Low-temperature-resistant special rubber cable material, cable, preparation method and application thereof

Abstract

The present application relates to the technical field of rubber cable material, in particular to a low-temperature-resistant special rubber cable material, a cable and a preparation method and application thereof, the low-temperature-resistant special rubber cable material comprises the following raw materials in parts by weight: SEBS thermoplastic elastomer 40-80 parts, PP 20-40 parts, PE 20-40 parts, EPDM 10-20 parts, NBR 5-15 parts, modified calcium powder 10-20 parts, white oil 10-20 parts, antioxidant 0.1-1 part, plasticizer 5-15 parts, vulcanizing agent 1-3 parts, and compatibilizer 2-6 parts. The low-temperature-resistant special rubber cable material prepared by the present application has the advantages of high strength, good wear resistance and good heat extension, and can resist low temperature of-60 DEG C.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber cable materials, in particular to a low-temperature-resistant special rubber cable material, a cable and a preparation method and application thereof. BACKGROUND

[0002] With the rapid development of the global economy, infrastructure construction is continuously advancing, and the demand for cables in the power, communication, transportation and other industries is continuously growing. Rubber cable material, as the core material of wire and cable, its performance directly affects the service life and safety of the cable. At present, the traditional rubber cable material still needs to be improved in terms of flexibility in low-temperature environment and stability in high-temperature environment. For example, in a low-temperature environment, the insulating layer and sheath material of the cable are prone to hardening and embrittlement, and thus are prone to cracking or damage when subjected to external force. In addition, unqualified thermal elongation performance can also cause the material to soften and deform at high temperatures, resulting in a decrease in insulation performance, and even causing safety hazards such as electric leakage.

[0003] Patent CN105255072A discloses a high and low temperature resistant rubber cable sheath material, the raw materials of which include fluoroether rubber, hydrogenated nitrile rubber, acrylate rubber, tetrafluoroethylene-perfluoromethyl vinyl ether copolymer, zinc oxide, stearic acid, 2,5-dimethyl-2,5-di(tert-butyl peroxy) hexane, carbon black, nano silicon nitride, hollow glass microspheres, di-n-octyl phthalate, di[2-(2-butoxyethoxy) ethyl] adipate, triallyl isocyanurate, zinc methacrylate, accelerator, antioxidant, dihydroxy polydimethyl siloxane, lanthanum stearate. The high and low temperature resistant rubber cable sheath material proposed by the present application has excellent high and low temperature resistance, oil resistance, good processing performance and aging resistance, and small compression permanent deformation. However, the cost of fluoroether rubber and tetrafluoroethylene-perfluoromethyl vinyl ether copolymer is high, which makes it difficult to realize industrialization.

[0004] Patent CN118956051A discloses a kind of special cable of extreme environment resistance, from outside to inside include sheath layer, insulating layer and conductive wire core in turn;The sheath layer is made of sheath material, the sheath material includes the following mass fraction of components: modified ethylene-vinyl acetate copolymer 40-60 parts, elastomer 35-90 parts, modified filler 30-50 parts, plasticizer 15-25 parts, POE-g-GMA 3-8 parts, auxiliary agent 0.5-27 parts.The special cable provided by the application has excellent oil resistance and wear resistance, and good aging resistance and tensile properties, etc., is suitable for producing logging cable, oil production cable, heat-resistant cable and other special cables in extreme environment.But the way of the invention modified ethylene-vinyl acetate copolymer is to use silane coupling agent modified halloysite to modify ethylene-vinyl acetate copolymer, the nanotubular structure of halloysite is easy to agglomerate, even after surface modification, local aggregation may be formed in polymer matrix, affecting the mechanical properties of composite.

