A traceless self-slipping type rheological regulation glass rinse water-based auxiliary

Abstract

The application discloses a traceless self-sliding type rheological regulation glass rinsing water-based additive and belongs to the technical field of fine chemical water-based rinsing additives.The application takes polyethylene oxide with a molecular weight of 800,000-1,000,000 as a rheological regulation main body, and is compounded with fatty alcohol polyoxyethylene ether AEO-3, sodium citrate dihydrate, water-soluble polyether modified silicone oil, polyether silicon-free defoaming agent and deionized water, and can selectively add carboxymethylcellulose sodium preservative.The application constructs a water body rheological bunching and interface slip drag reduction double synergistic system, through the regular high-pressure water flow form of polyethylene oxide, with the help of AEO-3 activated interface and auxiliary construction of a low-resistance slip layer, accelerates the overall water flow sliding, and stably controls the high-pressure single spraying rinsing residual mark rate to be less than 3%.The application is neutral, environmentally friendly, has strong substrate compatibility, and has a wide working condition adaptation range, and effectively solves the industry pain point that glass and photovoltaic panel unmanned high-pressure rinsing is easy to leave water marks.

Description

Technical Field

[0001] This invention belongs to the technical field of water-based fine chemical rinsing aids, specifically relating to a neutral water-based aid with rheological regulation, water flow focusing, interface self-slippage, and ultra-low drying residue properties. It is mainly suitable for unmanned high-pressure single-jet rinsing operations on building glass curtain walls and photovoltaic tempered glass, and can be adapted to various hard, clean facade rinsing conditions. This invention is a dedicated high-pressure rinsing aid, with the core functions of eliminating watermarks and optimizing fluid rinsing patterns. It provides a gentle auxiliary cleaning effect, without relying on powerful cleaning, and complies with the national standard GB / T 26396-2021 "Safety Technical Specifications for Detergent Products". Background Technology

[0002] Currently, high-altitude, high-pressure single-jet cleaning by drones has become the mainstream process for routine maintenance of glass curtain walls and photovoltaic modules due to its advantages of high efficiency, safety, and unmanned operation, completely replacing the traditional manual wiping and low-pressure multiple-spraying operation mode. Existing glass cleaning additives and publicly available patented technologies focus on reducing water surface tension, enhancing the full-area spread of water film, and improving the ability to emulsify and remove dirt. They are only suitable for manual wiping and multiple-spraying operations and cannot meet the stringent conditions of high-pressure single-jet cleaning.

[0003] The closest existing technology in the industry is the commercially available neutral glass curtain wall cleaning agent for mainstream engineering applications, a common commercial product in the engineering operation and maintenance field. The core components of this type of product are sodium fatty alcohol polyoxyethylene ether sulfate, sodium citrate, conventional silicone defoamers, and purified water. The overall technical approach focuses on strong wetting and strong emulsification for cleaning, without any fluid rheology control components. This type of traditional cleaning agent has inherent technical defects: after high-pressure, high-speed water jets impact smooth glass surfaces, disordered diffusion and atomized splashing occur, forming a microscopic water film of extremely uneven thickness; unmanned single-rinse operation without secondary water replenishment or manual wiping correction results in significant differences in evaporation rates across different areas of the water film, ultimately forming streaks and mottled residues, greatly reducing the pass rate of glass and photovoltaic panel cleaning. Furthermore, the over-wetting properties of traditional additives prolong the water film retention time, further exacerbating residue defects, making it completely unsuitable for unmanned, high-pressure single-jet operation.

[0004] A search revealed that existing glass cleaning solutions, such as those in patents CN113215023A and CN109535897A, primarily use anionic surfactants and common wetting agents in their formulations. These only improve water film spreading and dirt emulsification capabilities, lacking high-molecular rheology control components and failing to constrain high-pressure jet atomization and diffusion. The few technologies involving fluid control rely heavily on mechanical equipment modifications, resulting in high costs, poor adaptability, and incompatibility with existing unmanned rinsing equipment. In summary, the industry currently lacks specialized additives that can achieve water rheology control, construct interfacial slip layers, and eliminate high-pressure rinsing residues at the source through formulation modification, representing a clear technological gap. Summary of the Invention

