CN115295232A - Cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable - Google Patents
Cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable Download PDFInfo
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- CN115295232A CN115295232A CN202210946703.8A CN202210946703A CN115295232A CN 115295232 A CN115295232 A CN 115295232A CN 202210946703 A CN202210946703 A CN 202210946703A CN 115295232 A CN115295232 A CN 115295232A
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
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- 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
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L2023/40—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment by reaction with compounds changing molecular weight
- C08L2023/44—Coupling; Molecular weight increase
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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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Abstract
The invention relates to the field of cables, and aims to solve the problems that the flame retardant property of the existing PE high polymer material is poor, and a fire hazard is spread due to the fact that a melt is easy to drip during combustion, and particularly relates to a crosslinked polyethylene insulation steel belt armored low-smoke halogen-free fire-resistant control cable which comprises a core wire, an alkali-free glass fiber belt winding layer, an inner liner layer, a galvanized steel belt armor layer and a sheath layer.
Description
Technical Field
The invention relates to the field of cables, in particular to a cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable.
Background
The traditional PVC cable generates smoke containing toxic gases such as hydrogen chloride, carbon monoxide, carbon dioxide and the like in the combustion process, which not only influences the smooth operation of disaster relief work, but also causes secondary disasters to lives and properties, and the replacement of PVC cable plastic with high energy consumption, high pollution and low electrical property by halogen-free polyethylene high polymer materials becomes the main trend of the development of the cable industry at present, while most of the existing PE high polymer materials need to be added with 50-60% of hydroxide inorganic flame retardants, so that the mechanical properties of the materials are greatly reduced, and the molten substances of the materials are easy to drop during combustion to cause fire spreading; in addition, a large amount of hydroxide causes the defects of reduced cable insulation performance, accelerated material aging, poor processing fluidity and the like;
how to improve the poor flame retardant property of the existing PE high polymer material, and the PE high polymer material added with a large amount of inorganic flame retardant not only can easily drip the melt during combustion to cause fire spreading, but also can influence the other properties of the PE high polymer material;
therefore, a crosslinked polyethylene insulated steel tape armored low smoke halogen-free fire-resistant control cable is needed to solve the above problems.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable which comprises the following components in percentage by weight: the utility model discloses a fire-retardant cable material of low smoke and zero halogen, including the following parts, be through with crosslinked polyethylene, the fire-retardant additive material of halogen-free adds to mixing in the machine misce bene, obtain the mixture, add the mixture to screw extruder in the melt and extrude, cut grain after the cooling, place the aggregate in the vacuum drying case and dry, obtain low smoke and zero halogen polyethylene material, still through the inner liner with low smoke and zero halogen polyethylene material preparation cable, the restrictive coating, can promote the fire behaviour of cable by a wide margin, it is not good to solve current PE macromolecular material's fire behaviour, and add the PE macromolecular material of a large amount of inorganic fire retardants, not only the melt when burning easily drips and causes the conflagration to stretch, and can also influence the problem of other performances of PE macromolecular material.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a crosslinked polyethylene insulated steel strip armoring low smoke and zero halogen fire control cable, includes heart yearn, alkali-free glass fiber tape winding layer, inner liner, galvanized steel strip armor and restrictive coating, the heart yearn includes conductor, flame retardant coating, insulating layer, the conductor surface parcel has the flame retardant coating, the flame retardant coating is formed by the winding of mica tape, the flame retardant coating surface parcel has the insulating layer, the insulating layer is made by crosslinked polyethylene, a plurality of the surface parcel of heart yearn has alkali-free glass fiber tape winding layer, the surface parcel of alkali-free glass fiber tape winding layer has the inner liner, the surface parcel of inner liner has galvanized steel strip armor, the surface parcel of galvanized steel strip armor has the restrictive coating, inner liner, restrictive coating are made by low smoke and zero halogen polyethylene material;
the low-smoke halogen-free polyethylene material is prepared by the following steps:
the method comprises the following steps: weighing 75-100 parts of crosslinked polyethylene and 5-25 parts of halogen-free flame-retardant additive according to the parts by weight for later use;
step two: adding the crosslinked polyethylene and the halogen-free flame-retardant additive into a mixer, and uniformly mixing to obtain a mixture;
step three: and adding the mixture into a screw extruder for melt extrusion, cooling, granulating, and drying granules in a vacuum drying oven to obtain the low-smoke halogen-free polyethylene material.
