CN116836590A - Coated crosslinked polyethylene composition, crosslinkable polyethylene blend and composite article - Google Patents
Coated crosslinked polyethylene composition, crosslinkable polyethylene blend and composite article Download PDFInfo
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- CN116836590A CN116836590A CN202210299236.4A CN202210299236A CN116836590A CN 116836590 A CN116836590 A CN 116836590A CN 202210299236 A CN202210299236 A CN 202210299236A CN 116836590 A CN116836590 A CN 116836590A
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- 239000000203 mixture Substances 0.000 title claims abstract description 60
- -1 polyethylene Polymers 0.000 title claims abstract description 46
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 37
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 37
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 32
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 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 claims abstract description 40
- 239000003063 flame retardant Substances 0.000 claims abstract description 39
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 23
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 10
- 239000002216 antistatic agent Substances 0.000 claims abstract description 9
- 150000002978 peroxides Chemical class 0.000 claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims description 25
- 229920000647 polyepoxide Polymers 0.000 claims description 25
- 239000011159 matrix material Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 8
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 8
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 8
- 238000004132 cross linking Methods 0.000 claims description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- 229920001225 polyester resin Polymers 0.000 claims description 8
- 239000004645 polyester resin Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 7
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 4
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 claims description 4
- 239000004702 low-density polyethylene Substances 0.000 claims description 4
- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 claims description 4
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- JGBAASVQPMTVHO-UHFFFAOYSA-N 2,5-dihydroperoxy-2,5-dimethylhexane Chemical compound OOC(C)(C)CCC(C)(C)OO JGBAASVQPMTVHO-UHFFFAOYSA-N 0.000 claims description 2
- YKTNISGZEGZHIS-UHFFFAOYSA-N 2-$l^{1}-oxidanyloxy-2-methylpropane Chemical group CC(C)(C)O[O] YKTNISGZEGZHIS-UHFFFAOYSA-N 0.000 claims description 2
- AHRBAGVYCYNCBO-UHFFFAOYSA-N 2-[2,5-dimethyl-5-(2-phenylpropan-2-ylperoxy)hex-3-yn-2-yl]peroxypropan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C#CC(C)(C)OOC(C)(C)C1=CC=CC=C1 AHRBAGVYCYNCBO-UHFFFAOYSA-N 0.000 claims description 2
- KRDXTHSSNCTAGY-UHFFFAOYSA-N 2-cyclohexylpyrrolidine Chemical compound C1CCNC1C1CCCCC1 KRDXTHSSNCTAGY-UHFFFAOYSA-N 0.000 claims description 2
- SUDLAWBKAUEPOD-UHFFFAOYSA-N 3,6-bis(tert-butylperoxy)-3,6-dimethyloct-4-yne Chemical compound CC(C)(C)OOC(C)(CC)C#CC(C)(CC)OOC(C)(C)C SUDLAWBKAUEPOD-UHFFFAOYSA-N 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical group C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- VQUMKJYNMXNQPR-UHFFFAOYSA-N CCC#CCC.C(C1=CC=CC=C1)(=O)OO Chemical compound CCC#CCC.C(C1=CC=CC=C1)(=O)OO VQUMKJYNMXNQPR-UHFFFAOYSA-N 0.000 claims description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 2
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 2
- PDAVOLCVHOKLEO-UHFFFAOYSA-N acetyl benzenecarboperoxoate Chemical compound CC(=O)OOC(=O)C1=CC=CC=C1 PDAVOLCVHOKLEO-UHFFFAOYSA-N 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 2
- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 2
- 229920001038 ethylene copolymer Polymers 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229920001519 homopolymer Polymers 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229920003986 novolac Polymers 0.000 claims description 2
- AFEQENGXSMURHA-UHFFFAOYSA-N oxiran-2-ylmethanamine Chemical compound NCC1CO1 AFEQENGXSMURHA-UHFFFAOYSA-N 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 2
- 125000005396 acrylic acid ester group Chemical group 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 21
- 238000000576 coating method Methods 0.000 abstract description 21
- 238000012545 processing Methods 0.000 abstract description 10
- 239000003245 coal Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 18
- 239000010410 layer Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000945 filler Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 229920013716 polyethylene resin Polymers 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000012767 functional filler Substances 0.000 description 3
- 229920000092 linear low density polyethylene Polymers 0.000 description 3
- 239000004707 linear low-density polyethylene Substances 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 239000010117 shenhua Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 239000004840 adhesive resin Substances 0.000 description 2
- 229920006223 adhesive resin Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012757 flame retardant agent Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 229920001112 grafted polyolefin Polymers 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/02—Elements
- C08K2003/026—Phosphorus
-
- 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
- C08K2201/017—Additives being an antistatic agent
-
- 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
- C08L2201/04—Antistatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of coating type cross-linked polyethylene for underground coal mines, and particularly relates to a coating type cross-linked polyethylene composition, a cross-linked polyethylene blend and a composite material product, wherein the composition comprises the following components: (a) 100 parts by weight of a base resin comprising a polyethylene base resin, (b) 2 to 8 parts by weight of a polar molecule, (c) 0.1 to 0.8 parts by weight of a peroxide crosslinking agent, (d) 2 to 9 parts by weight of an antistatic agent, and (e) 5 to 12 parts by weight of a flame retardant. The product of the invention can obtain equivalent flame retardant antistatic property and simultaneously maintain higher stress cracking resistance (ESCR), and can also improve the processing leveling property and reduce the cost.
