Low-temperature-resistant anti-freezing automobile windshield washer fluid and preparation method thereof

Abstract

The invention discloses a low-temperature-resistant anti-freezing automobile windshield washer fluid and a preparation method thereof, and relates to the technical field of automobile maintenance supplies. The cleaning agent comprises the following components: 15%-30% of methanol and ethanol, 8%-15% of ethylene glycol, 0.05%-0.2% of an OP-10 surfactant, 0.5%-2% of glycerol, 0.2%-1% of sodium chloride, 0.01%-0.04% of pigment, 0.01%-0.04% of essence, 0.2%-0.5% of triethanolamine, 0.01%-0.02% of a polydimethylsiloxane defoaming agent and 60%-70% of deionized water, wherein the ratio of ethanol to methanol is 2: 1. The automobile windshield washer fluid provided by the invention adopts a self-developed formula, meets the requirements of cleaning performance and safety stability, can realize a better low-temperature anti-freezing effect, has a freezing point of less than or equal to-30 DEG C, can quickly dissolve frost, is more efficient to use, and is suitable for the situation that an automobile is outdoors for a long time in winter.

Description

Technical Field

[0001] The invention relates to the technical field of automobile maintenance products, in particular to low-temperature resistant and antifreeze-resistant automobile windshield washer fluid and a preparation method thereof. Background Art

[0002] Windshield washer fluid is a type of fluid used to clean your windshield. The clarity of your windshield is closely linked to the driver's field of vision. When your windshield becomes less transparent, a spray of washer fluid can restore a clear, crisp view. This is especially true when driving at night, where dust on the glass scatters light. A spray of washer fluid is essential to maintain optimal windshield clarity.

[0003] Some existing windshield washes on the market suffer from poor antifreeze performance, limited functionality, poor frost dissolving performance, inconvenience in snowy weather, and complex production processes. Therefore, a windshield washer with superior antifreeze performance and frost dissolving performance is needed. We have developed a low-temperature-resistant windshield washer and its preparation method to address these issues.

[0004] The above information disclosed in this background technology is only for enhancing understanding of the background technology of the present invention and therefore it may contain information that does not constitute the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a low-temperature resistant and antifreeze-resistant automobile windshield washer fluid and a preparation method thereof, so as to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a low-temperature resistant and antifreeze-resistant automobile windshield washer fluid, comprising the following components: 15% to 30% of methanol and ethanol in total, 8% to 15% of ethylene glycol, 0.05% to 0.2% of OP-10 surfactant, 0.5% to 2% of glycerol, 0.2% to 1% of sodium chloride, 0.01% to 0.04% of pigment, 0.01% to 0.04% of flavor, 0.2% to 0.5% of triethanolamine, 0.01% to 0.02% of polydimethylsiloxane defoaming agent, and 60% to 70% of deionized water, wherein the ratio of ethanol to methanol is 2:1.

[0007] Preferably, the component ratio is: 20% methanol and ethanol in total, 10% ethylene glycol, 0.1% OP-10 surfactant, 1% glycerol, 0.6% sodium chloride, 0.02% pigment, 0.02% flavor, 0.25% triethanolamine, 0.01% polydimethylsiloxane defoaming agent, and 68% deionized water.

[0008] A method for preparing low-temperature resistant and antifreeze-resistant automobile windshield washer fluid comprises the following steps:

[0009] Step 1: Prepare saline solution

[0010] Prepare 50% to 60% of the required total amount of deionized water, slowly add sodium chloride to the water in batches, heat to 40°C to 50°C, and continue stirring until the sodium chloride is completely dissolved and the solution is clear and transparent. Stop heating and cool to 30°C to 40°C;

[0011] Step 2: Mixing alcohols

[0012] Slowly add methanol to the ethanol and mix well. Slowly add the alcohol mixture to the saline solution and continue stirring to form a uniform and transparent alcohol-salt-water mixture.

[0013] Step 3: Mix other materials

[0014] Add ethylene glycol to the alcohol-salt-water mixture and stir evenly, then add glycerin, OP-10 surfactant, and polydimethylsiloxane defoamer in sequence and stir evenly to obtain the main mixture;

[0015] Step 4: Post-processing

[0016] Measure the pH value of the main mixture, add triethanolamine while stirring continuously to adjust the pH value to 7.0-8.5, add the dissolved pigment to the main mixture, stir evenly, then add the flavor to the main mixture, stir evenly, then add the remaining deionized water to the main mixture and stir thoroughly;

[0017] Step 5: Filter

[0018] Filter the prepared glass water to remove trace impurities or incompletely dissolved particles;

[0019] Step 6: Let stand and fill

[0020] The filtered finished product is left to age for 24 to 48 hours to allow the bubbles to fully escape and the components to be fully compatible; after passing the quality inspection, it is filled and sealed.