As a further scheme of the invention: the preparation method of the halogen-free flame-retardant additive comprises the following steps:
s1: adding 3, 5-dimethoxybenzoic acid, an Eaton reagent and chloroform into a three-neck flask provided with a stirrer, a thermometer, an air duct and a constant-pressure dropping funnel, introducing nitrogen for protection, dropwise adding 1, 3-dimethoxybenzene while stirring under the conditions that the temperature is-5-0 ℃ and the stirring speed is 200-300r/min, controlling the dropwise adding speed to be 1-2 drops/s, continuously stirring and reacting for 20-30min after the dropwise adding is finished, then continuously stirring and reacting for 20-30min under the condition of heating to 20-25 ℃, then continuously stirring and reacting for 10-15h under the condition of heating to 55-60 ℃, cooling a reaction product to 20-25 ℃ after the reaction is finished, then washing for 2-3 times by using distilled water and saturated salt water respectively, and drying an organic phase by using anhydrous sodium sulfate to obtain an intermediate a;
the reaction principle is as follows:
reacting 3, 5-dimethoxybenzoic acid and 1, 3-dimethoxybenzene by using an Eaton reagent as a catalyst, so that carboxyl on the 3, 5-dimethoxybenzoic acid is connected to a benzene ring of the 1, 3-dimethoxybenzene to form carbonyl, and a ketone compound, namely an intermediate a, is obtained;
s2: adding the intermediate a and dichloromethane into a three-neck flask provided with a stirrer, a thermometer, a gas guide tube and a constant-pressure dropping funnel, introducing nitrogen for protection, stirring for 10-15min under the conditions that the temperature is-5-0 ℃ and the stirring speed is 200-300r/min, then adding a boron tribromide solution, continuously stirring for reaction for 20-30min, then heating to 20-25 ℃, continuously stirring for reaction for 4-5h, then adding anhydrous methanol until no boron tribromide smoke volatilizes, then adjusting the pH to 8-9 with a sodium hydroxide solution, then standing for layering, adjusting the pH of a water phase to 4-5 with hydrochloric acid, then extracting for 2-3 times with ethyl acetate, combining extract liquor, and removing the ethyl acetate through rotary evaporation to obtain an intermediate b;
the reaction principle is as follows:
demethylating the methoxy group on the intermediate a by using a boron tribromide solution to convert the methoxy group into a hydroxyl group, so as to obtain an intermediate b;
s3: adding diphenyl chlorophosphate, dichloromethane and triethanolamine into a three-neck flask provided with a stirrer, a thermometer and a constant pressure dropping funnel, dropwise adding the solution of the intermediate b under stirring at the temperature of-5-0 ℃ and the stirring rate of 200-300r/min, controlling the dropwise adding rate to be 1-2 drops/s, continuously stirring and reacting for 20-30min after the dropwise adding is finished, then continuously stirring and reacting for 20-30min under the condition of heating to 20-25 ℃, extracting for 2-3 times by using a mixed solvent after the reaction is finished, drying an organic phase by using anhydrous sodium sulfate, and then rotationally evaporating to remove the solvent to obtain an intermediate c;
the reaction principle is as follows:
reacting diphenyl chlorophosphate with the intermediate b, and carrying out nucleophilic substitution reaction on chlorine atoms on the diphenyl chlorophosphate and hydroxyl groups on the intermediate b so as to introduce diphenyl phosphate groups onto the intermediate b and obtain an intermediate c;
s4: adding the intermediate c and absolute ethyl alcohol into a three-neck flask provided with a stirrer and a thermometer, stirring for 10-15min under the conditions that the temperature is-5-0 ℃ and the stirring speed is 200-300r/min, then adding sodium borohydride, continuously stirring for reacting for 4-5h, then adding distilled water to quench and react, carrying out rotary evaporation on a reaction product to remove the ethyl alcohol, extracting for 2-3 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then carrying out rotary evaporation to remove the solvent to obtain an intermediate d;
the reaction principle is as follows:
reacting sodium borohydride with the intermediate c to reduce carbonyl on the intermediate c into hydroxyl to obtain an intermediate d;
s5: adding the intermediate d, toluene, triethanolamine and p-phenylene diisocyanate into a three-neck flask provided with a stirrer, a thermometer and a reflux condenser, heating to reflux under the condition of stirring speed of 300-500r/min, stirring for reaction for 6-7h, cooling a reaction product to room temperature after the reaction is finished, extracting for 2-3 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then rotationally evaporating to remove the solvent to obtain the halogen-free flame-retardant additive material.
