CN113851266B - Cross-linked polyethylene insulation halogen-free low-smoke flame-retardant B1-level power cable - Google Patents
Cross-linked polyethylene insulation halogen-free low-smoke flame-retardant B1-level power cable Download PDFInfo
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- CN113851266B CN113851266B CN202111108198.1A CN202111108198A CN113851266B CN 113851266 B CN113851266 B CN 113851266B CN 202111108198 A CN202111108198 A CN 202111108198A CN 113851266 B CN113851266 B CN 113851266B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention relates to a crosslinked polyethylene insulating halogen-free low-smoke flame-retardant B1-level power cable, which belongs to the technical field of cable preparation, and comprises a copper conductor, wherein a flame retardant layer is coated on the outer surface of the copper conductor, an insulating layer is coated on the outer surface of the flame retardant layer, the copper conductor, the flame retardant layer and the insulating layer form a cable core, three cable cores are in a group, the outer layer of one group of cable cores is coated with an inner liner, a halogen-free low-smoke flame-retardant polypropylene rope is filled between the inner liner and the cable core, an inner sheath is coated on the outer surface of the inner liner, an armor layer is arranged on the outer surface of the inner sheath, an outer sheath is arranged on the outer surface of the armor layer, and the inner sheath and the outer sheath are made of halogen-free low-smoke flame-retardant polyolefin materials; the halogen-free low-smoke flame-retardant polyolefin material is obtained by stirring, mixing and extruding polyolefin, ethylene-octene copolymer, reactive flame-retardant molecules and other auxiliary agents, and has better flame-retardant performance and easy processing compared with the existing flame-retardant polyolefin material.
Description
Technical Field
The invention belongs to the technical field of cable preparation, and particularly relates to a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-level power cable.
Background
The flame-retardant power cable is characterized in that a sample is burnt under a specified test condition, and after a test fire source is removed, flame spread is only within a limited range, and residual flame or residual burning can be automatically extinguished within a limited time. The fundamental characteristics are: in the case of fire, the cable may burn out and fail to operate, but the spread of the fire may be prevented.
Existing flame retardant power cables are mainly divided into two categories: halogen-containing flame-retardant power cables and halogen-free low-smoke flame-retardant power cables, the former have good flame-retardant characteristics, but a large amount of dense smoke and halogen acid gas are released when the cables are burnt, and the halogen acid gas not only pollutes the environment but also hurts the health of human bodies. The latter not only has better flame retardant property, but also has no halogen acid gas emission during cable combustion, and the fuming amount of the cable is small, but has poor mechanical property, easy deformation and low service life. Therefore, how to improve the compatibility of the halogen-free flame retardant and the polymer, and endow the cable with better processability and flame retardant property is a technical problem to be solved at present.
Disclosure of Invention
The invention aims to provide a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-level power cable, which aims to solve the technical problems in the background technology.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides a steamed low fire-retardant B1 level power cable of low smoke of crosslinked polyethylene insulation, including the copper conductor, copper conductor surface cladding has the flame retardant coating, the flame retardant coating is by double-deck mica tape lapping to obtain, the flame retardant coating surface cladding has the insulating layer, the insulating layer is made by silane crosslinked polyethylene, copper conductor, flame retardant coating and insulating layer form the cable core, three cable cores are a set of, the outer cladding of a set of cable core has the inner liner, it has steamed low smoke of low fire-retardant polypropylene rope to fill between inner liner and the cable core, the inner liner surface cladding has the inner sheath, the inner sheath surface is equipped with the armor, the armor adopts galvanized steel tape, the armor surface is equipped with the oversheath;
wherein, the inner sheath and the outer sheath are both made of halogen-free low-smoke flame-retardant polyolefin materials;
further, the halogen-free low-smoke flame-retardant polyolefin material is prepared by the following steps:
step 1, preparing the following raw materials in parts by weight: 50-60 parts of high-density polyethylene, 10-15 parts of linear low-density polyethylene, 10-15 parts of ethylene-octene copolymer, 1.5-1.8 parts of reactive flame retardant molecules, 2 parts of montmorillonite, 1 part of 3- (methacryloyloxy) propyl trimethoxysilane, 0.3-0.5 part of zinc stearate, 0.3 part of stearic acid, 1.0 part of antioxidant and 1.5 parts of anti-aging agent;
and 2, adding the raw materials into a high-speed mixer, stirring and mixing for 5-15min at the rotating speed of 1100-1500r/min, and then extruding and granulating at the temperature of 160-180 ℃ to obtain the halogen-free low-smoke flame-retardant polyolefin material.
