Light swing-resistant cable for ABS wheel speed sensor

Abstract

The invention discloses a light swing-resistant cable for an ABS wheel speed sensor, and belongs to the technical field of cables. The invention discloses a light swing-resistant cable for an ABS wheel speed sensor. The light swing-resistant cable comprises a wheel speed sensor unit, an electric unit, a second light filling layer and an outer sheath layer, the wheel speed sensor unit comprises an insulated conductor part, a first sheath layer arranged outside the insulated conductor part, and a first light filling layer filled between the insulated conductor part and the first sheath layer; the first light filling layer and the second light filling layer are both provided with aramid fibers. The insulated conductor part comprises a conductor layer and an insulating layer wrapping the conductor layer; the conductor layer is formed by twisting copper wire conductors and aramid fibers; the first light filling layer and the second light filling layer are made of polyurethane foam; the outer sheath layer comprises the following raw material components: an organosilicon polyurethane elastomer, modified hollow glass microspheres, an antioxidant and a lubricant.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of light ABS wheel speed sensor cable for swing resistance. BACKGROUND

[0002] Wheel speed sensor as the key component in automotive electronic control system, is widely used in ABS (anti-lock braking system) and other safety systems, its performance directly influences the braking effect of vehicle, control stability and driving safety.Wheel speed sensor is connected with control unit by cable, is responsible for real-time transmission wheel speed signal, therefore, the reliability, stability and environmental adaptability of matched cable are higher requirements.

[0003] At present, ABS wheel speed sensor cable mostly uses PVC or ordinary rubber material as insulation and sheath material.Although this kind of material has the advantages of low cost, good processing performance etc., but in practical application, many problems are exposed.Firstly, since wheel speed sensor is usually installed in the position close to wheel, cable is under the action of dynamic stress such as vibration, bending and torsion during vehicle driving process.The flexibility of traditional material is poor, swing resistance is insufficient, easy to cause cable insulation layer cracking, conductor fracture and other phenomena, influence the continuity and accuracy of signal transmission, even cause system failure.Secondly, the overall quality of traditional cable is larger, is not conducive to the development trend of automobile lightweight design, increases the energy consumption of whole vehicle, is not suitable for the current energy saving and environmental protection requirements.

[0004] In addition, the running environment of automobile is complex and changeable, cable needs to work in the extreme temperature range of-40 ℃ to 125 ℃ for a long time.Ordinary PVC or rubber material is prone to material aging, embrittlement or softening in this temperature range, seriously affects the service life and working stability of cable.At the same time, with the continuous improvement of automobile safety standards, cable also needs to have good flame retardant performance to prevent fire spreading in fire accident.

[0005] Therefore, the applicant designs and prepares a kind of ABS wheel speed sensor special cable of light, high and low temperature resistance, flame retardant and excellent swing resistance, to meet the higher requirements of reliability, lightweight and safety in automobile industry. SUMMARY

[0006] The purpose of the present application is to provide a kind of light ABS wheel speed sensor cable for swing resistance, to solve the technical problems mentioned in the background in the above.

[0007] The technical scheme for achieving the purpose of the present application is:

[0008] The application discloses a light swing-resistant ABS wheel speed sensor cable, which comprises a wheel speed sensor unit, an electric unit, a second light filling layer and an outer sheath layer; the wheel speed sensor unit comprises an insulated conductor part, a first sheath layer arranged outside the insulated conductor part and a first light filling layer filled between the insulated conductor and the first sheath layer; the first light filling layer and the second light filling layer are both provided with aramid fibers.

[0009] The light swing-resistant ABS wheel speed sensor cable of the application reduces the mass of the light swing-resistant ABS wheel speed sensor cable by using the second light filling layer and the first light filling layer in the wheel speed sensor unit, and enhances the swing resistance of the light swing-resistant ABS wheel speed sensor cable by arranging the aramid fiber reinforcing rib in the first light filling layer and the second light filling layer.

[0010] Further, the insulated conductor part comprises a conductor layer and an insulating layer wrapped outside the conductor layer; the conductor layer is obtained by twisting a copper wire conductor and aramid fibers.

[0011] The conductor layer of the insulated conductor part of the wheel speed sensor unit of the application is obtained by twisting a copper wire conductor and aramid fibers, which can effectively improve the swing resistance and strength of the light swing-resistant ABS wheel speed sensor cable.

[0012] Further, the material of the first light filling layer and the second light filling layer is polyurethane foam.

[0013] The material of the first light filling layer and the second light filling layer of the application is polyurethane foam, which can effectively reduce the mass of the light swing-resistant ABS wheel speed sensor cable.

[0014] Further, the raw material components of the outer sheath layer comprise 100-120 mass parts of organic silicon polyurethane elastomer, 50-70 mass parts of modified hollow glass microspheres, 1-2 mass parts of antioxidant and 1-3 mass parts of lubricant.

[0015] The modified hollow glass microspheres are added in the outer sheath layer of the application, the density of the modified hollow glass microspheres is lower than that of the traditional fillers, the spherical structure of the modified hollow glass microspheres forms a light filling network in the outer sheath layer, the overall density of the material can be reduced, and the mass of the light ABS cable for a swing-resistant ABS wheel speed sensor can be further reduced. However, the hollow glass microspheres are prone to agglomeration in the organic silicon polyurethane elastomer and have poor compatibility and weak interfacial bonding force, which directly leads to the decrease of the mechanical properties of the outer sheath layer. The modified hollow glass microspheres are uniformly dispersed in the organic silicon polyurethane elastomer, the organic silicon polyurethane elastomer is coated outside the hollow glass microspheres to form a "core-shell" structure, stress can be effectively transferred, and crack propagation caused by stress concentration can be avoided, so that the mechanical properties of the outer sheath layer are improved, and the swing-resistant performance of the light ABS cable for a swing-resistant ABS wheel speed sensor is further enhanced.

