Water-soluble fully-synthetic knitting oil and preparation method thereof

Abstract

The invention provides water-soluble fully-synthetic knitting oil and a preparation method thereof, and relates to the technical field of knitting oil. The cutting fluid comprises a glucose type gemini surfactant, an anti-wear reagent at extreme pressure, an emulsifier, an anti-rust agent, an alkali retention agent and the balance of water. The preparation method comprises the following steps: adding deionized water into a reaction kettle, starting stirring and controlling at a first stirring speed; sequentially adding an anti-wear reagent at extreme pressure, an emulsifier, an anti-rust agent and an alkali retention agent into the reaction kettle, and continuously stirring to form a solution; and slowly adding the surfactant into the solution in batches, after all the surfactant is added, increasing the stirring speed, continuously stirring, standing, cooling to room temperature, and filtering to obtain the product. According to the water-soluble fully-synthetic knitting oil provided by the invention, mineral oil is not used as a lubricating main body, but a brand new system taking the water-soluble lubricant as a core is constructed, the unprecedented easy-to-clean characteristic is realized while the excellent lubricating property is ensured, meanwhile, the environmental protection property is ensured, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of knitting machine oil technology, and in particular to a water-soluble fully synthetic knitting oil and its preparation method. Background Technology

[0002] Knitting machine oil is a key auxiliary material that ensures the high-speed and stable operation of knitting machinery. Its main function is to lubricate moving parts such as knitting needles and sinkers, reducing wear and heat generation.

[0003] Currently, the traditional knitting machine oils widely used in the industry are formulated with a large amount of mineral oil as the base oil and main lubricant, typically accounting for over 90%, supplemented with small amounts of emulsifiers, extreme pressure anti-wear agents, rust inhibitors, and other additives. However, this traditional knitting oil, which is mainly composed of mineral oil, has the following drawbacks.

[0004] Although emulsifiers are added to the formula to allow for emulsification and removal during subsequent washing, this process consumes a significant amount of water. More importantly, the washing process produces complex, oily emulsion wastewater that is difficult and costly to treat, and environmentally unfriendly. Furthermore, maintaining a high proportion of mineral oil is necessary to ensure lubrication; however, adding emulsifiers is required to improve cleaning performance. These two aspects are inherently contradictory within the same system, often sacrificing thoroughness for lubrication, which can lead to invisible oil film residue on the fabric, affecting subsequent dyeing and finishing processes.

[0005] Therefore, there is an urgent need in this field for a new type of knitting machine oil that can simultaneously achieve both lubrication and easy cleaning performance. Summary of the Invention

[0006] In order to improve the problems of existing knitting machine oils, such as difficulty in cleaning and easy pollution, and the contradiction between lubrication performance and cleaning performance, this application provides a water-soluble fully synthetic knitting oil and its preparation method.

[0007] In a first aspect, this application provides a water-soluble fully synthetic knitting oil, employing the following technical solution: A water-soluble fully synthetic knitting oil, comprising the following components by weight percentage: 5%-15% glucose-type Gemini surfactant, 5%-15% extreme pressure anti-wear agent, 2%-3% emulsifier, 1%-3% rust inhibitor, 5%-8% alkali retention agent, and the balance being water.

[0008] Optionally, the mass ratio of the surfactant to the extreme pressure anti-wear agent is 2-3:1.

[0009] Optionally, the extreme pressure anti-wear agent is fatty alcohol polyoxyethylene ether phosphate.

[0010] Optionally, the emulsifier is an alcohol ether carboxylate surfactant or a fatty alcohol polyoxyethylene ether surfactant.

[0011] Optionally, the rust inhibitor is an ammonium phosphate salt.

[0012] Optionally, the alkali retainer is triethanolamine.