[0005] This invention addresses the technical shortcomings of existing traditional glass cleaning additives, such as severe high-pressure rinsing residues, poor fluid compatibility, easy water film retention, and weak operational compatibility. It abandons the long-standing industry bias of "strong wetting equals superior cleaning" and innovatively constructs a dual-synergistic technology system of water body rheological clustering regulation and solid-liquid interface drag reduction, providing a residue-free, self-slipping rheology-regulated water-based glass rinsing additive. This invention regulates the macroscopic morphology of water flow through specific molecular weight polymers, combined with composite interface-modifying components to construct a low-resistance sliding interface, solving the core pain points of uneven water film and drying residue after a single high-pressure rinse. Simultaneously, it retains gentle cleaning capabilities and possesses advantages such as neutrality and environmental friendliness, strong equipment compatibility, stable storage, and scalable mass production.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A traceless, self-slipping rheology-modifying glass rinsing water-based additive, by mass percentage, mainly consists of the following components: 0.15%–0.25% polyethylene oxide, 1.0%–2.0% fatty alcohol polyoxyethylene ether AEO-3, 0.3%–0.7% sodium citrate dihydrate, 0.2%–0.4% water-soluble polyether modified silicone oil, 0.2%–0.3% polyether silicone-free defoamer, with the balance being deionized water, and the total mass percentage of all components being 100%.

[0007] Preferably, the weight-average molecular weight of the polyethylene oxide is limited to 800,000 to 1,000,000. This range can accurately balance the rheological binding effect in water, rapid solubility at room temperature, long-term storage stability and compatibility with precision nozzles, with no risk of gel precipitation or pipeline blockage. It is the optimal parameter range obtained by screening multiple sets of gradient experiments.

[0008] Preferably, the pH value of the finished additive is controlled between 6.8 and 7.2, forming a neutral system throughout the process. It does not corrode, swell, or discolor the glass substrate, photovoltaic coating layer, silicone sealant, or aluminum alloy curtain wall profile, and exhibits excellent material compatibility.

[0009] Preferably, the system can selectively add 0.05% to 0.15% Kathon preservative to suit long-term industrial storage and outdoor stocking scenarios, ensuring that the finished product does not separate, mold, or significantly degrade in performance after 6 months of sealed storage at room temperature. The addition reduces the deionized water content by an equal mass, maintaining a constant total formulation. The Kathon preservative is a commercially available standard system of methylisothiazolinone and methylchloroisothiazolinone in a 1:3 mass ratio.

[0010] The water-soluble polyether modified silicone oil is Dow Corning DC57, with a cloud point of 45°C, and is a fully water-soluble modified polyether siloxane; the polyether silicone-free defoamer is BASF Pluronic L61 polyether defoamer with 100% active ingredient content; both are industry-standard raw materials, and alternative brands with the same performance can achieve the same technical effect as this invention.

[0011] This invention abandons traditional misconceptions and does not rely on excessive wetting and spreading to achieve cleaning effects. Instead, it utilizes the precise functional synergy of polyethylene oxide and AEO-3, combined with modified silicone oil to construct an interfacial slip system. This addresses the problem of high-pressure rinsing residue from both hydrodynamic and interfacial perspectives. Each component has a clear function, synergistic complementarity, and no performance antagonism. The specific mechanism is as follows: 1. Water Rheological Clustering Control Mechanism: When polyethylene oxide with a specific molecular weight of 800,000 to 1,000,000 dissolves in water, the molecular chains fully extend and intertwine, forming a uniform and stable flexible polymer network structure. This slightly increases the cohesive energy of water molecules and the overall apparent viscosity, precisely optimizing the rheological properties of the high-pressure jet. This network structure effectively constrains the disordered diffusion and atomization splash of high-speed water flow, ensuring that the water flow maintains a continuous and dense stream shape after impacting a smooth glass surface. This avoids the formation of uneven microscopic water films, eliminates the preconditions for differential evaporation and watermark residue, and achieves a well-defined clustering effect for the high-pressure water flow.

[0012] 2. Solid-Liquid Interface Slip Layer Construction Mechanism: Fatty alcohol polyoxyethylene ether (AEO-3) possesses excellent interfacial activation and adsorption conductivity, which can rapidly reduce the adsorption energy at the solid-liquid interface. This facilitates the uniform and directional distribution of water-soluble polyether-modified silicone oil on the smooth interface of glass and photovoltaic coatings, stably forming a nanoscale dense, low-friction slip layer. This slip layer significantly reduces the contact resistance between water flow and the substrate surface, alters the water flow adhesion and movement state, and guides the aggregated water flow to slide smoothly and quickly down the vertical surface, eliminating localized water dripping and edge water accumulation problems, and thoroughly inhibiting residue formation from the rinsing process perspective.

