Additive, water-based copper rolling emulsion containing additive and application

Abstract

The invention provides an additive, a water-based copper rolling emulsion containing the additive and application of the water-based copper rolling emulsion. The water-oil balance agent is prepared from 2, 2 '-[[(methyl-1H-benzotriazole-1-yl) methyl] imino] diethanol, an R group is an EO or EO-PO-EO block polymer, water-oil balance is achieved by adjusting the HLB value, and meanwhile the molecular weight and the number of the R group have important influences on wetting, cleaning and stability of rolling emulsion. The additive is added into the rolling emulsion, so that the rolling emulsion shows the properties of wetting, dispersing, emulsifying, metal deactivating, oxidation resisting, lubricating and the like, has high detergency and long service life, and can keep the emulsion stable for a long time.

Description

Technical Field

[0001] The patent of the present invention relates to the field of metal rolling technology, and further relates to an additive, a water-based copper rolling emulsion containing the additive, and applications. Background Art

[0002] Copper ranks third in industrial usage. Copper and copper alloy sheets and strips are widely used in various fields, accounting for approximately 35% of the total copper processing materials. With the development of China's economy and electronic information industry, demand for copper alloy sheets and strips has increased year by year, and the requirements for their performance and precision have also become increasingly higher. Copper alloy sheets and strips are mainly produced through large-scale rolling mills. Rolling emulsions mainly play a role in lubrication, cooling, and rust prevention during the copper rolling process. Although traditional rolling emulsions can meet the production requirements of most customers, there are still some key technical issues that need to be resolved, mainly as follows:

[0003] (1) Large fluctuations in emulsion indicators: Traditional rolling emulsions use soap technology. Acidic substances have strong chemical activity and are easily adsorbed on the metal surface or react with metals such as copper powder to form metal soaps. In addition, the compounded Span emulsifiers have poor hydrolysis stability, resulting in fluctuations in indicators such as concentration and pH, changes in emulsion performance, and thus affecting rolling quality.

[0004] (2) Weak resistance to pollution shock: Emulsion contamination in copper processing usually includes mechanical oil leakage, acid gas pollution and water pollution, which leads to oil and soap precipitation. In order to maintain rolling stability, large-scale discharge or increased renewal frequency is usually adopted to achieve emulsion circulation, which also increases waste liquid treatment costs and environmental risks.

[0005] (3) Weak emulsion detergency: Traditional copper rolling emulsions usually use sulfonated vegetable oil as the oiliness agent, which has weak resistance to hard water and copper ions. In the early stage of liquid preparation, a long sludge window is prone to appear. There are many leakages on site, and new oil needs to be added frequently, so sludge often occurs repeatedly, which increases management and maintenance costs and affects rolling efficiency and product quality.

[0006] (4) The emulsion cycle life is short.

[0007] Based on the above-mentioned application problems, it is urgent to develop a new type of rolling emulsion with high cleanliness, good stability and long service life on the basis of traditional copper rolling emulsion to meet the increasingly stringent requirements of modern copper alloy plates in terms of processing accuracy and performance quality. Summary of the Invention

[0008] To address the problems of existing copper rolling emulsions, such as poor system stability, easy oil and soap separation, weak detergency, and short lifespan, the present invention aims to provide an additive, a water-based copper rolling emulsion containing this additive, and its application. The emulsion contains an additive modified with 2,2'-[[(methyl-1H-benzotriazol-1-yl)methyl]imino]diethanol. This additive achieves water-oil balance by adjusting the HLB value, exerting dispersing, emulsifying, and wetting properties while also suppressing foaming. The emulsion containing this novel additive outperforms conventional copper rolling emulsions and similar commercial products in terms of dispersibility, detergency, antioxidant properties, and lubricity, and has a longer service life.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] An additive having a structure represented by the following formula (I) or (II):

[0011] Formula (I),

[0012] Formula (II),

[0013] Where R is or , n is 1-20, m is 1-10.

