A high temperature resistant cable for aerospace and its preparation method and application

Abstract

The present invention relates to the field of cable technology, and proposes a high-temperature resistant cable for aerospace and a preparation method and application thereof. The high-temperature resistant cable for aerospace includes a conductor, an insulating layer, and a sheath layer from the inside to the outside; the raw materials of the insulating layer include the following components by weight: 100-120 parts of polytetrafluoroethylene, 10-20 parts of high-density polyethylene, 25-35 parts of ethylene-tetrafluoroethylene copolymer, 15-30 parts of ethylene-chlorotrifluoroethylene copolymer, 5-10 parts of cyanate resin modified inorganic filler, 3-5 parts of sensitizer, 1-3 parts of antioxidant, and 0.5-1 part of lubricant. Through the above technical solution, the problem of poor high temperature resistance of the insulation layer of the cable in the related art is solved.

Description

Technical Field

[0001] The present invention relates to the field of cable technology, and in particular to a high temperature resistant cable for aerospace and a preparation method and application thereof. Background Art

[0002] In the aerospace field, various types of equipment face extremely harsh environmental conditions, so stringent requirements are placed on the performance of cables. As a key connecting component, the high temperature resistance of aerospace cables is directly related to the safety and reliability of flight missions. In particular, although the insulation layer of existing aerospace cables has excellent insulation performance, it still has the problem of poor high temperature resistance. When the insulation layer is not resistant to high temperatures, the first thing it faces is the degradation of electrical performance. As the temperature rises beyond its tolerance threshold, the insulation resistance will drop significantly, resulting in an increased risk of leakage, which interferes with the power and signal transmission of key systems. Therefore, it is necessary to improve the high temperature resistance of the cable insulation layer and obtain a high temperature resistant cable for aerospace. Summary of the invention

[0003] The present invention provides a high temperature resistant cable for aerospace and a preparation method and application thereof, which solves the problem of poor high temperature resistance of the insulation layer of the cable in the related art.

[0004] The technical solution of the present invention is as follows:

[0005] The present invention provides a high temperature resistant cable for aerospace use, which comprises a conductor, an insulating layer and a sheath layer from the inside to the outside;

[0006] The raw materials of the insulating layer include the following components in parts by weight: 100-120 parts of polytetrafluoroethylene, 10-20 parts of high-density polyethylene, 25-35 parts of ethylene-tetrafluoroethylene copolymer, 15-30 parts of ethylene-chlorotrifluoroethylene copolymer, 5-10 parts of cyanate resin modified inorganic filler, 3-5 parts of sensitizer, 1-3 parts of antioxidant, and 0.5-1 part of lubricant.

[0007] As a further technical solution, the inorganic filler in the cyanate resin modified inorganic filler includes one or more of rectorite powder, talc powder, and montmorillonite.

[0008] As a further technical solution, the sensitizer includes an allyl radiation sensitizer;

[0009] The antioxidant includes one or more of antioxidant 1076, antioxidant 3114, antioxidant DSTP, and antioxidant BHT501;

[0010] The lubricant includes one or more of stearic acid, fluoro wax, paraffin wax and microcrystalline wax.

[0011] As a further technical solution, the raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 4-8 parts of cyanate resin, 2-4 parts of curing agent, 5-8 parts of diluent, 15-20 parts of dispersant, and 0.8-1.2 parts of surfactant.

[0012] As a further technical solution, the preparation method of the cyanate ester resin modified inorganic filler comprises the following steps: mixing and curing the raw materials of the cyanate ester resin modified inorganic filler to obtain the cyanate ester resin modified inorganic filler.

[0013] As a further technical solution, the curing agent includes an amine compound; the cyanate resin includes a bisphenol E-type cyanate resin; the surfactant includes one or two of sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the diluent includes one or more of acetone, ethylene dichloride, and dichloromethane; and the dispersant includes a stearate dispersant.

[0014] As a further technical solution, the mass ratio of the ethylene-tetrafluoroethylene copolymer to the ethylene-chlorotrifluoroethylene copolymer is 1:1-3.

[0015] In the present invention, the mass ratio of the components of the cable insulation layer, ethylene-tetrafluoroethylene copolymer and ethylene-chlorotrifluoroethylene copolymer, is adjusted to 1:1-3, thereby further improving the high temperature resistance of the cable insulation layer.

[0016] As a further technical solution, the melt index of the ethylene-chlorotrifluoroethylene copolymer at 275° C. and 2.16 kg is 2.0-4.0 g / 10 min.

