CN109265813B - Salt-fog-resistant flame-retardant marine cable sheath material and preparation method thereof - Google Patents
Salt-fog-resistant flame-retardant marine cable sheath material and preparation method thereof Download PDFInfo
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
The invention relates to a salt-fog-resistant flame-retardant marine cable sheath material and a preparation method thereof, wherein the salt-fog-resistant flame-retardant marine cable sheath material comprises the following components in parts by weight: 50-70 parts of EVM, 30-50 parts of EPDM, 20-40 parts of flame retardant, 1-3 parts of silane coupling agent, 2-3 parts of crosslinking agent, 1-3 parts of auxiliary crosslinking agent, 1-2 parts of anti-aging agent RD, 1-1.5 parts of anti-aging agent DDA, 6-10 parts of plasticizer, 4-6 parts of zinc stearate, 0.5-1.5 parts of stearic acid, 0.5-1.5 parts of Rhine powder and 5-10 parts of nano carbon black. The preparation method comprises (1) mixing EVM and EPDM with a sealing machine; (2) sequentially adding various auxiliary agents such as a flame retardant and the like into an internal mixer, fully and uniformly mixing, and then discharging rubber; (5) and transferring the rubber material to an open mill for open milling. The cable sheath material disclosed by the invention has the advantages of good salt spray resistance, excellent physical and mechanical properties, high weather aging resistance, oil resistance and flame retardance.
Description
Technical Field
The invention relates to a cable sheath material, in particular to a salt fog resistant flame-retardant marine cable sheath material and a preparation method thereof.
Background
The coastal territory of China is vast, and with the rapid development of coastal areas of China, the using amount of marine cables is larger and larger. The marine cable is also called as marine power cable, and is one kind of electric power cable for river and sea ships, offshore oil platform and other water building for lighting and general control. In addition to the corrosion caused by strong wind, acid, alkali, oil, etc., the environment is also subjected to strong ultraviolet irradiation of sunlight and erosion of salt fog. The salt spray has obvious influence on metal materials, dissimilar metal contact surfaces, coating layers and the like, and is mainly exposed to products with high salt content in the atmosphere, particularly products made of metal materials are easy to be affected by the salt spray to generate corrosion and the like. The corrosion of the salt mist to the metal material is mainly in an electrochemical mode. The salt solution is conductive, penetrates into the metal to generate electrochemical reaction to form a micro battery system, the metal used as an anode loses electrons and is dissolved to form new compounds (corrosive substances), and the lost electrons are transferred to a cathode along the electrolyte. Although the wires of the marine cable are protected by the outer layer of nonmetal, the salt fog is easier to contact the inner metal conductor than the salt fog in an intact state along with the aging and cracking of high polymer materials with structures such as an outer sheath and the like, so that the influence on the wires is generated. In addition, the salt spray can also have cross effects with other environmental factors, and the high temperature factor typically increases the corrosion speed caused by the salt spray. After the marine cable is used for a period of time in sun exposure, salt fog or high-humidity environment, the phenomenon that the sheath layer or even the insulating layer is sun-cracked or seriously corroded easily occurs, so that the conductive core body is exposed. The exposed conductive core body is directly communicated with the outside, so that electric shock easily occurs when water permeates into the conductive core body, the efficiency of power transmission is reduced, and even power equipment is burnt out due to short circuit in severe cases, so that huge economic loss is caused.
The existing marine cable sheath layer mostly adopts polyvinyl chloride (PVC) as a base material, and has excellent physical and mechanical properties, electrical properties, flame retardant properties, low price and excellent processability, so the cable sheath layer is widely used as a sheath layer and an insulating material of electric wires and cables. However, the PVC cable sheath buried in the coastal region is easily corroded by acid, alkali and salt for a long time, so that the cable sheath loses electric insulation and plastic is hard, brittle and cracked, and the sheath loses functions. And a large amount of halogen exists in the PVC cable material, so that a large amount of harm is caused to human bodies and the environment during combustion. Although some marine cables used at present adopt materials such as cross-linked polyolefin or silicon rubber to replace polyvinyl chloride to produce the sheath layer, the problems of halogen free and the like are solved to a certain extent, but the performances of salt mist resistance, ultraviolet ray resistance, aging resistance, oil resistance and the like are still to be improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a salt-fog-resistant flame-retardant marine cable sheath material and a preparation method thereof. The prepared sheathing compound has excellent physical and mechanical properties, high salt spray resistance, weather aging resistance, oil resistance and flame retardance.