The reaction principle is as follows:
the intermediate d is reacted with p-phenylene diisocyanate, and hydroxyl in the intermediate d is reacted with isocyanate groups in the p-phenylene diisocyanate to obtain the halogen-free flame-retardant additive material which contains a large amount of diphenyl phosphate groups and nitrogen elements and does not contain halogen elements.
As a further scheme of the invention: the dosage ratio of the 3, 5-dimethoxybenzoic acid, the Eaton reagent, the chloroform and the 1, 3-dimethoxybenzene in the step S1 is 0.1mol:0.12mol:50mL of: 150-200mL.
As a further scheme of the invention: the dosage ratio of the intermediate a, the dichloromethane and the boron tribromide solution in the step S2 is 4.4mmol:100mL of: 10-15mL, wherein the boron tribromide solution is a solution with the mass fraction of 1mol/L formed by dissolving boron tribromide in dichloromethane, and the mass fractions of the sodium hydroxide solution and the hydrochloric acid are 1mol/L.
As a further scheme of the invention: the dosage ratio of the diphenyl chlorophosphate, the dichloromethane, the triethanolamine and the intermediate b solution in the step S3 is 10mmol:100mL of: 44mmol:45-50mL, wherein the solution of the intermediate b is the intermediate b according to the molar ratio of 10mmol:10mL of solution formed by dissolving dichloromethane, wherein the mixed solvent is a mixture formed by mixing dichloromethane and deionized water according to equal volume.
As a further scheme of the invention: the dosage ratio of the intermediate c, the absolute ethyl alcohol and the sodium borohydride in the step S4 is 10mmol:100mL of: 8-12mmol.
As a further scheme of the invention: the dosage ratio of the intermediate d, the toluene, the triethanolamine and the p-phenylene diisocyanate in the step S5 is 22mmol:100mL of: 20mmol:10mmol.
The invention has the following beneficial effects:
the invention relates to a cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable, which is characterized in that cross-linked polyethylene and a halogen-free flame-retardant additive are added into a mixing machine to be uniformly mixed to obtain a mixture, the mixture is added into a screw extruder to be melted and extruded, the mixture is cooled and then granulated, granules are placed in a vacuum drying box to be dried to obtain a low-smoke halogen-free polyethylene material, and the inner liner and the sheath layer of the cable are prepared from the low-smoke halogen-free polyethylene material, so that the flame retardant property of the cable can be greatly improved, the cable is prevented from being easily combusted to cause huge economic loss when a fire disaster occurs, the low-smoke halogen-free polyethylene material endows the cable with the advantages of difficult combustion and quick self-extinguishing after combustion, and the situation of fire disaster caused by severe combustion of the cable is avoided;
the preparation method comprises the steps of preparing a halogen-free flame retardant additive in the process of preparing the cross-linked polyethylene insulating steel strip armored low-smoke halogen-free fire-resistant control cable, reacting 3, 5-dimethoxybenzoic acid with 1, 3-dimethoxybenzene to obtain an intermediate a, performing demethylation treatment on methoxy groups on the intermediate a to obtain an intermediate b, reacting diphenyl chlorophosphate with the intermediate b to introduce diphenyl phosphate groups onto the intermediate b to obtain an intermediate c, and reacting sodium borohydride to obtain the halogen-free flame retardant additive which contains a large amount of diphenyl phosphate groups and nitrogen elements and does not contain halogen elements.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a cross-linked polyethylene insulated steel tape armored low smoke halogen-free fire-resistant control cable.
