CN112778616A - Smooth halogen-free low-smoke flame-retardant cable material and preparation method thereof - Google Patents
Smooth halogen-free low-smoke flame-retardant cable material and preparation method thereof Download PDFInfo
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- CN112778616A CN112778616A CN202011475983.6A CN202011475983A CN112778616A CN 112778616 A CN112778616 A CN 112778616A CN 202011475983 A CN202011475983 A CN 202011475983A CN 112778616 A CN112778616 A CN 112778616A
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- retardant
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- 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 title claims abstract description 92
- 239000003063 flame retardant Substances 0.000 title claims abstract description 92
- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000779 smoke Substances 0.000 title claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 7
- 229940024546 aluminum hydroxide gel Drugs 0.000 claims description 29
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 22
- 229920005672 polyolefin resin Polymers 0.000 claims description 17
- 239000003963 antioxidant agent Substances 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 14
- 239000000084 colloidal system Substances 0.000 claims description 14
- 238000004108 freeze drying Methods 0.000 claims description 14
- 229940024545 aluminum hydroxide Drugs 0.000 claims description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 13
- 239000000314 lubricant Substances 0.000 claims description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 10
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 claims description 9
- 229920001577 copolymer Polymers 0.000 claims description 9
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 9
- 238000011049 filling Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000000859 sublimation Methods 0.000 claims description 7
- 230000008022 sublimation Effects 0.000 claims description 7
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000012429 reaction media Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 8
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 7
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 description 5
- 239000003508 Dilauryl thiodipropionate Substances 0.000 description 5
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 239000012856 weighed raw material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012796 inorganic flame retardant Substances 0.000 description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- NEVDHZAXJDJVKN-UHFFFAOYSA-N dodecyl propanoate Chemical compound CCCCCCCCCCCCOC(=O)CC.CCCCCCCCCCCCOC(=O)CC NEVDHZAXJDJVKN-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011369 resultant mixture Substances 0.000 description 2
- 239000012748 slip agent Substances 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- VETPHHXZEJAYOB-UHFFFAOYSA-N 1-n,4-n-dinaphthalen-2-ylbenzene-1,4-diamine Chemical compound C1=CC=CC2=CC(NC=3C=CC(NC=4C=C5C=CC=CC5=CC=4)=CC=3)=CC=C21 VETPHHXZEJAYOB-UHFFFAOYSA-N 0.000 description 1
- PRWJPWSKLXYEPD-UHFFFAOYSA-N 4-[4,4-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butan-2-yl]-2-tert-butyl-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(C)CC(C=1C(=CC(O)=C(C=1)C(C)(C)C)C)C1=CC(C(C)(C)C)=C(O)C=C1C PRWJPWSKLXYEPD-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001679 gibbsite Inorganic materials 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 239000012170 montan wax Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 238000005199 ultracentrifugation Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- 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
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
-
- 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
- H01B3/44—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 vinyl resins; acrylic resins
- H01B3/441—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 vinyl resins; acrylic resins from alkenes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a smooth halogen-free low-smoke flame-retardant cable material and a preparation method thereof, belonging to the technical field of cable materials. The preparation method comprises the following steps: preparing a high-dispersity flame retardant; carrying out ultrasonic treatment on the prepared high-dispersity flame retardant and the slipping agent together; mixing and banburying the high-dispersity flame retardant and the slipping agent subjected to ultrasonic treatment with other raw materials, extruding, granulating, and cooling to obtain the slipping type halogen-free low-smoke flame-retardant cable material. According to the invention, the high-dispersity flame retardant is prepared and is subjected to ultrasonic treatment together with the slipping agent, so that the surface energy of the nano flame retardant powder is further weakened, the dispersing performance of the flame retardant and the slipping agent is improved, the agglomeration of flame retardant particles is prevented, and the slipping performance and the surface gloss of the cable material are further improved.
