SE448997B - Komposition for anvendning som inkrustforhindrande beleggning i polymerisationsreaktorer - Google Patents
Komposition for anvendning som inkrustforhindrande beleggning i polymerisationsreaktorerInfo
- Publication number
- SE448997B SE448997B SE8201570A SE8201570A SE448997B SE 448997 B SE448997 B SE 448997B SE 8201570 A SE8201570 A SE 8201570A SE 8201570 A SE8201570 A SE 8201570A SE 448997 B SE448997 B SE 448997B
- Authority
- SE
- Sweden
- Prior art keywords
- reactor
- polyvinyl alcohol
- composition
- polymerization
- parts
- Prior art date
Links
- 238000006116 polymerization reaction Methods 0.000 title claims description 19
- 239000000203 mixture Substances 0.000 title claims description 13
- 230000002265 prevention Effects 0.000 title 1
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 13
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 12
- 235000002906 tartaric acid Nutrition 0.000 claims description 12
- 239000011975 tartaric acid Substances 0.000 claims description 12
- 238000006136 alcoholysis reaction Methods 0.000 claims description 10
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 10
- 239000011118 polyvinyl acetate Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- -1 carboxyloxy Chemical group 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 claims 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 19
- 239000000243 solution Substances 0.000 description 14
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000009826 distribution Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 7
- 238000007127 saponification reaction Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 206010039509 Scab Diseases 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000005755 formation reaction Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 229920001290 polyvinyl ester Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000011253 protective coating Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- VVSMKOFFCAJOSC-UHFFFAOYSA-L disodium;dodecylbenzene;sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O.CCCCCCCCCCCCC1=CC=CC=C1 VVSMKOFFCAJOSC-UHFFFAOYSA-L 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- AWDBHOZBRXWRKS-UHFFFAOYSA-N tetrapotassium;iron(6+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+6].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] AWDBHOZBRXWRKS-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
- C08F2/00—Processes of polymerisation
- C08F2/002—Scale prevention in a polymerisation reactor or its auxiliary parts
- C08F2/004—Scale prevention in a polymerisation reactor or its auxiliary parts by a prior coating on the reactor walls
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/14—Esterification
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Polymerisation Methods In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT20344/81A IT1137506B (it) | 1981-03-13 | 1981-03-13 | Composizione per il rivestimento delle pareti dei reattori e delle apparecchiature collegate,destinate alla polimerizzazione di composti vinilici,idonea ad evitare o ridurre depositi ed incrostazioni delle stesse apparecchiature e metodo per la sua utilizzazione |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8201570L SE8201570L (sv) | 1982-09-14 |
| SE448997B true SE448997B (sv) | 1987-03-30 |
Family
ID=11165891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8201570A SE448997B (sv) | 1981-03-13 | 1982-03-12 | Komposition for anvendning som inkrustforhindrande beleggning i polymerisationsreaktorer |
Country Status (22)
| Country | Link |
|---|---|
| US (1) | US4456731A (cs) |
| JP (1) | JPS57162703A (cs) |
| AR (1) | AR228178A1 (cs) |
| AT (1) | AT384429B (cs) |
| BE (1) | BE892474A (cs) |
| BR (1) | BR8201252A (cs) |
| CA (1) | CA1171595A (cs) |
| CH (1) | CH652141A5 (cs) |
| DE (1) | DE3209124A1 (cs) |
| DK (1) | DK155833C (cs) |
| ES (1) | ES510890A0 (cs) |
| FR (1) | FR2501702A1 (cs) |
| GB (1) | GB2094806B (cs) |
| IT (1) | IT1137506B (cs) |
| LU (1) | LU83996A1 (cs) |
| MX (1) | MX159747A (cs) |
| NL (1) | NL188167C (cs) |
| NO (1) | NO158064C (cs) |
| PT (1) | PT74564B (cs) |
| SE (1) | SE448997B (cs) |
| YU (1) | YU44335B (cs) |