The cable sheath material comprises the following raw materials in parts by weight:
50-70 parts of ethylene-vinyl acetate rubber EVM,
30-50 parts of ethylene-propylene-diene monomer,
20-40 parts of a flame retardant,
1-3 parts of a silane coupling agent,
2-3 parts of a cross-linking agent,
1-3 parts of an auxiliary crosslinking agent,
1-2 parts of an anti-aging agent RD,
1-1.5 parts of anti-aging agent DDA,
6-10 parts of a plasticizer, namely,
4-6 parts of zinc stearate,
0.5 to 1.5 portions of stearic acid,
0.5 to 1.5 portions of rhinestone powder,
5-8 parts of nano carbon black;
preferably, the raw materials comprise the following components in parts by weight:
ethylene-vinyl acetate rubber EVM700HV 60 parts,
40 parts of ethylene-propylene-diene monomer rubber,
30 parts of a flame retardant, namely 30 parts of a flame retardant,
2 parts of a silane coupling agent;
2 parts of dicumyl peroxide as a crosslinking agent,
2 parts of auxiliary crosslinking agent triallyl isonitrile urea acid ester,
1.5 parts of an anti-aging agent RD;
1 part of an anti-aging agent DDA,
8 parts of plasticizer DOS or DOP,
5 parts of zinc stearate, namely zinc stearate,
1 part of stearic acid, namely 1 part of stearic acid,
1.5 parts of rhinestone powder,
and 6 parts of nano carbon black.
The flame retardant of the invention is preferably prepared from melamine polyphosphate, pentaerythritol and SiO2And AL2O3The four components are compounded, and the weight ratio of the four components is 3:1:1: 1.
preferably, the raw material of the invention also comprises 4-6 parts of polycarbodiimide serving as an anti-hydrolysis agent.
Preferably, the raw material of the invention also comprises 3-5 parts of multi-wall carbon nano-tubes or activated carbon.
Preferably, the feedstock of the present invention further comprises 5-10 parts of hydrogenated nitrile rubber and 3-6 parts of ethylene-vinyl acetate copolymer EVA, most preferably 8 parts of hydrogenated nitrile rubber and 4 parts of ethylene-vinyl acetate copolymer EVA.
The invention also provides a preparation method of the salt mist resistant flame-retardant marine cable sheath material, and the marine cable can be prepared by the method, but is not limited to the preparation method, and other preparation methods meeting the requirements in the prior art can be used.
The preparation method of the salt mist resistant flame-retardant marine cable sheath material comprises the following steps:
(1) weighing the raw materials according to the weight required by the formula;
(2) melamine polyphosphate, pentaerythritol and SiO of flame retardant2And AL2O3Mixing the four components uniformly for later use;
(3) adding ethylene-vinyl acetate rubber and ethylene propylene diene monomer into a sealing machine, and mixing for 1.5-3 minutes;
(4) sequentially adding a flame retardant, a silane coupling agent, an anti-hydrolysis agent, a crosslinking agent, an auxiliary crosslinking agent, an anti-aging agent RD, an anti-aging agent DDA, a plasticizer, zinc stearate, stearic acid, rhinestone powder, nano carbon black and other auxiliary agents into an internal mixer, fully and uniformly mixing the components, and controlling the internal mixing temperature to reach 110-;
(5) transferring the rubber material to an open mill for open milling, turning for several times to reduce the temperature of the rubber material to below 70 ℃, and turning for 4-6 min;
(6) and finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
Preferably, when the raw materials comprise hydrogenated nitrile rubber and EVA, the preparation method comprises the following steps:
(1) weighing the raw materials according to the weight required by the formula;
(2) melamine polyphosphate, pentaerythritol and SiO of flame retardant2And AL2O3Mixing the four components uniformly for later use;
(3) adding ethylene-vinyl acetate rubber, ethylene propylene diene monomer rubber, hydrogenated nitrile rubber and EVA into a sealing machine, and mixing for 1.5-3 minutes;
(4) and sequentially adding a flame retardant, a silane coupling agent, an anti-hydrolysis agent, a crosslinking agent, an auxiliary crosslinking agent, an anti-aging agent RD, an anti-aging agent DDA, a plasticizer, zinc stearate, stearic acid, rhinestone powder, nano carbon black and other auxiliary agents into an internal mixer, fully and uniformly mixing the components, and controlling the internal mixing temperature to reach 110-130 ℃ for rubber discharge to obtain the rubber material.