[0005] Therefore, there is an urgent need in the market to develop a rubber cable material with excellent mechanical properties suitable for high and low temperature extreme environments. SUMMARY

[0006] In view of the problems in the prior art, the purpose of the present application is to obtain a low-temperature-resistant special rubber cable material with excellent mechanical properties, wear resistance and thermal elongation, and a simple preparation method.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] The first aspect of the present application provides a kind of low-temperature-resistant special rubber cable material, by weight parts, including the following raw materials: SEBS thermoplastic elastomer 40-80 parts, PP 20-40 parts, PE 20-40 parts, EPDM 10-20 parts, NBR 5-15 parts, modified calcium powder 10-20 parts, white oil 10-20 parts, antioxidant 0.1-1 parts, plasticizer 5-15 parts, vulcanizing agent 1-3 parts, compatibilizer 2-6 parts.

[0009] The special rubber cable material prepared by blending the SEBS thermoplastic elastomer, PP, PE, EPDM, NBR, modified calcium powder and plasticizer, antioxidant, flame retardant, vulcanizing agent can resist low temperature of-60 DEG C, can be used normally in the severe weather environment of northern Europe, solves the problem that the ordinary rubber is not resistant to low temperature, the special rubber cable material also has the characteristics of good wear resistance and good hot extension, can solve the problem that the ordinary rubber is not resilient and the burning word is not resistant to rubbing. And the special rubber cable material prepared in the application does not need additional vulcanization operation, can be self-vulcanized in the preparation process of the rubber cable material and the cable, also can be irradiated by high temperature of 150 DEG C, further improves the wear resistance of the rubber and makes it not sticky. And the SEBS thermoplastic elastomer and EPDM have excellent ultraviolet resistance and ozone resistance, so that the special rubber is more durable after wind and sun.

[0010] In some embodiments, the PE is LLDPE.

[0011] In some embodiments, the preparation method of the modified calcium powder comprises the following steps:

[0012] A1, 3-aminopropyltriethoxysilane is added to dichloromethane, stirred at room temperature for 20-30 min, then alpha-lipoic acid, maleic anhydride and N,N'-dicyclohexyl carbodiimide are added, and the reaction is carried out at 25-37 DEG C for 2-3 h, then filtered, added with toluene, and rotary evaporated to obtain the compound;

[0013] A2, calcium powder and calcium carbonate whisker are added to deionized water, stirred at room temperature for 20-30 min to obtain slurry, then the compound obtained in step A1, deionized water are added to ethanol, stirred at room temperature for 45-75 min, then added with anhydrous ethanol and adjusted to pH 7-8, then added with the slurry, and heated to 60-80 DEG C and stirred for 6-10 h, then washed, centrifuged and dried to obtain the modified calcium powder.

[0014] In existing technologies, Si-69 is often used to modify calcium powder to improve its dispersibility and enhance the bonding force between calcium powder and rubber. However, Si-69 molecules contain tetrasulfide groups, which are prone to breakage and participation in vulcanization reactions during high-temperature mixing or processing, leading to premature vulcanization and scorching of the rubber compound. This not only increases the difficulty of mixing but may also result in uneven rubber compound properties. To address these issues, this application synthesizes a modification system containing cyclic disulfides, double bonds, silane coupling agents, and carboxyl groups by reacting 3-aminopropyltriethoxysilane with α-lipoic acid and maleic anhydride. This system is then used to modify calcium powder. Furthermore, the addition of calcium carbonate whiskers during the calcium powder modification process gives the modified rubber cable better wear resistance, mechanical properties, and high and low temperature resistance. This may be because, on the one hand, the introduction of carboxyl groups and double bonds can enhance the interaction between modified calcium powder and SEBS thermoplastic elastomer and NBR through hydrogen bonding and π-π conjugation, thereby improving the dispersibility of calcium powder in the rubber system and thus improving the strength, wear resistance, and thermal elongation of rubber cable materials. On the other hand, the introduction of cyclic disulfide bonds and double bonds further promotes the formation of cross-linked structures in the rubber system, thus improving the high-temperature resistance and wear resistance of rubber cable materials. The simultaneous addition of calcium powder and calcium carbonate whiskers to the rubber system can also increase the volume of the rubber material, improve the system's heat dissipation capacity, and the cyclic disulfide bonds have a more stable structure than tetrasulfide groups, reducing the occurrence of scorching. Furthermore, the calcium carbonate whiskers dispersed in the system can interweave in the cross-linked network structure, which can reduce defects in the cross-linked network by restricting the movement of molecular chains, and can reduce the crystallization tendency of the rubber cable material at low temperatures by improving the uniformity of the cross-linked network, thereby improving the mechanical properties, wear resistance, low-temperature resistance, and thermal elongation of the rubber cable material.

