Automobile windshield washer fluid and preparation method thereof

Abstract

The invention discloses an automobile windshield washer fluid and a preparation method thereof, and the automobile windshield washer fluid comprises the following components by mass: 2%-10% of ethylene glycol, 3%-30% of ethanol, 0.02%-0.1% of a nonionic surfactant, 0.02%-0.1% of an anionic surfactant, 0.001%-0.5% of a slow release agent, 0.2%-10% of an antifogging agent, 0.001%-0.2% of a pH regulator, and the balance of water, totaling 100%. The antifogging agent is a mixture of polyvinyl alcohol and hydrophobic alkane silane. According to the invention, the antifogging agent is formed by compounding polyvinyl alcohol and hydrophobic alkane silane, so that the antifogging period of the glass can be obviously prolonged.

Description

Technical Field

[0001] The invention relates to an automobile glass cleaner, in particular to an automobile glass water, and also to a preparation method of the automobile glass water. Background Art

[0002] Automobile glass water is a glass cleaning fluid that can quickly remove dirt and brightly clean automobile glass. It is one of the consumables for car maintenance. When a car is driving fast, the front windshield is prone to dirt. The main components of these dirt are mud, dust, gum, shellac, grease produced by the combustion of gasoline and diesel, insect remains, etc. If they are not cleaned up in time, it will not only affect the overall appearance of the car, but also interfere with the driver's field of vision, and may cause traffic accidents in serious cases. Automobile glass water can not only effectively remove dirt attached to the front windshield, but also has antifreeze, anti-fog, anti-static, lubricating and anti-corrosion effects. There are many types of existing glass water, but the anti-fog performance is poor.

[0003] The invention patent application with publication number CN102181326A discloses a glass cleaning agent and its application, and the invention patent application with publication number CN 111117786 A discloses an antifreeze type cleaning glass water for preventing glass fogging and its preparation method. These schemes all use organic solvents such as methanol, ethanol and ethylene glycol to lower the freezing point of the liquid, so that the glass water has antifreeze and anti-fogging capabilities. However, in this scheme, the demisting period of the glass water is short. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a car windshield washer water with a prolonged anti-fog cycle. Another purpose of the present invention is to provide a method for preparing car windshield washer water.

[0005] Technical solution: The automobile windshield water of the present invention comprises the following components by mass: 2% to 10% ethylene glycol, 3% to 30% ethanol, 0.02 to 0.1% nonionic surfactant, 0.02 to 0.1% anionic surfactant, 0.001 to 0.5% sustained-release agent, 0.2 to 10% antifogging agent, 0.001 to 0.2% pH regulator, and the balance is supplemented with water to 100%. The antifogging agent is a mixture of polyvinyl alcohol and hydrophobic alkane silane.

[0006] In the present invention, the anti-fogging agent is compounded by polyvinyl alcohol (PVA) and hydrophobic alkane silane, which can significantly improve the anti-fogging effect of glass.

[0007] Preferably, in the glass water, the proportion of polyvinyl alcohol is not less than 0.2%, and the proportion of hydrophobic alkane silane is not less than 0.5%. As the amount of anti-fogging agent increases, the defogging period of glass water is prolonged. Considering the cost comprehensively, the amount of anti-fogging agent added is preferably not more than 10%.

[0008] Preferably, in the glass water, the polyvinyl alcohol ratio is 0.25-1%, and the hydrophobic alkane silane ratio is 0.55-3%. If the ratio exceeds this range, the glass water will be easily flocculated when stored for a long time and heated at high temperature, and the performance of the glass water will be reduced.

[0009] Preferably, the glass water further comprises: 0.1-1% flavor and 0.0001-0.1% pigment.

[0010] Preferably, the glass water further comprises: 0.01-0.1% of a defoaming agent, and the defoaming agent is polyether-modified silicone oil.

[0011] Preferably, the pH regulator is triethanolamine, and the corrosion inhibitor is sodium metasilicate and / or benzotriazole.

[0012] Preferably, the anionic surfactant is a mixture of one or more of secondary alkyl sulfonate, dodecyl sulfonate, dodecylbenzene sulfonate, fatty acid polyoxyethylene ether sulfate, and alkyl succinate sulfonate. Different types of anionic surfactants have a slight effect on the cleaning performance of glass water, and secondary alkyl sulfonate is the best.

[0013] Preferably, the nonionic surfactant is fatty acid methyl ester ethoxylate and / or fatty alcohol polyoxyethylene ether. Different types of nonionic surfactants have a slight effect on the cleaning performance of glass water, and fatty acid methyl ester ethoxylate is the best.