The invention adds montmorillonite, which has unique lamellar structure, can reduce the permeability of polymer to gas, and enhance the flame-retardant and aging-resistant properties of the outer sheath.
Further, the antioxidant is antioxidant 168, and the antioxidant is antioxidant RD.
Further, the reactive flame retardant molecule is made by the steps of:
s1, adding iron powder, absolute ethyl alcohol, deionized water and concentrated hydrochloric acid into a three-neck flask, heating to 80 ℃ for activation for 30min, cooling to 60 ℃, adding 2-trifluoromethyl-4-nitrobenzyl chloride, heating to 80 ℃, stirring for reaction for 6-8h, filtering to remove iron mud after the reaction is finished, adding ammonia water with the mass fraction of 25% for regulating the pH value of filtrate to 8, standing for 8-12h, adding ethyl acetate for extraction, and removing ethyl acetate by rotary evaporation to obtain an intermediate 1;
wherein, the dosage ratio of the iron powder, the absolute ethyl alcohol, the deionized water, the concentrated hydrochloric acid and the 2-trifluoromethyl-4-nitrobenzyl chloride is 2.68g:50mL:10mL:1.5-2.5mL:4.5-4.8g, wherein the mass fraction of the concentrated hydrochloric acid is 37%, and the nitro group of the 2-trifluoromethyl-4-nitrobenzyl chloride is reduced to amino group under the reduction of iron powder to obtain an intermediate 1;
s2, adding DOPO, vinyl acetic acid and benzene into a three-neck flask, heating to 80 ℃ under the protection of nitrogen, dropwise adding a benzene solution of AIBN under the stirring condition, finishing dropwise adding within 1h, reacting for 24h under the heat preservation, filtering after the reaction is finished, and removing benzene from filtrate by rotary evaporation to obtain an intermediate 2;
wherein the benzene solution of DOPO, vinylacetic acid, benzene and AIBN is used in an amount ratio of 0.1mol:0.1mol:100mL:50mL of a benzene solution of AIBN was prepared from AIBN and benzene in an amount of 0.1g:50mL of the mixture is mixed, DOPO and vinyl acetic acid are utilized to carry out chemical reaction to obtain an intermediate 2 containing carboxyl end groups;
s3, adding triglycidyl isocyanurate and toluene into a three-neck flask, stirring for 20min, adding an intermediate 1, heating to 40-50 ℃, stirring for 2-4h, cooling to room temperature after the reaction is finished, adding p-toluenesulfonic acid and the intermediate 2, heating to 50-55 ℃, stirring for 6-8h, adding sodium bicarbonate solution with the concentration of 0.1mol/L for washing a reaction product after the reaction is finished, layering, and distilling an organic phase to remove toluene to obtain an intermediate 3;
wherein the dosage ratio of triglycidyl isocyanurate, toluene, intermediate 1 and intermediate 2 is 0.05mol:150-180mL:0.15mol: the dosage of the p-toluenesulfonic acid is 3-5% of the total mass of triglycidyl isocyanurate, the intermediate 1 and the intermediate 2, firstly, the epoxy group of the triglycidyl isocyanurate and the amino group of the intermediate 1 are subjected to ring opening reaction to obtain a hydroxyl-containing product, and then the hydroxyl and the carboxyl are subjected to esterification reaction under the catalysis of the p-toluenesulfonic acid to obtain an intermediate 3;
s4, adding an intermediate 3 and acetonitrile into the three-neck flask, controlling the temperature to be 25+/-1 ℃, stirring for 10min, adding hydroxyethyl methacrylate and triethylamine, stirring for reaction for 8-12h, cooling to room temperature after the reaction is finished, transferring a reaction product into deionized water, carrying out suction filtration, and drying a filter cake to constant weight at 80 ℃ to obtain a reactive flame retardant molecule;
wherein the dosage ratio of the intermediate 3, acetonitrile, hydroxyethyl methacrylate and triethylamine is 0.1mol:400mL:0.3mol:6.8-10.1g, and the intermediate 3 and the hydroxyethyl methacrylate are utilized to carry out the reaction of eliminating hydrogen chloride to obtain the reactive flame retardant molecule.
