DE3223796A1 - Verfahren zum behandeln eines polymerisationsreaktors und mittel hierfuer - Google Patents
Verfahren zum behandeln eines polymerisationsreaktors und mittel hierfuerInfo
- Publication number
- DE3223796A1 DE3223796A1 DE19823223796 DE3223796A DE3223796A1 DE 3223796 A1 DE3223796 A1 DE 3223796A1 DE 19823223796 DE19823223796 DE 19823223796 DE 3223796 A DE3223796 A DE 3223796A DE 3223796 A1 DE3223796 A1 DE 3223796A1
- Authority
- DE
- Germany
- Prior art keywords
- reactor
- polymerization
- coating solution
- inner surfaces
- coating
- 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
- 238000006116 polymerization reaction Methods 0.000 title claims description 54
- 238000000034 method Methods 0.000 title claims description 27
- 239000011248 coating agent Substances 0.000 claims description 47
- 238000000576 coating method Methods 0.000 claims description 47
- 239000000243 solution Substances 0.000 claims description 47
- 239000011347 resin Substances 0.000 claims description 32
- 229920005989 resin Polymers 0.000 claims description 32
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 18
- 241000018646 Pinus brutia Species 0.000 claims description 18
- 235000011613 Pinus brutia Nutrition 0.000 claims description 18
- 239000002023 wood Substances 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 5
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 claims description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 claims description 2
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 description 28
- 238000003756 stirring Methods 0.000 description 22
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 18
- 239000000178 monomer Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 description 8
- 239000012429 reaction media Substances 0.000 description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 5
- PGOVCMQQKSNPOT-UHFFFAOYSA-N carboxyoxy cyclohexyl carbonate Chemical compound OC(=O)OOC(=O)OC1CCCCC1 PGOVCMQQKSNPOT-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- -1 Vinyl halides Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 2
- 241000218657 Picea Species 0.000 description 2
- 241000220317 Rosa Species 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 239000000908 ammonium hydroxide Substances 0.000 description 2
- 239000007900 aqueous suspension Substances 0.000 description 2
- 238000012662 bulk polymerization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 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
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 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
- C08F14/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F14/02—Monomers containing chlorine
- C08F14/04—Monomers containing two carbon atoms
- C08F14/06—Vinyl chloride
-
- 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
- C08F2/00—Processes of polymerisation
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)
- Polymerisation Methods In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8205143A FR2523979A1 (fr) | 1982-03-26 | 1982-03-26 | Procede de traitement d'un reacteur de polymerisation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3223796A1 true DE3223796A1 (de) | 1983-09-29 |
| DE3223796C2 DE3223796C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-12-17 |
Family
ID=9272412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19823223796 Granted DE3223796A1 (de) | 1982-03-26 | 1982-06-25 | Verfahren zum behandeln eines polymerisationsreaktors und mittel hierfuer |
Country Status (12)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3317965A1 (de) * | 1982-05-19 | 1983-11-24 | Chloé Chimie, 92800 Puteaux | Verfahren zum behandeln eines polymerisationsreaktors |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680349A (en) * | 1985-01-14 | 1987-07-14 | Toyo Soda Manufacturing Co., Ltd. | Method of polymerizing vinyl monomers with coated reactor |
