Heat-resistant composite cable material containing silicone rubber and preparation method thereof

Abstract

The invention discloses a heat-resistant composite cable material containing silicone rubber, and belongs to the field of cable preparation, and the heat-resistant composite cable material is prepared from the following components by mass: 60-90 parts of low density polyethylene; 25 to 40 parts of polyimide resin; 20 to 30 parts of methyl vinyl silicone rubber; 2 to 3 parts of benzoyl peroxide; 4 to 8 parts of antimony trioxide; 3-5 parts of an antioxidant; 1-2 parts of a lubricant; 0.5 to 1 part of an accelerant; and 15 to 25 parts of tetrahydrofuran. According to the cable material, the adopted methyl vinyl silicone rubber has good heat resistance, and the whole cable material can be better protected due to the hydrophobicity and the electrical insulating property of the methyl vinyl silicone rubber; secondly, the novel preparation method is adopted in the cable material, antimony trioxide is added and mixed in the final step, formed particles or the surfaces of the particles contain antimony trioxide layers, and a further fire-resistant protection effect is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of cable preparation, and specifically relates to a heat-resistant composite cable material containing silicone rubber and a preparation method thereof. Background Art

[0002] Ordinary people often mistake wires and cables for the same thing. In fact, a wire refers to a conductor for transmitting electrical energy, which is specifically divided into bare wires, electromagnetic wires, and insulated wires. The difference between bare wires and insulated wires is that bare wires do not have an insulating layer. For example, overhead stranded wires, profiles, etc. are mainly used for outdoor overhead lines or indoor busbars; while insulated wires have a certain insulating layer, and these insulating layers should have certain heat-resistant, cold-resistant, moisture-proof, corrosion-resistant and other properties. Different insulating cable materials can be selected to obtain different characteristics.

[0003] For a cable, it is an insulated wire composed of one or more mutually insulated conductive cores placed in a sealed sheath. A protective covering layer can be added outside it for transmitting and distributing electrical energy or transmitting electrical signals. With the development of the times, the cable materials on the market currently already have certain heat-resistant properties. However, the composite cable materials for dealing with extreme weather and changing temperature environments have become a difficult problem for those skilled in the art. Because in extreme weather and changing temperature environments, the electrical materials are required to have better elasticity and plasticity. Although some multi-component compounds have been added to the cable materials, the fundamental technical defects have not actually been solved. Therefore, the heat-resistant composite cable material containing silicone rubber and its preparation method of the present invention have emerged as the times require. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention discloses a heat-resistant composite cable material containing silicone rubber and a preparation method thereof. First, in the present invention, methyl vinyl silicone rubber is used, which has good heat-resistant properties, and its self-owned hydrophobicity and electrical insulation can better protect the whole cable material; secondly, a new preparation method is adopted in the cable material of the present invention, and antimony trioxide is added in the final step for mixing, and the formed particles contain or have an antimony trioxide layer on the surface, which plays a further fire-resistant protection effect.

[0005] The present invention is realized as follows:

[0006] A heat-resistant composite cable material containing silicone rubber, calculated by mass, the heat-resistant composite cable material is prepared from the following components:

[0007] Low-density polyethylene: 60 - 90 parts;

[0008] Polyimide resin: 25 - 40 parts;

[0009] Methyl vinyl silicone rubber: 20 - 30 parts;

[0010] Benzoyl peroxide: 2 - 3 parts;

[0011] Antimony trioxide: 4 - 8 parts;

[0012] Antioxidant: 3 - 5 parts;

[0013] Lubricant: 1 - 2 parts;

[0014] Accelerator: 0.5 - 1 part;

[0015] Tetrahydrofuran: 15 - 25 parts.

[0016] Furthermore, the lubricant is polyethylene wax.

[0017] Furthermore, the antioxidant is a polyurethane antioxidant.

[0018] Furthermore, by mass parts, the mass part ratio between the low - density polyethylene and the methyl vinyl silicone rubber is 3:1.

