CN114933777B - Preparation method of special double-conductor coaxial cable for rectifier - Google Patents
Preparation method of special double-conductor coaxial cable for rectifier Download PDFInfo
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- CN114933777B CN114933777B CN202210723271.4A CN202210723271A CN114933777B CN 114933777 B CN114933777 B CN 114933777B CN 202210723271 A CN202210723271 A CN 202210723271A CN 114933777 B CN114933777 B CN 114933777B
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- phenolic resin
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- 239000004020 conductor Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 53
- OHRVBDRGLIWLPA-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] dihydrogen phosphate Chemical compound OCC(CO)(CO)COP(O)(O)=O OHRVBDRGLIWLPA-UHFFFAOYSA-N 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 15
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 14
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 14
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 238000005187 foaming Methods 0.000 claims description 13
- 239000004088 foaming agent Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- PIHPSKJRLDSJPX-UHFFFAOYSA-N ethyl n-carbamoylcarbamate Chemical compound CCOC(=O)NC(N)=O PIHPSKJRLDSJPX-UHFFFAOYSA-N 0.000 claims description 6
- 239000008098 formaldehyde solution Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000005711 Benzoic acid Substances 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000005011 phenolic resin Substances 0.000 abstract description 20
- 229920001568 phenolic resin Polymers 0.000 abstract description 20
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical compound NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 abstract description 5
- 239000006260 foam Substances 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 abstract description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 239000004202 carbamide Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- YSAANLSYLSUVHB-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]ethanol Chemical compound CN(C)CCOCCO YSAANLSYLSUVHB-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- KMNUDJAXRXUZQS-UHFFFAOYSA-L zinc;n-ethyl-n-phenylcarbamodithioate Chemical compound [Zn+2].CCN(C([S-])=S)C1=CC=CC=C1.CCN(C([S-])=S)C1=CC=CC=C1 KMNUDJAXRXUZQS-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/016—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables
- H01B13/0165—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing co-axial cables of the layers outside the outer conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/067—Insulating coaxial cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/36—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes condensation products of phenols with aldehydes or ketones
-
- 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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
- C08J2361/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C08J2361/14—Modified phenol-aldehyde condensates
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
Abstract
The application discloses a preparation method of a special double-conductor coaxial cable for a rectifier, which comprises the following steps: wrapping an inner insulating layer on the outer side of the inner conductor, wrapping an outer conductor on the outer side of the inner insulating layer, wrapping a wrapping belt on the outer conductor, and wrapping a sheath on the wrapping belt; the inner insulating layer is prepared through the following steps. The modified phenolic resin has compact and uniform cells and higher closed cell rate, mainly because the urea-based flexible chain is led into the phenolic resin by adding the allophanate, the molecular structure of only methylene connection between benzene rings of the phenolic resin is changed, so that the molecular weight of the phenolic resin is increased, the crosslinking density is improved, the phenolic resin has higher density and closed cell rate, and partial hydrogen bonds are formed between pentaerythritol phosphate and phenolic resin molecules and between allophanate molecules, the acting force between molecules is enhanced, and the mechanical property of the foam body is improved.
Description
Technical Field
The application relates to the technical field of cable preparation, in particular to a preparation method of a special double-conductor coaxial cable for a rectifier.
Background
Cables are widely used in various fields as electric energy and information transmission bodies, and are generally made of one or more mutually insulated conductors covered with an insulating and protective layer, and wires for transmitting electric power or information from one place to another place, and are widely used in electric power systems.
The patent number 2013102212626 discloses a cable and application thereof in a power system, wherein the insulating material is prepared from the following raw materials in parts by weight: 100-90 parts of bisphenol F type epoxy resin, 60-50 parts of phenolic resin powder, 30-25 parts of silicon carbide, 20-18 parts of white carbon black, 15-12 parts of zinc N-ethyl-N-phenyldithiocarbamate, 10-8 parts of calcium carbonate, 10-8 parts of cryolite, 8-6 parts of N-phenyl-2-naphthylamine, 7-5 parts of stearic acid, 6-4 parts of magnesium hydroxide, 6-4 parts of zinc borate, 3-2 parts of triallyl isocyanurate, 2 parts of dimethylaminoethoxy ethanol and 2 parts of short peptide; although the cable has good flame retardant effect and mechanical property, the preparation method does not improve the flame retardant property and mechanical property of the cable by modifying phenolic resin powder and modifying montmorillonite in a synergistic way.
