WO2020133736A1 - Hydrophobic steel wire rubber-coated cord and preparation method thereof - Google Patents

Abstract

Provided is a hydrophobic steel wire rubber-coated cord, comprising the following parts by weight: 100 parts of rubber, 10-120 parts of white carbon black, 0.2-2.4 parts of hydrophobic modifier, 0.1-12 parts of silane coupling agent, 1-10 parts of zinc oxide, 1-10 parts of anti-aging agent, 0.1-5 parts of cobalt boroacylate, 1-10 parts of sulfur powder, and 1-10 parts of promoting agent. Also comprised is a method for preparing a hydrophobic steel wire rubber-coated cord. The hydrophobic steel wire rubber-coated cord and preparation method thereof are such that the interface adhesion of the hydrophobic steel wire rubber-coated cord better and the tensile strength are appropriate, and the anti-humidity and heat aging performance are significantly improved.

Description

Hydrophobic steel wire rubber-coated cord and preparation method thereof Technical field

The invention relates to a steel wire rubber-coated cord, in particular to a hydrophobic steel wire rubber-coated cord and a preparation method thereof.

Background technique

Compared with the traditional carbon black formula, the white carbon black belt formula in radial tires has the advantages of good adhesion, low heat generation, and low rolling resistance: CN201410632796.2 introduces a white carbon black/NR masterbatch for tire belts The preparation method of the rubber compound is to add white carbon black, water, dispersant and stabilizer into the reactor and stir at high speed to prepare a highly dispersed white carbon black slurry; add the white carbon black slurry to the natural latex solution Medium, after mixing under high-speed stirring, acid coagulation, washing and drying to obtain white carbon black/NR masterbatch. The process of the invention adopts a wet process to carry out silanization-free treatment of white carbon black. In the compound adopting the m-a-white adhesive system, the steel wire adhesion performance and tear resistance of the compound can be significantly improved. The white carbon black/natural rubber masterbatch can be used in tire belts. CN200380101219.0 introduces a tire belt layer prepared based on an inorganic filler and a polysulfide silane filled isoprene elastomer composition, where the inorganic filler may be white carbon black.

However, due to the hydrophilicity of the white carbon black surface, the steel belt layer and the steel carcass part of the tire may cause rubber-steel bonding interface failure in some high-temperature and humid areas. The principle is (see Figure 1 for details): water-containing aging In the environment, a continuous water film is first formed on the surface of the belt layer (steel cord). After forming a battery environment with active metals such as Zn, an electrochemical reaction begins. As the corrosion reaction progresses, the continuous medium water film layer A difference in the concentration of Zn ions will be formed, causing Zn ions in areas where no electrochemical reaction or a slow reaction rate has occurred to migrate to areas where an electrochemical reaction or a chemical reaction rate has already occurred, and eventually lead to a large amount of accumulation of zinc elements in the corrosion area. It causes great damage to the steel cord-rubber adhesive layer. Considering that the actual adhesive rubber formulation contains a large amount of ZnO, once water penetrates the surface of the steel cord, it will soon form an electrochemical corrosion reaction, leading to the destruction of the surface structure of the adhesive layer and the loss of adhesion performance.

2Zn+O ₂ = 2ZnO ①

Zn＝Zn ²⁺ +2e ②

O ₂ +2H ₂ O+4e＝4OH ^- ③

^{Zn 2+ + 2OH - = Zn (} OH) 2 ④

Therefore, the belts that completely use white carbon in the prior art may have fatal defects, resulting in serious quality problems for the tires. This is also the case so far. The white carbon black belt formula or white carbon black carcass formula still has no One of the main reasons for widespread use.

