Water-soluble knitting oiling agent as well as preparation method and application thereof

Abstract

The invention belongs to the field of lubricating auxiliaries, and particularly relates to a water-soluble knitting oil agent and a preparation method and application thereof. According to the water-soluble knitting oiling agent provided by the invention, the random fatty alcohol polyether is taken as the base oil, and the random fatty alcohol polyether is compounded with the extreme pressure anti-wear agent, the anti-friction agent and other components by regulating and controlling the type and dosage of the random fatty alcohol polyether, so that the knitting oiling agent with excellent lubricity, wear resistance and water solubility is prepared, and the problems of oil needles and oil spots can be effectively reduced. In addition, the knitting oil agent has extremely high degradability, is safe to the environment and is suitable for popularization and application.

Description

Technical Field

[0001] The present application belongs to the field of lubricating additives, and more specifically, relates to a water-soluble knitting oil, a preparation method and application thereof. Background Art

[0002] Knitting oil is a lubricating agent used in the production process of large circular knitting machines. It can provide good lubrication and protection for knitting needles, sinkers, triangles, inner and outer grooves and other equipment components, and reduce knitting needle consumption. During the use of knitting oil, common usage problems such as oil needle grinding, machine jamming, and oil needles may occur. The problems of needle grinding and machine jamming can be solved by adjusting the circular knitting machine components and replacing the oil to improve the usage status, but the oil needle problem has always been a pain point that is difficult to solve in the circular knitting machine textile industry. Oil needles refer to the vertical continuous or intermittent oily strips with oil stains on the fabric surface due to operational or mechanical problems during the weaving process. When dyeing, the coloring effect of these stripes is different from that of normal fabrics, resulting in continuous (wide and narrow) or intermittent dark stripes (oil-containing stripes) on the finished fabric surface. High-end knitted fabric customers in the market are very sensitive to oil needles. The fabric cost of such customers is high, and oil needle problems will cause great economic losses.

[0003] Existing knitting oils are mainly compounded from antioxidants, extreme pressure anti-wear agents, antifriction agents, oiliness agents, emulsifiers and base oils. Mineral white oils such as No. 20 white oil and No. 30 white oil are usually used as base oils. Such knitting oils have serious oil needle problems during use, and require additional post-processing such as heavy oil removal, secondary water washing to remove oil, and cloth repair to improve the oil needle problem. The process is complicated and increases the post-process cost, which is not conducive to promotion and application. In addition, such knitting oils can form a water-in-oil system in water to dissolve the oil in water, but the emulsified system may experience water-oil separation during storage. At the same time, in the post-process dyeing and finishing process of the fabric woven with the knitting oil, the cloth washing temperature is high, and the knitting oil is easy to demulsify and stratify. The demulsified knitting oil may be stained on the cloth surface, resulting in oil paths or oil spots in the post-process dyeing, which seriously affects the yield of the cloth.

[0004] Therefore, there is a need for a knitting oil that can improve or solve the problems of oil needles and oil spots. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of the present application is to provide a water-soluble knitting oil, its preparation method and application, aiming to provide a knitting oil with excellent lubricity and wear resistance and miscible with water, which can improve or solve the problems of oil needles and oil spots.

[0006] To achieve the above-mentioned purpose, the present application provides a water-soluble knitting oil, which includes an extreme pressure anti-wear agent, a friction reducing agent, an antioxidant, a rust inhibitor and a random fatty alcohol polyether;

[0007] The mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 90wt% to 99wt%.

[0008] In some embodiments, the water-soluble knitting oil comprises, by weight, 0.5 to 4 parts of extreme pressure anti-wear agent, 0.2 to 4 parts of friction reducer, 0.1 to 1 part of antioxidant, 0.05 to 1 part of rust inhibitor and 90 to 99 parts of random fatty alcohol polyether.

[0009] Preferably, the structural formula of the random fatty alcohol polyether is as follows:

[0010]

[0011] Wherein, R is a C4-C18 alkyl group, m is an integer selected from 8-16, and n is an integer selected from 4-12.

[0012] Preferably, the mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 95wt% to 99wt%.

[0013] Further preferably, the water-soluble knitting oil comprises, by weight, 0.5-2 parts of extreme pressure anti-wear agent, 0.2-2 parts of friction reducer, 0.1-0.5 parts of antioxidant, 0.05-0.5 parts of rust inhibitor and 95-99 parts of random fatty alcohol polyether.