[0013] 3. Synergistic Mechanism of Two Components: Polyethylene oxide focuses on the rheological modification of the water body, responsible for regulating the water flow pattern and inhibiting disordered spreading, solving the problems of high-pressure water splashing and uneven water film; AEO-3 does not undertake the core role of global wetting and spreading, but focuses on interfacial activation and conduction, assisting the modified silicone oil in building a stable slip layer, solving the problem of water adhering to the wall. The two components have clear division of labor and bidirectional empowerment, forming a seamless rinsing effect that cannot be achieved by traditional single-agent formulations through a linkage mechanism of "upstream regulation of water flow pattern and downstream acceleration of water flow detachment." The synergistic gain effect is significant and non-obvious.

[0014] 4. Stable and compatible mechanism: Sodium citrate dihydrate can efficiently chelate calcium and magnesium ions in water to soften the water and prevent secondary scale residues under hard water conditions. At the same time, it stabilizes the pH value of the system and ensures neutral and environmentally friendly properties throughout the process. Polyether silicone-free defoamer can precisely suppress foaming during high-pressure and high-speed shearing processes, avoid foam adhering to the substrate and forming secondary stains, and is compatible with continuous automated operation conditions of precision nozzles.

[0015] All performance tests of this invention are conducted under the following unified standards: ambient temperature 25℃, relative humidity 50%, spray pressure 5MPa, spray distance 10m, 1.5mm direct nozzle, standard float glass substrate. All experimental groups and comparative examples are tested in parallel with three groups and the average value is taken to ensure that the data is objective and reproducible.

[0016] 1. Residual Residue Rate R Detection Method: A 20-megapixel industrial camera was used to vertically photograph the glass surface after rinsing and drying under a D65 standard light source. ImageJ image processing software was used for binarization. Areas with a grayscale value lower than 120 were identified as water stains. The residual residue rate was calculated using the formula R = (Sstain / Stotal) × 100%, where Sstain is the total area of ​​the residue and Stotal is the total area of ​​a single rinse.

[0017] 2. Apparent viscosity and surface tension testing: The apparent viscosity of the modified water was measured using a rotational viscometer (25℃, 0# rotor); the surface tension at room temperature was measured using a fully automatic surface tension meter with a drop plate method; pure water reference parameters: dynamic viscosity of pure water at room temperature η0 = 1.002 mPa·s, surface tension of pure water γ0 = 72.8 mN / m; cohesion enhancement coefficient Kc = (ηapp·γ) / (η0·γ0).

[0018] 3. Determination of molecular weight of polyethylene oxide: Gel permeation chromatography (GPC) was used for testing. The mobile phase was deionized water, and the standard was a narrow-distribution polyethylene oxide standard. The weight-average molecular weight (Mw) was determined.

[0019] 4. Interfacial friction resistance test: The inclined plane sliding method is used for measurement. The standard float glass slide is fixed at a 45° angle. 2 mL of the test liquid is released from the same position at the top of the inclined plane. The time it takes for the liquid to completely slide over the 10 cm calibrated slope is recorded. The reduction of interfacial friction resistance is calculated based on the pure water sliding time as the benchmark, according to the resistance reduction rate = (pure water sliding time - sample sliding time) / pure water sliding time × 100%.

[0020] 5. Storage performance retention rate test: After the finished additive is sealed and stored at room temperature for 6 months, the residue rate is determined according to the same test method; performance retention rate = (initial residue rate / residue rate after storage) × 100%, the closer the value is to 100%, the smaller the performance degradation.

[0021] Residue rate R: Calculated using image analysis method, R = (Sstain / Stotal) × 100%, where Sstain is the total area of ​​visible residue after drying, and Stotal is the total area of ​​a single rinse. The lower the value, the better the residue-free effect.

[0022] The cohesion enhancement coefficient Kc is used to objectively quantify the water flow's ability to concentrate and resist dispersion. It serves only as a parameter to support the technical effect and is not a limiting feature of the product structure. The calculation formula is: Kc=(ηapp·γ) / (η0·γ0). Where: ηapp is the apparent viscosity of the modified water at 25℃; γ is the surface tension of the modified water; η0 is the dynamic viscosity of pure water at room temperature (1.002 mPa·s); γ0 is the surface tension of pure water at room temperature (72.8 mN / m). Beneficial effects

[0023] 1. Eliminate the pain point of high-pressure flushing residue in the industry: Through the dual synergistic mechanism of rheological clustering and interface sliding, the residue rate of high-pressure single spray is stably controlled within 3%, eliminating the need for secondary flushing and manual wiping. It is perfectly adapted to unmanned and automated flushing conditions, filling the technological gap in the industry.