| ZA (1) | ZA821222B (cs) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4613483A (en) * | 1984-11-07 | 1986-09-23 | The B. F. Goodrich Company | Coated polymerization vessels and methods for use thereof |
| US4748049A (en) * | 1986-03-27 | 1988-05-31 | Chemfil Corporation | Clear paint booth coating composition and method |
| IT1205543B (it) * | 1986-12-24 | 1989-03-23 | C I R S Cie Italiana Ricerca E | Agente anti-incrostante per la polimerizzazione di monomeri olefinici clorurati |
| GB8928318D0 (en) * | 1989-12-14 | 1990-02-21 | Unilever Plc | Polycarboxylate compounds and detergent compositions containing them |
| JP2719842B2 (ja) * | 1990-05-25 | 1998-02-25 | 信越化学工業株式会社 | 重合体スケールの付着防止方法および重合体スケール付着防止剤 |
| US5219930A (en) * | 1990-09-21 | 1993-06-15 | Quantum Chemical Corporation | Process for converting vinyl alcohol polymers to poly(keto-esters) therefrom |
| US5186978B1 (en) * | 1990-11-16 | 1999-11-02 | Cal West Equip Co | Protective coating and method of using such coating |
| US5302413A (en) * | 1990-11-16 | 1994-04-12 | Cal-West Equipment Company, Inc. | Protective coating and method of using such coating |
| US5750190B1 (en) * | 1990-11-16 | 2000-01-25 | Cal West Equipment Co Inc | Protective coating and method of using such coating |
| US5411760A (en) * | 1990-11-16 | 1995-05-02 | Cal-West Equipment Company, Inc. | Protective coating and method of using such coating |
| US5362786A (en) | 1990-11-16 | 1994-11-08 | Cal-West Equipment Co., Inc. | Protective coating and method of using such coating |
| US5494702A (en) * | 1994-06-21 | 1996-02-27 | Alco Industries, Inc. | Protective solvent free liquid masking compounds and related method |
| US5618578A (en) * | 1994-06-21 | 1997-04-08 | Alco Industries, Inc. | Protective solvent free liquid masking compounds and related method |
| US6162589A (en) * | 1998-03-02 | 2000-12-19 | Hewlett-Packard Company | Direct imaging polymer fluid jet orifice |
| AU2002247049A1 (en) * | 2001-02-01 | 2002-08-12 | Yale University | Osmotic desalination process |
| DE10140597A1 (de) * | 2001-08-18 | 2003-03-06 | Kuraray Specialities Europe | Teilvernetzter Polyvinylalkohol |
| EP1437369A1 (de) * | 2003-01-07 | 2004-07-14 | Clariant GmbH | Teilvernetzter Polyvinylalkohol |
| US20050020722A1 (en) * | 2003-05-30 | 2005-01-27 | Cal-West Specialty Coatings, Inc. | Protective masking solutions comprising thixotropic film formers |
| EP1781422B1 (en) * | 2004-06-14 | 2012-08-01 | Cal-West Specialty Coatings, Inc. | Masking solutions comprising siloxane-based surfactants for using in painting operations |
| US20070207269A1 (en) | 2004-06-14 | 2007-09-06 | Cal-West Specialty Coatings, Inc. | Masking solutions comprising siloxane-based surfactants for using in painting operations |
| US7571638B1 (en) * | 2005-05-10 | 2009-08-11 | Kley Victor B | Tool tips with scanning probe microscopy and/or atomic force microscopy applications |
| US9423693B1 (en) | 2005-05-10 | 2016-08-23 | Victor B. Kley | In-plane scanning probe microscopy tips and tools for wafers and substrates with diverse designs on one wafer or substrate |
| US7960695B1 (en) | 2005-05-13 | 2011-06-14 | Kley Victor B | Micromachined electron or ion-beam source and secondary pickup for scanning probe microscopy or object modification |
| TWI413649B (zh) * | 2006-04-12 | 2013-11-01 | Kuraray Co | 分散穩定劑 |
| US7784107B2 (en) * | 2006-06-02 | 2010-08-24 | Victor B. Kley | High speed measurement, analysis and imaging systems and methods for length scales from meter to sub-nanometer |
| DE102006047617B4 (de) | 2006-10-09 | 2008-11-27 | Clariant International Limited | Verfahren zur Herstellung basischer (Meth)acrylamide |
| DE102008017216B4 (de) | 2008-04-04 | 2013-08-14 | Clariant International Ltd. | Kontinuierliches Verfahren zur Herstellung von Fettsäureamiden |
| DE102009031059A1 (de) | 2009-06-30 | 2011-01-05 | Clariant International Ltd. | Vorrichtung zur kontinuierlichen Durchführung chemischer Reaktionen bei hohen Temperaturen |
| DE102009042522A1 (de) | 2009-09-22 | 2011-04-07 | Clariant International Ltd. | Kontinuierliches Umesterungsverfahren |