[0014] The present invention also provides a water-based copper rolling emulsion comprising the above-mentioned additive.

[0015] In some technical solutions, the weight percentage of the additive in the rolling emulsion is 0.5% to 3%.

[0016] In some technical solutions, the water-based copper rolling emulsion further includes: base oil, oiliness agent, antioxidant, surfactant, pH buffer and coupling agent.

[0017] In some technical solutions, in the water-based copper rolling emulsion, the weight percentage of the base oil is 60% to 80%; and / or the weight percentage of the oiliness agent is 12% to 20%; and / or the weight percentage of the antioxidant is 0.2% to 0.5%; and / or the weight percentage of the surfactant is 5% to 10%; and / or the weight percentage of the pH buffer is 0.5% to 1.5%; and / or the weight percentage of the coupling agent is 0.5% to 1%.

[0018] In some technical solutions, the base oil is paraffin-based mineral oil or cycloalkyl mineral oil; and / or the oiliness agent is one or more polyol ester oiliness agents; and / or the antioxidant is one or more phenolic antioxidants.

[0019] The present invention also provides a method for preparing the above-mentioned water-based copper rolling emulsion, which comprises the following steps: adding the base oil, the oiliness agent, the antioxidant, the surfactant, the additive, the pH buffer and the coupling agent to a stirring container in sequence according to the proportion of each component, and stirring evenly until all the components are mixed, thereby obtaining the rolling emulsion.

[0020] The present invention also provides application of the water-based copper rolling emulsion in copper rolling.

[0021] Compared with the prior art, the present invention can bring the following beneficial effects:

[0022] 1. The additive provided by the present invention is modified from 2,2'-[[(methyl-1H-benzotriazole-1-yl)methyl]imino]diethanol. The R group (EO or EO-PO-EO block polymer) of the additive achieves water-oil balance by adjusting the HLB value, exerting dispersing, emulsifying and wetting effects. Its molecular weight and quantity are crucial to the wettability, cleanliness and stability of the emulsion. At the same time, the PO segment inhibits foaming.

[0023] 2. The water-based copper rolling emulsion provided by the present invention specifically incorporates the aforementioned novel additive. This additive exhibits wetting, dispersing, emulsifying, metal deactivating, anti-oxidation, and lubricating properties within the emulsion. The emulsion incorporating this additive not only exhibits significant foam suppression and resistance to copper ion leaching, but also maintains long-term emulsion stability, resulting in high cleanliness and a long service life. Testing has shown that this additive outperforms conventional copper rolling emulsions and similar commercial products in terms of dispersibility, cleanliness, copper corrosion resistance, copper ion precipitation resistance, foaming performance, and lubrication.

[0024] 3. The preparation process of the water-based copper rolling emulsion is simple and easy, does not require complex equipment, is convenient for large-scale industrial production, and has significant economic benefits and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 These are the test results of the dispersion and cleaning performance of the copper rolling emulsified oils 1-3 in Example 4 of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments. However, these embodiments are merely exemplary and do not limit the scope of the present invention. It should be understood by those skilled in the art that various improvements and modifications may be made without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

[0028] Example 1

[0029] The present invention provides an additive having a structure represented by the following formula (I) or formula (II):

[0030]

[0031] Formula (I)

[0032]

[0033] Formula (II)

[0034] Where R is or , n is 1-20, m is 1-10.

[0035] The additive can be regarded as a modified product of 2,2'-[[(methyl-1H-benzotriazole-1-yl)methyl]imino]bisethanol compound. 2,2'-[[(methyl-1H-benzotriazole-1-yl)methyl]imino]bisethanol is a water-soluble copper corrosion inhibitor and can also be used as an antioxidant, metal deactivator, oiliness agent, friction modifier and film-forming aid.

[0036] This additive can be regarded as a modification of the 2,2'-[[(methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol compound. 2,2'-[[(methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol is a water-soluble copper corrosion inhibitor that also has multiple functions such as antioxidant, metal deactivation, oiliness enhancement, friction improvement and film-forming aid.

