A marine salt spray corrosion resistant rubber sheathed cable

Abstract

The present invention relates to the technical field of cables, and proposes a marine salt spray corrosion resistant rubber sheathed cable, which comprises a conductor, an insulating layer, a flame retardant layer, an armor layer and a sheath layer from the inside to the outside, and the raw materials of the sheath layer comprise the following components by weight: 100 parts of EPDM rubber, 15-20 parts of modifier-modified kaolin, 60-80 parts of flame retardant, 1-3 parts of antioxidant, 1-5 parts of cross-linking agent, 3-5 parts of accelerator, and the modifier-modified kaolin comprises a first modifier-modified kaolin and a second modifier-modified kaolin in a mass ratio of 1:9-9:1, the first modifier in the first modifier-modified kaolin is a silane coupling agent, and the second modifier in the second modifier-modified kaolin is an organic amine. Through the above technical scheme, the problem of poor salt spray corrosion resistance of marine rubber sheathed cables in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a marine salt spray corrosion resistant rubber sheathed cable. Background Art

[0002] The cable consists of a conductor and a sheath. The sheath not only protects the conductor, but also improves the performance of the cable. On ships, cables play a vital role, responsible for the transmission of electricity, communications, signals, etc., and provide guarantees for the normal operation and safety of ships. Due to the special occasions of ship operation, the operating environment of marine cables has the characteristics of large salt spray and high humidity. Therefore, marine cables are given higher expectations in terms of salt spray resistance, corrosion resistance, moisture resistance, etc. However, the salt spray resistance of current marine rubber sheathed cables is still poor, and there is an urgent need for a marine rubber sheathed cable with good salt spray corrosion resistance. Summary of the invention

[0003] The invention provides a marine salt spray corrosion resistant rubber sheathed cable, which solves the problem of poor salt spray corrosion resistance of the marine rubber sheathed cable in the prior art.

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

[0005] The present invention provides a marine salt spray corrosion resistant rubber sheathed cable, which comprises a conductor, an insulating layer, a flame retardant layer, an armor layer and a sheath layer in order from the inside to the outside. The raw materials of the sheath layer comprise the following components by weight: 100 parts of ethylene propylene rubber, 15-20 parts of modifier-modified kaolin, 60-80 parts of flame retardant, 1-3 parts of antioxidant, 1-5 parts of cross-linking agent, and 3-5 parts of accelerator. The modifier-modified kaolin comprises a first modifier-modified kaolin and a second modifier-modified kaolin in a mass ratio of 1:9-9:1. The first modifier in the first modifier-modified kaolin is a silane coupling agent, and the second modifier in the second modifier-modified kaolin is an organic amine.

[0006] As a further technical solution, the silane coupling agent includes one or more of silane coupling agent YDH-171, silane coupling agent KH-550, and silane coupling agent KH-560, and the organic amine includes one or more of hexadecylamine, octadecylamine, and eicosylamine.

[0007] As a further technical solution, the silane coupling agent is silane coupling agent YDH-171.

[0008] In the present invention, the salt spray corrosion resistance of the marine rubber sheathed cable is further enhanced by limiting the silane coupling agent to silane coupling agent YDH-171.

[0009] As a further technical solution, the mass ratio of the kaolin modified by the first modifier to the kaolin modified by the second modifier is 1:4~4:1.

[0010] In the present invention, the mass ratio of the kaolin modified by the first modifier and the kaolin modified by the second modifier is limited to 1:4-4:1, thereby further enhancing the salt spray corrosion resistance of the marine rubber sheathed cable.

[0011] As a further technical solution, the particle size of the kaolin in the kaolin modified by the first modifier is 1.8 μm.

[0012] As a further technical solution, the particle size of the kaolin in the kaolin modified by the second modifier is 2.5 μm.

[0013] In the present invention, the particle size of kaolin in the kaolin modified by the first modifier is limited to 1.8 μm and the particle size of kaolin in the kaolin modified by the second modifier is limited to 2.5 μm, thereby further enhancing the salt spray corrosion resistance of the marine rubber sheathed cable.

[0014] As a further technical solution, the raw materials of the first modifier-modified kaolin and the second modifier-modified kaolin each independently include the modifier and kaolin in a mass ratio of 1 to 4:40.

[0015] As a further technical solution, the method for preparing kaolin modified by the first modifier comprises the following steps:

[0016] After kaolin, silane coupling agent and water are uniformly mixed, filtered and dried to obtain kaolin modified by the first modifier.

