Aerosol type insulating layer spray and preparation method thereof

Abstract

The invention relates to the technical field of insulating layer spraying agents of electric wires and cables, and particularly discloses an aerial fog type insulating layer spraying agent and a preparation method thereof. An aerosol type insulating layer spray comprises a compound solution and a propellant, and the compound solution comprises 18%-25% of polyvinyl chloride, 3%-6% of natural rubber, 1%-3% of vinyl chloride-vinyl acetate resin, 30%-35% of cyclohexanone, 20%-30% of ethyl acetate, 12%-16% of isopropanol, 0.04%-0.06% of an antioxidant, 0.04%-0.06% of isooctyl phenyl polyoxyethylene ether, 0.02%-0.08% of sodium benzoate, 0.5%-2% of toner and 0.1%-1% of essence. The aerial fog type insulating layer spray has good insulativity, bonding strength and aging resistance, and can simply, conveniently and quickly repair an insulating layer of a wire and a cable.

Description

Technical Field

[0001] The invention relates to the technical field of insulating layer sprays for electric wires and cables, and in particular to an aerosol type insulating layer spray and a preparation method thereof. Background Art

[0002] In today's modern life, household appliances have become an indispensable part of life, and their popularity and use have greatly improved people's quality of life. However, during the use of electrical appliances, wires and cables will inevitably be affected by their own or external forces, causing the insulation layer to wear, age or even break, which not only affects the service life of wires and cables, but may also cause safety accidents.

[0003] Traditionally, the repair method for damaged wire insulation layer mainly relies on manual operation, usually cutting the damaged part of the wire to the same length as the intact insulation layer, then rewiring and wrapping it with materials such as insulating tape, and sometimes directly wrapping insulating tape around the damaged part. This repair method is not only complicated to operate and requires certain operating skills, but it is also easy to cause secondary damage to the internal conductor of the wire during the processing. In addition, due to the obstruction of the tape, it is difficult to find potential problems of the wire at the winding point, such as poor contact, short circuit or re-damage. At the same time, the durability and insulation performance of the tape are also difficult to meet the requirements of long-term use.

[0004] Given the limitations of traditional repair methods, it is particularly important to develop a product that can easily and quickly repair the insulation layer of wires. Summary of the invention

[0005] In order to easily and quickly repair the insulation layer of wires, the present application provides an aerosol-type insulation layer spray and a preparation method thereof. The aerosol-type insulation layer spray of the present application has good insulation, bonding strength and aging resistance, can easily and quickly repair the insulation layer of wires and cables, can quickly form a uniform and dense insulation layer on the surface of damaged wires and cables, effectively prevent safety accidents caused by wear, aging or damage of the insulation layer of wires and cables, and greatly improve the safety and service life of wires and cables.

[0006] In the first aspect, the present application provides an aerosol type insulating layer spray adopts the following technical solution: An aerosol type insulating layer spray comprises a compound solution and a propellant. The compound solution comprises the following raw materials in percentage by mass: 18% to 25% polyvinyl chloride, 3% to 6% natural rubber, 1% to 3% chloroacetic resin, 30% to 35% cyclohexanone, 20% to 30% ethyl acetate, 12% to 16% isopropanol, 0.04% to 0.06% antioxidant, 0.04% to 0.06% isooctylphenyl polyoxyethylene ether, 0.02% to 0.08% sodium benzoate, 0.5% to 2% color powder and 0.1% to 1% essence.