[0037] When added to the copper rolling emulsion, the R group in this additive plays a role in dispersing, emulsifying, and wetting the copper rolling emulsion. This group possesses strong hydrophilicity, and its molecular structure, an EO or EO-PO-EO block polymer, effectively adjusts the hydrophilic-lipophilic balance (HLB) of the emulsion, thereby achieving a stable water-oil balance. The molecular weight and number of R groups significantly influence the wettability, cleanliness, and stability of the emulsion. Furthermore, the PO segment has a certain inhibitory effect on the emulsion's foaming properties.

[0038] Example 2

[0039] On the basis of Example 1, the present invention further provides a water-based copper rolling emulsion, to which the additive provided in Example 1 is added.

[0040] Furthermore, the weight percentage of the additive in the water-based copper rolling emulsion is 0.5% to 3%.

[0041] In some embodiments, the water-based copper rolling emulsion further comprises: a base oil, an oiliness agent, an antioxidant, a surfactant, a pH buffer and a coupling agent. The oiliness agent helps to enhance the lubrication properties of the emulsion, and the antioxidant is used to extend the service life of the emulsion and prevent it from degradation due to oxidation. The surfactant can reduce the surface tension of the oil-water interface during the emulsification process and promote the formation of a stable emulsion state between the oil and water. The pH buffer is used to adjust the pH of the emulsion to ensure that it maintains a stable pH value during the rolling process and prevent corrosion to copper materials and equipment. The coupling agent helps to improve the compatibility between the components in the emulsion and enhance the stability of the emulsion.

[0042] Furthermore, in the water-based copper rolling emulsion, the base oil accounts for 60% to 80% by weight, the oiliness agent accounts for 12% to 20% by weight, the antioxidant accounts for 0.2% to 0.5% by weight, the surfactant accounts for 5% to 10% by weight, the pH buffer accounts for 0.5% to 1.5% by weight, and the coupling agent accounts for 0.5% to 1% by weight.

[0043] Furthermore, the base oil is paraffinic mineral oil or naphthenic mineral oil, and the paraffinic mineral oil can be selected from ISO VG 32, ISO VG 46, ISO VG 68, ISO VG 100, ISO VG 150, ISO VG 220, etc.

[0044] The above-mentioned oiliness agent is one or more polyol ester oiliness agents, such as pentaerythritol ester, trimethylolpropane ester, neopentyl glycol ester and the like.

[0045] The antioxidant is one or more phenolic antioxidants, such as 2,6-di-tert-butyl-p-cresol (BHT), AO-4426, Irganox 1010, and the like.

[0046] The above-mentioned surfactant can be selected from one or more surfactants, such as Span series (Span-80, etc.), Tween series (Tween-80, sodium petroleum sulfonate (T702), etc.), etc.

[0047] The pH buffer mentioned above can be selected from one or more pH buffers, such as borax, triethanolamine (TEA), triethanolamine (TEA), etc.

[0048] The coupling agent can be selected from one or more of ethylene glycol butyl ether, diethylene glycol monobutyl ether, triethyl citrate, and dibutyl phthalate.

[0049] In some embodiments, the preparation process of the water-based copper rolling emulsion is as follows: according to a pre-calculated ratio, the above-mentioned base oil, oiliness agent, antioxidant, surfactant, additive of Example 1, pH buffer and coupling agent are sequentially added to a stirring container, and uniformly stirred until all components, especially solid components, are completely dissolved and fully mixed and dispersed, thereby obtaining a stable rolling emulsion.

[0050] It should be noted that the stirring speed and time need to be controlled during the stirring process to avoid introducing too much air due to excessive stirring, which will cause excessive foaming of the rolled emulsion.