Disclosure of Invention
The application aims to provide a preparation method of a special double-conductor coaxial cable for a rectifier, which solves the following technical problems: how to improve the flame retardance and the mechanical property of the cable by the cooperation of the modified phenolic resin powder and the modified montmorillonite.
The aim of the application can be achieved by the following technical scheme:
a preparation method of a special double-conductor coaxial cable for a rectifier comprises the following steps: wrapping an inner insulating layer on the outer side of the inner conductor, wrapping an outer conductor on the outer side of the inner insulating layer, wrapping a wrapping belt on the outer conductor, and wrapping a sheath on the wrapping belt;
the inner insulating layer is prepared by the following steps:
step one, weighing 90-100 parts of modified phenolic resin, 0.7-0.9 part of foaming agent, 20-30 parts of modified montmorillonite, 2-6 parts of ammonium polyphosphate and 0.7-0.9 part of curing agent according to parts by weight;
adding the foaming agent, the modified montmorillonite and the ammonium polyphosphate into the modified phenolic resin for mixing, performing ultrasonic dispersion for 4-6 minutes, and stirring and mixing for 4-6 minutes to obtain a composite material;
and thirdly, adding the composite material into a self-made foaming cup, adding a curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mould, and finally, placing the mould into an electrothermal blowing drying oven at 60 ℃ for solidification.
As a further scheme of the application: the modified phenolic resin is prepared by the following steps: adding 30-40 parts of phenol and 20-30 parts of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the temperature of a water bath to be 55-65 ℃, then dropwise adding 5-10 parts of sodium hydroxide solution, keeping the temperature for 30-40min after the dropwise adding is finished, heating to 80-90 ℃ to react for 1.5-2.5h, then adding 0.6-1.1 part of ethyl allophanate to react for 25-35min, adding 0.5-1 part of pentaerythritol phosphate, continuously keeping the temperature for 25-35min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation dehydration to obtain the modified phenolic resin.
As a further scheme of the application: the mass fraction of the sodium hydroxide solution was 20%.
As a further scheme of the application: the modified montmorillonite is modified by cetyl trimethyl ammonium bromide.
As a further scheme of the application: the curing agent comprises p-benzoic acid, phosphoric acid and water according to the mass ratio of 2:1:1, mixing and preparing.
The application has the beneficial effects that:
the modified phenolic resin has compact and uniform cells and higher closed cell rate, mainly because the addition of the allophanate introduces an allophanate flexible chain into the phenolic resin, changes the molecular structure of only methylene connection between benzene rings of the phenolic resin, increases the molecular weight of the phenolic resin and improves the crosslinking density, so that the phenolic resin has higher density and closed cell rate, and the addition of pentaerythritol phosphate forms partial hydrogen bonds with phenolic resin molecules and allophanate molecules, thereby enhancing acting force among molecules and improving the mechanical property of the foam; according to the application, the phenolic resin is modified, and then the modified montmorillonite and the ammonium polyphosphate are added into the modified phenolic resin, so that the modified phenolic resin enters the modified montmorillonite sheet layer and forms a good composite material, the modified montmorillonite is effectively dispersed and peeled in the modified phenolic resin, large-scale agglomeration does not occur, the mechanical property of the composite modified phenolic resin is promoted to a certain extent, and the flame retardance of the composite modified phenolic resin can be further improved by matching with the ammonium polyphosphate.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1:
the inner insulating layer is prepared by the following steps:
step one, weighing 90g of modified phenolic resin, 0.7g of foaming agent, 20g of modified montmorillonite modified by cetyl trimethyl ammonium bromide, 2g of ammonium polyphosphate and 0.7g of curing agent according to g;
adding the foaming agent, the modified montmorillonite and the ammonium polyphosphate into the modified phenolic resin for mixing, performing ultrasonic dispersion for 4 minutes, and stirring and mixing for 4 minutes to obtain a composite material;
and thirdly, adding the composite material into a self-made foaming cup, adding a curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mould, and finally, placing the mould into an electrothermal blowing drying oven at 60 ℃ for solidification.
Example 2:
the inner insulating layer is prepared by the following steps:
step one, weighing 100g of modified phenolic resin, 0.9g of foaming agent, 30g of modified montmorillonite modified by cetyl trimethyl ammonium bromide, 6g of ammonium polyphosphate and 0.9g of curing agent according to g;
adding the foaming agent, the modified montmorillonite and the ammonium polyphosphate into the modified phenolic resin for mixing, performing ultrasonic dispersion for 6 minutes, and stirring and mixing for 6 minutes to obtain a composite material;
step three, adding the composite material into a self-made foaming cup, and adding p-benzoic acid, phosphoric acid and water according to the mass ratio of 2:1:1, mixing the prepared curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mold, and finally placing the mold into an electrothermal blowing drying oven at 60 ℃ for solidification.