[0021] Preferably, in step 2, stirring is continued for 5 to 10 minutes.

[0022] Preferably, in step 3, glycerin is pre-diluted with warm water at 40°C to 50°C and stirred for 5 minutes after addition. OP-10 is pre-dissolved with warm water at 40°C to 50°C and stirred for 10 to 15 minutes after addition. The polydimethylsiloxane defoamer is pre-diluted with warm water at 40°C to 50°C at a ratio of 1:5-10 and stirred for 5 to 10 minutes after addition.

[0023] Preferably, in step 4, the final stirring is performed for 20 to 30 minutes to ensure that all components are fully mixed and the system is uniform and stable.

[0024] Preferably, in step 5, filtration is performed using a 100-200 mesh filter or a 5 μm filter bag.

[0025] Preferably, in step 6, the filling is performed at a temperature of 10°C to 30°C.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The automobile windshield washer fluid of the present invention adopts a self-developed formula, meets the requirements of cleaning performance and safety and stability, can achieve better low-temperature antifreeze effect, and the freezing point can reach ≤-30°C. At the same time, it can quickly dissolve frost and is more efficient to use. It is suitable for situations where cars are outdoors for a long time in winter.

[0028] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0030] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Example 1

[0032] A low-temperature resistant and antifreeze-resistant automobile windshield washer fluid comprises the following components: 20% in total of methanol and ethanol, 10% ethylene glycol, 0.1% OP-10 surfactant, 1% glycerol, 0.6% sodium chloride, 0.02% pigment, 0.02% flavor, 0.25% triethanolamine, 0.01% polydimethylsiloxane defoaming agent, and 68% deionized water.

[0033] A method for preparing low-temperature resistant and antifreeze-resistant automobile windshield washer fluid comprises the following steps:

[0034] Step 1: Prepare saline solution

[0035] Prepare 50% of the required total amount of deionized water, slowly add sodium chloride to the water in batches, heat to 40°C, and continue stirring until the sodium chloride is completely dissolved and the solution is clear and transparent. Stop heating and cool to 30°C;

[0036] Step 2: Mixing alcohols

[0037] Slowly add methanol to ethanol and mix well. Slowly add the alcohol mixture to the saline solution and continue stirring for 5 to 10 minutes to form a uniform and transparent alcohol-salt-water mixture.

[0038] Step 3: Mix other materials

[0039] Add ethylene glycol to the alcohol-salt-water mixture and stir evenly for 5 minutes, then add glycerin, OP-10 surfactant, and polydimethylsiloxane defoamer in sequence and stir evenly to obtain a main mixture; glycerin is diluted with 40°C warm water in advance and stirred for 5 minutes after addition; OP-10 is dissolved in 40°C warm water in advance and stirred for 10-15 minutes after addition; polydimethylsiloxane defoamer is diluted with 40°C warm water in advance at a ratio of 1:5 and stirred for 5-10 minutes after addition;

[0040] Step 4: Post-processing

[0041] Measure the pH value of the main mixture, add triethanolamine while stirring continuously to adjust the pH value to 7.0-8.5, add the dissolved pigment to the main mixture, stir evenly for 5 minutes, then add the flavor to the main mixture, stir evenly for 5 minutes, then add the remaining deionized water to the main mixture, stir thoroughly for 20-30 minutes to ensure that all components are fully mixed and the system is homogeneous and stable;

[0042] Step 5: Filter

[0043] Filter the prepared glass water through a 100-200 mesh filter to remove trace impurities or incompletely dissolved particles;

[0044] Step 6: Let stand and fill

[0045] The filtered finished product is left to age for 24 to 48 hours to allow bubbles to fully escape and the components to be fully compatible; after passing the quality inspection, it is filled and sealed at a temperature of 10℃ to 30℃.

[0046] Control group 1: commercially available glass water with the same freezing point (-30°C).

[0047] Control group 2: pure water, simulating an unprotected state.

[0048] In order to further verify the performance of the automobile windshield water of the present invention, the following performance test experiments were conducted on Example 1, Control Group 1 and Control Group 2.

[0049] 1. Freezing Point Determination: 20 ml of each sample from three groups was placed into a clean, dry freezing point test tube. The tube was placed in a programmed cooling apparatus and cooled at a rate of 1°C / min. The crystallization temperature (i.e., the temperature at which ice crystals first appear) was observed. This test was repeated three times and the average value was calculated. The test results are shown in Table 1 below.

