Wet leveling liquid composition as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of leveling liquid, and particularly discloses a wet leveling liquid composition and a preparation method and application thereof.The novel wet leveling liquid composition is prepared from organic alkali, a lubricating antirust agent, a corrosion inhibitor, a surfactant and a clearing agent according to a specific proportion; the organic base is composed of at least one of diglycolamine, isopropanolamine, N-methyldiethanolamine and triethanolamine. The wet leveling liquid composition provided by the invention has the characteristics of good cleaning property, lubricity, anti-rust property, no inorganic salt residue and the like, and is applied to high-speed metal processing of a single-stand leveling machine or a multi-stand leveling machine with the reduction rate of more than 3%; and the problems of large foam, white spot residues on a flat surface, yellow spots, poor lubrication and the like in the processing process can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of leveling fluids, and in particular relates to a wet leveling fluid composition and a preparation method and application thereof. Background Art

[0002] The production process of cold-rolled strip includes cold rolling, degreasing, annealing, flattening and rust prevention. Flattening is the last step in the forming process of cold-rolled strip, which determines the surface quality, plate shape, mechanical properties and other indicators of the finished strip.

[0003] The leveling process is divided into two categories: wet leveling and dry leveling. The wet leveling process is widely used due to its excellent lubrication, cooling and rust prevention properties. The process lubricating medium used in the wet leveling process is the wet leveling fluid, which mainly plays the role of lubrication, cooling, cleaning and rust prevention. However, in this field, problems such as large foam, white spots on the leveling surface, yellow spots, and poor lubrication are prone to occur during the use of the wet leveling fluid.

[0004] Therefore, it is particularly important to develop a wet leveling fluid with good cleaning and lubricating properties. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and provide a wet leveling liquid composition and a preparation method and application thereof, specifically adopting the following technical solutions:

[0006] In one aspect, the present application provides a wet leveling fluid composition, which comprises, by weight:

[0007] Water 50-75.5 parts;

[0008] 12-24 parts of organic base;

[0009] 8-16 parts of lubricating and rust-proofing agent;

[0010] 2-5 parts of corrosion inhibitor;

[0011] 2-4 parts of surfactant;

[0012] 0.5-1 part of detergent;

[0013] The organic base is composed of diglycolamine and a second alkali source; the second alkali source includes at least one of isopropanolamine, N-methyldiethanolamine and triethanolamine; and the weight portion of diglycolamine is not less than 4 parts.

[0014] The present application prepares a wet leveling liquid composition with excellent performance by selecting specific proportions of organic bases, lubricating rust inhibitors, corrosion inhibitors, surfactants and detergents; in the wet leveling liquid composition, alkaline substances are often added to achieve excellent alkali reserves and rust and corrosion inhibition properties. In the present application, the inventors, after a lot of research and experiments, determined that the alkaline substance is a combination of multiple specific organic bases, so that the wet leveling liquid composition provided by the present application has a high alkali value reserve capacity and excellent rust and corrosion inhibition properties.

[0015] In some preferred implementations, the corrosion inhibitor includes at least one of benzotriazole and benzotriazole derivative NEUF714.

[0016] In the present application, at least one of benzotriazole and benzotriazole derivative NEUF714 is added as a corrosion inhibitor to slow down the metal corrosion caused by the leveling fluid during the metal processing process.

[0017] In some preferred implementations, the lubricating rust inhibitor consists of a first lubricant and a second lubricant, the first lubricant is an organic acid with a carbon chain length of not less than 10 and less than 20, such as C12 dibasic acid, sebacic acid, C10-C12 mixed dibasic acid; the second lubricant is an organic acid with a carbon chain length of not less than 20, such as dimer acid, C21 dibasic acid.

[0018] In the present application, the inventors have optimized the composition of the lubricating and rust-inhibiting agents, thereby bringing excellent lubrication and rust-inhibiting properties to the wet leveling fluid composition; in the wet leveling fluid composition provided in the present application, the first lubricant is an organic acid with a carbon chain length of not less than 10 and less than 20, such as C12 dibasic acid, sebacic acid; the second lubricant is an organic acid with a carbon chain length of not less than 20, such as dimer acid, C21 dibasic acid, the first lubricant and the second lubricant are matched, and the long and short carbon chain wet leveling liquids are combined to improve uniformity while improving the lubrication performance at various temperature stages.