In the figure: 1. a conductor; 2. a refractory layer; 3. an insulating layer; 4. winding the alkali-free glass fiber tape; 5. an inner liner layer; 6. a galvanized steel strip armor layer; 7. and a sheath layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
please refer to fig. 1, the present embodiment is a cross-linked polyethylene insulated steel tape armored low smoke and zero halogen fire-resistant control cable, which includes a core wire, an alkali-free glass fiber tape wound layer 4, an inner liner layer 5, a galvanized steel tape armored layer 6 and a sheath layer 7, the core wire includes a conductor 1, a fire-resistant layer 2, an insulating layer 3, a fire-resistant layer 2 wrapped by a mica tape, the fire-resistant layer 2 wrapped by the surface of the fire-resistant layer 3, the insulating layer 3 made of cross-linked polyethylene, a plurality of core wires wrapped by alkali-free glass fiber tapes wound layer 4, the alkali-free glass fiber tape wound layer 4 wrapped by the surface of the inner liner layer 5, the inner liner layer 5 wrapped by a galvanized steel tape armored layer 6, the galvanized steel tape armored layer 6 wrapped by a sheath layer 7, the inner liner layer 5, the sheath layer 7 made of low smoke and zero halogen polyethylene material.
Example 2:
the embodiment is a preparation method of a halogen-free flame-retardant additive, which comprises the following steps:
s1: adding 0.1mol of 3, 5-dimethoxybenzoic acid, 0.12mol of Eaton reagent and 50mL of chloroform into a three-neck flask provided with a stirrer, a thermometer, a gas-guide tube and a constant-pressure dropping funnel, introducing nitrogen for protection, adding 150mL1, 3-dimethoxybenzene dropwise while stirring under the conditions that the temperature is-5 ℃ and the stirring speed is 200r/min, controlling the dropping speed to be 1 drop/s, continuing to stir for reaction for 20min after the dropping is finished, continuing to stir for reaction for 20min after the temperature is raised to 20 ℃, continuing to stir for reaction for 10h after the temperature is raised to 55 ℃, cooling the reaction product to 20 ℃ after the reaction is finished, washing the reaction product with distilled water and saturated salt water for 2 times respectively, and drying the organic phase with anhydrous sodium sulfate to obtain an intermediate a;
s2: adding 4.4mmol of the intermediate a and 100mL of dichloromethane into a three-neck flask provided with a stirrer, a thermometer, a gas-guide tube and a constant-pressure dropping funnel, introducing nitrogen for protection, stirring for 10min under the conditions that the temperature is-5 ℃ and the stirring speed is 200r/min, then adding 10mL of boron tribromide solution with the mass fraction of 1mol/L, continuing to stir for reaction for 20min, then heating to 20 ℃ and continuing to stir for reaction for 4h, then adding anhydrous methanol until no boron tribromide smoke volatilizes, then adjusting the pH to 8 by using sodium hydroxide solution with the mass fraction of 1mol/L, then standing for layering, adjusting the pH to 4 by using hydrochloric acid with the mass fraction of 1mol/L for a water phase, then extracting for 2 times by using ethyl acetate, combining the extraction liquid, and removing the ethyl acetate by rotary evaporation to obtain an intermediate b;
s3: 10mmol of diphenyl chlorophosphate, 100mL of methylene chloride and 44mmol of triethanolamine were charged in a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and 45mL of intermediate b was added dropwise under stirring at a temperature of-5 ℃ and a stirring rate of 200r/min in accordance with 10mmol:10mL of intermediate b solution formed by dissolving dichloromethane is added at a dropping rate of 1 drop/s, stirring and reacting for 20min after the dropping is finished, heating to 20 ℃, stirring and reacting for 20min, extracting for 2 times by using a mixed solvent after the reaction is finished, drying an organic phase by using anhydrous sodium sulfate, and then removing the solvent by rotary evaporation to obtain an intermediate c;
s4: adding 10mmol of the intermediate c and 100mL of anhydrous ethanol into a three-neck flask provided with a stirrer and a thermometer, stirring for 10min at the temperature of-5 ℃ and at the stirring speed of 200r/min, adding 8mmol of sodium borohydride, continuously stirring for reacting for 4h, adding distilled water, quenching and reacting, carrying out rotary evaporation on a reaction product to remove ethanol, extracting for 2 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then carrying out rotary evaporation to remove the solvent to obtain an intermediate d;
s5: adding 22mmol of intermediate d, 100mL of toluene, 20mmol of triethanolamine and 10mmol of p-phenylene diisocyanate into a three-neck flask provided with a stirrer, a thermometer and a reflux condenser, heating to reflux under the condition of stirring speed of 300r/min, stirring for reaction for 6 hours, cooling a reaction product to room temperature after the reaction is finished, extracting for 2 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then rotationally evaporating to remove the solvent to obtain the halogen-free flame-retardant additive material.
