Anti-oxidation copper rod and preparation method thereof

Abstract

The present application relates to the field of metal coating technology, and specifically discloses an antioxidant copper rod and a preparation method thereof. The preparation method of the antioxidant copper rod of the present application comprises the following steps: applying an antioxidant coating liquid to the surface of the copper rod, and then performing a heat curing treatment to form an antioxidant film on the surface of the copper rod; the antioxidant coating liquid comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 20-30 parts of antioxidant, 15-20 parts of filler, 1-10 parts of anti-ultraviolet agent, 5-10 parts of curing agent, 1-5 parts of leveling agent, and 20-40 parts of solvent; and the silicon chain structure of the antioxidant contains thiol and phenolic hydroxyl groups. The obtained antioxidant coating liquid can form an excellent antioxidant film on the surface of the copper rod, effectively extending the service life of the copper rod, improving its comprehensive performance, meeting the high-quality and high-performance requirements of copper rods in different industries, and has broad market prospects.

Description

Technical Field

[0001] The present application relates to the technical field of metal coatings, and more specifically, to an oxidation-resistant copper rod and a preparation method thereof. Background Art

[0002] In modern industrial production, copper rod, as a fundamental metal material, has been widely used in numerous fields, including electricity, electronics, and construction, thanks to its excellent electrical and thermal conductivity and processing properties. From the manufacture of cables for power transmission, to the precision components of electronic devices, to water supply and drainage pipes in the construction industry, copper rod plays an indispensable role.

[0003] However, copper rods currently on the market generally suffer from poor oxidation resistance. Copper easily reacts chemically with oxygen in air, forming copper rust. This rust not only affects the copper rod's appearance, causing it to lose its luster and develop mottled rust marks, but more seriously, it significantly degrades its performance. On the one hand, the presence of copper rust increases the copper rod's electrical resistance, thereby affecting its conductivity, reducing power transmission efficiency, and increasing energy loss. In power systems, this can lead to increased voltage drop, wasted energy, and even pose safety risks. On the other hand, copper rust weakens the copper rod's mechanical strength, making it more susceptible to breakage during processing and use, reducing product reliability and service life.

[0004] As various industries continue to increase their requirements for the quality and performance of copper rods, various industries have put forward increasingly higher requirements for the quality and performance of copper rods. However, due to insufficient oxidation resistance, existing copper rods can no longer meet the growing market demand. Therefore, the present application provides an oxidation-resistant copper rod and a preparation method thereof. Summary of the Invention

[0005] In order to solve the problem that the existing copper rod has poor anti-oxidation effect, the present application provides an anti-oxidation copper rod and a preparation method thereof.

[0006] In a first aspect, the present application provides a method for preparing an oxidation-resistant copper rod, which adopts the following technical solution:

[0007] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0008] After coating the anti-oxidation coating liquid on the surface of the copper rod, heating and curing treatment is performed to form an anti-oxidation film on the surface of the copper rod;

[0009] The anti-oxidation coating liquid comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 20-30 parts of antioxidant, 15-20 parts of filler, 1-10 parts of anti-ultraviolet agent, 5-10 parts of curing agent, 1-5 parts of leveling agent, and 20-40 parts of solvent.

[0010] Preferably, the method for preparing the antioxidant comprises the following steps:

[0011] S1. Add octamethylcyclotetrasiloxane, 3-mercaptopropylmethyldimethoxysilane, hexamethyldisiloxane, and concentrated sulfuric acid to water, stir evenly at room temperature, and react in an oil bath at 60-70°C under nitrogen protection for 8-12 hours. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter with suction, and rotary evaporate to obtain mercapto silicone oil;

[0012] S2. Add the mercapto silicone oil, 4-allylcatechol, eugenol, and benzophenone obtained in step S1 to toluene, mix them evenly, irradiate them under ultraviolet light for 1-3 hours, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them, and rotary evaporate them to obtain an antioxidant.