[0015] Meanwhile, calcium powder and calcium carbonate whiskers, as intermediate substances, can link α-lipoic acid segments and maleic anhydride segments, giving the substance a compatibilizing effect. Its octanoic acid segments have good compatibility with PP and PE, while the double bonds and carboxyl groups have strong interaction forces with SEBS thermoplastic elastomer, further improving the compatibility between PP, PE and SEBS thermoplastic elastomer. Furthermore, cyclic disulfides can participate in the vulcanization process of EPDM and NBR, making the mixing of the five polymers and the polymers with calcium powder more uniform, which is beneficial to improving the wear resistance, mechanical properties and thermal elongation properties of modified rubber cable materials.

[0016] In some embodiments, the calcium powder is ultrafine heavy calcium carbonate.

[0017] In some embodiments, the mass ratio of 3-aminopropyltriethoxysilane to α-lipoic acid is 1:(0.4-0.7).

[0018] In some embodiments, the mass ratio of the 3-aminopropyl triethoxysilane and maleic anhydride is 1:(0.1-0.4)

[0019] The present application can make the modified rubber cable material have better wear resistance, mechanical properties, and better heat extension performance by limiting the ratio of 3-aminopropyl triethoxysilane and alpha-lipoic acid and 3-aminopropyl triethoxysilane and maleic anhydride, which may be because the distribution of octanoic acid segment, carboxyl and double bond group is more uniform at this ratio, thereby improving the compatibilization effect while maintaining good vulcanization effect.

[0020] In some embodiments, the mass ratio of the calcium powder and calcium carbonate whisker is 1:(0.3-0.6)

[0021] In some embodiments, the mass ratio of the calcium powder and the compound in step A2 is 1:(0.05-0.2)

[0022] The present application can make the modified rubber cable material have better wear resistance, mechanical properties, and better heat extension performance and low temperature resistance by limiting the mass ratio of calcium powder and calcium carbonate whisker and calcium powder and compound, which may be because the calcium powder has better dispersibility at this ratio, and the crosslinking network structure is more uniform, reducing the crystallization tendency of the rubber cable material at low temperature.

[0023] In some embodiments, the antioxidant is a combination of antioxidant 1010 and antioxidant 168, and the mass ratio of the two is 1:(0.5-1).

[0024] In some embodiments, the plasticizer is one or more of dioctyl terephthalate, dioctyl sebacate, dioctyl phthalate, and bis(2-ethylhexyl) terephthalate.

[0025] Preferably, the plasticizer is bis(2-ethylhexyl) terephthalate.

[0026] In some embodiments, the vulcanizing agent is dicumyl peroxide.

[0027] In some embodiments, the compatibilizer is SEBS-g-MAH or EPDM-g-MAH.

[0028] The second aspect of the present application provides a preparation method of a low-temperature-resistant special rubber cable material, comprising the following steps:

[0029] S1, adding SEBS thermoplastic elastomer, PP, PE, EPDM, NBR, modified calcium powder, white oil, antioxidant, plasticizer, vulcanizing agent, and compatibilizer into a high-speed mixer to mix and obtain a premix;

[0030] S2, the premix is added into a double screw extruder, melt blending is carried out, and extrusion granulation is carried out, the extrusion temperature is 180-220 DEG C, the screw rotation speed is 100-200 r / min, and the low-temperature-resistant special rubber cable material is obtained.