Example 3:
the embodiment is a preparation method of a halogen-free flame-retardant additive, which comprises the following steps:
s1: adding 0.1mol of 3, 5-dimethoxybenzoic acid, 0.12mol of Eaton reagent and 50mL of chloroform into a three-neck flask provided with a stirrer, a thermometer, a gas-guide tube and a constant-pressure dropping funnel, introducing nitrogen for protection, adding 200mL1, 3-dimethoxybenzene dropwise while stirring under the conditions that the temperature is 0 ℃ and the stirring speed is 300r/min, controlling the dropping speed to be 2 drops/s, continuing to stir for reaction for 30min after the dropping is finished, then continuing to stir for reaction for 30min under the condition that the temperature is raised to 25 ℃, then continuing to stir for reaction for 15h under the condition that the temperature is raised to 60 ℃, cooling the reaction product to 25 ℃ after the reaction is finished, then washing 3 times with distilled water and saturated salt water respectively, and drying the organic phase with anhydrous sodium sulfate to obtain an intermediate a;
s2: adding 4.4mmol of the intermediate a and 100mL of dichloromethane into a three-neck flask provided with a stirrer, a thermometer, a gas-guide tube and a constant-pressure dropping funnel, introducing nitrogen for protection, stirring for 15min under the conditions that the temperature is 0 ℃ and the stirring speed is 300r/min, then adding 15mL of boron tribromide solution with the mass fraction of 1mol/L, continuing to stir for reaction for 30min, then heating to 25 ℃ and continuing to stir for reaction for 5h, then adding anhydrous methanol until no boron tribromide smoke volatilizes, then adjusting the pH to 9 by using sodium hydroxide solution with the mass fraction of 1mol/L, then standing for layering, adjusting the pH to 5 by using hydrochloric acid with the mass fraction of 1mol/L for water phase, then extracting for 3 times by using ethyl acetate, combining the extraction liquid and removing the ethyl acetate by rotary evaporation to obtain an intermediate b;
s3: 10mmol of diphenyl chlorophosphate, 100mL of methylene chloride and 44mmol of triethanolamine were charged in a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and 50mL of intermediate b was added dropwise under stirring at a stirring rate of 300r/min at a temperature of 0 ℃ in accordance with 10mmol:10mL of intermediate b solution formed by dissolving dichloromethane is added, the dropping speed is controlled to be 2 drops/s, stirring and reacting are continuously carried out for 30min after the dropping is finished, then the stirring and reacting are continuously carried out for 30min under the condition of heating to 25 ℃, a mixed solvent is used for extracting for 3 times after the reaction is finished, an organic phase is dried by anhydrous sodium sulfate, and then the solvent is removed by rotary evaporation, so that an intermediate c is obtained;
s4: adding 10mmol of the intermediate c and 100mL of anhydrous ethanol into a three-neck flask provided with a stirrer and a thermometer, stirring for 15min under the conditions that the temperature is 0 ℃ and the stirring speed is 300r/min, then adding 12mmol of sodium borohydride, continuing stirring for reaction for 5h, then adding distilled water for quenching reaction, carrying out rotary evaporation on a reaction product to remove ethanol, then extracting for 3 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then carrying out rotary evaporation to remove the solvent, thus obtaining an intermediate d;
s5: adding 22mmol of intermediate d, 100mL of toluene, 20mmol of triethanolamine and 10mmol of p-phenylene diisocyanate into a three-neck flask provided with a stirrer, a thermometer and a reflux condenser, heating to reflux under the condition of stirring speed of 500r/min, stirring for reaction for 7 hours, cooling a reaction product to room temperature after the reaction is finished, extracting for 3 times by using a mixed solvent, drying an organic phase by using anhydrous sodium sulfate, and then rotationally evaporating to remove the solvent to obtain the halogen-free flame-retardant additive material.