[0051] Example 3

[0052] Based on the above embodiment, this embodiment provides an application of the water-based copper rolling emulsion, which is primarily used in the copper rolling process. Before rolling, the prepared water-based copper rolling emulsion is evenly applied to the surface of the copper material and the rollers. The application method can be spraying, brushing, or roller coating. During the rolling process, the rolling emulsion is continuously consumed and needs to be replenished in a timely manner to ensure the smooth progress of the rolling process. After rolling is completed, the copper material and rollers need to be cleaned using clean water or a dedicated cleaning agent to remove the rolling emulsion and impurities on the surface.

[0053] It should be noted that, in actual application, the specific steps can be adjusted according to actual conditions.

[0054] Based on Examples 1-3, the following Examples 4-8 respectively test the performance of a traditional copper rolling emulsion, a commercially available copper rolling emulsion, and a new rolling emulsion (ie, the water-based copper rolling emulsion provided in Example 2).

[0055] Table 1 Components and proportions of water-based copper rolling emulsion

[0056]

[0057] The water-based copper rolling emulsion prepared in Table 1 has a structure shown in formula (I) or formula (II), wherein the R group is an EO chain, that is, , n is 8.

[0058] Table 2 Components and proportions of traditional copper rolling emulsion

[0059]

[0060] According to the preparation steps of Example 2 and the formulas of Tables 1 and 2, a water-based copper rolling emulsion and a conventional copper rolling emulsion were prepared, respectively. The main difference between the water-based copper rolling emulsion and the conventional copper rolling emulsion lies in the additives and copper corrosion inhibitors used. In the two emulsions, the addition ratio of the additives and corrosion inhibitors is the same, and is a specific value selected from the range of 0.5% to 3%, such as 0.5%, 3%, or 1.75%. Similarly, all other components and their proportions of the two emulsions remain consistent.

[0061] Example 4

[0062] This example mainly evaluates the dispersion and cleaning performance. Ultrasonic instruments are used to evaluate and compare the water-based copper rolling emulsion provided by the present invention with traditional copper rolling emulsions and commercially available copper rolling emulsions. The results are shown in Tables 3 and Figure 1 shown.

[0063] Table 3 Dispersion and cleaning performance test results

[0064]

[0065] Note

[0066] Note: Copper rolling emulsion oils 1 and 2 in Table 3 are water-based copper rolling emulsions and traditional copper rolling emulsions prepared from Tables 1 and 2 above, respectively. Copper rolling emulsion oil 3 is a commonly used copper rolling emulsion available on the market.

[0067] The "2%" marking on the copper rolling emulsion oil 1, copper rolling emulsion oil 2 and copper rolling emulsion oil 3 mentioned above means that the corresponding copper rolling oil is mixed with deionized water in a specific proportion, and after shear emulsification treatment, the mass proportion of the oil phase in the obtained stable emulsion is 2%, that is, the mass ratio of oil to water is 2:98.

[0068] Evaluation method: Dispersion cleanliness is divided into 5 levels from high to low, namely "5, 4, 3, 2, 1". The higher the level, the better the cleanliness.

[0069] As can be seen from Table 3, the dispersion and cleanliness of the water-based copper rolling emulsion provided by the present invention is far superior to that of traditional copper rolling emulsions and similar copper rolling emulsions on the market, indicating that the water-based copper rolling emulsion has excellent cleanliness performance for the rolling mill system, can effectively reduce sludge generation and sludge window period, and improve the cleanliness of the rolling mill and plate surface, thereby reducing management and maintenance costs and improving rolling efficiency and product quality.

[0070] Example 5

[0071] This example primarily evaluates copper corrosion resistance. Using a standard copper sheet and a constant temperature chamber, the high-clean, long-life water-based copper rolling emulsion provided by the present invention was evaluated and compared with a conventional water-based copper rolling emulsion and a commercially available copper rolling emulsion. The test method followed GB / T 5096-1985, Petroleum Products Copper Strip Corrosion Test Method. The test results are shown in Table 4 below.