[0013] Preferably, the mass ratio of octamethylcyclotetrasiloxane, 3-mercaptopropylmethyldimethoxysilane, hexamethyldisiloxane, concentrated sulfuric acid and water in step S1 is (59-65) g: (36-40) g: (16-20) g: (1.6-2) g: (200-400) g.

[0014] Preferably, the mass ratio of mercapto silicone oil, 4-allylcatechol, eugenol, benzophenone and toluene in step S2 is (50-60) g: (7.5-8) g: (8-8.5) g: (1-1.5) g: (200-400) g.

[0015] Preferably, the filler is obtained by mixing nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:(1-7).

[0016] Preferably, the anti-ultraviolet agent is at least one of UV-320, UV-531, UV-328, UV-1130, UV-326, UV-123, and UV-400.

[0017] Preferably, the curing agent is at least one of maleic anhydride, phthalic anhydride, m-phenylenediamine, diethylenetriamine, ethylenediamine, and phenylenediamine.

[0018] Preferably, the leveling agent is at least one of BYK-333, BYK-332, and BYK-3560.

[0019] Preferably, the solvent is at least one of ethanol, butanone, xylene, and ethylene glycol monobutyl ether.

[0020] In a second aspect, the present application provides an oxidation-resistant copper rod, which adopts the following technical solution:

[0021] An oxidation-resistant copper rod is prepared by the above-mentioned preparation method.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. The antioxidant film on the surface of the copper rod of the present application is formed by heating and curing an antioxidant coating liquid. The antioxidant coating liquid includes epoxy resin, antioxidant, filler, anti-ultraviolet agent, curing agent, leveling agent, and solvent. The components interact with each other, and the resulting copper rod has excellent antioxidant properties, effectively extending the service life of the copper rod, improving its comprehensive performance, and meeting the high-quality and high-performance requirements of copper rods in different industries.

[0024] 2. In the preparation process of the antioxidant of the present application, first, under the catalysis of concentrated sulfuric acid, the siloxy bond of octamethylcyclotetrasiloxane undergoes a ring-opening reaction, and at the same time, the methoxy group of 3-mercaptopropylmethyldimethoxysilane is hydrolyzed to generate a hydroxyl group; the ring-opened octamethylcyclotetrasiloxane and the hydrolyzed 3-mercaptopropylmethyldimethoxysilane are connected through a condensation reaction of the siloxy bond, and the siloxy bond in hexamethyldisiloxane is broken and connected to one end of the polymer chain to obtain mercapto silicone oil. The siloxy bond in the mercapto silicone oil has a high bond energy and stable chemical properties, which can provide a stable skeleton for the entire antioxidant molecule. The framework structure can ensure that the antioxidant can maintain the integrity of its molecules under various complex environmental conditions, thereby continuously exerting its antioxidant effect; then the mercapto group in the mercapto silicone oil can react with the carbon-carbon double bond in 4-allylcatechol and eugenol under the action of the initiator to produce a thiol click reaction to obtain antioxidants. The molecules of 4-allylcatechol and eugenol contain multiple phenolic hydroxyl groups with hydrogen-donating capabilities. In the antioxidant process, the phenolic hydroxyl groups can provide hydrogen atoms to combine with free radicals, converting the free radicals into stable molecules, thereby interrupting the free radical chain reaction and achieving the purpose of antioxidant.

[0025] The antioxidant of the present application greatly enhances the antioxidant effect of the antioxidant due to its stable molecular structure and synergistic effect of multiple functional groups, enabling it to more effectively remove various types of free radicals and protect the copper rod from oxidative damage.

