WO2020171623A1 - 고내압성을 갖는 폴리에틸렌 및 이를 포함하는 가교 폴리에틸렌 파이프 - Google Patents
고내압성을 갖는 폴리에틸렌 및 이를 포함하는 가교 폴리에틸렌 파이프 Download PDFInfo
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- WO2020171623A1 WO2020171623A1 PCT/KR2020/002467 KR2020002467W WO2020171623A1 WO 2020171623 A1 WO2020171623 A1 WO 2020171623A1 KR 2020002467 W KR2020002467 W KR 2020002467W WO 2020171623 A1 WO2020171623 A1 WO 2020171623A1
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- polyethylene
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- -1 Polyethylene Polymers 0.000 title claims abstract description 124
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 78
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 78
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 39
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 39
- 238000004132 cross linking Methods 0.000 claims abstract description 26
- 150000001875 compounds Chemical class 0.000 claims description 61
- 239000001257 hydrogen Substances 0.000 claims description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims description 31
- 229910052736 halogen Inorganic materials 0.000 claims description 17
- 150000002367 halogens Chemical class 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 13
- 239000012968 metallocene catalyst Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 13
- 239000003431 cross linking reagent Substances 0.000 claims description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005977 Ethylene Substances 0.000 claims description 11
- 150000002431 hydrogen Chemical class 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 9
- 239000004717 peroxide crosslinked polyethylene Substances 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 7
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 6
- 229910052723 transition metal Inorganic materials 0.000 claims description 6
- 150000003624 transition metals Chemical class 0.000 claims description 6
- 230000000379 polymerizing effect Effects 0.000 claims description 5
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Natural products C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 claims description 4
- JJRDRFZYKKFYMO-UHFFFAOYSA-N 2-methyl-2-(2-methylbutan-2-ylperoxy)butane Chemical compound CCC(C)(C)OOC(C)(C)CC JJRDRFZYKKFYMO-UHFFFAOYSA-N 0.000 claims description 4
- 150000001923 cyclic compounds Chemical class 0.000 claims description 4
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 claims description 4
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 claims description 4
- 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 3
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Chemical group 0.000 claims description 3
- HQLWSPAOVXYSSG-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C.CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C HQLWSPAOVXYSSG-UHFFFAOYSA-N 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910052732 germanium Chemical group 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical group [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 42
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 42
- 239000000243 solution Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 19
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 238000005227 gel permeation chromatography Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 11
- LWNGJAHMBMVCJR-UHFFFAOYSA-N (2,3,4,5,6-pentafluorophenoxy)boronic acid Chemical compound OB(O)OC1=C(F)C(F)=C(F)C(F)=C1F LWNGJAHMBMVCJR-UHFFFAOYSA-N 0.000 description 10
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 9
- 229920001903 high density polyethylene Polymers 0.000 description 9
- 239000004700 high-density polyethylene Substances 0.000 description 9
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- 230000000694 effects Effects 0.000 description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- PBKONEOXTCPAFI-UHFFFAOYSA-N 1,2,4-trichlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1 PBKONEOXTCPAFI-UHFFFAOYSA-N 0.000 description 6
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- 238000005481 NMR spectroscopy Methods 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 6
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- 230000015572 biosynthetic process Effects 0.000 description 6
- 235000011089 carbon dioxide Nutrition 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
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- 230000014509 gene expression Effects 0.000 description 5
- RXXXUIOZOITBII-UHFFFAOYSA-N indeno[1,2-g]indole Chemical class C1=C2C=CC=CC2=C2C1=C1N=CC=C1C=C2 RXXXUIOZOITBII-UHFFFAOYSA-N 0.000 description 5
- 239000003446 ligand Substances 0.000 description 5
- DLEDOFVPSDKWEF-UHFFFAOYSA-N lithium butane Chemical compound [Li+].CCC[CH2-] DLEDOFVPSDKWEF-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 4
- 125000003545 alkoxy group Chemical group 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 125000001188 haloalkyl group Chemical group 0.000 description 4
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 4
- MZRVEZGGRBJDDB-UHFFFAOYSA-N n-Butyllithium Substances [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 4
- 150000001451 organic peroxides Chemical class 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 125000003709 fluoroalkyl group Chemical group 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 description 3
- 239000004719 irradiation crosslinked polyethylene Substances 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
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- 229920013716 polyethylene resin Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
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- 125000001424 substituent group Chemical group 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- RURFJXKOXIWFJX-UHFFFAOYSA-N (2,3,4,6-tetrafluorophenoxy)boronic acid Chemical compound OB(O)OC1=C(F)C=C(F)C(F)=C1F RURFJXKOXIWFJX-UHFFFAOYSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
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- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 2
- DCTOHCCUXLBQMS-UHFFFAOYSA-N 1-undecene Chemical compound CCCCCCCCCC=C DCTOHCCUXLBQMS-UHFFFAOYSA-N 0.000 description 2
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- KPBQMFGOMZHQMN-UHFFFAOYSA-N 8-methyl-5-[[2-(trifluoromethyl)phenyl]methyl]-10H-indeno[1,2-b]indole Chemical compound CC1=CC=2C3=C(N(C=2C=C1)CC1=C(C=CC=C1)C(F)(F)F)C1=CC=CC=C1C3 KPBQMFGOMZHQMN-UHFFFAOYSA-N 0.000 description 2
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- 0 Cc1c(*)c(*)c(*)c(C[n](c-2c3Cc4c(*)c(*)c(*)c(*)c-24)c2c3c(*)c(*)c(*)c2*)c1* Chemical compound Cc1c(*)c(*)c(*)c(C[n](c-2c3Cc4c(*)c(*)c(*)c(*)c-24)c2c3c(*)c(*)c(*)c2*)c1* 0.000 description 2
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- 238000011088 calibration curve Methods 0.000 description 2
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- 238000010894 electron beam technology Methods 0.000 description 2