The inventor initially tried to use a hydrophobic modifier to solve the technical problem that the hydrophilicity of the surface of the white carbon black caused the failure of the rubber-steel adhesion interface in the steel belt layer and the steel carcass of the tire in some high-temperature and humid areas, but In the later mixing process, the force between the white carbon black and the hydrophobic group is easily destroyed by strong mechanical force, and the technical problem of the failure of the rubber-steel bonding interface will still occur, and it will affect the whiteness of the silane coupling agent. The coupling effect of carbon black leads to a decrease in the tensile strength of the finished rubber compound. It is well known that the tensile strength of the finished rubber compound is a very important indicator that affects the extraction force of the steel-coated rubber cord, and it also causes the rubber-steel wire to stick. An important reason for the failure of the joint interface; therefore, the inventor even once abandoned the initial effort to prepare the hydrophobic steel-coated cord. However, as the experiment proceeded, we were pleasantly surprised to find that the adjustment of the order of addition of the formulation ingredients and the appropriate Process treatment can produce hydrophobic steel wire rubber-coated cord with good hydrophobicity and suitable tensile strength.

In summary, it is of great significance to provide a new formula and preparation method for preparing the hydrophobic steel wire rubber-coated cord so that the hydrophobic steel wire rubber-coated cord has better hydrophobicity and suitable tensile strength.

Summary of the invention

In view of this, the present invention provides a hydrophobic steel wire rubber-coated cord and a preparation method thereof, so that the hydrophobic steel wire rubber-coated cord has better hydrophobicity and suitable tensile strength.

In order to achieve the above object of the invention, the present invention adopts the following technical solutions:

A hydrophobic steel wire rubber-coated cord, including the following parts by weight components: 100 parts of rubber, 10-120 parts of white carbon, 0.2-2.4 parts of hydrophobic modifier, 0.1-12 parts of silane coupling agent, zinc oxide 1 -10 parts, anti-aging agent 1-10 parts, cobalt borate 0.1-5 parts, sulfur powder 1-10 parts, accelerator 1-10 parts.

The hydrophobic modifier provided by the present invention is an alcohol compound or an acrylate compound; the alcohol compound is polyethylene glycol or glycerin; the propionate compound is polyethylene acrylate or polymethacrylic acid Methyl ester.

Preferably, the silane coupling agent is a zirconate coupling agent, a titanate coupling agent, a nitro coupling agent, an alcohol compound, bis(triethoxypropylsilane) tetrasulfide, bis( Triethoxypropylsilane) disulfide, 3-thiocyanopropyl-triethoxysilane, γ-mercaptopropyl-trimethoxysilane, 3-octanoylthio-1-propyltriethyl Oxysilane, [2-(4-chloromethylphenyl)ethyl]-triethoxysilane or (3-mercaptopropyl)-di[tridecylpolyoxyethylene(5)yl]-ethyl Oxysilane.

Preferably, the anti-aging agent is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine or 2,2,4-trimethyl-1,2-dihydroquinoline One or two; the accelerator is N,N-dicyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl-2-phenylpropiothiazole sulfenamide, N-cyclohexyl-2 -Phenylpropiazole sulfenamide, N,N-diisopropyl-2-phenylpropylthiazole sulfenamide, N-oxydiethylene-2-benzothiazole sulfenamide, N,N-diethyl One or more of the sulfonamides of 2-yl-2-benzothiazole.

The rubber provided by the present invention may be natural rubber or synthetic rubber.

The invention provides a method for preparing a hydrophobic steel wire rubber-coated cord, which includes hydrophobic modification of white carbon black. The method of hydrophobic modification is: after pre-mixing the white carbon black with a silane coupling agent Then, the hydrophobic modifier is introduced to perform electron irradiation ionization in an anaerobic environment to obtain hydrophobically modified white carbon black.

Preferably, the accelerator voltage range of the electron irradiation ionization is 0.1-20 MeV, the irradiation electron beam current range is 0.1-100 mA, the electron beam scanning width is ≤200 cm, the irradiation dose range is 5-500 kGy, and the irradiation production line speed is 10m/min.

[Correction according to Rule 91 25.04.2019]
If the silica is directly added to the hydrophobic group for modification without irradiation, the polarity of the silica surface can also be reduced and the hydrophobicity can be increased. However, under this condition, the silica and the hydrophobic functional group form a hydrogen bond. The intermolecular force is not very strong, and in the later process of mixing with rubber in the internal mixer, this hydrogen bond is easily destroyed by strong mechanical force, and the free radicals formed by electron irradiation ionization are Through the action of covalent bonds, the bond energy is very strong and is not easily broken, and the thermal energy generated during the electron irradiation is also conducive to the silanization reaction of white carbon and silane coupling agent, so that the silanization reaction proceeds more fully Therefore, the introduction of silica into the hydrophobic group and electron irradiation ionization under an anaerobic environment can further improve the wet-slip resistance of the hydrophobic steel-coated cord, especially when applied to tires, it can significantly improve the tires. The principle of the hydrophobic modification of white carbon black in the high temperature and humid heat area is shown in Figure 2.