[0019] In some preferred implementations, the mass ratio of the organic base to the lubricating rust inhibitor is (1.5-3):1.

[0020] In some preferred implementations, the surfactant includes at least one of lauryl alcohol polyoxyethylene ether, isomeric decanol polyoxyethylene ether, and Guerbet alcohol polyoxyethylene ether.

[0021] In some preferred implementations, the detergent includes at least one of succinimide, polyisobutylene succinimide, and a Mannich base.

[0022] On the one hand, the present application also provides a preferred embodiment of the wet leveling liquid, which comprises, by weight:

[0023] 67.5 parts of water;

[0024] 16 parts of organic base;

[0025] Lubricating rust inhibitor 10 parts;

[0026] 3 parts of corrosion inhibitor;

[0027] 3 parts of surfactant;

[0028] 0.5 parts of detergent.

[0029] In some preferred implementations, in the above-mentioned wet leveling liquid composition, the organic base is isopropanolamine and diglycolamine, wherein the weight portion of diglycolamine is 6 parts, the lubricating and rust inhibitor is a mixture of C12 dibasic acid and C21 dibasic acid in a mass ratio of 1:1, the corrosion inhibitor is the benzotriazole derivative NEUF714, the surfactant is Guerbet alcohol polyoxyethylene ether, and the detergent is polyisobutylene succinimide.

[0030] In one aspect, the present application also provides a method for preparing a wet leveling fluid composition, comprising the following steps:

[0031] (1) Mix water, organic base and anti-rust lubricant at 40℃-50℃;

[0032] (2) Add corrosion inhibitor, surfactant and detergent and mix well;

[0033] (3) Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0034] In one aspect, the present application also provides application of the wet leveling fluid composition in the field of metal processing.

[0035] The beneficial effects of the present application are as follows: the wet leveling liquid composition provided in the present application has the characteristics of good cleanliness, lubricity, rust resistance and no inorganic salt residue, etc. When it is applied to a single-frame leveling machine or a multi-frame leveling machine with a reduction rate greater than 3% for high-speed metal processing, it can effectively improve the problems of large foam, white spot residue on the leveled surface, yellow spots, poor lubrication, etc. during the processing process. DETAILED DESCRIPTION

[0036] The following will be combined with the embodiments to clearly and completely describe the concept and technical effects of the present application, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0038] The chemical reagents used in this application are all commercially available. The sources of some chemical reagents are listed below:

[0039] Isopropanolamine: Dow Chemical (China) Co., Ltd.;

[0040] N-Methyldiethanolamine: Dow Chemical (China) Co., Ltd.;

[0041] Triethanolamine: Dow Chemical (China) Co., Ltd.;

[0042] Diglycolamine: Dow Chemical (China) Co., Ltd.;

[0043] Benzotriazole: Biostar Trading (Shanghai) Co., Ltd.

[0044] Benzotriazole derivative NEUF714: Shanghai Nuotai Chemical Co., Ltd.;

[0045] Dimer acid: Dongguan Hersbit New Materials Co., Ltd.;

[0046] C21 dibasic acid: Dongguan Hersbit New Materials Co., Ltd.;

[0047] C12 dibasic acid: Cathay Biotechnology Co., Ltd.;

[0048] Sebacic acid: Nanjing Gutian Chemical Co., Ltd.;

[0049] C10-C12 mixed dibasic acid (CAS: 72162-23-3): Nanjing Gutian Chemical Co., Ltd.;

[0050] Dodecanol polyoxyethylene ether: Yangzi Petrochemical-BASF Co., Ltd.;

[0051] Isomeric decanol polyoxyethylene ether: Yangzi Petrochemical-BASF Co., Ltd.;

[0052] Guerbet alcohol polyoxyethylene ether: Yangzi Petrochemical-BASF Co., Ltd.;

[0053] Succinimide: Hai'an Petrochemical Plant, Jiangsu Province;

[0054] Polyisobutylene succinimide: Hai'an Petrochemical Plant, Jiangsu Province;

[0055] Mannich base: Haian Petrochemical Plant, Jiangsu Province.

