FI67714C - Foerfarande foer framstaellning av vattenloesliga akrylpolymerer eller -sampolymerer med hoeg molekylvikt och mycket laog restmonomerhalt - Google Patents
Foerfarande foer framstaellning av vattenloesliga akrylpolymerer eller -sampolymerer med hoeg molekylvikt och mycket laog restmonomerhalt Download PDFInfo
- Publication number
- FI67714C FI67714C FI801089A FI801089A FI67714C FI 67714 C FI67714 C FI 67714C FI 801089 A FI801089 A FI 801089A FI 801089 A FI801089 A FI 801089A FI 67714 C FI67714 C FI 67714C
- Authority
- FI
- Finland
- Prior art keywords
- layer
- alkali
- monomers
- rubbery
- powder
- Prior art date
Links
- 229920000058 polyacrylate Polymers 0.000 title claims abstract description 8
- 239000000178 monomer Substances 0.000 claims abstract description 55
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 24
- 239000003513 alkali Substances 0.000 claims description 19
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 6
- -1 alkali metal sulfite Chemical class 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 26
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 19
- 239000000203 mixture Substances 0.000 description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 239000011734 sodium Substances 0.000 description 12
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000000227 grinding Methods 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 229920001577 copolymer Polymers 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 235000010265 sodium sulphite Nutrition 0.000 description 6
- 150000001340 alkali metals Chemical class 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000176 sodium gluconate Substances 0.000 description 4
- 235000012207 sodium gluconate Nutrition 0.000 description 4
- 229940005574 sodium gluconate Drugs 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 3
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 235000002639 sodium chloride Nutrition 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 229910004840 Na2CO3—Na2SO4 Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- JXSVGTPMFNKSIC-UHFFFAOYSA-L [Cl-].CC[N+](C)(C)C.CC[N+](C)(C)C.CC(=C)C([O-])=O Chemical compound [Cl-].CC[N+](C)(C)C.CC[N+](C)(C)C.CC(=C)C([O-])=O JXSVGTPMFNKSIC-UHFFFAOYSA-L 0.000 description 2
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 2
- 229940001584 sodium metabisulfite Drugs 0.000 description 2
- 235000010262 sodium metabisulphite Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical class CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000005395 methacrylic acid group Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229920003169 water-soluble polymer Polymers 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
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Graft Or Block Polymers (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Polymerisation Methods In General (AREA)
- Medicinal Preparation (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7908596 | 1979-04-05 | ||
| FR7908596A FR2453185A1 (fr) | 1979-04-05 | 1979-04-05 | Procede de preparation de polymeres ou copolymeres acryliques hydrosolubles a poids moleculaire eleve et a faible teneur en monomere(s) residuels(s) |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI801089A FI801089A (fi) | 1980-10-06 |
| FI67714B FI67714B (fi) | 1985-01-31 |
| FI67714C true FI67714C (fi) | 1985-05-10 |
Family
ID=9223990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI801089A FI67714C (fi) | 1979-04-05 | 1980-04-03 | Foerfarande foer framstaellning av vattenloesliga akrylpolymerer eller -sampolymerer med hoeg molekylvikt och mycket laog restmonomerhalt |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4306955A (pt) |
| EP (1) | EP0017555B1 (pt) |
| JP (1) | JPS55135110A (pt) |
| AT (1) | ATE2624T1 (pt) |
| AU (1) | AU534765B2 (pt) |
| BR (1) | BR8002098A (pt) |
| CA (1) | CA1141329A (pt) |
| DE (1) | DE3062106D1 (pt) |
| DK (1) | DK149348C (pt) |
| ES (1) | ES490221A0 (pt) |
| FI (1) | FI67714C (pt) |
| FR (1) | FR2453185A1 (pt) |
| HU (1) | HU190662B (pt) |
| NO (1) | NO155139C (pt) |
| RO (1) | RO79701A (pt) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489336B1 (fr) | 1980-09-04 | 1985-09-13 | Rhone Poulenc Spec Chim | Procede de preparation de polymeres ou copolymeres hydrosolubles a poids moleculaire eleve et a faible teneur en monomere(s) residuel(s), a partir de monomeres olefiniquement insatures |
| FR2495217A1 (fr) * | 1980-11-28 | 1982-06-04 | Rhone Poulenc Ind | Utilisation d'un agent epaississant pour la recuperation du petrole |
| JPS57177008A (en) * | 1981-04-24 | 1982-10-30 | Nitto Chem Ind Co Ltd | Polymerization of aqueous solution |
| US4466931A (en) * | 1982-08-05 | 1984-08-21 | Gelman Sciences Inc. | Method for manufacturing microporous membrane |
| CA1226699A (en) * | 1984-01-13 | 1987-09-08 | Akira Yada | Process for preparing sticky polymers |