[0016] Further, the organic silicon polyurethane elastomer is obtained by polymerization of isocyanate monomers, cold-resistant organic silicon diols, flame-retardant chain extenders and organic silicon chain extenders; the specific preparation steps are as follows: under nitrogen protection, 11-13 parts by mass of cold-resistant organic silicon diols and 0.05-0.055 parts by mass of dibutyltin dilaurate are added dropwise into 5-6 parts by mass of isocyanate monomers, then 18-20 parts by mass of tetrahydrofuran is added, and the mixture is reacted at 65-75 DEG C for 1.5-2.5 hours to obtain a prepolymer; then the prepolymer is cooled to 50 DEG C, 9-11 parts by mass of flame-retardant chain extenders dissolved in 20 parts by mass of tetrahydrofuran, 2-3 parts by mass of organic silicon chain extenders dissolved in 20 parts by mass of tetrahydrofuran and 0.05-0.055 parts by mass of dibutyltin dilaurate are added respectively, and the mixture is reacted at 65-75 DEG C for 9-11 hours, poured into a mold, left to stand overnight at room temperature, and vacuum dried to obtain the organic silicon polyurethane elastomer.

[0017] The isocyanate monomers include any one or at least two combinations of toluene diisocyanate, diphenyl methane diisocyanate, hexamethylene diisocyanate and isophorone diisocyanate.

[0018] The organic silicon polyurethane elastomer of the application is obtained by polymerization of isocyanate monomers, cold-resistant organic silicon diols, flame-retardant chain extenders and organic silicon chain extenders;

[0019] The cold-resistant organosilicon dihydric alcohol is obtained by ion ring-opening polymerization of octamethylcyclotetrasiloxane, tetramethyltetravinylcyclotetrasiloxane and a hydroxyl-containing disiloxane, and then grafting a terminal mercaptopolyether by click reaction, and the flexible polyether long chain is introduced on the side chain of the terminal hydroxyl polysiloxane, effectively destroying the molecular regularity of the terminal hydroxyl polysiloxane, hindering the ordered arrangement of the molecular chain at low temperature, and reducing the crystallization tendency, thereby enhancing the cold resistance of the cold-resistant organosilicon dihydric alcohol; the cold-resistant organosilicon dihydric alcohol is reacted with the isocyanate groups of the polyurethane prepolymer through the terminal hydroxyl groups to form a block structure connected by covalent bonds, thereby enhancing the interfacial bonding force; the long-chain polyether is embedded in the amorphous region of the polyurethane soft segment to form an interpenetrating network through chain segment entanglement, thereby reducing microphase separation, reducing the size of the hard segment microzone and making the distribution uniform, thereby improving the tensile strength; and the two-phase interface forms an energy dissipation network through the entanglement of the polyether chain, thereby absorbing vibration energy through molecular chain slippage under dynamic load, and further enhancing the swing resistance of the light-weight swing-resistant ABS wheel speed sensor cable;

[0020] The flame-retardant chain extender is obtained by reacting melamine with vanillin and then with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the organosilicon chain extender is obtained by click reaction of 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol; the flame-retardant chain extender introduces a rigid ring by introducing melamine, and uses the large steric hindrance of the rigid group to reduce the thermal motion of the molecular chain under heat, thereby reducing the thermal deformation of the organosilicon polyurethane elastomer at high temperature and improving its heat resistance; after reaction with vanillin, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is grafted onto the flame-retardant chain extender, and an inherently flame-retardant polyurethane is subsequently prepared;

[0021] The silicon-containing groups and low-thermal-conductivity hollow glass microspheres in the organosilicon polyurethane elastomer can form a special insulating silicon-oxygen layer and a glassy covering layer on the surface of the matrix during combustion, which can prevent the transfer of heat during combustion, play a dual role of heat insulation and shielding, effectively prevent the oxidation of the carbon layer, and increase the thermal stability of the carbon layer; the phosphorus-containing groups decompose at high temperature to produce pyrophosphoric acid and metaphosphoric acid and other substances, which can also catalyze the formation of a more compact carbon layer to protect the matrix, and the decomposition of the phosphorus-containing groups can produce PO·, HPO·, PO2· and other free radicals to combine with H· and OH· free radicals in the air to quench the combustion reaction; in addition, melamine will decompose some non-combustible gases such as ammonia and carbon dioxide when heated, which can dilute the combustible gas and dilute the oxygen concentration in the combustion zone, thereby preventing the combustion reaction from continuing, and the organosilicon polyurethane elastomer prepared by the present application can significantly improve the flame-retardant performance of the polyurethane foam system through the synergistic effect of the hollow glass microspheres, organosilicon, melamine and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide;

[0022] The organic silicon chain extender is obtained by click reaction of 1,3-bis(vinyl)-tetramethyl disiloxane and 2-mercaptoethanol. The disiloxane structure and thioether bond in the organic silicon chain extender promote the compatibility between the hard phase and the soft phase, relieve the sharp microphase separation between the hard phase and the soft phase, facilitate the stress transmission between the hard phase and the soft phase, and greatly improve the mechanical properties of the organic silicon polyurethane elastomer.

[0023] Further, the cold-resistant organic silicon diol is obtained by grafting terminal mercapto polyether to the polyether obtained by ion ring-opening polymerization of octamethylcyclotetrasiloxane, tetramethyltetravinylcyclotetrasiloxane and hydroxyl-containing disiloxane. The specific preparation steps are as follows: under nitrogen protection, 1.5 parts by mass of tetramethylammonium hydroxide and 150 parts by mass of octamethylcyclotetrasiloxane are reacted at 75-85°C under a vacuum degree of -0.095 to -0.1 MPa for 5-7 h to obtain tetramethylammonium silanol salt; 100-120 parts by mass of octamethylcyclotetrasiloxane and 20-25 parts by mass of tetramethyltetravinylcyclotetrasiloxane are dehydrated at 75-85°C under a vacuum degree of -0.095 to -0.1 MPa for 1-3 h, then 0.8-1 part by mass of tetramethylammonium silanol salt and 0.05-0.1 part by mass of hydroxyl-containing disiloxane are added under a nitrogen atmosphere, the temperature is raised to 110-120°C, and reaction is carried out for 2-4 h, then the temperature is raised to 170-190°C, and vacuum is maintained for 2-4 h, and the mixture is cooled to room temperature to obtain vinyl silica gel; 100 parts by mass of the vinyl silica gel are dissolved in 20-30 times its mass of tetrahydrofuran, and stirred for 11-12 h, then 30-40 parts by mass of terminal mercapto polyether are added, and stirred for 1-3 h, then 1.3-1.5 parts by mass of benzpinacol are added, and the mixture is stirred and reacted under irradiation of a 365 nm ultraviolet lamp for 15-20 min to obtain the cold-resistant organic silicon diol.