[0014] Preferably, the extreme pressure anti-wear agent is a phosphorus-based extreme pressure anti-wear agent.

[0015] More preferably, the phosphorus-based extreme pressure anti-wear agent is selected from one or more of ammonium phosphate salts, alkyl phosphites, phosphates and ammonium thiophosphate salts.

[0016] Preferably, the above-mentioned friction reducing agent is one or more of phosphates and phosphites.

[0017] Preferably, the antioxidant is a phenolic antioxidant.

[0018] Preferably, the rust inhibitor is one or more of benzotriazole derivatives, olefin succinic acid monoesters, phosphates and amides.

[0019] Another object of the present application is to provide a method for preparing the above-mentioned water-soluble knitting oil, comprising the following steps:

[0020] The random fatty alcohol polyether is mixed with an extreme pressure anti-wear agent, a friction reducing agent, an antioxidant and a rust preventive according to a proportion to prepare a water-soluble knitting oil.

[0021] Another object of the present application is to provide an application of the above-mentioned water-soluble knitting oil as a lubricating aid for large circular knitting machine textile equipment.

[0022] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0023] (1) The water-soluble knitting oil provided by the present application uses random fatty alcohol polyether as the base oil, and the mass percentage of random fatty alcohol polyether in the water-soluble knitting oil is 90wt% to 99wt%, and is compounded with extreme pressure anti-wear agents, anti-friction agents and other components to synergistically improve the lubricity, anti-wear and water solubility of the knitting oil, and can effectively solve the problems of oil needles and oil spots. In addition, the above-mentioned water-soluble knitting oil has extremely high degradability, is safe for the environment, and is easy to promote and apply.

[0024] (2) The water-soluble knitting oil provided by the present application can enhance the lubricity of the knitting oil and the solubility of the oil in water by adding random fatty alcohol polyether of appropriate type and amount. Among them, the high lubricity enables the knitting oil to maintain long-lasting good wear resistance at low oil content. In actual use, the oil needle phenomenon can be effectively avoided from the source by reducing the amount of knitting oil added; the characteristic of being miscible with water makes the knitting oil dissolve well in water and wash away even if it is stained on the fabric, and will not affect other subsequent dyeing and finishing processes.

[0025] (3) Compared with the existing knitting oil, the water-soluble knitting oil provided by the present application can be miscible with water in any proportion to form a transparent solution, significantly improving the washing effect of the knitting oil on the fabric. When the fabric stained with the water-soluble knitting oil is washed with clean water, the degreasing rate can reach 96%. In addition, the fabric stained with the water-soluble knitting oil will not demulsify in the subsequent dyeing and finishing process, which can ensure that the fabric is completely degreased and the subsequent dyeing is uniform, effectively improving the finished product rate of fabric dyeing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the effect of dyeing the grey cloth stained with water-soluble knitting oil after degreasing. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] The term "circular knitting machine" refers to a type of weft knitting machine in the textile industry that is used to weave yarn into various styles of woven fabrics.

[0029] The term "water-soluble knitting oil" means that the knitting oil is miscible with water in any proportion, and a transparent solution rather than a white opaque emulsion is obtained after the knitting oil and water are mixed.

[0030] The present application provides a water-soluble knitting oil, which includes an extreme pressure anti-wear agent, a friction reducing agent, an antioxidant, a rust inhibitor and a random fatty alcohol polyether;

[0031] The mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 90wt% to 99wt%.

[0032] In some embodiments, the structural formula of the random fatty alcohol polyether is as follows:

[0033]

[0034] Wherein, R is a C4-C18 alkyl group, m is an integer selected from 8-16, and n is an integer selected from 4-12.

[0035] The water-soluble knitting oil provided by the present application uses random fatty alcohol ether as lubricating base oil, so that the knitting oil can be mutually soluble with water in any proportion, and can be configured into a transparent solution in actual use, and the stability of the solution is good, and the phenomenon of stratification and demulsification will not occur at high temperature (such as about 90 ° C) or long storage at room temperature, and can be used for a long time. At the same time, the viscosity index of the above-mentioned random fatty alcohol polyether is greater than the mineral white oil in the common knitting oil, and it can ensure that the oil maintains a relatively stable viscosity under the operating environment of the syringe high temperature, improves lubricity, and the oil film thickness of the oil on the metal surface is relatively stable, and the wear resistance is excellent. In addition, the above-mentioned random fatty alcohol polyether has abundant EO and PO groups, and has strong binding properties with components such as extreme pressure anti-wear agents, which can significantly improve the stability of the overall knitting oil formula, avoid turbidity and precipitation due to poor system compatibility, and the above-mentioned random fatty alcohol polyether has better binding properties with the metal surface than mineral white oil, which helps to form a stable oil film on the metal surface, and comprehensively improves the wear resistance of the water-soluble knitting oil.