[0013] Secondly, this application provides a method for preparing a water-soluble fully synthetic knitting oil, using the following technical solution: A method for preparing a water-soluble fully synthetic knitting oil includes the following steps: Step S1: Add the prescribed amount of deionized water to the reactor, start stirring and control it at the first stirring rate; Step S2: While maintaining the first stirring rate, add the formulated amounts of extreme pressure anti-wear agent, emulsifier, rust inhibitor and alkali retainer to the reactor in sequence, and continue stirring for 10-20 minutes until all components are completely dissolved and a homogeneous solution is formed; Step S3: Under continuous stirring, slowly and in batches add glucose-type gemini surfactant to the solution in step S2. After all of it has been added, increase the stirring rate to the second stirring rate and continue stirring for 30-45 minutes until a homogeneous, transparent and stable solution is formed. Step S4: Allow the transparent solution obtained in step S3 to stand and cool to room temperature, then filter it to obtain the water-soluble fully synthetic knitting oil.

[0014] Optionally, the first stirring rate is 300-500 rpm, and the second stirring rate is 600-800 rpm.

[0015] In summary, this application includes at least one of the following beneficial effects: 1. The water-soluble fully synthetic knitting oil provided in this application does not use mineral oil as the main lubricant, but instead constructs a brand-new system with water-soluble lubricant as the core. While ensuring excellent lubrication performance, it achieves unprecedented easy-to-clean properties, while also ensuring environmental protection and reducing costs.

[0016] 2. The extreme pressure anti-wear agent used in this application can form a solid lubricating film on the metal surface, and its lubrication performance meets or even exceeds the working conditions of high-speed knitting machines, thus successfully meeting the lubrication requirements of knitting machine oil.

[0017] 3. This application introduces glucose-type gemini surfactant into water-soluble fully synthetic knitting oil, which is prepared using natural glucose as raw material. It not only has excellent cleaning ability, but also greatly improves the environmental protection characteristics of the product. It can quickly dissolve and diffuse when in contact with water, achieving instant cleaning. Oil stains on the fabric surface can be easily washed away with water without a complicated emulsification process, leaving no residue.

[0018] 4. The formula of this application does not contain mineral oil that is difficult to biodegrade, and does not produce oily emulsion wastewater after cleaning, which greatly reduces the environmental burden from the source.

[0019] 5. The water-soluble fully synthetic knitting oil provided in this application is a highly concentrated water-based formula that can be diluted significantly for use. The consumption per machine is much lower than that of traditional oil-based products, and it also greatly reduces the cost of subsequent cleaning, resulting in significant overall economic benefits. Attached Figure Description

[0020] Figure 1 These are images of the abrasion marks from long-wear tests of the water-soluble fully synthetic knitting oils of Examples 1-3 of this application, where a corresponds to Example 1, b corresponds to Example 2, and c corresponds to Example 3. Figure 2 These are images of the abrasion marks from long abrasion tests of the water-soluble fully synthetic knitting oils of Examples 4-6 of this application, where d corresponds to Example 4, e corresponds to Example 5, and f corresponds to Example 6. Figure 3 These are images of the abrasion marks from the water-soluble fully synthetic knitting oils of Examples 7-9 of this application after long abrasion tests, where g corresponds to Example 7, h corresponds to Example 8, and i corresponds to Example 9; Figure 4 These are images of the abrasion marks from long abrasion tests of the water-soluble fully synthetic knitting oils of Examples 10-12 of this application, where j corresponds to Example 10, k corresponds to Example 11, and m corresponds to Example 12. Figure 5 These are images of the abrasion marks from the water-soluble fully synthetic knitting oils of Comparative Examples 1-2 of this application after long-term abrasion testing, where p corresponds to Comparative Example 1 and q corresponds to Comparative Example 2. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The glucose-type gemini surfactants used in the following examples and comparative examples of this application were all prepared according to the method of Example 1 in Chinese Invention Patent CN104974185B.

[0023] Example 1: Example 1 provides a water-soluble fully synthetic knitting oil, the specific raw material composition of which is as follows: 15% glucose-type Gemini surfactant, 5% extreme pressure anti-wear agent, 3% emulsifier, 1% rust inhibitor, 6% alkali retention agent, and 70% water. Among them, the extreme pressure anti-wear agent is fatty alcohol polyoxyethylene ether phosphate, from Geniphos AEP-98 of Shangqin Company; the emulsifier is an alcohol ether carboxylate surfactant, from Genifol 4290 of Shangqin Company; the rust inhibitor is ammonium phosphate salt, from Geniexeral 101 of Shangqin Company; and the alkali retention agent is triethanolamine, from Yangzi Petrochemical BASF.

