A heat-resistant and solder slag-proof cable sheath material

Abstract

The present invention relates to a high-temperature resistant and welding slag-proof cable sheath material, belonging to the technical field of sheath material preparation. The sheath material comprises the following raw materials in parts by weight: 80-100 parts of TPU, 20-40 parts of modified montmorillonite, 18-35 parts of crosslinked resin, 0.1-1.5 parts of processing auxiliary agent, 2-6 parts of co-crosslinking agent, and 0.1-0.5 part of reactive catalyst; the crosslinked resin is prepared by mixing and reacting hexamethylene diisocyanate trimer and alcohol hydroxyl double-terminated silicone oil in a molar ratio of 1-1.5:1 in a first organic solvent under an organotin catalyst. By introducing modified montmorillonite, crosslinked resin and co-crosslinking agent, an interpenetrating network is formed in the composite material. Through the triple high-temperature resistance modification of the high-temperature resistance of montmorillonite, the high-temperature resistance of the silane chain and the high-temperature resistance of the interpenetrating crosslinked network, the obtained composite material can synergistically resist the temperature of the welding slag point, so that the surface of the material does not melt.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheath material preparation, and specifically relates to a high-temperature resistant and welding slag-proof cable sheath material. Background Art

[0002] The raw materials of existing sheath materials include polyvinyl chloride (PVC) resins, polyethylene (PE) resins, polyurethane (PUR) resins, thermoplastic elastomers (TPE or TPR) resins, thermoplastic polyurethane (TPU) resins, and other special types. Each of the above sheath materials has its own advantages and disadvantages. Among them, PVC sheath materials contain halogens, and their combustion is prone to produce hydrogen halide smoke, and the hydrogen halide smoke destroys the ecological environment. PE sheath materials are not high-temperature resistant and are prone to aging in the sun, but have low production costs and are environmentally friendly. PUR sheath materials have good oil resistance, toughness, wear resistance, cold resistance, water resistance, aging resistance and other properties, but have relatively high production costs. TPE / TPR sheath materials also have good chemical resistance and oil resistance, as well as excellent flexibility and wear resistance, but are poor in high-temperature resistance and firmness. TPU sheath materials have excellent properties of high wear resistance, high tension, high tensile strength, toughness and aging resistance, but are poor in firmness and prone to deformation. Generally, PVC, PUR, TPU or special type raw materials with better temperature resistance are generally selected for welding slag-proof cable sheath materials. However, based on environmental protection and production costs, TPU resins are selected as the raw materials for welding slag-proof cable sheath materials in the present invention. However, based on the extremely high temperature of the welding slag point (above 200 °C), in order to prevent the welding slag point from scalding the surface of the sheath material, the TPU sheath material also needs to be modified for high-temperature resistance. At the same time, it is also necessary to overcome the disadvantages of poor firmness and easy deformation of TPU resins. Summary of the Invention

[0003] In view of the above problems, the present invention provides a high-temperature resistant and welding slag-proof cable sheath material.

[0004] The object of the present invention can be achieved by the following technical solutions:

[0005] A high-temperature resistant and welding slag-proof cable sheath material, comprising the following raw materials in parts by weight: 80-100 parts of TPU, 16-32 parts of modified montmorillonite, 18-35 parts of cross-linked resin, 0.1-1.5 parts of processing auxiliary agent, 2-6 parts of co-crosslinking agent, 0.1-0.5 part of reactive catalyst;

[0006] The cross-linked resin is prepared by mixing and reacting hexamethylene diisocyanate trimer and alcohol hydroxyl double-capped silicone oil in a molar ratio of 1-1.5:1 in a first organic solvent and under an organotin catalyst.

[0007] Further, the average relative molecular weight of the alcohol hydroxyl double-capped silicone oil is 1500-2000, and the viscosity is 50-100 cts at 25 °C.

[0008] Furthermore, the reaction temperature of the hexamethylene diisocyanate trimer and the alcohol hydroxyl group double-capped silicone oil is 50-70°C, and the reaction time is 4-8 h.

[0009] Furthermore, the first organic solvent is one of acetone, tetrahydrofuran, benzene, and toluene.

