SG11201908253UA - Electron donors for ziegler-natta precatalyst preparation and catalyst system for olefin polymerization - Google Patents
Electron donors for ziegler-natta precatalyst preparation and catalyst system for olefin polymerizationInfo
- Publication number
- SG11201908253UA SG11201908253UA SG11201908253UA SG11201908253UA SG 11201908253U A SG11201908253U A SG 11201908253UA SG 11201908253U A SG11201908253U A SG 11201908253UA SG 11201908253U A SG11201908253U A SG 11201908253UA
- Authority
- SG
- Singapore
- Prior art keywords
- international
- co8f
- pct
- ziegler
- electron donor
- Prior art date
Links
- 238000006116 polymerization reaction Methods 0.000 title abstract 3
- 239000012041 precatalyst Substances 0.000 title abstract 3
- 150000001336 alkenes Chemical class 0.000 title abstract 2
- 239000003054 catalyst Substances 0.000 title abstract 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- 238000010828 elution Methods 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 230000008520 organization Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 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
- 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
- C08F4/65—Pretreating the metal or compound covered by group C08F4/64 before the final contacting with the metal or compound covered by group C08F4/44
- C08F4/652—Pretreating with metals or metal-containing compounds
- C08F4/654—Pretreating with metals or metal-containing compounds with magnesium or compounds thereof
- C08F4/6543—Pretreating with metals or metal-containing compounds with magnesium or compounds thereof halides of magnesium
- C08F4/6545—Pretreating with metals or metal-containing compounds with magnesium or compounds thereof halides of magnesium and metals of C08F4/64 or compounds thereof
-
- 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
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
-
- 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
- C08F10/04—Monomers containing three or four carbon atoms
- C08F10/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
- C07F7/0816—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring said ring comprising Si as a ring atom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/30—Germanium compounds
-
- 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
- C08F4/642—Component covered by group C08F4/64 with an organo-aluminium compound
- C08F4/6421—Titanium tetrahalides with organo-aluminium compounds
-
- 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
- C08F4/643—Component covered by group C08F4/64 with a metal or compound covered by group C08F4/44 other than an organo-aluminium compound
- C08F4/6432—Component of C08F4/64 containing at least two different metals
- C08F4/6437—Component of C08F4/64 containing at least two different metals containing aluminium
-
- 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
- C08F4/646—Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64
- C08F4/6465—Catalysts comprising at least two different metals, in metallic form or as compounds thereof, in addition to the component covered by group C08F4/64 containing silicium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 13 September 2018 (13.09.2018) WIP0 I PCT omit VIII °nolo omioomim moiflom (10) International Publication Number WO 2018/164658 Al (51) International Patent Classification: CO8F 4/654 (2006.01) C08F 4/642 (2006.01) CO8F 4/646 (2006.01) C08F 2/38 (2006.01) CO8F 4/643 (2006.01) (21) International Application Number: PCT/US2017/020880 (22) International Filing Date: 06 March 2017 (06.03.2017) (25) Filing Language: English (26) Publication Language: English (71) Applicants: W.R. GRACE & CO.