The preparation method provided by the present invention pre-mixes the white carbon black with the silane coupling agent, and then grafts the hydrophobic group to the white carbon black surface, so that the white carbon black surface becomes a hydrophobic surface. The pre-mixing of silane coupling agent can maximize the coupling effect of the silane coupling agent on the white carbon black; if the silane coupling agent is not pre-mixed with the white carbon black in advance, the white carbon black is directly introduced into the hydrophobic group, using an electron accelerator Irradiation, the disadvantage of this method is that the active surface of white carbon black is first occupied by alcohol functional groups or hydrophobic groups, which affects the coupling effect of silane coupling agent on white carbon to a certain extent, making the rubber-white The interaction force between carbon black will be greatly affected, and the tensile strength of the finished compound will be reduced.

In addition to the above steps, the method for preparing a hydrophobic steel wire rubber-coated cord provided by the present invention also includes the following steps:

S ₂ adding the hydrophobically modified white carbon black, the rubber, the zinc oxide, the antioxidant, and the cobalt borate to a kneader to obtain a kneaded rubber;

S ₃ adds the sulfur powder and the accelerator to the rubber compound, and mixes evenly to obtain an adhesive rubber compound;

S ₄ After rolling the adhesive compounded rubber and the copper-plated steel cord, a hydrophobic steel-coated cord is prepared.

Preferably, the kneading temperature in step S ₂ is 160°C, the kneading time is 5 minutes, and the mixer speed is 60 revolutions; the kneading temperature in step S ₃ is 100°C and the kneading time is 3 minutes, the mixer speed is 30 rpm.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram showing the failure of the rubber-steel bonding interface at the steel belt and steel carcass in the tire.

detailed description

The invention discloses a hydrophobic steel wire rubber-coated cord and a preparation method thereof. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and it is obvious that relevant personnel can modify or appropriately modify and combine the method and application described herein without departing from the content, spirit, and scope of the present invention. Apply the technology of the present invention.

In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

It should be noted that the experimental data in the following comparative examples and examples were measured with the following equipment and measurement methods:

Table 1 Test items and methods of vulcanized rubber

Test items	testing method	instrument	Instrument manufacturers
Rubber tensile strength, MPa	GB/T528-2009	tension machine	Instron
Rubber-steel wire drawing adhesion	GB/T16586-2014	tension machine	Instron
Extraction force after humid heat aging	GB/T16586-2014	tension machine	Instron

Comparative Example 1

60 parts by weight of white carbon, 6 parts by weight of silane coupling agent 3-thiocyanopropyl-triethoxysilane, 100 parts by weight of natural rubber, 8 parts by weight of zinc oxide, 1.5 parts by weight of antioxidant 2,2, 4-trimethyl-1,2-dihydroquinoline, 2 parts by weight of antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 0.8 parts by weight of borylated Cobalt is added to the internal mixer for a period of mixing. The mixing temperature is 160℃, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the rubber is evenly mixed, and the rubber is discharged. After parking for 8 hours, it is added to the internal mixer. 5 parts of sulfur powder, 1.4 parts by weight of accelerator N,N-dicyclohexyl-2-benzothiazole sulfenamide vulcanization system for final mixing operation, mixing temperature is 100℃, mixing time is 3 minutes, internal mixer The rotation speed is 30 rpm. After the rubber is evenly mixed, the rubber is discharged. After parking, the steel wire covered rubber cord is produced according to the steel wire rolling process, and the preparation of the No. 1 steel wire covered rubber cord is completed.

