Stainless steel cold rolling liquid composition and preparation method and application thereof

Abstract

The invention provides a stainless steel cold rolling liquid composition as well as a preparation method and application thereof, and the composition comprises the following components in parts by weight: 3-10 parts of an anti-wear reagent at extreme pressure; 1-5 parts of an emulsifier; 0.5-8 parts of a corrosion inhibitor; 0.5 to 3 parts of an antioxidant; 0 to 0.5 part of a defoaming agent; 0.1-1 part of a bactericide; 73 to 94.5 parts of an oiliness agent; wherein the bactericide is selected from an iodo-carbamate bactericide and a triazine bactericide. The composition disclosed by the invention has the advantages of low odor, adjustable lubricity, good cooling performance, moderate emulsion stability and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel cold rolling process lubrication, and in particular relates to a stainless steel rolling liquid composition and a preparation method and application thereof. Background Art

[0002] Lubricants for stainless steel cold rolling process are usually divided into pure oil type stainless steel cold rolling oil and water emulsified stainless steel cold rolling liquid. Among them, water emulsified stainless steel cold rolling liquid is widely used in cold rolling process due to its adjustable lubricity, good cooling performance, moderate emulsification stability and no oil mist generated during operation. In order to ensure the use effect of cold rolling liquid, additives such as oiliness agent, extreme pressure anti-wear agent, emulsifier, etc. are usually required to be added to the formula. These additives have more or less certain characteristic chemical odors, and the cold rolling liquid blended by these additives also has a characteristic odor of rolling liquid to a certain extent. In recent years, as enterprises have gradually deepened their attention to the environment and health, out of consideration for the health of employees, steel mills have higher and higher requirements for the on-site working environment, and the odor of the rolling site has also received more and more attention. Therefore, it is necessary to provide a low-odor cold rolling liquid.

[0003] For example, Chinese patent application CN201910005275.7 discloses a water-soluble stainless steel seamless pipe cold rolling liquid and a preparation method thereof, and Chinese patent application CN202110700797.6 discloses a clean fully synthetic stainless steel cold rolling liquid composition and its use; however, the solutions disclosed in these patent applications do not solve the problem of odor generated by the composition.

[0004] Therefore, it is necessary to provide a stainless steel cold rolling liquid product with low odor, adjustable lubricity, good cooling performance, and moderate emulsification stability. Summary of the invention

[0005] In view of this, in order to solve the above problems in the prior art, the present invention proposes a stainless steel cold rolling liquid composition and a preparation method and application thereof, wherein the composition has the advantages of low odor, adjustable lubricity, good cooling performance and moderate emulsification stability.

[0006] The technical problem of the present invention is achieved through the following technical solutions.

[0007] In a first aspect, the present invention provides a stainless steel cold rolling liquid composition, wherein, in parts by weight, the stainless steel cold rolling liquid composition comprises:

[0008]

[0009] Wherein, the fungicide is selected from iodocarbamate and triazine fungicide.

[0010] As a specific embodiment of the present invention, the extreme pressure anti-wear agent is selected from acidic phosphates, phosphites, self-emulsifying phosphates, alkyl phosphonates, phosphate amine salts, thiophosphate amine salts, olefin sulphurization, sulphurized fatty acid esters, sulphurized fatty oils and boric acid esters. Preferably, the extreme pressure anti-wear agent is selected from acidic phosphates, olefin sulphurization, boric acid esters and sulphurized fatty acid esters. For example, the extreme pressure anti-wear agent comprises or is composed of acidic phosphates, olefin sulphurization, boric acid esters and sulphurized fatty acid esters, and the mass ratio of acidic phosphates, olefin sulphurization, boric acid esters and sulphurized fatty acid esters is 1:(1-2):(1-2):(1-2).

[0011] As a specific embodiment of the present invention, the emulsifier is selected from octylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid and tallow amine polyoxyethylene ether.

[0012] As a specific embodiment of the present invention, the corrosion inhibitor is selected from naphthenate, sodium petroleum sulfonate, barium petroleum sulfonate, benzotriazole, tolyltriazole derivatives, thiadiazole derivatives, synthetic barium sulfonate, organic amine, long-chain dibasic acid and dialkyl dithiophosphate.

