside APG0810 4.0, modified fatty acid methyl ester ethoxylate FMEE 2.8, Cocamidopropyl Betaine 1.6, Sophorolipid 3.2, Rhamnolipid 2.2, Modified Triethanolamine Oleate 3.0, D-Limonene 1.8, Sorbitol Derivative 2.8, GLDA Tetrasodium Glutamate Diacetate 2.5, Chitosan-Citrate Crosslinked Complex 1.2, Sodium Gluconate (Corn Starch Fermentation) 1.8, Triisopropanolamine 0.8, Rapeseed Oil-Based Silicone-Free Polyglycerol Defoamer 0.3; Sodium Hydroxymethylglycinate 0.2 and Deionized Water 72.6. Among the above, alkyl glucoside APG0810 (coconut starch glycoside) is used to reduce the surface tension of the system, quickly wet the substrate gaps, and is biodegradable and low-irritant; Modified Fatty Acid Methyl Ethoxylate FMEE (Palm Oil Derivative) is used for strong interfacial penetration, penetrating the oil-metal interface to achieve interfacial separation; Cocamidopropyl Betaine (coconut oil-based amphoteric surfactant) is used for synergistic wetting, pH buffering, and protection of easily corroded non-ferrous metals such as aluminum and copper; Sophorolipid... Glycolipids (glucose microbial fermentation) are used to disrupt the lithium / calcium / urea lipid network structure, causing oils to clump and detach; rhamnollipids are used to emulsify mineral oil and coking sludge, suspend and disperse oil stains, and facilitate full biodegradation; rapeseed oil-modified triethanolamine oleate is used to saponify acidic oil stains, assisting in the emulsification of thick greases and providing corrosion protection for carbon steel; dextrorotatory limonene (cold-pressed from citrus peel) is used to dissolve aged tar and solidify lubricating grease; sorbitol derivatives are used for low-temperature antifreeze and to raise the system's cloud point, achieving -8℃ antifreeze and 135℃ high-temperature resistance; GLDA tetrasodium glutamate diacetate (bran fermentation) is used to chelate calcium, magnesium, iron, and copper ions in water, resisting demulsification in hard water and replacing EDTA and phosphates; chitosan-citric acid crosslinking complex enables the substrate to form a film for corrosion protection and hydrogen embrittlement prevention; triisopropanolamine is used to fine-tune the pH to 7.2~8.3, replacing strong alkalis such as sodium hydroxide and soda ash; sodium hydroxymethylglycinate is used for long-term antibacterial effect, preventing mold growth and stratification of the original solution and extending the tank solution's circulation life; The degreasing mechanism is as follows: the APG+FMEE compound reduces the surface tension of the system to 22-26 mN / m, rapidly wetting microscopic gaps. The agent penetrates into the metal-oil interface, and sophorolipids and rhamnolipids are directionally adsorbed inside the thick grease. The three-dimensional cross-linked network structure of lithium / calcium / urea grease is destroyed, causing the grease to shrink into clumps and peel off from the substrate. Natural dextrorotatory limonene and modified triethanolamine oleate emulsify and encapsulate the detached grease in an oil-in-water emulsion, preventing the grease from re-adhering to the workpiece. GLDA+modified chitosan chelates hard water ions in water, eliminating demulsification and stratification caused by calcium and magnesium ions, and improving the hard water resistance of the formula. Sodium gluconate and chitosan derivatives stably disperse and suspend solid sludge and metal shavings in the cleaning fluid, facilitating filtration and slag removal, and enabling the recycling and regeneration of the cleaning fluid. The chitosan-citric acid cross-linked complex forms an ultra-thin organic protective film on various metal surfaces, preventing aluminum and copper corrosion and steel hydrogen embrittlement, while also preventing swelling of paint and rubber and plastic substrates.

[0020] Key performance parameters of the product: Comparative test of this invention with imported cleaning agents from 3M and BASF Test standards: Refer to GB / T 261, GB / T 18856, OECD 301B biodegradation standard, and aviation MIL military cleaning test specifications; Test specimens: Q235 carbon steel, 6061 aluminum alloy, H62 brass, magnesium alloy, PC / ABS, nitrile rubber, aviation paint test pieces; oil stains: lithium-based grease, calcium-based grease, urea-based high-temperature grease, and old coking sludge from equipment; Comparison samples: 3M aviation-grade neutral water-based cleaning agent and BASF BONDERITE degreasing cleaning agent.

[0021] Comprehensive performance benchmark test data: Material corrosion compatibility control test data: Test conditions: Full immersion for 72 hours, constant temperature at 40℃; corrosion rate unit: mg / (cm²). 2 •24h), the qualified judgment standard is: corrosion rate <0.04.

