A cleaning solution based on car care and a method for its preparation

Abstract

This invention discloses a car care-based cleaning fluid and its preparation method, comprising the following raw materials by mass percentage: 10-18% composite surfactant, 5-9% modified polydimethylsiloxane, 4-7% carnauba wax-based particles, 3-6% modified diatomaceous earth, 2.5-5% hydrogenated castor oil, 2-4.5% polyethylene glycol, 1-2% limonene, and the remainder being water. The car care-based cleaning fluid prepared by this invention can effectively remove dirt and improve cleaning results, while also enhancing gloss and scratch resistance, and simultaneously improving stain resistance and self-cleaning properties.

Description

Technical Field

[0001] This invention relates to a car care-based cleaning fluid and its preparation method, belonging to the field of car cleaning technology. Background Technology

[0002] Vehicles are mostly exposed to the air, where dust and particulate matter adhere to their surfaces, forming grime or reacting with moisture and oxygen to create a contamination layer. Additionally, oily particles in the air, oil pollutants from the road (asphalt, diesel, or industrial oil), sticky resins from trees, honeydew from insects, and bird droppings adhere to vehicle surfaces, forming stubborn stains. This grime, contamination layer, and stains make vehicles dirty, affecting their appearance and shine. Regular car washing is crucial for maintaining a vehicle's appearance and value. However, some car wash solutions are not ideal, especially for stubborn stains like oily or sticky resins, requiring repeated washing, which is time-consuming, water-intensive, and can damage the paint. To remove stubborn stains, some wash solutions contain corrosive ingredients like acids and alkalis, which can corrode the paint over time, causing it to lose its shine, fade, or even peel. Furthermore, most car wash solutions currently available offer limited functionality and cannot meet consumers' diverse needs for additional car care features such as anti-static and polishing properties. Summary of the Invention

[0003] In response to at least one problem in the prior art, the present invention provides a car care-based cleaning fluid and its preparation method, which can effectively remove dirt and improve cleaning effect, while also improving gloss and scratch resistance, and enhancing stain resistance and self-cleaning properties.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a car care-based cleaning fluid, comprising the following raw materials by mass percentage: 10-18% composite surfactant, 5-9% modified polydimethylsiloxane, 4-7% carnauba wax-based particles, 3-6% modified diatomaceous earth, 2.5-5% hydrogenated castor oil, 2-4.5% polyethylene glycol, 1-2% limonene, and the remainder being water.

[0005] Preferably, the water content in the cleaning solution is 56-64% by mass.

[0006] Preferably, the modified diatomaceous earth is obtained by modifying diatomaceous earth, polyaluminum chloride and chitosan.

[0007] Preferably, the modified nano-diatomite is prepared by: pre-treating diatomite by soaking in dilute hydrochloric acid and calcination, first reacting it with polyaluminum chloride by heating, and then reacting it with chitosan by heating to obtain modified diatomite.

[0008] Preferably, the particle size of the diatomaceous earth is 2~5μm.

[0009] Preferably, the mass ratio of diatomaceous earth, polyaluminum chloride, and chitosan is 100:5~8:10~15.

[0010] Preferably, the carnauba wax-based particles are carnauba wax modified with nano-TiO2.

[0011] Preferably, the carnauba wax-based particles are 25~40μm in size.

[0012] Preferably, the preparation of the carnauba wax-based particles is as follows: carnauba wax is stirred and heated with a TiO2 dispersion with a pH of 9-10, then dispersed at high speed and cooled with water to form a Pickering emulsion, which is then spray-dried and screened.

[0013] Preferably, the mass ratio of carnauba wax to TiO2 is 6~10:1.

[0014] Preferably, the composite surfactant comprises three of the following: alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, and oleic acid diethanolamide, and at least one of sorbitan laurate or sulfosuccinate.

[0015] Preferably, the composite surfactant comprises alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate, and sulfosuccinate.