[0072] Table 4 Test results of copper corrosion resistance

[0073]

[0074] Note: Copper rolling emulsion oils 1 and 2 in Table 4 are water-based copper rolling emulsions and traditional copper rolling emulsions prepared from Tables 1 and 2 above, respectively. Copper rolling emulsion oil 3 is a commonly used copper rolling emulsion available on the market.

[0075] The "3%" notation for Copper Rolling Emulsion Oil 1, Copper Rolling Emulsion Oil 2, and Copper Rolling Emulsion Oil 3 mentioned above means that the corresponding copper rolling oil is mixed with deionized water in a specific ratio, and after shear emulsification, the resulting stable emulsion has an oil phase weight percentage of 3%, that is, an oil-to-water ratio of 3:97. Similarly, the "3%" notation used below has the same meaning as the above "3%", so it will not be repeated here.

[0076] As can be seen from Table 4, the water-based copper rolling emulsion provided by the present invention has better copper sheet corrosion resistance than traditional copper rolling emulsions and similar copper rolling emulsions on the market, indicating that the new water-based copper rolling emulsion has good copper sheet corrosion resistance and can effectively prevent oil corrosion on metals during storage, transportation and use.

[0077] Example 6

[0078] This example primarily evaluated the copper ion precipitation resistance of the present invention. Using copper powder and a magnetic stirrer, the high-clean, long-life water-based copper rolling emulsion was evaluated and compared with conventional water-based copper rolling emulsions and commercially available copper rolling emulsions. The test results are shown in Table 5 below.

[0079] Table 5 Test results of copper ion precipitation resistance

[0080]

[0081] Note: Copper rolling emulsion oils 1 and 2 in Table 5 are water-based copper rolling emulsions and traditional copper rolling emulsions prepared from Tables 1 and 2 above, respectively. Copper rolling emulsion oil 3 is a commonly used copper rolling emulsion available on the market.

[0082] As can be seen from Table 5, the novel water-based copper rolling emulsion provided by the present invention has much better resistance to copper ion precipitation than traditional copper rolling emulsions and similar copper rolling emulsions on the market, indicating that the novel water-based copper rolling emulsion has excellent resistance to copper ion precipitation, can effectively prevent the corrosion of the emulsion on the copper plate and strip and the leaching of copper ions, thereby maintaining the stability of the rolling emulsion performance and rolling quality.

[0083] Example 7

[0084] This example aims to evaluate the copper ion precipitation resistance of water-based copper rolling emulsions containing different R groups. The performance differences between the formulations in Table 1 and two comparative examples (Comparative Example 1 and Comparative Example 2) are compared. The water-based copper rolling emulsion provided in Comparative Example 1 is similar to the water-based copper rolling emulsion provided in Table 1 in that its molecular formula is the structure of Formula (I) or Formula (II), and the molecular formula of the water-based copper rolling emulsion in Comparative Example 1 is an EO chain, i.e. ; The difference is: n is 6.

[0085] The water-based copper rolling emulsion provided in Comparative Example 2 is similar to the water-based copper rolling emulsion provided in Table 1 in that its molecular formula is the structure of formula (I) or formula (II); the difference is that the molecular formula of the water-based copper rolling emulsion in Comparative Example 2 is an EO-Po-EO chain, that is, , where the total number of n is 8 and m is 4.

[0086] The additive ratios in the water-based copper rolling emulsions provided in Comparative Examples 1 and 2 are the same as those in Table 1, and are all selected from a specific value within the range of 0.5% to 3%, such as 0.5%, 3%, or 1.75%. Similarly, all other components and their ratios in the two emulsions remain consistent.

[0087] Copper powder and a magnetic stirrer were used to test and prepare the water-based copper rolling emulsions of the formulations in Table 1, Comparative Examples 1 and 2, respectively, and compared. Detailed test results are shown in Table 6.