[0026] 3. The filler of this application is a mixture of nano-yttrium oxide and nano-tantalum oxide. When evenly dispersed in an antioxidant coating solution and coated on the surface of a copper rod to form a thin film, it can be tightly arranged to form a dense, continuous protective layer. The nano-yttrium oxide and nano-tantalum oxide synergistically interact with the antioxidant to enhance its antioxidant effect. On the one hand, the surface of the nanomaterial can adsorb antioxidant molecules, making the antioxidant more evenly distributed in the coating and improving its utilization rate. On the other hand, the nano-yttrium oxide and nano-tantalum oxide also affect the electronic structure of the antioxidant molecules, enhancing the hydrogen-donating capacity of the phenolic hydroxyl and thiol groups, thereby more effectively enhancing the antioxidant properties of the copper rod.

[0027] 4. The preparation method of the antioxidant copper rod of the present application has simple steps, low cost, is suitable for industrial production, effectively solves the problem of poor antioxidant performance of existing copper rods, and has broad application prospects. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the embodiments.

[0029] Examples 1-5 provide a method for preparing an oxidation-resistant copper rod.

[0030] Example 1:

[0031] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0032] Step (1) Preparation of antioxidant

[0033] S1. Add 59 g of octamethylcyclotetrasiloxane, 36 g of 3-mercaptopropylmethyldimethoxysilane, 16 g of hexamethyldisiloxane, and 1.6 g of concentrated sulfuric acid (98 wt%) to 200 g of water, stir evenly at room temperature, and react in an oil bath at 60 ° C for 8 h under nitrogen protection. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0034] S2. Add 50 g of the mercaptosilicone oil obtained in step S1, 7.5 g of 4-allylcatechol, 8 g of eugenol, and 1 g of benzophenone to 200 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1 hour, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and evaporate them by rotary evaporation to obtain an antioxidant;

[0035] Step (2) Preparation of antioxidant coating liquid

[0036] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0037] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:1; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; and the solvent is ethanol.

[0038] Step (3) Preparation of Anti-Oxidation Copper Rod

[0039] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0040] Example 2:

[0041] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0042] Step (1) Preparation of antioxidant

[0043] S1. Add 61 g of octamethylcyclotetrasiloxane, 38 g of 3-mercaptopropylmethyldimethoxysilane, 18 g of hexamethyldisiloxane, and 1.7 g of concentrated sulfuric acid (98 wt%) to 250 g of water, stir evenly at room temperature, and react in an oil bath at 62 ° C. under nitrogen protection for 9 h. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter with suction, and rotary evaporate to obtain mercapto silicone oil;

[0044] S2. Add 52 g of the mercaptosilicone oil obtained in step S1, 7.6 g of 4-allylcatechol, 8.2 g of eugenol, and 1.2 g of benzophenone to 250 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1.5 h, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them, and rotary evaporate them to obtain an antioxidant;

[0045] Step (2) Preparation of antioxidant coating liquid

[0046] By weight, 100 parts of epoxy resin, 22 parts of antioxidant, 16 parts of filler, 3 parts of anti-ultraviolet agent, 7 parts of curing agent, 2 parts of leveling agent, and 25 parts of solvent were mixed to obtain an antioxidant coating liquid;

[0047] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:2; the anti-ultraviolet agent is UV-531; the curing agent is phthalic anhydride; the leveling agent is BYK-332; and the solvent is butanone.

[0048] Step (3) Preparation of Anti-Oxidation Copper Rod

[0049] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 110° C. and a pressure of 2.5 MPa for 1.8 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0050] Example 3:

[0051] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0052] Step (1) Preparation of antioxidant

[0053] S1. Add 63 g of octamethylcyclotetrasiloxane, 38 g of 3-mercaptopropylmethyldimethoxysilane, 18 g of hexamethyldisiloxane, and 1.8 g of concentrated sulfuric acid (98 wt%) to 300 g of water, stir evenly at room temperature, and react in an oil bath at 65 ° C under nitrogen protection for 10 h. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0054] S2. Add 55 g of the mercaptosilicone oil obtained in step S1, 7.8 g of 4-allylcatechol, 8.3 g of eugenol, and 1.3 g of benzophenone to 300 g of toluene, mix them evenly, irradiate them under ultraviolet light for 2 h, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and evaporate them by rotary evaporation to obtain an antioxidant;