[0031] The third aspect of the application provides application of the low-temperature-resistant special rubber cable material in BH-YC, BH-YCW, BH-YZ, BH-YZW, BH-YH cables, mining and ship cables, and harbor machine cables.

[0032] The fourth aspect of the application provides a preparation method of the low-temperature-resistant special rubber cable, comprising the following steps:

[0033] B1, the conductor is preheated at 200-350 DEG C for 15-20 min, a plurality of conductors are drawn and twisted together after drawing work, and an insulating material is coated while twisting, and then drying is carried out, so that the cable core is obtained;

[0034] B2, a plurality of cable cores obtained in step B1 are twisted into a cable to obtain a multi-core cable, and the low-temperature-resistant special rubber cable material is wrapped on the surface of the multi-core cable, so that the low-temperature-resistant special rubber cable is obtained.

[0035] Compared with the prior art, the application has the following beneficial effects:

[0036] (1) The modified rubber cable material prepared by blending SEBS, PP, PE, EPDM, NBR, modified calcium powder and a compatibilizer, an antioxidant and the like has the advantages of high strength, good wear resistance and excellent heat extension, and is suitable for high and low temperature extreme environments.

[0037] (2) The modified system containing a cyclic disulfide, a double bond, a silane coupling agent and a carboxyl is synthesized by reacting 3-aminopropyl triethoxysilane with alpha-lipoic acid and maleic anhydride, and is used for modifying calcium powder. On the one hand, the introduction of carboxyl and double bond can enhance the interaction between substances, improve the dispersibility of calcium powder in the rubber system and the compatibility between SEBS, PP, PE, EPDM and NBR, and further improve the strength, wear resistance and heat extension performance of the rubber cable material. On the other hand, the introduction of cyclic disulfide bond and double bond further promotes the formation of crosslinking structure in the rubber system, and further improves the high temperature resistance and wear resistance of the rubber cable material.

[0038] (3) The introduction of calcium carbonate whiskers in the rubber system can further improve the wear resistance of the rubber cable material, and the calcium carbonate whiskers dispersed in the system can be inserted in the crosslinking network structure, which can limit the movement of molecular chains and reduce the defects in the crosslinking network, thereby improving the strength, wear resistance and heat extension performance of the rubber cable material. DETAILED DESCRIPTION

[0039] The present application will be described in detail below with reference to specific embodiments. It should be noted that the following examples are illustrative of specific embodiments of the application and are not intended to limit the scope of the application. Other combinations and sub-combinations of the disclosed features and elements, and other modifications, variations, and uses will be apparent to those skilled in the art.

[0040] In the following examples and comparative examples, the compounds and related reagents used, except for the modified calcium powder, can be purchased from the market, wherein the average particle size of the superfine heavy calcium is 2000 mesh, purchased from Lingshou County Baixin New Material Technology Co., Ltd.; the type of SEBS thermoplastic elastomer is YH 522, purchased from Dongguan Shengli New Material Co., Ltd.; the brand of PP is KF-T30S, purchased from Ningbo Jinfa New Material Co., Ltd.; the type of LLDPE is Dow 2607G, purchased from Suzhou Shunwangjia International Trade Co., Ltd.; the type of EPDM is EPDM4045, purchased from China Petroleum Jilin Petrochemical Company; the brand of NBR is 3305E, purchased from Dongguan Zhengtao Plastic Co., Ltd.