[0024] The hydroxyl-containing disiloxane includes 1,3-bis(3-hydroxypropyl)-1,1,3,3-tetramethyldisiloxane.

[0025] The terminal mercapto polyether includes methoxypolyethylene glycol-mercapto.

[0026] The flame-retardant chain extender is obtained by reaction of melamine with vanillin, and then with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. The specific preparation steps are as follows: under nitrogen protection, 25-35 parts by mass of vanillin are dissolved in 80-100 parts by mass of methanol to obtain solution A; 12-13 parts by mass of melamine are dissolved in 80-100 parts by mass of methanol to obtain solution B; solution B is added dropwise to solution A within 30 min, and reaction is carried out at 60-70°C for 5-7 h, then 43-44 parts by mass of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is added, and reaction is carried out at 60-70°C for 11-13 h to obtain the flame-retardant chain extender.

[0027] The organic silicon chain extender is obtained by click reaction of 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol, and the specific preparation steps are as follows: under nitrogen protection, 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol are mixed in a molar ratio of 1:2-2.2, then 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol are added, and 0.01-0.015 times the mass of benzoin dimethyl ether is stirred under irradiation of a 365 nm ultraviolet lamp for 15-25 min to obtain the organic silicon chain extender.

[0028] The modified hollow glass microspheres are obtained by modifying the hollow glass microspheres with a silane coupling agent, and the specific preparation steps are as follows: the hollow glass microspheres are stirred in a 0.5M sodium hydroxide solution for 1-3h, then washed with distilled water until the washing liquid is neutral, and dried to obtain the surface-hydroxylated hollow glass microspheres; 110-120 parts by mass of ethanol and 10 parts by mass of ultrapure water are stirred uniformly, then acetic acid is added to adjust the pH of the aqueous solution to 5-6, 0.5-0.6 parts by mass of a silane coupling agent is added, hydrolysis is carried out for 50-70 min, then 50 parts by mass of the surface-hydroxylated hollow glass microspheres are added, constant-temperature reflux is carried out at 55-65℃ for 4.5-5.5h, after the temperature is reduced to room temperature, filtration is carried out, the obtained product is washed with ethanol three times, and dried to obtain the modified hollow glass microspheres.

[0029] The silane coupling agent is obtained by grafting an olefin bond-containing siloxane with a mercapto reagent through click reaction, and the specific preparation steps are as follows: 15-25 parts by mass of the olefin bond-containing siloxane is dissolved in 300-400 parts by mass of tetrahydrofuran, then 18-30 parts by mass of the mercapto reagent is added and stirred for 1-3h, then 1.7-3.4 parts by mass of benzoin dimethyl ether is added and stirred under irradiation of an ultraviolet lamp for 15-20 min to obtain the silane coupling agent.

[0030] The olefin bond-containing siloxane includes vinyltrimethoxysilane, vinyltriethoxysilane, allyltriethoxysilane, etc.

[0031] The mercapto reagent includes mercaptoethyl acetate, mercaptoacetic acid, and mercapto glycerol.

[0032] The ultraviolet lamp is a 365 nm, 140-150 mW / cm 2 ultraviolet lamp.

[0033] By adopting the technical scheme, the present application has the following beneficial effects:

[0034] (1) The lightweight anti-swing ABS wheel speed sensor cable of the present application reduces the mass of the lightweight anti-swing ABS wheel speed sensor cable by using a second lightweight filler layer and a first lightweight filler layer in the wheel speed sensor unit, and at the same time, the reinforcing rib aramid fiber is arranged in the first lightweight filler layer and the second lightweight filler layer to enhance the anti-swing performance of the lightweight anti-swing ABS wheel speed sensor cable.

[0035] (2) The conductor layer of the insulating conductor part of the wheel speed sensor unit of the present application adopts copper wire conductor twisted with aramid fiber, which can effectively improve the anti-swing performance and strength of the lightweight anti-swing ABS wheel speed sensor cable.

[0036] (3) The first lightweight filler layer and the second lightweight filler layer of the present application both use polyurethane foam, which can effectively reduce the mass of the lightweight anti-swing ABS wheel speed sensor cable.

[0037] (4) The modified hollow glass microspheres are added in the outer sheath layer of the present application, and the density of the modified hollow glass microspheres is lower than that of the traditional fillers. The spherical structure of the modified hollow glass microspheres forms a lightweight filling network in the outer sheath layer, which can reduce the overall density of the material and further reduce the mass of the lightweight anti-swing ABS wheel speed sensor cable. However, the hollow glass microspheres are prone to agglomeration in the organic silicon polyurethane elastomer and have poor compatibility and weak interfacial bonding force, which directly leads to the decrease of the mechanical properties of the outer sheath layer. The modification of the hollow glass microspheres can uniformly disperse the hollow glass microspheres in the organic silicon polyurethane elastomer, and the organic silicon polyurethane elastomer forms a "core-shell" structure by coating the hollow glass microspheres, which can effectively transfer stress and avoid crack propagation caused by stress concentration, thereby improving the mechanical properties of the outer sheath layer and enhancing the anti-swing performance of the lightweight anti-swing ABS wheel speed sensor cable.