-CONN. [US/US]; 7500 Grace Drive, Columbia, Maryland 21044 (US). BRASKEM AMERICA, INC. [US/US]; 1735 Market Street, 28th Floor, Philadelphia, Pennsylvania 19103 (US). (72) Inventors: NGUYEN, Binh Thanh; 113 Crescent Bay Dr, League City, Texas 77573 (US). FERNANDES, Jonas Alves; 550 Technology Dr, Pittsburgh, Pennsylvania 15217 (US). XI, Zhenxing; 4638 Jaymar Drive, Sugar Land, Texas 77479 (US). (74) Agent: LOMPREY, Jeffrey R. et al.; Foley & Lardner LLP, 3000 K Street N.W., Suite 600, Washington, District of Columbia 20007 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (54) Title: ELECTRON DONORS FOR ZIEGLER-NATTA PRECATALYST PREPARATION AND CATALYST SYSTEM FOR = OLEFIN POLYMERIZATION R I \ -F 7 R2 (I) FIG .1 14 Electron Donor 4 Donor C H 2 : 3.0 psi 117 116 115 114 113 11 2 111 12 0 10 0 Rf Li_ 8 U) 0 6 0 E 4 o Amorphous Fraction • Elution Temperature at the Maximum Crystalline Peak (T etra.) 0 20 40 60 80 100 Al/Si O (57) : A solid precatalyst component for use in olefmic polymerization, includes titanium, magnesium, and an electron donor C compound; wherein: the electron donor compound is at least one compound represented by Formula (I). [Continued on next page] WO 2018/164658 Al MIDEDIMOMMIDEFIE111111111111101111111111111101111111111111111111 Published: — with international search report (Art. 21(3))
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2017/020880 WO2018164658A1 (en) | 2017-03-06 | 2017-03-06 | Electron donors for ziegler-natta precatalyst preparation and catalyst system for olefin polymerization |
Publications (1)
Publication Number | Publication Date |
---|---|
SG11201908253UA true SG11201908253UA (en) | 2019-10-30 |
Family
ID=63449104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG11201908253U SG11201908253UA (en) | 2017-03-06 | 2017-03-06 | Electron donors for ziegler-natta precatalyst preparation and catalyst system for olefin polymerization |
Country Status (12)
Country | Link |
---|---|
US (1) | US11168158B2 (en) |
EP (1) | EP3592783A4 (en) |
JP (1) | JP6914348B2 (en) |
KR (1) | KR102305868B1 (en) |
CN (1) | CN110573535B (en) |
BR (1) | BR112019018488B1 (en) |
CA (1) | CA3054918A1 (en) |
MX (1) | MX2019010509A (en) |
RU (1) | RU2736726C1 (en) |
SA (1) | SA519410077B1 (en) |
SG (1) | SG11201908253UA (en) |
WO (1) | WO2018164658A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113710678A (en) * | 2019-03-31 | 2021-11-26 | 陶氏环球技术有限责任公司 | Method for preparing catalyst precursor material |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
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US2925409A (en) | 1957-07-10 | 1960-02-16 | Eastman Kodak Co | Germanium catalyst and process of polymerizing an alpha-monoolefinic hydrocarbon therewith |
EP0067607B1 (en) | 1981-06-02 | 1987-01-21 | Asahi Kasei Kogyo Kabushiki Kaisha | A catalyst for polymerization of olefins |
GB8316567D0 (en) | 1983-06-17 | 1983-07-20 | Contactasol Ltd | Measurement of contact lenses |
UA37171C2 (en) * | 1988-09-30 | 2001-05-15 | Монтелл Норт Америка Інк. | solid catalytic component for olefins polymerization and olefins polymerization catalyst |
US5166340A (en) | 1989-07-26 | 1992-11-24 | Himont Incorporated | Organosilane compounds |
CA1336596C (en) * | 1989-07-26 | 1995-08-08 | Constantine A. Stewart | Organosilane compounds |
US5434115A (en) | 1992-05-22 | 1995-07-18 | Tosoh Corporation | Process for producing olefin polymer |
US6001900A (en) | 1993-07-28 | 1999-12-14 | Elf Atochem North America, Inc. | Metal containing e-coat catalysts optionally with tin catalysts |
IT1269805B (en) | 1994-05-20 | 1997-04-15 | Enichem Spa | CATALYST FOR THE (CO) POLYMERIZATION OF ETHYLENE AND PROCEDURE FOR ITS OBTAINMENT |
US5652325A (en) | 1995-08-30 | 1997-07-29 | Mitsubishi Chemical Corporation | Production of aliphatic copolyesters |
FR2738826B1 (en) * | 1995-09-20 | 1997-10-17 | Atochem Elf Sa | ALCOXYSILACYCLOALCANES, THEIR PREPARATION PROCESS AND THEIR USE FOR THE POLYMERIZATION OF OLEFINS |
US6184319B1 (en) | 1996-12-20 | 2001-02-06 | Sumitomo Chemical Company, Limited | Olefin polymer, films or sheets made therefrom, and process for the production of olefin polymer |