[0007] In the above technical scheme, the present application achieves good insulation and good bonding strength of the insulating layer spray through a specific raw material ratio and the synergistic effect between the raw materials. Among them, polyvinyl chloride is used as the main film-forming substance. The molecules of polyvinyl chloride contain a large number of chlorine atoms. These chlorine atoms can interact with each other to form chemical bonds, thereby forming a three-dimensional network structure, which effectively blocks the flow of electrons, thereby improving the insulation of the insulating layer; the addition of natural rubber gives the insulating layer better insulation and flexibility, because the molecular structure of natural rubber contains a large number of carbon-hydrogen bonds, which further improve the electrical insulation performance of the insulating layer. At the same time, natural rubber can be inserted between the molecules of polyvinyl chloride, increase the distance between the molecular chains, thereby reducing the force between the molecular chains, improving the flexibility of the insulating layer, and reducing the possible cracks and fractures of the insulating layer during the continuous bending process; the addition of chloroacetic acid resin further enhances the bonding strength and durability of the insulating layer, because chloroacetic acid resin can form hydrogen bonds or dipole interactions with the molecular chains of polyvinyl chloride and natural rubber, thereby improving the adhesion and aging resistance of the entire insulating layer. At the same time, chlorine The addition of vinegar resin can also improve the chemical corrosion resistance of the insulating layer, so that it can maintain a good insulating effect when facing various environmental factors such as humidity, acidic and alkaline substances; cyclohexanone, ethyl acetate and isopropyl alcohol are all organic solvents, and their combination can dissolve the raw materials of the compound solution very well, so that the compound solution has good fluidity and is easy to construct. At the same time, all three have a low boiling point and can evaporate quickly, so that the insulating layer can be dried in a short time, thereby improving construction efficiency; antioxidants and isooctylphenyl polyoxyethylene ether as functional additives can further improve the stability, aging resistance and bonding strength of the insulating layer. Antioxidants can effectively inhibit the oxidative decomposition and deterioration of materials during use, while isooctylphenyl polyoxyethylene ether as a dispersant can not only help stabilize other components in the compound solution to prevent stratification or precipitation during storage and use, but also promote the formation of a good interface between the insulating layer and the substrate, thereby effectively improving the bonding strength of the insulating layer.

[0008] Preferably, the compound solution comprises the following raw materials in percentage by mass: 20% polyvinyl chloride, 5% natural rubber, 2% chloroacetic resin, 30% cyclohexanone, 25.85% ethyl acetate, 15% isopropanol, 0.05% antioxidant, 0.05% isooctylphenyl polyoxyethylene ether, 0.05% sodium benzoate, 1% color powder and 0.5% flavor.

[0009] In the above technical solution, the present application further improves the good insulation and good bonding strength of the insulating layer spray by further optimizing the dosage of each raw material of the compound solution.

[0010] Preferably, the compound solution further comprises 0.5% to 1% toluene diphenyl phosphate.

[0011] In the above technical scheme, the present application further enhances the flame retardancy and thermal stability of the insulating layer by further adding toluene diphenyl phosphate to the compound solution. At the same time, the present application has found in the study that by further adding toluene diphenyl phosphate to the compound solution and blending toluene diphenyl phosphate with other raw materials, the compound solution can form an interface structure that is beneficial to the bonding strength, thereby further improving the bonding strength of the insulating layer.

[0012] Preferably, the propellant is liquefied petroleum gas.

[0013] In the above technical solution, liquefied petroleum gas is used as a propellant, which has good spraying performance and safety.

[0014] Preferably, the volume ratio of the compound solution to the propellant is 5:1.

[0015] In the above technical solution, by determining the volume ratio of the compound solution and the propellant to be 5:1, it can be ensured that the spray has a good spraying effect and a suitable spraying amount when used, thereby ensuring uniform coverage of the insulating layer.

[0016] In the second aspect, the present application provides a method for preparing an aerosol-type insulating layer spray using the following technical solution: A method for preparing an aerosol type insulating layer spray comprises the following steps: Step 1: Mix cyclohexanone, ethyl acetate and isopropanol and stir well; Step 2: Heat the material obtained in step 1 to 75-85°C, add polyvinyl chloride, natural rubber and chloroacetic acid resin, and stir until completely dissolved; Step 3: Add color powder and isooctylphenyl polyoxyethylene ether to the material obtained in step 2 under stirring, and stir until the mixture is uniform; Step 4: Under stirring, add the remaining raw materials for preparing the composite solution to the material obtained in step 3, and stir until the mixture is uniform to obtain a composite solution; Step 5: Fill the compound solution, seal it and then add the propellant to obtain an aerosol type insulating layer spray.