[0017] As a further technical solution, the method for preparing kaolin modified by the second modifier comprises the following steps:

[0018] After dissolving the organic amine in a solvent, kaolin is added and mixed evenly, filtered, and dried to obtain the second modifier-modified kaolin.

[0019] As a further technical solution, the flame retardant includes one or more of decabromodiphenyl ether, dodecachlorocyclodecane, and chlorinated paraffin, the antioxidant includes one or more of antioxidant 1010, antioxidant 1035, and antioxidant 1024, the cross-linking agent includes one or two of diisopropyl peroxide and ethylene glycol dimethacrylate, and the accelerator is zinc dibenzyl dithiocarbamate.

[0020] The working principle and beneficial effects of the present invention are:

[0021] In the present invention, silane coupling agent modified kaolin and organic amine modified kaolin are selected for compound use, so that the dispersibility of kaolin in the sheath layer and the compatibility with EPDM rubber are enhanced, and flame retardants, antioxidants, crosslinking agents, accelerators and other components are added to prepare the sheath layer of the marine rubber sheathed cable. By adjusting and optimizing the addition amount of each component, the salt spray corrosion resistance of the marine rubber sheathed cable is enhanced. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] A marine salt spray corrosion resistant rubber sheathed cable comprises, from the inside to the outside, a conductor, an insulating layer, a flame retardant layer, an armor layer and a sheath layer, wherein the sheath layer is prepared by the following method:

[0024] Example 1

[0025] S1, after mixing 40 parts of kaolin with a particle size of 1.8 μm and 400 parts of water, adding 4 parts of silane coupling agent KH-550, stirring at 55° C. for 2 h, filtering, and drying to obtain kaolin modified by the first modifier;

[0026] S2, dissolving 4 parts of octadecylamine in 100 parts of ethanol, adding 40 parts of kaolin with a particle size of 1.8 μm, mixing evenly, filtering, and drying to obtain a second modifier-modified kaolin;

[0027] S3. Mix 100 parts of EPDM rubber 4045, 2 parts of kaolin modified by the first modifier, 18 parts of kaolin modified by the second modifier, 30 parts of decabromodiphenyl ether, 30 parts of dodecachlorocyclodecane, 1 part of antioxidant 1010, 1 part of diisopropylbenzene peroxide and 3 parts of zinc dibenzyldithiocarbamate in a mixer at 180 rpm and 100° C., transfer the mixture to a twin-screw extruder and extrude it outside the armor layer. After cross-linking by electron beam irradiation at 30 Mrad, the sheath layer of the rubber-sheathed cable is obtained.

[0028] Example 2

[0029] S1. After mixing 40 parts of kaolin with a particle size of 1.8 μm and 400 parts of water, 1 part of silane coupling agent KH-550 was added, stirred at 55° C. for 2 h, and then filtered and dried to obtain kaolin modified by the first modifier;

[0030] S2, dissolving 1 part of eicosamine in 100 parts of ethanol, adding 40 parts of kaolin with a particle size of 1.8 μm, mixing evenly, filtering, and drying to obtain kaolin modified by a second modifier;

[0031] S3. Mix 100 parts of EPDM 4045, 1.5 parts of kaolin modified by the first modifier, 13.5 parts of kaolin modified by the second modifier, 40 parts of decabromodiphenyl ether, 40 parts of dodecachlorocyclodecane, 3 parts of antioxidant 1035, 5 parts of ethylene glycol dimethacrylate and 5 parts of zinc dibenzyl dithiocarbamate in a mixer at 180 rpm and 100° C., transfer the mixture to a twin-screw extruder and extrude it outside the armor layer. After cross-linking by electron beam irradiation at 30 Mrad, the sheath layer of the rubber-sheathed cable is obtained.

[0032] Example 3

[0033] The only difference from Example 1 is that the silane coupling agent KH-550 is replaced by an equal amount of silane coupling agent YDH-171.

[0034] Example 4

[0035] The only difference from Example 1 is that the silane coupling agent KH-550 is replaced by an equal amount of silane coupling agent KH-560.

[0036] Example 5

[0037] The only difference from Example 3 is that the kaolin modified by the first modifier is 18 parts, and the kaolin modified by the second modifier is 2 parts.

[0038] Example 6

[0039] The only difference between Example 3 is that the kaolin modified by the first modifier is 16 parts, and the kaolin modified by the second modifier is 4 parts.

[0040] Example 7

[0041] The only difference from Example 3 is that the kaolin modified by the first modifier is 4 parts, and the kaolin modified by the second modifier is 16 parts.