[0038] (5) The organic silicon polyurethane elastomer of the present application is obtained by polymerization of isocyanate monomer, cold-resistant organic silicon dihydric alcohol, flame-retardant chain extender, and organic silicon chain extender;

[0039] The cold-resistant organosilicon dihydric alcohol is obtained by ion ring-opening polymerization of octamethylcyclotetrasiloxane, tetramethyltetravinylcyclotetrasiloxane and a hydroxyl-containing disiloxane, and then grafting a terminal mercaptopolyether by click reaction, and the flexible polyether long chain is introduced on the side chain of the terminal hydroxyl polysiloxane, effectively destroying the molecular regularity of the terminal hydroxyl polysiloxane, hindering the ordered arrangement of the molecular chain at low temperature, and reducing the crystallization tendency, thereby enhancing the cold resistance of the cold-resistant organosilicon dihydric alcohol; the cold-resistant organosilicon dihydric alcohol is reacted with the isocyanate groups of the polyurethane prepolymer through the terminal hydroxyl groups to form a block structure connected by covalent bonds, thereby enhancing the interfacial bonding force; the long-chain polyether is embedded in the amorphous region of the polyurethane soft segment to form an interpenetrating network through chain segment entanglement, thereby reducing microphase separation, reducing the size of the hard segment microzone and making the distribution uniform, thereby improving the tensile strength; and the two-phase interface forms an energy dissipation network through the entanglement of the polyether chain, thereby absorbing vibration energy through molecular chain slippage under dynamic load, and further enhancing the swing resistance of the light-weight swing-resistant ABS wheel speed sensor cable;

[0040] The flame-retardant chain extender is obtained by reacting melamine with vanillin and then with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the organosilicon chain extender is obtained by click reaction of 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol; the flame-retardant chain extender introduces a rigid ring by introducing melamine, and uses the large steric hindrance of the rigid group to reduce the thermal motion of the molecular chain under heat, thereby reducing the thermal deformation of the organosilicon polyurethane elastomer at high temperature and improving its heat resistance; after reaction with vanillin, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is grafted onto the flame-retardant chain extender, and an inherently flame-retardant polyurethane is subsequently prepared;

[0041] The silicon-containing groups and low-thermal-conductivity hollow glass microspheres in the organosilicon polyurethane elastomer can form a special insulating silicon-oxygen layer and a glassy covering layer on the surface of the matrix during combustion, which can block the transfer of heat during combustion, play a dual role of heat insulation and shielding, effectively prevent the oxidation of the carbon layer, and increase the thermal stability of the carbon layer; the phosphorus-containing groups decompose at high temperature to produce pyrophosphoric acid and metaphosphoric acid and other substances, which can also catalyze the formation of a more compact carbon layer to protect the interior of the matrix, and the decomposition of the phosphorus-containing groups can generate PO·, HPO·, PO2· and other free radicals to combine with H· and OH· free radicals in the air to quench the combustion reaction; in addition, melamine will decompose some non-combustible gases such as ammonia and carbon dioxide when heated, which can dilute the combustible gas and dilute the oxygen concentration in the combustion zone, thereby preventing the combustion reaction from continuing, and the organosilicon polyurethane elastomer prepared by the present application can significantly improve the flame-retardant performance of the polyurethane foam system through the synergistic effect of the hollow glass microspheres, organosilicon, melamine and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide;

[0042] The organic silicon chain extender is obtained by click reaction of 1,3-bis(vinyl)-tetramethyl disiloxane and 2-mercaptoethanol, and the disiloxane structure and thioether bond in the organic silicon chain extender promote the compatibility between the hard phase and the soft phase, relieve the sharp microphase separation between the hard phase and the soft phase, facilitate the stress transmission between the hard phase and the soft phase, and greatly improve the mechanical properties of the organic silicon polyurethane elastomer. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to make the content of the present application more easily understood, the present application will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, in which

[0044] Figure 1 The structure diagram of a light ABS wheel speed sensor cable according to an embodiment of the present application.

[0045] The reference signs in the drawings are: an electric unit 1, a wheel speed sensor unit 2, an insulated conductor part 2-1, a conductor layer 2-1-1, an insulating layer 2-1-2, a first light filling layer 2-2, a first sheath layer 2-3, a second light filling layer 3, and an outer sheath layer 4. DETAILED DESCRIPTION

[0046] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, 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 application.

[0049] It should be noted that: similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0050] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In the description of the embodiments of the present application, it should be understood that the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The present application will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0052] The hollow glass microspheres are provided by 3M Company, model iM30K; the average diameter is 18 μm, the density is 0.6 g / cm 3 , and the ball wall thickness is 0.9 μm.

[0053] The isocyanate monomer is diphenylmethane diisocyanate.

[0054] The antioxidant is antioxidant 1010.

[0055] The lubricant is glyceryl stearate.

[0056] The ultraviolet lamp is a 365 nm, 140-150 mW / cm 2 ultraviolet lamp.

[0057] The molecular weight of bis-hydroxyethoxypropyl dimethicone is 2500.

[0058] The molecular weight of methoxy polyethylene glycol-thiol is 2000.

[0059] Example 1

[0060] See Figure 1A kind of light swing-resistant ABS wheel speed sensor cable, including wheel speed sensor unit 2, electric unit 1, second light filling layer 3, outer sheath layer 4;Two electric units 1 are provided with electric unit 1 and wheel speed sensor unit 2 outside with outer sheath layer 4, outer sheath layer 4, electric unit 1 and wheel speed sensor unit 2 are filled with second light filling layer 3 between;

[0061] The electric unit 1 includes an electric unit conductor and an electric unit insulating layer wrapped outside the electric unit conductor.

[0062] The wheel speed sensor unit 2 includes an insulating conductor part 2-1, a first sheath layer 2-3 disposed outside the insulating conductor part 2-1, and a first light filling layer 2-2 filled between the insulating conductor 2-1 and the first sheath layer 2-3.

[0063] The insulating conductor part 2-1 includes a conductor layer 2-1-1 and an insulating layer 2-1-2 wrapped outside the conductor layer;The conductor layer 2-1-1 is obtained by twisting 28 copper wire conductors with a single wire diameter of 0.15 mm outside a 1000D aramid fiber as a central reinforcing core.