[0024] The preparation method of water-soluble fully synthetic knitting oil is as follows: S1: Add deionized water to the reactor as the base solvent, start stirring and control the speed at 400 rpm; S2: While maintaining stirring, add extreme pressure anti-wear agent, emulsifier, rust inhibitor and alkali retention agent to the reactor in sequence, and continue stirring for 20 minutes until all additives are completely dissolved and a homogeneous solution is formed; S3: While stirring continuously, slowly and in batches add glucose-type gemini surfactant. After all of it has been added, increase the stirring speed to 800 rpm and continue stirring for 30 minutes until a homogeneous, transparent and stable solution is formed. S4: Allow the obtained transparent solution to stand and cool to room temperature, then filter it through a filter screen to remove any trace amounts of insoluble matter or impurities that may be present, thus obtaining the final colorless and transparent water-soluble knitting oil product.

[0025] Examples 2-12: Examples 2-12 are basically the same as Example 1, except that the proportions and types of some reaction raw materials are different. Please see Table 1 for details.

[0026] In Examples 7-12, the emulsifier used was a fatty alcohol polyoxyethylene ether surfactant; in Examples 7-9, the emulsifier used was AEO-9, which came from Yangzi Petrochemical BASF; and in Examples 10-12, the emulsifier used was 1307, which also came from Yangzi Petrochemical BASF.

[0027] Comparative Examples 1-2: Comparative Examples 1-2 are basically the same as Example 1, except that the proportions of some reaction raw materials are different, as shown in Table 1.

[0028] Table 1. Raw material ratios for Examples 1-12 and Comparative Examples 1-2

[0029] The water-soluble fully synthetic knitting oils obtained in Examples 1-12 and Comparative Examples 1-2 were diluted 10 times with water (oil-water mass ratio 1:9) and used as test solutions for the following test items.

[0030] Test Item 1: Long-term wear test Test instrument: Xiamen Tianji MS-10A four-ball friction tester; Test conditions: motor speed: 1200rpm, initial temperature: 40℃, pressure rating: 40Kg; long grinding time: 30min; Test method is as follows.

[0031] 1. Preheat the four-ball friction testing machine and set the parameters; 2. Set the long-wear parameters, referring to standard GB / T3142; 3. Add the corresponding weights according to the test level; 4. Place three steel balls in the oil cup and one steel ball in the spindle, and tighten them; 5. Pour the oil sample to be tested into the oil cup, with the liquid level consistent with the scale line on the inner wall of the oil cup, approximately 15mL; 6. Place the oil cup containing the oil sample under the spindle, lower the lever arm, add the weights, and lower the spindle oil cup retaining ring; 7. Turn on the motor switch to start the test. After the test is completed, first turn off the motor switch, and then record the wear scar diameter. The specific test results are shown in Table 2.

[0032] Test Item 2: Rust Prevention Test The test was conducted according to the IP287 standard. 1. Draw a 35mm wide square outline in the middle of the filter paper as the test area; 2. Place the filter paper at the bottom of the petri dish, and spread 2g of iron filings in a single layer to completely cover the test area; 3. Pour 2ml of test solution onto the surface of the iron filings to completely wet them, then cover the petri dish with the lid and maintain a room temperature of 25℃; 4. After 2 hours, remove the filter paper from the petri dish, rinse it with water and dry it; 5. Inspect the filter paper and determine the number of rust spots or the rust area on each filter paper (judgment criteria: no rust spots are defined as level 0, several rust spots are defined as level 1, a dozen rust spots are defined as level 2, dozens of rust spots are defined as level 3, and large rust spots are defined as level 4). Determine the percentage of contaminated area on each sheet of paper. The test results are shown in Table 2.

[0033] Test item 3: Cleanability test The cleaning rate of the test solution was determined according to the test procedure of 5.4 Cleaning ability test (mass method) in standard JB / T 4323-2019 "Water-based metal cleaning agents". The test oil was artificial oil. The test results are shown in Table 2.