Comparative Example 2

Mix 1.2 parts by weight of polyethylene glycol and 60 parts by weight of white carbon black uniformly, irradiate with an electron accelerator to generate free radicals and graft the polyethylene glycol onto the surface of white carbon black to complete the hydrophobic modification of the surface of white carbon black . Electron accelerator irradiation voltage 5MeV, beam intensity 40mA, electron beam scanning width 1600mm, irradiation absorption dose selection 100kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking for 8 hours after irradiation Irradiated white carbon black, 6 parts by weight of silane coupling agent 3-thiocyanopropyl-triethoxysilane, 100 parts by weight of natural rubber, 8 parts by weight of zinc oxide, 1.5 parts by weight of anti-aging agent 2, 2 ,4-trimethyl-1,2-dihydroquinoline, 2 parts by weight of antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 0.8 parts by weight of boron The cobalt compound is added to the internal mixer for a period of mixing. The mixing temperature is 160°C, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the mixing is uniform, and the rubber is discharged. After parking for 8 hours, it is placed in the internal mixer. Add 5 parts of sulfur powder and 1.4 parts by weight of accelerator N,N-dicyclohexyl-2-benzothiazole sulfenamide vulcanization system for final mixing operation, mixing temperature is 100℃, mixing time is 3 minutes, dense mixing The rotating speed of the machine is 30 rpm. After the rubber is evenly mixed, the rubber is discharged. After parking, the steel wire covered rubber cord is produced according to the steel wire rolling process, and the preparation of No. 2 hydrophobic steel wire covered rubber cord is completed.

Example 1

Mix 60 parts by weight of white carbon black, 6 parts by weight of silane coupling agent 3-thiocyanopropyl-triethoxysilane, and then add 1.2 parts by weight of polyethylene glycol, and irradiate with an electron accelerator. Free radicals are generated to graft polyethylene glycol onto the remaining white carbon black surface to complete the hydrophobic modification of the white carbon black surface. Electron accelerator irradiation voltage 5MeV, beam intensity 40mA, electron beam scanning width 1600mm, irradiation absorption dose selection 100kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking for 8 hours after irradiation Irradiated white carbon black, 100 parts by weight of natural rubber, 8 parts by weight of zinc oxide, 1.5 parts by weight of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline, 2 parts by weight of antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 0.8 parts by weight of cobalt borate is added to the internal mixer for a period of mixing, the mixing temperature is 160℃, mixing The time is 5 minutes, the mixer speed is 60 rpm, the rubber is evenly mixed, and after 8 hours of parking, 5 parts of sulfur powder and 1.4 parts by weight of the accelerator N,N-dicyclohexyl-2- are added to the mixer Benzothiazole sulfenamide vulcanization system is used for final mixing operation, the mixing temperature is 100℃, the mixing time is 3 minutes, the mixer speed is 30 rpm, and the rubber is discharged evenly after mixing. After parking, the steel wire is rolled according to the steel wire rolling process The production of rubber-coated cords completed the preparation of No. 3 hydrophobic steel wire rubber-coated cords.

The properties of the steel wire covered cords prepared in Comparative Example 1, Comparative Example 2 and Example 1 are now tested. The test results are shown in Table 2:

Table 2 Performance comparison of steel wire covered rubber cord

The data in Table 1 shows that compared with the No. 1 steel wire covered cord, the No. 2 hydrophobic steel wire covered cord has the same initial pull-out adhesion, but the pull-out force is significantly improved after humid heat aging; The tensile strength of the hydrophobic steel wire rubber compound is somewhat lower than that of No. 1 because polyethylene glycol occupies the active point on the surface of the white carbon black before the silane coupling agent, which affects the silane coupling agent to the white carbon to a certain extent. The coupling effect of black makes the interaction between rubber and silica to be affected, resulting in a decrease in the tensile strength of the compound.

Compared with the No. 1 steel wire covered cord, the No. 3 hydrophobic steel wire covered cord has no difference in initial extraction adhesion, but the extraction force after humid heat aging is significantly improved, and due to the white carbon black and silane coupling The coupling agent is pre-mixed in advance, so that the silane coupling agent can first occupy the optimal active point on the surface of the white carbon black, so there is no adverse effect on the tensile strength of the compound; No. 3 hydrophobic steel wire covered with damp heat After aging, the extraction force has been significantly improved, indicating that its wet skid resistance has been further improved, and its application to tires can significantly improve the tire's resistance to humid heat aging in high temperature and humid areas.