[0016] Preferably, in the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 6~8:4:5~6:2.5:1.

[0017] Preferably, the modified polydimethylsiloxane is composed of amino-modified polydimethylsiloxane and polyether-modified polydimethylsiloxane.

[0018] Preferably, in the modified polydimethylsiloxane, the mass ratio of the amino-modified polydimethylsiloxane to the polyether-modified polydimethylsiloxane is 3~4:2.

[0019] Preferably, a method for preparing a car care-based cleaning fluid includes the following steps: dissolving polyethylene glycol in water, sequentially adding a composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth, and carnauba wax-based particles at a speed of 500-800 rpm, stirring and mixing evenly, then dispersing and emulsifying at a speed of 5000-8000 rpm for 10-15 minutes, and then uniformly mixing 2-3 times at a pressure of 20-30 MPa to obtain the car care-based cleaning fluid.

[0020] The beneficial effects of this invention are as follows: The cleaning fluid of this invention, using appropriate amounts of modified diatomaceous earth, composite surfactant, modified polydimethylsiloxane, carnauba wax-based particles, hydrogenated castor oil, polyethylene glycol, and limonene, not only efficiently cleans and removes dirt from the vehicle surface but also provides a cleaning effect. The synergistic effect of the modified diatomaceous earth, carnauba wax-based particles, modified polydimethylsiloxane, hydrogenated castor oil, and polyethylene glycol raw materials forms a dense hydrophobic protective layer, enhancing stain resistance and reducing water stains and electrostatically adsorbed dust, thus improving self-cleaning performance. In addition, the synergistic effect of appropriate amounts of carnauba wax-based particles, hydrogenated castor oil, polyethylene glycol, and modified polydimethylsiloxane enhances adhesion to the car paint, forming a smooth and durable multi-layered protective film, improving the gloss, scratch resistance, and abrasion resistance of the car surface, and also enhancing the long-lasting stability of the car surface gloss. Detailed Implementation

[0021] The following is a clear and complete description of the technical solutions in the implementation of this invention. The described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents, instruments, or components used that do not specify the manufacturer are all conventional products that can be purchased commercially.

[0022] The present invention provides a car care-based cleaning fluid comprising the following raw materials by mass percentage: 10-18% composite surfactant, 5-9% modified polydimethylsiloxane, 4-7% carnauba wax-based particles, 3-6% modified diatomaceous earth, 2.5-5% hydrogenated castor oil, 2-4.5% polyethylene glycol, 1-2% limonene, and the remainder being water.

[0023] In a further technical solution of the present invention, the modified diatomaceous earth is obtained by modifying diatomaceous earth, polyaluminum chloride and chitosan; the carnauba wax-based particles are carnauba wax modified with nano-TiO2.

[0024] A further technical solution of the present invention, wherein the modified nano-diatomite is prepared as follows: diatomite is pretreated by soaking in dilute hydrochloric acid and calcination, then reacted with polyaluminum chloride by heating, and then reacted with chitosan by heating to obtain modified diatomite. A preferred preparation process is as follows: diatomite is soaked in dilute hydrochloric acid for 5-6 hours, rinsed until neutral, calcined at 450-500℃ for 2-3 hours, then added to a polyaluminum chloride solution, stirred and heated to 70-80℃ for 1-2 hours, centrifuged, dried, then added to a chitosan solution containing acetic acid, stirred and heated to 40-50℃ for 2-3 hours, pH adjusted to 5.5-6.5, centrifuged, washed with water until neutral, and dried to obtain modified diatomite.