[0056] Example 1

[0057] A wet leveling liquid composition, comprising, by weight:

[0058] 67.5 parts of water;

[0059] 16 parts of organic base, including 6 parts of diglycolamine and 10 parts of isopropanolamine;

[0060] 10 parts of lubricating rust inhibitor, including 5 parts of C12 dibasic acid and 5 parts of C21 dibasic acid;

[0061] 3 parts of corrosion inhibitor (benzotriazole derivative NEUF714);

[0062] Surfactant (Guerbet alcohol polyoxyethylene ether) 3 parts;

[0063] Detergent (polyisobutylene succinimide) 0.5 parts.

[0064] Specific preparation steps of the wet leveling liquid composition:

[0065] (1) According to the ratio of each raw material provided in this embodiment, water, isopropanolamine, diglycolamine, C12 dibasic acid and C21 dibasic acid are added to a reaction kettle equipped with a stirrer and a temperature sensor, stirred and heated to 45°C, and continued to stir until completely dissolved;

[0066] (2) adding benzotriazole derivative NEUF714, Guerbet alcohol polyoxyethylene ether and polyisobutylene succinimide and continuing to stir until uniform;

[0067] (3) Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0068] Example 2

[0069] A wet leveling liquid composition, comprising, by weight:

[0070] 50 parts water;

[0071] 24 parts of organic base, including 10 parts of diglycolamine and 14 parts of isopropanolamine;

[0072] 16 parts of lubricating rust inhibitor, including 8 parts of C12 dibasic acid and 8 parts of C21 dibasic acid;

[0073] 5 parts of corrosion inhibitor, which is a benzotriazole derivative NEUF714;

[0074] 4 parts of surfactant, which is Guerbet alcohol polyoxyethylene ether;

[0075] 1 part of detergent, which is polyisobutylene succinimide.

[0076] Specific preparation steps of the wet leveling liquid composition:

[0077] (1) According to the ratio of each raw material provided in this embodiment, water, isopropanolamine, diglycolamine, C12 dibasic acid and C21 dibasic acid are added to a reaction kettle equipped with a stirrer and a temperature sensor, stirred and heated to 45°C, and continued to stir until completely dissolved;

[0078] (2) adding benzotriazole derivative NEUF714, Guerbet alcohol polyoxyethylene ether and polyisobutylene succinimide and continuing to stir until uniform;

[0079] (3) Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0080] Specific preparation steps of the wet leveling liquid composition:

[0081] 1. According to the ratio of each raw material provided in this embodiment, water, isopropanolamine, diglycolamine, C12 dibasic acid and C21 dibasic acid are added to a reaction kettle equipped with a stirrer and a temperature sensor, stirred and heated to 40-50°C, and continued to stir until completely dissolved;

[0082] 2. Add benzotriazole derivative NEUF714, Guerbet alcohol polyoxyethylene ether and polyisobutylene succinimide and continue stirring until uniform;

[0083] 3. Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0084] Example 3

[0085] A wet leveling liquid composition, comprising, by weight:

[0086] 74.5 parts of water;

[0087] 12 parts of organic base, including 6 parts of diglycolamine and 6 parts of isopropanolamine;

[0088] 9 parts of lubricating rust inhibitor, including 4 parts of C12 dibasic acid and 8 parts of C21 dibasic acid;

[0089] 2 parts of corrosion inhibitor, which is a benzotriazole derivative NEUF714;

[0090] 2 parts of surfactant, which is Guerbet alcohol polyoxyethylene ether;

[0091] The detergent is 0.5 parts, which is polyisobutylene succinimide.

[0092] Specific preparation steps of the wet leveling liquid composition:

[0093] (1) According to the ratio of each raw material provided in this embodiment, water, isopropanolamine, diglycolamine, C12 dibasic acid and C21 dibasic acid are added to a reaction kettle equipped with a stirrer and a temperature sensor, stirred and heated to 45°C, and continued to stir until completely dissolved;

[0094] (2) adding benzotriazole derivative NEUF714, Guerbet alcohol polyoxyethylene ether and polyisobutylene succinimide and continuing to stir until uniform;

[0095] (3) Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0096] Example 4

[0097] A wet leveling liquid composition, comprising, by weight:

[0098] 67.5 parts of water;

[0099] 16 parts of organic base, including 6 parts of diglycolamine and 10 parts of isopropanolamine;

[0100] 10 parts of lubricating rust inhibitor, including 5 parts of C12 dibasic acid and 5 parts of sebacic acid;

[0101] 3 parts of corrosion inhibitor, which is a benzotriazole derivative NEUF714;

[0102] 3 parts of surfactant, which is Guerbet alcohol polyoxyethylene ether;

[0103] The detergent is 0.5 parts, which is polyisobutylene succinimide.