[0064] The materials of the first light filling layer 2-2 and the second light filling layer 3 are both polyurethane foam, and at least one reinforcing rib aramid fiber is arranged in the first light filling layer 2-2 and the second light filling layer 3.

[0065] The preparation steps of the outer sheath layer 4 are as follows: 100 parts by mass of silicone polyurethane elastomer, 50 parts by mass of modified hollow glass microspheres, 1 part by mass of antioxidant, and 1 part by mass of lubricant are put into a double screw extruder for melt blending, and then extruded outside the second light filling layer. From the feeding end to the die opening, the temperature of the extruder barrel is controlled in 8 segments, and the temperature parameters are 160℃, 170℃, 180℃, 190℃, 200℃, 190℃, 180℃, and 175℃ in turn. The screw speed is 100 r / min.

[0066] The specific preparation steps of the silicone polyurethane elastomer are as follows: under nitrogen protection, 11 parts by mass of cold-resistant silicone diol and 0.05 parts by mass of dibutyltin dilaurate are added dropwise into 5 parts by mass of isocyanate monomer, then 18-20 parts by mass of tetrahydrofuran is added, and the reaction is carried out at 65℃ for 1.5h to obtain a prepolymer;Then the prepolymer is cooled to 50℃, and 9 parts by mass of flame-retardant chain extender dissolved in 20 parts by mass of tetrahydrofuran, 2 parts by mass of silicone chain extender dissolved in 20 parts by mass of tetrahydrofuran, and 0.05 parts by mass of dibutyltin dilaurate are added respectively, and the reaction is carried out at 65℃ for 9h, then poured into a mold and left overnight at room temperature, and then vacuum dried to obtain the silicone polyurethane elastomer.

[0067] The specific preparation steps of the cold-resistant organosilicon diol are as follows: under nitrogen protection, 1.5 parts by mass of tetramethylammonium hydroxide and 150 parts by mass of octamethylcyclotetrasiloxane are reacted at 75°C under a vacuum degree of-0.095 MPa for 5 h to prepare tetramethylammonium silanolate; 100 parts by mass of octamethylcyclotetrasiloxane and 20 parts by mass of tetramethyltetravinylcyclotetrasiloxane are dehydrated at 75°C under a vacuum degree of-0.095 MPa for 1 h, then 0.8 parts by mass of tetramethylammonium silanolate and 0.05 parts by mass of 1,3-bis(3-hydroxypropyl)-1,1,3,3-tetramethyldisiloxane are added under a nitrogen atmosphere, the temperature is raised to 110°C for reaction for 2 h, then the temperature is raised to 170°C and kept for 2 h under a vacuum state, and the temperature is cooled to room temperature to obtain vinyl silica gel; 100 parts by mass of the vinyl silica gel is dissolved in 23 times the mass of the vinyl silica gel of tetrahydrofuran and stirred for 11 h, then 30 parts by mass of a methoxy-terminated polyethylene glycol-thiol is added and stirred for 1 h, then 1.3 parts by mass of benzpinacol is added and stirred for reaction for 15 min under irradiation of a 365 nm ultraviolet lamp to obtain the cold-resistant organosilicon diol.

[0068] The specific preparation steps of the organosilicon chain extender are as follows: under nitrogen protection, 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol are mixed at a molar ratio of 1:2, then 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol and 0.01 times the mass of benzpinacol are added and stirred for reaction for 15 min under irradiation of an ultraviolet lamp to obtain the organosilicon chain extender.

[0069] The specific preparation steps of the modified hollow glass microspheres are as follows: hollow glass microspheres are stirred in a 0.5M sodium hydroxide solution for 1 h, then washed with distilled water until the washing liquid is neutral, and dried to obtain surface-hydroxylated hollow glass microspheres; 110 parts by mass of ethanol and 10 parts by mass of ultrapure water are stirred uniformly, then acetic acid is added to adjust the pH of the aqueous solution to 5, 0.5 parts by mass of a silane coupling agent is added, and hydrolysis is performed for 50 min, then 50 parts by mass of the surface-hydroxylated hollow glass microspheres are added, constant-temperature reflux is performed at 55°C for 4.5 h, the temperature is lowered to room temperature, then filtration is performed, the hollow glass microspheres are washed with ethanol three times, and drying is performed to obtain the modified hollow glass microspheres.

[0070] The specific preparation steps of the silane coupling agent are as follows: 15 parts by mass of an olefin bond-containing siloxane is dissolved in 300 parts by mass of tetrahydrofuran, then 18 parts by mass of mercaptoacetic acid methyl ester is added and stirred for 1 h, then 1.7 parts by mass of benzpinacol is added and stirred for reaction for 15 min under irradiation of an ultraviolet lamp to obtain the silane coupling agent.

[0071] Example 2

[0072] The structure of the light weight anti-oscillation ABS wheel speed sensor cable of example 2 is the same as that of example 1, except that the preparation steps of the outer sheath layer 4 are as follows: 110 parts by mass of silicone polyurethane elastomer, 60 parts by mass of modified hollow glass microspheres, 1.5 parts by mass of antioxidant, and 2 parts by mass of lubricant are put into a double screw extruder for melt blending, and then extruded outside the second light weight filler layer to obtain the outer sheath layer 4. The temperature parameters of the eight temperature control sections of the extruder barrel from the feeding end to the die are 160℃, 170℃, 180℃, 190℃, 200℃, 190℃, 180℃, and 175℃, respectively, and the screw rotation speed is 100 r / min.