(5) Transferring the rubber material to an open mill for open milling, turning for several times to reduce the temperature of the rubber material to below 70 ℃, and turning for 4-6 min.
(6) And finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
The ethylene-vinyl acetate rubber (EVM) is prepared by copolymerizing ethylene and vinyl acetate, has the VA content of 40-80 percent (mass fraction), belongs to a thermosetting elastomer, and the M represents a saturated methylene main chain. The EVM main chain is a saturated structure, has good chemical stability, and has excellent high temperature resistance, weather aging resistance, ozone/ultraviolet resistance, oil resistance, environmental stress cracking resistance, adhesiveness and impact resistance. Meanwhile, the nonpolar methylene structure in the main chain endows the EVM with good low-temperature deflection resistance and polar solvent resistance. The introduction of VA side chain destroys the regularity of the main chain, so that the EVM has good low-temperature flexibility and certain oil resistance (equivalent to nitrile rubber with acrylonitrile content of 26-34%). In addition, EVM has the characteristics of excellent flame retardance and low smoke emission, is slightly corrosive, and combustion gas is non-toxic. The EVM contains a large number of polar side groups in molecules, so that the affinity of the molecules and polar inorganic fillers is improved. Ethylene Propylene Diene Monomer (EPDM) has good mechanical property, excellent aging resistance (including thermal oxidation aging resistance, weather aging resistance and ozone aging resistance), chemical resistance and acid and alkali resistance, but has poor stability to oils and aromatic solvents, poor self-adhesion and mutual adhesion of rubber materials and difficult adhesion during forming. The ethylene propylene diene monomer and ethylene-vinyl acetate rubber combination can effectively improve the oil resistance and the processability, improve the mechanical property of the sheath, reduce the cost and increase the aging resistance and the flame retardance.
The flame retardant of the invention is an intumescent flame retardant. At present, most of the flame retardants are inorganic flame retardants, which mainly include magnesium hydroxide, aluminum hydroxide, antimony trioxide, and the like. The inorganic flame retardant has the advantages of difficult volatilization, low smoke toxicity, high stability, low cost and the like. However, inorganic flame retardants also have some problems: in the using process, the inorganic hydroxide flame retardant has low decomposition temperature and is easy to generate strong ignition, the phenomenon can cause that the flame is ignited again after being extinguished, and simultaneously, because the flame retardant has low flame retardant efficiency and large addition amount, the inorganic hydroxide flame retardant is easy to agglomerate in a polymer, thereby obviously reducing the processing and mechanical properties of the material. Such as poor compatibility with the polymer, large loading levels, severe impact on the mechanical properties, and processing of the polymer, and the like.
In order to solve the problems of overlarge filling amount of the inorganic flame retardant and the like, the intumescent flame retardant developed in recent years is more and more emphasized, and has the advantages of no dripping, no toxic gas, small smoke generation amount and the like in the combustion process. The amount of the flame retardant used is much smaller when the polymer is thermally burned. The components are heated to generate chemical reactions with each other to generate an expanded carbon layer on the surface, the carbon layer can play a role in isolating oxygen, heat and molten drops and inhibiting the generation of smoke in a condensed phase, has a good protection effect on polymers exposed in flame, and has the advantages of low smoke, no halogen, no corrosiveness, low toxicity and the like, and the expanded flame retardant system mainly takes carbon, phosphorus and nitrogen as core components, and the flame retardant can foam and expand in the heating process, so the expanded flame retardant is called as an expanded flame retardant. It mainly consists of three parts: (1) the carbon forming agent, i.e. carbon source, is usually a substance with functional groups with relatively high carbon content, such as pentaerythritol, ethylene glycol, triazine derivatives, phenolic resin, cyclodextrin and other carbohydrates or polyhydroxy compounds, and the function of the carbon forming agent is to form carbon by dehydration; (2) dehydrating agents, i.e. acid sources, usually salts or inorganic acids which can generate acids during heating, such as various ammonium phosphates, borates, phosphates, sulfuric acid, boric acid and phosphoric acid, etc., whose main function is to promote the charring of the material matrix; (3) blowing agents, i.e., gas sources, are generally polycarbonic compounds having a relatively high nitrogen content, such as melamine, urea-formaldehyde resins, dicyandiamide, urea, and the like, which release inert gases, including nitrogen compounds, during combustion. The nitrogen compound not only plays a role in foaming, but also promotes formation of a body-based carbonized layer. In recent years, in order to improve the efficacy of intumescent flame retardants, research on flame retardants that integrate a carbon source, an acid source, and a gas source has been focused.