[0088] Table 6 Test results of copper ion precipitation resistance

[0089]

[0090] The test results in Table 6 show that compared with Comparative Example 1, copper-rolled emulsion oil 1 has more EO chains, which improves emulsion stability and resistance to copper ion precipitation. Compared with Comparative Example 2, copper-rolled emulsion oil 1 has the same number of EO chains, but its resistance to copper ion precipitation is weakened due to the presence of PO chains.

[0091] From this, it can be concluded that when there are more EO chains, the emulsification of water-based copper rolling emulsion is good and the emulsion stability is good; under the same EO chain conditions, the increase in the number of PO chains will affect the emulsion stability to a certain extent, resulting in a decrease in its resistance to copper ions.

[0092] In addition, compared with the test results in Table 5 of Example 4, whether it is copper rolling emulsion oil 1 or comparative example 1 and comparative example 2, their anti-copper ion precipitation performance is better than traditional copper rolling emulsion and commercially available traditional copper rolling emulsion.

[0093] Example 8

[0094] This example primarily evaluates foam performance, using a hand-cranking method to measure foam. The high-clean, long-life water-based copper rolling emulsion provided by the present invention was evaluated and compared with conventional water-based copper rolling emulsions and commercially available copper rolling emulsions. The test results are shown in Table 7 below.

[0095] Table 7 Foam properties test results

[0096]

[0097] Note: Copper rolling emulsion oils 1 and 2 in Table 7 are water-based copper rolling emulsions and traditional copper rolling emulsions prepared from Tables 1 and 2 above, respectively. Copper rolling emulsion oil 3 is a commonly used copper rolling emulsion available on the market.

[0098] As shown in Table 7, the foaming performance of the novel water-based copper rolling emulsion provided by the present invention is far superior to that of conventional copper rolling emulsions and similar copper rolling emulsions on the market, indicating that the novel water-based copper rolling emulsion has a low foaming tendency and good defoaming ability, thereby ensuring that the lubrication, cooling, and rust prevention properties of the emulsion are not affected during the processing, thereby ensuring that the quality and performance of the processed products are not affected.

[0099] Example 9

[0100] This example aims to evaluate the foaming properties of water-based copper rolling emulsions containing different n values.

[0101] A water-based copper rolling emulsion (copper rolling emulsion oil 1) was prepared according to the formula in Table 1, wherein the additive addition ratio was 2%. A water-based copper rolling emulsion of Comparative Example 3 was also prepared according to the formula in Table 1, wherein the additive addition ratio was 3%. Copper rolling emulsion oil 1 and the water-based copper rolling emulsion of Comparative Example 3 both have the structure shown in Formula (I) or Formula (II), wherein the R group in the molecular formula is an EO chain, i.e. , n is 8.

[0102] The foam was measured by hand-cranking method, and the copper rolling emulsified oil 1 and comparative example 3 were compared. The test results are shown in Table 8 below.

[0103] Table 8 Foam properties test results

[0104]

[0105] As shown in Table 8, the higher the additive ratio, the longer the foam height and foam elimination time. Furthermore, based on the test results in Table 7 of Example 7, both copper rolling emulsion oil 1 and the water-based copper rolling emulsion of Comparative Example 3 outperformed conventional copper rolling emulsions and commercially available conventional copper rolling emulsions.

[0106] Example 10

[0107] This example primarily evaluates lubrication performance. Using a reciprocating tribometer (RCP), the high-detergency, long-life water-based copper rolling emulsion provided by the present invention was evaluated and compared with conventional water-based copper rolling emulsions and commercially available copper rolling emulsions. The test results are shown in Table 9 below.

[0108] Table 9 Lubrication performance test results

[0109]

[0110] Note: Copper rolling emulsion oils 1 and 2 in Table 9 are water-based copper rolling emulsions and traditional copper rolling emulsions prepared from Tables 1 and 2 above, respectively. Copper rolling emulsion oil 3 is a commonly used copper rolling emulsion available on the market.