Example 4:
the embodiment is a preparation method of a low-smoke halogen-free polyethylene material, which comprises the following steps:
the method comprises the following steps: weighing 75 parts of crosslinked polyethylene and 5 parts of the halogen-free flame-retardant additive from example 2 for later use;
step two: adding the crosslinked polyethylene and the halogen-free flame-retardant additive into a mixer, and uniformly mixing to obtain a mixture;
step three: and adding the mixture into a screw extruder for melt extrusion, cooling, granulating, and drying granules in a vacuum drying oven to obtain the low-smoke halogen-free polyethylene material.
Example 5:
the embodiment is a preparation method of a low-smoke halogen-free polyethylene material, which comprises the following steps:
the method comprises the following steps: weighing 100 parts of crosslinked polyethylene and 25 parts of the halogen-free flame-retardant additive material from example 3 in parts by weight for later use;
step two: adding the crosslinked polyethylene and the halogen-free flame-retardant additive into a mixer, and uniformly mixing to obtain a mixture;
step three: and adding the mixture into a screw extruder for melt extrusion, cooling, granulating, and drying granules in a vacuum drying oven to obtain the low-smoke halogen-free polyethylene material.
Comparative example 1;
comparative example 1 differs from example 5 in that no halogen-free flame retardant additive is added.
Comparative example 2:
comparative example 2 differs from example 5 in that aluminum hydroxide is used instead of the halogen-free flame retardant additive.
Comparative example 3:
comparative example 3 differs from example 5 in that tricresyl phosphate is used instead of a halogen-free flame retardant additive.
The flame retardant performance of the low smoke zero halogen polyethylene materials of examples 4-5 and comparative examples 1-3 is detected, and the detection method comprises the following steps: a JF-3 type limit oxygen index determinator is used for determining a Limit Oxygen Index (LOI) according to GB1070-89 standards; vertical burning test (UL-94): according to ANSL/UL-94-2009 standard, carrying out a UL-94 burning experiment on a sample on an FTT0082 type vertical burning tester; the results are shown in the following table:
| sample (I) | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| LOI，％ | 37.9 | 42.1 | 24.6 | 30.5 | 34.7 |
| UL-94 | V-0 | V-0 | V-2 | V-1 | V-1 |
Referring to the above table data, it can be known that the halogen-free flame retardant additive, the aluminum hydroxide and the tricresyl phosphate can all improve the flame retardant property of the polyethylene material according to the comparison examples with the comparison example 1 and the comparison examples 2-3 with the comparison example 1, and are all halogen-free flame retardants which do not release toxic gases during combustion, and the halogen-free flame retardant additive can be known to improve the flame retardant property of the polyethylene material more obviously than the aluminum hydroxide and the tricresyl phosphate according to the comparison examples with the comparison examples 2-3, and the flame retardant property of the polyethylene material can be further improved with the increase of the addition amount of the halogen-free flame retardant additive according to the comparison examples 4 with the comparison example 5.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. The utility model provides a crosslinked polyethylene insulated steel strip armoring low smoke and zero halogen fire-resistant control cable, a serial communication port, including heart yearn, alkali-free glass fiber tape around layer (4), inner liner (5), galvanized steel strip armor (6) and restrictive coating (7), the heart yearn includes conductor (1), flame retardant coating (2), insulating layer (3), conductor (1) surface coating has flame retardant coating (2), flame retardant coating (2) are formed by the winding of mica tape, flame retardant coating (2) surface coating has insulating layer (3), insulating layer (3) are made by crosslinked polyethylene, a plurality of the surface coating of heart yearn has alkali-free glass fiber tape around layer (4), the surface coating of alkali-free glass fiber tape around layer (4) has inner liner (5), the surface coating of inner liner (5) has galvanized steel strip armor (6), the surface coating of galvanized steel strip armor (6) has restrictive coating (7), restrictive coating (5), restrictive coating (7) are made by halogen-free polyethylene material;
the low-smoke halogen-free polyethylene material is prepared by the following steps:
the method comprises the following steps: weighing 75-100 parts of crosslinked polyethylene and 5-25 parts of halogen-free flame-retardant additive according to the parts by weight for later use;
step two: adding the crosslinked polyethylene and the halogen-free flame-retardant additive into a mixer, and uniformly mixing to obtain a mixture;
step three: and adding the mixture into a screw extruder for melt extrusion, cooling, granulating, and drying granules in a vacuum drying oven to obtain the low-smoke halogen-free polyethylene material.