[0019] Furthermore, by mass parts, the mass part ratio between the methyl vinyl silicone rubber and benzoyl peroxide is 10:1.

[0020] The present invention also discloses a preparation method of a heat - resistant composite cable material containing silicone rubber, which is characterized in that the method is as follows:

[0021] Step 1: Weigh the following components according to the mass part ratio: 60 - 90 parts of low - density polyethylene, 20 - 30 parts of methyl vinyl silicone rubber, 2 - 3 parts of benzoyl peroxide. The mass part ratio between the low - density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass part ratio between the methyl vinyl silicone rubber and benzoyl peroxide is 10:1. After accurately weighing the above substances, carry out mixing for 1 - 1.5 hours;

[0022] Step 2: Put 25 - 40 parts of polyimide resin, 3 - 5 parts of antioxidant, 1 - 2 parts of lubricant, 0.5 - 1 part of accelerator, 15 - 25 parts of tetrahydrofuran into the mixture in Step 1, and continue to stir until it is uniform;

[0023] Step 3: Transfer the mixture in Step 3 to an open mill, add 4 - 8 parts of antimony trioxide and mix evenly, and then carry out drying treatment and extrusion granulation.

[0024] Furthermore, the mixing parameters are: temperature: 60 - 80°C.

[0025] Furthermore, the stirring parameters in Step 2 are: temperature: 45 - 50°C; rotation speed: 60 - 70 rpm.

[0026] The beneficial effects of the present invention compared with the prior art are as follows:

[0027] The composite cable material prepared by the present invention has good thermal stability and good performance in high-temperature, low-temperature, and even corrosive environments; methyl vinyl silicone rubber has good heat resistance, and its inherent hydrophobicity and electrical insulation can better protect the overall cable material. At the same time, due to the introduction of silicone rubber active end groups, the prepared cable material has good physical and mechanical properties. In addition, through the interaction between benzoyl peroxide and methyl vinyl silicone rubber, the cable material can form a network structure, enhancing the plasticity and elasticity of the prepared cable material and expanding the application range of the cable material. Detailed implementation mode

[0028] To make the purpose, technical solution and effects of the present invention clearer and more definite, the following examples are listed to further illustrate the present invention in detail. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0029] Example 1

[0030] A preparation method of a heat-resistant composite cable material containing silicone rubber in this embodiment is characterized in that the method is as follows:

[0031] Step 1: Weigh the following components according to the mass ratio: 78 parts of low-density polyethylene, 26 parts of methyl vinyl silicone rubber, and 2.6 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, conduct mixing for 1 to 1.5 hours; the mixing parameters are: temperature: 60 - 80 °C.

[0032] Step 2: Put 37 parts of polyimide resin, 4 parts of antioxidant, 1 part of lubricant, 0.7 part of accelerator, and 23 parts of tetrahydrofuran into the mixture in Step 1, and continue to stir until uniform; the lubricant is polyethylene wax; the antioxidant uses polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0033] Step 3: Transfer the mixture in Step 3 to an open mill, add 6 parts of antimony trioxide and mix evenly, and then conduct drying treatment and extrusion granulation.

[0034] Example 2

[0035] A preparation method of a heat-resistant composite cable material containing silicone rubber in this embodiment is characterized in that the method is as follows:

[0036] Step 1: Weigh the following components according to the parts by mass ratio: 90 parts of low-density polyethylene, 30 parts of methyl vinyl silicone rubber, and 3 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, conduct mixing for 1 to 1.5 hours; the mixing parameters are: temperature: 60 - 80 °C.

[0037] Step 2: Place 40 parts of polyimide resin, 5 parts of antioxidant, 2 parts of lubricant, 1 part of accelerator, and 25 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue stirring until it is uniform; the lubricant is polyethylene wax; the antioxidant uses polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0038] Step 3: Transfer the mixture obtained in Step 3 to an open mill, add 8 parts of antimony trioxide, mix evenly, and then conduct drying treatment and extrusion granulation.