The invention has the beneficial effects that:
the invention provides a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-level power cable, wherein an inner sheath and an outer sheath are both made of halogen-free low-smoke flame-retardant polyolefin materials; compared with the existing flame-retardant polyolefin material, the flame-retardant polyolefin material has better flame-retardant performance and is easy to process, mainly because the flame retardant is a reactive flame retardant of an organic macromolecule, the addition of an inorganic flame retardant and a halogen-containing flame retardant is avoided, the problem of poor compatibility between the inorganic flame retardant and a polymer matrix is solved, adverse effects of the halogen-containing flame retardant on human health and environment are reduced, the reactive flame retardant molecule contains an unsaturated double bond, a fluoromethyl group, a DOPO structure and a carbon-nitrogen six-membered ring, an acid source, a carbon source and an air source are integrated, the proper P, C, N proportion is provided, the flame-retardant effect can be better exerted, the existence of the unsaturated double bond can be subjected to graft polymerization reaction with polyolefin, the stability and the dispersibility of the flame retardant in the polymer are improved, and the existence of the fluoromethyl can improve the hydrophobicity, the solvent resistance and the weather resistance of the polyolefin material, so that the power cable prepared by the flame-retardant polyolefin material has better flame-retardant performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a cross-linked polyethylene insulated halogen-free low smoke flame retardant B1 grade power cable.
In the drawings, the list of components represented by the various numbers is as follows:
1. a copper conductor; 2. a refractory layer; 3. an insulating layer; 4. halogen-free low-smoke flame-retardant polypropylene ropes; 5. an inner liner layer; 6. an inner sheath; 7. an armor layer; 8. an outer sheath.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a halogen-free low-smoke flame-retardant polyolefin material, which is prepared by the following steps:
step 1, preparing the following raw materials in parts by weight: 50 parts of high-density polyethylene, 10 parts of linear low-density polyethylene, 10 parts of ethylene-octene copolymer, 1.5 parts of reactive flame retardant molecules, 2 parts of montmorillonite, 1 part of 3- (methacryloyloxy) propyl trimethoxy silane, 0.3 part of zinc stearate, 0.3 part of stearic acid, 1.0 part of antioxidant and 1.5 parts of anti-aging agent;
and 2, weighing the raw materials according to the proportion in the formula, adding the raw materials into a high-speed mixer, stirring and mixing for 5min at the rotating speed of 1100r/min, and extruding and granulating at 160 ℃ to obtain the halogen-free low-smoke flame-retardant polyolefin material.
Wherein the antioxidant is antioxidant 168, and the antioxidant is antioxidant RD.