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- 125000005842 heteroatom Chemical group 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
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- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
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- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- 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 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000005160 aryl oxy alkyl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 229910052796 boron Inorganic materials 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
- 125000004369 butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001793 charged compounds Polymers 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 125000002933 cyclohexyloxy group Chemical group C1(CCCCC1)O* 0.000 description 1
- HKUFIYBZNQSHQS-UHFFFAOYSA-O dioctadecylazanium Chemical compound CCCCCCCCCCCCCCCCCC[NH2+]CCCCCCCCCCCCCCCCCC HKUFIYBZNQSHQS-UHFFFAOYSA-O 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000005745 ethoxymethyl group Chemical group [H]C([H])([H])C([H])([H])OC([H])([H])* 0.000 description 1
- MGDOJPNDRJNJBK-UHFFFAOYSA-N ethylaluminum Chemical compound [Al].C[CH2] MGDOJPNDRJNJBK-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910021482 group 13 metal Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 150000007527 lewis bases Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- OXQMIXBVXHWDPX-UHFFFAOYSA-N n,n,2-trimethylpropan-2-amine Chemical compound CN(C)C(C)(C)C OXQMIXBVXHWDPX-UHFFFAOYSA-N 0.000 description 1
- SRLHDBRENZFCIN-UHFFFAOYSA-N n,n-di(butan-2-yl)butan-2-amine Chemical compound CCC(C)N(C(C)CC)C(C)CC SRLHDBRENZFCIN-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- VFLWKHBYVIUAMP-UHFFFAOYSA-N n-methyl-n-octadecyloctadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCN(C)CCCCCCCCCCCCCCCCCC VFLWKHBYVIUAMP-UHFFFAOYSA-N 0.000 description 1
- KUFYUMSBZMUWAN-UHFFFAOYSA-N n-methyl-n-tetradecyltetradecan-1-amine Chemical compound CCCCCCCCCCCCCCN(C)CCCCCCCCCCCCCC KUFYUMSBZMUWAN-UHFFFAOYSA-N 0.000 description 1
- HSUGDXPUFCVGES-UHFFFAOYSA-N n-tetradecyltetradecan-1-amine Chemical compound CCCCCCCCCCCCCCNCCCCCCCCCCCCCC HSUGDXPUFCVGES-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000000538 pentafluorophenyl group Chemical group FC1=C(F)C(F)=C(*)C(F)=C1F 0.000 description 1
- JQQSUOJIMKJQHS-UHFFFAOYSA-N pentaphenyl group Chemical group C1=CC=CC2=CC3=CC=C4C=C5C=CC=CC5=CC4=C3C=C12 JQQSUOJIMKJQHS-UHFFFAOYSA-N 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000001792 phenanthrenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C=CC12)* 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-N phosphine group Chemical group P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-O phosphonium Chemical compound [PH4+] XYFCBTPGUUZFHI-UHFFFAOYSA-O 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000001412 tetrahydropyranyl group Chemical group 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F10/02—Ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/64—Titanium, zirconium, hafnium or compounds thereof
- C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
- C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
Definitions
- the present invention relates to polyethylene having high pressure resistance and a crosslinked polyethylene pipe comprising the same.
- Crosslinked polyethylene was developed in 1960 by electric wire companies to improve the temperature characteristics of electric wires, and Thomas Engel of Germany used it in 1967 to manufacture pipes with excellent durability.
- the crosslinked polyethylene is transformed into a three-dimensional networked polyethylene by crosslinking high density polyethylene (HDPE) having a linear molecular structure, and has excellent characteristics such as heat resistance, durability, chemical resistance, and flexibility.
- HDPE high density polyethylene
- such a method of crosslinking polyethylene includes a method of crosslinking with an organic peroxide (Peroxide Crosslinking), crosslinking with a silane compound (Silane Crosslinking), and a method of crosslinking with an electron beam (radiation crosslinking).
- Peroxide Crosslinking an organic peroxide
- Silane Crosslinking crosslinking with a silane compound
- radiation crosslinking a method of crosslinking with an electron beam
- PE-Xa polyethylene crosslinked with an organic peroxide
- PE-Xb polyethylene crosslinked with a silane compound
- PE-Xc polyethylene crosslinked by electron beam irradiation
- crosslinked polyethylene pipe especially PE-Xa pipe
- a mixture of a polyethylene resin, a crosslinking agent, an antioxidant, and the like is typically extruded with a RAM type extruder to produce a mixture.
- PE-Xa has superior properties than PE-Xb and PE-Xc, and has the advantage of being able to produce flexible pipe products.
- polyethylene having a high melt index is suitable. This is because the higher the melt index, the higher the chain mobility and the higher the density.
- polyethylene having a high melt index has a disadvantage in that the degree of crosslinking is inferior because a large amount of low molecular weight is generated.
- the present invention is to provide a crosslinked polyethylene pipe including polyethylene having a high melt index and density, improving pressure resistance, and exhibiting an excellent degree of crosslinking, and thus having excellent physical properties as a pipe.
- the density measured according to ASTM D792 is 0.940 g/cm 3 or more and 0.960 g/cm 3 or less;
- the number average molecular weight (Mn) is 20,000 g/mol or more and 70,000 g/mol or less;
- Molecular weight distribution (PDI, Mw/Mn) is 2.5 or more and 3.7 or less;
- MI 21.6 Melt index measured under a temperature of 190°C and a load of 21.6 kg according to ASTM D1238 is 1 g/10min or more and 20 g/10min or less;
- polyethylene that satisfies.
- a crosslinked polyethylene pipe including the polyethylene is provided.
- the polyethylene according to the present invention has a high density and exhibits a sufficient degree of crosslinking, thereby exhibiting excellent strength and pressure resistance.
- first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components.
- Polyethylene according to an embodiment of the present invention has a density measured according to ASTM D792 of 0.940 g/cm 3 or more and 0.960 g/cm 3 or less;
- the number average molecular weight (Mn) is 20,000 g/mol or more and 70,000 g/mol or less;
- Molecular weight distribution (PDI, Mw/Mn) is 2.5 or more and 3.7 or less;
- the melt index (MI 21.6 ) measured under a temperature of 190° C. and a load of 21.6 kg is 1 g/10min or more and 20 g/10min or less.
- Cross-linked polyethylene is made by cross-linking high-density polyethylene (HDPE) having a linear molecular structure and transformed into polyethylene having a three-dimensional network structure, and has excellent characteristics such as heat resistance, durability, chemical resistance, and flexibility.