[0073] The specific preparation steps of the silicone polyurethane elastomer are as follows: under nitrogen protection, 12 parts by mass of cold-resistant silicone diol and 0.053 parts by mass of dibutyltin dilaurate are added dropwise into 5.5 parts by mass of isocyanate monomer, then 19 parts by mass of tetrahydrofuran is added, and the reaction is carried out at 70℃ for 2h to obtain a prepolymer; then the prepolymer is cooled to 50℃, and 10 parts by mass of flame-retardant chain extender dissolved in 20 parts by mass of tetrahydrofuran, 2.5 parts by mass of silicone chain extender dissolved in 20 parts by mass of tetrahydrofuran, and 0.053 parts by mass of dibutyltin dilaurate are added respectively, and the reaction is carried out at 70℃ for 10h; the mixture is poured into a mold and left to stand overnight at room temperature, and then vacuum dried to obtain the silicone polyurethane elastomer.

[0074] The specific preparation steps of the cold-resistant silicone diol are as follows: under nitrogen protection, 1.5 parts by mass of tetramethylammonium hydroxide and 150 parts by mass of octamethylcyclotetrasiloxane are reacted at 80℃ under a vacuum degree of-0.095MPa for 6h to obtain tetramethylammonium silanol salt; 110 parts by mass of octamethylcyclotetrasiloxane and 23 parts by mass of tetramethyltetravinylcyclotetrasiloxane are dehydrated at 80℃ under a vacuum degree of-0.095MPa for 2h, and then 0.9 parts by mass of tetramethylammonium silanol salt and 0.08 parts by mass of 1,3-bis(3-hydroxypropyl)-1,1,3,3-tetramethyldisiloxane are added under nitrogen atmosphere, and the reaction is carried out at 115℃ for 3h, and then at 180℃ for 3h under vacuum, and then cooled to room temperature to obtain vinyl silica gel; 100 parts by mass of the vinyl silica gel is dissolved in 28 times its mass of tetrahydrofuran and stirred for 12h, and then 35 parts by mass of methoxy-terminated polyethylene glycol-thiol is added and stirred for 2h, and then 1.4 parts by mass of benzpinacol is added and stirred for 20min under irradiation of a 365nm ultraviolet lamp to obtain the cold-resistant silicone diol.

[0075] The specific preparation steps of the organic silicon chain extender are as follows: under nitrogen protection, 1,3-bis(vinyl)-tetramethyl disiloxane is mixed with 2-mercaptoethanol at a molar ratio of 1:2.1, then 1,3-bis(vinyl)-tetramethyl disiloxane and 2-mercaptoethanol are added with 0.013 times the mass of benzoin dimethyl ether, and the mixture is stirred under irradiation of a 365 nm ultraviolet lamp for 20 min to obtain the organic silicon chain extender.

[0076] The specific preparation steps of the modified hollow glass microspheres are as follows: hollow glass microspheres are stirred in a 0.5M sodium hydroxide solution for 2h, then washed with distilled water until the washing liquid is neutral, and dried to obtain surface-hydroxylated hollow glass microspheres; 115 parts by mass of ethanol and 10 parts by mass of ultrapure water are stirred uniformly, then acetic acid is added to adjust the pH of the aqueous solution to 5.5, 0.58 parts by mass of a silane coupling agent is added, and the mixture is hydrolyzed for 60 min, then 50 parts by mass of the surface-hydroxylated hollow glass microspheres are added, and the mixture is refluxed at a constant temperature of 60°C for 5h, after the temperature is lowered to room temperature, the mixture is filtered, washed with ethanol three times, and dried to obtain the modified hollow glass microspheres.

[0077] The specific preparation steps of the silane coupling agent are as follows: 20 parts by mass of an olefin bond-containing siloxane is dissolved in 350 parts by mass of tetrahydrofuran, then 19 parts by mass of mercaptoacetic acid methyl ester is added and stirred for 2h, then 3.4 parts by mass of benzoin dimethyl ether is added and the mixture is stirred under irradiation of an ultraviolet lamp for 20 min to obtain the silane coupling agent.

[0078] Example 3

[0079] Example 3 has the same structure as the light-weight anti-swing ABS wheel speed sensor cable of Example 1, except that the preparation steps of the outer sheath layer 4 are as follows: 120 parts by mass of an organic silicon polyurethane elastomer, 70 parts by mass of modified hollow glass microspheres, 2 parts by mass of an antioxidant, and 3 parts by mass of a lubricant are put into a twin-screw extruder for melt blending, and then extruded outside the second light-weight filler layer to obtain the outer sheath layer 4; the temperature of the extruder barrel is controlled at 8 segments from the feeding end to the die, and the temperature parameters are 160°C, 170°C, 180°C, 190°C, 200°C, 190°C, 180°C, and 175°C, respectively; and the screw rotation speed is 100 r / min.

[0080] The specific preparation steps of the organic silicon polyurethane elastomer are as follows: under nitrogen protection, 13 parts by mass of the cold-resistant organic silicon diol and 0.055 parts by mass of dibutyltin dilaurate are added dropwise into 6 parts by mass of the isocyanate monomer, then 20 parts by mass of tetrahydrofuran is added, and the mixture is reacted at 75°C for 2.5 hours to obtain a prepolymer; then the prepolymer is cooled to 50°C, 11 parts by mass of the flame-retardant chain extender dissolved in 20 parts by mass of tetrahydrofuran, 3 parts by mass of the organic silicon chain extender dissolved in 20 parts by mass of tetrahydrofuran, and 0.055 parts by mass of dibutyltin dilaurate are added, respectively, the mixture is reacted at 75°C for 11 hours, and the mixture is poured into a mold and left to stand overnight at room temperature, and then vacuum dried to obtain the organic silicon polyurethane elastomer.