Description
Technical Field
The invention belongs to the technical field of coating type cross-linked polyethylene for underground coal mines, and particularly relates to a coating type cross-linked polyethylene composition, a cross-linked polyethylene blend and a composite material product.
Background
At present, most of the industry realizes flame retardance and antistatic property of mine pipelines by reinforcing double-resistant plastic pipelines or multi-layer composite pipelines, and potential safety hazards exist due to the non-flame retardance of inner plastic or adhesive of the pipelines. The prior art proposes improvements such as:
patent document CN108752695a discloses a preparation method of flame-retardant antistatic polyethylene resin, the formula comprises 70-80 parts of polyethylene, 5-25 parts of conductive material, 3-5 parts of colorant, 3-10 parts of flame retardant and 0.1-1 part of antistatic agent; the polyethylene resin meets the flame-retardant antistatic requirement, but the obtained resin has no metal cohesiveness and cannot be directly coated on the metal surface, and when the polyethylene resin is used as a pipeline, hot melt adhesive is additionally added for lining plastic, so that the processing cost is increased.
The patent document CN109897569A discloses a conductive adhesive resin of a steel wire pipe for a coal mine, a preparation method thereof and the steel wire pipe. However, the polyethylene has no flame retardant property and cannot realize flame retardant effect by being singly used, and therefore, the polyethylene is used as adhesive resin and can achieve flame retardant effect by being adhered to a steel wire pipe, and the polyethylene does not belong to a real flame retardant polymer material, so that the application field of the polyethylene is limited.
The patent document CN200720029018.X discloses a large-caliber gas pipe for underground coal mine, which is a multi-layer steel-plastic composite pipe formed by an inner layer flame-retardant antistatic layer (1), an inner layer pipe body (2) outside the inner layer flame-retardant antistatic layer (1) and an inner layer reinforcing layer (3) inside the inner layer pipe body (2), wherein the composite pipe is used as a whole to achieve high strength and simultaneously realize flame-retardant antistatic performance on the outer layer. However, the composite pipeline is complex to process, and the inner plastic and the hot melt adhesive have no flame retardant and antistatic properties.
According to the requirements of line standard MT113, the pipeline coating used underground in the coal mine must meet the requirements of flame retardance and static electricity resistance. The method requires adding a large amount of flame retardant and antistatic agent into the coating composition, and the addition of a large amount of filler has an influence on the mechanical property and bonding strength of the coating material, so that how to obtain the coating material meeting the flame retardant and antistatic requirements of mines and having good use and processing performance is important in research.
Disclosure of Invention
The invention aims to solve the problem of improving flame-retardant antistatic property of the existing underground coal mine coated polyethylene material, and provides a coated crosslinked polyethylene composition, a crosslinkable polyethylene blend and a composite material product, which can obtain equivalent flame-retardant antistatic property, maintain high stress cracking resistance (ESCR) performance, improve processing leveling property and reduce cost.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
in one aspect, there is provided a coated crosslinked polyethylene composition comprising the following components:
(a) 100 parts by weight of a base resin comprising a polyethylene matrix resin,
(b) 2 to 8 parts by weight of polar molecules, for example, 2.5 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight,
(c) 0.1 to 0.8 parts by weight of a peroxide crosslinking agent, for example, 0.2 parts by weight, 0.4 parts by weight, 0.6 parts by weight, 0.7 parts by weight,
(d) 2 to 9 parts by weight of an antistatic agent, for example, 3 parts by weight, 4 parts by weight, 6 parts by weight, 8 parts by weight,
(e) 5-12 parts by weight of a flame retardant, for example, 6 parts by weight, 8 parts by weight, 10 parts by weight, 11 parts by weight;
wherein the polar molecule is selected from one or more of epoxy resin, polyester resin, isocyanate oligomer, acrylate and acrylate oligomer.
In some embodiments of the invention, the base resin is a polyethylene matrix resin.
In some embodiments of the invention, the coating-type crosslinked polyethylene composition does not contain a polar group grafted polyolefin polymer.
According to the present invention there is provided a coated crosslinked polyethylene composition, in some embodiments, the polyethylene matrix resin is selected from ethylene homopolymers and/or ethylene copolymers, preferably selected from low density polyethylene, high density polyethylene, ethylene propylene rubber, ethylene propylene diene monomer, ethylene and C 4-8 At least one of the olefin copolymers.
In some embodiments, the polyethylene matrix resin has a density of 0.85 to 0.965g/cm 3 (e.g., 0.9 g/cm) 3 、0.91g/cm 3 、0.95g/cm 3 ) Preferably 0.92-0.965g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The polyethylene matrix resin has a melt index of 0.01-50g/10min (e.g., 0.1g/10min, 1g/10min, 5g/10min, 10g/10min, 20g/10min, 40g/10 min), preferably 2-30g/10min, at 190℃and a load of 2.16 kg.
The polyethylene resin used is commercially available, for example HDPE 8920 (melt index 20g/10min, density 0.960g/cm, available from Dushan Corp 3 ) LLDPE 7042 (melt index of 2g/10min, density of 0.924 g/cm) from Shenhua 3 ). The polyethylene matrix resin according to the invention may be a mixture of low density polyethylene and high density polyethylene, wherein the weight ratio of low density polyethylene to high density polyethylene is for example 1-10:1.
According to the coated crosslinked polyethylene composition provided by the invention, for example, the peroxide crosslinking agent is at least one selected from the group consisting of alkyl peroxides, aryl peroxides, acyl peroxides and ketone peroxides.
In some embodiments of the present invention, the peroxide crosslinking agent is selected from dibenzoyl peroxide, acetylbenzoyl peroxide, dicumyl peroxide, di-tert-butyldicumyl peroxide, 2, 5-dimethyl-2, 5-di-tert-butylperoxy-3-hexyne, 2, 5-dimethyl-2, 5-benzoyl peroxyhexane, 2, 5-dimethyl-2, 5-di-tert-butylperoxyhexane, 2, 5-dimethyl-2, 5-dihydro peroxyhexane, 1-di (tert-butylperoxy) -3, 5-trimethylcyclohexane, 2, 7-dimethyl-2, 7-di (peroxyethyl carbonate) -3, 5-octanedioyne 3, 6-dimethyl-3, 6-bis (peroxyethyl carbonate) -4-octyne, 3, 6-dimethyl-3, 6-bis (t-butylperoxy) -4-octyne, 2, 5-dimethyl-2, 5-bis (peroxybenzoate) -3-hexyne, 2, 5-dimethyl-2, 5-bis (peroxyn-propyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-bis (peroxyisobutyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-bis (peroxyethyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-bis (alpha-cumyl peroxy) -3-hexyne, 2, 5-dimethyl-2, 5-bis (peroxybeta-chloroethyl carbonate) -3-hexyne, at least one of di-2, 4-dichlorobenzoyl peroxide, di-4-methylbenzoyl peroxide, di-tert-butylperoxyisopropyl benzene, di-tert-butyl peroxide, tert-butylcumyl peroxide, tert-butylperoxy-3, 5-trimethylhexanoate and tert-butylperoxybenzoate.
According to some embodiments of the coated crosslinked polyethylene composition provided herein, the epoxy resin is selected from one or more of bisphenol a type epoxy resin, novolac type epoxy resin, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, aliphatic type epoxy resin, vinyl type epoxy resin, and silicone type epoxy resin; the epoxy resin has an epoxy value greater than 0.1.
The epoxy resin is solid or liquid with viscosity less than 2000 Pa.s. The epoxy resin does not contain various types of curing agents. Commercially available are, for example, epoxy resins E20, solids with an epoxy value of 0.18 to 0.23. The vinyl-based epoxy resin may be a commercially available vinyl resin 901.
In some embodiments, the polyester resin is selected from saturated polyester resins and/or unsaturated polyester resins; the weight average molecular weight of the polyester resin is less than 5000, e.g., 500, 1000, 1500, 3000, 4000.
In some embodiments, the isocyanate is selected from one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate.
In some embodiments, the isocyanate oligomer is selected from oligomers derived from self-polymerizing or copolymerizing one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate; the isocyanate oligomer has a weight average molecular weight of less than 2000, e.g., 50, 100, 500, 1000, 1500, 1800.
In some embodiments, the acrylate is selected from one or more of methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate, n-butyl methacrylate.
In some embodiments, the acrylate oligomer is selected from oligomers derived from self-polymerization or copolymerization of one or more of methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate, n-butyl methacrylate; the acrylate oligomer has a weight average molecular weight of less than 2000, e.g., 50, 100, 500, 1000, 1500, 1800.
According to the coated crosslinked polyethylene composition provided by the invention, in some embodiments, the antistatic agent is selected from one or more of conductive carbon black, graphite, carbon nanotubes and graphene.
According to the coated crosslinked polyethylene composition provided by the invention, in some embodiments, the flame retardant is a phosphorus flame retardant, preferably one or more selected from red phosphorus, coated red phosphorus and microencapsulated red phosphorus.
In the present invention, the components in the formulation of the coated crosslinked polyethylene composition may be extruded through a twin screw extruder at, for example, 140℃and 120rpm to prepare a crosslinked polyethylene blend of high cohesiveness. The processing morphology of the blend can take a variety of forms.
For example, the high adhesion crosslinked polyethylene blend extruded from an extruder may be ground into a powder or extruded/cast into a film, which may then be roll coated/sprayed or coated onto a metal substrate surface, and heated for a period of time at 180-230 ℃ and cooled to provide the final composite article. The metal base material or the metal component can be carbon steel, stainless steel, aluminum, zinc and the like.
In another aspect, the present invention also provides a crosslinkable polyethylene blend, which is the product of melt blending a polyethylene composition as described above at 130-160 ℃, followed by pelletization, extrusion or casting.
In yet another aspect, the present invention also provides a composite article comprising a metal part and a crosslinked polyethylene layer attached to a surface of the metal part; the crosslinked polyethylene layer is obtained by coating the crosslinkable polyethylene blend as described above on the surface of the metal part and crosslinking by heating.
According to the composite article provided herein, in some embodiments, the temperature of the thermal crosslinking is 180-230 ℃ (e.g., 200 ℃, 210 ℃, 220 ℃).
In the present invention, the components of the polyethylene composition are melt extrusion blended, so that crosslinking and adhesion do not occur during the production of the blend, and the coating type material is easy to produce. Meanwhile, the crosslinking and metal bonding function occurs in the processing process of the composite material product, and the method has the advantages of wide processing window and large bonding force, and is easy for forming the composite product.
In order to realize flame-retardant and antistatic properties, the mining double-resistant polyolefin material prepared in the current industry often needs to be added with a large amount of functional filler (generally 15-20 parts by weight based on 100 parts by weight of the matrix), and also needs to be added with a polar group grafted polymer as a compatilizer in order to maintain the compatibility of the filler and the resin matrix. According to the polyethylene composition, the polar groups are introduced by adding the polar molecules, and the polar groups are grafted with the polyolefin matrix resin in situ on the surface of the flame-retardant/conductive filler, so that the metal cohesiveness is improved under the condition that no additional compatilizer is added, the in-situ compatibility of the filler and the resin matrix is realized, the used functional filler is well dispersed in the matrix, enough flame-retardant antistatic performance can be obtained under the condition of less filler addition, the content of the required filler is greatly reduced, and meanwhile, the mining polyethylene anti-corrosion coating with the flame-retardant antistatic performance can be directly obtained.
Stress Crack Resistance (ESCR) is a significant property of coating materials that is of great interest in the industry, especially in pipe applications, directly affecting the life span of the material. In the modification process of endowing the material with flame-retardant/antistatic properties and the like, the ESCR time is often lower due to poor compatibility of the filler and a matrix after the flame-retardant antistatic filler is added. According to the technical scheme, the ESCR performance of the material can be obviously improved while the equivalent flame-retardant antistatic performance is obtained, and a good use effect is obtained.
The effect of leveling the surface of the cured coating material also directly affects the performance of the article. The coating with uniform, even and smooth surface thickness can provide better anti-corrosion effect on one hand, and on the other hand, the friction coefficient of the coating is low, so that the material is beneficial to conveying in products such as pipelines. According to the invention, by optimizing the time of crosslinking and curing and reasonably selecting the contents of each component (especially the contents of polar molecules and fillers), a good surface leveling effect can be obtained, and the technical problem that the coating surface leveling property is poor due to the fact that a large amount of high-viscosity components are required to be added in order to realize metal adhesion of the traditional coating material is solved.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention can provide excellent metal cohesiveness by adding proper content of in-situ grafted polar macromolecule into the polyethylene composition, and the polar macromolecule can avoid adding a large amount of polyolefin grafted by polar group serving as a compatilizer, thereby improving processing leveling property and reducing cost. The polar groups in the polar macromolecules are grafted with the polyolefin matrix in situ on the surface of the flame-retardant/antistatic filler, so that the compatibility and dispersibility of the filler and the resin matrix are greatly improved, the polar molecules and the dosage thereof are selected to play a synergistic effect with the dosage of other components, the amount of the filler required for obtaining enough flame-retardant antistatic performance is greatly reduced, and the equivalent flame-retardant antistatic performance is obtained while the higher stress cracking resistance (ESCR) performance is maintained.
Detailed Description
So that the technical features and content of the present invention can be understood in detail, preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention have been described in the examples, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
The test methods referred to in the following examples and comparative examples are as follows:
(1) Notched impact Strength
Taking weighed composition granules to be tested, tabletting and preparing samples by using a 100mm multiplied by 120mm multiplied by 4mm die, intercepting 10mm multiplied by 80mm multiplied by 4mm samples, punching a V-shaped notch with the depth of 2mm in the middle of the samples, and then placing the samples in a test room for 24 hours, and then testing the samples by using a CEAST impact tester according to the GB1843-2008 method.
(2) Bond strength
The bond strength was measured according to GBT5210 as follows: the testing spindle (diameter 5 cm) is adhered to the testing surface by using high-strength adhesive, the coating around the spindle is scraped by using a special drawing tool until the coating is deep to the steel plate, a tensile stress is applied to the steel plate in the vertical direction by using a pulling machine, the stress is steadily increased at the speed of 0.1MPa/s until the testing spindle is separated from the tested surface, and the reading of the pulling machine is the adhesive strength.
(3) Flame retardant Properties
The weighed pellets of the composition to be tested were tabletted with a 130mm by 13mm by 3.2mm die and tested according to ASTM D3801-2010. The test classifies the combustion grade according to the continuous combustion time, afterglow time, whether molten drops exist, whether the molten drops ignite absorbent cotton and the like after the sample is ignited. The method is specifically divided into four classes of V-0, V-1 and V-2, and No grade (NR: no Rating).
(4) Surface resistivity
According to GB/T1410-2006 test, 5 spots are tested per sample, 3 times in parallel, and an average is taken.
(5) Stress crack resistant ESCR
The sample piece thickness was 2mm, the notch depth was 0.3mm, and the time (h) elapsed when half of the sample piece was broken was taken as a test value, as measured according to the method prescribed in GB/T1842-2008.
(6) Leveling of surface
And (3) coating the surface of the steel plate by adopting a visual inspection method according to an implementation method, and observing the surface morphology of the coating layer after curing and crosslinking.
Examples
< source of raw materials >
HDPE 8920 (melt index 20g/10min, density 0.960 g/cm) 3 ) Is provided by the middle petrochemical Dushan company;
LLDPE 7042 (melt index of 2g/10min, density of 0.924 g/cm) 3 ) The Shenhua company provides;
crosslinking agent, dicumyl peroxide, 2, 5-dimethyl-2, 5-di-tert-butyl peroxy-3-hexyne;
polar molecules:
epoxy E20, purchased from a tin-free resin plant;
vinyl 901, available from Hemsleyak polymers Inc.;
diphenylmethane diisocyanate MDI available from new classical chemical materials (Shanghai);
antistatic agent, conductive carbon black and graphene, brand F900;
flame retardant, red phosphorus.
The polyethylene compositions of examples 1-6 were prepared by mixing the components through a mixing apparatus according to the formulations shown in Table 1. The polyethylene composition obtained was then extruded through a twin-screw extruder at 140℃and 120rpm, the blend was obtained, cut and granulated, and ground into powder by a plastic mill.
The components and their contents in the polyethylene composition are shown in Table 1.
TABLE 1
The powder of the resulting crosslinked polyethylene blend was coated on a steel sheet and cured by heating at 210℃to obtain a steel sheet coated composite article, which was then tested by the test method described above, and the results are shown in Table 2.
Table 2 properties of composite articles
Comparative example
< source of raw materials >
HDPE 8920 (melt index 20g/10min, density 0.960 g/cm) 3 ) Is provided by the middle petrochemical Dushan company;
LLDPE 7042 (melt index of 2g/10min, density of 0.924 g/cm) 3 ) The Shenhua company provides;
polar molecules, epoxy E20, purchased from tin-free resin factories;
a crosslinking agent, dicumyl peroxide;
antistatic agent, conductive carbon black, brand F900;
flame retardant, red phosphorus.
The polyethylene compositions of comparative examples 1-2 were prepared by mixing the components through a mixing apparatus according to the formulations shown in Table 3. The resulting polyethylene composition was extruded through a twin screw extruder at 140℃and 120rpm to give a blend which was then cut to pellets and ground into powder by a plastic mill.
The components of the composition and their contents are shown in Table 3.
TABLE 3 Table 3
| Component g | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| HDPE 8920 | 80 | 80 | 80 | 80 | 80 |
| LLDPE7042 | 20 | 20 | 20 | 20 | 20 |
| Dicumyl peroxide | 0.4 | - | 0.02 | 1 | 0.4 |
| Epoxy resin E20 | - | 3 | 5 | 3 | 10 |
| Conductive carbon black | 3 | 3 | 3 | 5 | 3 |
| Red phosphorus | 6 | 6 | 6 | 8 | 6 |
The powder of the resulting crosslinked polyethylene blend was coated on a steel sheet and cured by heating at 210℃to obtain a steel sheet coated composite article, which was then tested by the test method described above, and the results are shown in Table 4.
Table 4 properties of composite articles
As can be seen from the results of tables 1-4, the polyethylene composition provided by the invention has a small amount of functional filler, and the obtained polyethylene coating material has enough flame retardant antistatic property, maintains higher stress cracking resistance (ESCR), and also has improved processing leveling property and reduced cost.
Comparing the examples with the comparative examples, the composition provided by the invention is adopted to prepare the polyethylene coating material under the condition of equal filler dosage, so that the sufficient flame retardant and antistatic performance is obtained, and meanwhile, the high stress cracking resistance (ESCR) performance is maintained, and the processing leveling property is improved; the compositions of comparative examples 1-2 did not provide the good flame retardant and antistatic properties, nor did they provide the stress crack resistance (ESCR), bond strength and impact strength. The composition of comparative example 3 has a low amount of crosslinking agent, and the obtained material has poor flame retardant and antistatic properties and poor ESCR properties. The compositions of comparative examples 4 and 5 used high levels of crosslinking agent and polar molecules, and the resulting materials had poor ESCR properties and poor leveling.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the spirit of the invention.
Claims (10)
1. A coated crosslinked polyethylene composition comprising the following components:
(a) 100 parts by weight of a base resin comprising a polyethylene matrix resin,
(b) 2 to 8 parts by weight of a polar molecule,
(c) 0.1 to 0.8 part by weight of a peroxide crosslinking agent,
(d) 2 to 9 parts by weight of an antistatic agent,
(e) 5-12 parts by weight of a flame retardant;
wherein the polar molecule is selected from one or more of epoxy resin, polyester resin, isocyanate oligomer, acrylate and acrylate oligomer.
2. The coated crosslinked polyethylene composition according to claim 1, wherein the polyethylene matrix resin is selected from ethylene homopolymers and/or ethylene copolymers, preferably from low density polyethylene, high density polyethylene, ethylene propylene rubber, ethylene propylene diene monomer, ethylene and C 4-8 At least one of the olefin copolymers.
3. The coated crosslinked polyethylene composition according to claim 1, wherein the polyethylene matrix resin has a density of 0.85-0.965g/cm 3 Preferably 0.92-0.965g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The polyethylene matrix resin has a melt index of 0.01-50g/10min, preferably 2-30g/10min, at 190 ℃ under a load of 2.16 kg.
4. The coated crosslinked polyethylene composition according to claim 1, wherein,
the peroxide crosslinking agent is selected from dibenzoyl peroxide, acetylbenzoyl peroxide, dicumyl peroxide, di-tert-butyldicumyl peroxide, 2, 5-dimethyl-2, 5-di-tert-butylperoxy-3-hexyne, 2, 5-dimethyl-2, 5-benzoyl-peroxyhexane, 2, 5-dimethyl-2, 5-di-tert-butylperoxy-hexane, 2, 5-dimethyl-2, 5-dihydro-peroxyhexane, 1-di (tert-butylperoxy) -3, 5-trimethylcyclohexane, 2, 7-dimethyl-2, 7-bis (peroxyethyl carbonate) -3, 5-octanedione, 3, 6-dimethyl-3, 6-bis (peroxyethyl carbonate) -4-octane 3, 6-dimethyl-3, 6-di (tert-butylperoxy) -4-octyne, 2, 5-dimethyl-2, 5-di (peroxybenzoate) -3-hexyne, 2, 5-dimethyl-2, 5-di (peroxy-n-propyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-di (peroxy isobutyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-di (peroxyethyl carbonate) -3-hexyne, 2, 5-dimethyl-2, 5-di (alpha-cumyl peroxy) -3-hexyne, 2, 5-dimethyl-2, 5-di (peroxy beta-chloroethyl carbonate) -3-hexyne, di-2, 4-dichlorobenzoyl peroxide, at least one of di-4-methylbenzoyl peroxide, di-tert-butylperoxyisopropyl benzene, di-tert-butyl peroxide, tert-butylcumyl peroxide, tert-butylperoxy-3, 5-trimethylhexanoate and tert-butylperoxybenzoate.
5. The coated crosslinked polyethylene composition according to claim 1, wherein the epoxy resin is selected from one or more of bisphenol a type epoxy resin, novolac type epoxy resin, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, aliphatic type epoxy resin, vinyl type epoxy resin, silicone type epoxy resin; the epoxy value of the epoxy resin is greater than 0.1; and/or
The polyester resin is selected from saturated polyester resin and/or unsaturated polyester resin; the weight average molecular weight of the polyester resin is less than 5000; and/or
The isocyanate is selected from one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate; and/or
The isocyanate oligomer is selected from oligomer obtained by self-polymerizing or copolymerizing one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate; the isocyanate oligomer has a weight average molecular weight of less than 2000; and/or
The acrylic ester is one or more selected from methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate and n-butyl methacrylate; and/or
The acrylic acid ester oligomer is selected from oligomer obtained by self-polymerizing or copolymerizing one or more of methyl acrylate, ethyl acrylate, n-butyl acrylate, methyl methacrylate and n-butyl methacrylate; the acrylate oligomer has a weight average molecular weight of less than 2000.
6. The coated crosslinked polyethylene composition according to claim 1, wherein the antistatic agent is selected from one or more of conductive carbon black, graphite, carbon nanotubes, graphene.
7. The coated crosslinked polyethylene composition according to claim 1, wherein the flame retardant is a phosphorus flame retardant, preferably one or more selected from red phosphorus, coated red phosphorus, microencapsulated red phosphorus.
8. A crosslinkable polyethylene blend, characterized in that it is obtained by melt blending a composition according to any one of claims 1-7 at 130-160 ℃, followed by pelletization, extrusion or casting.
9. A composite article comprising a metal part and a crosslinked polyethylene layer attached to a surface of the metal part; the crosslinked polyethylene layer is obtained by applying the crosslinkable polyethylene blend according to claim 8 to the surface of the metal part and crosslinking by heating.
10. The composite article of claim 9 wherein the temperature of the thermal crosslinking is 180-230 ℃.
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