[0017] In the present invention, ethylene-chlorotrifluoroethylene copolymer with a melting index of 2.0-4.0 g / 10 min at 275° C. and 2.16 kg is used as the raw material of the insulation layer, which further improves the high temperature resistance of the cable insulation layer.

[0018] The present invention also proposes a method for preparing a high temperature resistant cable for aerospace use, comprising the following steps:

[0019] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and radiation cross-linked to obtain the insulating layer, and then a sheath layer is extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0020] The present invention also proposes the application of the high-temperature resistant cable for aerospace or the high-temperature resistant cable prepared by the preparation method in aerospace.

[0021] The working principle and beneficial effects of the present invention are:

[0022] In the present invention, the high temperature resistant cable is provided with a conductor, an insulating layer and a sheath layer in sequence from the inside to the outside, wherein the raw materials of the insulating layer are polytetrafluoroethylene, high-density polyethylene, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer, inorganic filler and the like. By compounding ethylene-tetrafluoroethylene copolymer and ethylene-chlorotrifluoroethylene copolymer, and modifying the inorganic filler with cyanate resin and mixing it with the remaining components, the high temperature resistance of the cable insulating layer is significantly improved, and the strength of the cable insulating layer is also improved. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the following examples and comparative examples, the particle size of the rectorite powder is 800 mesh; the particle size of the montmorillonite is 800 mesh.

[0025] Example 1

[0026] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0027] The raw materials of the insulating layer include the following components in parts by weight: 100 parts of polytetrafluoroethylene (brand name PTFE G355), 10 parts of high-density polyethylene (model name 5010BP), 25 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 15 parts of ethylene-chlorotrifluoroethylene copolymer, 5 parts of inorganic filler, 3 parts of triallyl isocyanurate, 0.5 parts of antioxidant 1076, 0.5 parts of antioxidant BHT501, and 0.5 parts of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW);

[0028] The inorganic filler is rectorite powder and montmorillonite in a mass ratio of 2:3, and the inorganic filler is modified by cyanate resin;

[0029] The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 4 parts of cyanate resin, 2 parts of dicyandiamide, 5 parts of acetone, 15 parts of sodium stearate, and 0.8 parts of sodium lauryl sulfate;

[0030] The preparation method of the cyanate resin modified inorganic filler comprises the following steps: mixing the raw materials of the cyanate resin modified inorganic filler, and curing to obtain the cyanate resin modified inorganic filler; wherein the cyanate resin is bisphenol E type cyanate resin, which is purchased from Wuhan Woxuan Technology Co., Ltd.;

[0031] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0032] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0033] Example 2

[0034] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0035] The raw materials of the insulating layer include the following components in parts by weight: 120 parts of polytetrafluoroethylene (brand name PTFE G355), 20 parts of high-density polyethylene (model name 5010BP), 35 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 30 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 5 parts of triallyl isocyanurate, 3 parts of antioxidant DSTP, 0.5 parts of stearic acid, and 0.5 parts of paraffin; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW);

[0036] The inorganic filler is rectorite powder, and the inorganic filler is modified by cyanate resin;

[0037] The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 4 parts of cyanate resin, 2 parts of dicyandiamide, 5 parts of acetone, 15 parts of sodium stearate, and 0.8 parts of sodium lauryl sulfate;

[0038] The preparation method of the cyanate resin modified inorganic filler comprises the following steps: mixing the raw materials of the cyanate resin modified inorganic filler, and curing to obtain the cyanate resin modified inorganic filler; wherein the cyanate resin is bisphenol E type cyanate resin, which is purchased from Wuhan Woxuan Technology Co., Ltd.;

[0039] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0040] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0041] Example 3

[0042] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0043] The raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 25 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 17 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW);

[0044] The inorganic filler is rectorite powder, and the inorganic filler is modified by cyanate resin;

[0045] The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 8 parts of cyanate resin, 4 parts of dicyandiamide, 8 parts of acetone, 20 parts of sodium stearate, and 1.2 parts of sodium dodecyl sulfate;

[0046] The preparation method of cyanate resin modified inorganic filler comprises the following steps: mixing and curing the raw materials of cyanate resin modified inorganic filler to obtain cyanate resin modified inorganic filler; wherein the cyanate resin is bisphenol E type cyanate resin purchased from Wuhan Woxuan Technology Co., Ltd.

[0047] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0048] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0049] Example 4

[0050] The only difference between this embodiment and embodiment 3 is that the melt index of the ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16 kg is 1.0 g / 10 min (grade 901S).

