JPH0232284B2 - - Google Patents
Info
- Publication number
- JPH0232284B2 JPH0232284B2 JP55010817A JP1081780A JPH0232284B2 JP H0232284 B2 JPH0232284 B2 JP H0232284B2 JP 55010817 A JP55010817 A JP 55010817A JP 1081780 A JP1081780 A JP 1081780A JP H0232284 B2 JPH0232284 B2 JP H0232284B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- modifier
- polybutadiene
- glycol dimethyl
- dimethyl ether
- 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.)
- Expired - Lifetime
Links
- 239000003607 modifier Substances 0.000 claims description 42
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 35
- 239000003054 catalyst Substances 0.000 claims description 35
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 26
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 24
- 229920002554 vinyl polymer Polymers 0.000 claims description 24
- 229910052744 lithium Inorganic materials 0.000 claims description 22
- 229920002857 polybutadiene Polymers 0.000 claims description 21
- 239000005062 Polybutadiene Substances 0.000 claims description 18
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 16
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 14
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- -1 alkyl lithium Chemical compound 0.000 claims description 9
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 9
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 7
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 7
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 6
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 5
- 239000012973 diazabicyclooctane Substances 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 claims description 2
- FTTATHOUSOIFOQ-UHFFFAOYSA-N 1,2,3,4,6,7,8,8a-octahydropyrrolo[1,2-a]pyrazine Chemical compound C1NCCN2CCCC21 FTTATHOUSOIFOQ-UHFFFAOYSA-N 0.000 claims 3
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 claims 2
- YPUWDDMFYRNEFX-UHFFFAOYSA-N 1-methoxy-2-[2-(2-methoxyethoxy)ethoxy]ethane Chemical compound COCCOCCOCCOC.COCCOCCOCCOC YPUWDDMFYRNEFX-UHFFFAOYSA-N 0.000 claims 1
- 229920000642 polymer Polymers 0.000 description 20
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 13
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 4
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 4
- 230000029936 alkylation Effects 0.000 description 3
- 238000005804 alkylation reaction Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 241001441571 Hiodontidae Species 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- NAMDIHYPBYVYAP-UHFFFAOYSA-N 1-methoxy-2-(2-methoxyethoxy)ethane Chemical compound COCCOCCOC.COCCOCCOC NAMDIHYPBYVYAP-UHFFFAOYSA-N 0.000 description 1
- QJGBFUGRZBMDIB-UHFFFAOYSA-N COCCOC.COCCOC.COCCOC.COCCOC.COCCOCCOCCOCCOC Chemical compound COCCOC.COCCOC.COCCOC.COCCOC.COCCOCCOCCOCCOC QJGBFUGRZBMDIB-UHFFFAOYSA-N 0.000 description 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006085 branching agent Substances 0.000 description 1
- DLIJPAHLBJIQHE-UHFFFAOYSA-N butylphosphane Chemical compound CCCCP DLIJPAHLBJIQHE-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- HQWPLXHWEZZGKY-UHFFFAOYSA-N diethylzinc Chemical compound CC[Zn]CC HQWPLXHWEZZGKY-UHFFFAOYSA-N 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- BLHLJVCOVBYQQS-UHFFFAOYSA-N ethyllithium Chemical compound [Li]CC BLHLJVCOVBYQQS-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 1
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006478 transmetalation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/10—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerization Catalysts (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Polymerisation Methods In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/007,741 US4230841A (en) | 1979-01-31 | 1979-01-31 | Process for medium vinyl polybutadiene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55104313A JPS55104313A (en) | 1980-08-09 |