[0034] Table 2 Test results of Examples 1-12 and Comparative Examples 1-2

[0035] As can be seen from the results in Table 2, the water-soluble fully synthetic knitting oil formulations provided in Examples 1-12 of this application can simultaneously impart excellent lubricity and easy cleaning properties to the product through the synergistic compounding of specific types and amounts of glucose-type gemini surfactants and extreme pressure anti-wear agents.

[0036] A comparison of the results of Example 1 with those of Comparative Examples 1 and 2 shows that the wear scar diameter of Comparative Examples 1 and 2 increased significantly and the lubrication performance decreased substantially. This indicates that there is a significant synergistic effect between the glucose-type gemini surfactant and the extreme pressure anti-wear agent AEP-98, and neither can be dispensed with.

[0037] The comparison of Examples 1-3 shows that, with other components remaining constant, as the amount of glucose-type gemini surfactant decreased from 15% to 5%, the wear scar diameter increased from 0.340 mm to 0.402 mm, indicating that its amount has a significant impact on lubricity.

[0038] A comparison of Examples 1-6 with Examples 7-12 shows that, with other components being equal, Examples 1-6 using alcohol ether carboxylates exhibited superior wear scar diameters. This indicates that the type of emulsifier also affects product performance, and emulsifier 4290 has better compatibility with the core system, further enhancing the stability of the lubrication system or the strength of the oil film.

[0039] The comparison between Example 1 and Comparative Examples 1 and 2 shows that the combination of glucose-type gemini surfactant and extreme pressure anti-wear agent AEP-98 may form a micelle structure or complex that is more easily washed away by water, rather than the oil film that is easily left behind by traditional oil agents, thus greatly improving the cleaning performance of the product.

[0040] The rust prevention performance of Examples 1-12 and Comparative Examples 1-2 is all grade 0, which indicates that the ammonium phosphate salt rust inhibitor provides sufficient rust prevention protection for the entire system under the alkaline environment provided by the triethanolamine base retainer.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water-soluble fully synthetic knitting oil, characterized in that, By weight percentage, it includes the following components: 5%-15% glucose-type Gemini surfactant, 5%-15% extreme pressure anti-wear agent, 2%-3% emulsifier, 1%-3% rust inhibitor, 5%-8% alkali retention agent, and the balance being water.

2. The water-soluble fully synthetic knitting oil according to claim 1, characterized in that, The mass ratio of the surfactant to the extreme pressure anti-wear agent is 2-3:

1.

3. The water-soluble fully synthetic knitting oil according to claim 1, characterized in that, The extreme pressure anti-wear agent is fatty alcohol polyoxyethylene ether phosphate.

4. The water-soluble fully synthetic knitting oil according to claim 1, characterized in that, The emulsifier is an alcohol ether carboxylate surfactant or a fatty alcohol polyoxyethylene ether surfactant.

5. The water-soluble fully synthetic knitting oil according to claim 1, characterized in that, The rust inhibitor is an ammonium phosphate salt.

6. The water-soluble fully synthetic knitting oil according to claim 1, characterized in that, The alkali retainer is triethanolamine.

7. The method for preparing water-soluble fully synthetic knitting oil according to any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Add the prescribed amount of deionized water to the reactor, start stirring and control it at the first stirring rate; Step S2: While maintaining the first stirring rate, add the formulated amounts of extreme pressure anti-wear agent, emulsifier, rust inhibitor and alkali retainer to the reactor in sequence, and continue stirring for 10-20 minutes until all components are completely dissolved and a homogeneous solution is formed; Step S3: Under continuous stirring, slowly and in batches add glucose-type gemini surfactant to the solution in step S2. After all of it has been added, increase the stirring rate to the second stirring rate and continue stirring for 30-45 minutes until a homogeneous, transparent and stable solution is formed. Step S4: Allow the transparent solution obtained in step S3 to stand and cool to room temperature, then filter it to obtain the water-soluble fully synthetic knitting oil.

8. The water-soluble fully synthetic knitting oil according to claim 7, characterized in that, The first stirring rate is 300-500 rpm, and the second stirring rate is 600-800 rpm.

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