JPS61141741A - ブタジエン系ゴム組成物 - Google Patents
ブタジエン系ゴム組成物Info
- Publication number
- JPS61141741A JPS61141741A JP26328584A JP26328584A JPS61141741A JP S61141741 A JPS61141741 A JP S61141741A JP 26328584 A JP26328584 A JP 26328584A JP 26328584 A JP26328584 A JP 26328584A JP S61141741 A JPS61141741 A JP S61141741A
- Authority
- JP
- Japan
- Prior art keywords
- polymer
- butadiene
- lithium
- rubber composition
- isocyanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- 239000005062 Polybutadiene Substances 0.000 title description 3
- 229920002857 polybutadiene Polymers 0.000 title description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000012948 isocyanate Substances 0.000 claims abstract description 24
- 229920001971 elastomer Polymers 0.000 claims abstract description 21
- 239000005060 rubber Substances 0.000 claims abstract description 21
- 229920001577 copolymer Polymers 0.000 claims abstract description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 150000001993 dienes Chemical class 0.000 claims abstract description 11
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 8
- 230000009477 glass transition Effects 0.000 claims abstract description 6
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 5
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 3
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 3
- -1 isocyanate compound Chemical class 0.000 claims description 29
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 25
- 238000005096 rolling process Methods 0.000 abstract description 14
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 abstract 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 abstract description 4
- 150000002513 isocyanates Chemical class 0.000 abstract description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 125000005442 diisocyanate group Chemical group 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- BZEZSORUWZUMNU-UHFFFAOYSA-N [Li]CCCC[Li] Chemical compound [Li]CCCC[Li] BZEZSORUWZUMNU-UHFFFAOYSA-N 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 150000002641 lithium Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 1
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 1
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 1
- FRASJONUBLZVQX-UHFFFAOYSA-N 1,4-naphthoquinone Chemical compound C1=CC=C2C(=O)C=CC(=O)C2=C1 FRASJONUBLZVQX-UHFFFAOYSA-N 0.000 description 1
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 description 1
- GGFMVTNGEQRGIO-UHFFFAOYSA-N 1-ethenyl-2-methylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CC1=CC=CC=C1C=C GGFMVTNGEQRGIO-UHFFFAOYSA-N 0.000 description 1
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VIZORQUEIQEFRT-UHFFFAOYSA-N Diethyl adipate Chemical compound CCOC(=O)CCCCC(=O)OCC VIZORQUEIQEFRT-UHFFFAOYSA-N 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 239000005063 High cis polybutadiene Substances 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- HDONYZHVZVCMLR-UHFFFAOYSA-N N=C=O.N=C=O.CC1CCCCC1 Chemical compound N=C=O.N=C=O.CC1CCCCC1 HDONYZHVZVCMLR-UHFFFAOYSA-N 0.000 description 1
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 125000001979 organolithium group Chemical group 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- DGTNSSLYPYDJGL-UHFFFAOYSA-N phenyl isocyanate Chemical compound O=C=NC1=CC=CC=C1 DGTNSSLYPYDJGL-UHFFFAOYSA-N 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26328584A JPS61141741A (ja) | 1984-12-13 | 1984-12-13 | ブタジエン系ゴム組成物 |