[0036] It should be understood that the random fatty alcohol polyethers mentioned in the present application can be prepared by technical means known to those skilled in the art, or can be purchased commercially. The present application does not limit the method for preparing the random fatty alcohol polyethers mentioned above, which can be but not limited to using active compounds such as glycerol, ethylene glycol, etc. as initiators, then putting the initiators and ethylene oxide and propylene oxide into a polymerization reactor, and performing polymerization reaction under the action of an alkali catalyst or an amine catalyst, and synthesizing the random fatty alcohol polyethers mentioned above by adjusting the specific feeding method of ethylene oxide and propylene oxide, such as mixed addition or segmented addition.

[0037] In some embodiments, the water-soluble knitting oil comprises, by weight, 0.5 to 4 parts of extreme pressure anti-wear agent, 0.2 to 4 parts of anti-friction agent, 0.1 to 1 parts of antioxidant, 0.05 to 1 parts of rust inhibitor and 90 to 99 parts of random fatty alcohol polyether. The inventors have found through experiments that when the content of fatty alcohol polyether in the knitting oil is too low, the stability of the prepared oil is poor, and the anti-wear performance and lubrication performance are slightly improved, and the problems of oil needles and oil spots cannot be effectively solved. In order to significantly improve the performance of the oil, a large amount of anti-wear agent and anti-friction agent need to be added, which will greatly increase the production cost of the oil and is not conducive to promotion and application.

[0038] In some embodiments, the mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 95wt% to 99wt%.

[0039] In some embodiments, the water-soluble knitting oil comprises, by weight, 0.5 to 2 parts of extreme pressure anti-wear agent, 0.2 to 2 parts of friction reducer, 0.1 to 0.5 parts of antioxidant, 0.05 to 0.5 parts of rust inhibitor and 95 to 99 parts of random fatty alcohol polyether.

[0040] In some embodiments, the extreme pressure anti-wear agent is a phosphorus-based extreme pressure anti-wear agent, which can cooperate with random fatty alcohol polyether to improve the anti-wear and friction-reducing performance of knitting oil, and has good solubility in the polyether system and is not easy to precipitate. It is understandable that any phosphorus-based extreme pressure anti-wear agent reported in the prior art can be used in this application, such as but not limited to one or more of phosphate ammonium salt extreme pressure anti-wear agents, alkyl phosphite extreme pressure anti-wear agents, phosphate extreme pressure anti-wear agents, and thiophosphate ammonium salt extreme pressure anti-wear agents.

[0041] In some embodiments, the phosphorus-based extreme pressure and anti-wear agent includes, but is not limited to, one or more of BASF 349, phosphites, organic phosphates, and dithiophosphates.

[0042] In some embodiments, the above-mentioned friction reducer is one or more of a phosphate friction reducer and a phosphite friction reducer.

[0043] In some embodiments, the friction reducing agent includes, but is not limited to, one or more of phosphate esters, tricresyl phosphate, and alkylthiophosphates.

[0044] In some embodiments, the antioxidant is a phenolic antioxidant, which is not easy to change color and can prevent the knitting oil from causing butter needles in subsequent use.

[0045] In some embodiments, the phenolic antioxidants include but are not limited to one or more of BasfL135 and di-tert-butyl-p-cresol.

[0046] In some embodiments, the rust inhibitor is one or more of benzotriazole derivatives, olefin succinic acid monoesters, phosphate rust inhibitors and amide rust inhibitors.

[0047] On the other hand, the present application also provides a method for preparing the above-mentioned water-soluble knitting oil, comprising the following steps:

[0048] The random fatty alcohol polyether is mixed with an extreme pressure anti-wear agent, a friction reducing agent, an antioxidant and a rust preventive according to a proportion to prepare a water-soluble knitting oil.