[0081] The specific preparation steps of the cold-resistant organic silicon diol are as follows: under nitrogen protection, 1.5 parts by mass of tetramethylammonium hydroxide and 150 parts by mass of octamethylcyclotetrasiloxane are reacted at 85°C under a vacuum degree of -0.1 MPa for 7 hours to obtain a tetramethylammonium hydroxide silanol salt; 120 parts by mass of octamethylcyclotetrasiloxane and 25 parts by mass of tetramethyltetravinylcyclotetrasiloxane are dehydrated at 85°C under a vacuum degree of -0.1 MPa for 3 hours, then 1 part by mass of the tetramethylammonium hydroxide silanol salt and 0.1 parts by mass of 1,3-bis(3-hydroxypropyl)-1,1,3,3-tetramethyldisiloxane are added under a nitrogen atmosphere, the mixture is heated to 120°C and reacted for 4 hours, then the mixture is heated to 190°C and kept in a vacuum state for 4 hours, and then the mixture is cooled to room temperature to obtain a vinyl silica gel; 100 parts by mass of the vinyl silica gel is dissolved in 30 times the mass of tetrahydrofuran, stirred for 12 hours, then 40 parts by mass of a methoxy-terminated polyethylene glycol-thiol is added and stirred for 3 hours, then 1.5 parts by mass of benzpinacol is added, and the mixture is stirred and reacted under irradiation of a 365 nm ultraviolet lamp for 20 minutes to obtain the cold-resistant organic silicon diol.

[0082] The specific preparation steps of the organic silicon chain extender are as follows: under nitrogen protection, 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol are mixed at a molar ratio of 1:2.2, then 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol and 0.015 times the mass of benzpinacol are added, and the mixture is stirred and reacted under irradiation of a 365 nm ultraviolet lamp for 25 minutes to obtain the organic silicon chain extender.

[0083] The specific preparation steps of the modified hollow glass microspheres are as follows: the hollow glass microspheres are stirred in a 0.5M sodium hydroxide solution for 3h, then washed with distilled water until the washing liquid is neutral, dried, and the surface hydroxylated hollow glass microspheres are obtained; 120 parts by mass of ethanol and 10 parts by mass of ultrapure water are stirred uniformly, then acetic acid is added to adjust the pH of the aqueous solution to 5.5, 0.6 parts by mass of a silane coupling agent is added, hydrolysis is carried out for 70min, then 50 parts by mass of the surface hydroxylated hollow glass microspheres are added, refluxed at 65℃ for 5.5h, after the temperature is reduced to room temperature, filtration is carried out, washed with ethanol three times, and dried to obtain the modified hollow glass microspheres.

[0084] The specific preparation steps of the silane coupling agent are as follows: 25 parts by mass of siloxane containing an olefin bond is dissolved in 400 parts by mass of tetrahydrofuran, then 30 parts by mass of mercaptoacetic acid methyl ester is added and stirred for 3h, then 3.4 parts by mass of benzoin dimethyl ether is added and stirred under ultraviolet lamp irradiation for 20min to obtain the silane coupling agent.

[0085] Comparative Example 1

[0086] The difference between Comparative Example 1 and Example 2 is that the raw material components of the outer sheath layer 4 include 110 parts by mass of a silicone polyurethane elastomer, 60 parts by mass of hollow glass microspheres, 1.5 parts by mass of an antioxidant, and 2 parts by mass of a lubricant, and the rest of the structure, steps, and components are the same as those of Example 2.

[0087] Comparative Example 2

[0088] The difference between Comparative Example 2 and Example 2 is that the silicone polyurethane elastomer is obtained only by polymerization of isocyanate monomers, bis-hydroxyethoxypropyl polydimethylsiloxane, flame-retardant chain extender, and silicone chain extender, and the rest of the structure, steps, and components are the same as those of Example 2.

[0089] Comparative Example 3

[0090] The difference between Comparative Example 3 and Example 2 is that the silicone polyurethane elastomer is obtained only by polymerization of isocyanate monomers, cold-resistant silicone diol, and silicone chain extender, and the rest of the structure, steps, and components are the same as those of Example 2.

[0091] Effect Example

[0092] Rattling resistance test conditions: 75N weight, bending radius R120mm, ±90°, 30 times / min, length 600mm, and the rattling times are recorded.

[0093] High temperature resistance test: the outer sheath layers of Examples 1-3 and Comparative Examples 1-3 are placed in an oven at 180℃ for 1000 hours according to Outer Sheath GB / T39560.3-2021, and the retention rates of insulation tensile strength and elongation at break before and after aging are detected.

[0094] The following Table 1 is the performance test results of the light swing-resistant ABS wheel speed sensor cable and the outer sheath layer of Examples 1-3 and Comparative Examples 1-3 of the present application:

[0095] Table 1

[0096]

[0097]

[0098] From the above Table 1, it can be seen that the light swing-resistant ABS wheel speed sensor cable of Examples 1-3 has good swing resistance, and the outer sheath layer has good flame retardance, high and low temperature resistance, and mechanical properties. The retention rate of the insulation tensile strength is still as high as 80% and the retention rate of the elongation at break is still as high as 70% after aging at 180°C for 1000h, and the high temperature resistance is good. The swing number at room temperature is as high as 50 million times, and the swing number at -60°C is still as high as 5 million times, and the swing resistance and low temperature resistance are both good.

[0099] The difference between Comparative Example 1 and Example 2 is that the outer sheath layer 4 uses hollow glass microspheres instead of modified hollow glass microspheres. Due to the agglomeration of the hollow glass microspheres, the swing resistance of the cable and the high and low temperature resistance and mechanical properties of the outer sheath layer are all worse than those of the example.

[0100] The difference between Comparative Example 2 and Example 2 is that the organic silicone polyurethane elastomer polyol monomer uses bis-hydroxyethoxypropyl polydimethylsiloxane instead of cold-resistant organic silicone diol. The swing resistance of the cable and the high and low temperature resistance and mechanical properties of the outer sheath layer are all worse than those of the example.

[0101] The difference between Comparative Example 3 and Example 2 is that the organic silicone polyurethane elastomer does not add a flame-retardant chain extender. The high temperature resistance, flame retardance, and mechanical properties of the outer sheath layer are all worse than those of the example.

[0102] The above-described specific examples further detail the purpose, technical solutions, and beneficial effects of the present application. It should be understood that the above-described specific examples are merely examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of protection of the present application.