[0017] In the above technical solution, the present application not only ensures the uniformity and stability of the insulating layer spray through the above preparation method, but also is easy to operate and suitable for large-scale production.

[0018] Preferably, the stirring speed in step 2 is 2500-3000 r / min.

[0019] Preferably, the stirring speed of step 3 is 1000-1500 r / min, and the stirring speed of step 4 is 1000-1500 r / min.

[0020] In the above technical scheme, during the preparation process, the present application ensures that polyvinyl chloride, natural rubber and chloroacetic acid resin can be fully dissolved by adjusting the stirring speed of step 2 to 2500-3000 r / min; and avoids the generation of excessive bubbles due to excessive stirring, which affects the quality of the aerosol insulating layer spray, by adjusting the stirring speed of steps 3 and 4 to 1000-1500 r / min.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application uses polyvinyl chloride, natural rubber and chloroacetic acid resin as the main ingredients, and the three work together to achieve good insulation, flexibility and aging resistance of the insulation layer spray. The high insulation of polyvinyl chloride ensures the safe operation of wires and cables, the addition of natural rubber provides better flexibility and reduces the damage to the insulation layer caused by physical stress, and the addition of chloroacetic acid resin further enhances the adhesion between the insulation layer and the cable surface, ensuring the durability and durability of the insulation layer.

[0022] 2. This application uses cyclohexanone, ethyl acetate and isopropanol as organic solvents. Their combination not only makes the compound solution have good fluidity and is easy to construct, but all three have low boiling points and can evaporate quickly, so that the insulating layer can be dried in a short time, thereby improving construction efficiency.

[0023] 3. The present application can further improve the stability, aging resistance and bonding strength of the insulating layer by using antioxidants and isooctylphenyl polyoxyethylene ether as functional additives.

[0024] 4. The present application further enhances the flame retardancy, thermal stability and bonding strength of the insulating layer by using toluene diphenyl phosphate. DETAILED DESCRIPTION

[0025] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0026] Example 1 An aerosol type insulating layer spray consists of a compound solution and a propellant, wherein the volume ratio of the compound solution to the propellant is 5:1.

[0027] The compound solution includes the following raw materials: 20kg polyvinyl chloride, 5kg natural rubber, 2kg chloroacetic acid resin, 30kg cyclohexanone, 25.85kg ethyl acetate, 15kg isopropyl alcohol, 0.5kg toluene diphenyl phosphate, 0.05kg antioxidant, 0.05kg isooctylphenyl polyoxyethylene ether, 0.05kg sodium benzoate, 1kg color powder and 0.5kg flavor.

[0028] Among them, the polyvinyl chloride is injection molding grade polyvinyl chloride DG-1000K from Tianjin Dagu.

[0029] Among them, the natural rubber is natural rubber No. 2 produced by Guangxi Wusen New Materials Technology Co., Ltd.

[0030] Among them, the chloroacetic acid rubber is the carboxyl-modified ternary chloroacetic acid VAM produced by Hubei Watson Chemical Technology Co., Ltd.

[0031] Among them, toluene diphenyl phosphate is the industrial grade toluene diphenyl phosphate of Jinan Yuyi Chemical Co., Ltd.

[0032] Wherein, the antioxidant is BHT antioxidant.

[0033] Among them, isooctylphenyl polyoxyethylene ether is Triton X-100 produced by Guangzhou Zouyang Chemical Co., Ltd.

[0034] The preparation method of the aerosol type insulating layer spray comprises the following steps: Step 1: Mix cyclohexanone, ethyl acetate and isopropanol and stir well.