[0051] Example 5

[0052] The only difference between this embodiment and embodiment 3 is that the melt index of the ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16 kg is 2.0 g / 10 min (the grade is 300DA).

[0053] Example 6

[0054] The only difference between this embodiment and embodiment 3 is that the melt index of the ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16 kg is 4.0 g / 10 min (brand number 350LC).

[0055] Example 7

[0056] The difference between this embodiment and embodiment 6 is that the raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 8.4 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 33.6 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.0g / 10min (brand name 350LC).

[0057] Example 8

[0058] The difference between this embodiment and embodiment 6 is that the raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 21 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 21 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.0g / 10min (brand name 350LC).

[0059] Example 9

[0060] The difference between this embodiment and embodiment 6 is that the raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 10.5 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 31.5 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.0g / 10min (brand name 350LC).

[0061] Comparative Example 1

[0062] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0063] The raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 42 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid;

[0064] The inorganic filler is rectorite powder, and the inorganic filler is modified by cyanate resin;

[0065] The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 8 parts of cyanate resin, 4 parts of dicyandiamide, 8 parts of acetone, 20 parts of sodium stearate, and 1.2 parts of sodium dodecyl sulfate;

[0066] The preparation method of cyanate resin modified inorganic filler comprises the following steps: mixing and curing the raw materials of cyanate resin modified inorganic filler to obtain cyanate resin modified inorganic filler; wherein the cyanate resin is bisphenol E type cyanate resin purchased from Wuhan Woxuan Technology Co., Ltd.

[0067] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0068] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0069] Comparative Example 2

[0070] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0071] The raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 42 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW);

[0072] The inorganic filler is rectorite powder, and the inorganic filler is modified by cyanate resin;

[0073] The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 8 parts of cyanate resin, 4 parts of dicyandiamide, 8 parts of acetone, 20 parts of sodium stearate, and 1.2 parts of sodium dodecyl sulfate;

[0074] The preparation method of cyanate resin modified inorganic filler comprises the following steps: mixing and curing the raw materials of cyanate resin modified inorganic filler to obtain cyanate resin modified inorganic filler; wherein the cyanate resin is bisphenol E type cyanate resin purchased from Wuhan Woxuan Technology Co., Ltd.

[0075] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0076] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0077] Comparative Example 3

[0078] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0079] The raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 25 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 17 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW); the inorganic filler is rectorite powder;

[0080] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0081] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0082] Comparative Example 4

[0083] High temperature resistant cables for aerospace use include conductor, insulation layer and sheath layer from the inside out;

[0084] The raw materials of the insulating layer include the following components in parts by weight: 110 parts of polytetrafluoroethylene (brand name PTFE G355), 15 parts of high-density polyethylene (model name 5010BP), 25 parts of ethylene-tetrafluoroethylene copolymer (brand name EP-521), 17 parts of ethylene-chlorotrifluoroethylene copolymer, 10 parts of inorganic filler, 4 parts of triallyl isocyanurate, 2 parts of antioxidant DSTP, and 1 part of stearic acid; the melt index of ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 4.5g / 10min (brand name 930LCW);

[0085] The inorganic filler is modified rectorite powder, and the preparation method of the modified rectorite powder comprises the following steps: dispersing 8 parts of the inorganic filler in 100 parts of N,N-dimethylformamide, adding 5 parts of octadecyl isocyanate and 0.2 parts of dibutyltin dilaurate, heating to 80°C, stirring and reacting for 3 hours, washing and drying to obtain the modified rectorite powder;

[0086] A method for preparing a high temperature resistant cable for aerospace use comprises the following steps:

[0087] The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and the insulating layer is obtained by radiation cross-linking. The sheath layer is then extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

[0088] The high temperature resistant cables prepared in Examples 1 to 9 and Comparative Examples 1 to 4 were respectively cut open along the central axis to take out the insulating layer according to the method in GB / T 2951.11-2008 "General test methods for insulation and sheath materials of cables and optical cables Part 11: General test methods for thickness and overall dimensions measurement mechanical properties test", and small dumbbell specimens with a thickness of 2 mm were made for high temperature resistance and strength tests: the tensile strength was tested according to GB / T1040.1-2018 "Determination of tensile properties of plastics Part 1: General Principles", the sample was placed at 100°C for 168h for high temperature treatment, the initial tensile strength of the sample before treatment and the tensile strength after treatment were tested respectively, and the tensile strength change rate was calculated, tensile strength change rate=[(initial tensile strength-tensile strength after treatment) / initial tensile strength]×100%; the results are shown in Table 1 below.