[0041] Preparation Example 1

[0042] The preparation method of modified calcium powder-1 comprises the following steps:

[0043] A1, 10g of 3-aminopropyltriethoxysilane was added to 50g of dichloromethane, stirred at room temperature for 25min, 5.5g of alpha-lipoic acid, 2.5g of maleic anhydride and 5g of N,N'-dicyclohexyl carbodiimide were added, and the reaction was carried out at 30℃ for 2.5h, then filtered, 50g of toluene was added, and rotary evaporation was carried out to obtain the compound;

[0044] A2, 10g of superfine heavy calcium and 4g of calcium carbonate whisker were added to 50g of deionized water, stirred at room temperature for 25min to obtain a slurry, 1g of the compound obtained in step A1, 5ml of deionized water was added to 50ml of ethanol, stirred at room temperature for 60min, 200ml of anhydrous ethanol was added and the pH was adjusted to 7, then the slurry was added, and the temperature was raised to 70℃ and stirred for 8h, then washed with anhydrous ethanol, centrifuged and dried to obtain modified calcium powder-1.

[0045] Preparation Example 2

[0046] The preparation method of modified calcium powder-2 is the same as that of Preparation Example 1, except that the amount of alpha-lipoic acid added is 9g.

[0047] Preparation Example 3

[0048] The preparation method of modified calcium powder-3 is the same as that of Preparation Example 1, except that the amount of maleic anhydride added is 6g.

[0049] Preparation Example 4

[0050] The preparation method of modified calcium powder-4 is the same as that of preparation example 1, except that the adding amount of calcium carbonate whisker is 2 g.

[0051] Preparation example 5

[0052] The preparation method of modified calcium powder-5 is the same as that of preparation example 1, except that the adding amount of compound is 2.3 g.

[0053] Preparation example 6

[0054] The preparation method of modified calcium powder-6 comprises the following steps:

[0055] A1, 10 g of 3-aminopropyltriethoxysilane is added to 50 g of dichloromethane, stirred at room temperature for 25 min, 5.5 g of alpha-lipoic acid, 2.5 g of maleic anhydride and 5 g of N,N'-dicyclohexyl carbodiimide are added, and the reaction is carried out at 30°C for 2.5 h, then filtered, 50 g of toluene is added, and rotary evaporation is carried out to obtain the compound;

[0056] A2, 10 g of superfine heavy calcium is added to 50 g of deionized water, stirred at room temperature for 25 min to obtain a slurry, 1 g of the compound obtained in step A1, 5 ml of deionized water is added to 50 ml of ethanol, stirred at room temperature for 60 min, 200 ml of anhydrous ethanol is added and the pH is adjusted to 7, then the slurry is added, and the temperature is raised to 70°C and stirred for 8 h, then washed with anhydrous ethanol, centrifuged and dried to obtain modified calcium powder-6.

[0057] Example 1

[0058] A kind of low temperature resistant special rubber cable material, including the following raw materials by weight parts: SEBS thermoplastic elastomer 60 parts, PP 30 parts, LLDPE 30 parts, EPDM 15 parts, NBR 10 parts, modified calcium powder-1 15 parts, white oil 15 parts, antioxidant 10100.3 parts, antioxidant 168 0.2 parts, bis (2-ethylhexyl) terephthalate 10 parts, dicumyl peroxide 2 parts, EPDM-g-MAH 4 parts.

[0059] The preparation method of the low temperature resistant special rubber cable material of the embodiment comprises the following steps:

[0060] S1, SEBS thermoplastic elastomer, PP, LLDPE, EPDM, NBR, modified calcium powder-1, white oil, antioxidant 1010, antioxidant 168, bis (2-ethylhexyl) terephthalate, dicumyl peroxide, EPDM-g-MAH are added to a high-speed mixer to obtain a premix;

[0061] S2, the premix is added to a twin-screw extruder for melt blending, extrusion granulation, the extrusion temperature is 200°C, and the screw rotation speed is 150 r / min, to obtain a low temperature resistant special rubber cable material.

[0062] Example 2

[0063] A low-temperature-resistant special rubber cable material, comprising the following raw materials in parts by weight: SEBS thermoplastic elastomer 40 parts, PP 20 parts, LLDPE 20 parts, EPDM 10 parts, NBR 5 parts, modified calcium powder-1 10 parts, white oil 10 parts, antioxidant 1010 0.06 parts, antioxidant 168 0.04 parts, bis(2-ethylhexyl) terephthalate 5 parts, dicumyl peroxide 1 part, EPDM-g-MAH 2 parts.