[0025] More specifically, the preparation steps of modified nano-diatomite are as follows: A) Soak 2-5 μm diatomite in a 5-10% wt. dilute hydrochloric acid solution for 5-6 hours, rinse until neutral, and then calcine at 450-500℃ for 2-3 hours to obtain pretreated diatomite; B) Dissolve polyaluminum chloride in deionized water to form a 5-10% wt. polyaluminum chloride solution, add the pretreated diatomite, stir and heat to 70-80℃ for 1-2 hours, centrifuge, and dry at 60-70℃ to obtain primary modified diatomite; C) Dissolve chitosan in a 5% wt. acetic acid aqueous solution to form a 3-5% wt. chitosan solution, add the primary modified diatomite, stir and heat to 40-50℃ for 2-3 hours, adjust the pH to 5.5-6.5, centrifuge, wash with water until neutral, and dry at 60-70℃ to obtain modified diatomite.

[0026] In a further technical solution of the present invention, the particle size of the diatomaceous earth is 2~5μm; the mass ratio of the diatomaceous earth, polyaluminum chloride and chitosan is 100:5~8:10~15.

[0027] In a further embodiment of the present invention, the carnauba wax-based particles are 25~40μm in size.

[0028] A further technical solution of the present invention involves the preparation of carnauba wax-based particles as follows: carnauba wax is reacted with a TiO2 dispersion at pH 9-10 by stirring and heating, followed by high-speed dispersion and water cooling to form a Pickering emulsion, which is then spray-dried and screened. A preferred preparation process is as follows: TiO2 is added to deionized water containing polyethylene glycol and the pH is adjusted to 9-10. The mixture is then ultrasonically dispersed to form a uniform TiO2 dispersion. Carnauba wax is added, stirred, and heated to 75-85°C for 60-90 minutes. The mixture is then dispersed at high speed at 15000-18000 rpm for 5-8 minutes, water-cooled to form a stable Pickering emulsion, spray-dried, and screened to obtain carnauba wax-based particles with a particle size of 25-40 μm and uniformly distributed nano-TiO2 on the surface.

[0029] More specifically, the preparation steps of carnauba wax-based particles are as follows: a) Add nano-TiO2 to deionized water containing polyethylene glycol, stir evenly, adjust the pH to 9-10, and sonicate at 200-300W for 20-30 minutes to form a uniformly dispersed TiO2 dispersion of 2-3% wt.; b) Add carnauba wax to the TiO2 dispersion, stir and heat to 75-85℃ for 60-90 minutes, then disperse at high speed at 15000-18000 rpm for 5-8 minutes, and cool to room temperature to form a stable Pickering emulsion; c) Spray dry the Pickering emulsion, sieve, and obtain carnauba wax-based particles with a particle size of 25-40 μm and uniformly distributed nano-TiO2 on the surface.

[0030] In a further embodiment of the present invention, the mass ratio of carnauba wax to TiO2 is 6-10:1; the amount of polyethylene glycol used is 0.1-0.2% of the mass of TiO2.

[0031] A further technical solution of the present invention is that the composite surfactant comprises three of the following: alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, and oleic acid diethanolamide, and at least one of sorbitan laurate or sulfosuccinate; preferably, the composite surfactant comprises alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate, and sulfosuccinate; preferably, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate, and sulfosuccinate in the composite surfactant is 6~8:4:5~6:2.5:1.

[0032] In a further technical solution of the present invention, the modified polydimethylsiloxane is composed of amino-modified polydimethylsiloxane and polyether-modified polydimethylsiloxane; preferably, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane in the modified polydimethylsiloxane is 3~4:2.

[0033] The preparation method of the car care-based cleaning fluid of the present invention includes the following steps: dissolving polyethylene glycol in water, and sequentially adding a composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth, and carnauba wax-based particles at a speed of 500-800 rpm, stirring and mixing evenly, then dispersing and emulsifying at a speed of 5000-8000 rpm for 10-15 minutes, and then uniformly mixing 2-3 times at a pressure of 20-30 MPa to obtain the car care-based cleaning fluid.