Example 3:
the modified phenolic resin is prepared by the following steps: adding 30g of phenol and 250mL of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the water bath temperature to be 55 ℃, then dropwise adding 50mL of sodium hydroxide solution with mass fraction of 2%, keeping the temperature for 30min after the dropwise adding is finished, then heating to 80 ℃ for reaction for 1.5h, then adding 0.6g of ethyl allophanate for reaction for 25min, adding 5g of pentaerythritol phosphate, keeping the temperature for 25min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation and dehydration to obtain the modified phenolic resin.
Example 4:
the modified phenolic resin is prepared by the following steps: adding 40g of phenol and 250mL of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the water bath temperature to be 65 ℃, then dropwise adding 50mL of sodium hydroxide solution with mass fraction of 2%, keeping the temperature for 40min after the dropwise adding is finished, then heating to 90 ℃ for reaction for 2.5h, then adding 1.1g of ethyl allophanate for reaction for 35min, adding 5g of pentaerythritol phosphate, keeping the temperature for 35min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation and dehydration to obtain the modified phenolic resin.
Example 5:
a preparation method of a special double-conductor coaxial cable for a rectifier comprises the following steps:
adding 40g of phenol and 250mL of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the water bath temperature to be 65 ℃, then dropwise adding 50mL of sodium hydroxide solution with mass fraction of 2%, keeping the temperature for 40min after the dropwise adding is finished, then heating to 90 ℃ for reacting for 2.5h, then adding 1.1g of ethyl allophanate, reacting for 35min, adding 10g of pentaerythritol phosphate, keeping the temperature for 35min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation and dehydration to obtain the modified phenolic resin;
weighing 100g of modified phenolic resin, 0.9g of foaming agent, 30g of modified montmorillonite modified by cetyl trimethyl ammonium bromide, 6g of ammonium polyphosphate and 0.9g of curing agent according to the weight; adding a foaming agent, modified montmorillonite and ammonium polyphosphate into modified phenolic resin for mixing, performing ultrasonic dispersion for 6 minutes, and stirring and mixing for 6 minutes to obtain a composite material; adding the composite material into a self-made foaming cup, and adding p-benzoic acid, phosphoric acid and water according to the mass ratio of 2:1:1, mixing the prepared curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mold, and finally placing the mold into an electrothermal blowing drying oven at 60 ℃ for solidification;
the inner insulating layer is wrapped on the outer side of the inner conductor, the outer conductor is wrapped on the inner insulating layer, the wrapping tape is wrapped on the outer conductor, and the sheath is wrapped on the wrapping tape.
Example 6:
a preparation method of a special double-conductor coaxial cable for a rectifier comprises the following steps:
adding 30g of phenol and 250mL of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the water bath temperature to be 55 ℃, then dropwise adding 50mL of sodium hydroxide solution with mass fraction of 2%, keeping the temperature for 30min after the dropwise adding is finished, then heating to 80 ℃ for reaction for 1.5h, then adding 0.6g of ethyl allophanate for reaction for 25min, adding 50mL of pentaerythritol phosphate with mass fraction of 5%, continuing to keep the temperature for 25min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation and dehydration to obtain modified phenolic resin;
weighing 90g of modified phenolic resin, 0.7g of foaming agent, 20g of modified montmorillonite modified by cetyl trimethyl ammonium bromide, 2g of ammonium polyphosphate and 0.7g of curing agent according to the weight; adding a foaming agent, modified montmorillonite and ammonium polyphosphate into modified phenolic resin for mixing, performing ultrasonic dispersion for 4 minutes, and stirring and mixing for 4 minutes to obtain a composite material; adding the composite material into a self-made foaming cup, adding a curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mold, and finally placing the mold into an electrothermal blowing drying oven at 60 ℃ for solidification;
the inner insulating layer is wrapped on the outer side of the inner conductor, the outer conductor is wrapped on the inner insulating layer, the wrapping tape is wrapped on the outer conductor, and the sheath is wrapped on the wrapping tape.
Comparative example 1:
the modified phenolic resin in example 5 was replaced with a conventional phenolic resin; the rest raw materials and the preparation process are unchanged.
Comparative example 2:
adding lignin into the modified phenolic resin in the embodiment 6; the rest raw materials and the preparation process are unchanged.