[0039] Example 3

[0040] The preparation method of a heat-resistant composite cable material containing silicone rubber in this example is characterized in that the method is as follows:

[0041] Step 1: Weigh the following components according to the parts by mass ratio: 60 parts of low-density polyethylene, 20 parts of methyl vinyl silicone rubber, and 2 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, conduct mixing for 1 to 1.5 hours; the mixing parameters are: temperature: 60 - 80 °C.

[0042] Step 2: Place 25 parts of polyimide resin, 3 parts of antioxidant, 1 part of lubricant, 0.5 part of accelerator, and 15 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue stirring until it is uniform; the lubricant is polyethylene wax; the antioxidant uses polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0043] Step 3: Transfer the mixture obtained in Step 3 to an open mill, add 4 parts of antimony trioxide, mix evenly, and then conduct drying treatment and extrusion granulation.

[0044] Example 4

[0045] The preparation method of a heat-resistant composite cable material containing silicone rubber in this example is characterized in that the method is as follows:

[0046] Step 1: Weigh the following components according to the parts by mass ratio: 69 parts of low-density polyethylene, 23 parts of methyl vinyl silicone rubber, and 2.3 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, conduct mixing for 1 - 1.5 hours. The mixing parameters are: temperature: 60 - 80 °C.

[0047] Step 2: Place 28 parts of polyimide resin, 5 parts of antioxidant, 2 parts of lubricant, 0.7 part of accelerator, and 18 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue stirring until uniform. The lubricant is polyethylene wax; the antioxidant uses polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0048] Step 3: Transfer the mixture obtained in Step 3 to an open mill, add 6 parts of antimony trioxide, mix evenly, and then conduct drying treatment and extrusion granulation.

[0049] Example 5

[0050] A preparation method of a heat-resistant composite cable material containing silicone rubber in this example is characterized in that the method is as follows:

[0051] Step 1: Weigh the following components according to the parts by mass ratio: 81 parts of low-density polyethylene, 27 parts of methyl vinyl silicone rubber, and 2.7 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, conduct mixing for 1 - 1.5 hours. The mixing parameters are: temperature: 60 - 80 °C.

[0052] Step 2: Place 30 parts of polyimide resin, 4 parts of antioxidant, 1.6 parts of lubricant, 0.7 part of accelerator, and 21 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue stirring until uniform. The lubricant is polyethylene wax; the antioxidant uses polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0053] Step 3: Transfer the mixture obtained in Step 3 to an open mill, add 5 parts of antimony trioxide, mix evenly, and then conduct drying treatment and extrusion granulation.

[0054] Example 6

[0055] A preparation method of a heat-resistant composite cable material containing silicone rubber according to this embodiment is characterized in that the method is as follows:

[0056] Step 1: Weigh the following components according to the mass ratio: 84 parts of low-density polyethylene, 28 parts of methyl vinyl silicone rubber, and 2.8 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, carry out mixing for 1 - 1.5 hours; the mixing parameters are: temperature: 60 - 80 °C.

[0057] Step 2: Put 35 parts of polyimide resin, 4 parts of antioxidant, 1 part of lubricant, 0.6 part of accelerator, and 22 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue to stir until uniform; the lubricant is polyethylene wax; the antioxidant is a polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0058] Step 3: Transfer the mixture obtained in Step 3 to a two-roll mill, add 5 parts of antimony trioxide and mix evenly, and then carry out drying treatment and extrusion granulation.

[0059] Example 7

[0060] A preparation method of a heat-resistant composite cable material containing silicone rubber according to this embodiment is characterized in that the method is as follows:

[0061] Step 1: Weigh the following components according to the mass ratio: 87 parts of low-density polyethylene, 29 parts of methyl vinyl silicone rubber, and 2.9 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and the benzoyl peroxide is 10:1. After accurately weighing the above substances, carry out mixing for 1 - 1.5 hours; the mixing parameters are: temperature: 60 - 80 °C.