ES2226005T3 (en) | 1997-01-14 | 2005-03-16 | Sabic Polypropylenes B.V. | A PROCEDURE FOR POLYMERIZING OLEFINS. |
GB9714181D0 (en) | 1997-07-05 | 1997-09-10 | Bp Chem Int Ltd | Polymerisation catalyst |
KR20010033872A (en) | 1998-11-04 | 2001-04-25 | 간디 지오프레이 에이치. | Components and catalysts for the polymerization of olefins |
WO2001042182A2 (en) | 1999-12-07 | 2001-06-14 | Basf Aktiengesellschaft | Method for producing o-chloromethyl benzoic acid chlorides |
AU2019201A (en) * | 1999-12-22 | 2001-07-03 | Basell Technology Company B.V. | Alpha-olefin polymerization catalyst system which contains an aromatic silane compound |
US7410927B2 (en) | 2005-04-13 | 2008-08-12 | Chevron Phillips Chemical Company, Lp | Catalysts for olefin polymerization |
US7579428B2 (en) | 2006-08-16 | 2009-08-25 | Eastman Chemical Company | Process for preparation of polyesters without solid state polymerization |
WO2009098198A1 (en) | 2008-02-07 | 2009-08-13 | Basell Poliolefine Italia S.R.L. | Catalyst for the polymerization of olefins |
US8088872B2 (en) | 2008-11-25 | 2012-01-03 | Dow Global Technologies Llc | Procatalyst composition including silyl ester internal donor and method |
BRPI0916175A8 (en) * | 2008-11-25 | 2017-09-19 | Union Carbide Chem Plastic | PROCATALYST COMPOSITION, CATALYST COMPOSITION AND PROCESS FOR PRODUCING AN OLEFIN-BASED POLYMER |
US8247341B2 (en) | 2009-04-17 | 2012-08-21 | Dow Global Technologies Llc | Procatalyst composition with silyl glutarate and method |
CN102746426A (en) | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Alkene polymerization catalyst, preparation thereof and application thereof |
US10654947B2 (en) * | 2011-10-28 | 2020-05-19 | Formosa Plastics Corporation, Usa | Cyclic organosilicon compounds as electron donors in Zeigler-Natta catalyst systems for producing propylene polymer having high melt-flowability |
EP2712875A1 (en) | 2012-09-28 | 2014-04-02 | Basell Poliolefine Italia S.r.l. | Catalyst components for the polymerization of olefins |
US10344103B2 (en) | 2014-09-11 | 2019-07-09 | Reliance Industries Limited | Ziegler-Natta catalyst composition for preparing polyethylene |
WO2016051315A1 (en) | 2014-09-29 | 2016-04-07 | Reliance Industries Limited | Ziegler-natta catalyst system and use thereof |
FR3027906B1 (en) | 2014-10-29 | 2017-01-06 | Roquette Freres | METHOD FOR MANUFACTURING POLYESTER CONTAINING AT LEAST ONE IMPROVED COLORATION 1,4: 3,6-DIANHYDROHEXITOL |
-
2017
- 2017-03-06 CN CN201780089685.3A patent/CN110573535B/en active Active
- 2017-03-06 MX MX2019010509A patent/MX2019010509A/en unknown
- 2017-03-06 CA CA3054918A patent/CA3054918A1/en active Pending
- 2017-03-06 BR BR112019018488-0A patent/BR112019018488B1/en active IP Right Grant
- 2017-03-06 SG SG11201908253U patent/SG11201908253UA/en unknown
- 2017-03-06 US US16/491,098 patent/US11168158B2/en active Active
- 2017-03-06 WO PCT/US2017/020880 patent/WO2018164658A1/en unknown
- 2017-03-06 KR KR1020197028799A patent/KR102305868B1/en active IP Right Grant
- 2017-03-06 JP JP2019548468A patent/JP6914348B2/en active Active
- 2017-03-06 RU RU2019131377A patent/RU2736726C1/en active
- 2017-03-06 EP EP17899625.2A patent/EP3592783A4/en active Pending
-
2019
- 2019-09-08 SA SA519410077A patent/SA519410077B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
RU2736726C1 (en) | 2020-11-19 |
BR112019018488B1 (en) | 2022-08-09 |
CN110573535A (en) | 2019-12-13 |
JP2020509143A (en) | 2020-03-26 |
WO2018164658A1 (en) | 2018-09-13 |
MX2019010509A (en) | 2019-12-18 |
JP6914348B2 (en) | 2021-08-04 |
EP3592783A4 (en) | 2020-11-25 |
US11168158B2 (en) | 2021-11-09 |
CA3054918A1 (en) | 2018-09-13 |
KR102305868B1 (en) | 2021-09-27 |
US20200010586A1 (en) | 2020-01-09 |
BR112019018488A2 (en) | 2020-04-14 |
EP3592783A1 (en) | 2020-01-15 |
SA519410077B1 (en) | 2022-08-30 |
CN110573535B (en) | 2022-07-08 |
KR20190117774A (en) | 2019-10-16 |
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