Description
Technical Field
The invention relates to a smooth halogen-free low-smoke flame-retardant cable material and a preparation method thereof, belonging to the technical field of cable materials.
Background
With the development of the power and electronic information industry, the use amount of the cable serving as a transmission medium is increased sharply, and a cable sheath coated outside the cable plays the role of insulation and protection on the cable so as to ensure the physical and mechanical properties of the cable, so that the cable can adapt to the laying conditions and the environmental aging, and is favorable for maintaining the operation reliability and the long service life. Along with the improvement of the requirements on the safety performance of the cable, the flame retardant performance of the cable also receives great attention, and the flame retardant performance is mainly reflected in that: when a fire disaster occurs, the combustion can be limited in a local range, the fire disaster does not spread, other equipment is protected from being affected by the fire disaster, and larger loss is avoided. At present, the flame retardant performance of a cable is usually realized by adding a flame retardant into a cable sheath material, the flame retardant comprises an organic flame retardant and an inorganic flame retardant, the organic flame retardant is represented by a bromine system, a phosphorus-nitrogen system, a nitrogen system, red phosphorus and a compound, the inorganic flame retardant is mainly a flame retardant such as antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon system and the like, the organic flame retardant has better affinity, but has the defect difficult to solve in the aspect of environmental protection and safety, the inorganic flame retardant is large in dosage when being added, the mechanical performance of the cable material is easily influenced, the problems of casting, rough surface and the like can be caused in the processing process, and the friction coefficient of the cable is higher. In the practical application process, the cable is easy to scratch or peel off the surface layer due to friction, collision and the like, so that potential safety hazards are generated.
In the prior art, the cable surface is made to be smooth by adding the slipping agent into the cable material, the addition of the slipping agent is beneficial to reducing the friction coefficient of the cable material, improving the anti-blocking property of the cable material and improving the performance of the cable, but the problem of poor dispersibility of the flame retardant in the cable material cannot be thoroughly solved by directly adding the slipping agent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a smooth halogen-free low-smoke flame-retardant cable material and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme: the preparation method of the smooth halogen-free low-smoke flame-retardant cable material comprises the following steps:
s1, preparing a high-dispersity flame retardant, wherein the high-dispersity flame retardant is a nano aluminum hydroxide flame retardant.
S2, adding a slipping agent into the high-dispersity flame retardant prepared in the S1, and carrying out ultrasonic treatment on the added mixture.
S3, mixing and banburying the ultrasonically treated high-dispersity flame retardant and the slipping agent with other raw materials, extruding and granulating, and cooling to obtain the slipping type halogen-free low-smoke flame-retardant cable material.
Further, the preparation of the high-dispersibility flame retardant in S1 comprises the steps of:
and S101, adding an excessive ammonia water solution into the aluminum chloride aqueous solution, and reacting to obtain a colloid.
And S102, carrying out hydrothermal reaction on the colloid obtained in the step S101, and reacting under the conditions that the pressure is 40-60 MPa and the temperature is 250-350 ℃ to obtain the aluminum hydroxide gel.
S103, carrying out freeze drying on the aluminum hydroxide gel obtained in the S102 to obtain the high-dispersibility flame retardant.
Further, in S102, water is used as a reaction medium in the hydrothermal reaction, and the filling degree is 80-90%.
Further, the particle size of the aluminum hydroxide gel obtained in S102 is 3-6 nm.
Further, the freeze drying process comprises a pre-cooling stage, a freezing stage, a sublimation stage and a drying stage, wherein the pre-cooling stage cools the aluminum hydroxide gel to 2-5 ℃, the freezing stage places the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 12.5-13.5 Pa for 2-3 h, the sublimation stage reduces the pressure to 1-1.5 Pa, the aluminum hydroxide gel is kept at the temperature of minus 60 ℃ for 8-10 h, and the drying stage heats the powder to 25-30 ℃.
Further, in the step S2, the ultrasonic treatment is carried out under the environment with the frequency of 20-25 KHz and the power of 2600-3000W.