[0010] Preferably, the cross-linked resin is prepared by the following steps:

[0011] After mixing hexamethylene diisocyanate trimer, alcohol hydroxyl group double-capped silicone oil, and acetone evenly, under nitrogen protection, it is heated to 50-70°C, and an organotin catalyst is added with stirring. The mixture is continuously kept warm and stirred for a reaction time of 4-8 h, then the reaction is stopped, rotary evaporation is carried out, followed by washing with water and drying to obtain the cross-linked resin.

[0012] Furthermore, the reaction for preparing the modified montmorillonite includes:

[0013] After mixing the sodium-based montmorillonite solution and the solution containing the functional modifier, the pH of the mixed solution is adjusted to 3-5, heated to 70-80°C, and stirred for a reaction of 6-12 h. After post-treatment, the modified montmorillonite is obtained;

[0014] Among them, the sodium-based montmorillonite solution is made of sodium-based montmorillonite and a first mixed solvent; the solution containing the functional modifier is made of the functional modifier and a first mixed solvent; the first mixed solvent is formed by mixing water and ethanol.

[0015] Furthermore, the volume ratio of water to ethanol in the first mixed solvent is 1-3:7-9.

[0016] Furthermore, the mass fraction of sodium-based montmorillonite in the sodium-based montmorillonite solution is 30-50%.

[0017] Furthermore, the mass fraction of the functional modifier in the solution containing the functional modifier is 10-20%.

[0018] Furthermore, the mass ratio of sodium-based montmorillonite to the functional modifier is 10:1-3.

[0019] Furthermore, the functional modifier is prepared by reacting chlorinated hydroxybenzophenone and polyhydroxylated silane coupling agent in a second organic solvent.

[0020] Preferably, the functional modifier is prepared by reacting chlorinated hydroxybenzophenone and polyhydroxylated silane coupling agent in a second organic solvent and a first acid-binding agent.

[0021] Furthermore, the reaction temperature of chlorinated hydroxybenzophenone and polyhydroxylated silane coupling agent is 20-60°C, and the reaction time is 2-5 h.

[0022] Further, the molar ratio of the chlorinated hydroxybenzophenone to the polyhydroxylated silane coupling agent is 1:1.

[0023] The structural formula of the chlorinated hydroxybenzophenone is as follows.

[0024]

[0025] Further, the molecular structure of the polyhydroxylated silane coupling agent is as follows.

[0026]

[0027] Further, the second organic solvent is one of dichloromethane, tetrahydrofuran, benzene, and toluene.

[0028] Further, the polyhydroxylated silane coupling agent is prepared by reacting 3-chloropropyltrimethoxysilane and a polyol in a third organic solvent, and the polyhydroxylated silane coupling agent is a monosubstitution reaction product of 3-chloropropyltrimethoxysilane and the polyol, that is, the chlorine in 3-chloropropyltrimethoxysilane substitutes one alcohol hydroxyl group in the polyol.

[0029] Further, the molar ratio of the 3-chloropropyltrimethoxysilane to the polyol is 1:1 - 1.5.

[0030] Further, the reaction temperature of the 3-chloropropyltrimethoxysilane and the polyol is 60 - 65 °C, and the reaction time is 2 - 7 h.

[0031] Preferably, during the reaction of the 3-chloropropyltrimethoxysilane and the polyol in the third organic solvent, an equivalent amount of an acid-binding agent is added to adsorb the by-product hydrogen chloride generated by the reaction of the 3-chloropropyltrimethoxysilane and the polyol, and to accelerate the reaction rate.

[0032] Preferably, during the reaction of the 3-chloropropyltrimethoxysilane and the polyol in the third organic solvent, the 3-chloropropyltrimethoxysilane is added dropwise to the mixed solution of the polyol and the third organic solvent, which can reduce the by-products of the disubstitution reaction or the trisubstitution side reaction during the reaction of the 3-chloropropyltrimethoxysilane and the polyol.

[0033] Preferably, the polyhydroxylated silane coupling agent is prepared by the following steps:

[0034] After mixing the polyol, the second acid-binding agent, and the third organic solvent, heat to 60 - 65 °C, add 3-chloropropyltrimethoxysilane dropwise, and after adding, continue to stir the reaction while maintaining the temperature for 2 - 7 h, filter, and the filtrate is rotary evaporated to recover the organic solvent, washed, and dried to obtain the polyhydroxylated silane coupling agent.

[0035] Furthermore, the polyol is one of glycerol and pentaerythritol.

[0036] Furthermore, the third organic solvent is one of ethyl acetate, tetrahydrofuran, benzene, and toluene.