[0050] Table 1. Freezing point test results

[0051] Group Test 1 (℃) Test 2 (℃) Test 3 (℃) Average freezing point (℃) Example 1 -36.2 -35.8 -36.5 -36.2 Control group 1 -31.5 -30.9 -31.2 -31.2 Control group 2 -0.5 -0.3 -0.4 -0.4

[0052] From the above, it can be seen that the automobile windshield water of the present invention has a lower freezing point under the preferred ratio, which can reach ≤-35°C, showing a better low-temperature anticoagulation level and is more suitable for harsh low-temperature outdoor environments in winter.

[0053] 2. Low-Temperature Fluidity: Using a rotational viscometer, test the dynamic viscosity of the sample at 20°C, -10°C, -20°C, and -25°C. Compare the low-temperature fluidity threshold to the automotive standard: viscosity ≤ 5 mPa·s at -25°C. The test results are shown in Table 2 below.

[0054] Table 2. Low temperature fluidity test results

[0055] Group Example 1 (mPa·s) Control group 1 (mPa·s) 20℃ 1.2 1.3 -10℃ 1.8 2.1 -20℃ 2.5 3.2 -25℃ 3.8 4.9

[0056] As can be seen from the above, the fluidity of the samples in Example 1 and Control Group 1 is <5 mPa·s at -25°C, which meets the requirements. The low-temperature fluidity of Example 1 is better.

[0057] 3. Ice Melting Rate Test: Three glass plates of the same size (20 cm x 15 cm) were prepared and covered with a 1 mm thick layer of artificial ice made from frozen deionized water. 10 ml of the sample was sprayed onto the ice surface and the time it took for the ice to completely melt into water was recorded. The ambient temperature was set at -15°C in a constant temperature box. The test results are shown in Table 3 below.

[0058] Table 3. Ice melting speed test results

[0059] Group Ice melting time (seconds) Effect Description Example 1 42±3 The ice layer dissolves evenly without any residue Control group 1 68±5 Thin ice remaining on the edge Control group 2 >300 Only puddles formed, the ice did not melt

[0060] As can be seen from the above, the automobile windshield washer water of the present invention has a faster ice-melting speed than commercially available products. When used outdoors in winter, it can quickly melt frost, making it more convenient and efficient to use.

[0061] 4. Cleaning Power Test: 5g of diatomaceous earth, 0.5ml of engine oil, 0.2g of carbon powder, and 10ml of water were added to simulate dirt and applied to a glass plate. The glass plate was then dried. Wipers were applied 10 times at a constant pressure and frequency, and the light transmittance recovery value was measured. A spectrophotometer was used at a wavelength of 550nm. The test results are shown in Table 4 below.

[0062] Table 4. Cleaning power test results

[0063] Group Initial light transmittance (%) Light transmittance after cleaning (%) Improvement value (%) Example 1 52.3 91.7 39.4 Control group 1 53.1 85.2 32.1 Control group 2 51.8 62.5 10.7

[0064] As can be seen from the above, the transmittance of the automobile windshield washer of the present invention is restored to >91%, showing excellent cleaning power.

[0065] 5. Foam Volume Test: Place 50 ml of sample in a graduated cylinder, shake vertically 10 times, let stand for 30 seconds, and record the foam volume. The test results are shown in Table 5 below.

[0066] Table 5. Foam volume test results

[0067] Group Foam volume (ml) Defoaming time (s) Example 1 2.5 <15 Control group 1 8.0 45 Control group 2 1.0 -

[0068] As can be seen from the above, the automobile windshield washer water of the present invention produces less foam and has a fast defoaming speed, which can greatly improve the user experience.

[0069] 6. Safety test: pH value is measured directly by pH meter. Methanol is tested by gas chromatography to verify the actual content.

[0070] Test results: The pH of Example 1 was 7.8, which was within the safe range. The methanol content was 6.65%, which was accurate, non-toxic and controllable.

[0071] 7. Low-temperature storage stability: The samples were placed at -30°C for 14 days and observed for stratification / precipitation, as well as for turbidity after returning to room temperature. Freezing point tests were also repeated to verify the precipitation of antifreeze components. The test results are shown in Table 6 below.

[0072] Table 6. Stability test results

[0073] Group Stratification / precipitation Freezing point change (℃) Example 1 none -36.2→-35.9, up 0.3 Control group 1 Slight flocculation -31.2→-29.7, up 1.5

[0074] From the above, it can be seen that the automobile windshield washer water of the present invention has no obvious stratification / precipitation phenomenon when placed in a -30°C environment for 14 days, and no antifreeze component is precipitated when stored at -30°C for 14 days. Compared with commercially available products, it has excellent low-temperature storage stability.