[0035] Step 2: Heat the material obtained in step 1 to 75-85°C, add polyvinyl chloride, natural rubber and chloroacetic acid resin, and stir at a speed of 2500-3000 r / min until completely dissolved.

[0036] Step 3: Add color powder and isooctylphenyl polyoxyethylene ether to the material obtained in step 2 under stirring at a speed of 1000-1500 r / min, and stir until the mixture is uniform.

[0037] Step 4: under stirring at a speed of 1000-1500 r / min, add the remaining raw materials for preparing the composite solution to the material obtained in step 3, and stir until the mixture is uniform to obtain a composite solution.

[0038] Step 5: Fill the compound solution, seal it and then add the propellant to obtain an aerosol type insulating layer spray.

[0039] Example 2 An aerosol type insulating layer spray, which is different from Example 1 in that it is composed of a compound solution and a propellant, and the volume ratio of the compound solution to the propellant is 5:1.

[0040] The compound solution includes the following raw materials: 18kg polyvinyl chloride, 6kg natural rubber, 1kg chloroacetic resin, 35kg cyclohexanone, 23.88kg ethyl acetate, 12kg isopropyl alcohol, 1kg toluene diphenyl phosphate, 0.06kg antioxidant, 0.04kg isooctylphenyl polyoxyethylene ether, 0.02kg sodium benzoate, 2kg color powder and 1kg flavor.

[0041] The preparation method of the aerosol type insulating layer spray comprises the following steps: Step 1: Mix cyclohexanone, ethyl acetate and isopropanol and stir well.

[0042] Step 2: Heat the material obtained in step 1 to 75-85°C, add polyvinyl chloride, natural rubber and chloroacetic acid resin, and stir at a speed of 2500-3000 r / min until completely dissolved.

[0043] Step 3: Add color powder and isooctylphenyl polyoxyethylene ether to the material obtained in step 2 under stirring at a speed of 1000-1500 r / min, and stir until the mixture is uniform.

[0044] Step 4: under stirring at a speed of 1000-1500 r / min, add the remaining raw materials for preparing the composite solution to the material obtained in step 3, and stir until the mixture is uniform to obtain a composite solution.

[0045] Step 5: Fill the compound solution, seal it and then add the propellant to obtain an aerosol type insulating layer spray.

[0046] Example 3 An aerosol type insulating layer spray, which is different from Example 1 in that it is composed of a compound solution and a propellant, and the volume ratio of the compound solution to the propellant is 5:1.

[0047] The compound solution includes the following raw materials: 25kg polyvinyl chloride, 3kg natural rubber, 3kg chloroacetic acid resin, 30kg cyclohexanone, 21.42kg ethyl acetate, 16kg isopropyl alcohol, 0.8kg toluene diphenyl phosphate, 0.04kg antioxidant, 0.06kg isooctylphenyl polyoxyethylene ether, 0.08kg sodium benzoate, 0.5kg color powder and 0.1kg flavor.

[0048] The preparation method of the aerosol type insulating layer spray comprises the following steps: Step 1: Mix cyclohexanone, ethyl acetate and isopropanol and stir well.

[0049] Step 2: Heat the material obtained in step 1 to 75-85°C, add polyvinyl chloride, natural rubber and chloroacetic acid resin, and stir at a speed of 2500-3000 r / min until completely dissolved.

[0050] Step 3: Add color powder and isooctylphenyl polyoxyethylene ether to the material obtained in step 2 under stirring at a speed of 1000-1500 r / min, and stir until the mixture is uniform.

[0051] Step 4: under stirring at a speed of 1000-1500 r / min, add the remaining raw materials for preparing the composite solution to the material obtained in step 3, and stir until the mixture is uniform to obtain a composite solution.

[0052] Step 5: Fill the compound solution, seal it and then add the propellant to obtain an aerosol type insulating layer spray.