| DE102009042523B4 (de) | 2009-09-22 | 2012-02-16 | Clariant International Ltd. | Vorrichtung und Verfahren zur kontinuierlichen Durchführung heterogen katalysierter chemischer Reaktionen bei hohen Temperaturen |
| DE102010056565A1 (de) | 2010-12-30 | 2012-07-05 | Clariant International Ltd. | Verfahren zur Modifizierung Hydroxylgruppen tragender Polymere |
| DE102010056564A1 (de) * | 2010-12-30 | 2012-07-05 | Clariant International Limited | Hydroxylgruppen und Estergruppen tragende Polymere und Verfahren zu ihrer Herstellung |
| US9778572B1 (en) | 2013-03-15 | 2017-10-03 | Victor B. Kley | In-plane scanning probe microscopy tips and tools for wafers and substrates with diverse designs on one wafer or substrate |
| CN106621550B (zh) * | 2016-12-01 | 2019-12-06 | 中国石化长城能源化工（宁夏）有限公司 | 一种新的生产聚乙烯醇粉末的处理方法及其装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3050418A (en) * | 1959-11-09 | 1962-08-21 | Yardney International Corp | Process for imparting wettability to shaped hydrophobic polymeric material |
| US3220991A (en) * | 1962-03-28 | 1965-11-30 | Monsanto Co | Heat stabilization of polyvinyl alcohol with aliphatic polycarboxylic acid |
| US4007320A (en) * | 1974-05-21 | 1977-02-08 | Kemanord Aktiebolag | Process for reducing polymer build-up |
| TR18667A (tr) * | 1974-12-10 | 1977-06-23 | Anic Spa | Vinil - kloridin suespansiyon polimerizasyonu icin usul |
| LU75733A1 (cs) * | 1976-09-06 | 1978-04-27 | ||
| DE2845569A1 (de) * | 1978-10-19 | 1980-04-30 | Wacker Chemie Gmbh | Verfahren zur herstellung von vinylhalogenidhomo- und -copolymerisaten |
-
1981
- 1981-03-13 IT IT20344/81A patent/IT1137506B/it active
-
1982
- 1982-02-24 ZA ZA821222A patent/ZA821222B/xx unknown
- 1982-03-01 US US06/353,260 patent/US4456731A/en not_active Expired - Lifetime
- 1982-03-08 CA CA000397849A patent/CA1171595A/en not_active Expired
- 1982-03-08 MX MX191696A patent/MX159747A/es unknown
- 1982-03-09 JP JP57035971A patent/JPS57162703A/ja active Granted
- 1982-03-09 YU YU506/82A patent/YU44335B/xx unknown
- 1982-03-09 ES ES510890A patent/ES510890A0/es active Granted
- 1982-03-09 DK DK101382A patent/DK155833C/da not_active IP Right Cessation
- 1982-03-09 BR BR8201252A patent/BR8201252A/pt unknown
- 1982-03-09 NO NO820739A patent/NO158064C/no unknown
- 1982-03-09 GB GB8206849A patent/GB2094806B/en not_active Expired
- 1982-03-10 AT AT0095482A patent/AT384429B/de not_active IP Right Cessation
- 1982-03-10 LU LU83996A patent/LU83996A1/fr unknown
- 1982-03-10 FR FR8204041A patent/FR2501702A1/fr active Granted
- 1982-03-11 PT PT74564A patent/PT74564B/pt unknown
- 1982-03-12 CH CH1561/82A patent/CH652141A5/it not_active IP Right Cessation
- 1982-03-12 BE BE0/207554A patent/BE892474A/fr not_active IP Right Cessation
- 1982-03-12 DE DE19823209124 patent/DE3209124A1/de not_active Withdrawn
- 1982-03-12 NL NLAANVRAGE8201029,A patent/NL188167C/xx not_active IP Right Cessation
- 1982-03-12 AR AR288734A patent/AR228178A1/es active
- 1982-03-12 SE SE8201570A patent/SE448997B/sv not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR8201252A (pt) | 1983-01-18 |
| AR228178A1 (es) | 1983-01-31 |
| DK155833B (da) | 1989-05-22 |
| MX159747A (es) | 1989-08-16 |
| CH652141A5 (it) | 1985-10-31 |
| BE892474A (fr) | 1982-09-13 |
| ATA95482A (de) | 1987-04-15 |
| IT8120344A0 (it) | 1981-03-13 |
| NL188167C (nl) | 1992-04-16 |
| NO820739L (no) | 1982-09-14 |
| SE8201570L (sv) | 1982-09-14 |
| NO158064C (no) | 1988-07-06 |
| YU44335B (en) | 1990-06-30 |
| CA1171595A (en) | 1984-07-24 |
| YU50682A (en) | 1985-06-30 |
| PT74564B (en) | 1984-11-27 |
| FR2501702B1 (cs) | 1984-06-15 |
| ZA821222B (en) | 1983-01-26 |
| DK155833C (da) | 1989-10-09 |
| US4456731A (en) | 1984-06-26 |
| GB2094806B (en) | 1985-07-17 |
| NL188167B (nl) | 1991-11-18 |
| NO158064B (no) | 1988-03-28 |
| JPH0315641B2 (cs) | 1991-03-01 |
| ES8307303A1 (es) | 1983-07-01 |
| IT1137506B (it) | 1986-09-10 |
| AT384429B (de) | 1987-11-10 |
| NL8201029A (nl) | 1982-10-01 |
| PT74564A (en) | 1982-04-01 |
| FR2501702A1 (fr) | 1982-09-17 |
| JPS57162703A (en) | 1982-10-06 |
| ES510890A0 (es) | 1983-07-01 |
| LU83996A1 (fr) | 1983-02-22 |
| DK101382A (da) | 1982-09-14 |
| DE3209124A1 (de) | 1982-09-23 |
| GB2094806A (en) | 1982-09-22 |
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