[0042] Example 8

[0043] The only difference from Example 7 is that the kaolin particle size of the kaolin modified by the first modifier is 2.5 μm.

[0044] Example 9

[0045] The only difference from Example 7 is that the kaolin particle size of the kaolin modified by the first modifier is 2.5 μm, and the kaolin particle size of the kaolin modified by the second modifier is 2.5 μm.

[0046] Example 10

[0047] The only difference from Example 7 is that the kaolin particle size of the kaolin modified by the second modifier is 2.5 μm.

[0048] Comparative Example 1

[0049] 100 parts of EPDM rubber 4045, 20 parts of kaolin with a particle size of 1.8 μm, 0.2 parts of silane coupling agent KH-550, 1.8 parts of octadecylamine, 30 parts of decabromodiphenyl ether, 30 parts of dodecachlorocyclodecane, 1 part of oxidant 1010, 1 part of diisopropylbenzene peroxide and 3 parts of zinc dibenzyldithiocarbamate were mixed uniformly in a mixer at 180 rpm and 100° C., transferred to a twin-screw extruder and extruded outside the armor layer, and cross-linked by 30 Mrad electron beam irradiation to obtain the sheath layer of the rubber sheathed cable.

[0050] Comparative Example 2

[0051] S1. After mixing 40 parts of kaolin with a particle size of 1.8 μm and 400 parts of water, 4 parts of silane coupling agent KH-550 were added, stirred at 55° C. for 2 h, and then filtered and dried to obtain modifier-modified kaolin;

[0052] S2. Mix 100 parts of EPDM 4045 rubber, 20 parts of modified kaolin, 30 parts of decabromodiphenyl ether, 30 parts of dodecachlorocyclodecane, 1 part of antioxidant 1010, 1 part of diisopropylbenzene peroxide and 3 parts of zinc dibenzyldithiocarbamate in a mixer at 180 rpm and 100° C., transfer the mixture to a twin-screw extruder and extrude it outside the armor layer. After cross-linking by electron beam irradiation at 30 Mrad, the sheath layer of the rubber-sheathed cable is obtained.

[0053] Comparative Example 3

[0054] S1, dissolving 4 parts of octadecylamine in 100 parts of ethanol, adding 40 parts of kaolin with a particle size of 1.8 μm, mixing evenly, filtering, and drying to obtain modifier-modified kaolin;

[0055] S2. Mix 100 parts of EPDM 4045 rubber, 20 parts of modified kaolin, 30 parts of decabromodiphenyl ether, 30 parts of dodecachlorocyclodecane, 1 part of antioxidant 1010, 1 part of diisopropylbenzene peroxide and 3 parts of zinc dibenzyldithiocarbamate in a mixer at 180 rpm and 100° C., transfer the mixture to a twin-screw extruder and extrude it outside the armor layer. After cross-linking by electron beam irradiation at 30 Mrad, the sheath layer of the rubber-sheathed cable is obtained.

[0056] Test example

[0057] The samples to be tested were prepared according to the raw materials and preparation methods of the sheath layers of Examples 1 to 10 and Comparative Examples 1 to 3, respectively, and cut into IA type dumbbell-shaped specimens in GB / T 528-2009, and then subjected to a 168h salt spray resistance test with reference to the method in GB / T 2423.17-2008, wherein the mass concentration of the salt solution was 5%, and the tensile strength before and after the salt spray resistance test was tested with reference to the method in GB / T 528-2009, and the change rate was calculated according to the following formula:

[0058] Change rate = (tensile strength before salt spray resistance - tensile strength after salt spray resistance) ÷ tensile strength before salt spray resistance × 100%;

[0059] The results are shown in Table 1.

[0060] Table 1 Test results of salt spray corrosion resistance of Examples 1 to 10 and Comparative Examples 1 to 3

[0061]

[0062] Compared with Comparative Examples 1 to 3, the marine salt spray corrosion resistant rubber sheathed cables prepared in Example 1 and Example 3 to 4 are a compound use of kaolin modified by a first modifier and kaolin modified by a second modifier. As a result, the tensile strength before salt spray resistance of Example 1 and Example 3 to 4 is higher than that of Comparative Examples 1 to 3, and the rate of change of Example 1 and Example 3 to 4 is lower than that of Comparative Examples 1 to 3, indicating that the compound use of kaolin modified by the first modifier and kaolin modified by the second modifier synergistically enhances the salt spray corrosion resistance of the marine salt spray corrosion resistant rubber sheathed cable.