[0111] As can be seen from Table 9, the lubricating performance of the novel water-based copper rolling emulsion provided by the present invention is far superior to that of traditional copper rolling emulsions and similar copper rolling emulsions on the market, indicating that the oil film strength of the novel water-based copper rolling emulsion is high, the oil film formed in the rolling roll gap area is not easy to break, and can be maintained for a long time, which effectively improves the lubrication ability of the emulsion and the surface quality of the product.

[0112] Example 11

[0113] This example aims to evaluate the lubricating properties of water-based copper rolling emulsions containing different n values.

[0114] Copper rolling emulsified oil 1, comparative example 4 and comparative example 5 were prepared according to the formula in Table 1. The molecular formulas of copper rolling emulsified oil 1, comparative example 4 and comparative example 5 were all of formula (I) or formula (II), and the R group in the molecular formula could be an EO-PO-EO chain, i.e. Among them, the total number of n in copper rolling emulsified oil 1 is 8, and m is 4; the total number of n in comparative example 4 is 8, and m is 2; the total number of n in comparative example 5 is 8, and m is 6.

[0115] Using a reciprocating friction tester (RCP), copper rolling emulsified oil 1, comparative example 4, and comparative example 5 were compared. The test results are shown in Table 10 below.

[0116] Table 10 Lubrication performance test results

[0117]

[0118] As mentioned above, while the increased number of PO chains in Comparative Example 5 affects emulsion stability to some extent compared to Copper Rolling Emulsion Oil 1 and Comparative Example 4, the test results in Table 10 show that its average friction coefficient and endurance cycle are both superior to those of Copper Rolling Emulsion Oil 1 and Comparative Example 4. This suggests that the increased number of PO chains actually allows more oil to precipitate from the emulsion, which actually benefits lubrication. This may be because the increased number of oily chains inherently promotes lubrication, resulting in a lower average friction coefficient and longer endurance cycle.

[0119] In addition, combined with the test results in Table 9 of Example 9, the lubricating properties of the water-based copper rolling emulsions of both Comparative Example 4 and Comparative Example 5 are better than those of the traditional copper rolling emulsion and the commercially available traditional copper rolling emulsion.

[0120] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An additive, characterized in that The additive has a structure shown in the following formula (I) or formula (II): Formula (I), Formula (II), Where R is or , n is 1-20, m is 1-10.

2. A water-based copper rolling emulsion, characterized in that: The invention comprises the additive according to claim 1.

3. The water-based copper rolling emulsion according to claim 2, characterized in that In the rolling emulsion, the weight percentage of the additive is 0.5% to 3%.

4. The water-based copper rolling emulsion according to claim 2, characterized in that Also includes: Base oil, oiliness agent, antioxidant, surfactant, pH buffer and coupling agent.

5. The water-based copper rolling emulsion according to claim 4, characterized in that In the rolling emulsion, The base oil accounts for 60% to 80% by weight; and / or, The weight percentage of the oiliness agent is 12% to 20%; and / or, The antioxidant accounts for 0.2% to 0.5% by weight; and / or, The surfactant accounts for 5% to 10% by weight; and / or, The pH buffering agent accounts for 0.5% to 1.5% by weight; and / or, The weight percentage of the coupling agent is 0.5% to 1%.

6. The water-based copper rolling emulsion according to claim 4, characterized in that The base oil is paraffinic mineral oil or naphthenic mineral oil; and / or, The oiliness agent is one or more polyol ester oiliness agents; and / or, The antioxidant is one or more phenolic antioxidants.

7. The method for preparing the water-based copper rolling emulsion according to any one of claims 2 to 6, characterized in that: The steps include: According to the proportion of each component, the base oil, the oiliness agent, the antioxidant, the surfactant, the additive, the pH buffer and the coupling agent are sequentially added into a stirring container and stirred evenly until all the components are mixed uniformly to obtain the rolling emulsion.

8. Use of the water-based copper rolling emulsion according to any one of claims 2 to 6 in copper rolling.

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