[0062] Step 2: Put 30 parts of polyimide resin, 5 parts of antioxidant, 2 parts of lubricant, 0.5 part of accelerator, and 17 parts of tetrahydrofuran into the mixture obtained in Step 1, and continue to stir until uniform; the lubricant is polyethylene wax; the antioxidant is a polyurethane antioxidant. The stirring parameters in Step 2 are: temperature: 45 - 50 °C; rotation speed: 60 - 70 rpm.

[0063] Step 3: Transfer the mixture obtained in Step 3 to a two-roll mill, add 7 parts of antimony trioxide and mix evenly, and then carry out drying treatment and extrusion granulation.

[0064] The composite cable material prepared in the above embodiments was subjected to performance tests, and the results are shown in Table 1 below:

[0065] Table 1

[0066] Flame retardant grade Tensile strength (MPa) Elongation at break (%) Example 1 V-0 8.29 500 Example 2 V-0 8.06 496 Example 3 V-0 8.24 505 Example 4 V-0 8.17 503 Example 5 V-0 8.05 487 Example 6 V-0 8.12 490 Example 7 V-0 8.24 500

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A heat-resistant composite cable material containing silicone rubber. By mass, the heat-resistant composite cable material is prepared from the following components: Low-density polyethylene: 60 - 90 parts; Polyimide resin: 25 - 40 parts; Methyl vinyl silicone rubber: 20 - 30 parts; Benzoyl peroxide: 2 - 3 parts; Antimony trioxide: 4 - 8 parts; Antioxidant: 3 - 5 parts; Lubricant: 1 - 2 parts; Accelerator: 0.5 - 1 part; Tetrahydrofuran: 15 - 25 parts.

2. The heat-resistant composite cable material containing silicone rubber according to claim 1, wherein The lubricant is polyethylene wax.

3. The heat-resistant composite cable material containing silicone rubber according to claim 1, characterized in that, The antioxidant is a polyurethane antioxidant.

4. The heat-resistant composite cable material containing silicone rubber according to claim 1, characterized in that, By mass, the mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:

1.

5. The heat-resistant composite cable material containing silicone rubber according to claim 1, characterized in that By mass, the mass ratio between the methyl vinyl silicone rubber and benzoyl peroxide is 10:

1.

6. The preparation method of a heat-resistant composite cable material containing silicone rubber according to any one of claims 1 to 5, characterized in that, The method is as follows: Step 1: Weigh the following components according to the mass ratio: 60 - 90 parts of low-density polyethylene, 20 - 30 parts of methyl vinyl silicone rubber, 2 - 3 parts of benzoyl peroxide. The mass ratio between the low-density polyethylene and the methyl vinyl silicone rubber is 3:1; the mass ratio between the methyl vinyl silicone rubber and benzoyl peroxide is 10:

1. After accurately weighing the above substances, carry out mixing for 1 - 1.5 hours; Step 2: Put 25 - 40 parts of polyimide resin, 3 - 5 parts of antioxidant, 1 - 2 parts of lubricant, 0.5 - 1 part of accelerator, and 15 - 25 parts of tetrahydrofuran into the mixture in Step 1, and continue stirring until it is uniform; Step 3: Transfer the mixture in Step 3 to an open mill, add 4 - 8 parts of antimony trioxide and mix evenly, and then carry out drying treatment and extrusion granulation.

7. The preparation method of a heat-resistant composite cable material containing silicone rubber according to claim 6, characterized in that, The mixing parameters are: Temperature: 60 - 80 °C.

8. The preparation method of a heat-resistant composite cable material containing silicone rubber according to claim 6, characterized in that, The stirring parameters in Step 2 are: Temperature: 45 - 50 °C; Rotation speed: 60 - 70 rpm.