| US4790919A (en) * | 1984-06-28 | 1988-12-13 | E. I. Du Pont De Nemours And Company | Process for preparation of electrophoresis gel material |
| US4863647A (en) * | 1984-06-28 | 1989-09-05 | Baylor Jr Charles | Process for preparation of electrophoresis gel material |
| CA1253833A (en) * | 1984-11-06 | 1989-05-09 | Akira Yada | Process for preparing water-soluble polymer gel particles |
| CA1268732C (en) * | 1984-12-27 | 1990-05-08 | POLYMERIZATION BY RADIATION AND OBTAINING PARTICLES BY CASTING A LAYER OF WATER-SOLUBLE VINYL MONOMER | |
| JPS62235305A (ja) * | 1986-04-04 | 1987-10-15 | Dai Ichi Kogyo Seiyaku Co Ltd | 高分子量アクリル系重合体の製法 |
| JPS63260907A (ja) * | 1987-04-17 | 1988-10-27 | Mitsubishi Petrochem Co Ltd | 高吸水性ポリマ−の製造法 |
| US5126189A (en) * | 1987-04-21 | 1992-06-30 | Gelman Sciences, Inc. | Hydrophobic microporous membrane |
| ES2026653T3 (es) * | 1987-04-30 | 1992-05-01 | Nippon Shokubai Kagaku Kogyo Co., Ltd | Metodo para la produccion de un polimero hidrofilo. |
| DE3724709A1 (de) * | 1987-07-25 | 1989-02-02 | Stockhausen Chem Fab Gmbh | Verfahren zur herstellung von polymerisaten mit niedrigem restmonomergehalt |
| DE69030971T2 (de) * | 1989-09-04 | 1997-12-11 | Nippon Catalytic Chem Ind | Verfahren zur herstellung eines wasserabsorbierenden harzes |
| DE4212118A1 (de) * | 1992-04-10 | 1993-10-14 | Hoechst Ag | Vorrichtung zur Aufbereitung von Sondermüll |
| US6262141B1 (en) | 1999-10-06 | 2001-07-17 | Cytec Technology Corporation | Process for the preparation of polymers having low residual monomer content |
| DE10221176A1 (de) * | 2002-05-13 | 2003-11-27 | Basf Ag | Verfahren zur Herstellung geruchsarmer Hydrogelbildender Polymerisate |
| DE10257449A1 (de) * | 2002-12-09 | 2003-11-06 | Basf Ag | Verfahren zur Herstellung geruchsarmer Hydrogel-bildender Polymerisate |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1070377B (de) * | 1957-05-20 | 1959-12-03 | The Dow Chemical Company, Midland, Mich. (V. St. A.) | Verfahren zum Verringern des Monomcrenrestgehaltes eines Acrylsäureamidpolymerisats |
| FR2064729A5 (pt) * | 1969-10-22 | 1971-07-23 | Progil | |
| DE2009748A1 (de) * | 1970-03-03 | 1971-09-16 | Basf Ag | Verfahren zur Herstellung von wasser löslichen Polymerisaten |
| US3755280A (en) * | 1971-03-05 | 1973-08-28 | American Cyanamid Co | Drying of acrylamide polymer gels |
| US3780006A (en) * | 1971-10-26 | 1973-12-18 | Dow Chemical Co | Removal of monomer from acrylamide polymers with sulfur dioxide |
| FR2337738A1 (fr) * | 1976-01-09 | 1977-08-05 | Nitto Chemical Industry Co Ltd | Procede pour reduire l'adhesivite d'un hydrogel d'un polymere ou copolymere d'acrylamide hydrosoluble |
| FR2348227A1 (fr) * | 1976-04-14 | 1977-11-10 | Rhone Poulenc Ind | Perfectionnement aux procedes de preparation de polymeres acryliques hydrosolubles par photopolymerisation |
| US4187363A (en) * | 1978-05-24 | 1980-02-05 | The Goodyear Tire & Rubber Company | Vinyl chloride polymerization method |
-
1979
- 1979-04-05 FR FR7908596A patent/FR2453185A1/fr active Granted
-
1980
- 1980-03-24 EP EP80400391A patent/EP0017555B1/fr not_active Expired
- 1980-03-24 AT AT80400391T patent/ATE2624T1/de not_active IP Right Cessation
- 1980-03-24 DE DE8080400391T patent/DE3062106D1/de not_active Expired
- 1980-04-01 NO NO800951A patent/NO155139C/no unknown
- 1980-04-01 AU AU57018/80A patent/AU534765B2/en not_active Ceased
- 1980-04-02 DK DK144880A patent/DK149348C/da not_active IP Right Cessation
- 1980-04-02 BR BR8002098A patent/BR8002098A/pt unknown
- 1980-04-02 ES ES490221A patent/ES490221A0/es active Granted
- 1980-04-03 CA CA000349261A patent/CA1141329A/fr not_active Expired
- 1980-04-03 HU HU80811A patent/HU190662B/hu unknown
- 1980-04-03 FI FI801089A patent/FI67714C/fi not_active IP Right Cessation
- 1980-04-04 JP JP4365980A patent/JPS55135110A/ja active Granted
- 1980-04-04 RO RO80100721A patent/RO79701A/ro unknown
- 1980-04-04 US US06/137,484 patent/US4306955A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES8101083A1 (es) | 1980-12-01 |
| FR2453185B1 (pt) | 1982-12-17 |
| JPS6123926B2 (pt) | 1986-06-09 |
| RO79701A (ro) | 1982-09-09 |
| NO155139C (no) | 1987-02-18 |
| AU5701880A (en) | 1980-10-09 |
| EP0017555B1 (fr) | 1983-02-23 |
| DK149348C (da) | 1986-10-20 |
| FI67714B (fi) | 1985-01-31 |
| DK144880A (da) | 1980-10-06 |
| NO800951L (no) | 1980-10-06 |
| ES490221A0 (es) | 1980-12-01 |
| DK149348B (da) | 1986-05-12 |
| CA1141329A (fr) | 1983-02-15 |
| US4306955A (en) | 1981-12-22 |
| FI801089A (fi) | 1980-10-06 |
| NO155139B (no) | 1986-11-10 |
| FR2453185A1 (fr) | 1980-10-31 |
| BR8002098A (pt) | 1980-11-25 |
| ATE2624T1 (de) | 1983-03-15 |
| DE3062106D1 (en) | 1983-03-31 |
| AU534765B2 (en) | 1984-02-16 |
| HU190662B (en) | 1980-10-28 |
| EP0017555A1 (fr) | 1980-10-15 |
| JPS55135110A (en) | 1980-10-21 |
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