Wherein, the melamine polyphosphate (MPP) is an intumescent flame retardant which can effectively retard the flame of the EVA material, phosphoric acid generated in the thermal degradation process of the P-O-P long chain in the MPP molecular structure can be used as an acid source, and the melamine group is heated and decomposed to generate NNH3And the like, and can be used as a gas source. Pentaerythritol (PER) has received general attention in the flame retardant field because of its good char formation, reactivity, thermal stability, and low cost, which has proven to be an effective carbon source in many flame retardant systems.
According to the invention, the phosphorus-nitrogen flame retardant melamine polyphosphate is compounded with pentaerythritol, and a large number of experiments show that on the basis of compounding, nano SiO2 and AL203 are combined together to serve as the flame retardant, so that the flame retardant effect is very obvious. The nano SiO2 and AL203 are used as the synergist to play a certain synergistic effect. The addition of the compound flame retardant obviously improves the thermal stability of the rubber material, and when the material is burnt, a stable and compact carbon layer is formed on the surface of the material, so that the transfer of heat and oxygen is blocked, the carbon residue of a flame retardant system is improved, and the heat release rate and the total heat release amount of the material are reduced. The nano SiO2 improves the thermal stability of the composite material, reduces the decomposition rate of the composite material, and obviously improves the residual carbon amount. Meanwhile, the nano SiO2 also plays a role in catalyzing the esterification reaction between MPP and PER, and promotes the crosslinking char formation behavior in the degradation process of the composite material system, so that the carbon layer is stabilized, the cells are reinforced, the heat insulation and oxygen isolation capability of the carbon layer is improved, and the efficient synergistic flame retardant effect is achieved. During the combustion process, AL203 and MPP degradation products are bridged to form polyphosphate, so that the decomposition of the polyphosphate is inhibited, more polyphosphate and PE R are promoted to participate in esterification reaction, and the carbon forming capability of the system is improved.
However, the more the flame retardant substances are, the better the flame retardant effect is, for example, when the amount of SiO2 is increased, the crosslinking degree of the system in the degradation process is close to saturation, the carbon residue amount tends to be smooth, and the flame retardant effect is not enhanced by increasing the amount of the flame retardant substances. A large number of experiments show that: melamine polyphosphate, pentaerythritol and SiO2And AL2O3The weight ratio of the four components is 3:1:1: the flame retardant effect is best when 1.
Although the rubber compound of the present invention has excellent high-temperature thermo-oxidative aging resistance, it is preferable to use an appropriate amount of an antioxidant in combination in order to operate under more severe conditions. Wherein, the anti-aging agent RD is an excellent anti-thermal-oxidative aging agent, and the combined effect of the anti-aging agent RD and the anti-aging agent DDA is better. The invention adopts peroxide crosslinking agent dicumyl peroxide (DCP). And an auxiliary crosslinking agent such as triallyl isonitrile ureate (TAIC) or TAC is also matched. EVM is prone to generate pores during steam or heat vulcanization, and in order to stabilize the processing performance, an appropriate amount of hydrolysis resistant agent, such as polycarbodiimide (P-50) or domestic PCD, is often added to the formulation. Since the Mooney viscosity of EVM is low and the roller is easily adhered during processing, an appropriate amount of stearic acid, stearate, or the like is preferably added during the preparation. DOS is the most common plasticizer for EVM, gives consideration to the high and low temperature performance of the sizing material, and the dosage is preferably less than ten parts.