Example 2

Mix 10 parts by weight of white carbon black and 0.1 parts by weight of silane coupling agent titanate coupling agent, and then add 0.2 parts by weight of glycerin and irradiate with an electron accelerator to complete the hydrophobic modification of the surface of white carbon black. Performance, electron accelerator irradiation voltage 0.1MeV, beam intensity 0.1mA, electron beam scanning width 2000mm, irradiation absorption dose selection 5kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking after irradiation 8 hours, then irradiated white carbon black, 100 parts by weight of natural rubber, 1 part by weight of zinc oxide, 1 part by weight of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline, 0.1 Cobalt borate acylate is added to the internal mixer for a period of mixing. The mixing temperature is 160°C, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the rubber is evenly mixed, and the rubber is discharged. After 8 hours of parking Add 1 part of sulfur powder and 1 part by weight of accelerator N,N-diisopropyl-2-phenylpropylthiazole sulfenamide to the internal mixer, and conduct final mixing operation on the vulcanization system. The mixing temperature is 100℃. The time is 3 minutes, the mixer speed is 30 rpm, the rubber is discharged evenly after mixing, and after parking, the steel wire covered cord is produced according to the steel wire rolling process to produce a hydrophobic steel wire covered cord.

Example 3

Mix 90 parts by weight of white carbon black and 12 parts by weight of titanate coupling agent uniformly, then add 0.2 parts by weight of polymethyl methacrylate and irradiate with an electron accelerator to complete the hydrophobic modification of the surface of white carbon black , Electron accelerator irradiation voltage 0.1MeV, beam intensity 0.1mA, electron beam scanning width 2000mm, irradiation absorption dose selection 5kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking after irradiation 8 Hours, then irradiated white carbon black, 100 parts by weight of natural rubber, 1 part by weight of zinc oxide, 1 part by weight of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline, 0.1 part by weight A portion of cobalt borate is added to the internal mixer for a period of mixing. The mixing temperature is 160°C, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the rubber is discharged evenly after mixing, and after 8 hours of parking Add 1 part of sulphur powder and 1 part by weight of accelerator N,N-dicyclohexyl-2-benzothiazole sulfenamide to the final mixer to carry out the final mixing operation of the vulcanization system. The mixing temperature is 100℃ and the mixing time is After 3 minutes, the mixer speed was 30 rpm, and the rubber was discharged evenly after mixing. After parking, the steel wire covered rubber cord was produced according to the steel wire rolling process to produce a hydrophobic steel wire covered rubber cord.

Example 4

Mix 120 parts by weight of white carbon black, 12 parts by weight of silane coupling agent (3-mercaptopropyl)-di[tridecyl polyoxyethylene (5) group]-ethoxysilane, then add 2.4 parts by weight Parts of polyethylene acrylate, irradiated with an electron accelerator to complete the hydrophobic modification of the surface of white carbon black, electron accelerator irradiation voltage 20MeV, beam intensity 100mA, electron beam scanning width 800mm, radiation absorption dose selection 500kGy, radiation According to the production line speed of 10m/min, the irradiation environment is an anaerobic environment. After irradiation, it is cooled and parked for 8 hours, and then the irradiated white carbon, 100 parts by weight of natural rubber, 10 parts by weight of zinc oxide, and 10 parts by weight of antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine and 5 parts by weight of cobalt borate are added to the internal mixer for a period of mixing. The mixing temperature is 160℃. The time is 5 minutes, the speed of the mixer is 60 rpm, the rubber is evenly mixed, and after 8 hours of parking, 10 parts of sulfur powder and 10 parts by weight of the accelerator N-tert-butyl-2-phenylpropylene are added to the mixer Thiazole sulfenamide and N-cyclohexyl-2-phenylpropylthiazole sulfenamide, final vulcanization system operation, mixing temperature 100 ℃, mixing time 3 minutes, internal mixer speed 30 rpm, mixing After smelting uniformly, the rubber is discharged, and after parking, the steel wire covered rubber cords are produced according to the steel wire rolling process to produce hydrophobic steel wire covered rubber cords.