[0053] Example 4 An aerosol type insulating layer spray, which is different from Example 1 in that toluene diphenyl phosphate in the compound solution is replaced by tri(xylene) phosphate in an equal amount.

[0054] Among them, trixylene phosphate is the flame retardant TXP of Guangzhou Shanghe Chemical Technology Co., Ltd.

[0055] Example 5 An aerosol type insulating layer spray, which is different from Example 1 in that toluene diphenyl phosphate in the compound solution is replaced by ethyl acetate in equal amounts.

[0056] Comparative Example 1 An aerosol type insulating layer spray, which is different from Example 1 in that an equal amount of natural rubber is replaced by polyvinyl chloride.

[0057] Comparative Example 2 An aerosol type insulating layer spray, which is different from Example 1 in that chlorovinyl resin is replaced by polyvinyl chloride in equal amounts.

[0058] Comparative Example 3 An aerosol type insulating layer spray, which is different from Example 1 in that isooctylphenyl polyoxyethylene ether is replaced by octadecylamine polyoxyethylene ether in equal amounts.

[0059] Among them, the octadecylamine polyoxyethylene ether is octadecylamine polyoxyethylene ether AC-1802 produced by Zhejiang Jinguang Industrial Co., Ltd.

[0060] Performance Testing In order to verify the performance of the aerosol type insulation layer spray of the present application, the following experiments were conducted: Experiment 1: Insulation performance test With reference to GB / T1410-2006 "Test Method for Volume Resistivity and Surface Resistivity of Materials", an HT-type digital megohmmeter was used to take a wire insulation sheath made of polyvinyl chloride, and an equal amount of the aerosol type insulation layer spray of the above-mentioned embodiments and comparative examples was evenly sprayed on its surface. After drying, the insulation layer formed by the aerosol type insulation layer spray was cut into a suitable volume size for testing.

[0061] Experiment 2: Shear Strength Test With reference to GB / T7124-2008 "Determination of tensile shear strength of adhesives", take a wire insulation sleeve made of polyvinyl chloride, spray an equal amount of the aerosol type insulation layer spray of the above embodiments and comparative examples evenly on its surface, and after drying, use a universal material testing machine to perform a shear strength test.

[0062] Experiment 3: Peel Strength Test Referring to GB / T2791-1995 "Adhesive Peel Strength Test Method", take a wire insulation sleeve made of polyvinyl chloride, spray an equal amount of the aerosol type insulation layer spray of the above embodiments and comparative examples evenly on its surface, and after drying, use a peeling tester to perform a peeling strength test.

[0063] The above test results are shown in Table 1.

[0064] Table 1: Group Volume resistivity (Ω·m) Shear strength(MPa) Peel strength (N / mm) Example 1 <![CDATA[2.7*10 13 ]]> 15.2 3.15 Example 2 <![CDATA[2.5*10 13 ]]> 14.9 3.08 Example 3 <![CDATA[2.8*10 13 ]]> 15.4 3.11 Example 4 <![CDATA[2.6*10 13 ]]> 14.3 3.04 Example 5 <![CDATA[2.5*10 13 ]]> 14.1 3.02 Comparative Example 1 <![CDATA[2.1*10 13 ]]> 13.2 2.83 Comparative Example 2 <![CDATA[1.8*10 13 ]]> 13.5 2.79 Comparative Example 3 <![CDATA[2.6*10 13 ]]> 13.8 2.86 Combining the analysis of the test results of Examples 1 to 5, Comparative Examples 1 to 3 and Table 1, it can be seen that the aerosol-type insulating layer sprays of Examples 1 to 5 perform well in terms of insulation performance, shear strength and peel strength, that is, the aerosol-type insulating layer sprays prepared in the present application have good insulation and bonding strength.