[0013] Preferably, the corrosion inhibitor is selected from the group consisting of sodium petroleum sulfonate, tolyltriazole derivatives, synthetic barium sulfonate, dialkyl dithiophosphates and organic amines.

[0014] As a specific embodiment of the present invention, the antioxidant is selected from shielded phenolic antioxidants or amine antioxidants. Examples of shielded phenolic antioxidants suitable for use in the present invention include, but are not limited to: BHT (tert-butyl hydroxybenzoate). Examples of amine antioxidants suitable for use in the present invention include, but are not limited to: L67.

[0015] As a specific embodiment of the present invention, the defoaming agent is selected from at least one of an organic siloxane copolymer and an amino silicone oil.

[0016] As a specific embodiment of the present invention, the oiliness agent is selected from animal oil, vegetable oil, synthetic ester, tall oil, oleic acid and fatty acid ester.

[0017] Preferably, the vegetable oil is selected from palm oil, rapeseed oil, soybean oil and coconut oil.

[0018] Preferably, the synthetic ester is selected from the group consisting of triolein, trimethylolpropane oleate, trimethylolpropane tricocoate, pentaerythritol decanoate and pentaerythritol tetraoleate.

[0019] In some specific embodiments, the oiliness agent is selected from one or more of rapeseed oil, oleic acid, triolein, soybean oil, trimethylolpropane oleate, palm oil, pentaerythritol tetraoleate, trimethylolpropane tricocoate, and pentaerythritol decanoate. For example, in parts by weight, the oiliness agent includes 0.5-4 parts, preferably 2-4 parts of triolein; 40-50 parts of rapeseed oil; and 20-30 parts of trimethylolpropane tricocoate.

[0020] In a second aspect, the present invention provides a method for preparing a stainless steel cold rolling liquid composition, characterized in that the method comprises the following steps:

[0021] S1: mixing the extreme pressure anti-wear agent and the oiliness agent, heating and stirring to obtain a mixture;

[0022] S2: adding an emulsifier, a corrosion inhibitor, an antioxidant, a defoamer, and a bactericide to the mixture obtained in step S1 in sequence, heating and stirring, and cooling to obtain a stainless steel cold rolling liquid composition.

[0023] As a specific embodiment of the present invention, the heating and stirring conditions in step S1 and step S2 independently include: temperature of 45-55° C.; stirring rate of 300-500 rpm; stirring time of 0.5-2 h.

[0024] In a third aspect, the present invention provides the use of the stainless steel cold rolling liquid composition of the first aspect or the stainless steel cold rolling liquid composition prepared by the preparation method of the second aspect in the field of lubrication of stainless steel cold rolling process.

[0025] As a specific embodiment of the present invention, the stainless steel cold rolling liquid composition is diluted with desalted water to form a milky white emulsion with a weight percentage concentration of 3-8%, which is used in the lubrication of the stainless steel cold rolling process.

[0026] The above raw materials in the present invention can be prepared in-house or commercially available, and the present invention is not particularly limited thereto.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The stainless steel cold rolling liquid composition provided by the present invention is prepared by selectively compounding and synergizing extreme pressure anti-wear agents, emulsifiers, corrosion inhibitors, antioxidants, defoamers, bactericides and oiliness agents. In particular, the stainless steel cold rolling liquid composition of the present invention uses low-odor additives and integrates bactericides into the main formula, thereby reducing the characteristic chemical odor of the additives and reducing the possibility of emulsion deterioration and generation of odor due to bacteria. Therefore, the obtained stainless steel cold rolling liquid composition has the advantages of low odor, adjustable lubricity, good cooling performance and moderate emulsification stability. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific embodiments, but they do not constitute any limitation to the present invention.

[0030] Example 1

[0031] This example is used to illustrate a low-odor stainless steel cold rolling liquid composition and a preparation method thereof. The raw materials are prepared according to the formula in Table 1, specifically:

[0032] S1: Add extreme pressure anti-wear agent and oiliness agent into a stirred reactor, heat and stir at 50±5°C to obtain a mixture;

[0033] S2: Add emulsifier, corrosion inhibitor, antioxidant, defoamer and bactericide to the mixture obtained in step S1 in sequence, stir at 50±5° C. until all dissolved, and cool to room temperature to obtain a stainless steel cold rolling liquid composition.

[0034] Embodiment 2-5

[0035] According to the formulation in Table 1, a stainless steel cold rolling liquid composition was prepared according to the method in Example 1.

[0036] Table 1 Stainless steel cold rolling liquid composition formula of Examples 1 to 5 (parts by weight)

[0037]

[0038]

[0039] Comparative Example 1

[0040] The composition was prepared according to the contents disclosed in Example 1 of patent application CN201910005275.7. The specific components of the formula were as follows: 60% of diethylene glycol was first heated to about 40-50°C, and then 10% of high molecular weight polymer phosphate, 20% of boric acid ester, 5% of polyethylene glycol oleate, 3% of diethylene glycol monobutyl ether, and 2% of triethanolamine were added and stirred evenly to blend. The odor evaluation results of the composition are shown in Table 2. The composition was emulsified with water and simulated on-site circulation for 14 days. The odor evaluation results before circulation are shown in Table 3, and the odor evaluation results after circulation are shown in Table 4.

[0041] Comparative Example 2

[0042] The composition was prepared according to the contents disclosed in Example 2 of patent application CN202110700797.6, and the specific components of the formula were: 5 parts of sulfurized olefin E35, 2 parts of self-emulsifying phosphate ester 410P, 2 parts of octylphenol polyoxyethylene ether OP, 0.5 parts of high molecular weight polymer surfactant ZL21, 2 parts of sodium petroleum sulfonate, 2 parts of shielded phenolic antioxidant T501, 0.05 parts of three-dimensional siloxane MS575, 50 parts of rapeseed oil, 1.95 parts of oleic acid, and 35 parts of soybean oil were blended and stirred at 45°C. The odor evaluation results are shown in Table 2. The composition was emulsified with water and simulated on-site circulation for 14 days. The odor evaluation results before circulation are shown in Table 3, and the odor evaluation results after circulation are shown in Table 4.

[0043] Comparative Example 3

[0044] The composition was prepared according to Example 1 of the present patent, except that no bactericide was added in Comparative Example 3, 4 parts of triolein were added, and the amounts of other additives were the same. The odor evaluation results are shown in Table 2. The composition was emulsified with water and simulated on-site circulation for 14 days. The odor evaluation results before circulation are shown in Table 3, and the odor evaluation results after circulation are shown in Table 4.

[0045] Performance Testing

[0046] 1. Odor blind sample evaluation method

[0047] (1) Samples were labeled in the form of blind samples and 10 people engaged in stainless steel cold rolling process operations were invited to conduct evaluation.

[0048] (2) Odor evaluation method: Nose sniffing. Open the bottle containing the sample and place it about 50 cm below and in front of the nose. Use your hand to gently fan the bottle mouth to allow a very small amount of gas to enter the nostrils and then smell it.

[0049] (3) Odor evaluation level: pungent odor - odor - low odor - almost odorless.

[0050] (4) Result statistics: The number of voters for each odor level was calculated. The odor evaluation results of the stainless steel cold rolling liquid composition are shown in Table 2.

[0051] Table 2 Blind sample evaluation of the odor of the stainless steel cold rolling liquid composition of Examples 1 to 5 and Comparative Examples 1 to 2

[0052] Odor level Pungent smell Smell Low odor Almost tasteless Example 1 0 0 5 5 Example 2 0 0 4 6 Example 3 0 0 4 6 Example 4 0 0 8 2 Example 5 0 0 5 5 Comparative Example 1 4 5 1 0 Comparative Example 2 3 7 0 0 Comparative Example 3 0 0 5 5

[0053] 2. Blind sample evaluation of the odor of the emulsified composition after adding water

[0054] To simulate the actual working conditions, the compositions in the above embodiments and comparative examples were emulsified with water to prepare a 3% concentration emulsion, and the mixture was stirred for 14 days to simulate the actual use conditions. The instruments used were as follows: JZ-Ⅱ Sifang brand homogenizer, homogenizing cup provided by the instrument, CH1006 super thermostatic bath; the experimental method was as follows:

[0055] (1) Add 9 grams of the composition and 291 grams of deionized water into a homogenizing cup, and place it in a homogenizer at a speed of 1000 r / min for 1 minute. Repeat this step to prepare a total of 3000 grams of emulsion.

[0056] (2) The odor of the emulsion prepared by adding water to the composition was subjected to a blind odor evaluation according to the method of blind odor evaluation. The odor evaluation results are shown in Table 3.

[0057] (3) Place the emulsion in a CH1006 super thermostatic bath, control the temperature to 55°C, and stir in a cycle for 14 days.

[0058] (4) The odor of the emulsion of the composition circulated for 14 days was blindly evaluated according to the method of blind odor evaluation. The odor evaluation results are shown in Table 4.

[0059] Table 3 Blind sample evaluation of the odor of the stainless steel cold rolling liquid composition emulsion of Examples 1 to 5 and Comparative Examples 1 to 2

[0060] Odor level Pungent smell Smell Low odor Almost tasteless Example 1 0 0 3 7 Example 2 0 0 4 6 Example 3 0 0 4 6 Example 4 0 0 7 3 Example 5 0 0 5 5 Comparative Example 1 3 6 1 0 Comparative Example 2 3 7 0 0 Comparative Example 3 0 0 4 6

[0061] Table 4 Blind sample evaluation of odor of stainless steel cold rolling liquid emulsion after 14-day circulation

[0062] Odor level Pungent smell Smell Low odor Almost tasteless Example 1 0 0 6 4 Example 2 0 0 7 3 Example 3 0 0 8 2 Example 4 0 0 7 3 Example 5 0 0 6 4 Comparative Example 1 8 2 0 0 Comparative Example 2 6 4 0 0 Comparative Example 3 1 2 6 1

[0063] As shown in Tables 2 and 3, the odor sensitivity of the stainless steel cold rolling liquid composition and the emulsion emulsified with water in Examples 1 to 5 is much better than that of the comparative example. As shown in Table 4, the odor sensitivity of the emulsion emulsified with water in Examples 1 to 5 after 14 days of circulation is much better than that of the comparative example. By comparing Example 1 with Comparative Example 3, it can be seen that the odor sensitivity of the emulsion emulsified with water in Example 1 after 14 days of circulation is much better than that of Comparative Example 3. Without wishing to be limited by theory, it is believed that the addition of low-odor additives and bactericides in the present invention reduces the possibility of the emulsion deteriorating and producing odor due to bacteria while reducing the characteristic odor of the chemicals brought by the additives.

[0064] 3. Lubricity, cooling properties and emulsification stability

[0065] Evaluation method of lubricity: According to GB / T 3142, the maximum no-seizure load P of the embodiment and the comparative example was evaluated using a four-ball extreme pressure tester (MRS-10). B , the results are shown in Table 5.

[0066] The embodiments and comparative examples of the present invention need to be diluted with water during use, so they have better cooling properties than oil-based products.

[0067] Evaluation method of emulsion stability: After the compositions of the embodiments and comparative examples of the present invention were emulsified with water, the emulsion stability of the 3% concentration emulsion was left for 24 hours. The results are shown in Table 5.

[0068] Table 5 Lubricity of stainless steel cold rolling liquid composition and emulsion stability of its emulsion

[0069]

[0070] As can be seen from Table 5, the stainless steel cold rolling liquid composition of the present invention has adjustable lubricity, good cooling performance and moderate emulsification stability.

[0071] In summary, in the stainless steel cold rolling liquid composition of the present invention, the compounding and synergistic coordination of the extreme pressure anti-wear agent, emulsifier, corrosion inhibitor, antioxidant, defoaming agent and oiliness agent makes the prepared cold rolling liquid composition have adjustable lubricity, good cooling performance and moderate emulsification stability, which meets the use requirements of on-site cold rolling process lubrication and can be used in industrial applications of stainless steel cold rolling process lubrication.