Example 5

Mix 65 parts by weight of white carbon black, 6 parts by weight of silane coupling agent 3-octanoylthio-1-propyltriethoxysilane, and then add 1.3 parts by weight of polyethylene acrylate, using an electron accelerator Irradiation to complete the hydrophobic modification of the white carbon black surface, electron accelerator irradiation voltage 10MeV, beam intensity 50mA, electron beam scanning width 1000mm, irradiation absorption dose selection 28kGy, irradiation production line speed 10m/min, irradiation environment is In an anaerobic environment, cool and park for 8 hours after irradiation, then irradiate the white carbon black, 100 parts by weight of natural rubber, 5 parts by weight of zinc oxide, 6 parts by weight of anti-aging agent 2,2,4-trimethyl-1 ,2-dihydroquinoline and 2.5 parts by weight of cobalt borate are added to the internal mixer for a period of mixing. The mixing temperature is 160℃, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, and the mixing is uniform Back row of rubber, after parking for 8 hours, add 6 parts of sulfur powder, 5 parts by weight of accelerator N,N-diethyl-2-benzothiazole sulfenamide and N-tert-butyl-2-benzene in the mixer Prothiazole sulfenamide, final vulcanization system operation, mixing temperature 100 ℃, mixing time 3 minutes, internal mixer speed 30 rpm, uniform mixing and then discharging rubber, after parking, proceed according to wire rolling process Production of steel wire rubber-coated cords to produce hydrophobic steel wire rubber-coated cords.

Example 6

Mix 48 parts by weight of white carbon black and 5 parts by weight of silane coupling agent alcohol compound, then add 0.8 parts by weight of polyethylene glycol and irradiate with an electron accelerator to complete the hydrophobic modification of the surface of white carbon black. Electron accelerator irradiation voltage 18MeV, beam intensity 80mA, electron beam scanning width 1700mm, irradiation absorption dose selection 200kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking for 8 hours after irradiation Irradiated white carbon black, 100 parts by weight of natural rubber, 7 parts by weight of zinc oxide, 8 parts by weight of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline, 1 part by weight of borylated Cobalt is added to the internal mixer for a period of mixing. The mixing temperature is 160℃, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the rubber is evenly mixed, and the rubber is discharged. After parking for 8 hours, it is added to the internal mixer. 4 parts of sulfur powder, 6 parts by weight of accelerator N,N-diisopropyl-2-phenylpropylthiazole sulfenamide, final vulcanization operation of the vulcanization system, mixing temperature is 100 ℃, mixing time is 3 minutes, The speed of the mixer is 30 rpm, and the rubber is discharged evenly after being mixed. After being parked, the steel wire covered rubber cords are produced according to the steel wire rolling process to produce hydrophobic steel wire covered rubber cords.

Example 7

Mix 10 parts by weight of white carbon black and 0.1 parts by weight of zirconate coupling agent, then add 0.2 parts by weight of glycerin and irradiate with an electron accelerator to complete the hydrophobic modification of the surface of white carbon black. Irradiation voltage 0.1MeV, beam intensity 0.1mA, electron beam scanning width 2000mm, irradiation absorption dose selection 5kGy, irradiation production line speed 10m/min, irradiation environment is anaerobic environment, cooling and parking for 8 hours after irradiation Irradiated white carbon black, 100 parts by weight of natural rubber, 1 part by weight of zinc oxide, 1 part by weight of antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline, 0.1 part by weight of boron The cobalt compound is added to the internal mixer for a period of mixing. The mixing temperature is 160°C, the mixing time is 5 minutes, the internal mixer speed is 60 rpm, the mixing is uniform, and the rubber is discharged. After parking for 8 hours, it is placed in the internal mixer. Add 1 part of sulphur powder and 1 part by weight of accelerator N-oxydiethylene-2-benzothiazole sulfenamide to final vulcanize the system. The mixing temperature is 100℃ and the mixing time is 3 minutes The speed of the mixer is 30 rpm. After mixing, the rubber is discharged evenly. After parking, the steel wire covered rubber cords are produced according to the steel wire rolling process to produce hydrophobic steel wire covered rubber cords.