[0037] Furthermore, the chlorinated hydroxybenzophenone is prepared by reacting chloroacetyl chloride and 2,4-dihydroxybenzophenone in a fourth organic solvent.

[0038] Preferably, the chlorinated hydroxybenzophenone is prepared by reacting chloroacetyl chloride and 2,4-dihydroxybenzophenone in a fourth organic solvent and a third acid-binding agent.

[0039] Furthermore, the molar ratio of chloroacetyl chloride to 2,4-dihydroxybenzophenone is 1-1.5:1.

[0040] Furthermore, the fourth organic solvent is one of dichloromethane, tetrahydrofuran, benzene, and toluene.

[0041] Furthermore, the reaction temperature of chloroacetyl chloride and 2,4-dihydroxybenzophenone is 0-30°C, and the reaction time is 2-7 h.

[0042] Furthermore, the processing aid is a lubricant.

[0043] Furthermore, the co-crosslinking agent is one or more of 3,3'-dichloro-4,4'-diaminodiphenylmethane, 3,5-dimethylthiotoluenediamine, diethyltoluenediamine, and 4,4'-methylenebis(2-ethyl)aniline.

[0044] Preferably, the co-crosslinking agent is 3,5-dimethylthiotoluenediamine.

[0045] Furthermore, the reactive catalyst is triethylenediamine.

[0046] Advantages of the present invention:

[0047] A heat-resistant anti-solder slag cable sheath material provided by the present invention, by adding a crosslinking resin to TPU, and the crosslinking resin is a silane-chain polyurethane, which has good compatibility with TPU. Using the relatively large number of free isocyanate groups in the hyperbranched chain structure of the crosslinking resin, as well as the free amino or hydroxyl groups in TPU, and a co-crosslinking agent, the reaction of isocyanate groups with hydroxyl and amino groups occurs under the action of a catalyst during the subsequent processing, resulting in crosslinking, and an interpenetrating crosslinked network is formed in the finally obtained composite material;

[0048] Secondly, in the present invention, modified montmorillonite is added to TPU. By virtue of the filling effect of montmorillonite, the softening of the TPU system caused by the introduction of silane chains (making the composite material less robust than the original TPU) is eliminated, thereby improving the hardness of the obtained composite material. Moreover, the high-temperature resistance property of montmorillonite, together with the high-temperature resistance of silane chains and the high-temperature resistance of the interpenetrating crosslinked network, form a triple high-temperature modification, synergistically enabling the obtained composite material to resist the temperature of welding slag spots without surface melting, thus solving the problems mentioned in the background art.

[0049] In addition, the modified montmorillonite is modified by a functional modifier, which not only realizes the surface organic modification of montmorillonite and improves its dispersibility in organic substances, but also achieves the purpose of functional modification of montmorillonite for high-temperature oxidation resistance. The introduction of the modified montmorillonite improves the high-temperature oxidation resistance performance of the composite material while enhancing the robustness of TPU. Detailed implementation manners

[0050] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0051] Example 1

[0052] Preparation of the functional modifier:

[0053] A1. After mixing 0.1 mol of chloroacetyl chloride and 70 mL of dichloromethane evenly, under an ice-water bath, 70 mL of dichloromethane containing 0.1 mol of 2,4-dihydroxybenzophenone and 0.2 mol of triethylamine (acting as the third acid-binding agent, in excess) is added dropwise to the mixed solution. After complete addition, the temperature is slowly raised to room temperature, and the reaction is continued with stirring for 4 h. After washing with water and separating the liquid, the organic layer is taken, rotary evaporated, washed with methanol, the organic layer is taken, concentrated and cooled again, and dried to obtain chlorohydroxybenzophenone.

[0054] A2. After mixing 0.12 mol of glycerol, 0.2 mol of aluminum oxide (acting as the second acid-binding agent, in excess) and 120 mL of ethyl acetate, the mixture is heated to 60 - 65 °C, and 0.1 mol of 3-chloropropyltrimethoxysilane is added dropwise. After addition, the reaction is continued with stirring and insulation for 3 h. After filtration, the filtrate is rotary evaporated to recover the organic solvent, washed, and dried to obtain a polyhydroxylated silane coupling agent.