[0065] Specifically, in combination with Example 1 and Comparative Examples 1 and 2, Comparative Examples 1 and 2 respectively replace natural rubber and chloroacetic acid resin with polyvinyl chloride, and Example 1 shows good insulation and bonding strength. This shows that the use of natural rubber and chloroacetic acid resin in the present application is crucial to maintaining the comprehensive performance of the insulating layer. The applicant analyzes and believes that this is because the addition of natural rubber and chloroacetic acid resin, and their chemical properties complement each other with polyvinyl chloride, act together on the insulating layer, thereby enhancing the overall performance of the insulating layer, especially enhancing the bonding strength of the insulating layer.

[0066] Specifically, in Example 1 and Comparative Example 3, the isooctylphenyl polyoxyethylene ether was replaced with octadecylamine polyoxyethylene ether in Comparative Example 3, and Example 1 performed well in terms of insulation performance, shear strength and peel strength. This shows that isooctylphenyl polyoxyethylene ether helps to improve the interfacial bonding performance of the insulating layer, thereby enhancing the overall bonding strength of the insulating layer.

[0067] Specifically, in Example 1 and Example 4-Example 5, Example 4 and Example 5 respectively replaced toluene diphenyl phosphate with tris(xylene) phosphate and ethyl acetate, and Example 1 performed well in terms of insulation performance, shear strength and peel strength. This shows that toluene diphenyl phosphate in the aerosol type insulation layer spray of the present application not only enhances the flame retardant performance and thermal stability of the insulation layer, but also further improves the bonding strength of the insulation layer.

[0068] 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 modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An aerosol type insulating layer spray, characterized in that: The invention comprises a compound solution and a propellant, wherein the compound solution comprises the following raw materials in percentage by weight: 18%~25% polyvinyl chloride, 3%~6% natural rubber, 1%~3% chloroacetic resin, 30%~35% cyclohexanone, 20%~30% ethyl acetate, 12%~16% isopropyl alcohol, 0.04%~0.06% antioxidant, 0.04%~0.06% isooctylphenyl polyoxyethylene ether, 0.02%~0.08% sodium benzoate, 0.5%~2% color powder and 0.1%~1% flavor.

2. The aerosol type insulating layer spray according to claim 1, characterized in that: The composite solution comprises the following raw materials in percentage by mass: 20% polyvinyl chloride, 5% natural rubber, 2% chloroacetic resin, 30% cyclohexanone, 25.85% ethyl acetate, 15% isopropanol, 0.05% antioxidant, 0.05% isooctylphenyl polyoxyethylene ether, 0.05% sodium benzoate, 1% color powder and 0.5% flavor.

3. The aerosol type insulating layer spray according to claim 1, characterized in that: The composite solution also includes 0.5% to 1% toluene diphenyl phosphate.

4. The aerosol type insulating layer spray according to claim 1, characterized in that: The propellant is liquefied petroleum gas.

5. The aerosol type insulating layer spray according to claim 1, characterized in that: The volume ratio of the compound solution to the propellant is 5:

1.

6. A method for preparing an aerosol type insulating layer spray according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Mix cyclohexanone, ethyl acetate and isopropanol and stir well; Step 2: Heat the material obtained in step 1 to 75-85°C, add polyvinyl chloride, natural rubber and chloroacetic acid resin, and stir until completely dissolved; Step 3: Add color powder and isooctylphenyl polyoxyethylene ether to the material obtained in step 2 under stirring, and stir until the mixture is uniform; Step 4: Under stirring, add the remaining raw materials for preparing the composite solution to the material obtained in step 3, and stir until the mixture is uniform to obtain a composite solution; Step 5: Fill the compound solution, seal it and then add the propellant to obtain an aerosol type insulating layer spray.

7. The method for preparing an aerosol type insulating layer spray according to claim 6, characterized in that: The stirring speed of step 2 is 2500-3000 r / min.

8. The method for preparing an aerosol type insulating layer spray according to claim 6, characterized in that: The stirring speed of step 3 is 1000-1500 r / min, and the stirring speed of step 4 is 1000-1500 r / min.