The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and retouches can be made. These improvements and retouches also It should be regarded as the protection scope of the present invention.

Claims (10)

1. A hydrophobic steel wire rubber-coated cord, characterized by comprising the following parts by weight components: 100 parts of rubber, 10-120 parts of white carbon black, 0.2-2.4 parts of hydrophobic modifier, 0.1-12 parts of silane coupling agent , 1-10 parts of zinc oxide, 1-10 parts of antioxidant, 0.1-5 parts of cobalt borate, 1-10 parts of sulfur powder, 1-10 parts of accelerator.
2. The hydrophobic steel wire rubber-coated cord according to claim 1, wherein the hydrophobic modifier is an alcohol compound or an acrylate compound.
3. The hydrophobic steel wire rubber-coated cord according to claim 1, wherein the alcohol compound is polyethylene glycol or glycerin; the propionate compound is polyethylene acrylate or polymethyl Methyl acrylate.
4. The hydrophobic steel-coated cord according to claim 1, wherein the silane coupling agent is selected from zirconate coupling agent, titanate coupling agent, nitro coupling agent, alcohol compound , Bis(triethoxypropylsilane) tetrasulfide, bis(triethoxypropylsilane) disulfide, 3-thiocyanopropyl-triethoxysilane, γ-mercaptopropyl-trimethyl Oxysilane, 3-octanoylthio-1-propyltriethoxysilane, [2-(4-chloromethylphenyl)ethyl]-triethoxysilane or (3-mercaptopropyl) -Di[tridecyl polyoxyethylene(5)yl]-ethoxysilane.
5. The hydrophobic steel-coated rubber cord according to claim 1, wherein the antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine or 2, One or two of 2,4-trimethyl-1,2-dihydroquinoline; the accelerator is N,N-dicyclohexyl-2-benzothiazole sulfenamide, N-tert-butyl -2-phenylpropylthiazole sulfenamide, N-cyclohexyl-2-phenylpropylthiazole sulfenamide, N,N-diisopropyl-2-phenylpropylthiazole sulfenamide, N-oxydiethylene One or more of -2-benzothiazole sulfenamide and N,N-diethyl-2-benzothiazole sulfenamide.
6. A method for preparing a hydrophobic steel-coated rubber cord according to any one of claims 1 to 5, characterized in that it includes hydrophobic modification of white carbon black, and the method of hydrophobic modification is: After pre-mixing the carbon black and the silane coupling agent, the hydrophobic modifier is introduced again, and electron irradiation ionization is performed in an anaerobic environment to obtain hydrophobically modified white carbon black.
7. The method for preparing a hydrophobic steel wire rubber-coated cord according to claim 6, characterized in that the electron irradiation ionization accelerator voltage range is 0.1-20 MeV, the irradiation electron beam current range is 0.1-100mA, and the electron beam The scanning width is ≤200cm, the irradiation dose range is 5-500kGy, and the irradiation line speed is 10m/min.
8. The method for preparing a hydrophobic steel wire rubber-coated cord according to claim 6, further comprising the following steps:

   S ₂ adding the hydrophobically modified white carbon black, the rubber, the zinc oxide, the antioxidant, and the cobalt borate to a kneader to obtain a kneaded rubber;

   S ₃ adds the sulfur powder and the accelerator to the rubber compound, and mixes evenly to obtain an adhesive rubber compound;

   S ₄ After rolling the adhesive compounded rubber and the copper-plated steel cord, a hydrophobic steel-coated cord is prepared.
9. The method for preparing a hydrophobic steel wire rubber-coated cord according to claim 6, wherein the kneading temperature in step S ₂ is 160°C, the kneading time is 5 minutes, and the mixer speed is 60 rpm .
10. The method of preparing a hydrophobic coating rubber steel cord as claimed in claim 6, wherein the kneading temperature in the step S 100 ₃ deg.] C, kneading time of 3 minutes, 30 rpm mixer .

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