Because the EVM has poor hydrolysis resistance, it is preferable to add an anti-hydrolysis agent. Most preferably, a hydrolysis resistant agent, polycarbodiimide, such as P-50 from Rhine chemical, Germany, or domestic PCD-50, is added. The EVM vulcanized rubber matched with the anti-aging agent RD has the best heat-aging resistance, and if the anti-aging agent RD is used together with an anti-hydrolysis agent, the vulcanized rubber has good anti-hydrolysis and heat-aging resistance. The anti-aging agent and the antioxidant can also improve the aging resistance and the weather resistance of the rubber in the production and use processes.
The plasticizer of the invention is preferably DOS (dioctyl sebacate), which can be compatible with high and low temperature applications.
Hydrogenated Nitrile Butadiene Rubber (HNBR) is prepared by selectively hydrogenating a carbon-carbon double bond part of NBR under the action of a catalyst. Although saturated by hydrogenation, the NBR still has the characteristics of NBR, tensile crystallinity and high strength; the paint has good ozone resistance, weather aging resistance, heat resistance and chemical acid and alkali resistance; under severe conditions, the wear-resistant performance is remarkable; good resistance to swelling (including oils with corrosion additives); the vulcanized rubber has good mechanical property, and the tensile strength of the vulcanized rubber is higher than that of NBR and CR and is close to or higher than that of XNBR; excellent acid and amine/oil blend resistance, as well as oxidation fuel and lubricating oil resistance; tg is between-40 ℃ and 15 ℃ along with the hydrogenation degree, the brittleness temperature is-50 ℃, and the low-temperature performance is good. According to the invention, a certain amount of HNBR is added into the formula, and simultaneously EVA is added as a compatilizer to increase the compatibility of the HNBR and EPDM, so that the processing performance of a basic rubber material can be improved, and the physical and mechanical properties, low temperature resistance and oil resistance are improved.
Advantageous effects
In conclusion, the EVM, the EPDM, the HNBR and the related auxiliary agents are scientifically proportioned, the respective components and the synergistic action among the components are fully exerted, and the developed cable sheath material has excellent physical and mechanical properties, high salt spray resistance, weather aging resistance, oil resistance and flame retardance.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
Example 1
The sheath material of the embodiment comprises the following raw materials:
ethylene-vinyl acetate rubber EVM700HV 60 parts,
40 parts of ethylene-propylene-diene monomer rubber,
30 parts of a flame retardant, namely 30 parts of a flame retardant,
2 parts of a silane coupling agent, namely,
2 parts of dicumyl peroxide as a crosslinking agent,
2 parts of auxiliary crosslinking agent triallyl isonitrile urea acid ester,
1.5 parts of an anti-aging agent RD,
1 part of an anti-aging agent DDA,
8 parts of plasticizer DOS or DOP,
5 parts of zinc stearate, namely zinc stearate,
1 part of stearic acid, namely 1 part of stearic acid,
1.5 parts of rhinestone powder,
and 6 parts of nano carbon black.
5 parts of anti-hydrolysis agent polycarbodiimide,
5 parts of multi-wall carbon nano tubes.
The preparation method of the sheath material of the embodiment 1 comprises the following steps:
(1) weighing the raw materials according to the weight required by the formula;
(2) mixing melamine polyphosphate (MPP) and Pentaerythritol (PER) as flame retardant with SiO2And AL2O3Mixing the four components uniformly for later use;
(3) adding EVM, EPDM, hydrogenated nitrile rubber (HNBR) and EVA into a close-coupled machine, and mixing for 2.5 minutes;
(4) and sequentially adding all the other residual components such as the flame retardant, the silane coupling agent, the anti-hydrolysis agent, the crosslinking agent, the auxiliary crosslinking agent, the anti-aging agent RD, the anti-aging agent DDA, the plasticizer, the zinc stearate, the stearic acid, the rhinestone powder, the nano carbon black and the like into an internal mixer, fully and uniformly mixing the components, and controlling the internal mixing temperature to 125 ℃ for rubber discharge to obtain the rubber material.
(5) And (3) transferring the rubber material to an open mill for open milling, turning the rubber material for several times to reduce the temperature of the rubber material to 65 ℃, and turning the rubber material for about 5 min.
(6) And finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
Examples 2-8 were prepared in the same manner as in example 1, and the raw material formulations for the examples are as follows in table 1:
TABLE 1
The oxygen index of each of the above examples was tested by standard and the specific values are given in table 2 below:
TABLE 2
As can be seen from the data in Table 2, in the case where the total amount of the flame retardant was also 30 parts, MPP was calculated as PER: SiO2:AL2O3The ratio of the four is 3:1:1:1, and the effect is far better than that of other ratios. On the premise of the same proportion, when the amount of the flame retardant is less than 30 parts, the flame retardant effect is poor, and when the amount is far more than 30 parts, the flame retardant effect is not improved any more.