[0055] Step (2) Preparation of antioxidant coating liquid

[0056] By weight, 100 parts of epoxy resin, 25 parts of antioxidant, 18 parts of filler, 5 parts of anti-ultraviolet agent, 8 parts of curing agent, 2.5 parts of leveling agent, and 30 parts of solvent were mixed to obtain an antioxidant coating liquid;

[0057] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:5; the anti-ultraviolet agent is UV-1130; the curing agent is ethylenediamine; the leveling agent is BYK-3560; and the solvent is xylene.

[0058] Step (3) Preparation of Anti-Oxidation Copper Rod

[0059] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 130° C. and a pressure of 3 MPa for 1.5 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0060] Example 4:

[0061] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0062] Step (1) Preparation of antioxidant

[0063] S1. Add 63 g of octamethylcyclotetrasiloxane, 39 g of 3-mercaptopropylmethyldimethoxysilane, 19 g of hexamethyldisiloxane, and 1.8 g of concentrated sulfuric acid (98 wt%) to 350 g of water, stir evenly at room temperature, and react in an oil bath at 68 ° C. under nitrogen protection for 11 hours. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0064] S2. Add 58 g of the mercaptosilicone oil obtained in step S1, 7.8 g of 4-allylcatechol, 8.4 g of eugenol, and 1.4 g of benzophenone to 350 g of toluene, mix them evenly, irradiate them under ultraviolet light for 2.5 h, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them, and rotary evaporate them to obtain an antioxidant;

[0065] Step (2) Preparation of antioxidant coating liquid

[0066] By weight, 100 parts of epoxy resin, 28 parts of antioxidant, 18 parts of filler, 8 parts of anti-ultraviolet agent, 9 parts of curing agent, 4 parts of leveling agent, and 35 parts of solvent were mixed to obtain an antioxidant coating liquid;

[0067] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 1:2; the anti-ultraviolet agent is UV-320; the curing agent is diethylenetriamine; the leveling agent is BYK-333; and the solvent is xylene.

[0068] Step (3) Preparation of Anti-Oxidation Copper Rod

[0069] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 140° C. and a pressure of 3.5 MPa for 1.2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0070] Example 5:

[0071] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0072] Step (1) Preparation of antioxidant

[0073] S1. Add 65 g of octamethylcyclotetrasiloxane, 40 g of 3-mercaptopropylmethyldimethoxysilane, 20 g of hexamethyldisiloxane, and 2 g of concentrated sulfuric acid (98 wt%) to 400 g of water, stir evenly at room temperature, and react in an oil bath at 70 ° C under nitrogen protection for 12 h. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0074] S2. Add 60 g of the mercaptosilicone oil obtained in step S1, 8 g of 4-allylcatechol, 8.5 g of eugenol, and 1.5 g of benzophenone to 400 g of toluene, mix them evenly, irradiate them under ultraviolet light for 3 h, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them, and rotary evaporate them to obtain an antioxidant;

[0075] Step (2) Preparation of antioxidant coating liquid

[0076] By weight, 100 parts of epoxy resin, 30 parts of antioxidant, 20 parts of filler, 10 parts of anti-ultraviolet agent, 10 parts of curing agent, 5 parts of leveling agent, and 40 parts of solvent were mixed to obtain an antioxidant coating liquid;

[0077] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:7; the anti-ultraviolet agent is a mixture of UV-320 and UV-326 in a mass ratio of 2:1; the curing agent is a mixture of maleic anhydride and ethylenediamine in a mass ratio of 1:1; the leveling agent is BYK-333; and the solvent is ethanol.

[0078] Step (3) Preparation of Anti-Oxidation Copper Rod

[0079] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 150° C. and a pressure of 4 MPa for 1 hour to form an anti-oxidation film on the surface of the copper rod to obtain an anti-oxidation copper rod.