2. The cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable according to claim 1, wherein the preparation method of the halogen-free flame-retardant additive comprises the following steps:
s1: adding 3, 5-dimethoxybenzoic acid, an Eaton reagent and chloroform into a three-neck flask, dropwise adding 1, 3-dimethoxybenzene while stirring, continuing stirring for reaction after the dropwise addition is finished, cooling and washing a reaction product after the reaction is finished, and drying an organic phase to obtain an intermediate a;
s2: adding the intermediate a and dichloromethane into a three-neck flask, stirring, adding a boron tribromide solution, continuously stirring for reaction, adding anhydrous methanol, adjusting the pH, standing for layering, adjusting the pH of a water phase, extracting, combining the extract liquor, and performing rotary evaporation to obtain an intermediate b;
s3: adding diphenyl chlorophosphate, dichloromethane and triethanolamine into a three-neck flask, dropwise adding the solution of the intermediate b while stirring, continuing stirring for reaction after dropwise adding, extracting with a mixed solvent after the reaction is finished, and drying an organic phase to obtain an intermediate c;
s4: adding the intermediate c and absolute ethyl alcohol into a three-neck flask, stirring, adding sodium borohydride, continuously stirring for reaction, extracting after rotary evaporation of a reaction product, and drying an organic phase to obtain an intermediate d;
s5: and adding the intermediate d, toluene, triethanolamine and p-phenylene diisocyanate into a three-neck flask, heating to reflux, stirring for reaction, cooling and extracting a reaction product after the reaction is finished, and drying an organic phase to obtain the halogen-free flame-retardant additive.
3. The crosslinked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable as claimed in claim 2, wherein the usage ratio of the 3, 5-dimethoxybenzoic acid, the Eaton reagent, the chloroform and the 1, 3-dimethoxybenzene in step S1 is 0.1mol:0.12mol:50mL of: 150-200mL.
4. The cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable according to claim 2, wherein the amount ratio of the intermediate a, dichloromethane and boron tribromide solution in step S2 is 4.4mmol:100mL of: 10-15mL, wherein the boron tribromide solution is a solution with the mass fraction of 1mol/L formed by dissolving boron tribromide in dichloromethane.
5. The cross-linked polyethylene insulated steel tape-armored low-smoke halogen-free fire-resistant control cable according to claim 2, wherein the usage ratio of the diphenyl chlorophosphate, dichloromethane, triethanolamine and the solution of the intermediate b in step S3 is 10mmol:100mL of: 44mmol:45-50mL, wherein the solution of the intermediate b is the intermediate b according to the molar ratio of 10mmol:10mL of solution formed by dissolving dichloromethane, wherein the mixed solvent is a mixture formed by mixing dichloromethane and deionized water according to equal volume.
6. The cross-linked polyethylene insulated steel strip armored low-smoke halogen-free fire-resistant control cable according to claim 2, wherein the intermediate c, the absolute ethyl alcohol and the sodium borohydride in step S4 are used in a ratio of 10mmol:100mL of: 8-12mmol.
7. The cross-linked polyethylene insulated steel tape armored low-smoke halogen-free fire-resistant control cable according to claim 2, wherein the amount ratio of the intermediate d, toluene, triethanolamine and p-phenylene diisocyanate in step S5 is 22mmol:100mL of: 20mmol:10mmol.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115806706A (en) * | 2022-11-30 | 2023-03-17 | 双登电缆股份有限公司 | Low-smoke halogen-free polyolefin cable fireproof sheath material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115806706A (en) * | 2022-11-30 | 2023-03-17 | 双登电缆股份有限公司 | Low-smoke halogen-free polyolefin cable fireproof sheath material and preparation method thereof |
| CN115806706B (en) * | 2022-11-30 | 2024-03-01 | 双登电缆股份有限公司 | Low-smoke halogen-free polyolefin cable fireproof sheath material and preparation method thereof |
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Application publication date: 20221104 |