[0104] Specific preparation steps of the wet leveling liquid composition:

[0105] (1) According to the ratio of the raw materials provided in this example, water, isopropanolamine, diglycolamine, C12 dibasic acid and sebacic acid were added to a reaction kettle equipped with a stirrer and a temperature sensor, stirred and heated to 45°C, and continued to stir until completely dissolved;

[0106] (2) adding benzotriazole derivative NEUF714, Guerbet alcohol polyoxyethylene ether and polyisobutylene succinimide and continuing to stir until uniform;

[0107] (3) Continue stirring until the system cools to room temperature to obtain a wet leveling liquid composition.

[0108] Comparative Example 1

[0109] A wet leveling liquid composition, which differs from Example 1 in that the organic base is replaced by 16 parts of diglycolamine.

[0110] Comparative Example 2

[0111] A wet leveling liquid composition, which differs from Example 1 in that the organic base is replaced by 16 parts of isopropanolamine.

[0112] Comparative Example 3

[0113] A wet leveling liquid composition, which differs from Example 1 in that the organic base is replaced by 10 parts of isopropanolamine+6 parts of KOH.

[0114] Comparative Example 4

[0115] A wet leveling liquid composition, which is different from Example 1 in that the organic base is replaced by 6 parts of diglycolamine + 10 parts of KOH.

[0116] Comparative Example 5

[0117] A wet leveling liquid composition, which is different from Example 1 in that the organic base is replaced by 1 part of diglycolamine.

[0118] Sample testing

[0119] (1) Maximum no-seizure load test

[0120] Test method: Refer to GB / T 3142-2019 Determination of load-bearing capacity of lubricants - Four-ball method as the test method to conduct the maximum no-seizure load test. The specific test results are shown in Table 1.

[0121] (2) Lubrication performance test

[0122] Test method: A reciprocating friction and wear tester was selected as the test equipment. The test load was set to 1.1 GPa and the test temperature was 120°C. The lubrication performance test was carried out. The test results are shown in Table 1.

[0123] (3) Residue test

[0124] Test method: The specific method is: take each embodiment and comparative example respectively, prepare a test solution with a mass concentration of 5%, take two pieces of cleaned Q-PANEL and put them into the test solution, take them out and blow dry to test the mass difference before and after, and calculate the residual amount. The test results are shown in Table 1.

[0125] (4) Oil sludge iron powder dispersion performance test

[0126] The test method is as follows: take each embodiment and comparative example respectively, prepare 100mL test solution with a mass concentration of 2%, add 0.5g magnetic filtered sludge and 0.5g iron powder with a particle size of 1μm in a stoppered measuring cylinder, shake vigorously 30 times, observe the dispersion of the sludge and iron powder, and the test results are shown in Table 1.

[0127] (5) Anti-rust performance test

[0128] Test method: refer to "JB / T 9189-2016 Water-based material anti-rust test method cast iron chips test", the test results are shown in Table 1.

[0129] (6) Stacking test

[0130] Test method: Take each embodiment and comparative example respectively, prepare a test solution with a mass concentration of 5%, put two cleaned Q-PANEL test pieces into the test solution for 30 seconds, take them out and stack them for 30 days, observe the macular condition, and the test results are shown in Table 1.

[0131] Table 1

[0132]

[0133] As shown in Table 1, the cleaning wet leveling liquid composition prepared in Example 1 has excellent PB, lubricity, low residue, dispersibility, rust resistance and anti-yellowing effect.

[0134] In Examples 2 and 3, increasing the amount of alkali and lubricating rust inhibitor can significantly improve rust prevention and lubrication, but the residual amount increases.

[0135] The lubricating and rust-inhibiting agents in Example 4 are C12 dibasic acid and sebacic acid, respectively. Since Example 4 uses organic acids with carbon chain lengths greater than or equal to 10 but less than 20, although the residue, dispersibility, rust prevention and anti-yellowing effect of the wet leveling liquid composition are less affected, the lack of a long carbon chain rust-inhibiting lubricant results in significantly insufficient oil film strength and lubrication.