| JPH0232284B2 true JPH0232284B2 (US20030204162A1-20031030-M00001.png) | 1990-07-19 |
Family
ID=21727885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1081780A Granted JPS55104313A (en) | 1979-01-31 | 1980-01-31 | Manufacture of medium vinylpolybutadiene |
Country Status (14)
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4230841A (en) * | 1979-01-31 | 1980-10-28 | The Goodyear Tire & Rubber Company | Process for medium vinyl polybutadiene |
| CA1141090A (en) * | 1979-04-23 | 1983-02-08 | Teiji Tsuruta | Linear polydivinylbenzene and derivative thereof |
| JPS56149413A (en) * | 1980-04-22 | 1981-11-19 | Japan Synthetic Rubber Co Ltd | Production of styrene/butadiene copolymer |
| CA1196138A (en) * | 1981-09-04 | 1985-10-29 | Edward J. Haas | Pneumatic tire with tread of medium vinyl polybutadiene/rubber blend |
| CA1229699A (en) * | 1982-01-04 | 1987-11-24 | William G. Carson | Increasing the reactivity of coupling homopolymers |
| JPS58154703A (ja) * | 1982-03-09 | 1983-09-14 | Daicel Chem Ind Ltd | 光学活性な高分子の合成方法 |
| US4473661A (en) * | 1982-07-01 | 1984-09-25 | The Firestone Tire & Rubber Company | Polymerization catalyst system containing organolithium, dialkyl magnesium and/or trialkyl aluminum, and a phosphine oxide |
| US4476240A (en) * | 1982-07-01 | 1984-10-09 | The Firestone Tire & Rubber Company | Catalyst system containing an anionic initiator based on lithium and phosphine oxide modifier |
| US4483381A (en) * | 1983-03-07 | 1984-11-20 | The Goodyear Tire & Rubber Company | Pneumatic tire with belt reinforcement |
| US4808657A (en) * | 1984-03-08 | 1989-02-28 | The Goodyear Tire & Rubber Company | Rubbery adhesive cements |
| US4530959A (en) * | 1984-03-08 | 1985-07-23 | The Goodyear Tire & Rubber Company | Pneumatic tire with tread of medium vinyl polybutadiene/rubber blend |
| GB8407629D0 (en) * | 1984-03-23 | 1984-05-02 | Shell Int Research | Preparation of polymers |
| US4522970A (en) * | 1984-06-25 | 1985-06-11 | The Goodyear Tire & Rubber Company | Tire with tread rubber containing medium vinyl polybutadiene with clay and carbon black |
| WO1989004843A1 (en) * | 1987-11-16 | 1989-06-01 | The Dow Chemical Company | Amine containing initiator system for anionic polymerization |
| US5070150A (en) * | 1990-07-02 | 1991-12-03 | The Goodyear Tire & Rubber Company | Process for the solid state (solventless) hydroxylation of vinyl-containing rubbers using a hydroxymercaptan |
| US5253691A (en) * | 1992-01-13 | 1993-10-19 | The Goodyear Tire & Rubber Company | Tire having specified belt rubber composition |
| US6025450A (en) * | 1992-10-02 | 2000-02-15 | Bridgestone Corporation | Amine containing polymers and products therefrom |
| US5329005A (en) * | 1992-10-02 | 1994-07-12 | Bridgestone Corporation | Soluble anionic polymerization initiators and preparation thereof |
| US5674798A (en) * | 1992-10-16 | 1997-10-07 | Bridgestone Corporation | Hydrocarbon soluble anionic polymerization initiators |
| USH2030H1 (en) * | 1993-06-29 | 2002-06-04 | Shell Oil Company | Process for the preparation of random copolymers of conjugated dienes and vinyl aromatic compounds |
| US5728782A (en) * | 1996-12-06 | 1998-03-17 | Union Carbide Chemicals & Plastics Technology Corporation | Gas phase anionic polymerization of dienes and vinyl-substituted aromatic compounds |
| US6160063A (en) * | 1999-12-30 | 2000-12-12 | Bridgestone Corporation | Iron-based catalyst for producing binary cis-1,4-/1,2-polybutadiene |
| US6362282B1 (en) | 2000-09-29 | 2002-03-26 | Firestone Polymers, Llc | Polymers with high vinyl end segments |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3451988A (en) * | 1966-10-25 | 1969-06-24 | Exxon Research Engineering Co | Polymerization catalyst and uses thereof |