[0034] Preparation Example 1: Preparation of a modified nano-diatomite, the specific steps are as follows: Step 1: Soak 2-5μm diatomaceous earth in a 5% wt. dilute hydrochloric acid solution for 6 hours, rinse until neutral, and then calcine at 480℃ for 2 hours to obtain pretreated diatomaceous earth. Step 2: Dissolve polyaluminum chloride in deionized water to form an 8% wt. polyaluminum chloride solution, add pretreated diatomaceous earth, stir and heat to 75℃ for 1 hour, centrifuge and dry at 60~70℃ to obtain primary modified diatomaceous earth; Step 3: Dissolve chitosan in a 5% wt. acetic acid aqueous solution to form a 4% wt. chitosan solution, add the pre-modified diatomaceous earth, stir and heat to 45℃ for 2 hours, adjust the pH to 5.5~6.5, centrifuge, wash with water until neutral, and dry at 60~70℃ to obtain modified diatomaceous earth; The mass ratio of diatomaceous earth, polyaluminum chloride, and chitosan is 100:6.5:12.

[0035] Preparation Example 2: Preparation of carnauba wax-based particles, the specific steps are as follows: Step 1: Add nano-TiO2 to deionized water containing polyethylene glycol, stir evenly, adjust the pH to 9-10, and sonicate at 260W for 25 minutes to form a uniformly dispersed 2.5%wt. TiO2 dispersion. Step 2: Add carnauba wax to TiO2 dispersion, stir and heat to 80℃ for 75 min, then disperse at high speed at 16500 rpm for 6 min, and cool to room temperature with water to form a stable Pickering emulsion. Step 3: Spray dry the Pickering emulsion and sieve it to obtain carnauba wax-based particles with a particle size of 25~40μm; The mass ratio of carnauba wax to TiO2 is 9:1; the amount of polyethylene glycol used is 0.16% of the mass of TiO2.

[0036] Example 1 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide and dehydrated sorbitan laurate is 6:4:5:2.5. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3:2. The specific steps for preparing the cleaning solution are as follows: Weigh each raw material according to the above mass percentages, dissolve polyethylene glycol in water, and add the composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth, and carnauba wax-based particles in sequence at a speed of 600 rpm. Stir and mix evenly, then disperse and emulsify at a speed of 5000 rpm for 15 minutes, and then homogenize twice at a pressure of 20~30 MPa to obtain the cleaning solution based on car care.

[0037] Example 2 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 15% composite surfactant, 5% modified polydimethylsiloxane, 7% carnauba wax-based particles of Preparation Example 2, 6% modified diatomaceous earth of Preparation Example 1, 5% hydrogenated castor oil, 3.5% polyethylene glycol, 1% limonene, and 57.5% limonene. The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The specific steps for preparing the cleaning solution are as follows: Weigh each raw material according to the above mass percentages, dissolve polyethylene glycol in water, and add the composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth, and carnauba wax-based particles in sequence at a speed of 500 rpm. Stir and mix evenly, then disperse and emulsify at a speed of 6200 rpm for 12 minutes, and then uniformly mix three times at a pressure of 20~30 MPa to obtain a cleaning solution based on car care.

[0038] Example 3 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 18% composite surfactant, 8% modified polydimethylsiloxane, 4% carnauba wax-based particles of Preparation Example 2, 5% modified diatomaceous earth of Preparation Example 1, 2.5% hydrogenated castor oil, 4.5% polyethylene glycol, 1.5% limonene, and 56.5% limonene. The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The specific steps for preparing the cleaning solution are as follows: Weigh each raw material according to the above mass percentages, dissolve polyethylene glycol in water, and add the composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth, and carnauba wax-based particles in sequence at a speed of 800 rpm. Stir and mix evenly, then disperse and emulsify at a speed of 8000 rpm for 10 minutes, and then uniformly mix three times at a pressure of 20~30 MPa to obtain a car care-based cleaning solution.