[0049] It is to be understood that the present application does not limit the above-mentioned mixing method and time, as long as the components can be mixed. In some embodiments, the above-mentioned mixing method can be but is not limited to stirring. The present invention does not limit the speed and time of stirring and mixing, and the appropriate stirring speed and time can be selected according to the actual situation (such as stirring equipment), all within the scope of protection of the present application.

[0050] The present application also provides the use of the above-mentioned water-soluble knitting oil as a lubricating auxiliary agent for large circular knitting machine textile equipment.

[0051] It should be understood that materials of the same or similar type, model, quality, nature or function as the reagents and instruments used in the following examples can be used to implement the present application. The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

[0052] The following are examples and comparative examples:

[0053] Example 1

[0054] The water-soluble knitting oil provided in this embodiment includes, by weight, random fatty alcohol polyether (98.5 parts of fatty alcohol polyether, purchased from Jiangsu Zhongshan Company, with the brand name 50HB100), extreme pressure anti-wear agent (0.8 parts of phosphite extreme pressure anti-wear agent, with the brand name DOHP), wear reducer (0.4 parts of phosphate wear reducer, with the brand name T451), antioxidant (0.2 parts of phenolic antioxidant, with the brand name L135), and rust inhibitor (0.1 parts of benzotriazole derivative, with the brand name Staradd MF439).

[0055] The preparation method of the water-soluble knitting oil of this embodiment is as follows: the fatty alcohol polyether, extreme pressure anti-wear agent, friction reducing agent, antioxidant and rust inhibitor are put into a reaction kettle at once, stirred at 600 rpm for 30 minutes, and then filtered to obtain a finished knitting oil with a colorless and transparent appearance.

[0056] Example 2

[0057] The water-soluble knitting oil provided in this embodiment includes, by weight, random fatty alcohol polyether (including 30 parts of fatty alcohol polyether, brand polyether YT-93G and 68.5 parts of fatty alcohol polyether, brand 50HB100), extreme pressure anti-wear agent (1 part of phosphite extreme pressure anti-wear agent, brand DOHP), wear reducer (0.2 parts of phosphate wear reducer, brand T451), antioxidant (0.2 parts of phenolic antioxidant, brand L135), and rust inhibitor (0.1 parts of benzotriazole derivative, brand Staradd MF439).

[0058] The preparation method of the water-soluble knitting oil provided in this embodiment is the same as that in Example 1, and a finished knitting oil having a colorless and transparent appearance is prepared.

[0059] Example 3

[0060] The water-soluble knitting oil provided in this embodiment includes, by weight, random fatty alcohol polyether (including 30 parts of fatty alcohol polyether, with the brand name polyether YT-93G and 68.5 parts of fatty alcohol polyether, with the brand name 50HB100), extreme pressure anti-wear agent (0.8 parts of phosphate extreme pressure anti-wear agent, with the brand name irgalube 353), wear reducer (0.4 parts of phosphate wear reducer, with the brand name T451), antioxidant (0.2 parts of phenolic antioxidant, with the brand name L135), and rust inhibitor (0.1 parts of benzotriazole derivative, with the brand name Staradd MF439).

[0061] The preparation method of the water-soluble knitting oil provided in this embodiment is the same as that in Example 1, and a finished knitting oil having a colorless and transparent appearance is prepared.

[0062] Example 4

[0063] The water-soluble knitting oil provided in this embodiment includes, by weight, random fatty alcohol polyether (including 40 parts of fatty alcohol polyether, with the brand name polyether YT-93G and 58.3 parts of fatty alcohol polyether, with the brand name 50HB100), extreme pressure anti-wear agent (1.2 parts of phosphate extreme pressure anti-wear agent, with the brand name irgalube 353), wear reducer (0.25 parts of phosphate wear reducer, with the brand name T451), antioxidant (0.2 parts of phenolic antioxidant, with the brand name L135), and rust inhibitor (0.05 parts of benzotriazole derivative, with the brand name Staradd MF439).

[0064] The preparation method of the water-soluble knitting oil provided in this embodiment is the same as that in Example 1, and a finished knitting oil having a colorless and transparent appearance is obtained.

[0065] Example 5

[0066] The water-soluble knitting oil provided in this embodiment includes, by weight, 90 parts of random fatty alcohol polyether (90 parts of fatty alcohol polyether, brand 50HB100), extreme pressure anti-wear agent (4 parts of phosphate extreme pressure anti-wear agent, brand DOHP), wear reducer (4 parts of phosphate wear reducer, brand T451), antioxidant (1 part of phenolic antioxidant, brand L135), and rust inhibitor (1 part of benzotriazole derivative, brand Staradd MF439).