The phenolic resin foam materials obtained in examples 5 to 6 and comparative examples 1 to 2 were subjected to the following performance tests;
the foaming section of the phenolic resin foam was observed by enlarging 50 times with a scanning electron microscope. The limiting oxygen index is measured by an oxygen index meter according to the test standard GB/T2406.2-2009, and the compressive strength is measured by a universal tester according to the standard GB/T8813-2008; impact strength was measured by an impact tester, with reference to GB/T1043-1993 standard.
The results are shown in the following table:
as can be seen from the data in the table, in examples 5 to 6, the addition of the modified phenolic resin not only has compact and uniform cells and higher closed porosity, but also has obviously improved flame retardance and mechanical property; the phenolic resin is modified, the mechanical property and the flame retardance are obviously improved, and then the phenolic resin enters the modified montmorillonite layer to have a certain coating effect, so that the performances of the phenolic resin are further improved, and the flame retardance and the mechanical property of the phenolic resin are not obviously improved by adding lignin in comparative example 2.
The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (4)
1. The preparation method of the special double-conductor coaxial cable for the rectifier is characterized by comprising the following steps of: wrapping an inner insulating layer on the outer side of the inner conductor, wrapping an outer conductor on the outer side of the inner insulating layer, wrapping a wrapping belt on the outer conductor, and wrapping a sheath on the wrapping belt;
the inner insulating layer is prepared by the following steps:
step one, weighing 90-100 parts of modified phenolic resin, 0.7-0.9 part of foaming agent, 20-30 parts of modified montmorillonite, 2-6 parts of ammonium polyphosphate and 0.7-0.9 part of curing agent according to parts by weight;
adding the foaming agent, the modified montmorillonite and the ammonium polyphosphate into the modified phenolic resin for mixing, performing ultrasonic dispersion for 4-6 minutes, and stirring and mixing for 4-6 minutes to obtain a composite material;
adding the composite material into a self-made foaming cup, adding a curing agent, rapidly and uniformly stirring, pouring the stirred foaming material into a preheated mold, and finally placing the mold into an electrothermal blowing drying oven at 60 ℃ for solidification;
the modified phenolic resin is prepared by the following steps: adding 30-40 parts of phenol and 20-30 parts of formaldehyde solution into a three-neck flask with a stirrer, a condenser pipe and a thermometer, controlling the temperature of a water bath to be 55-65 ℃, then dropwise adding 5-10 parts of sodium hydroxide solution, keeping the temperature for 30-40min after the dropwise adding is finished, heating to 80-90 ℃ to react for 1.5-2.5h, then adding 0.6-1.1 part of ethyl allophanate to react for 25-35min, adding 0.5-1 part of pentaerythritol phosphate, continuously keeping the temperature for 25-35min, finally cooling and discharging, adjusting the pH value of the system to be neutral, and carrying out reduced pressure distillation dehydration to obtain the modified phenolic resin.
2. The method for manufacturing the double-conductor coaxial cable special for the rectifier, according to claim 1, wherein the mass fraction of the sodium hydroxide solution is 20%.
3. The method for preparing a dual-conductor coaxial cable special for a rectifier according to claim 1, wherein the modified montmorillonite is modified by cetyl trimethyl ammonium bromide.
4. The preparation method of the special double-conductor coaxial cable for the rectifier, according to claim 1, is characterized in that the curing agent comprises p-benzoic acid, phosphoric acid and water according to the mass ratio of 2:1:1, mixing and preparing.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387541A (en) * | 2014-11-06 | 2015-03-04 | 聊城大学 | Toughened modified phenolic foam and preparation method thereof |
| CN111403098A (en) * | 2020-04-29 | 2020-07-10 | 安徽长鹿特种电缆有限公司 | Coaxial cable structure of double-conductor |
| CN211699824U (en) * | 2020-04-29 | 2020-10-16 | 安徽长鹿特种电缆有限公司 | Coaxial cable structure of double-conductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2575988B (en) * | 2018-07-30 | 2020-07-22 | Kingspan Holdings Irl Ltd | Phenolic foam and method of manufacture thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104387541A (en) * | 2014-11-06 | 2015-03-04 | 聊城大学 | Toughened modified phenolic foam and preparation method thereof |
| CN111403098A (en) * | 2020-04-29 | 2020-07-10 | 安徽长鹿特种电缆有限公司 | Coaxial cable structure of double-conductor |
| CN211699824U (en) * | 2020-04-29 | 2020-10-16 | 安徽长鹿特种电缆有限公司 | Coaxial cable structure of double-conductor |
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