[0055] A3. Mix 0.1 mol of chlorinated hydroxybenzophenone, 0.1 mol of polyhydroxylated silane coupling agent, 0.15 mol of triethylamine (acting as the first acid-binding agent, in excess), and 100 mL of dichloromethane evenly in an ice-water bath. After mixing, slowly warm up to 60 °C and stir for 2 h. Wash with water, separate the liquid, rotary evaporate the organic phase, and dry to obtain the functional modifier.

[0056] Example 2

[0057] Preparation of the functional modifier:

[0058] A1. After mixing 0.15 mol of chloroacetyl chloride and 70 mL of dichloromethane evenly, dropwise add 70 mL of dichloromethane containing 0.1 mol of 2,4-dihydroxybenzophenone and 0.2 mol of triethylamine (acting as the third acid-binding agent) to the mixed solution in an ice-water bath. After complete dropwise addition, slowly warm up to room temperature and continue stirring for 7 h. Wash with water, separate the liquid, take the organic layer, rotary evaporate, wash with methanol, take the organic layer, concentrate and cool again, and dry to obtain chlorinated hydroxybenzophenone;

[0059] A2. Mix 0.15 mol of pentaerythritol, 0.2 mol of aluminum oxide (acting as the second acid-binding agent), and 120 mL of ethyl acetate, heat to 60 - 65 °C, dropwise add 0.1 mol of 3-chloropropyltrimethoxysilane. After addition, continue to keep warm and stir for 7 h, filter, rotary evaporate the filtrate to recover the organic solvent, wash, and dry to obtain the polyhydroxylated silane coupling agent;

[0060] A3. Mix 0.1 mol of chlorinated hydroxybenzophenone, 0.1 mol of polyhydroxylated silane coupling agent, 0.15 mol of triethylamine (acting as the first acid-binding agent), and 100 mL of dichloromethane evenly in an ice-water bath. After mixing, slowly warm up to 40 °C and stir for 5 h. Wash with water, separate the liquid, rotary evaporate the organic phase, and dry to obtain the functional modifier.

[0061] Example 3

[0062] Preparation of the modified montmorillonite:

[0063] Mix the sodium-based montmorillonite solution and the solution containing the functional modifier prepared in Example 1, adjust the pH of the mixed solution to 3 - 5, heat to 70 °C, stir for 12 h, and perform post-treatment to obtain the modified montmorillonite;

[0064] Among them, the sodium-based montmorillonite solution is made of sodium-based montmorillonite and a mixed solvent; the solution containing the functional modifier is made by mixing the functional modifier with a mixed solvent of water / ethanol (the volume ratio of water to ethanol is 1:9); the mass fraction of sodium-based montmorillonite in the sodium-based montmorillonite solution is 30%. The mass fraction of the functional modifier in the solution containing the functional modifier is 10%. The mass ratio of the sodium-based montmorillonite to the functional modifier is 10:2.

[0065] Example 4

[0066] Preparation of modified montmorillonite:

[0067] After mixing the sodium-based montmorillonite solution and the solution containing the functional modifier prepared in Example 2, adjust the pH of the mixed solution to 3 - 5, heat to 80 °C, stir and react for 6 h, and after post-treatment, obtain modified montmorillonite;

[0068] Among them, the sodium-based montmorillonite solution is made of sodium-based montmorillonite and a mixed solvent; the solution containing the functional modifier is made by mixing the functional modifier with a mixed solvent of water / ethanol (the volume ratio of water to ethanol is 2:8); the mass fraction of sodium-based montmorillonite in the sodium-based montmorillonite solution is 40%. The mass fraction of the functional modifier in the solution containing the functional modifier is 10%. The mass ratio of the sodium-based montmorillonite to the functional modifier is 10:3.

[0069] Example 5

[0070] Preparation of crosslinked resin:

[0071] After mixing 0.12 mol of hexamethylene diisocyanate trimer, 0.1 mol of alcohol hydroxyl double-capped silicone oil and 200 mL of acetone evenly, under nitrogen protection, heat to 50 °C, add 10 g of organotin catalyst (T12) with stirring, continue to keep warm and stir for 8 h, stop the reaction, rotary evaporate, wash with water, and dry to obtain crosslinked resin, where the average relative molecular weight of the alcohol hydroxyl double-capped silicone oil is 1500 - 2000, and the viscosity is 50 - 100 cts at 25 °C.