[0014] Preferably, the hydrophobic silane is a hydrophobic alkane silane including one or more of methyltrimethoxysilane, octyltrimethoxysilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane, and octadecyltrimethoxysilane. Different hydrophobic silanes can achieve better anti-fogging effects.

[0015] The method for preparing the above-mentioned automobile windshield water comprises the following steps:

[0016] (1) mixing ethylene glycol, ethanol and water to obtain a mixed solution;

[0017] (2) Add nonionic surfactant and anionic surfactant to the mixed solution and stir; continue to add corrosion inhibitor and antifogging agent and stir;

[0018] (3) Add a defoaming agent to the product obtained in step (2), adjust the pH to 7.0-8.5 with a pH adjuster, filter, and obtain the liquid to obtain automobile windshield washer water.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) Long anti-fog period: The anti-fog effect of the existing glass water can last for about 7 days, while the anti-fog effect of the glass water of the present invention is superior and can last for 15 days; (2) Excellent cleaning performance and spreading performance: After the glass water of the present invention is sprayed onto the glass surface by the nozzle, it can spread on the glass surface in a very short time, covering the glass over a large area, reducing the tendency of the glass water to accumulate on the glass surface due to hydrophobicity, and preventing the glass water from sliding off quickly. The glass water wets various dirt and penetrates into the interior of the dirt, has strong cleaning ability, and avoids the formation of flow marks on the glass surface; (3) The glass water of the present invention has a low freezing point, a small overall fluctuation range of the system pH, and good stability under high temperature, strong light and low temperature conditions; (4) The preparation process is simple: the raw materials are readily available and can be prepared at room temperature. DETAILED DESCRIPTION

[0020] The technical scheme of the present invention is further described below in conjunction with the examples. Without additional explanation, the reagents used in the following examples are all commercially available reagents and are used directly without further purification.

[0021] Example 1: In this example, the addition ratio of each component is as follows by mass: 4% ethylene glycol, 15% ethanol, 0.08% fatty acid methyl ester ethoxylate (FMEE), 0.08% sodium primary alkyl sulfonate (PAS), 0.3% corrosion inhibitor, 0.5% polyvinyl alcohol (PVA), 1% dodecyltrimethoxysilane, 0.6% flavor, 0.005% pigment, 0.03% defoamer, and 0.02% triethanolamine: the balance is deionized water.

[0022] The preparation steps of glass water are as follows: the first step is to add ethylene glycol, ethanol and deionized water into a container, stir and mix evenly to obtain a mixed solution; the second step is to add FMEE and PAS into the mixed solution obtained in the first step, and stir until the mixture is evenly mixed; the third step is to add corrosion inhibitor, PVA, dodecyltrimethoxysilane, flavor and pigment thereto, and stir until the mixture is evenly mixed; the fourth step is to add a defoaming agent, and then adjust the pH value to 7.5-8.0 (will fluctuate) with triethanolamine, filter to remove insoluble matter, and take the liquid to obtain high-performance glass water.

[0023] Example 2: In this example, the addition ratio of each component is as follows by mass: ethylene glycol 4%, ethanol 10%, FMEE 0.08%, PAS 0.08%, corrosion inhibitor 0.3%, PVA 0.5%, dodecyl trimethoxy silane 1%, flavor 0.6%, pigment 0.005%, defoamer 0.01%, triethanolamine 0.02%: the balance is deionized water. The preparation steps of glass water are the same as those in Example 1.

[0024] Example 3: In this example, the addition ratio of each component is as follows by mass: ethylene glycol 4%, ethanol 15%, FMEE 0.04%, PAS 0.04%, corrosion inhibitor 0.3%, PVA 0.5%, dodecyltrimethoxysilane 1%, flavor 0.6%, pigment 0.005%, defoamer 0.03%, triethanolamine 0.02%: the balance is deionized water.

[0025] The preparation steps of glass water are as follows: the first step is to add ethylene glycol, ethanol and deionized water into a container, stir and mix evenly to obtain a mixed solution; the second step is to add FMEE and PAS into the mixed solution obtained in the first step, heat to 40°C, and stir until the mixture is evenly mixed; the third step is to add corrosion inhibitor, PVA, dodecyltrimethoxysilane, flavor and pigment, maintain 40°C, and stir until the mixture is evenly mixed; the fourth step is to stop heating, add defoaming agent, and then adjust the pH value to 7.5 with triethanolamine, filter to remove insoluble matter, and take liquid to obtain high-performance glass water.