- HDPE high-density polyethylene
- Pipes made of such cross-linked polyethylene are usually manufactured by mixing polyethylene with a cross-linking agent and an antioxidant and then extrusion molding with a RAM type extruder.
- PE-Xa pipes have an advantage of having superior physical properties than PE-Xb pipes or PE-Xc pipes and producing flexible pipe products.
- the density of polyethylene is required to be high in order to meet the pressure resistance.
- Polyethylene having a high melt index has a disadvantage that a large amount of low molecular weight is produced and the degree of crosslinking is low.
- the present invention is designed to further improve the pressure resistance of the PE-Xa pipe of the present invention.
- the melt index (MI) and density are increased at the same time as compared to the prior art, and while exhibiting improved pressure resistance, the degree of crosslinking does not drop by 70%.
- MI melt index
- the present invention was achieved by developing a polyethylene resin suitable for use as a PE-Xa pipe.
- the polyethylene according to an embodiment of the present invention may be a high density polyethylene (HDPE) having a density measured according to ASTM D792 of 0.940 g/cm 3 or more and 0.960 g/cm 3 or less.
- HDPE high density polyethylene
- the density of the polyethylene of the present invention is 0.940 g/cm 3 or more, or 0.945 g/cm 3 or more, or 0.949 g/cm 3 or more, or 0.950 g/cm 3 or more, while 0.960 g/cm 3 or less, or 0.958 g/cm 3 or less, or 0.956 g/cm 3 or less, or 0.955 g/cm 3 or less.
- the polyethylene of the present invention can satisfy excellent pressure resistance characteristics.
- polyethylene according to an embodiment of the present invention has a number average molecular weight (Mn) of 20,000 to 70,000 g/mol. More specifically, the number average molecular weight is 20,000 g/mol or more, or 25,000 g/mol or more, or 30,000 g/mol or more, or 33,000 g/mol or more, and 70,000 g/mol or less, or 65,000 g/mol or less , Or 60,000 g/mol or less, or 57,000 g/mol or less, or 55,000 g/mol or less.
- Mn number average molecular weight
- polyethylene according to an embodiment of the present invention has a weight average molecular weight (Mw) of 100,000 to 250,000 g/mol. More specifically, the weight average molecular weight is 100,000 g/mol or more, or 120,000 g/mol or more, or 125,000 g/mol or more, or 130,000 g/mol or more, and 250,000 g/mol or less, or 230,000 g/mol or less , Or 220,000 g/mol or less, or 210,000 g/mol or less, or 200,000 g/mol or less.
- Mw weight average molecular weight
- polyethylene according to an embodiment of the present invention has a molecular weight distribution (MWD, Mw/Mn) of 2.5 to 3.7. More specifically, the molecular weight distribution may be 2.5 or more, or 2.6 or more, or 2.7 or more, or 2.8 or more, and 3.7 or less, or 3.6 or less, or 3.5 or less, or 3.4 or less.
- Mw/Mn molecular weight distribution
- the polyethylene of the present invention Can meet the characteristics of an overpass
- the number average molecular weight (Mn), the weight average molecular weight (Mw), and the molecular weight distribution are respectively measured by the weight average molecular weight (Mw) and number average molecular weight (Mn) of polyethylene using gel permeation chromatography (GPC). Then, the ratio (Mw/Mn) of the weight average molecular weight to the number average molecular weight was calculated as a molecular weight distribution.
- polyethylene samples were evaluated using a Waters PL-GPC220 instrument using a Polymer Laboratories PLgel MIX-B 300 mm length column.
- the evaluation temperature was 160 °C
- 1,2,4-trichlorobenzene was used as a solvent, and the flow rate was measured at a rate of 1 mL/min.
- the sample was prepared at a concentration of 10 mg/10 mL, and then supplied in an amount of 200 ⁇ L.
- the values of Mw and Mn were measured using a calibration curve formed using polystyrene standards.
- the molecular weight of the polystyrene standard was 2,000 / 10,000 / 30,000 / 70,000 / 200,000 / 700,000 / 2,000,000 / 4,000,000 / 10,000,000.
- polyethylene according to an embodiment of the present invention has a melt index (MI 21.6 ) of 1 to 20 g/10min measured under a temperature of 190° C. and a load of 21.6 kg according to ASTM D1238 standard. More specifically, the melt index (MI 21.6 ) is 3 g/10min or more, or 4 g/10min or more, or 5 g/10min or more, or 6 g/10min or more, while 18 g/10min or less, or 16 g/ It may be 10 min or less, or 15 g/10 min or less, or 14 g/10 min or less.
- MI 21.6 melt index
- the polyethylene of the present invention may satisfy excellent pressure resistance characteristics.
- the integral value of a region where the Log Mw value is 4.5 or less is 25% or less of the total integral value.
- the GPC curve graph means that the log functional molecular weight and mass fraction of polyethylene are measured by GPC and plotted on the x and y axes.
- Mw means a weight-average molecular weight.
- the integral value of the region where the Log Mw value is 4.5 or less is 23% or less, 22% or less, or 21% or less, 15% or more, or It may be 16% or more, or 17% or more, or 18% or more, and 25% or less, 24% or less, or 22% or less.
- the polyethylene of the present invention has an integral value of less than or equal to 4.5 of the log Mw value of 4.5 or less of 25% of the total integral value, and has a higher melt index than conventional products having a similar low molecular weight content, and thus has excellent crosslinking and pressure resistance.
- the characteristics of the overpass can be satisfied by the characteristics.
- polyethylene according to an embodiment of the present invention having the above-described physical properties can be prepared by a production method comprising polymerizing an ethylene monomer in the presence of a specific metallocene compound as a catalytic active component. .
- the ethylene of the present invention is not limited thereto, but the first metallocene compound represented by the following Formula 1; And a second metallocene compound represented by the following Formula 3, wherein the molar ratio of the first metallocene compound to the second metallocene compound is 1:5 to 1:20 in the presence of a hybrid metallocene catalyst , It can be prepared by polymerizing an ethylene monomer.