Wherein, the reactive flame retardant molecule is prepared by the following steps:
s1, adding 2.68g of iron powder, 50mL of absolute ethyl alcohol, 10mL of deionized water and 1.5mL of concentrated hydrochloric acid into a three-neck flask, heating to 80 ℃ for activation for 30min, cooling to 60 ℃, adding 4.5g of 2-trifluoromethyl-4-nitrobenzyl chloride, heating to 80 ℃, stirring for reaction for 6h, filtering to remove iron mud, adding ammonia water with the mass fraction of 25% to adjust the pH value of the filtrate to 8, standing for 8h, adding ethyl acetate for extraction, and removing ethyl acetate by rotary evaporation to obtain an intermediate 1, wherein the mass fraction of the concentrated hydrochloric acid is 37%;
step S2, adding 0.1mol of DOPO, 0.1mol of vinyl acetic acid and 50mL of benzene into a three-necked flask, heating to 80 ℃ under the protection of nitrogen, dropwise adding a benzene solution of AIBN under the stirring condition, keeping the temperature for 24 hours after the dropwise adding is finished, filtering after the reaction is finished, and removing benzene by rotary evaporation of filtrate to obtain an intermediate 2, wherein the benzene solution of AIBN is prepared from 0.1g of AIBN and benzene: 50mL of the mixture;
s3, adding 0.05mol of triglycidyl isocyanurate and 150mL of toluene into a three-necked flask, stirring for 20min, adding 0.15mol of intermediate 1, heating to 40 ℃, stirring for 2h, cooling to room temperature after the reaction is finished, adding p-toluenesulfonic acid and 0.15mol of intermediate 2, heating to 50 ℃, stirring for 6h, adding sodium bicarbonate solution with the concentration of 0.1mol/L to wash a reaction product after the reaction is finished, layering, distilling an organic phase to remove toluene to obtain intermediate 3, wherein the dosage of p-toluenesulfonic acid is 3% of the total mass of triglycidyl isocyanurate, intermediate 1 and intermediate 2;
and S4, adding 0.1mol of intermediate 3 and 400mL of acetonitrile into the three-neck flask, controlling the temperature to be 24 ℃, stirring for 10min, adding 0.3mol of hydroxyethyl methacrylate and 6.8g of triethylamine, stirring for reaction for 8h, cooling to room temperature after the reaction is finished, transferring the reaction product into deionized water, carrying out suction filtration, and drying a filter cake to constant weight at 80 ℃ to obtain the reactive flame retardant molecule.
Example 2
The embodiment provides a halogen-free low-smoke flame-retardant polyolefin material, which is prepared by the following steps:
step 1, preparing the following raw materials in parts by weight: 55 parts of high-density polyethylene, 12 parts of linear low-density polyethylene, 12 parts of ethylene-octene copolymer, 1.7 parts of reactive flame retardant molecules, 2 parts of montmorillonite, 1 part of 3- (methacryloyloxy) propyl trimethoxy silane, 0.4 part of zinc stearate, 0.3 part of stearic acid, 1.0 part of antioxidant and 1.5 parts of anti-aging agent;
and 2, weighing the raw materials according to the proportion in the formula, adding the raw materials into a high-speed mixer, stirring and mixing for 10min at the rotating speed of 1200r/min, and extruding and granulating at 170 ℃ to obtain the halogen-free low-smoke flame-retardant polyolefin material.
Wherein the antioxidant is antioxidant 168, and the antioxidant is antioxidant RD.
Wherein, the reactive flame retardant molecule is prepared by the following steps:
s1, adding 2.68g of iron powder, 50mL of absolute ethyl alcohol, 10mL of deionized water and 1.8mL of concentrated hydrochloric acid into a three-neck flask, heating to 80 ℃ for activation for 30min, cooling to 60 ℃, adding 4.7g of 2-trifluoromethyl-4-nitrobenzyl chloride, heating to 80 ℃, stirring for reaction for 7h, filtering to remove iron mud after the reaction is finished, adding ammonia water with the mass fraction of 25% for regulating the pH value of the filtrate to 8, standing for 10h, adding ethyl acetate for extraction, and removing ethyl acetate by rotary evaporation to obtain an intermediate 1, wherein the mass fraction of the concentrated hydrochloric acid is 37%;
step S2, adding 0.1mol of DOPO, 0.1mol of vinyl acetic acid and 50mL of benzene into a three-necked flask, heating to 80 ℃ under the protection of nitrogen, dropwise adding a benzene solution of AIBN under the stirring condition, keeping the temperature for 24 hours after the dropwise adding is finished, filtering after the reaction is finished, and removing benzene by rotary evaporation of filtrate to obtain an intermediate 2, wherein the benzene solution of AIBN is prepared from 0.1g of AIBN and benzene: 50mL of the mixture;
s3, adding 0.05mol of triglycidyl isocyanurate and 170mL of toluene into a three-necked flask, stirring for 20min, adding 0.15mol of intermediate 1, heating to 45 ℃, stirring for 3h, cooling to room temperature after the reaction is finished, adding p-toluenesulfonic acid and 0.15mol of intermediate 2, heating to 52 ℃, stirring for 7h, adding sodium bicarbonate solution with the concentration of 0.1mol/L to wash a reaction product after the reaction is finished, layering, distilling an organic phase to remove toluene to obtain intermediate 3, wherein the dosage of p-toluenesulfonic acid is 4% of the total mass of triglycidyl isocyanurate, intermediate 1 and intermediate 2;
and S4, adding 0.1mol of intermediate 3 and 400mL of acetonitrile into the three-neck flask, controlling the temperature to 25 ℃, stirring for 10min, adding 0.3mol of hydroxyethyl methacrylate and 7.2g of triethylamine, stirring for reaction for 10h, cooling to room temperature after the reaction is finished, transferring the reaction product into deionized water, carrying out suction filtration, and drying a filter cake to constant weight at 80 ℃ to obtain the reactive flame retardant molecule.