[0039] Example 4 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 16% composite surfactant, 7% modified polydimethylsiloxane, 6% carnauba wax-based particles of Preparation Example 2, 5.5% modified diatomaceous earth of Preparation Example 1, 3% hydrogenated castor oil, 2.5% polyethylene glycol, 1.5% limonene, and 58.5% limonene. In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide and sulfosuccinate is 6:4:5:1. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3:2. The preparation of the cleaning solution is the same as in Example 2.

[0040] Example 5 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 15% composite surfactant, 7% modified polydimethylsiloxane, 7% carnauba wax-based particles of Preparation Example 2, 5.5% modified diatomaceous earth of Preparation Example 1, 3% hydrogenated castor oil, 2.5% polyethylene glycol, 1.5% limonene, and 58.5% limonene. In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 5.5:5:6:2:1. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3:2. The preparation of the cleaning solution is the same as in Example 2.

[0041] Example 6 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 15% composite surfactant, 5% modified polydimethylsiloxane, 7% carnauba wax-based particles of Preparation Example 2, 5.5% modified diatomaceous earth of Preparation Example 1, 5% hydrogenated castor oil, 3% polyethylene glycol, 1% limonene, and 58.5% limonene. In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 6:4:5:2.5:1. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3:2. The preparation of the cleaning solution is the same as in Example 2.

[0042] Example 7 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 12% composite surfactant, 6% modified polydimethylsiloxane, 6% carnauba wax-based particles of Preparation Example 2, 4.5% modified diatomaceous earth of Preparation Example 1, 3.5% hydrogenated castor oil, 4% polyethylene glycol, 2% limonene, and 62% limonene; In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 7:4:5.5:2.5:1. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3.5:2; The preparation of the cleaning solution is the same as in Example 2.

[0043] Example 8 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 15% composite surfactant, 5% modified polydimethylsiloxane, 5% carnauba wax-based particles of Preparation Example 2, 6% modified diatomaceous earth of Preparation Example 1, 3.5% hydrogenated castor oil, 3% polyethylene glycol, 2% limonene, and 61% citric acid. In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 8:4:6:2.5:1. In the modified polydimethylsiloxane, the mass ratio of amino-modified polydimethylsiloxane to polyether-modified polydimethylsiloxane is 3.5:2; The preparation of the cleaning solution is the same as in Example 2.

[0044] Example 9 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 18% composite surfactant, 9% modified polydimethylsiloxane, 7% carnauba wax-based particles from Preparation Example 2, 6% modified diatomaceous earth from Preparation Example 1, 5% hydrogenated castor oil, 4.5% polyethylene glycol, 2% limonene, and 48.5% limonene. The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0045] Example 10 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 5% modified polydimethylsiloxane, 4% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 2.5% hydrogenated castor oil, 2% polyethylene glycol, 1% limonene, and 73% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0046] Comparative Example 1 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 8.5% composite surfactant, 9% modified polydimethylsiloxane, 4% carnauba wax-based particles of Preparation Example 2, 6.5% modified diatomaceous earth of Preparation Example 1, 33.5% hydrogenated castor oil, 2% polyethylene glycol, 2.5% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0047] Comparative Example 2 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 18.5% composite surfactant, 5% modified polydimethylsiloxane, 4% carnauba wax-based particles of Preparation Example 2, 2.5% modified diatomaceous earth of Preparation Example 1, 3.5% hydrogenated castor oil, 2% polyethylene glycol, 0.5% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0048] Comparative Example 3 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 12% composite surfactant, 9.5% modified polydimethylsiloxane, 2.5% carnauba wax-based particles of Preparation Example 2, 4% modified diatomaceous earth of Preparation Example 1, 5.5% hydrogenated castor oil, 1.5% polyethylene glycol, 0.5% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0049] Comparative Example 4 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 4% modified polydimethylsiloxane, 7.5% carnauba wax-based particles of Preparation Example 2, 6.5% modified diatomaceous earth of Preparation Example 1, 2% hydrogenated castor oil, 5% polyethylene glycol, 1% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0050] Comparative Example 5 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 7% modified polydimethylsiloxane, 5.5% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 0% hydrogenated castor oil, 8.5% polyethylene glycol, 2% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0051] Comparative Example 6 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 12% composite surfactant, 13% modified polydimethylsiloxane, 0% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0052] Comparative Example 7 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% polydimethylsiloxane, 6% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; Polydimethylsiloxane was used instead of modified polydimethylsiloxane; the composite surfactant was the same as in Example 1. The preparation of the cleaning solution is the same as in Example 1.