- Q 1 and Q 2 are the same as or different from each other, and each independently hydrogen, halogen, C1 to C20 alkyl group, C2 to C20 alkenyl group, C2 to C20 alkoxyalkyl group, C6 to C20 aryl group, C7 to C20 An alkylaryl group or a C7 to C20 arylalkyl group;
- B is carbon, silicon, or germanium
- M 1 is a Group 4 transition metal
- X 1 and X 2 are the same as or different from each other, and each independently halogen, C1 to C20 alkyl group, C2 to C10 alkenyl group, C6 to C20 aryl group, C7 to C20 alkylaryl group, or C7 to C20 Arylalkyl group;
- C 1 and One of C 2 is represented by the following formula 2a or 2b, and C 1 and The other of C 2 is represented by the following formula 2c;
- R 1 to R 21 and R 1 ′ to R 13 ′ are the same as or different from each other, and each independently hydrogen, halogen, a C1 to C20 alkyl group, a C1 to C20 haloalkyl group, a C2 to C20 alkenyl group, C1 to C20 Alkylsilyl group, C1 to C20 silylalkyl group, C1 to C20 alkoxysilyl group, C1 to C20 alkoxy group, C6 to C20 aryl group, C7 to C20 alkylaryl group, or C7 to C20 arylalkyl group
- at least one of R 9 to R 13 and R 9 ′ to R 13 ′ is a C1 to C20 haloalkyl group
- M 2 is a Group 4 transition metal
- Cp 1 and Cp 2 are the same as or different from each other, and each independently selected from the group consisting of cyclopentadienyl, indenyl, 4,5,6,7-tetrahydro-1-indenyl and fluorenyl Is a cyclic compound, and at least one hydrogen of the cyclic compound is each independently C1 to 20 alkyl, C1 to C20 alkoxy, C2 to C20 alkoxyalkyl, C6 to C20 aryl, C7 to C20 alkylaryl, or C7 to May be substituted with any one of C20 arylalkyl;
- X 3 And X 4 are the same as or different from each other, and each independently halogen, C1 to C20 alkyl, C2 to C10 alkenyl, C6 to C20 aryl, C7 to C20 alkylaryl, or C7 to C20 arylalkyl.
- the C1 to C20 alkyl group includes a linear or branched alkyl group, and specifically, a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group, Octyl group, and the like, but are not limited thereto.
- the C2 to C20 alkenyl group includes a linear or branched alkenyl group, and specifically allyl group, ethenyl group, propenyl group, butenyl group, pentenyl group, and the like, but are not limited thereto.
- the C6 to C20 aryl group includes a monocyclic or condensed aryl group, and specifically, a phenyl group, a biphenyl group, a naphthyl group, a phenanthrenyl group, a fluorenyl group, and the like, but are not limited thereto.
- Examples of the C1 to C20 alkoxy group include, but are not limited to, a methoxy group, an ethoxy group, a phenyloxy group, and a cyclohexyloxy group.
- the C2 to C20 alkoxyalkyl group is a functional group in which at least one hydrogen of the alkyl group as described above is substituted with an alkoxy group, and specifically, a methoxymethyl group, a methoxyethyl group, an ethoxymethyl group, iso-propoxymethyl group, iso-propoxy Alkoxyalkyl groups such as ethyl group, iso-propoxyhexyl group, tert-butoxymethyl group, tert-butoxyethyl group, and tert-butoxyhexyl group; Or an aryloxyalkyl group such as a phenoxyhexyl group, but is not limited thereto.
- the C1 to C20 alkylsilyl group or C1 to C20 alkoxysilyl group is a functional group in which 1 to 3 hydrogens of -SiH 3 are substituted with 1 to 3 alkyl or alkoxy groups as described above, and specifically methylsilyl group, di Alkylsilyl groups such as methylsilyl group, trimethylsilyl group, dimethylethylsilyl group, dimethylmethylsilyl group, or dimethylpropylsilyl group; Alkoxysilyl groups such as methoxysilyl group, dimethoxysilyl group, trimethoxysilyl group or dimethoxyethoxysilyl group; Alkoxyalkylsilyl groups such as a methoxydimethylsilyl group, a diethoxymethylsilyl group, or a dimethoxypropylsilyl group may be mentioned, but the present invention is not limited thereto.
- the C1 to C20 silylalkyl group is a functional group in which at least one hydrogen of the alkyl group as described above is substituted with a silyl group, and specifically, -CH 2 -SiH 3 , a methylsilylmethyl group, or a dimethylethoxysilylpropyl group may be mentioned. However, it is not limited to this.
- the halogen may be fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).
- substituents are optionally a hydroxy group within a range exhibiting the same or similar effect as the desired effect; halogen; An alkyl group or an alkenyl group, an aryl group, an alkoxy group; An alkyl or alkenyl group, an aryl group, or an alkoxy group including at least one hetero atom among the hetero atoms of Group 14 to Group 16; Silyl group; An alkylsilyl group or an alkoxysilyl group; Phosphine group; Phosphide group; Sulfonate group; And it may be substituted with one or more substituents selected from the group consisting of a sulfone group.
- Group 4 transition metal examples include titanium (Ti), zirconium (Zr), and hafnium (Hf), but are not limited thereto.
- R 1 to R 21 and R 1 ′ to R 13 ′ of Formulas 2a, 2b, and 2c are each independently hydrogen, halogen, a C1 to C20 alkyl group, or a C1 to C20 It may be a halo alkyl group, and at least one of R 9 to R 13 and R 9 ′ to R 13 ′ may be a C1 to C20 haloalkyl group.
- R 1 to R 21 and R 1 ′ to R 13 ′ are each independently hydrogen, methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, tert-butyl group, pentyl group, hexyl group, It is a heptyl group, an octyl group, or a fluoroalkyl group, and at least one of R 9 to R 13 and R 9 ′ to R 13 ′ may be fluoroalkyl, but is not limited thereto.
- Q 1 and Q 2 in Formula 1 may each independently be hydrogen, halogen, a C1 to C20 alkyl group, or a C2 to C20 alkoxyalkyl group.
- Q 1 and Q 2 are each independently hydrogen, methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, tert-butyl group, methoxymethyl group, tert-butoxymethyl group, tert-moiety It may be a oxyhexyl group, 1-ethoxyethyl group, 1-methyl-1-methoxyethyl group, tetrahydropyranyl group, or tetrahydrofuranyl group, but is not limited thereto.
- B in Formula 1 is preferably silicon, but is not limited thereto.
- X 1 and X 2 in Formula 1 may each independently be a halogen or a C1 to C20 alkyl group.
- the first metallocene compound of Formula 1 forms a structure in which an indeno indole derivative and a cyclopentadiene derivative are asymmetrically crosslinked by a bridge, and can act as a Lewis base in the ligand structure.
- an unshared electron pair By having an unshared electron pair, it is supported on a surface having Lewis acid properties of the carrier, and exhibits high polymerization activity even when supported.
- it contains electronically rich indeno indole and cyclopentadiene groups the activity is high, and excellent copolymerization and high activity are maintained due to the appropriate steric hindrance and the electronic effect of the ligand.
- R 9 to R 13 and R 9 ′ to R 13 ′ includes a C1 to C20 haloalkyl group.
- haloalkyl groups containing halogen elements other than other fluorine may also interact with beta-hydrogen, but hydrogen is highly electronegative atoms such as nitrogen, oxygen, and fluorine, and hydrogen bonds. bond). Not all haloalkyl groups form hydrogen bonds with beta-H. It does not form a hydrogen bond with beta-H including a haloalkyl group, but is an effect of introducing a fluorine substituent.
- a fluoroalkyl group that is, CF 3
- CF 3 which acts like a nitrogen atom of an indenoindole derivative and stabilizes the beta-hydrogen of the growing polymer chain by hydrogen bonds to further inhibit beta-hydrogen elimination.
- Ultra-high molecular weight polyolefin polymerization can be achieved more effectively. That is, the basic skeleton of the catalyst in which indeno indole derivatives and cyclopentadiene derivatives are asymmetrically crosslinked by a bridge is maintained, and a more powerful hydrogen bond acceptor, such as CF 3 , is introduced.
- CF 3 a more powerful hydrogen bond acceptor
- specific examples of the compound represented by Formula 2a may include a compound represented by the following structural formula, but the present invention is not limited thereto.
- specific examples of the compound represented by Formula 2b may include a compound represented by the following structural formula, but the present invention is not limited thereto.
- specific examples of the compound represented by Formula 2c may include a compound represented by one of the following structural formulas, but the present invention is not limited thereto.
- specific examples of the first metallocene compound represented by Formula 1 may include a compound represented by Formula 1-1, but are not limited thereto:
- the first metallocene compound may be synthesized by applying known reactions, and a more detailed synthesis method may refer to Examples.
- Cp 1 and Cp 2 in Formula 3 may each independently be cyclopentadienyl or indenyl, and at least one hydrogen of cyclopentadienyl or indenyl is each independently It may be substituted with any one of C1 to 20 alkyl or C2 to C20 alkoxyalkyl.
- M 2 in Formula 3 is preferably zirconium (Zr), but is not limited thereto.
- X 3 and X 4 in Formula 3 may each independently be a halogen or a C1 to C20 alkyl group.
- the second metallocene compound represented by Formula 3 may be, for example, a compound represented by one of the following structural formulas, but is not limited thereto.
- the second metallocene compound represented by Formula 3 may be more preferably represented by Formula 3-1:
- the second metallocene compound represented by Chemical Formula 3 may be synthesized by applying known reactions, and a more detailed synthesis method may be referred to in Examples.
- the first metallocene compound represented by Formula 1 mainly contributes to expressing high molecular weight polyethylene
- the second metallocene represented by Formula 3 The compounds can mainly contribute to expressing low molecular weight polyethylene with a narrow molecular weight distribution.
- the hybrid metallocene catalyst according to an embodiment of the present invention is used as a hybrid metallocene catalyst by using a metallocene compound having a low molecular weight expression with a narrow molecular weight distribution and a metallocene compound having a high molecular weight expression. , It is advantageous to polymerize the polyethylene of the present invention described above.
- the molar ratio of the first metallocene compound represented by Chemical Formula 1 to the second metallocene compound represented by Chemical Formula 3 is 1:5 to 1:20, or 1: It may be 7 to 1:18, or 1:8 to 1:15.
- the molar ratio of the first and second metallocene compounds exceeds 1:20 and the second metallocene compound is too large, the low molecular weight expression ratio becomes too large, so that the crosslinking property may deteriorate, and the molar ratio If the amount is less than 1:5, and too little of the second metallocene compound is included, the chain mobility decreases and the density of the polyethylene decreases, which may deteriorate the pressure resistance. Therefore, from this viewpoint, the molar ratio of the first and second metallocene compounds may preferably be in the above-described range.
- the hybrid metallocene catalyst used in the present invention includes at least one of the first metallocene compound represented by Chemical Formula 1 and at least one of the second metallocene compound represented by Chemical Formula 3 together with a cocatalyst compound. It may be carried on.
- a general metallocene As a cocatalyst supported together on a carrier to activate the first and second metallocene compounds, as an organometallic compound containing a group 13 metal, a general metallocene It is not particularly limited as long as it can be used when polymerizing olefins under a catalyst.
- the cocatalyst compound may include at least one of an aluminum-containing first cocatalyst of Formula 4 below and a borate-based second cocatalyst of Formula 5 below.
- R a is each independently halogen, halogen-substituted or unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, k is an integer of 2 or more,
- T + is a +1 valent polyatomic ion
- B is boron in a +3 oxidation state
- G is each independently hydride, dialkylamido, halide, alkoxide, aryloxide, hydrocarbyl, halocarbyl And halo-substituted hydrocarbyl, wherein G has 20 or less carbons, but at only one or less positions G is a halide.
- the polymerization activity can be further improved by the use of such first and second cocatalysts.
- the first cocatalyst of Formula 4 may be an alkylaluminoxane-based compound in which a repeating unit is bonded in a linear, circular, or networked form, and specific examples of such a first cocatalyst include methylaluminoxane (MAO), ethylaluminum Noxane, isobutyl aluminoxane, butyl aluminoxane, etc. are mentioned.
- MAO methylaluminoxane
- ethylaluminum Noxane ethylaluminum Noxane
- isobutyl aluminoxane isobutyl aluminoxane
- butyl aluminoxane etc.
- the second cocatalyst of Formula 5 may be a trisubstituted ammonium salt, a dialkyl ammonium salt, or a borate-based compound in the form of a trisubstituted phosphonium salt.
- Such a second cocatalyst include trimetalammonium tetraphenylborate, methyldioctadecylammonium tetraphenylborate, triethylammonium tetraphenylborate, tripropylammonium tetraphenylborate, tri(n-butyl)ammonium tetraphenylborate , Methyltetradecyclooctadecylammonium tetraphenylborate, N,N-dimethylaninium tetraphenylborate, N,N-diethylaninium tetraphenylborate, N,N-dimethyl (2,4,6-trimethylaninium )Tetraphenyl borate, trimethylammonium tetrakis (pentafluorophenyl) borate, methylditetradecylammonium tetrakis (pentafluor
- the mass ratio of the total transition metal contained in the first and second metallocene compounds to the carrier may be 1: 10 to 1: 1,000.
- the carrier and the metallocene compound are included in the mass ratio, the optimum shape may be exhibited.
- the mass ratio of the cocatalyst compound to the carrier may be 1:1 to 1:100.
- a carrier containing a hydroxy group on the surface may be used as the carrier, and preferably, a carrier having a highly reactive hydroxyl group and a siloxane group from which moisture is removed from the surface may be used as the carrier.
- Carriers can be used.
- silica dried at high temperature silica-alumina, and silica-magnesia may be used, and these are usually oxides, carbonates, such as Na 2 O, K 2 CO 3 , BaSO 4 , and Mg(NO 3 ) 2 , It may contain sulfate and nitrate components.
- the drying temperature of the carrier is preferably 200 to 800°C, more preferably 300 to 600°C, and most preferably 300 to 400°C.
- the drying temperature of the carrier is less than 200°C, there is too much moisture so that the moisture on the surface and the cocatalyst react, and when it exceeds 800°C, the pores on the surface of the carrier are combined and the surface area decreases, and there are many hydroxyl groups on the surface. It is not preferable because it disappears and only siloxane groups remain, and the reaction site with the cocatalyst decreases.
- the amount of hydroxy group on the surface of the carrier is preferably 0.1 to 10 mmol/g, and more preferably 0.5 to 5 mmol/g.
- the amount of hydroxy groups on the surface of the carrier can be controlled by a method and conditions for preparing the carrier or drying conditions such as temperature, time, vacuum or spray drying.
- the amount of the hydroxyl group is less than 0.1 mmol/g, the reaction site with the cocatalyst is small, and if it exceeds 10 mmol/g, it is not preferable because it may be due to moisture other than the hydroxyl group present on the surface of the carrier particle. not.
- the polyethylene according to the present invention can be prepared by polymerizing an ethylene monomer in the presence of the above-described hybrid metallocene catalyst.
- it may be prepared by copolymerizing an ethylene monomer and another olefin-based comonomer together.
- olefinic monomer examples include 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-dodecene, There are 1-tetradecene, 1-hexadecene, 1-eicosene, and the like, and two or more of them can be mixed and copolymerized.
- the content of the alpha olefin, which is the comonomer is not particularly limited, and may be appropriately selected according to the use and purpose of the polyethylene.
- the polymerization reaction may be carried out by polymerization using one continuous slurry polymerization reactor, a loop slurry reactor, a gas phase reactor, or a solution reactor.
- the polymerization temperature may be about 25 to about 500°C, preferably about 25 to about 200°C, and more preferably about 50 to about 150°C.
- the polymerization pressure may be about 1 to about 100 Kgf/cm 2, preferably about 1 to about 50 Kgf/cm 2, more preferably about 5 to about 30 Kgf/cm 2.
- the metallocene catalyst is an aliphatic hydrocarbon solvent having 5 to 12 carbon atoms, such as pentane, hexane, heptane, nonane, decane, and isomers thereof, and an aromatic hydrocarbon solvent such as toluene and benzene, and chlorine such as dichloromethane and chlorobenzene. It can be dissolved or diluted in an atom-substituted hydrocarbon solvent and injected.
- the solvent used here is preferably used after removing a small amount of water or air, which acts as a catalyst poison, by treating a small amount of alkyl aluminum, and it is possible to further use a cocatalyst.
- a crosslinked polyethylene pipe including the polyethylene is provided.
- the crosslinked polyethylene pipe of the present invention may be manufactured by extruding the polyethylene described above into RAM.
- the RAM extrusion molding is used in an extrusion molding field requiring uniform and high pressure, and has an effect of processing a polyethylene resin having a high molecular weight when manufacturing a crosslinked polyethylene pipe compared to screw extrusion molding.
- the RAM extrusion molding may be performed by a method used for manufacturing a conventional crosslinked polyethylene pipe, and is not particularly limited.
- the crosslinked polyethylene pipe when preparing the crosslinked polyethylene pipe, it may be extruded by mixing a conventional crosslinking agent and an antioxidant together with the polyethylene of the present invention.
- an organic peroxide crosslinking agent may be used, and specific examples of the organic peroxide crosslinking agent include DTBP (Di-t-butyl peroxide), dicumyl peroxide, and di-t-amyl peroxide. t-amyl peroxide), 2,5-dimethyl-2,5-di (t-butylperoxy) hexane (2,5-Dimethyl-2,5-di (t-butylperoxy) hexane), etc.
- the invention is not limited thereto.
- the content of the crosslinking agent is not particularly limited, but may be included in an amount of 0.4 to 1 part by weight based on 100 parts by weight of polyethylene.
- a phenolic antioxidant may be used, and specific examples of the phenolic antioxidant include IRGANOX1076, IRGANOX1010, BHT, songnox 1076, and the like, but the present invention is not limited thereto.
- the content of the antioxidant is not particularly limited, but may be included in an amount of 0.1 to 0.6 parts by weight based on 100 parts by weight of polyethylene.
- the crosslinked pipe may be a PE-Xa pipe.
- crosslinked polyethylene pipe according to an embodiment of the present invention may have a degree of crosslinking of 70% or more measured according to KS M ISO 10147.
- the crosslinked polyethylene pipe of the present invention has a degree of crosslinking of 70% or more, or 75% or more, or 77% or more, or 80% or more, or 81% or more, as measured according to KS M ISO 10147. , Or 82% or more, or 83% or more, and 99% or less, or 96% or less, or 93% or less.
- the crosslinked polyethylene pipe of the present invention may have excellent mechanical strength.
- crosslinked polyethylene pipe according to an embodiment of the present invention may have a hoop stress measured according to ISO 1167-1 of 18.5 MPa or more.
- the crosslinked polyethylene pipe of the present invention has a hoop stress of 18.5 MPa or more, or 18.7 MPa or more, or 18.7 MPa or more, and 25 MPa or less, 24 MPa or less, or 22 MPa. It can be below.
- the crosslinked polyethylene pipe of the present invention may have excellent pressure resistance.
- t-Butyl-O-(CH 2 ) 6 -Cl was prepared by the method suggested in the literature (Tetrahedron Lett. 2951 (1988)), and NaCp was reacted thereto.
- t-Butyl-O-(CH 2 ) 6 -C 5 H 5 was obtained (yield 60%, bp 80°C / 0.1 mmHg).
- t-Butyl-O-(CH 2 ) 6 -C 5 H 5 was dissolved in THF at -78°C, and normal butyllithium (n-BuLi) was slowly added, the temperature was raised to room temperature, and then reacted for 8 hours. .
- the previously synthesized lithium salt solution was slowly added to the suspension solution of ZrCl 4 (THF) 2 (1.70 g, 4.50 mmol)/THF (30 mL) at -78°C again at room temperature. It was further reacted for 6 hours.
- the supported catalyst prepared in Preparation Example 1 was added to a single slurry polymerization process to prepare high-density polyethylene.
- hexane 25 ton/hr, ethylene 10 ton/hr, hydrogen 35 ppm (relative to ethylene), and triethyl aluminum (TEAL) 10 kg/hr were respectively injected into a reactor having a capacity of 100 m 3 , and also in Preparation Example 1
- the hybrid supported metallocene catalyst was injected at 0.5 kg/h. Accordingly, the ethylene was continuously reacted in a hexane slurry state at a reactor temperature of 82° C. and a pressure of 7.0 kg/cm 2 to 7.5 kg/cm 2 , and then a high-density polyethylene in powder form was prepared through a solvent removal and drying process.
- n-Octadecyl-3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionate (trade name Irganox 1076, manufactured by BASF) as an antioxidant and Di-tert as a crosslinking agent
- 0.6 g of -butyl peroxide (trade name Trigonox B, manufactured by Akzo Nobel) was mixed and dispersed using a Henschell Mixer (RPM 400, mixing time 15min, Mix temp ⁇ 40°C).
- a crosslinked polyethylene pipe was manufactured in the same manner as in Example 3, except that the polyethylene of Example 2 was used instead of the polyethylene of Example 1.
- a crosslinked polyethylene pipe was manufactured in the same manner as in Example 3, except that the polyethylene of Comparative Example 1 was used instead of the polyethylene of Example 1.
- a crosslinked polyethylene pipe was manufactured in the same manner as in Example 3, except that the polyethylene of Comparative Example 2 was used instead of the polyethylene of Example 1.
- polyethylene samples were evaluated using a Waters PL-GPC220 instrument using a Polymer Laboratories PLgel MIX-B 300 mm length column.
- the evaluation temperature was 160 °C
- 1,2,4-trichlorobenzene was used as a solvent, and the flow rate was measured at a rate of 1 mL/min.
- the sample was prepared at a concentration of 10 mg/10 mL, and then supplied in an amount of 200 ⁇ L.
- the values of Mw and Mn were measured using a calibration curve formed using polystyrene standards.
- the molecular weight of the polystyrene standard was 2,000 / 10,000 / 30,000 / 70,000 / 200,000 / 700,000 / 2,000,000 / 4,000,000 / 10,000,000.
- MI 21.6 Melt Index
- the pressure at which ductile failure occurs within 5 minutes after increasing the pressure at room temperature (25°C) was measured and calculated as Hoop stress.
- the internal pressure test method was conducted according to ISO 1167-1 in order to find the Hoop stress where ductile failure occurs.
- the polyethylene of Examples 1 to 2 according to the present invention exhibited higher melt index (MI 21.6 ) and density than the comparative examples.
- the hoop stress of the crosslinked polyethylene of Examples 3 to 5 was high, so that the pressure resistance was improved, and the degree of crosslinking was at the same level as the comparative examples.
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Abstract
Description
가교 폴리에틸렌 | 실시예 3 | 실시예 4 | 실시예 5 | 비교예 3 | 비교예 4 | 비교예 5 |
폴리에틸렌 | 실시예 1 | 실시예 2 | 실시예 2 | 비교예 1 | 비교예 1 | 비교예 2 |
Mn (g/mol) | 40,500 | 44,300 | 44,300 | 53,900 | 53,900 | 52,200 |
Mw (g/mol) | 147,000 | 165,000 | 165,000 | 221,000 | 221,000 | 231,000 |
MWD | 3.1 | 3.0 | 3.0 | 3.9 | 3.9 | 4.1 |
MI 21.6 (g/10min) | 10 | 7 | 7 | 2 | 2 | 1.5 |
Density (g/cm 3) | 0.952 | 0.951 | 0.951 | 0.948 | 0.948 | 0.945 |
Log MW ≤4.5 (%)* | 19 | 17 | 17 | 16 | 16 | 16 |
가교도(%) | 86 | 88 | 87 | 87 | 86 | 75 |
hoop stress (MPa) | 19.3 | 18.9 | 19.1 | 18.8 | 18.9 | 18.1 |
Claims (11)
- ASTM D792에 따라 측정한 밀도가 0.940 g/cm 3 이상 0.960 g/cm 3 이하;수 평균 분자량(Mn)이 20,000 g/mol 이상 70,000 g/mol 이하;중량 평균 분자량(Mw)이 100,000 g/mol 이상 250,000 g/mol 이하;분자량 분포(PDI, Mw/Mn)가 2.5 이상 3.7 이하; 및ASTM D1238에 따라 190℃의 온도 및 21.6 kg의 하중 하에서 측정한 용융 지수(MI 21.6)가 1 g/10min 이상 10 g/10min 이하;를 만족하는, 폴리에틸렌(polyethylene)
- 제1항에 있어서,상기 Log Mw 값이 4.5 이하인 영역의 적분값이 전체 적분값에 대하여 25% 이하인, 폴리에틸렌.
- 제1항에 있어서,중량 평균 분자량(Mw)이 100,000 g/mol 이상 200,000 g/mol 이하인, 폴리에틸렌.
- 제1항에 있어서,상기 폴리에틸렌은 화학식 1로 표시되는 제 1 메탈로센 화합물; 및 하기 화학식 3으로 표시되는 제 2 메탈로센 화합물을 포함하며, 상기 제 1 메탈로센 화합물 대 제 2 메탈로센 화합물의 몰비는 1:5 내지 1:20인 혼성 메탈로센 촉매의 존재 하에, 에틸렌 단량체를 중합하여 제조되는, 폴리에틸렌:[화학식 1]상기 화학식 1에서,Q 1 및 Q 2는 서로 동일하거나 상이하고, 각각 독립적으로 수소, 할로겐, C1 내지 C20의 알킬기, C2 내지 C20의 알케닐기, C2 내지 C20의 알콕시알킬기, C6 내지 C20의 아릴기, C7 내지 C20의 알킬아릴기, 또는 C7 내지 C20의 아릴알킬기이고;B는 탄소, 실리콘, 또는 게르마늄이고;M 1은 4족 전이금속이며;X 1 및 X 2는 서로 동일하거나 상이하고, 각각 독립적으로 할로겐, C1 내지 C20의 알킬기, C2 내지 C10의 알케닐기, C6 내지 C20의 아릴기, C7 내지 C20의 알킬아릴기, 또는 C7 내지 C20의 아릴알킬기이고;C 1 및 C 2는 중 하나는 하기 화학식 2a 또는 화학식 2b로 표시되고, C 1 및 C 2는 중 나머지 하나는 하기 화학식 2c로 표시되며;[화학식 2a][화학식 2b][화학식 2c]상기 화학식 2a, 2b, 및 2c에서,R 1 내지 R 21 및 R 1' 내지 R 13'은 서로 동일하거나 상이하고, 각각 독립적으로 수소, 할로겐, C1 내지 C20의 알킬기, C1 내지 C20의 할로 알킬기, C2 내지 C20의 알케닐기, C1 내지 C20의 알킬실릴기, C1 내지 C20의 실릴알킬기, C1 내지 C20의 알콕시실릴기, C1 내지 C20의 알콕시기, C6 내지 C20의 아릴기, C7 내지 C20의 알킬아릴기, 또는 C7 내지 C20의 아릴알킬기이며, 단, R 9 내지 R 13 및 R 9' 내지 R 13' 중 하나 이상은 C1 내지 C20의 할로 알킬기이고,[화학식 3]상기 화학식 3에서,M 2는 4족 전이금속이고;Cp 1 및 Cp 2은 서로 동일하거나 상이하고, 각각 독립적으로 사이클로펜타디에닐, 인데닐, 4,5,6,7-테트라하이드로-1-인데닐 및 플루오레닐로 이루어진 군으로부터 선택된 어느 하나의 고리 화합물이고, 상기 고리 화합물의 하나 이상의 수소는 각각 독립적으로 C1 내지 20의 알킬, C1 내지 C20의 알콕시, C2 내지 C20의 알콕시알킬, C6 내지 C20의 아릴, C7 내지 C20의 알킬아릴, 또는 C7 내지 C20의 아릴알킬중 어느 하나의 치환기로 치환될 수 있고;X 3 및 X 4는 서로 동일하거나 상이하고, 각각 독립적으로 할로겐, C1 내지 C20의 알킬, C2 내지 C10의 알케닐, C6 내지 C20의 아릴, C7 내지 C20의 알킬아릴, 또는 C7 내지 C20의 아릴알킬이다.
- 제4항에 있어서,상기 화학식 2a, 2b, 및 2c의 R 1 내지 R 21 및 R 1' 내지 R 13'은 각각 독립적으로 수소, 할로겐, C1 내지 C20의 알킬기, 또는 C1 내지 C20의 할로 알킬기이고, R 9 내지 R 13 및 R 9' 내지 R 13' 중 하나 이상은 C1 내지 C20의 할로 알킬기인, 폴리에틸렌.
- 제1항의 폴리에틸렌 및 가교제의 가교 반응에 의해 제조되는, 가교 폴리에틸렌 파이프.
- 제8항에 있어서,상기 가교제는 DTBP(Di-t-butyl peroxide), 디큐밀 퍼옥사이드(Dicumyl peroxide), 디-t-아밀 퍼옥사이드(Di-t-amyl peroxide), 및 2,5-디메틸-2,5-디(t-부틸퍼옥시)헥산(2,5-Dimethyl- 2,5-di(t-butylperoxy)hexane)으로 이루어진 군으로부터 선택되는 1종 이상을 포함하는, 가교 폴리에틸렌 파이프.
- 제8항에 있어서,KS M ISO 10147에 따라 측정한 가교도가 70% 이상인, 가교 폴리에틸렌 파이프.
- 제8항에 있어서,상기 파이프는 PE-Xa 파이프인, 가교 폴리에틸렌 파이프.
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EP20759132.2A EP3882281A4 (en) | 2019-02-20 | 2020-02-20 | HIGH COMPRESSIVE STRENGTH POLYETHYLENE AND CROSSLINKED POLYETHYLENE PIPE WITH IT |
CN202080006546.1A CN113195552B (zh) | 2019-02-20 | 2020-02-20 | 具有高耐压性的聚乙烯和包含该聚乙烯的交联聚乙烯管 |
CA3123238A CA3123238A1 (en) | 2019-02-20 | 2020-02-20 | Polyethylene having high pressure resistance and crosslinked polyethylene pipe comprising the same |
BR112021012527-2A BR112021012527A2 (pt) | 2019-02-20 | 2020-02-20 | Polietileno com alta resistência à pressão e tubo de polietileno reticulado compreendendo mesmo |
US17/414,616 US12065514B2 (en) | 2019-02-20 | 2020-02-20 | Polyethylene having high pressure resistance and crosslinked polyethylene pipe comprising the same |
CN202311486617.4A CN117510688A (zh) | 2019-02-20 | 2020-02-20 | 具有高耐压性的聚乙烯和包含该聚乙烯的交联聚乙烯管 |
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