Example 3
The embodiment provides a halogen-free low-smoke flame-retardant polyolefin material, which is prepared by the following steps:
step 1, preparing the following raw materials in parts by weight: 60 parts of high-density polyethylene, 15 parts of linear low-density polyethylene, 15 parts of ethylene-octene copolymer, 1.8 parts of reactive flame retardant molecules, 2 parts of montmorillonite, 1 part of 3- (methacryloyloxy) propyl trimethoxysilane, 0.5 part of zinc stearate, 0.3 part of stearic acid, 1.0 part of antioxidant and 1.5 parts of anti-aging agent;
and 2, weighing the raw materials according to the proportion in the formula, adding the raw materials into a high-speed mixer, stirring and mixing for 15min at the rotating speed of 1500r/min, and extruding and granulating at 180 ℃ to obtain the halogen-free low-smoke flame-retardant polyolefin material.
Wherein the antioxidant is antioxidant 168, and the antioxidant is antioxidant RD.
Wherein, the reactive flame retardant molecule is prepared by the following steps:
s1, adding 2.68g of iron powder, 50mL of absolute ethyl alcohol, 10mL of deionized water and 2.5mL of concentrated hydrochloric acid into a three-neck flask, heating to 80 ℃ for activation for 30min, cooling to 60 ℃, adding 4.8g of 2-trifluoromethyl-4-nitrobenzyl chloride, heating to 80 ℃, stirring for reaction for 8h, filtering to remove iron mud after the reaction is finished, adding ammonia water with the mass fraction of 25% for regulating the pH value of the filtrate to 8, standing for 12h, adding ethyl acetate for extraction, and removing ethyl acetate by rotary evaporation to obtain an intermediate 1, wherein the mass fraction of the concentrated hydrochloric acid is 37%;
step S2, adding 0.1mol of DOPO, 0.1mol of vinyl acetic acid and 50mL of benzene into a three-necked flask, heating to 80 ℃ under the protection of nitrogen, dropwise adding a benzene solution of AIBN under the stirring condition, keeping the temperature for 24 hours after the dropwise adding is finished, filtering after the reaction is finished, and removing benzene by rotary evaporation of filtrate to obtain an intermediate 2, wherein the benzene solution of AIBN is prepared from 0.1g of AIBN and benzene: 50mL of the mixture;
s3, adding 0.05mol of triglycidyl isocyanurate and 180mL of toluene into a three-necked flask, stirring for 20min, adding 0.15mol of intermediate 1, heating to 50 ℃, stirring for 4h, cooling to room temperature after the reaction is finished, adding p-toluenesulfonic acid and 0.15mol of intermediate 2, heating to 55 ℃, stirring for 8h, adding sodium bicarbonate solution with the concentration of 0.1mol/L to wash a reaction product after the reaction is finished, layering, distilling an organic phase to remove toluene to obtain intermediate 3, wherein the dosage of p-toluenesulfonic acid is 5% of the total mass of triglycidyl isocyanurate, intermediate 1 and intermediate 2;
and S4, adding 0.1mol of intermediate 3 and 400mL of acetonitrile into the three-neck flask, controlling the temperature to 26 ℃, stirring for 10min, adding 0.3mol of hydroxyethyl methacrylate and 10.1g of triethylamine, stirring for reaction for 12h, cooling to room temperature after the reaction is finished, transferring the reaction product into deionized water, carrying out suction filtration, and drying a filter cake to constant weight at 80 ℃ to obtain the reactive flame retardant molecule.