[0064] The preparation method of the low-temperature-resistant special rubber cable material of the embodiment comprises the following steps:

[0065] S1, mix SEBS thermoplastic elastomer, PP, LLDPE, EPDM, NBR, modified calcium powder-1, white oil, antioxidant 1010, antioxidant 168, bis(2-ethylhexyl) terephthalate, dicumyl peroxide, and EPDM-g-MAH in a high-speed mixer to obtain a premix;

[0066] S2, add the premix into a twin-screw extruder for melt blending, extrusion granulation, the extrusion temperature is 180°C, and the screw rotation speed is 200 r / min to obtain the low-temperature-resistant special rubber cable material.

[0067] Example 3

[0068] A low-temperature-resistant special rubber cable material, comprising the following raw materials in parts by weight: SEBS thermoplastic elastomer 80 parts, PP 40 parts, LLDPE 40 parts, EPDM 20 parts, NBR 15 parts, modified calcium powder-1 20 parts, white oil 20 parts, antioxidant 1010 0.6 parts, antioxidant 168 0.4 parts, bis(2-ethylhexyl) terephthalate 15 parts, dicumyl peroxide 3 parts, and EPDM-g-MAH 6 parts.

[0069] The preparation method of the low-temperature-resistant special rubber cable material of the embodiment comprises the following steps:

[0070] S1, mix SEBS thermoplastic elastomer, PP, LLDPE, EPDM, NBR, modified calcium powder-1, white oil, antioxidant 1010, antioxidant 168, bis(2-ethylhexyl) terephthalate, dicumyl peroxide, and EPDM-g-MAH in a high-speed mixer to obtain a premix;

[0071] S2, add the premix into a twin-screw extruder for melt blending, extrusion granulation, the extrusion temperature is 220°C, and the screw rotation speed is 100 r / min to obtain the low-temperature-resistant special rubber cable material.

[0072] Example 4

[0073] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-2 in equal amount.

[0074] Example 5

[0075] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-3 in equal amount.

[0076] Example 6

[0077] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-4 in equal amount.

[0078] Example 7

[0079] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-5 in equal amount.

[0080] Example 8

[0081] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-6 in equal amount.

[0082] Example 9

[0083] A preparation method of a low-temperature-resistant special rubber cable, comprising the following steps:

[0084] B1, preheat the copper conductor at 270 DEG C for 17 min, after drawing work on multiple copper conductors, twist together, coating insulation material at the same time, drying, to get cable core;

[0085] B2, 50 cable cores obtained in step B1 are twisted into a cable to obtain a multi-core cable, and a low-temperature-resistant special rubber cable material is wrapped around the surface of the multi-core cable using an extruder to obtain a low-temperature-resistant special rubber cable.

[0086] Comparative example 1

[0087] A low-temperature-resistant special rubber cable material and a preparation method thereof, the specific implementation manner is the same as that of example 1, the difference lies in that the modified calcium powder-1 is replaced by the modified calcium powder-2 in equal amount.

[0088] Performance test

[0089] The low-temperature-resistant special rubber cable material obtained from each of the above examples and the comparative example according to Table 1 is applied to the preparation method of Example 9, to obtain each low-temperature-resistant special rubber cable, and the performance of each low-temperature-resistant special rubber cable is tested.