[0080] In order to verify the comprehensive performance of the anti-oxidation copper rods obtained in Examples 1-5 of the present application, the applicant set up comparative examples 1-5, which are as follows:

[0081] Comparative Example 1

[0082] Comparative Example 1 is different from Example 1 only in that 4-allylcatechol of equal mass is used to replace eugenol, as follows:

[0083] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0084] Step (1) Preparation of antioxidant

[0085] S1. Add 59 g of octamethylcyclotetrasiloxane, 36 g of 3-mercaptopropylmethyldimethoxysilane, 16 g of hexamethyldisiloxane, and 1.6 g of concentrated sulfuric acid (98 wt%) to 200 g of water, stir evenly at room temperature, and react in an oil bath at 60 ° C for 8 h under nitrogen protection. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0086] S2. Add 50 g of the mercaptosilicone oil obtained in step S1, 15.5 g of 4-allylcatechol, and 1 g of benzophenone to 200 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1 hour, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them, and rotary evaporate them to obtain an antioxidant;

[0087] Step (2) Preparation of antioxidant coating liquid

[0088] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0089] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:1; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; and the solvent is ethanol.

[0090] Step (3) Preparation of Anti-Oxidation Copper Rod

[0091] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0092] Comparative Example 2

[0093] Comparative Example 2 is different from Example 1 only in that 4-allylcatechol is replaced with eugenol of equal mass, as follows:

[0094] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0095] Step (1) Preparation of antioxidant

[0096] S1. Add 59 g of octamethylcyclotetrasiloxane, 36 g of 3-mercaptopropylmethyldimethoxysilane, 16 g of hexamethyldisiloxane, and 1.6 g of concentrated sulfuric acid (98 wt%) to 200 g of water, stir evenly at room temperature, and react in an oil bath at 60 ° C for 8 h under nitrogen protection. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0097] S2. Add 50 g of the mercaptosilicone oil obtained in step S1, 15.5 g of eugenol, and 1 g of benzophenone to 200 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1 h, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and rotary evaporate them to obtain an antioxidant;

[0098] Step (2) Preparation of antioxidant coating liquid

[0099] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0100] The epoxy resin is E-51; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:1; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; and the solvent is ethanol.

[0101] Step (3) Preparation of Anti-Oxidation Copper Rod

[0102] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0103] Comparative Example 3

[0104] Comparative Example 3 is different from Example 1 only in that the antioxidant is antioxidant 1010, specifically as follows:

[0105] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0106] Step (1) Preparation of antioxidant coating liquid

[0107] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0108] The epoxy resin is E-51; the antioxidant is antioxidant 1010; the filler is a mixture of nano-yttrium oxide and nano-tantalum oxide in a mass ratio of 3:1; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; and the solvent is ethanol.

[0109] Step (2) Preparation of Anti-Oxidation Copper Rod

[0110] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0111] Comparative Example 4

[0112] Comparative Example 4 is different from Example 1 only in that the filler is nano yttrium oxide, specifically as follows:

[0113] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0114] Step (1) Preparation of antioxidant

[0115] S1. Add 59 g of octamethylcyclotetrasiloxane, 36 g of 3-mercaptopropylmethyldimethoxysilane, 16 g of hexamethyldisiloxane, and 1.6 g of concentrated sulfuric acid (98 wt%) to 200 g of water, stir evenly at room temperature, and react in an oil bath at 60 ° C for 8 h under nitrogen protection. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0116] S2. Add 50 g of the mercaptosilicone oil obtained in step S1, 7.5 g of 4-allylcatechol, 8 g of eugenol, and 1 g of benzophenone to 200 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1 hour, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and evaporate them by rotary evaporation to obtain an antioxidant;