| GB08530732A GB2169905A (en) | 1984-12-13 | 1985-12-13 | Conjugated diene based rubber composition |
| US07/039,833 US4742117A (en) | 1984-12-13 | 1987-04-17 | Conjugated diene based rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26328584A JPS61141741A (ja) | 1984-12-13 | 1984-12-13 | ブタジエン系ゴム組成物 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61141741A true JPS61141741A (ja) | 1986-06-28 |
| JPH045060B2 JPH045060B2 (enrdf_load_stackoverflow) | 1992-01-30 |
Family
ID=17387339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26328584A Granted JPS61141741A (ja) | 1984-12-13 | 1984-12-13 | ブタジエン系ゴム組成物 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61141741A (enrdf_load_stackoverflow) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6330502A (ja) * | 1986-07-25 | 1988-02-09 | Nippon Erasutomaa Kk | 新規なランダムスチレン−ブタジエン共重合体およびその組成物 |
| JPS63191844A (ja) * | 1987-02-04 | 1988-08-09 | Yokohama Rubber Co Ltd:The | タイヤトレツド用ゴム組成物 |
| US5484836A (en) * | 1993-09-08 | 1996-01-16 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire tread |
| US5500482A (en) * | 1993-09-20 | 1996-03-19 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire tread |
| US6191234B1 (en) * | 1997-12-16 | 2001-02-20 | Jsr Corporation | Conjugated diolefin-based copolymer rubber and composition thereof |
| WO2005087814A1 (ja) | 2004-03-15 | 2005-09-22 | Jsr Corporation | 共役ジオレフィン（共）重合ゴムおよびその製造方法 |
| WO2006016512A1 (ja) | 2004-08-10 | 2006-02-16 | Jsr Corporation | ゴム組成物およびタイヤ |
| WO2006030806A1 (ja) * | 2004-09-14 | 2006-03-23 | Jsr Corporation | 共役ジオレフィン（共）重合ゴムの製造方法、共役ジオレフィン（共）重合ゴム、ゴム組成物、およびタイヤ |
| WO2008114756A1 (ja) | 2007-03-15 | 2008-09-25 | Jsr Corporation | 共役ジオレフィン共重合ゴム、その製造方法、ゴム組成物およびタイヤ |
-
1984
- 1984-12-13 JP JP26328584A patent/JPS61141741A/ja active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6330502A (ja) * | 1986-07-25 | 1988-02-09 | Nippon Erasutomaa Kk | 新規なランダムスチレン−ブタジエン共重合体およびその組成物 |
| JPS63191844A (ja) * | 1987-02-04 | 1988-08-09 | Yokohama Rubber Co Ltd:The | タイヤトレツド用ゴム組成物 |
| US5484836A (en) * | 1993-09-08 | 1996-01-16 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire tread |
| US5500482A (en) * | 1993-09-20 | 1996-03-19 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire tread |
| US6191234B1 (en) * | 1997-12-16 | 2001-02-20 | Jsr Corporation | Conjugated diolefin-based copolymer rubber and composition thereof |
| WO2005087814A1 (ja) | 2004-03-15 | 2005-09-22 | Jsr Corporation | 共役ジオレフィン（共）重合ゴムおよびその製造方法 |
| WO2006016512A1 (ja) | 2004-08-10 | 2006-02-16 | Jsr Corporation | ゴム組成物およびタイヤ |
| WO2006030806A1 (ja) * | 2004-09-14 | 2006-03-23 | Jsr Corporation | 共役ジオレフィン（共）重合ゴムの製造方法、共役ジオレフィン（共）重合ゴム、ゴム組成物、およびタイヤ |
| JPWO2006030806A1 (ja) * | 2004-09-14 | 2008-05-15 | Jsr株式会社 | 共役ジオレフィン（共）重合ゴムの製造方法、共役ジオレフィン（共）重合ゴム、ゴム組成物、およびタイヤ |
| US7893164B2 (en) | 2004-09-14 | 2011-02-22 | Jsr Corporation | Process for producing conjugated diolefin (Co) polymer rubber, conjugated diolefin (Co) polymer rubber, rubber composition, and tire |
| WO2008114756A1 (ja) | 2007-03-15 | 2008-09-25 | Jsr Corporation | 共役ジオレフィン共重合ゴム、その製造方法、ゴム組成物およびタイヤ |
| US8022129B2 (en) | 2007-03-15 | 2011-09-20 | Jsr Corporation | Conjugated diolefin copolymer rubber, method for producing the same, rubber composition and tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH045060B2 (enrdf_load_stackoverflow) | 1992-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |