CN113956557A - Low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and preparation method thereof - Google Patents
Low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 56
- -1 polyethylene Polymers 0.000 title claims abstract description 50
- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 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 35
- 239000003063 flame retardant Substances 0.000 title claims abstract description 35
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 29
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 24
- 239000000806 elastomer Substances 0.000 claims abstract description 24
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 21
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 21
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 21
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229920001577 copolymer Polymers 0.000 claims abstract description 15
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 13
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 13
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 13
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 13
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 12
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 12
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 10
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 10
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 9
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound 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 abstract description 9
- 229920000578 graft copolymer Polymers 0.000 claims abstract description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000008117 stearic acid Substances 0.000 claims abstract description 9
- 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 claims abstract description 9
- 239000004595 color masterbatch Substances 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 5
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 19
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 10
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 238000012824 chemical production Methods 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 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 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000006353 environmental stress Effects 0.000 abstract description 2
- 229910052736 halogen Inorganic materials 0.000 abstract description 2
- 150000002367 halogens Chemical class 0.000 abstract description 2
- 229910001385 heavy metal Chemical class 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000221095 Simmondsia Species 0.000 description 1
- 235000004433 Simmondsia californica Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002468 ceramisation Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- 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
- 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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention discloses a low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and a preparation method thereof, wherein the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprises the following raw materials: 30-50 parts of high-density polyethylene, 20-40 parts of linear low-density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 5-16 parts of ethylene-octene copolymer elastomer, 8-12 parts of maleic anhydride graft copolymer elastomer, 1-2 parts of color master batch, 50-80 parts of nano ceramic shell forming agent, 15-30 parts of kaolin, 15-30 parts of aluminum hydroxide, 10-35 parts of magnesium hydroxide, 20-30 parts of zinc borate, 3-8 parts of nano montmorillonite, 1-2 parts of antioxidant and 0.5-1 part of stearic acid, wherein the parts are parts by weight. The cable material disclosed by the invention has excellent mechanical properties and environmental stress cracking resistance, the processing thickness of the outer sheath of the cable is greatly reduced, and the high-hardness ceramic formed shell is ensured to be formed in the combustion process of the material; the material does not contain any halogen and heavy metal salt compounds, so that the environment-friendly characteristic of the insulating material is ensured; the preparation method is simple and easy to operate.
Description
Technical Field
The invention relates to a low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and a preparation method thereof, belonging to the technical field of cable materials.
Background
Polyethylene (PE) has excellent processability, mechanical properties and electrical insulation properties, and is widely applied to the cable industry. However, the flame retardant property of PE is poor, and the manufactured cable is easy to burn and cause fire under external conditions such as high pressure, high temperature, discharge and the like, so that the PE plastic needs to be subjected to flame retardant treatment. Although there are many reports related to flame retardance of PE plastics, the problems of large addition amount of flame retardant, serious loss of mechanical properties and the like still exist.
Disclosure of Invention
The invention provides a low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and a preparation method thereof, wherein the flame retardant property of the material is obviously improved by combining a nano ceramic shell-forming agent, the material has excellent high-hardness shell-forming property, the Mohs hardness is 5.8-6.8, the thickness of the original cable sheath layer is reduced by about 50%, and the flame retardant property, the processing property, the physical and chemical properties and the like of the cable material can be considered at the same time.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprises the following raw materials: 30-50 parts of high-density polyethylene, 20-40 parts of linear low-density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 5-16 parts of ethylene-octene copolymer elastomer, 8-12 parts of maleic anhydride graft copolymer elastomer, 1-2 parts of color master batch, 50-80 parts of nano ceramic shell forming agent, 15-30 parts of kaolin, 15-30 parts of aluminum hydroxide, 10-35 parts of magnesium hydroxide, 20-30 parts of zinc borate, 3-8 parts of nano montmorillonite, 1-2 parts of antioxidant and 0.5-1 part of stearic acid, wherein the parts are parts by weight.
In order to have better ceramic shell forming performance, the nano ceramic shell forming agent is adopted, and the synergistic effect between the nano ceramic shell forming agent and other components is brought into play to the best by selecting the dosage, so that the processing performance and the physical and chemical properties of the material are ensured, and the high-hardness shell forming performance of the material is improved; the synergistic effect of the components can be further promoted by matching the high-density polyethylene and the linear low-density polyethylene with specific dosage, so that the obtained cable material has excellent processing performance and physical and chemical properties.
The raw material components and the use amount are selected, so that the material is ensured to have good processing performance, physical and chemical properties and high-hardness ceramization.
In order to further ensure the flame retardant effect and high-hardness shell formation of the cable material, the particle size of the nano ceramic shell forming agent is preferably 2-3 μm; the particle sizes of the aluminum hydroxide and the magnesium hydroxide are both 1-1.5 mu m.
In order to further ensure the low-temperature high-hardness ceramic shell forming flame retardant property of the cable material, the outer surface of the nano ceramic shell forming agent is coated by a single layer of silane coupling agent.
In order to further improve the flame retardant property of the cable material, the aluminum hydroxide and the magnesium hydroxide are both double-layer coated, the double-layer coating comprises an inner layer and an outer layer, the inner layer is coated on the outer surfaces of the aluminum hydroxide and the magnesium hydroxide, the outer layer is coated on the outer surface of the inner layer, the inner layers of the aluminum hydroxide and the magnesium hydroxide are both coated by high molecular polymers, and the outer layers of the aluminum hydroxide and the magnesium hydroxide are both coated by titanate coupling agents. Thus, the processing performance, the physical and chemical properties and the high-hardness ceramic shell forming performance of the cable material are further improved.
In order to improve the oxygen resistance of the material and simultaneously give consideration to the comprehensive performance of the material, the antioxidant comprises 0.5-1 part of tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and 0.5-1 part of 2, 4-di-tert-butylphenyl) phosphite triester, wherein the parts are parts by weight.
In order to further promote the improvement of flame retardant property and simultaneously promote the improvement of oxygen resistance and mechanical property, the raw material components of the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material further comprise: 1-2 parts of vinyl tri (beta-methoxyethoxy) silane.
In order to further ensure the processing performance and the physical and chemical properties of the cable material, the high-density polyethylene is L5850W produced by Dow in America; the linear low density polyethylene is produced by chemical production of SP2040 in Mitsui Japan; the ethylene-vinyl acetate copolymer is US DuPont 0910 HS; the ethylene-octene copolymer elastomer is Dow 8200; the maleic anhydride graft copolymer elastomer is a Shanghai long-polymerization compatilizer JCT-1P.
In order to enable the cable material to be more uniformly dispersed, and enable powder components in the cable material to be better dispersed so as to exert the advantages of the cable material and promote the flame-retardant synergistic effect among the components, the method adopts an advanced coating treatment technology, carries out granulation by an internal mixer and a double screw, and specifically comprises the following steps:
A. adding high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer elastomer, maleic anhydride graft copolymer elastomer and nano ceramic shell forming agent into a high-speed mixer, mixing for 10min at the rotating speed of 1500r/min, and extruding by a double-screw extrusion granulator to obtain composite premixed master batch;
B. adding the obtained composite premixed master batch into an internal mixer, adding aluminum hydroxide, magnesium hydroxide, kaolin, zinc borate, nano montmorillonite, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 2, 4-di-tert-butylphenyl) phosphite triester, stearic acid, vinyl tri (beta-methoxyethoxy) silane and the master batch, mixing, then carrying out two-stage granulation, and finally carrying out air cooling to obtain the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material.
The preparation method can fully mix all materials, obviously improve the uniformity of the obtained cable material, well overcome the defect of poor dispersibility of the existing inorganic powder, and ensure that the physical and chemical properties of the material are qualified and the high-hardness ceramic shell forming property is realized in the combustion process.
The prior art is referred to in the art for techniques not mentioned in the present invention.
The low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material disclosed by the invention has excellent mechanical properties and environmental stress cracking resistance, the processing thickness of the outer sheath of the cable is greatly reduced, and the high-hardness ceramic shell-forming of the material in the combustion process is ensured; the material does not contain any halogen and heavy metal salt compounds, so that the environment-friendly characteristic of the insulating material is ensured; the preparation method is simple and easy to operate.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the high density polyethylene was L5850W produced by dow, the linear low density polyethylene was SP2040 produced by chemical process in mitsui, the ethylene-vinyl acetate copolymer was du pont 0910HS, the ethylene-octene copolymer elastomer was dow 8200, the maleic anhydride graft copolymer elastomer was JCT-1P, the color master batch was kebo te black master batch 2762, the kaolin was jojoba JYB-80, the aluminum hydroxide was jabao 104LEO, the magnesium hydroxide was jabao H-5, the nano-montmorillonite was hoffman-DT 5, and the nano-ceramic crusting agent was shijiazhuang xiang (grade a, particle size 2-3 μm).
Example 1
The raw materials of the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprise the following components: 30 parts of high-density polyethylene, 30 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 8 parts of ethylene-octene copolymer elastomer, 10 parts of maleic anhydride grafted copolymer elastomer, 2 parts of color master batch, 60 parts of nano ceramic shell forming agent, 15 parts of kaolin, 30 parts of aluminum hydroxide, 13 parts of magnesium hydroxide, 25 parts of zinc borate, 5 parts of nano montmorillonite, 1 part of tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 1 part of 2, 4-di-tert-butylphenyl) phosphite triester, 1 part of stearic acid and 2 parts of vinyl tri (beta-methoxyethoxy) silane.
The preparation method of the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprises the following steps:
A. adding high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer elastomer, maleic anhydride graft copolymer elastomer and nano ceramic shell forming agent into a high-speed mixer, mixing for 10min at the rotating speed of 1500r/min, and extruding by a double-screw extruder at 150 ℃ to obtain a composite premixed master batch;
B. putting the obtained premixed master batch into an internal mixer, adding aluminum hydroxide, magnesium hydroxide, kaolin, zinc borate, nano montmorillonite, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 2, 4-di-tert-butylphenyl) phosphite triester, stearic acid, vinyl tri (beta-methoxyethoxy) silane and the master batch into the internal mixer for mixing, then carrying out double-stage granulation, and finally carrying out air cooling to obtain the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material; the temperature of each section is respectively as follows: the internal mixer is 140 ℃, the single-screw extrusion section is 100-110 ℃, and the double-screw extrusion section is 110-130 ℃.
Example 2
The raw materials of the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprise the following components: 40 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 15 parts of ethylene-vinyl acetate copolymer, 15 parts of ethylene-octene copolymer elastomer, 10 parts of maleic anhydride grafted copolymer elastomer, 2 parts of color master batch, 70 parts of nano ceramic shell forming agent, 20 parts of kaolin, 20 parts of aluminum hydroxide, 30 parts of magnesium hydroxide, 20 parts of zinc borate, 4 parts of nano montmorillonite, 1 part of tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 1 part of 2, 4-di-tert-butylphenyl) phosphite triester, 1 part of stearic acid and 2 parts of vinyl tri (beta-methoxyethoxy) silane. The preparation method is as in example 1.
Example 3
The raw materials of the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material comprise the following components: 40 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 15 parts of ethylene-vinyl acetate copolymer, 15 parts of ethylene-octene copolymer elastomer, 10 parts of maleic anhydride grafted copolymer elastomer, 2 parts of color master batch, 80 parts of nano ceramic shell forming agent, 30 parts of kaolin, 15 parts of aluminum hydroxide, 15 parts of magnesium hydroxide, 30 parts of zinc borate, 6 parts of nano montmorillonite, 1 part of tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 1 part of 2, 4-di-tert-butylphenyl) phosphite triester, 1 part of stearic acid and 2 parts of vinyl tri (beta-methoxyethoxy) silane. The preparation method is as in example 1. The properties of the materials prepared in the examples are measured in Table 1.
TABLE 1 Properties of the materials obtained in examples 1-3
It can be seen from the above experiment that:
1. the amount of the nano ceramic shell forming agent is required to be coordinated with the actual production, and the addition amount is 60-80 phr, so that a good shell forming effect can be achieved, the flame retardance of the material is ensured, and the material has excellent processing performance and is suitable for processing of a 45-type extruder, a 75-type extruder, a 120-type extruder and a 150-type extruder which are commonly used;
2. the particle size of the nano ceramic shell forming agent has important influence on powder dispersion, and the excessively small particle size causes material agglomeration to influence flame retardant shell forming property; the excessive particle size affects the processing surface and efficiency of the material;
3. the adopted magnesium hydroxide and aluminum hydroxide are products produced by the Yabao company, and the hexagonal sheet structure of the products can synergistically generate carbon.
Claims (8)
1. The low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material is characterized in that: the raw materials comprise the following components: 30-50 parts of high-density polyethylene, 20-40 parts of linear low-density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 5-16 parts of ethylene-octene copolymer elastomer, 8-12 parts of maleic anhydride graft copolymer elastomer, 1-2 parts of color master batch, 50-80 parts of nano ceramic shell forming agent, 15-30 parts of kaolin, 15-30 parts of aluminum hydroxide, 10-35 parts of magnesium hydroxide, 20-30 parts of zinc borate, 3-8 parts of nano montmorillonite, 1-2 parts of antioxidant and 0.5-1 part of stearic acid, wherein the parts are parts by weight.
2. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1, wherein: the particle size of the nano ceramic shell forming agent is 2-3 mu m; the particle sizes of the aluminum hydroxide and the magnesium hydroxide are both 1-1.5 mu m.
3. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1 or 2, wherein: the outer surface of the nano ceramic shell forming agent is coated by a single layer of silane coupling agent.
4. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1 or 2, wherein: the aluminum hydroxide and the magnesium hydroxide are both double-layer coatings, each double-layer coating comprises an inner layer and an outer layer, the inner layer is coated on the outer surfaces of the aluminum hydroxide and the magnesium hydroxide, the outer layer is coated on the outer surface of the inner layer, the inner layers of the aluminum hydroxide and the magnesium hydroxide are both coated by high molecular polymers, and the outer layers of the aluminum hydroxide and the magnesium hydroxide are both coated by titanate coupling agents.
5. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1 or 2, wherein: the antioxidant comprises: 0.5-1 part of pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 0.5-1 part of 2, 4-di-tert-butylphenyl) phosphite triester, wherein the parts are parts by weight.
6. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1 or 2, wherein: the raw material components also comprise: 1-2 parts of vinyl tri (beta-methoxyethoxy) silane.
7. The low-temperature shelling high-hardness ceramicized flame-retardant polyethylene cable material as claimed in claim 1 or 2, wherein: the high density polyethylene is L5850W produced by Dow, USA; the linear low density polyethylene is produced by chemical production of SP2040 in Mitsui Japan; the ethylene-vinyl acetate copolymer is US DuPont 0910 HS; the ethylene-octene copolymer elastomer is Dow 8200; the maleic anhydride graft copolymer elastomer is a Shanghai long-polymerization compatilizer JCT-1P.
8. The preparation method of the low-temperature shelling high-hardness ceramic flame-retardant polyethylene cable material as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
A. adding high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer elastomer, maleic anhydride graft copolymer elastomer and nano ceramic shell forming agent into a high-speed mixer, mixing for 10min at the rotating speed of 1500r/min, and extruding by a double-screw extrusion granulator to obtain composite premixed master batch;
B. adding the obtained composite premixed master batch into an internal mixer, adding aluminum hydroxide, magnesium hydroxide, kaolin, zinc borate, nano montmorillonite, tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 2, 4-di-tert-butylphenyl) phosphite triester, stearic acid, vinyl tri (beta-methoxyethoxy) silane and the master batch, mixing, then carrying out two-stage granulation, and finally carrying out air cooling to obtain the low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material.
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| CN116003899A (en) * | 2023-02-16 | 2023-04-25 | 广东安拓普聚合物科技有限公司 | Composite material based on bio-based polyethylene and preparation method thereof |
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