[0117] Step (2) Preparation of antioxidant coating liquid

[0118] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0119] Among them, the epoxy resin is E-51; the filler is nano yttrium oxide; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; the solvent is ethanol;

[0120] Step (3) Preparation of Anti-Oxidation Copper Rod

[0121] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0122] Comparative Example 5

[0123] Comparative Example 5 is different from Example 1 only in that the filler is nano-tantalum oxide, specifically as follows:

[0124] A method for preparing an oxidation-resistant copper rod comprises the following steps:

[0125] Step (1) Preparation of antioxidant

[0126] S1. Add 59 g of octamethylcyclotetrasiloxane, 36 g of 3-mercaptopropylmethyldimethoxysilane, 16 g of hexamethyldisiloxane, and 1.6 g of concentrated sulfuric acid (98 wt%) to 200 g of water, stir evenly at room temperature, and react in an oil bath at 60 ° C for 8 h under nitrogen protection. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter it with suction, and rotary evaporate to obtain mercapto silicone oil;

[0127] S2. Add 50 g of the mercaptosilicone oil obtained in step S1, 7.5 g of 4-allylcatechol, 8 g of eugenol, and 1 g of benzophenone to 200 g of toluene, mix them evenly, irradiate them under ultraviolet light for 1 hour, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and evaporate them by rotary evaporation to obtain an antioxidant;

[0128] Step (2) Preparation of antioxidant coating liquid

[0129] By weight, 100 parts of epoxy resin, 20 parts of antioxidant, 15 parts of filler, 1 part of anti-ultraviolet agent, 5 parts of curing agent, 1 part of leveling agent, and 20 parts of solvent were mixed uniformly to obtain an antioxidant coating liquid;

[0130] Among them, the epoxy resin is E-51; the filler is nano-tantalum oxide; the anti-ultraviolet agent is UV-320; the curing agent is maleic anhydride; the leveling agent is BYK-333; the solvent is ethanol;

[0131] Step (3) Preparation of Anti-Oxidation Copper Rod

[0132] After the anti-oxidation coating liquid is coated on the surface of the copper rod, it is heated and cured at a temperature of 100° C. and a pressure of 2 MPa for 2 hours to form an anti-oxidation film on the surface of the copper rod, thereby obtaining an anti-oxidation copper rod.

[0133] The comprehensive properties of the antioxidant copper rods obtained in Examples 1-5 of the present application and Comparative Examples 1-5 were tested respectively, and the test results are shown in Table 1 below.

[0134] (1) According to GB / T1865-1997 “Paints and varnishes - Artificial weathering and artificial radiation exposure”, the antioxidant copper rods prepared in Examples 1-5 and Comparative Examples 1-5 were subjected to an artificial weathering test for 1500 hours;

[0135] (2) The antioxidant copper rods prepared in Examples 1-5 and Comparative Examples 1-5 were kept at 200°C for 15 minutes, and then subjected to a hot-cold alternating test. After 150 cycles, the rods were tested for cracks. The rods were then kept at 250°C for 15 minutes, and then subjected to a hot-cold alternating test. After 50 cycles, the rods were tested for cracks. The rods were then kept at 300°C for 15 minutes, and then subjected to a hot-cold alternating test. After 30 cycles, the rods were tested for cracks.

[0136] (3) The water resistance (25°C, 300h) of the antioxidant copper rods prepared in Examples 1-5 and Comparative Examples 1-5 was tested in accordance with GB 5209-1985 “Determination of water resistance of paints and varnishes - Immersion method”. The test standard was no blistering and no rusting.

[0137] Table 1:

[0138]

[0139] It can be seen from the data shown in Table 1 above that the antioxidant films on the surfaces of the antioxidant copper rods obtained in Examples 1-5 have better adhesion, denser structure, and greater durability than those in Comparative Examples 1-5. They have excellent antioxidant properties, high temperature resistance, and water resistance, are green and environmentally friendly, and have broad market prospects.