[0024] 2. The technical solution is non-obvious: Through multi-gradient molecular weight comparison experiments, it has been verified that 800,000 to 1,000,000 molecular weight polyethylene oxide is the only optimal range that takes into account the bundle effect, solubility, equipment compatibility and storage stability. This is not something that can be easily obtained by conventional experiments, and it has outstanding creativity and technological progress.

[0025] 3. Extremely versatile for various working conditions: It can be adapted to different water qualities such as deionized water, ordinary municipal tap water, and hard water with high hardness. It is compatible with complex pollution conditions such as light dust accumulation, heavy dust accumulation, and slight surface oil stains. The residue rate remains stable and meets the standard even in complex scenarios, and its adaptability far exceeds that of traditional cleaning agents.

[0026] 4. Safe and environmentally friendly, and material compatible: Free from strong acids and alkalis, organic solvents, and harmful additives. It is neutral and mild and does not corrode various substrates such as glass, photovoltaic coatings, sealants, and metal profiles. Waste liquid can be naturally degraded, making it green and pollution-free, and meeting industrial operation and maintenance environmental protection standards.

[0027] 5. Excellent mass production and equipment compatibility: It is fully water-soluble with no solid phase and no gel precipitation. It does not clog precision nozzles during long-term high-pressure injection and the flow rate is stable. The raw materials are bulk industrial raw materials, prepared at room temperature and pressure. The process parameters are quantitatively controllable and the cost is low, making it suitable for large-scale mass production and long-term storage. Attached Figure Description

[0028] Figure 1 is a schematic diagram comparing the effects of the additive of the present invention and high-pressure rinsing of glass with pure water.

[0029] The left side represents the pure water rinsing condition: 3 indicates the water flow pattern during rinsing, and 4 indicates the glass surface condition after rinsing and drying; the right side represents the rinsing condition of the additives of this invention: 5 indicates the water flow pattern during rinsing, and 6 indicates the glass surface condition after rinsing and drying.

[0030] Figure label: 3 - Pure water rinsing flow pattern; 4 - Residual residue after rinsing with pure water; 5 - Flushing water flow pattern of additives; 6 - Clean state after rinsing with additives. Detailed Implementation

[0031] All embodiments and comparative examples of this invention use the same equipment, the same quantitative process parameters, and the same testing environment, completely abandoning subjective judgment criteria. The entire stirring process uses a propeller-type stirring paddle, with a fixed rotation speed as the core control parameter, resulting in strong process stability.

[0032] Example 1 formulation mass percentage: 0.2% polyethylene oxide (800,000 to 1,000,000 molecular weight), 1.5% fatty alcohol polyoxyethylene ether AEO-3, 0.5% sodium citrate dihydrate, 0.3% water-soluble polyether modified silicone oil, 0.25% polyether silicone-free defoamer, 0.1% Kathon preservative, and 97.65% deionized water.

[0033] Preparation process: Deionized water is stirred at 1000 r / min in a room temperature environment of 25-35℃; polyethylene oxide is pre-dispersed with 1.5 times its mass of anhydrous ethanol and then added to the mixture, and stirred for 20 min until the system is completely transparent and homogeneous; the stirring speed is reduced to 400 r / min, and each main ingredient is added in sequence, and the next raw material is added after the single component is homogenized; finally, Kathon preservative is added and mixed well, filtered through 100 mesh, and allowed to stand for 20 min to defoam to obtain the finished product.

[0034] Performance tests: pH=7.0, Kc=2.0, residue rate 2.1%, 35% reduction in interfacial frictional resistance, 96.2% performance retention after 6 months of sealed storage at room temperature, with no stratification or precipitation.

[0035] Example 2 formulation by mass percentage: 0.15% polyethylene oxide, 1.0% fatty alcohol polyoxyethylene ether AEO-3, 0.3% sodium citrate dihydrate, 0.2% water-soluble polyether modified silicone oil, 0.2% polyether silicone-free defoamer, and 98.15% deionized water. The preparation process is the same as in Example 1, and the total mass percentage of each component is 100%.

[0036] Test performance: pH=6.9, Kc=1.8, residual rate 2.7%, interfacial frictional resistance reduced by 31%, stable performance in short-term field use.

[0037] Example 3 formulation by mass percentage: 0.25% polyethylene oxide, 2.0% fatty alcohol polyoxyethylene ether AEO-3, 0.7% sodium citrate dihydrate, 0.4% water-soluble polyether modified silicone oil, 0.3% polyether silicone-free defoamer, 0.15% Kathon preservative, and 96.2% deionized water. The preparation process is the same as in Example 1.

[0038] Performance tests: pH=7.1, Kc=2.2, residue rate 1.8%, interface friction resistance reduced by 38%, suitable for washing heavy dust and lightly oily glass.

[0039] Based on the formulation of Example 1, the amount of Kathon preservative added was adjusted to 0.05%, and the deionized water content was increased by the same mass. The proportions of other components, preparation process, and testing conditions remained unchanged. Test results: The finished product had a pH of 6.9, and after 6 months of sealed storage at room temperature, there was no stratification, no mold growth, and no precipitation. The performance retention rate was 93.5%, and the high-pressure rinsing residue rate was 2.4%, which meets the requirements for long-term storage and routine rinsing conditions. This effectively verifies the rationality and feasibility of the lower limit of Kathon addition of 0.05% in the claims.

[0040] Under the same test conditions, pure water has no rheological regulation or drag reduction effect. After high-pressure rinsing, the water film is scattered and uneven, the drying residue rate is 21.3%, the watermark is mottled and dense, and the rinsing effect is extremely poor.

[0041] Control sample: A commercially available mainstream neutral glass curtain wall cleaner, tested to contain sodium fatty alcohol polyoxyethylene ether sulfate, sodium citrate, conventional silicone defoamer, and purified water as its core components. It lacks high-molecular-weight rheology modifiers and employs a traditional strong wetting emulsification cleaning method, which is completely different from the rheology modulation + interface slip technology of this invention. The product was diluted at the recommended 1:100 ratio and tested in parallel with Example 1 under the same operating conditions.

[0042] Performance testing: High-pressure jetting produces a large amount of foam, resulting in severe disordered water flow and long water film retention time. The residual rate is 26.7%, and the interface resistance is reduced by only 12%. The rinsing effect is far inferior to that of this invention, and it cannot be adapted to unmanned high-pressure single-pass rinsing conditions.

[0043] The water-soluble polyether-modified silicone oil in Example 1 was removed, while the remaining components, proportions, and processes remained completely identical. The test showed a residue rate of 7.4%, with significant water retention and localized severe water accumulation on the glass surface, demonstrating that both the rheological bundle aggregation and interfacial slip mechanisms are indispensable, and the overall solution exhibits strong integrity.

[0044] Comparative Examples 4, 5, and 6 were identical to Example 1 in all aspects except for the molecular weight of polyethylene oxide (PEO), ensuring single-variable control. Comparative Example 4 (PEO with a molecular weight of 200,000): extremely weak clustering effect, Kc=1.3, residual rate 16.2%; Comparative Example 5 (PEO with a molecular weight of 400,000): only reached the critical clustering effect, Kc=1.5, residual rate 9.8%, failing to meet the residue-free effect; Comparative Example 6 (PEO with a molecular weight of 1,200,000): excellent residue-free effect, but poor solubility, prone to microgel formation, easy clogging of precision nozzles with long-term spraying, and poor equipment compatibility. Gradient experiments confirmed that the molecular weight range of 800,000–1,000,000 was the only optimal range.

[0045] Using the formulation of Example 1, tests were conducted under various water quality and pollution conditions: deionized water + light ash residue rate 2.1%; municipal tap water (150 mg / L hardness) + light ash residue rate 2.3%; medium-hard water (300 mg / L hardness) + heavy ash residue rate 2.5%; tap water + thin oil residue rate 2.8%. The residue rate under all conditions was ≤3%, demonstrating stable and reliable performance, proving that the technical effect of this invention has excellent universality and environmental adaptability.

Claims

1. A non-marking, self-slipping, rheology-modifying water-based glass rinsing additive, characterized in that, By mass percentage, it mainly consists of the following components: 0.15%–0.25% polyethylene oxide, 1.0%–2.0% fatty alcohol polyoxyethylene ether AEO-3, 0.3%–0.7% sodium citrate dihydrate, 0.2%–0.4% water-soluble polyether modified silicone oil, 0.2%–0.3% polyether silicone-free defoamer, and the balance being deionized water. The total mass percentage of all components is 100%.

2. The non-marking, self-slipping, rheology-modifying water-based glass rinsing additive according to claim 1, characterized in that, The weight-average molecular weight of the polyoxyethylene is 800,000 to 1,000,000.

3. The non-marking, self-slipping, rheology-modifying water-based glass rinsing additive according to claim 1, characterized in that, The additive also includes 0.05% to 0.15% of Kathon preservative by mass, wherein the Kathon preservative is a system of methylisothiazolinone and methylchloroisothiazolinone compounded in a mass ratio of 1:3; the mass of the added Kathon preservative is reduced by the mass of deionized water, etc., and the total mass percentage of each component is kept at 100%.

4. The non-marking, self-slipping, rheology-modifying water-based glass rinsing additive according to claim 1, characterized in that, The finished product of the additive has a pH value of 6.8 to 7.2, and is a neutral system.

5. The non-marking, self-slipping rheology-modifying water-based glass rinsing additive according to claim 3, characterized in that, By mass percentage, its composition is as follows: 0.2% polyethylene oxide, 1.5% fatty alcohol polyoxyethylene ether AEO-3, 0.5% sodium citrate dihydrate, 0.3% water-soluble polyether modified silicone oil, 0.25% polyether silicone-free defoamer, 0.1% Kathon preservative, and 97.65% deionized water.

6. A method for preparing the traceless self-slipping rheology-controlled glass rinsing water-based additive as described in claim 1, characterized in that, Includes the following steps: (1) At room temperature of 25-35℃, add the amount of deionized water in the formula to the stirred reactor, use a propeller-type stirring paddle with a diameter of 1 / 2 of the inner diameter of the reactor, and set the stirring speed to 800-1200 r / min for continuous stirring; after pre-wetting and dispersing the polyethylene oxide powder with 1-2 times its mass of anhydrous ethanol, slowly add it to the stirring system and continue stirring until the system is completely transparent, free of clumps and solid particles, to obtain a homogeneous polymer base liquid; (2) Reduce the stirring speed to 300-500 r / min, and add sodium citrate dihydrate, fatty alcohol polyoxyethylene ether AEO-3, water-soluble polyether modified silicone oil, and polyether silicone-free defoamer in sequence. After each component is completely dispersed and homogenized, add the next raw material. (3) After all the main ingredients are mixed, filter them with a 100-mesh filter to remove impurities, let them stand at room temperature for 15-30 minutes to defoam, and obtain a traceless self-slipping rheology-controlled glass rinsing water-based additive.

7. A method for preparing the traceless self-slipping rheology-controlled glass rinsing water-based additive as described in claim 3, characterized in that, Includes the following steps: (1) At room temperature of 25-35℃, add the amount of deionized water in the formula to the stirred reactor, use a propeller-type stirring paddle with a diameter of 1 / 2 of the inner diameter of the reactor, and set the stirring speed to 800-1200 r / min for continuous stirring; after pre-wetting and dispersing the polyethylene oxide powder with 1-2 times its mass of anhydrous ethanol, slowly add it to the stirring system and continue stirring until the system is completely transparent, free of clumps and solid particles, to obtain a homogeneous polymer base liquid; (2) Reduce the stirring speed to 300-500 r / min, and add sodium citrate dihydrate, fatty alcohol polyoxyethylene ether AEO-3, water-soluble polyether modified silicone oil, and polyether silicone-free defoamer in sequence. After each component is completely dispersed and homogenized, add the next raw material. (3) Add the amount of Kathon preservative in the formula under low-speed stirring at 300-500 r / min, and stir until the system is completely homogeneous; (4) The product is obtained by filtering with a 100-mesh filter to remove impurities and letting it stand at room temperature for 15-30 minutes to defoam.

8. The application of the additive as described in claim 1 or 3 in unmanned high-pressure jet washing of architectural glass curtain walls and photovoltaic tempered glass, characterized in that, The additive is diluted with water at a volume ratio of 1:80 to 1:100 when used, and is suitable for high-pressure washing equipment with pressure of 3 to 8 MPa, and is compatible with auxiliary washing of hard facades such as stone; wherein, the additive containing preservatives as described in claim 3 is suitable for long-term storage conditions and its performance is stable after storage.

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