[0067] The preparation method of the water-soluble knitting oil provided in this embodiment is the same as that in Example 1, and a finished knitting oil having a colorless and transparent appearance is obtained.

[0068] Comparative Example 1

[0069] The knitting oil produced by Yiwu Yingyun Technology Co., Ltd. is under the brand name Wei Xin.

[0070] Comparative Example 2

[0071] The water-soluble knitting oil provided in this comparative example includes, by weight, random fatty alcohol polyether (98.5 parts of fatty alcohol polyether, brand MARLOX FS20), extreme pressure anti-wear agent (0.8 parts of phosphate extreme pressure anti-wear agent, brand DOHP), wear reducer (0.4 parts of phosphate wear reducer, brand T451), antioxidant (0.2 parts of phenolic antioxidant, brand L135), and rust inhibitor (0.1 parts of benzotriazole derivative, brand Staradd MF439).

[0072] The preparation method of the water-soluble knitting oil provided in this comparative example is the same as that in Example 1, and a finished knitting oil having a colorless and transparent appearance is prepared.

[0073] The finished knitting oils provided in the embodiments and comparative examples were stirred and mixed with water to prepare an oil aqueous solution with a mass fraction of 50%. It was found in the experiment that the oil aqueous solutions prepared by the water-soluble knitting oils of Examples 1 to 6 and Comparative Example 2 all had a transparent appearance, indicating that these knitting oils were miscible with water, and the prepared oil aqueous solutions had good stability. They would not be delaminated or demulsified in a high temperature environment (such as about 90° C.) or stored at room temperature for a long time, and could be used for a long time. However, the knitting oil of Comparative Example 1 was stirred and mixed with water to form a milky white emulsion, indicating that the knitting oil was not miscible with water. Placing the emulsion in a high temperature environment or storing it for a long time may cause the emulsion to be delaminated and demulsified, and unstable stratification may occur. The stability of the emulsion was poor, which was not conducive to its promotion and use.

[0074] The finished knitting oils of the embodiments and comparative examples were tested for performance as follows:

[0075] 1) Friction coefficient and wear spot diameter: refer to NB / SH / T 0189-2017, where the friction conditions are load of 300N, rotation speed of 1200rpm, and long grinding of 60min at room temperature.

[0076] 2) Liquid phase corrosion: Determine according to GB / T 11143.

[0077] 3) Pour point: measured in accordance with GB / T 3535.

[0078] 4) Oil removal rate:

[0079] S1. Take a certain amount of grey cloth and clean it to remove the residual oil on the cloth. Then dry it in a 90℃ oven for half an hour, weigh it and record the weight of the grey cloth.

[0080] S2. Add about 10% of the weight of the knitting oil to the upper half of the dried grey cloth, and record the mass of the knitting oil. Use nuclear magnetic oil content to measure the total oil content of the whole cloth, which is recorded as a1.

[0081] S3. According to the bath ratio of grey cloth and water of 1:50 (M cloth: M water), the cloth is stirred and washed for 20 minutes, and then placed in a 90°C oven for drying for half an hour. The total oil content of the whole cloth after washing is measured, which is recorded as a2; the oil content of the upper part (oil-containing area) and the lower part (oil-free area) of the cloth after washing are tested respectively, which are recorded as a3 and a4, respectively, to observe the dispersion of the knitting oil during the washing process.

[0082] S4. Calculation of oil removal rate: Oil removal rate = ((a1-a2) / a1) × 100%.

[0083] 6) The test method for the dyeing effect of the grey cloth after degreasing is as follows:

[0084] S1. Oiling the grey cloth: Add knitting oil dropwise to the upper part of the grey cloth (add 0.5 g of knitting oil to every 5 g of grey cloth), and the lower part of the grey cloth is an oil-free area.

[0085] S2. Drying or heat setting at 190℃: The oiled grey cloth is processed by a heat setting machine for 1 minute. After heat setting, the size of the cloth will be reduced and the weight will be reduced by about 0.5g.

[0086] S3. Pre-treatment and degreasing: The dried fabric is washed and degreased with a degreasing agent (TF-109HA) at a bath ratio of 5:100 (M fabric: M degreasing agent).