[0140] The antioxidant coating liquid used for the copper rod in Example 1 contains 4-allylcatechol and eugenol as the raw materials for preparing the antioxidant. Compared with Comparative Examples 1 and 2, it is fully demonstrated that the interaction between 4-allylcatechol and eugenol leads to synergistic effect, which greatly improves the antioxidant performance of the copper rod.

[0141] The antioxidant coating liquid used for the copper rod in Example 1, the raw materials for preparing the antioxidant include octamethylcyclotetrasiloxane, 3-mercaptopropylmethyldimethoxysilane, hexamethyldisiloxane, 4-allylcatechol and eugenol. Compared with Comparative Example 3, it is fully demonstrated that the antioxidant of the present application can significantly enhance the antioxidant properties of the copper rod.

[0142] The antioxidant coating liquid used for the copper rod in Example 1 has a filler obtained by mixing nano-yttrium oxide and nano-tantalum oxide. Compared with Comparative Examples 4 and 5, it is fully demonstrated that nano-yttrium oxide and nano-tantalum oxide synergistically enhance the antioxidant performance, high temperature resistance and water resistance of the copper rod.

[0143] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for preparing an oxidation-resistant copper rod, characterized in that: The following steps are involved: After coating the anti-oxidation coating liquid on the surface of the copper rod, heating and curing treatment is performed to form an anti-oxidation film on the surface of the copper rod; The anti-oxidation coating liquid comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 20-30 parts of antioxidant, 15-20 parts of filler, 1-10 parts of anti-ultraviolet agent, 5-10 parts of curing agent, 1-5 parts of leveling agent, and 20-40 parts of solvent; The preparation method of the antioxidant comprises the following steps: S1. Add octamethylcyclotetrasiloxane, 3-mercaptopropylmethyldimethoxysilane, hexamethyldisiloxane, and concentrated sulfuric acid to water, stir evenly at room temperature, and react in an oil bath at 60-70°C under nitrogen protection for 8-12 hours. Cool to room temperature, add excess calcium hydroxide to the reaction solution to neutralize the concentrated sulfuric acid, filter, add excess anhydrous magnesium sulfate to the obtained filtrate, dry it, filter with suction, and rotary evaporate to obtain mercapto silicone oil; S2. Add the mercaptosilicone oil, 4-allylcatechol, eugenol, and benzophenone obtained in step S1 to toluene, mix them evenly, irradiate them under ultraviolet light for 1-3 hours, concentrate them under reduced pressure, wash them, add anhydrous magnesium sulfate to dry them, filter them with suction, and rotary evaporate them to obtain an antioxidant; The filler is obtained by mixing nano yttrium oxide and nano tantalum oxide in a mass ratio of 3:(1-7).

2. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The mass ratio of octamethylcyclotetrasiloxane, 3-mercaptopropylmethyldimethoxysilane, hexamethyldisiloxane, concentrated sulfuric acid and water in step S1 is (59-65) g: (36-40) g: (16-20) g: (1.6-2) g: (200-400) g.

3. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The mass ratio of the mercapto silicone oil, 4-allylcatechol, eugenol, benzophenone and toluene in step S2 is (50-60) g: (7.5-8) g: (8-8.5) g: (1-1.5) g: (200-400) g.

4. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The anti-ultraviolet agent is at least one of UV-320, UV-531, UV-328, UV-1130, UV-326, UV-123, and UV-400.

5. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The curing agent is at least one of maleic anhydride, phthalic anhydride, m-phenylenediamine, diethylenetriamine, ethylenediamine, and phenylenediamine.

6. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The leveling agent is at least one of BYK-333, BYK-332, and BYK-3560.

7. The method for preparing an oxidation-resistant copper rod according to claim 1, wherein: The solvent is at least one of ethanol, butanone, xylene, and ethylene glycol monobutyl ether.

8. An oxidation-resistant copper rod prepared by the preparation method according to any one of claims 1 to 7.

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