| IT1235098B (it) * | 1989-06-15 | 1992-06-18 | Francesco Carlin | Procedimento per la produzione in emulsione acquosa di miscele di alcoli polivinilici e prodotti cosi' ottenuti. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2193026A (en) * | 1936-01-31 | 1940-03-12 | Hercules Powder Co Ltd | Resin and process of producing |
| DE2357869A1 (de) * | 1972-11-20 | 1974-05-30 | Ici Ltd | Verfahren zur herstellung von vinylchloridpolymeren |
| DE2460260A1 (de) * | 1974-03-13 | 1975-10-02 | Kureha Chemical Ind Co Ltd | Verfahren zur suspensionspolymerisation und druck-polymerisationsbehaelter zu seiner durchfuehrung |
| DE3109052A1 (de) * | 1980-03-10 | 1982-01-28 | Kureha Kagaku Kogyo K.K., Tokyo | Suspensionspolymerisation von halogenaethylen-verbindungen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1942531A (en) * | 1930-06-03 | 1934-01-09 | Du Pont | Low viscosity vinyl polymer |
| US3778423A (en) * | 1971-06-28 | 1973-12-11 | Universal Pvc Resins | Method for reducing polymer deposit in polymerization of vinyl chloride |
| US4093787A (en) * | 1972-11-20 | 1978-06-06 | Imperial Chemical Industries Limited | Vinyl chloride polymerization process |
| US4024330A (en) * | 1975-04-08 | 1977-05-17 | The B. F. Goodrich Company | Internally coated reaction vessel and process for coating the same |
| JPS5521436A (en) * | 1978-08-01 | 1980-02-15 | Nippon Zeon Co Ltd | Manufacture of vinyl chloride polymer |
| US4182809A (en) * | 1978-09-05 | 1980-01-08 | The B. F. Goodrich Company | Inversion polymerization process for producing vinyl resins using a dual layer coating |
-
1982
- 1982-03-26 FR FR8205143A patent/FR2523979A1/fr active Granted
- 1982-06-08 AU AU84659/82A patent/AU551679B2/en not_active Ceased
- 1982-06-14 US US06/387,923 patent/US4585842A/en not_active Expired - Fee Related
- 1982-06-16 CA CA000405313A patent/CA1194680A/en not_active Expired
- 1982-06-23 IT IT48697/82A patent/IT1157215B/it active
- 1982-06-24 GB GB08218247A patent/GB2117272B/en not_active Expired
- 1982-06-25 JP JP57108609A patent/JPS6022003B2/ja not_active Expired
- 1982-06-25 ES ES513468A patent/ES513468A0/es active Granted
- 1982-06-25 BE BE0/208457A patent/BE893658A/fr not_active IP Right Cessation
- 1982-06-25 DE DE19823223796 patent/DE3223796A1/de active Granted
- 1982-06-25 ZA ZA824533A patent/ZA824533B/xx unknown
- 1982-06-26 KR KR8202861A patent/KR890002697B1/ko not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2193026A (en) * | 1936-01-31 | 1940-03-12 | Hercules Powder Co Ltd | Resin and process of producing |
| DE2357869A1 (de) * | 1972-11-20 | 1974-05-30 | Ici Ltd | Verfahren zur herstellung von vinylchloridpolymeren |
| DE2460260A1 (de) * | 1974-03-13 | 1975-10-02 | Kureha Chemical Ind Co Ltd | Verfahren zur suspensionspolymerisation und druck-polymerisationsbehaelter zu seiner durchfuehrung |
| DE3109052A1 (de) * | 1980-03-10 | 1982-01-28 | Kureha Kagaku Kogyo K.K., Tokyo | Suspensionspolymerisation von halogenaethylen-verbindungen |
Non-Patent Citations (2)
| Title |
|---|
| Central Patents Index, 1973, Ref. 49437 U-A * |
| Central Patents Index, 1974, Ref. 38911 V/21 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3317965A1 (de) * | 1982-05-19 | 1983-11-24 | Chloé Chimie, 92800 Puteaux | Verfahren zum behandeln eines polymerisationsreaktors |
Also Published As
| Publication number | Publication date |
|---|---|
| ES8500288A1 (es) | 1984-10-01 |
| BE893658A (fr) | 1982-12-27 |
| FR2523979B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1984-05-11 |
| AU551679B2 (en) | 1986-05-08 |
| GB2117272A (en) | 1983-10-12 |
| ZA824533B (en) | 1983-04-27 |
| ES513468A0 (es) | 1984-10-01 |
| KR890002697B1 (ko) | 1989-07-24 |
| AU8465982A (en) | 1983-09-29 |
| CA1194680A (en) | 1985-10-08 |
| FR2523979A1 (fr) | 1983-09-30 |
| IT8248697A0 (it) | 1982-06-23 |
| DE3223796C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1987-12-17 |
| IT1157215B (it) | 1987-02-11 |
| JPS58168601A (ja) | 1983-10-05 |
| US4585842A (en) | 1986-04-29 |
| JPS6022003B2 (ja) | 1985-05-30 |
| GB2117272B (en) | 1985-07-03 |
| KR840000584A (ko) | 1984-02-25 |
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