[0072] Any numerical value mentioned in the present invention, if there is only an interval of two units between any minimum value and any maximum value, includes all values ​​from the minimum value to the maximum value each time increasing by one unit. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, time, etc. is declared to be 50-90, in this specification it means that 51-89, 52-88... and 69-71 and 70-71 are specifically listed. For non-integer values, 0.1, 0.01, 0.001 or 0.0001 can be appropriately considered as a unit. These are just some specially specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0073] It should be noted that the embodiments described above are only used to explain the present invention and do not constitute any limitation to the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention. Although the present invention described therein relates to specific methods, materials and embodiments, it does not mean that the present invention is limited to the specific examples disclosed therein, on the contrary, the present invention can be extended to all other methods and applications with the same functions.

Claims

1. A stainless steel cold rolling liquid composition, wherein: The stainless steel cold rolling liquid composition comprises, by weight: Wherein, the fungicide is selected from iodocarbamate and triazine fungicide.

2. The stainless steel cold rolling liquid composition according to claim 1, characterized in that: The extreme pressure anti-wear agent is selected from acidic phosphates, phosphites, self-emulsifying phosphates, alkyl phosphonates, phosphate amine salts, thiophosphate amine salts, sulphurized olefins, sulphurized fatty acid esters, sulphurized fatty oils and borates; Preferably, the extreme pressure anti-wear agent is selected from acidic phosphate esters, sulfurized olefins, boric acid esters and sulfurized fatty acid esters.

3. The stainless steel cold rolling liquid composition according to claim 1 or 2, characterized in that: The emulsifier is selected from octylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid and tallow amine polyoxyethylene ether.

4. The stainless steel cold rolling liquid composition according to any one of claims 1 to 3, characterized in that: The corrosion inhibitor is selected from naphthenates, sodium petroleum sulfonates, barium petroleum sulfonates, benzotriazoles, tolyltriazole derivatives, thiadiazole derivatives, synthetic barium sulfonates, organic amines, long-chain dibasic acids, and dialkyl dithiophosphates; Preferably, the corrosion inhibitor is selected from the group consisting of sodium petroleum sulfonate, tolyltriazole derivatives, synthetic barium sulfonate, dialkyl dithiophosphates and organic amines.

5. The stainless steel cold rolling liquid composition according to any one of claims 1 to 4, characterized in that: The antioxidant is selected from shielded phenolic antioxidants or amine antioxidants; And / or, the defoaming agent is selected from organic siloxane copolymers and amino silicone oils.

6. The stainless steel cold rolling liquid composition according to any one of claims 1 to 5, characterized in that: The oiliness agent is selected from animal oil, vegetable oil, synthetic ester, tall oil, oleic acid and fatty acid ester; Preferably, the vegetable oil is selected from palm oil, rapeseed oil, soybean oil and coconut oil; and / or the synthetic ester is selected from triolein, trimethylolpropane oleate, trimethylolpropane tricocoate, pentaerythritol decanoate and pentaerythritol tetraoleate.

7. The method for preparing the stainless steel cold rolling liquid composition according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: S1: mixing the extreme pressure anti-wear agent and the oiliness agent, heating and stirring to obtain a mixture; S2: adding an emulsifier, a corrosion inhibitor, an antioxidant, a defoamer, and a bactericide to the mixture obtained in step S1 in sequence, heating and stirring, and cooling to obtain a stainless steel cold rolling liquid composition.

8. The preparation method according to claim 7, characterized in that: The conditions for heating and stirring in step S1 and step S2 independently include: The temperature is 45-55°C; the stirring rate is 300-500 rpm; and the stirring time is 0.5-2 h.

9. Use of the stainless steel cold rolling liquid composition according to any one of claims 1 to 6 or the stainless steel cold rolling liquid composition prepared by the preparation method according to claim 7 or 8 in the field of lubrication of stainless steel cold rolling process.

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