Claims

1. A lightweight, sway-resistant cable for ABS wheel speed sensors, characterized in that, The device includes a wheel speed sensor unit (2), an electrical unit (1), a second lightweight filler layer (3), and an outer sheath layer (4). The wheel speed sensor unit (2) includes an insulating conductor part (2-1), a first sheath layer (2-3) disposed outside the insulating conductor part (2-1), and a first lightweight filler layer (2-2) filled between the insulating conductor (2-1) and the first sheath layer (2-3). Both the first lightweight filler layer (2-2) and the second lightweight filler layer (3) are provided with aramid fibers.

2. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 1, characterized in that, The insulating conductor portion (2-1) includes a conductor layer (2-1-1) and an insulating layer (2-1-2) wrapped around the conductor layer; the conductor layer (2-1-1) is obtained by twisting copper wire conductors and aramid fibers.

3. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 1, characterized in that, The first lightweight filler layer (2-2) and the second lightweight filler layer (3) are both made of polyurethane foam.

4. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 1, characterized in that, The raw material components of the outer sheath layer (4) include, by mass, 100-120 parts of silicone polyurethane elastomer, 50-70 parts of modified hollow glass microspheres, 1-2 parts of antioxidant, and 1-3 parts of lubricant.

5. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 4, characterized in that, The preparation steps of the organosilicon polyurethane elastomer are as follows: Under nitrogen protection, 11-13 parts by mass of cold-resistant organosilicon diol and 0.05-0.055 parts by mass of dibutyltin dilaurate are added dropwise to 5-6 parts by mass of isocyanate monomer, followed by the addition of 18-20 parts by mass of tetrahydrofuran. The reaction is carried out at 65-75℃ for 1.5-2.5 h to obtain a prepolymer. The prepolymer is then cooled to 50℃ and 9-11 parts by mass of flame retardant chain extender dissolved in 20 parts by mass of tetrahydrofuran, 2-3 parts by mass of organosilicon chain extender dissolved in 20 parts by mass of tetrahydrofuran, and 0.05-0.055 parts by mass of dibutyltin dilaurate are added. The reaction is carried out at 65-75℃ for 9-11 h. The mixture is poured into a mold and left to stand at room temperature overnight. It is then vacuum dried to obtain the organosilicon polyurethane elastomer.

6. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 5, characterized in that, The preparation steps of the cold-resistant organosilicon diol are as follows: Under nitrogen protection, 1.5 parts by mass of tetramethylammonium hydroxide and 150 parts by mass of octamethylcyclotetrasiloxane are reacted at 75-85°C under a vacuum of -0.095 to -0.1 MPa for 5-7 hours to prepare tetramethylammonium hydroxide silanolate; 100-120 parts by mass of octamethylcyclotetrasiloxane and 20-25 parts by mass of tetramethyltetravinylcyclotetrasiloxane are weighed and dehydrated at 75-85°C under a vacuum of -0.095 to -0.1 MPa for 1-3 hours, and then 0.8-1 parts by mass of... A mixture of tetramethylammonium hydroxide silanolyl and 0.05–0.1 parts by weight of hydroxyl-containing disiloxane is heated to 110–120°C and reacted for 2–4 hours. Then, the temperature is raised to 170–190°C and maintained under vacuum for 2–4 hours. After cooling to room temperature, vinyl silica gel is obtained. 100 parts by weight of vinyl silica gel are dissolved in 20–30 times its mass of tetrahydrofuran and stirred for 11–12 hours. Then, 30–40 parts by weight of terminal thiol polyether is added and stirred for 1–3 hours. Next, 1.3–1.5 parts by weight of benzoin dimethyl ether is added and stirred under ultraviolet light for 15–20 minutes to obtain a cold-resistant organosilicon diol.

7. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 5, characterized in that, The preparation steps of the flame retardant chain extender are as follows: Under nitrogen protection, 25-35 parts by mass of vanillin are dissolved in 80-100 parts by mass of methanol to obtain solution A; 12-13 parts by mass of melamine are dissolved in 80-100 parts by mass of methanol to obtain solution B; solution B is added dropwise to solution A within 30 minutes, and the reaction is carried out at 60-70°C for 5-7 hours; then 43-44 parts by mass of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide are added, and the reaction is carried out at 60-70°C for 11-13 hours to obtain the flame retardant chain extender.

8. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 5, characterized in that, The preparation steps of the organosilicon chain extender are as follows: Under nitrogen protection, 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol are mixed at a molar ratio of 1:2 to 2.

2. Then, 0.01 to 0.015 times the mass of 1,3-bis(vinyl)-tetramethyldisiloxane and 2-mercaptoethanol and benzoin dimethyl ether are added and the mixture is stirred and reacted under 365nm ultraviolet light for 15 to 25 minutes to obtain the organosilicon chain extender.

9. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 4, characterized in that, The preparation steps of the modified hollow glass microspheres are as follows: Hollow glass microspheres are stirred in sodium hydroxide solution for 1–3 h, then washed with distilled water until the pH of the washing solution is neutral, and dried to obtain surface-hydroxylated hollow glass microspheres; 110–120 parts by mass of ethanol and 10 parts by mass of ultrapure water are stirred evenly, and acetic acid is added to adjust the pH of the aqueous solution to 5–6. 0.5–0.6 parts by mass of silane coupling agent are added, and hydrolysis is performed for 50–70 min. Then, 50 parts by mass of surface-hydroxylated hollow glass microspheres are added, and the mixture is refluxed at 55–65 °C for 4.5–5.5 h. After the temperature drops to room temperature, the mixture is filtered, washed three times with ethanol, and dried to obtain modified hollow glass microspheres.

10. The lightweight, sway-resistant ABS wheel speed sensor cable according to claim 9, characterized in that, The preparation steps of the silane coupling agent are as follows: 15-25 parts by mass of siloxane containing olefin bonds are dissolved in 300-400 parts by mass of tetrahydrofuran, then 18-30 parts by mass of mercapto reagent are added and stirred for 1-3 hours, followed by 1.7-3.4 parts by mass of benzoin dimethyl ether and stirred under ultraviolet light for 15-20 minutes to obtain the silane coupling agent.

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