| US3935177A (en) * | 1973-11-09 | 1976-01-27 | Bayer Aktiengesellschaft | Polymerisation and copolymerisation of dienes |
| US3966691A (en) * | 1973-07-12 | 1976-06-29 | The Firestone Tire & Rubber Company | Polymerization of conjugated dienes with starved lithium, potassium or sodium catalyst |
| US4022959A (en) * | 1969-11-22 | 1977-05-10 | Chemische Werke Huels Aktiengesellschaft | Organolithium-Lewis base polymerization of 1,3-butadiene and novel polybutadienes thus produced |
| US4085265A (en) * | 1972-08-25 | 1978-04-18 | Nippon Oil Company, Limited | Process for isomerization of lower polymers of butadiene |
| US4230841A (en) * | 1979-01-31 | 1980-10-28 | The Goodyear Tire & Rubber Company | Process for medium vinyl polybutadiene |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3725368A (en) * | 1970-01-19 | 1973-04-03 | Lithium Corp | Preparation of polymers |
| US3804486A (en) * | 1972-07-20 | 1974-04-16 | Bausch & Lomb | Adapter stand for converting a binocular to a microscope |
-
1979
- 1979-01-31 US US06/007,741 patent/US4230841A/en not_active Expired - Lifetime
-
1980
- 1980-01-02 ZA ZA00800013A patent/ZA8013B/xx unknown
- 1980-01-02 GB GB8000044A patent/GB2040961B/en not_active Expired
- 1980-01-02 AU AU54273/80A patent/AU526516B2/en not_active Ceased
- 1980-01-04 CA CA000343070A patent/CA1136341A/en not_active Expired
- 1980-01-07 NL NLAANVRAGE8000071,A patent/NL185081C/xx not_active IP Right Cessation
- 1980-01-16 IT IT47615/80A patent/IT1127335B/it active
- 1980-01-17 FR FR8000958A patent/FR2447938A1/fr active Granted
- 1980-01-18 KR KR1019800000178A patent/KR830001350B1/ko active
- 1980-01-22 BR BR8000378A patent/BR8000378A/pt unknown
- 1980-01-25 BE BE0/199119A patent/BE881357A/fr unknown
- 1980-01-29 DE DE19803003097 patent/DE3003097A1/de active Granted
- 1980-01-31 RO RO80100034A patent/RO79700A/ro unknown
- 1980-01-31 JP JP1081780A patent/JPS55104313A/ja active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3451988A (en) * | 1966-10-25 | 1969-06-24 | Exxon Research Engineering Co | Polymerization catalyst and uses thereof |
| US4022959A (en) * | 1969-11-22 | 1977-05-10 | Chemische Werke Huels Aktiengesellschaft | Organolithium-Lewis base polymerization of 1,3-butadiene and novel polybutadienes thus produced |
| US4085265A (en) * | 1972-08-25 | 1978-04-18 | Nippon Oil Company, Limited | Process for isomerization of lower polymers of butadiene |
| US3966691A (en) * | 1973-07-12 | 1976-06-29 | The Firestone Tire & Rubber Company | Polymerization of conjugated dienes with starved lithium, potassium or sodium catalyst |
| US3935177A (en) * | 1973-11-09 | 1976-01-27 | Bayer Aktiengesellschaft | Polymerisation and copolymerisation of dienes |
| US4230841A (en) * | 1979-01-31 | 1980-10-28 | The Goodyear Tire & Rubber Company | Process for medium vinyl polybutadiene |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3003097C2 (US20030204162A1-20031030-M00001.png) | 1988-12-29 |
| KR830001350B1 (ko) | 1983-07-14 |
| CA1136341A (en) | 1982-11-23 |
| AU5427380A (en) | 1980-08-07 |
| NL185081B (nl) | 1989-08-16 |
| GB2040961A (en) | 1980-09-03 |
| FR2447938B1 (US20030204162A1-20031030-M00001.png) | 1985-05-17 |
| AU526516B2 (en) | 1983-01-13 |
| NL8000071A (nl) | 1980-08-04 |
| FR2447938A1 (fr) | 1980-08-29 |
| JPS55104313A (en) | 1980-08-09 |
| US4230841A (en) | 1980-10-28 |
| BE881357A (fr) | 1980-05-16 |
| NL185081C (nl) | 1990-01-16 |
| KR830001985A (ko) | 1983-05-21 |
| RO79700A (ro) | 1982-08-17 |
| BR8000378A (pt) | 1980-10-21 |
| ZA8013B (en) | 1980-11-26 |
| GB2040961B (en) | 1983-05-25 |
| IT8047615A0 (it) | 1980-01-16 |
| IT1127335B (it) | 1986-05-21 |
| DE3003097A1 (de) | 1980-08-07 |
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