Further, in the step S2, the slip agent in the mixture of the high-dispersibility flame retardant and the slip agent during the ultrasonic treatment accounts for 0.05-0.3% of the total amount of the mixture.
Further, the raw materials for mixing and banburying in the step S3 comprise the following raw materials in parts by weight: 80-100 parts of polyolefin resin, 150-190 parts of high-dispersity flame retardant and slipping agent, 1.5-2 parts of antioxidant and 1.5-2 parts of lubricant.
Further, the polyolefin resin comprises 50-60 parts of ethylene-vinyl acetate copolymer, 20-25 parts of metallocene polyethylene, 13-15 parts of maleic anhydride grafted ethylene-octene copolymer and 5-10 parts of polyolefin elastomer.
The invention also provides a high-dispersity flame retardant prepared by the preparation method.
The invention has the beneficial effects that:
according to the invention, the high-dispersity flame retardant is prepared, and the high-dispersity flame retardant and the slipping agent are subjected to ultrasonic treatment, so that the dispersing performance of the flame retardant is improved, the surface energy of nano flame retardant powder is weakened, the agglomeration of aluminum hydroxide particles is favorably prevented, the sufficient dispersion of the slipping agent in aluminum hydroxide is promoted, the dispersion of the aluminum hydroxide and the slipping agent in a cable material is further promoted, the slipping performance and the surface gloss of the cable material are favorably improved, the wear resistance and the scratch resistance of the cable material are improved, the breakage of a plastic melt in the processing and preparation process is eliminated, the accumulation of a die head is reduced, and the impact strength and the tensile strength of the surface of a cable are favorably improved. Meanwhile, the high-dispersity flame retardant is prepared by a hydrothermal method and freeze drying, the prepared aluminum hydroxide colloid nano particles are in the range of 3-6 nm, the surface energy of the particle size is remarkably reduced after subsequent ultrasonic dispersion with the slipping agent, the dispersion effect is further improved, hard agglomeration generated in drying of the aluminum hydroxide particles is reduced, the prepared cable material is good in release effect, the flame retardant and the slipping agent are uniformly dispersed in the cable material, the insulation performance of the electric wire and cable is improved, the friction coefficient of the electric wire and cable is reduced, the friction between the cable and a pipeline is reduced, and further the damage of the cable in the laying process is reduced.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a preparation method of a smooth halogen-free low-smoke flame-retardant cable material and the cable material prepared by the same, wherein the preparation method comprises the following steps:
s1, preparing the high-dispersity flame retardant which is a nano aluminum hydroxide flame retardant. The preparation method of the high-dispersity flame retardant comprises the following steps:
s101, adding excessive ammonia water solution into aluminum chloride aqueous solution, reacting to obtain colloid, washing the colloid with distilled water to remove Cl-And obtaining the aluminum hydroxide colloid.
S102, carrying out hydrothermal reaction on the washed colloid, and reacting under the conditions that the pressure is 40-60 MPa and the temperature is 250-350 ℃ to obtain the aluminum hydroxide gel. The hydrothermal reaction takes water as a reaction medium, the filling degree is 80-90%, the reaction time is 5.5-6.5 h, the particle size of the aluminum hydroxide gel obtained after the reaction is 3-6 nm, and the aluminum hydroxide gel obtained after the reaction is repeatedly washed by distilled water.
S103, freeze-drying the washed aluminum hydroxide gel, wherein the freeze-drying process comprises a pre-cooling stage, a freezing stage, a sublimation stage and a drying stage, the pre-cooling stage cools the aluminum hydroxide gel to 2-5 ℃, the freezing stage places the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 12.5-13.5 Pa for 2-3 h, the sublimation stage reduces the pressure to 1-1.5 Pa, the temperature is kept at minus 60 ℃ for 8-10 h, and the drying stage heats the powder to 25-30 ℃ to obtain the high-dispersibility flame retardant.