[0053] Comparative Example 8 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles (Preparation Example 2), 3% diatomaceous earth with a particle size of 2-3 μm, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; Diatomaceous earth with a particle size of 2-3 μm was used instead of the modified diatomaceous earth in Preparation Example 1; wherein, the composite surfactant and modified polydimethylsiloxane were the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0054] Comparative Example 9 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles from Preparation Example 2, 3% modified diatomaceous earth, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The modified diatomaceous earth in this comparative example was prepared as follows: Step 1: 2-5 μm diatomaceous earth was soaked in a 5% wt. dilute hydrochloric acid solution for 6 hours, rinsed until neutral, and then calcined at 480℃ for 2 hours to obtain pretreated diatomaceous earth; Step 2: Chitosan was dissolved in a 5% wt. acetic acid aqueous solution to form a 4% wt. chitosan solution, the pretreated diatomaceous earth was added, stirred and heated to 45℃ for 2 hours, the pH was adjusted to 5.5-6.5, centrifuged, washed with water until neutral, and dried at 60-70℃ to obtain modified diatomaceous earth; wherein, the mass ratio of diatomaceous earth to chitosan was 100:12; The preparation of the cleaning solution is the same as in Example 1.

[0055] Comparative Example 10 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles from Preparation Example 2, 3% modified diatomaceous earth, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The modified diatomaceous earth in this comparative example was prepared as follows: Step 1: 2-5 μm diatomaceous earth was soaked in a 5% wt. dilute hydrochloric acid solution for 6 hours, rinsed until neutral, and then calcined at 480℃ for 2 hours to obtain pretreated diatomaceous earth; Step 2: Polyaluminum chloride was dissolved in deionized water to form an 8% wt. polyaluminum chloride solution, the pretreated diatomaceous earth was added, stirred and heated to 75℃ for 1 hour, centrifuged, and dried at 60-70℃ to obtain modified diatomaceous earth; wherein, the mass ratio of diatomaceous earth to polyaluminum chloride was 100:6.5; The preparation of the cleaning solution is the same as in Example 1.

[0056] Comparative Example 11 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles from Preparation Example 2, 3% modified diatomaceous earth, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation process of the modified diatomaceous earth in this comparative example is as follows: Step 1: Soak 2-5 μm diatomaceous earth in a 5% wt. dilute hydrochloric acid solution for 6 hours, rinse until neutral, and then calcine at 480℃ for 2 hours to obtain pretreated diatomaceous earth; Step 2: Stir the silane coupling agent KH560 with the pretreated diatomaceous earth at 45℃ for 2 hours to obtain modified diatomaceous earth; wherein, the mass ratio of diatomaceous earth to chitosan is 100:3; The preparation of the cleaning solution is the same as in Example 1.