[0072] Example 6

[0073] Preparation of crosslinked resin:

[0074] After mixing 0.15 mol of hexamethylene diisocyanate trimer, 0.1 mol of alcohol hydroxyl double-capped silicone oil and 200 mL of toluene evenly, under nitrogen protection, heat to 50 °C, add 10 g of organotin catalyst (T12) with stirring, continue to keep warm and stir for 4 h, stop the reaction, rotary evaporate, wash with water, and dry to obtain crosslinked resin, where the average relative molecular weight of the alcohol hydroxyl double-capped silicone oil is 1500 - 2000, and the viscosity is 50 - 100 cts at 25 °C.

[0075] Example 7

[0076] Preparation of high temperature resistant and solder splash resistant cable sheath material:

[0077] I. Prepare raw materials including the following parts by weight: 80 parts of TPU, 16 parts of the modified montmorillonite prepared in Example 3, 35 parts of the crosslinked resin prepared in Example 5, 0.1 part of lubricant (polyethylene wax), 6 parts of co-crosslinking agent (3,5-dimethylthio toluene diamine), 0.5 part of reactive catalyst (triethylenediamine);

[0078] II. Mix the above raw materials by weight and add them to a twin-screw extruder, and extrude and pelletize to obtain the sheath material, and the extrusion temperature is 190 - 245 °C.

[0079] Example 8

[0080] Preparation of high temperature resistant and solder splash resistant cable sheath material:

[0081] I. Prepare raw materials including the following parts by weight: 90 parts of TPU, 20 parts of the modified montmorillonite prepared in Example 3, 20 parts of the crosslinked resin prepared in Example 5, 0.6 part of lubricant (polyethylene wax), 4 parts of co-crosslinking agent (3,5-dimethylthio toluene diamine), 0.2 part of reactive catalyst (triethylenediamine);

[0082] II. Mix the above raw materials by weight and add them to a twin-screw extruder, and extrude and pelletize to obtain the sheath material, and the extrusion temperature is 190 - 245 °C.

[0083] Example 9

[0084] Preparation of high temperature resistant and solder splash resistant cable sheath material:

[0085] I. Prepare raw materials including the following parts by weight: 100 parts of TPU, 32 parts of the modified montmorillonite prepared in Example 3, 18 parts of the crosslinked resin prepared in Example 5, 0.1 - 1.5 parts of lubricant (polyethylene wax), 2 parts of co-crosslinking agent (3,5-dimethylthio toluene diamine), 0.1 part of reactive catalyst (triethylenediamine);

[0086] II. Mix the above raw materials by weight and add them to a twin-screw extruder, and extrude and pelletize to obtain the sheath material, and the extrusion temperature is 190 - 245 °C.

[0087] Comparative Example 1

[0088] Preparation of cable sheath material:

[0089] Compared with Example 8, delete the co-crosslinking agent in the raw materials, and the others are the same.

[0090] Comparative Example 2

[0091] Compared with Example 8, the equivalent parts of the modified montmorillonite in the raw materials were replaced with montmorillonite prepared by the following steps, and the rest was the same:

[0092] Preparation of modified montmorillonite:

[0093] After mixing the sodium-based montmorillonite solution and the polyhydroxylated silane coupling agent solution prepared in Step A2 of Example 1, the pH of the mixed solution was adjusted to 3 - 5, heated to 70 °C, and stirred and reacted for 12 h. After post-treatment, modified montmorillonite was obtained;

[0094] Among them, the sodium-based montmorillonite solution was made of sodium-based montmorillonite and a mixed solvent; the solution containing the functional modifier was made by mixing the functional modifier with a mixed solvent of water / ethanol (the volume ratio of water to ethanol was 1:9); the mass fraction of sodium-based montmorillonite in the sodium-based montmorillonite solution was 30%. The mass fraction of the polyhydroxylated silane coupling agent in the solution containing the polyhydroxylated silane coupling agent was 10%. The mass ratio of the sodium-based montmorillonite to the functional modifier was 10:2.

[0095] Comparative Example 3

[0096] Preparation of cable sheath material:

[0097] Compared with Example 8, the modified montmorillonite in the raw materials was deleted, and the rest was the same.

[0098] Comparative Example 4

[0099] Preparation of cable sheath material:

[0100] Compared with Example 8, the modified montmorillonite and the crosslinking resin in the raw materials were deleted, and the rest was the same.