[0075] 8. Wiper Blade Simulation Test: Three sets of new and old wiper blades were immersed in the sample at room temperature for 72 hours. The rubber hardness change before and after immersion was measured, and the surface was observed for swelling and cracking. The test results are shown in Table 7 below.

[0076] Table 7. Wiper blade simulation test results

[0077] Group Hardness change (ΔShoreA) Surface state Example 1 +1.2 Smooth and unchanged Control group 1 +3.8 Slightly sticky Control group 2 -2.5 cracked

[0078] As can be seen from the above, the automobile windshield washer rubber of the present invention has good protective properties and is beneficial to extending the service life of the windshield wipers.

[0079] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0080] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Any changes, modifications, replacements and variations of the above embodiments by ordinary technicians in this field within the scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-temperature resistant and antifreeze type automobile windshield washer fluid, characterized in that: The invention comprises the following components: 15% to 30% of methanol and ethanol in total, 8% to 15% of ethylene glycol, 0.05% to 0.2% of OP-10 surfactant, 0.5% to 2% of glycerol, 0.2% to 1% of sodium chloride, 0.01% to 0.04% of pigment, 0.01% to 0.04% of essence, 0.2% to 0.5% of triethanolamine, 0.01% to 0.02% of polydimethylsiloxane defoaming agent, and 60% to 70% of deionized water, wherein the ratio of ethanol to methanol is 2:

1.

2. The low-temperature resistant and antifreeze-resistant automobile windshield washer fluid according to claim 1, characterized in that: The specific proportions of the components are: 20% of methanol and ethanol in total, 10% of ethylene glycol, 0.1% of OP-10 surfactant, 1% of glycerol, 0.6% of sodium chloride, 0.02% of pigment, 0.02% of flavor, 0.25% of triethanolamine, 0.01% of polydimethylsiloxane defoaming agent, and 68% of deionized water.

3. The method for preparing a low-temperature resistant and antifreeze-resistant automobile windshield water according to any one of claims 1 to 2, characterized in that: The steps include: Step 1: Prepare saline solution Prepare 50% to 60% of the required total amount of deionized water, slowly add sodium chloride to the water in batches, heat to 40°C to 50°C, and continue stirring until the sodium chloride is completely dissolved and the solution is clear and transparent. Stop heating and cool to 30°C to 40°C; Step 2: Mixing alcohols Slowly add methanol to the ethanol and mix well. Slowly add the alcohol mixture to the saline solution and continue stirring to form a uniform and transparent alcohol-salt-water mixture. Step 3: Mix other materials Add ethylene glycol to the alcohol-salt-water mixture and stir evenly, then add glycerin, OP-10 surfactant, and polydimethylsiloxane defoamer in sequence and stir evenly to obtain the main mixture; Step 4: Post-processing Measure the pH value of the main mixture, add triethanolamine while stirring continuously to adjust the pH value to 7.0-8.5, add the dissolved pigment to the main mixture, stir evenly, then add the flavor to the main mixture, stir evenly, then add the remaining deionized water to the main mixture and stir thoroughly; Step 5: Filter Filter the prepared glass water to remove trace impurities or incompletely dissolved particles; Step 6: Let stand and fill The filtered finished product is left to age for 24 to 48 hours to allow the bubbles to fully escape and the components to be fully compatible; after passing the quality inspection, it is filled and sealed.

4. The method for preparing low-temperature resistant and antifreeze automobile windshield washer water according to claim 3, characterized in that: In step 2, stirring is continued for 5 to 10 minutes.

5. The method for preparing low-temperature resistant and antifreeze automobile windshield washer water according to claim 3, characterized in that: In step 3, glycerin is diluted in advance with warm water at 40°C to 50°C and stirred for 5 minutes after addition. OP-10 is dissolved in advance with warm water at 40°C to 50°C and stirred for 10 to 15 minutes after addition. The polydimethylsiloxane defoamer is diluted in advance with warm water at 40°C to 50°C at a ratio of 1:5-10 and stirred for 5 to 10 minutes after addition.

6. The method for preparing low-temperature resistant and antifreeze automobile windshield washer water according to claim 3, characterized in that: In step 4, the mixture is stirred for 20 to 30 minutes to ensure that all components are fully mixed and the system is uniform and stable.

7. The method for preparing low-temperature resistant and antifreeze automobile windshield washer water according to claim 3, characterized in that: In step 5, filtration is performed using a 100-200 mesh filter or a 5 μm filter bag.

8. The method for preparing low-temperature resistant and antifreeze automobile windshield washer water according to claim 3, characterized in that: In the step 6, the filling is carried out at an environment of 10°C to 30°C.

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