[0022] Economic comparison of field applications: 1. Safety storage and transportation costs: This product has no flash point, so there is no need for explosion-proof warehouses or explosion-proof vehicles for storage and transportation; 3M and BASF products are flammable, and storage requires explosion-proof qualifications and explosion-proof equipment, resulting in overall storage costs that are more than 45% higher.

[0023] 2. Consumable cost: For the same amount of degreasing work, this product has a higher dilution ratio, and the cost of the agent per unit cleaning area is only 32% of that of 3M and 28% of that of BASF; the waste liquid can be recycled, further reducing consumable costs.

[0024] 3. Labor and energy costs: Traditional solvent / imported cleaning agents require hot air drying of workpieces after cleaning (high energy consumption and long working time); this product rinses with water and air dries naturally, eliminating the drying process and reducing the working time per batch of workpieces by 35%.

[0025] Conclusion of comparative experiment: 1. Leading innovation in temperature range stability: Imported 3M and BASF products on the market generally have a freezing point ≥-2℃ and a cloud point ≤85℃, which cannot meet the requirements of low-temperature outdoor cleaning at -8℃ and high-temperature steam military cleaning at 135℃; This invention relies on a biological compound system of sophorolipid + rhamnolipid + sorbitol to achieve ultra-wide temperature stability, which is an innovative performance that existing imported products do not have.

[0026] 2. Outstanding advantage of full material compatibility: BASF's strong alkali formula corrodes aluminum-magnesium alloys and paint, while 3M's medium-strong alkali has a chronic corrosion effect on non-ferrous metals and rubber and plastics; this invention relies on the chitosan-citric acid cross-linking corrosion inhibition system to achieve full material compatibility, filling the technical gap of imported products that cannot perform paint baking and multi-alloy cleaning in the same tank.

[0027] 3. Environmental degradation performance is significantly better than imported products: 3M and BASF mainly use petroleum-based surfactants, with a biodegradability rate of less than 60%; the whole component of the raw materials of this invention is bio-based, with a degradation rate of >92%, which complies with the EU REACH and the new regulations for green procurement in the military industry.

[0028] 4. Overcoming the shortcomings of imported products in heavy grease removal performance: Imported products have a removal rate of less than 70% for lithium / calcium / urea-based thick greases in 10 seconds and require soaking for several minutes; the unique grease curling mechanism of the bio-glycolipid of this invention allows for rapid grease removal in 10 seconds, and the oil removal efficiency far exceeds that of comparable products.

[0029] 5. Uses products that are far more economical than imported ones: Concentration ratio, recycling capacity, and solvent substitution rate are all superior, significantly reducing the cost of large-scale maintenance and procurement for military and aerospace industries.

[0030] It can be applied in the following areas: Aircraft maintenance and airport ground services: degreasing of aircraft parts, landing gear, hydraulic components, aviation special coatings, and precision instruments, replacing aviation kerosene cleaning; Military ships and special equipment: ship propulsion components, cabin machinery, gun and cannon parts, copper pipelines, and degreasing and cleaning of ship protective coatings; Machining industry: Removal of cutting oil and rust-preventive grease from carbon steel, cast iron, 6061 / 7075 aluminum alloy, and copper-magnesium alloy stamping parts; Pre-coating treatment: Degreasing and oil removal of metallic paint substrates without damaging the topcoat or primer, solving the problem of strong alkaline cleaning agents corroding the paint surface; Precision electromechanical and optical instruments: Degreasing of composite rubber-plastic + metal assemblies, bearings, and seals to prevent aging of plastic and rubber; Suitable cleaning processes: manual wiping, low-pressure spraying, high-pressure high-temperature spraying, ultrasonic cleaning, 135℃ high-temperature steam cleaning. The waste liquid can be recycled 3-5 times after filtration.

[0031] One ton of raw liquid can replace more than 20 tons of gasoline and kerosene; the cleaning waste liquid can be filtered and regenerated for recycling, eliminating the drying process and reducing the costs of chemicals, energy, and labor.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bio-based biodegradable industrial degreasing and cleaning agent, characterized in that: It includes bio-based wetting and penetrating components, bio-emulsifying and shrinking core components, natural plant solubilizing components, phosphorus-free bio-chelating components, natural corrosion-inhibiting and dispersing buffer components, environmentally friendly antibacterial and low-foaming additives, and deionized water carriers.

2. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 1, characterized in that: The bio-based wetting and penetrating components are alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, and cocamidopropyl betaine, and the corresponding mass fraction ratios of alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, and cocamidopropyl betaine in the industrial degreasing and cleaning agent are 3.0-5.0, 2.0-3.5, and 1.2-2.0, respectively.

3. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 2, characterized in that: The core components of the bio-emulsifying and shrinking agent are sophorolipid, rhamnolipin, and rapeseed oil-modified triethanolamine oleate, and the corresponding mass fraction ratios of sophorolipid, rhamnolipin, and rapeseed oil-modified triethanolamine oleate in the industrial degreasing and cleaning agent are 2.5-4.0, 1.5-3.0, and 2.2-3.8, respectively.

4. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 3, characterized in that: The natural plant solubilizing components are dextrorotatory limonene and sorbitol derivatives, and the corresponding mass fraction ratio of dextrorotatory limonene to sorbitol derivatives in the industrial degreasing and cleaning agent is 1.0-2.5% and 2.0-3.5%, respectively.

5. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 4, characterized in that: The phosphorus-free biochelating component consists of tetrasodium glutamate diacetate (GLDA) and a chitosan-citric acid crosslinking complex, with a corresponding mass fraction ratio of 1.8-3.2 for GLDA and 0.8-1.8 for the chitosan-citric acid crosslinking complex in the industrial degreasing agent. The chitosan-citric acid crosslinking complex is prepared by taking food-grade chitosan, adding deionized water to swell at room temperature for 2 hours, adding anhydrous citric acid, stirring at low speed at 40°C for 3 hours to induce a crosslinking reaction, and then naturally cooling to room temperature to obtain the pre-prepared chitosan-citric acid crosslinking complex. The mass ratio of food-grade chitosan, deionized water, and anhydrous citric acid used is 5:35:

3.

6. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 5, characterized in that: The natural corrosion-inhibiting and dispersing buffer components are sodium gluconate and triisopropanolamine, and the corresponding mass fraction ratio of sodium gluconate to triisopropanolamine in the industrial degreasing and cleaning agent is 1.2-2.5 and 0.5-1.

2.

7. The bio-based biodegradable industrial degreasing and cleaning agent and its preparation method according to claim 6, characterized in that: The environmentally friendly antibacterial and low-foaming additives are rapeseed oil-based silicone-free polyglycerol defoamer and sodium hydroxymethylglycinate, and the corresponding mass fraction ratios of rapeseed oil-based silicone-free polyglycerol defoamer and sodium hydroxymethylglycinate in the industrial degreasing and cleaning agent are 0.2-0.5% and 0.1-0.3%, respectively.

8. The bio-based biodegradable industrial degreasing and cleaning agent according to claim 7, characterized in that, The industrial degreasing and cleaning agent comprises the following mass fractions: alkyl glucoside APG0810 4.0, modified fatty acid methyl ester ethoxylate FMEE 2.8, cocamidopropyl betaine 1.6, sophorolipid 3.2, rhamnolipid 2.2, modified triethanolamine oleate 3.0, dextrorotatory limonene 1.8, sorbitol derivative 2.8, GLDA tetrasodium glutamate diacetate 2.5, chitosan-citric acid crosslinked complex 1.2, sodium gluconate 1.8, triisopropanolamine 0.8, rapeseed oil-based silicone-free polyglycerol defoamer 0.3; sodium hydroxymethylglycinate 0.2 and deionized water 72.

6.

9. A method for preparing a bio-based biodegradable industrial degreasing and cleaning agent, used to prepare the bio-based biodegradable industrial degreasing and cleaning agent as described in claim 7 or 8, characterized in that, Includes the following steps: Step 1: Prepare organic functional phase A material Alkyl glucoside APG0810, modified fatty acid methyl ester ethoxylate FMEE, cocamidopropyl betaine, rapeseed oil modified oleic acid triethanolamine, sophorolipid, rhamnolipid, dextrorotatory limonene, and sorbitol derivative were added sequentially and in sufficient quantities to a room temperature reactor and stirred for 30 minutes until a completely transparent homogeneous liquid A was obtained. Step 2: Prepare chelated buffer B material Add some deionized water to the spare mixing tank, and then add sufficient amounts of tetrasodium glutamate diacetate (GLDA), sodium gluconate, triisopropanolamine, and sodium hydroxymethylglycinate in sequence. Stir for 20 minutes until completely dissolved. Add the pre-prepared chitosan-citric acid crosslinking complex and continue stirring for 15 minutes to mix evenly to obtain chelated buffer material B. Step 3: Compounding, maturation, and finished product discharge Under low-speed stirring, add component A to component B at a uniform and slow speed. After the addition is complete, continue stirring for 40 minutes. Add rapeseed oil-based silicone-free polyglycerol defoamer, add the remaining deionized water, and stir for 30 minutes. Let it stand and mature at room temperature for 12 hours, and then filter it precisely to obtain the finished product stock solution.

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