Comparative example 1
The reactive flame retardant molecule in example 1 was replaced with a flame retardant sold by Ying Xiang Plastic materials Co., dongguan, inc., the remainder of the materials and preparation process being unchanged.
Comparative example 2
The reactive flame retardant molecules in example 2 were replaced with the TCEP flame retardant sold by Cheng Jina Xiangfeng Utility chemical Co., ltd. With the rest of the raw materials and the preparation process unchanged.
Referring to fig. 1, the invention discloses a crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-level power cable, which comprises a copper conductor 1, wherein the outer surface of the copper conductor 1 is coated with a flame retardant layer 2, the flame retardant layer 2 is wrapped by a double-layer mica tape, the outer surface of the flame retardant layer 2 is coated with an insulating layer 3, the insulating layer 3 is made of silane crosslinked polyethylene, the copper conductor 1, the flame retardant layer 2 and the insulating layer 3 form a cable core, three cable cores are in a group, the outer layer of one group of cable cores is coated with an inner liner 5, a halogen-free low-smoke flame-retardant polypropylene rope 4 is filled between the inner liner 5 and the cable core, the outer surface of the inner liner 5 is coated with an inner jacket 6, the outer surface of the inner jacket 6 is provided with an armor layer 7, the armor layer 7 adopts a galvanized steel tape, the outer surface of the armor layer 7 is provided with an outer jacket 8, and the inner jacket 6 and the outer jacket 8 are made of halogen-free low-smoke flame-retardant polyolefin material;
the samples prepared in examples 1-3 and comparative examples 1-2 were used to prepare finished cable products, and then finished product tests and tests were performed with reference to the standards GB 31247-2014 "grading Combustion Performance of Cable and optical Cable", and the test results are shown in Table 1:
TABLE 1
Remarks: in the tobacco toxicity irritation test, the number of test mice is 10 (half of each of the male and female), and the test mice are 5-8 weeks old.
As can be seen from Table 1, the cables prepared using the samples prepared in examples 1-3 gave higher flame retardancy, less smoke production, safety and non-toxicity than the cables prepared using the samples prepared in comparative examples 1-2.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.
Claims (7)
1. The utility model provides a steamed low fire-retardant B1 level power cable of low smoke of crosslinked polyethylene insulation, a serial communication port, including copper conductor (1), copper conductor (1) surface cladding has flame retardant coating (2), flame retardant coating (2) surface cladding has insulating layer (3), copper conductor (1), flame retardant coating (2) and insulating layer (3) form the cable core, three cable core is a set of, the outer cladding of a set of cable core has inner liner (5), it has steamed low smoke fire-retardant polypropylene rope (4) to fill between inner liner (5) and the cable core, inner liner (5) surface cladding has inner sheath (6), inner sheath (6) surface is equipped with armor (7), armor (7) surface is equipped with oversheath (8), inner sheath (6) and oversheath (8) are made by steamed low smoke fire-retardant polyolefin material;
wherein, the halogen-free low-smoke flame-retardant polyolefin material is prepared by the following steps:
mixing high-density polyethylene, linear low-density polyethylene, ethylene octene copolymer, reactive flame-retardant molecules, montmorillonite, 3- (methacryloyloxy) propyl trimethoxy silane, zinc stearate, stearic acid, an antioxidant and an anti-aging agent, and extruding and granulating at 160-180 ℃ to obtain a halogen-free low-smoke flame-retardant polyolefin material;
the reactive flame retardant molecule is prepared by the following steps:
s1, adding iron powder, absolute ethyl alcohol, deionized water and concentrated hydrochloric acid into a three-neck flask, heating to 80 ℃ for activation for 30min, cooling to 60 ℃, adding 2-trifluoromethyl-4-nitrobenzyl chloride, heating to 80 ℃, stirring for reaction for 6-8h, filtering, regulating the pH value of filtrate to 8 by using ammonia water, standing, extracting, and steaming in a rotating way to obtain an intermediate 1;
step S2, mixing DOPO, vinyl acetic acid and benzene, heating to 80 ℃ under the protection of nitrogen, dropwise adding a benzene solution of AIBN under stirring, reacting for 24 hours under heat preservation, filtering, and steaming the filtrate to obtain an intermediate 2;
step S3, after triglycidyl isocyanurate and toluene are mixed, adding the intermediate 1, heating to 40-50 ℃, stirring and reacting for 2-4 hours, cooling, adding p-toluenesulfonic acid and the intermediate 2, heating to 50-55 ℃, stirring and reacting for 6-8 hours, washing, layering and distilling to obtain an intermediate 3;
and S4, mixing the intermediate 3 with acetonitrile, controlling the temperature to be 25+/-1 ℃, adding hydroxyethyl methacrylate and triethylamine, stirring and reacting for 8-12 hours, cooling, transferring a reaction product into deionized water, carrying out suction filtration, and drying a filter cake to obtain the reactive flame retardant molecule.
2. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-grade power cable according to claim 1, wherein the halogen-free low-smoke flame-retardant polyolefin material comprises the following raw materials in parts by weight:
50-60 parts of high-density polyethylene, 10-15 parts of linear low-density polyethylene, 10-15 parts of ethylene-octene copolymer, 1.5-1.8 parts of reactive flame retardant molecules, 2 parts of montmorillonite, 1 part of 3- (methacryloyloxy) propyl trimethoxysilane, 0.3-0.5 part of zinc stearate, 0.3 part of stearic acid, 1.0 part of antioxidant and 1.5 parts of anti-aging agent.
3. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-grade power cable according to claim 1, wherein the mass fraction of concentrated hydrochloric acid in the step S1 is 37%.
4. The crosslinked polyethylene insulated halogen-free low smoke flame retardant B1 grade power cable of claim 1, wherein the benzene solution of AIBN in step S2 is prepared from AIBN and benzene in an amount of 0.1g:50mL of the mixture.
5. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-grade power cable according to claim 1, wherein the dosage of the p-toluenesulfonic acid in the step S3 is 3-5% of the total mass of triglycidyl isocyanurate, the intermediate 1 and the intermediate 2.
6. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1 grade power cable according to claim 1, wherein the dosage ratio of intermediate 3, acetonitrile, hydroxyethyl methacrylate and triethylamine in step S4 is 0.1mol:400mL:0.3mol:6.8-10.1g.
7. The crosslinked polyethylene insulated halogen-free low-smoke flame-retardant B1-level power cable according to claim 1, wherein the antioxidant is antioxidant 168 and the anti-aging agent is anti-aging agent RD.
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| CN114334235B (en) * | 2022-01-20 | 2023-06-06 | 安徽鸿海电缆有限公司 | Polyethylene insulation intrinsic safety flame-retardant computer cable |
| CN114864165B (en) * | 2022-03-30 | 2023-05-30 | 安徽华上电缆科技有限公司 | Crosslinked polyethylene insulating flame-retardant polyvinyl chloride sheath variable-frequency cable |
| CN115527703A (en) * | 2022-09-01 | 2022-12-27 | 北京市昆仑线缆制造有限公司 | Halogen-free low-smoke A-level flame-retardant efficient energy-saving wire for home decoration |
| CN115895087A (en) * | 2022-12-06 | 2023-04-04 | 东莞市明盛电气有限公司 | Flame-retardant crosslinked polyethylene insulated cable and preparation method thereof |
| CN116631675B (en) * | 2023-06-15 | 2024-03-15 | 安徽远征传导科技股份有限公司 | Mobile abrasion-resistant and drag-resistant shielded cable with large cross section and flame resistance |
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