[0090] Table 1

[0091]

[0092] The test results are shown in Table 2:

[0093] Table 2

[0094]

[0095]

[0096] As can be seen from the data in Table 1, the low-temperature-resistant special rubber cable material of Examples 1-3 has excellent mechanical properties, high and low temperature resistance, and wear resistance. As can be seen from the comparison between Example 4, 5 and Example 1, changing the ratio of 3-aminopropyl triethoxysilane and alpha-lipoic acid or the ratio of 3-aminopropyl triethoxysilane and maleic anhydride will make the distribution of octanoic acid segment, carboxyl and double bond group uneven, which will make the compatibilization effect or vulcanization effect worse, and thus the mechanical properties, high and low temperature resistance, and wear resistance of the rubber cable material will decrease. As can be seen from the comparison between Example 6 and Example 1, changing the ratio of calcium powder and calcium carbonate whisker will make the uniformity of the crosslinking network in the rubber cable material decrease, which will make the rubber cable material more likely to crystallize at low temperature, resulting in a decrease in the mechanical properties, high and low temperature resistance, and wear resistance of the rubber cable material. As can be seen from the comparison between Example 7 and Example 1, changing the ratio of calcium powder and the compound will make the rubber cable material more likely to scorch during processing, resulting in a decrease in the mechanical properties, wear resistance, and high and low temperature resistance of the rubber cable material. As can be seen from the comparison between Example 8 and Example 1, not adding calcium carbonate whisker will make the mechanical properties, wear resistance, and high and low temperature resistance of the rubber cable material worse. As can be seen from the comparison between Comparative Example 1 and Example 1, using ordinary calcium powder will result in poor mechanical properties, high and low temperature resistance, and wear resistance of the rubber cable material.

[0097] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A special low-temperature resistant rubber cable material, characterized in that, By weight, it includes the following raw materials: 40-80 parts of SEBS thermoplastic elastomer, 20-40 parts of PP, 20-40 parts of PE, 10-20 parts of EPDM, 5-15 parts of NBR, 10-20 parts of modified calcium powder, 10-20 parts of white oil, 0.1-1 parts of antioxidant, 5-15 parts of plasticizer, 1-3 parts of vulcanizing agent, and 2-6 parts of compatibilizer; The method for preparing the modified calcium powder includes the following steps: A1. Add 3-aminopropyltriethoxysilane to dichloromethane and stir at room temperature for 20-30 min. Add α-lipoic acid, maleic anhydride and N,N'-dicyclohexylcarbodiimide and react at 25-37℃ for 2-3 h. Filter, add toluene and rotary evaporate to obtain the compound. A2. Add calcium powder and calcium carbonate whiskers to deionized water and stir at room temperature for 20-30 min to obtain a slurry. Add the compound obtained in step A1 and deionized water to ethanol and stir at room temperature for 45-75 min. Add anhydrous ethanol and adjust the pH to 7-8. Add the slurry and heat to 60-80℃ and stir for 6-10 h. Wash, centrifuge and dry to obtain modified calcium powder. The mass ratio of 3-aminopropyltriethoxysilane to α-lipoic acid is 1:(0.4-0.7). The mass ratio of 3-aminopropyltriethoxysilane to maleic anhydride is 1:(0.1-0.4). The mass ratio of calcium powder to calcium carbonate whiskers is 1:(0.3-0.6). The mass ratio of calcium powder to compound in step A2 is 1:(0.05-0.2).

2. The low-temperature resistant special rubber cable material according to claim 1, characterized in that, The PE is LLDPE.

3. A method for preparing the low-temperature resistant special rubber cable material according to any one of claims 1-2, characterized in that, Includes the following steps: S1. Add SEBS thermoplastic elastomer, PP, PE, EPDM, NBR, modified calcium powder, white oil, antioxidant, plasticizer, vulcanizing agent and compatibilizer to a high-speed mixer and mix to obtain a premix; S2. Add the premix to a twin-screw extruder for melt blending, extrusion granulation, extrusion temperature of 180-220℃, screw speed of 100-200r / min, to obtain low-temperature resistant special rubber cable material.

4. The application of the low-temperature resistant special rubber cable material according to any one of claims 1-2, characterized in that, The low-temperature resistant special rubber cable material is used in BH-YC, BH-YCW, BH-YZ, BH-YZW, BH-YH cables, mining and marine cables, and port machinery cables.

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