[0136] In Comparative Example 1, all the alkali in Example 1 is diglycolamine. Although the rust resistance is enhanced, the dispersibility of the wet leveling liquid on the sludge iron powder is weakened.

[0137] Comparative Example 2 is to use isopropanolamine as the alkali in Example 1, resulting in poor rust resistance and the appearance of yellow spots.

[0138] In Comparative Example 3, isopropanolamine and KOH were used as organic bases, resulting in weakened anti-rust performance and the appearance of yellow spots.

[0139] In Comparative Example 4, diglycolamine and KOH were used as organic bases, which resulted in yellow spots, indicating that the introduction of inorganic bases was an important cause of the appearance of yellow spots.

[0140] In Comparative Example 5, the amount of diglycolamine was reduced to 1 part, resulting in a significant decrease in the anti-rust performance. The reduction of diglycolamine directly resulted in a decrease in pH and alkali reserve, and good anti-rust performance could not be guaranteed at a lower pH.

[0141] Although the description of the present invention has been quite detailed and specifically describes several described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims in view of the prior art by reference to the appended claims, thereby effectively covering the intended scope of the present invention. In addition, the above description of the present invention is based on the embodiments foreseeable by the inventor, and its purpose is to provide a useful description, and those non-substantial changes to the present invention that have not yet been foreseen may still represent equivalent changes to the present invention.

Claims

1. A wet leveling liquid composition, characterized in that: The wet leveling liquid composition comprises, by weight: Water 50-75.5 parts; 12-24 parts of organic base; 8-16 parts of lubricating and rust-proofing agent; 2-5 parts of corrosion inhibitor; 2-4 parts of surfactant; 0.5-1 part of detergent; The organic base is composed of diglycolamine and a second alkali source; the second alkali source includes at least one of isopropanolamine, N-methyldiethanolamine and triethanolamine; and the weight portion of diglycolamine is not less than 4 parts.

2. A wet leveling fluid composition according to claim 1, characterized in that: The corrosion inhibitor includes at least one of benzotriazole and a benzotriazole derivative NEUF714.

3. A wet leveling fluid composition according to claim 1, characterized in that: The lubricating rust preventive agent is composed of a first lubricant and a second lubricant, wherein the first lubricant is an organic acid with a carbon chain length of not less than 10 and less than 20; and the second lubricant is an organic acid with a carbon chain length of not less than 20.

4. A wet leveling fluid composition according to claim 1, characterized in that: The mass ratio of the organic base to the lubricating rust inhibitor is (1.5-3):

1.

5. A wet leveling fluid composition according to claim 1, characterized in that: The surfactant includes at least one of lauryl alcohol polyoxyethylene ether, isomeric decanol polyoxyethylene ether and Guerbet alcohol polyoxyethylene ether.

6. A wet leveling fluid composition according to claim 1, characterized in that: The detergent includes at least one of succinimide, polyisobutylene succinimide and Mannich base.

7. A wet leveling fluid composition according to any one of claims 1 to 6, characterized in that: By weight, including: 67.5 parts of water; 16 parts of the organic base; 10 parts of the lubricating and rust-inhibiting agent; 3 parts of the corrosion inhibitor; 3 parts of the surfactant; The detergent is 0.5 parts.

8. A wet leveling fluid composition according to claim 7, characterized in that: The organic base is composed of isopropanolamine and diglycolamine, wherein the weight portion of diglycolamine is 6 parts; the lubricating and rust-inhibiting agent is a mixture of C12 dibasic acid and C21 dibasic acid in a mass ratio of 1:1; the corrosion inhibitor is a benzotriazole derivative NEUF714; the surfactant is Guerbet alcohol polyoxyethylene ether; and the detergent is polyisobutylene succinimide.

9. A method for preparing the wet leveling fluid composition according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) mixing water, the organic base and the anti-rust lubricant at 40° C. to 50° C.; (2) adding the corrosion inhibitor, the surfactant and the detergent and mixing them evenly; (3) Continue stirring until the system cools to room temperature to obtain the wet leveling liquid composition.

10. Use of the wet leveling fluid composition according to any one of claims 1 to 8 in the field of metal processing.

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