[0026] Comparative Example 1: In this example, the addition ratio of each component is as follows by mass: ethylene glycol 4%, ethanol 15%, FMEE 0.08%, PAS 0.08%, corrosion inhibitor 0.1%, PVA 0.2%, dodecyl trimethoxy silane 0.5%, flavor 0.6%, pigment 0.005%, defoamer 0.03%, triethanolamine 0.02%: the balance is deionized water. The preparation steps of glass water are the same as those in Example 1 to obtain glass water.

[0027] Comparative Example 2: In this example, the addition ratio of each component is as follows: ethylene glycol 1%, ethanol 2%, FMEE 0.08%, PAS 0.08%, corrosion inhibitor 0.8%, PVA 0.2%, dodecyl trimethoxy silane 0.5%, flavor 0.6%, pigment 0.005%, defoamer 0.03%, triethanolamine 0.02% by mass: the balance is deionized water. The preparation steps of glass water are the same as those of Example 1. During the preparation of glass water, the components cannot be mixed evenly. The temperature is raised to 45°C and stirred in the second and third steps, but they still cannot be mixed evenly.

[0028] Comparative Example 3: In this embodiment, the addition ratio of each component is: ethylene glycol 1%, ethanol 5%, FMEE 0.08%, PAS 0.08%, corrosion inhibitor 0.8%, PVA 0.2%, dodecyl trimethoxy silane 0.5%, flavor 0.6%, pigment 0.005%, defoamer 0.03%, triethanolamine 0.02% by mass: the balance is deionized water. The preparation steps of glass water are the same as those in Example 1. During the preparation of glass water, the components cannot be mixed evenly.

[0029] According to the performance requirements and test method standards of automobile windshield defogging system GB / T 23436-2009 and GB 11556-1994, the performance tests were conducted on the glass water prepared in Examples 1 to 3 and Comparative Example 1, and the test results are shown in Table 1. It can be seen from the data in Table 1 that the glass water of the present invention can significantly extend the defogging cycle.

[0030] Table 1: Test results of glass water performance obtained in the examples and comparative examples

[0031]

Claims

1. A car windshield washer fluid, characterized in that: The composition comprises, by mass, 2% to 10% ethylene glycol, 3% to 30% ethanol, 0.02 to 0.1% nonionic surfactant, 0.02 to 0.1% anionic surfactant, 0.001 to 0.5% corrosion inhibitor, 0.2 to 10% antifog agent, 0.001 to 0.2% pH regulator, and the balance is supplemented with water to 100%. The antifog agent is a mixture of polyvinyl alcohol and hydrophobic alkane silane.

2. The automobile windshield washer water according to claim 1, characterized in that: In the glass water, the proportion of the polyvinyl alcohol is not less than 0.2%, and the proportion of the hydrophobic alkane silane is not less than 0.5%.

3. The automobile windshield washer water according to claim 1 or 2, characterized in that: In the glass water, the proportion of the polyvinyl alcohol is 0.25-1%, and the proportion of the hydrophobic alkane silane is 0.55-3%.

4. The automobile windshield washer water according to claim 1, characterized in that: The glass water also includes 0.01-0.1% of a defoamer, and the defoamer is polyether-modified silicone oil.

5. The automobile windshield washer water according to claim 1, characterized in that: The glass water also includes 0.1-1% of essence and 0.0001-0.1% of pigment.

6. The automobile windshield washer water according to claim 1, characterized in that: The pH regulator is triethanolamine, and the corrosion inhibitor is sodium metasilicate and / or benzotriazole.

7. The automobile windshield washer water according to claim 1, characterized in that: The anionic surfactant is a mixture of one or more of secondary alkyl sulfonate, dodecyl sulfonate, dodecylbenzene sulfonate, fatty acid polyoxyethylene ether sulfate, and alkyl succinate sulfonate.

8. The automobile windshield washer water according to claim 1, characterized in that: The nonionic surfactant is fatty acid methyl ester ethoxylate and / or fatty alcohol polyoxyethylene ether.

9. The automobile windshield washer water according to claim 1, characterized in that: The hydrophobic silane is a hydrophobic alkane silane including one or more of methyltrimethoxysilane, octyltrimethoxysilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane and octadecyltrimethoxysilane.

10. A method for preparing the automobile windshield water according to claim 1, comprising the following steps: (1) mixing ethylene glycol, ethanol and water to obtain a mixed solution; (2) adding nonionic surfactant and anionic surfactant to the mixed solution, stirring, and continuing to add corrosion inhibitor and antifogging agent, stirring; (3) Add a defoaming agent to the product obtained in step (2), adjust the pH to 7.0-8.5 with a pH adjuster, filter, and obtain the liquid to obtain automobile windshield washer water.

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