[0101] The sheath materials obtained from Examples 7 - 9 and Comparative Examples 1 - 3 were subjected to molding and sampling for physical property testing. The test results are shown in Table 1; among them, the heat aging was tested according to GB / T 7141. After the heat aging test was completed, the tensile strength was tested, and the decrease rate of the tensile strength was calculated; anti-welding slag spot test: An electric soldering iron at 250 ± 20 °C was ironed on the surface of the sample for 3 - 5 s, and it was observed whether there was a focus at the ironed place. If the test showed that there was no focus at the ironed place, the anti-welding slag spot test was passed; if the test showed that there was a focus at the ironed place, the anti-welding slag spot test was not passed.

[0102] Table 1

[0103]

[0104]

[0105] It can be seen from the data in Table 1 that the sheath materials obtained from Examples 7 - 9 have good hardness, high temperature resistance, and anti-welding slag spot performance.

[0106] In the description of the specification, the descriptions referring to the reference terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0107] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A high temperature resistant and anti-welding slag cable sheath material, characterized in that: The invention comprises the following raw materials in parts by weight: 80-100 parts of TPU, 20-40 parts of modified montmorillonite, 18-35 parts of cross-linking resin, 0.1-1.5 parts of processing auxiliary agent, 2-6 parts of auxiliary cross-linking agent, and 0.1-0.5 parts of reaction catalyst; The cross-linking resin is prepared by mixing and reacting hexamethylene diisocyanate trimer and alcohol hydroxyl di-terminated silicone oil in a first organic solvent in a molar ratio of 1-1.5:1 under an organic tin catalyst; The preparation reaction of the modified montmorillonite comprises: After mixing the sodium-based montmorillonite solution and the solution containing the functional modifier, the pH of the mixed solution is adjusted to 3-5, heated to 70-80°C, stirred for reaction for 6-12 hours, and post-treated to obtain modified montmorillonite; Wherein, the sodium-montmorillonite solution is made of sodium-montmorillonite and a first mixed solvent; the solution containing a functional modifier is made of a functional modifier and a first mixed solvent; the first mixed solvent is formed by mixing water and ethanol; The functional modifier is prepared by reacting chlorinated hydroxybenzophenone and a polyhydroxylated silane coupling agent in a second organic solvent; The polyhydroxylated silane coupling agent is prepared by reacting 3-chloropropyltrimethoxysilane and a polyol in a third organic solvent; The auxiliary cross-linking agent is one or more of 3,3'-dichloro-4,4'-diaminophenylmethane, 3,5-dimethylthiotoluenediamine, diethyltoluenediamine, and 4,4'-methylenebis(2-ethyl)aniline.

2. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The reaction temperature of the hexamethylene diisocyanate trimer and the alcohol hydroxyl double-terminated silicone oil is 50-70° C., and the reaction time is 4-8 hours.

3. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The first organic solvent is one of acetone, tetrahydrofuran, benzene and toluene.

4. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The reaction temperature of the chlorinated hydroxybenzophenone and the polyhydroxylated silane coupling agent is 20-60° C., and the reaction time is 2-5 hours.

5. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The molar ratio of the chlorinated hydroxybenzophenone to the polyhydroxylated silane coupling agent is 1:1; and the second organic solvent is one of dichloromethane, tetrahydrofuran, benzene and toluene.

6. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The molar ratio of the 3-chloropropyltrimethoxysilane to the polyol is 1:1-1.5; the reaction temperature of the 3-chloropropyltrimethoxysilane and the polyol is 60-65°C, and the reaction time is 2-7h; the polyol is one of glycerol and pentaerythritol; and the third organic solvent is one of ethyl acetate, tetrahydrofuran, benzene and toluene.

7. The high temperature resistant and anti-welding slag cable sheath material according to claim 1, characterized in that: The chlorinated hydroxybenzophenone is prepared by reacting chloroacetyl chloride and 2,4-dihydroxybenzophenone in a fourth organic solvent.

8. The high temperature resistant and welding slag proof cable sheath material according to claim 7, characterized in that: The molar ratio of the chloroacetyl chloride to 2,4-dihydroxybenzophenone is 1:1, and the fourth organic solvent is one of dichloromethane, tetrahydrofuran, benzene, and toluene; the reaction temperature of the chloroacetyl chloride and 2,4-dihydroxybenzophenone is 0-30° C., and the reaction time is 2-7 hours.

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