[0087] S4. Dyeing: Add the degreased fabric, dye solution and working solution into the reactor at a bath ratio of 1:1:9 (M fabric: M dye solution: M working solution), set the temperature to 98°C, and dye for 1 hour.

[0088] S5. Take out the cloth, wash it with clean water and dry it. Observe the uniformity of dyeing after degreasing the cloth. The results are as follows: Figure 1 shown.

[0089] 7) Biodegradation rate: Determined in accordance with GB / T 19277.

[0090] Table 1 Performance test results of finished knitting oils of Examples 1 to 5 and Comparative Examples 1 to 2

[0091]

[0092] The test results show that the water-soluble knitting oil provided in Examples 1 to 5 has excellent lubricity, and can ensure that the knitting oil maintains long-lasting good wear resistance at low oil levels. In actual use, the amount of oil added can be reduced, thereby effectively avoiding the occurrence of oil needle phenomenon at the source. At the same time, the degreasing rate is as high as 96%, indicating that the above-mentioned water-soluble knitting oil has excellent emulsification, and the compatibility of each component is good, which can significantly improve the washing effect of the water-soluble knitting oil on the cloth surface. In actual use, even if the water-soluble knitting oil is stained on the cloth surface, it can be well emulsified and washed away. Furthermore, the dyeing effect after degreasing the grey cloth shows that the cloth stained with the above-mentioned water-soluble knitting oil will not demulsify in the subsequent dyeing and finishing process, which can ensure that the cloth is completely degreased, and there is no difference in the subsequent dyeing, which effectively improves the yield of cloth dyeing. In addition, the knitting oil provided in the present application is highly degradable and environmentally safe.

[0093] Depend on Figure 1 It can be seen that after degreasing and dyeing, the grey cloth stained with the knitting oil prepared in Example has no difference in dyeing, indicating that the cloth is evenly dyed after degreasing, while the grey cloth stained with the knitting oil of Comparative Example 1 and Comparative Example 2 has white spots after degreasing and dyeing, indicating that the cloth is incompletely degreased and unevenly dyed.

[0094] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A water-soluble knitting oil, characterized in that: It includes extreme pressure anti-wear agents, friction reducers, antioxidants, rust inhibitors and random fatty alcohol polyethers; The mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 90wt% to 99wt%.

2. The water-soluble knitting oil according to claim 1, characterized in that: The structural formula of the random fatty alcohol polyether is as follows: Wherein, R is a C4-C18 alkyl group, m is an integer selected from 8-16, and n is an integer selected from 4-12.

3. The water-soluble knitting oil according to claim 2, characterized in that: The mass percentage of the random fatty alcohol polyether in the water-soluble knitting oil is 95wt% to 99wt%.

4. The water-soluble knitting oil according to claim 1, characterized in that: The extreme pressure anti-wear agent is a phosphorus-based extreme pressure anti-wear agent; Preferably, the phosphorus-based extreme pressure anti-wear agent is selected from one or more of phosphate ammonium salts, alkyl phosphites, phosphates and thiophosphate ammonium salts.

5. The water-soluble knitting oil according to claim 1, characterized in that: The friction reducing agent is one or more of phosphates and phosphites.

6. The water-soluble knitting oil according to claim 1, characterized in that: The antioxidant is a phenolic antioxidant.

7. The water-soluble knitting oil according to claim 1, characterized in that: The rust inhibitor is one or more of benzotriazole derivatives, olefin succinic acid monoesters, phosphates and amides.

8. The water-soluble knitting oil according to claim 1, characterized in that: The invention comprises, by weight, 0.5 to 4 parts of extreme pressure anti-wear agent, 0.2 to 4 parts of wear reducing agent, 0.1 to 1 parts of antioxidant, 0.05 to 1 parts of rust inhibitor and 90 to 99 parts of random fatty alcohol polyether.

9. The method for preparing a water-soluble knitting oil according to any one of claims 1 to 8, characterized in that: The steps include: The random fatty alcohol polyether is mixed with an extreme pressure anti-wear agent, a friction reducing agent, an antioxidant and a rust preventive according to a proportion to prepare a water-soluble knitting oil.

10. The use of the water-soluble knitting oil according to any one of claims 1 to 8, characterized in that: Used as a lubricating agent for circular knitting equipment.

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