[0063] Compared with Example 1 and Example 4, the first modifier modified kaolin in the marine salt spray corrosion resistant rubber sheathed cable prepared in Example 3 is silane coupling agent YDH-171. As a result, the tensile strength before salt spray resistance of Example 3 is higher than that of Example 1 and Example 4, and the rate of change of Example 3 is lower than that of Example 1 and Example 4, indicating that by limiting the silane coupling agent to silane coupling agent YDH-171, the salt spray corrosion resistance of the marine salt spray corrosion resistant rubber sheathed cable is further enhanced.

[0064] Compared with Example 3 and Example 5, the mass ratio of kaolin modified by the first modifier to kaolin modified by the second modifier in the marine salt spray corrosion resistant rubber sheathed cable prepared in Examples 6-7 is 1:4-4:1. As a result, the tensile strength before salt spray resistance of Examples 6-7 is higher than that of Examples 3 and 5, and the change rate of Examples 6-7 is lower than that of Examples 3 and 5, indicating that the mass ratio of kaolin modified by the first modifier to kaolin modified by the second modifier is 1:4-4:1, which further enhances the salt spray corrosion resistance of the marine salt spray corrosion resistant rubber sheathed cable.

[0065] Compared with Examples 7 to 9, the particle size of kaolin in the kaolin modified by the first modifier in the marine salt spray corrosion resistant rubber sheathed cable prepared in Example 10 is 1.8 μm, and the particle size of kaolin in the kaolin modified by the second modifier is 2.5 μm. As a result, the tensile strength before corrosion resistance of Example 10 is higher than that of Examples 7 to 9, and the rate of change of Example 10 is lower than that of Examples 7 to 9, indicating that the particle size of kaolin in the kaolin modified by the first modifier is 1.8 μm and the particle size of kaolin in the kaolin modified by the second modifier is 2.5 μm, which further enhances the salt spray corrosion resistance of the marine salt spray corrosion resistant rubber sheathed cable.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A marine salt spray corrosion resistant rubber sheathed cable, comprising a conductor, an insulating layer, a flame retardant layer, an armor layer and a sheath layer from the inside to the outside, characterized in that: The raw materials of the sheath layer include the following components in parts by weight: 100 parts of EPDM rubber, 15-20 parts of modifier-modified kaolin, 60-80 parts of flame retardant, 1-3 parts of antioxidant, 1-5 parts of cross-linking agent, and 3-5 parts of accelerator. The modifier-modified kaolin includes a first modifier-modified kaolin and a second modifier-modified kaolin in a mass ratio of 1:9-9:

1. The first modifier in the first modifier-modified kaolin is a silane coupling agent, and the second modifier in the second modifier-modified kaolin is an organic amine.

2. A marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The silane coupling agent includes one or more of silane coupling agent YDH-171, silane coupling agent KH-550, and silane coupling agent KH-560, and the organic amine includes one or more of hexadecylamine, octadecylamine, and eicosylamine.

3. A marine salt spray corrosion resistant rubber sheathed cable according to claim 2, characterized in that: The silane coupling agent is silane coupling agent YDH-171.

4. A marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The mass ratio of the kaolin modified by the first modifier to the kaolin modified by the second modifier is 1:4 to 4:

1.

5. The marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The particle size of the kaolin in the kaolin modified by the first modifier is 1.8 μm.

6. The marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The particle size of the kaolin in the kaolin modified by the second modifier is 2.5 μm.

7. The marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The raw materials of the first modifier-modified kaolin and the second modifier-modified kaolin each independently include a modifier and kaolin in a mass ratio of 1 to 4:

40.

8. A marine salt spray corrosion resistant rubber sheathed cable according to claim 7, characterized in that: The method for preparing kaolin modified by the first modifier comprises the following steps: After kaolin, silane coupling agent and water are uniformly mixed, filtered and dried to obtain kaolin modified by the first modifier.

9. The marine salt spray corrosion resistant rubber sheathed cable according to claim 7, characterized in that: The method for preparing kaolin modified by the second modifier comprises the following steps: After dissolving the organic amine in a solvent, kaolin is added and mixed evenly, filtered, and dried to obtain the second modifier-modified kaolin.

10. The marine salt spray corrosion resistant rubber sheathed cable according to claim 1, characterized in that: The flame retardant includes one or more of decabromodiphenyl ether, dodecachlorocyclodecane, and chlorinated paraffin; the antioxidant includes one or more of antioxidant 1010, antioxidant 1035, and antioxidant 1024.

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