[0057] Comparative Example 12 A car care-based cleaning fluid comprises the following raw materials, by weight percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; Carnauba wax replaces carnauba wax-based particles; wherein the composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0058] Comparative Example 13 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The preparation process of the carnauba wax-based particles in this comparative example is the same as that in Example 1, except that the carnauba wax-based particles are 50~70μm. The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0059] Comparative Example 14 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; The preparation process of the carnauba wax-based particles in this comparative example is as follows: Step 1: Nano-ZnO is added to deionized water containing polyethylene glycol, stirred evenly, and the pH is adjusted to 9-10. The mixture is then ultrasonically treated at 260W for 25 minutes to form a uniformly dispersed 2.5% wt. ZnO dispersion. Step 2: Carnauba wax is added to the ZnO dispersion, stirred, and heated to 80℃ for 75 minutes. Then, it is dispersed at high speed at 16500 rpm for 6 minutes and cooled to room temperature to form a stable Pickering emulsion. Step 3: The Pickering emulsion is spray-dried and sieved to obtain carnauba wax-based particles with a particle size of 25-40 μm. The mass ratio of carnauba wax to ZnO is 9:1, and the amount of polyethylene glycol used is 0.16% of the ZnO mass. The composite surfactant and modified polydimethylsiloxane are the same as in Example 1; The preparation of the cleaning solution is the same as in Example 1.

[0060] Comparative Example 15 A car care-based cleaning fluid comprises the following raw materials, by mass percentage: 10% composite surfactant, 9% modified polydimethylsiloxane, 6% carnauba wax-based particles of Preparation Example 2, 3% modified diatomaceous earth of Preparation Example 1, 4% hydrogenated castor oil, 2% polyethylene glycol, 2% limonene, and 64% limonene; In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, and oleic acid diethanolamide is 6:4:5; the modified polydimethylsiloxane is the same as in Example 1. The preparation of the cleaning solution is the same as in Example 1.

[0061] Car wash liquid performance evaluation test: 1. Cleaning Performance: A scratch test method was used. Specifically, 1g, 2g, 1.5g, and 4g of silica particles with average particle sizes of 0.0015mm, 0.025mm, 0.2mm, and 2mm were evenly applied to aluminum foil. 2.5mL of an equal volume of oil and 2mL of an equal volume of cypress-secreted adhesive resin were sprayed onto the foil, and the cleaning solutions prepared in Examples 1-10 and Comparative Examples 1-15 were sprayed onto the foil with the same force for wiping. Clean water was used for wiping using the same method as a blank example. The roughness, reflectivity, and color of the wiped aluminum foil were tested; measurements were taken 10 times at different locations, and the average value was taken. The roughness of unwiped, brand-new aluminum foil was 0.005mm. Roughness reflects the degree of abrasion on the aluminum foil by abrasive particles; higher abrasion indicates poorer scratch resistance and wear resistance, lower reflectivity, and poorer gloss. The reflectivity (%) of brand new aluminum foil is 100%, reflecting the cleanliness of adhesive resin, oil, and dust. Higher reflectivity indicates better cleanliness and a better gloss; higher reflectivity also indicates a closer approximation to the initial value. The chromaticity (%) of brand new aluminum foil is also 100%, reflecting the cleanliness of oil and adhesive resin. Higher cleanliness of oil and adhesive resin results in a higher chromaticity that is closer to the initial value. The results are shown in Table 1.

[0062] 2. Hydrophobic Properties: A flat sheet material with the same surface material as the car (for ease of measurement) was selected. The sheet material was cleaned using the cleaning solutions prepared in Examples 1-10 and Comparative Examples 1-15. Then, 5 μL of deionized water was dropped onto the surface of the sheet material, and the contact angle (CA, °) between the car surface and the sheet material was measured. Measurements were taken 10 times at different locations, and the average value was taken. A larger contact angle indicates better hydrophobicity of the solid surface, indicating better stain resistance and self-cleaning ability. The sheet material was cleaned with clean water using the same method as a blank example. The flat sheet material was then placed in a 0.76 W / m... 2 The gloss retention rate (%) was tested after 14 days of treatment under ultraviolet light conditions of 340nm, 60℃, and 50% RH. The higher the retention rate, the better the gloss durability. The results are shown in Table 1.

[0063] 3. Self-cleaning performance: After washing the car with the cleaning solutions prepared in Examples 1-10 and Comparative Examples 1-14, dust was blown onto the car surface, and then water droplets were sprayed onto it. The dust removal rate (%) of the vehicle was tested. The higher the dust removal rate, the better the self-cleaning performance. Clean water was used for cleaning in the same way as a blank example. The results are shown in Table 1.