In the following examples, the flame retardant is the same in type, amount and ratio: the dosage is 30 parts, and the ratio of the four parts is 3:1:1: 1.
Examples 9-15 were prepared in the same manner as in example 1, and the raw material formulations are shown in Table 3.
Hydrogenated nitrile rubber and EVA were added to the formulation of example 16, the specific formulation components are shown in Table 3, and the preparation method was:
(1) weighing the raw materials according to the weight required by the formula;
(2) melamine polyphosphate, pentaerythritol and SiO of flame retardant2And AL2O3Mixing the four components uniformly for later use;
(3) adding ethylene-vinyl acetate rubber, ethylene propylene diene monomer rubber, hydrogenated nitrile rubber and EVA into a sealing machine, and mixing for 2 minutes;
(4) and sequentially adding a flame retardant, a silane coupling agent, an anti-hydrolysis agent, a crosslinking agent, an auxiliary crosslinking agent, an anti-aging agent RD, an anti-aging agent DDA, a plasticizer, zinc stearate, stearic acid, rhinestone powder, nano carbon black and other auxiliary agents into an internal mixer, fully and uniformly mixing the components, and controlling the internal mixing temperature to 125 ℃ to discharge rubber to obtain the rubber material.
(5) Transferring the rubber material to an open mill for open milling, turning for several times to reduce the temperature of the rubber material to 65 ℃, and turning for 4-6 min.
(6) And finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
TABLE 3
A commercially available cable sheath material is taken as a comparative example, and relevant indexes such as salt spray resistance and the like of each example and the comparative example are tested according to standard requirements, and specific results are shown in the following table 4:
TABLE 4
As can be seen from table 4 above, the above-mentioned properties of the cable sheathing material of the present invention are significantly better than those of the comparative examples.
Claims (8)
1. The salt-fog-resistant flame-retardant marine cable sheath material is characterized by comprising the following raw materials in parts by weight:
50-70 parts of ethylene-vinyl acetate rubber EVM,
30-50 parts of ethylene-propylene-diene monomer,
30 parts of a flame retardant, namely 30 parts of a flame retardant,
1-3 parts of a silane coupling agent,
2-3 parts of a cross-linking agent,
1-3 parts of an auxiliary crosslinking agent,
1-2 parts of an anti-aging agent RD,
1-1.5 parts of anti-aging agent DDA,
6-10 parts of a plasticizer, namely,
4-6 parts of zinc stearate,
0.5 to 1.5 portions of stearic acid,
0.5 to 1.5 portions of rhinestone powder,
5-10 parts of nano carbon black;
the flame retardant is prepared by compounding melamine polyphosphate, pentaerythritol, SiO2 and Al2O3, wherein the weight ratio of the melamine polyphosphate to the pentaerythritol is 3:1:1: 1.
2. the salt mist resistant flame retardant marine cable sheath material as claimed in claim 1, wherein the raw materials comprise, by weight:
ethylene-vinyl acetate rubber EVM700HV 60 parts,
40 parts of ethylene-propylene-diene monomer rubber,
30 parts of a flame retardant, namely 30 parts of a flame retardant,
2 parts of a silane coupling agent;
2 parts of dicumyl peroxide as a crosslinking agent,
2 parts of auxiliary crosslinking agent triallyl isonitrile urea acid ester,
1.5 parts of an anti-aging agent RD,
1 part of an anti-aging agent DDA,
8 parts of plasticizer DOS or DOP,
5 parts of zinc stearate, namely zinc stearate,
1 part of stearic acid, namely 1 part of stearic acid,
1.5 parts of rhinestone powder,
and 8 parts of nano carbon black.
3. The salt mist resistant flame retardant marine cable sheath material as claimed in claim 1, wherein the raw material further comprises 4-6 parts of hydrolysis resistant agent polycarbodiimide.
4. The salt-fog-preventing flame-retardant marine cable sheath material as claimed in claim 3, wherein the raw materials further comprise multi-walled carbon nanotubes or activated carbon in an amount of 2-8 parts.