[0089] Table 1 Insulation layer performance test results

[0090]

[0091] Compared with Comparative Examples 1 to 4, the tensile strength change rate of the insulation layer of the high-temperature resistant cables prepared in Examples 1 to 9 is smaller and the initial tensile strength is higher, indicating that the raw materials of the insulation layer of the high-temperature resistant cable are compounded by adding ethylene-tetrafluoroethylene copolymer and ethylene-chlorotrifluoroethylene copolymer, and the inorganic filler is modified by cyanate resin and mixed with the remaining components, which significantly improves the high temperature resistance of the cable insulation layer and also improves the strength of the cable insulation layer.

[0092] Compared with Examples 3 and 4, the change rate of the tensile strength of the insulation layer of the high-temperature resistant cable prepared in Examples 5 and 6 is smaller, indicating that when the melt index of the ethylene-chlorotrifluoroethylene copolymer at 275°C and 2.16kg is 2.0-4.0g / 10min, the high temperature resistance of the cable insulation layer is further improved.

[0093] Compared with Examples 6 to 7, the change rate of the tensile strength of the insulation layer of the high-temperature resistant cables prepared in Examples 8 to 9 is smaller, indicating that when the mass ratio of the components of the cable insulation layer, ethylene-tetrafluoroethylene copolymer and ethylene-chlorotrifluoroethylene copolymer, is adjusted to 1:1 to 3, the high temperature resistance of the cable insulation layer is further improved.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant cable for aerospace, characterized in that: From the inside to the outside, it includes conductor, insulation layer and sheath layer; The raw materials of the insulating layer include the following components in parts by weight: 100-120 parts of polytetrafluoroethylene, 10-20 parts of high-density polyethylene, 25-35 parts of ethylene-tetrafluoroethylene copolymer, 15-30 parts of ethylene-chlorotrifluoroethylene copolymer, 5-10 parts of cyanate resin modified inorganic filler, 3-5 parts of sensitizer, 1-3 parts of antioxidant, and 0.5-1 parts of lubricant; The raw materials of the cyanate resin modified inorganic filler include the following components in parts by weight: 100 parts of inorganic filler, 4-8 parts of cyanate resin, 2-4 parts of curing agent, 5-8 parts of diluent, 15-20 parts of dispersant, and 0.8-1.2 parts of surfactant; The preparation method of the cyanate ester resin modified inorganic filler comprises the following steps: mixing and curing the raw materials of the cyanate ester resin modified inorganic filler to obtain the cyanate ester resin modified inorganic filler; The cyanate ester resin includes a bisphenol E type cyanate ester resin.

2. A high temperature resistant cable for aerospace use according to claim 1, characterized in that: The inorganic filler in the cyanate resin modified inorganic filler includes one or more of rectorite powder, talc powder and montmorillonite.

3. The high temperature resistant cable for aerospace use according to claim 1, characterized in that: The sensitizer includes an allyl radiation sensitizer; The antioxidant includes one or more of antioxidant 1076, antioxidant 3114, antioxidant DSTP, and antioxidant BHT501; The lubricant includes one or more of stearic acid, fluoro wax, paraffin wax and microcrystalline wax.

4. The high temperature resistant cable for aerospace use according to claim 1, characterized in that: The curing agent includes an amine compound; the surfactant includes one or two of sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the diluent includes one or more of acetone, ethylene dichloride, and dichloromethane; and the dispersant includes a stearate dispersant.

5. The high temperature resistant cable for aerospace use according to claim 1, characterized in that: The mass ratio of the ethylene-tetrafluoroethylene copolymer to the ethylene-chlorotrifluoroethylene copolymer is 1:1-3.

6. A high temperature resistant cable for aerospace use according to claim 5, characterized in that: The melt index of the ethylene-chlorotrifluoroethylene copolymer at 275° C. and 2.16 kg is 2.0-4.0 g / 10 min.

7. The method for preparing a high temperature resistant cable for aerospace use according to any one of claims 1 to 6, characterized in that: The following steps are involved: The raw materials of the insulating layer are mixed, extruded and coated on the outside of the conductor, and radiation cross-linked to obtain the insulating layer, and then a sheath layer is extruded on the surface of the insulating layer to obtain a high temperature resistant cable.

8. Use of the high temperature resistant cable for aerospace according to any one of claims 1 to 6 or the high temperature resistant cable prepared by the preparation method according to claim 7 in aerospace.

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