[0064] Table 1 Performance Evaluation Results

[0065] As shown in Table 1 above, the cleaning solutions used in Examples 1-10, which consist of appropriate amounts of composite surfactants, modified polydimethylsiloxane, carnauba wax-based particles, modified diatomaceous earth, hydrogenated castor oil, polyethylene glycol, limonene, and water, can achieve efficient cleaning of car surfaces, effectively reduce scratches, improve gloss, scratch resistance, and abrasion resistance, enhance stain resistance and self-cleaning properties, and improve the long-lasting stability of car surface gloss.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit and essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning fluid based on car care, characterized in that, The product contains the following raw materials by mass percentage: 10-18% composite surfactant, 5-9% modified polydimethylsiloxane, 4-7% carnauba wax-based particles, 3-6% modified diatomaceous earth, 2.5-5% hydrogenated castor oil, 2-4.5% polyethylene glycol, 1-2% limonene, and the remainder is water.

2. The car care-based cleaning fluid according to claim 1, characterized in that, The modified diatomaceous earth is obtained by modifying diatomaceous earth, polyaluminum chloride and chitosan.

3. The car care-based cleaning fluid according to claim 1, characterized in that, The modified nano-diatomite is prepared by: diatomite being pretreated by soaking in dilute hydrochloric acid and calcination, then reacting with polyaluminum chloride by heating, and then reacting with chitosan by heating to obtain modified diatomite. The particle size of the diatomaceous earth is 2~5μm; the mass ratio of the diatomaceous earth, polyaluminum chloride, and chitosan is 100:5~8:10~15.

4. The car care-based cleaning fluid according to claim 1, characterized in that, The carnauba wax-based particles are 25~40μm in size.

5. The car care-based cleaning fluid according to claim 1, characterized in that, The carnauba wax-based particles are carnauba wax particles modified with nano-TiO2.

6. A car care-based cleaning fluid according to claim 1 or 5, characterized in that, The preparation of the carnauba wax-based particles is as follows: carnauba wax is stirred and heated with a TiO2 dispersion with a pH of 9-10, then dispersed at high speed and cooled with water to form a Pickering emulsion, which is then spray-dried and screened. The mass ratio of carnauba wax to TiO2 is 6~10:

1.

7. The car care-based cleaning fluid according to claim 1, characterized in that, The composite surfactant comprises three of the following: alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, and oleic acid diethanolamide, and at least one of sorbitan lauryl ester or sulfosuccinate. The modified polydimethylsiloxane is composed of amino-modified polydimethylsiloxane and polyether-modified polydimethylsiloxane.

8. A car care-based cleaning fluid according to claim 7, characterized in that, The composite surfactant consists of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate, and sulfosuccinate.

9. A car care-based cleaning fluid according to claim 1, 7, or 8, characterized in that, In the composite surfactant, the mass ratio of alkyl glycoside, sodium fatty alcohol polyoxyethylene ether sulfate, oleic acid diethanolamide, sorbitan laurate and sulfosuccinate is 6~8:4:5~6:2.5:

1. In the modified polydimethylsiloxane, the mass ratio of the amino-modified polydimethylsiloxane to the polyether-modified polydimethylsiloxane is 3~4:

2.

10. A method for preparing a car care-based cleaning fluid as described in claim 1, characterized in that, The specific steps are as follows: dissolve polyethylene glycol in water, and add the composite surfactant, limonene, hydrogenated castor oil, modified polydimethylsiloxane, modified diatomaceous earth and carnauba wax-based particles in sequence at a speed of 500-800 rpm. Stir and mix evenly, then disperse and emulsify at a speed of 5000-8000 rpm for 10-15 minutes, and then homogenize 2-3 times at a pressure of 20-30 MPa to obtain a car care-based cleaning solution.

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