5. The salt-fog-resistant flame-retardant marine cable sheath material as claimed in claim 4, wherein the raw materials further comprise 5-10 parts of hydrogenated nitrile rubber and 3-6 parts of ethylene-vinyl acetate copolymer EVA.
6. The salt fog resistant, flame retardant, marine cable sheathing compound according to claim 5, wherein the hydrogenated nitrile rubber is 8 parts, and the ethylene-vinyl acetate copolymer EVA is 4 parts.
7. The method for preparing the salt-fog-resistant flame-retardant marine cable sheath material according to claim 3 or 4, comprising the steps of:
(1) weighing the raw materials according to the weight required by the formula;
(2) uniformly mixing melamine polyphosphate of a flame retardant with pentaerythritol, SiO2 and Al2O3 for later use;
(3) adding ethylene-vinyl acetate rubber and ethylene propylene diene monomer into a sealing machine, and mixing for 1.5-3 minutes;
(4) sequentially adding a flame retardant, a silane coupling agent, an anti-hydrolysis agent, a crosslinking agent, an auxiliary crosslinking agent, an anti-aging agent RD, an anti-aging agent DDA, a plasticizer, zinc stearate, stearic acid, rhinestone powder and nano carbon black into an internal mixer, fully and uniformly mixing, and controlling the internal mixing temperature to reach 110 plus materials and 130 ℃ for rubber discharge to obtain rubber materials;
(5) transferring the rubber material to an open mill for open milling, turning for several times to reduce the temperature of the rubber material to below 70 ℃, and turning for 4-6 min;
(6) and finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
8. The preparation method of the salt mist resistant flame retardant marine cable sheath material as claimed in claim 5, comprising the steps of:
(1) weighing the raw materials according to the weight required by the formula;
(2) uniformly mixing melamine polyphosphate of a flame retardant with pentaerythritol, SiO2 and Al2O3 for later use;
(3) adding ethylene-vinyl acetate rubber, ethylene propylene diene monomer rubber, hydrogenated nitrile rubber and ethylene-vinyl acetate copolymer EVA into a sealing machine, and mixing for 1.5-3 minutes;
(4) sequentially adding a flame retardant, a silane coupling agent, an anti-hydrolysis agent, a crosslinking agent, an auxiliary crosslinking agent, an anti-aging agent RD, an anti-aging agent DDA, a plasticizer, zinc stearate, stearic acid, rhinestone powder and nano carbon black into an internal mixer, fully and uniformly mixing, and controlling the internal mixing temperature to reach 110 plus materials and 130 ℃ for rubber discharge to obtain rubber materials;
(5) transferring the rubber material to an open mill for open milling, turning for several times to reduce the temperature of the rubber material to below 70 ℃, and turning for 4-6 min;
(6) and finally, transferring the uniformly mixed rubber compound to a double-roll calender for splitting.
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| CN110423390B (en) * | 2019-08-02 | 2021-08-24 | 上海嗣高新材料科技有限公司 | Flame-retardant weather-resistant expansion fireproof casing pipe and preparation method thereof |
| CN110551356B (en) * | 2019-08-31 | 2021-09-24 | 江苏枫润线缆材料有限公司 | Flame-retardant sheath material for ultrahigh-voltage cable and preparation method thereof |
| CN112435787A (en) * | 2020-11-05 | 2021-03-02 | 江苏亨通电力电缆有限公司 | Torsion-resistant cable for 66kV fan power transmission and preparation method and application thereof |
| CN112812415A (en) * | 2021-01-05 | 2021-05-18 | 东莞市瑞桥电器有限公司 | Heat-resistant ethylene-vinyl acetate rubber cable material and preparation method thereof |
| CN112831128A (en) * | 2021-01-05 | 2021-05-25 | 东莞市瑞桥电器有限公司 | Electronic potting anti-poisoning cable rubber material and preparation method thereof |
| CN114763424A (en) * | 2021-01-15 | 2022-07-19 | 深圳市沃尔核材股份有限公司 | Cross-linked polyolefin rubber material, preparation method thereof and automobile cable using rubber material |
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| CN104371199A (en) * | 2013-08-14 | 2015-02-25 | 特变电工股份有限公司 | Low-smoke halogen-free coal mine electric cable material and preparation method thereof |
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