S2, adding a slipping agent into the high-dispersity flame retardant prepared in the S1, and carrying out ultrasonic treatment on the added mixture, wherein the slipping agent in the mixture of the high-dispersity flame retardant and the slipping agent accounts for 0.05-0.3% of the total amount of the mixture, and the ultrasonic treatment is carried out under the environment with the frequency of 20-25 KHz and the power of 2600-3000W.
S3, mixing and banburying the ultrasonically treated high-dispersity flame retardant and the slipping agent with other raw materials, extruding and granulating, and cooling to obtain the slipping type halogen-free low-smoke flame-retardant cable material. The raw materials of the smooth halogen-free low-smoke flame-retardant cable material comprise, by weight: 80-100 parts of polyolefin resin, 150-190 parts of high-dispersity flame retardant and slipping agent, 1.5-2 parts of antioxidant and 1.5-2 parts of lubricant. The high-dispersity flame retardant and the slipping agent are materials subjected to ultrasonic treatment in S2, the polyolefin resin comprises 50-60 parts of ethylene-vinyl acetate copolymer, 20-30 parts of metallocene polyethylene, 13-15 parts of maleic anhydride grafted ethylene-octene copolymer and 5-10 parts of polyolefin elastomer, and the content of vinyl acetate in the ethylene-vinyl acetate copolymer adopted by the invention is 28%. The slipping agent used in the method can be at least one or any several of oleamide, erucamide or calcium stearate, the antioxidant can be antioxidant 1010, antioxidant CA, dilauryl thiodipropionate or antioxidant DNP, and the lubricant can be paraffin, montan wax, polyethylene wax or silicone. The banburying temperature of the invention is 150-160 ℃, in the extrusion process, the twin-screw temperature is 100-145 ℃, the single-screw temperature is 110-125 ℃, the head temperature is 120-150 ℃, the twin-screw frequency is 20-35 Hz, the single-screw frequency is 20-40 Hz, the feeding frequency is 24-29 Hz, the twin-screw current is 180-220A, the single-screw current is 50-80A, the feeding current is 7-12A, and the twin-screw feed opening keeps the material temperature at 170-195 ℃.
Example one
The embodiment provides a preparation method of a smooth halogen-free low-smoke flame-retardant cable material and the cable material prepared by the same, and the preparation method comprises the following steps:
s1, preparing the high-dispersity flame retardant, wherein the preparation method comprises the following steps:
s101, gradually adding ammonia water into an aluminum chloride aqueous solution until the ammonia water is excessive, and reacting to generate colloid, wherein the reaction equation is as follows: AlCl3+3NH4·OH→Al(OH)3↓+3NH4Cl, separating the colloid from the solvent, washing the separated colloid with distilled water repeatedly to remove the chloride ions in the colloidAnd obtaining the aluminum hydroxide colloid.
And S102, carrying out hydrothermal reaction on the aluminum hydroxide colloid obtained in the S101, taking water as a reaction medium and 80% of filling degree, reacting for 5.5h under the environment of 40MPa of pressure and 350 ℃, carrying out ultracentrifugation separation after the reaction, and repeatedly washing gel with distilled water to obtain aluminum hydroxide gel.
S103, carrying out freeze drying on the washed aluminum hydroxide gel, wherein the freeze drying process comprises the steps of cooling the aluminum hydroxide gel to 5 ℃, then placing the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 12.5Pa for 2h, then reducing the pressure to 1Pa, keeping the temperature of minus 60 ℃ for 8h for sublimation, and heating the powder to 30 ℃ to obtain the high-dispersity flame retardant.
S2, mixing the high-dispersity flame retardant prepared in the S1 with a slipping agent, wherein the slipping agent adopted in the embodiment is oleamide, and the slipping agent accounts for 0.3% of the mixture by mass percent, placing the mixture in a sound field, and treating the mixture by using ultrasonic waves with the frequency of 20KHz and the power of 3000W.
S3, mixing and banburying 190kg of the ultrasonically treated high-dispersity flame retardant and the ultrasonically treated slipping agent with 100kg of polyolefin resin, 1.5kg of antioxidant and 1.5kg of lubricant, wherein the polyolefin resin adopted in the embodiment comprises 52kg of ethylene-vinyl acetate copolymer, 30kg of metallocene polyethylene, 15kg of maleic anhydride grafted ethylene-octene copolymer and 5kg of polyolefin elastomer 8200, the ethylene-vinyl acetate copolymer is a product with the vinyl acetate content of 28%, the antioxidant comprises 0.8 part of antioxidant 1010 and 0.7 part of vulcanized dilauryl dipropionate, and the lubricant adopts silicone master batches. The banburying temperature is 151 +/-1 ℃, the powder is respectively swept at the temperature of 100-110 ℃ and 120-130 ℃, the banburying is carried out for 10min, and then the two-stage extruder is used for extrusion granulation, the twin-screw temperature during extrusion is 145 ℃, the single-screw temperature is 125 ℃, the head temperature is 150 ℃, the twin-screw frequency is 30Hz, the single-screw frequency is 40Hz, the feeding frequency is 29Hz, the twin-screw current is 220A, the single-screw current is 80A, and the feeding current is 12A, and the material temperature at the feed opening is kept at 195 ℃. After cooling, the square granular smooth halogen-free low-smoke flame-retardant polyolefin cable material with the thickness of 4mm multiplied by 3mm is obtained, the cable material has good plasticization and uniform color, and has no obvious impurities.
Example two
The difference between the present embodiment and the first embodiment is mainly as follows: in the hydrothermal reaction of S102, the reaction was carried out for 6.5 hours under a pressure of 60MPa and a temperature of 250 ℃ with a degree of filling of 90%. In the freeze drying process of S103, firstly, cooling the aluminum hydroxide gel to 2 ℃, then placing the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 13.5Pa for 3h, then reducing the pressure to 1.5Pa, preserving the heat at the temperature of minus 60 ℃ for 10h, and heating the powder to 25 ℃ to obtain the high-dispersity flame retardant. In S2, the slipping agent is added in an amount of 0.05% by mass of the mixture, and the mixture is subjected to ultrasonic treatment in a sound field with a frequency of 25Hz and a power of 2600W.
In S3, the raw materials were weighed in the following amounts: 170kg of the mixture obtained in S2, 100kg of polyolefin resin, 1.5kg of antioxidant and 2kg of lubricant, the polyolefin resin used in this example comprised 60kg of ethylene-vinyl acetate copolymer, 20kg of metallocene polyethylene, 13kg of maleic anhydride-grafted ethylene-octene copolymer and 7kg of polyolefin elastomer 8200, and the antioxidant comprised 0.9kg of antioxidant 1010 and 0.6kg of dilauryl thiodipropionate. Banburying the weighed raw materials at the banburying temperature of 159 +/-1 ℃ for 10min, extruding and granulating, wherein the twin-screw temperature during extrusion is 100 ℃, the single-screw temperature is 110 ℃, the head temperature is 120 ℃, the twin-screw frequency is 20Hz, the single-screw frequency is 20Hz, the feeding frequency is 24Hz, the twin-screw current is 180A, the single-screw current is 50A, and the feeding current is 7A, keeping the temperature of a feeding port at 170 ℃, and the rest is the same as the first embodiment.
EXAMPLE III
The difference between the present embodiment and the first embodiment is mainly as follows: in the hydrothermal reaction of S102, the reaction was carried out for 6 hours under a pressure of 50MPa and a temperature of 300 ℃ with a degree of filling of 85%. In the freeze drying process of S103, firstly, cooling the aluminum hydroxide gel to 4 ℃, then placing the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 13Pa for 2.5h, then reducing the pressure to 1.2Pa, preserving the heat at the temperature of minus 60 ℃ for 9h, and heating the powder to 28 ℃ to obtain the high-dispersity flame retardant. In S2, the slipping agent is added in an amount of 0.2% by mass based on the mixture, and the mixture is subjected to ultrasonic treatment in a sound field having a frequency of 22Hz and a power of 2800W.
In S3, the raw materials were weighed in the following amounts: 180kg of the resultant mixture of S2, 100kg of a polyolefin resin, 1.8kg of an antioxidant and 1.8kg of a lubricant, the polyolefin resin used in this example comprised 50kg of an ethylene-vinyl acetate copolymer, 25kg of a metallocene polyethylene, 15kg of a maleic anhydride-grafted ethylene-octene copolymer and 10kg of a polyolefin elastomer 8200, the antioxidant comprised 1kg of antioxidant 1010 and 0.8kg of dilauryl thiodipropionate. Banburying the weighed raw materials at the banburying temperature of 155 +/-1 ℃ for 10min, extruding and granulating, wherein the twin-screw temperature during extrusion is 125 ℃, the single-screw temperature is 115 ℃, the head temperature is 135 ℃, the twin-screw frequency is 25Hz, the single-screw frequency is 30Hz, the feeding frequency is 27Hz, the twin-screw current is 200A, the single-screw current is 65A, and the feeding current is 10A, keeping the temperature of a feeding port at 185 ℃, and the rest is the same as the first embodiment.
Example four
The difference between the present embodiment and the first embodiment is mainly as follows: in the hydrothermal reaction of S102, the reaction was carried out for 6 hours under an atmosphere of 55MPa pressure and 330 ℃ with a degree of filling of 85%. In the freeze drying process of S103, firstly, cooling the aluminum hydroxide gel to 3 ℃, then placing the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 13Pa for 2.5h, then reducing the pressure to 1.3Pa, preserving the heat at the temperature of minus 60 ℃ for 9h, and heating the powder to 27 ℃ to obtain the high-dispersity flame retardant. In S2, the slipping agent is added in an amount of 0.15% by mass based on the mixture, and the mixture is subjected to ultrasonic treatment in a sound field having a frequency of 23Hz and a power of 2800W.
In S3, the raw materials were weighed in the following amounts: 190kg of the resultant mixture of S2, 100kg of a polyolefin resin, 1.7kg of an antioxidant and 1.5kg of a lubricant, the polyolefin resin used in this example comprised 57kg of an ethylene-vinyl acetate copolymer, 25kg of a metallocene polyethylene, 13kg of a maleic anhydride-grafted ethylene-octene copolymer and 5kg of a polyolefin elastomer 8200, the antioxidant comprising 0.9kg of antioxidant 1010 and 0.8kg of dilauryl thiodipropionate. Banburying the weighed raw materials at the banburying temperature of 155 +/-1 ℃ for 10min, extruding and granulating, wherein the twin-screw temperature during extrusion is 130 ℃, the single-screw temperature is 120 ℃, the head temperature is 140 ℃, the twin-screw frequency is 25Hz, the single-screw frequency is 30Hz, the feeding frequency is 26Hz, the twin-screw current is 195A, the single-screw current is 65A and the feeding current is 9A, and the temperature of a feeding port is kept at 180 ℃, and the rest is the same as that of the first embodiment.
EXAMPLE five
The difference between the present embodiment and the first embodiment is mainly as follows: in the hydrothermal reaction of S102, the reaction was carried out for 6 hours under an atmosphere of 45MPa pressure and 280 ℃ with a degree of filling of 85%. In the freeze drying process of S103, firstly, cooling the aluminum hydroxide gel to 5 ℃, then placing the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 13Pa for 2.5h, then reducing the pressure to 1Pa, preserving the heat at the temperature of minus 60 ℃ for 9h, and heating the powder to 29 ℃ to obtain the high-dispersity flame retardant. In S2, the slipping agent is added in an amount of 0.1% by weight of the mixture, and the mixture is subjected to ultrasonic treatment in a sound field having a frequency of 25Hz and a power of 3000W.
In S3, the raw materials were weighed in the following amounts: 150kg of the mixture produced in S2, 88kg of a polyolefin resin comprising 50kg of an ethylene-vinyl acetate copolymer, 20kg of metallocene polyethylene, 13kg of a maleic anhydride-grafted ethylene-octene copolymer and 5kg of a polyolefin elastomer 8200, 2kg of an antioxidant comprising 1.1kg of antioxidant 1010 and 0.9kg of sulfurized dilauryl dipropionate, 2kg of an antioxidant and 1.8kg of a lubricant. Banburying the weighed raw materials at the banburying temperature of 155 +/-1 ℃ for 10min, extruding and granulating, wherein the twin-screw temperature during extrusion is 120 ℃, the single-screw temperature is 120 ℃, the head temperature is 130 ℃, the twin-screw frequency is 25Hz, the single-screw frequency is 30Hz, the feeding frequency is 26Hz, the twin-screw current is 210A, the single-screw current is 70A, and the feeding current is 10A, keeping the temperature of a feeding port at 190 ℃, and the rest is the same as the first embodiment.
Comparative example
This comparative example provides a halogen-free low-smoke flame-retardant cable material: 100kg of polyolefin resin, 180kg of flame retardant, 0.18kg of slipping agent, 1.5kg of antioxidant and 1.5kg of lubricant are weighed, the polyolefin resin adopted in the comparative example comprises 55kg of ethylene-vinyl acetate copolymer, 25kg of metallocene polyethylene, 13kg of maleic anhydride grafted ethylene-octene copolymer and 7kg of polyolefin elastomer, the flame retardant adopted in the embodiment is a commercially available aluminum hydroxide flame retardant, the slipping agent adopts oleamide, the antioxidant comprises 0.8kg of antioxidant 1010 and 0.7kg of dilauryl thiodipropionate, and the lubricant adopts silicone master batch. And (2) putting the weighed materials into an internal mixer for internal mixing, carrying out internal mixing at 155 +/-1 ℃ for 10min, then extruding and granulating, wherein the twin-screw temperature during extrusion is 125 ℃, the single-screw temperature is 120 ℃, the head temperature is 130 ℃, the twin-screw frequency is 25Hz, the single-screw frequency is 30Hz, the feeding frequency is 26Hz, the twin-screw current is 200A, the single-screw current is 60A, and the feeding current is 10A, and keeping the temperature of a feeding port at 190 ℃ to obtain the halogen-free low-smoke flame-retardant cable material.
Product detection
The cable materials prepared in the first to fifth examples and the comparative example are tested according to the methods of GB/T2951.11-2008 and GB/T2951.12-2008, the mechanical properties, the thermal aging test performance, the resistivity and the oxygen index of the cable materials are tested, and the test results are shown in Table 1.
Table 1 test results of cable materials prepared in examples one to five and comparative example
As can be seen from Table 1, the appearance of the smooth halogen-free low-smoke flame-retardant polyolefin cable material prepared according to the scheme of the invention is smooth and bright, the surface of the cable material manufactured according to the comparative example is slightly rough, the dosage of the slipping agent added in the comparative example is similar to that of the cable material manufactured according to the example V, but the dispersing effect of the slipping agent in the cable material manufactured according to the comparative example is obviously not as good as that of the slipping agent in the cable material manufactured according to the example V. The cable materials prepared in the embodiments are also improved in mechanical properties such as tensile strength and elongation at break compared with the comparative examples, and the resistivity and the oxygen index of the cable materials prepared in the embodiments are higher than those of the cable materials prepared in the comparative examples, so that the cable materials prepared in the embodiments are better than those of the comparative examples in electrical properties and flame retardant properties. According to the invention, the nano aluminum hydroxide powder is prepared by adopting a hydrothermal method and freeze drying, and is subjected to ultrasonic dispersion treatment after being mixed with the slipping agent, so that the high-dispersity nano aluminum hydroxide powder and the slipping agent can be obtained, the dispersion of the nano aluminum hydroxide powder is promoted, the agglomeration of the nano aluminum hydroxide powder is avoided, the uniform dispersion of the slipping agent in the flame retardant is promoted, the appearance of the prepared cable finished product is smooth, the cable is wear-resistant and scratch-resistant, and the mechanical property, the electrical property and the flame retardant property of the cable are improved.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material is characterized by comprising the following steps of: the method comprises the following steps:
s1, preparing a high-dispersity flame retardant, wherein the high-dispersity flame retardant is a nano aluminum hydroxide flame retardant;
s2, adding a slipping agent into the high-dispersity flame retardant prepared in the S1, and carrying out ultrasonic treatment on the added mixture;
s3, mixing and banburying the ultrasonically treated high-dispersity flame retardant and the slipping agent with other raw materials, extruding and granulating, and cooling to obtain the slipping type halogen-free low-smoke flame-retardant cable material.
2. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 1, characterized in that: the preparation of the high-dispersibility flame retardant in S1 comprises the following steps:
s101, adding an excessive ammonia water solution into an aluminum chloride aqueous solution, and reacting to obtain a colloid;
s102, carrying out hydrothermal reaction on the colloid obtained in the step S101, and reacting under the conditions that the pressure is 40-60 MPa and the temperature is 250-350 ℃ to obtain aluminum hydroxide gel;
s103, carrying out freeze drying on the aluminum hydroxide gel obtained in the S102 to obtain the high-dispersibility flame retardant.
3. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 2, characterized in that: in S102, water is used as a reaction medium in the hydrothermal reaction, and the filling degree is 80-90%.
4. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 2, characterized in that: the particle size of the aluminum hydroxide gel obtained in the step S102 is 3-6 nm.
5. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 2, characterized in that: the freeze drying process comprises a pre-cooling stage, a freezing stage, a sublimation stage and a drying stage, wherein the pre-cooling stage cools the aluminum hydroxide gel to 2-5 ℃, the freezing stage places the aluminum hydroxide gel in an environment with the temperature of minus 40 ℃ and the pressure of 12.5-13.5 Pa for 2-3 h, the sublimation stage reduces the pressure to 1-1.5 Pa, the temperature is kept at minus 60 ℃ for 8-10 h, and the drying stage heats the powder to 25-30 ℃.
6. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 1, characterized in that: in the step S2, the ultrasonic treatment is carried out under the environment with the frequency of 20-25 KHz and the power of 2600-3000W.
7. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 1, characterized in that: in the S2, the slipping agent in the mixture of the high-dispersity flame retardant and the slipping agent during ultrasonic treatment accounts for 0.05-0.3% of the total amount of the mixture.
8. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 1, characterized in that: the raw materials for mixing and banburying in the S3 comprise the following raw materials in parts by weight: 80-100 parts of polyolefin resin, 150-190 parts of high-dispersity flame retardant and slipping agent, 1.5-2 parts of antioxidant and 1.5-2 parts of lubricant.
9. The preparation method of the smooth halogen-free low-smoke flame-retardant cable material according to claim 8, characterized in that: the polyolefin resin comprises 50-60 parts of ethylene-vinyl acetate copolymer, 20-25 parts of metallocene polyethylene, 13-15 parts of maleic anhydride grafted ethylene-octene copolymer and 5-10 parts of polyolefin elastomer.
10. The highly dispersible flame retardant prepared by the method according to any one of claims 1 to 9.
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| CN111635580A (en) * | 2020-05-25 | 2020-09-08 | 上海方之德新材料有限公司 | Anti-adhesion low-smoke halogen-free flame-retardant polyolefin cable material |
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| CN111690201A (en) * | 2020-07-23 | 2020-09-22 | 上海方之德新材料有限公司 | Low-friction low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof |
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