CH632287A5 - Stabiliser combination for polymers in contact with copper - Google Patents
Stabiliser combination for polymers in contact with copper Download PDFInfo
- Publication number
- CH632287A5 CH632287A5 CH1526277A CH1526277A CH632287A5 CH 632287 A5 CH632287 A5 CH 632287A5 CH 1526277 A CH1526277 A CH 1526277A CH 1526277 A CH1526277 A CH 1526277A CH 632287 A5 CH632287 A5 CH 632287A5
- Authority
- CH
- Switzerland
- Prior art keywords
- weight
- deactivator
- stabilizer combination
- copper
- crosslinked
- Prior art date
Links
- 239000003381 stabilizer Substances 0.000 title claims description 42
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 24
- 229910052802 copper Inorganic materials 0.000 title claims description 24
- 239000010949 copper Substances 0.000 title claims description 24
- 229920000642 polymer Polymers 0.000 title claims description 17
- 239000003112 inhibitor Substances 0.000 claims description 31
- 230000003647 oxidation Effects 0.000 claims description 30
- 238000007254 oxidation reaction Methods 0.000 claims description 30
- 229920000098 polyolefin Polymers 0.000 claims description 11
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims description 9
- 229920001169 thermoplastic Polymers 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 claims description 7
- 238000011105 stabilization Methods 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 238000006731 degradation reaction Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 description 38
- -1 polyoxymethylenes Polymers 0.000 description 29
- 230000032683 aging Effects 0.000 description 25
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 24
- 239000000203 mixture Substances 0.000 description 21
- 239000004698 Polyethylene Substances 0.000 description 18
- 229920000573 polyethylene Polymers 0.000 description 18
- 239000004408 titanium dioxide Substances 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 11
- 238000009413 insulation Methods 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000010894 electron beam technology Methods 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- UORSDGBOJHYJLV-UHFFFAOYSA-N 2-hydroxy-n'-(2-hydroxybenzoyl)benzohydrazide Chemical compound OC1=CC=CC=C1C(=O)NNC(=O)C1=CC=CC=C1O UORSDGBOJHYJLV-UHFFFAOYSA-N 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000006078 metal deactivator Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- JXBCJUPBVRELNY-UHFFFAOYSA-N [7-(diethylamino)phenothiazin-3-ylidene]-diethylazanium Chemical compound C1=CC(N(CC)CC)=CC2=[S+]C3=CC(N(CC)CC)=CC=C3N=C21 JXBCJUPBVRELNY-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 230000000254 damaging effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005865 ionizing radiation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- VMRCVWCZLIPZLW-UHFFFAOYSA-N 2-hydroxy-4-methoxybenzohydrazide Chemical compound COC1=CC=C(C(=O)NN)C(O)=C1 VMRCVWCZLIPZLW-UHFFFAOYSA-N 0.000 description 1
- MAJOGFJWJDRJLS-UHFFFAOYSA-N 2-hydroxy-5-octoxybenzohydrazide Chemical compound CCCCCCCCOC1=CC=C(O)C(C(=O)NN)=C1 MAJOGFJWJDRJLS-UHFFFAOYSA-N 0.000 description 1
- OMCYEZUIYGPHDJ-UHFFFAOYSA-N 2-hydroxy-N-[(2-hydroxyphenyl)methylideneamino]benzamide Chemical compound OC1=CC=CC=C1C=NNC(=O)C1=CC=CC=C1O OMCYEZUIYGPHDJ-UHFFFAOYSA-N 0.000 description 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- UXKQNCDDHDBAPD-UHFFFAOYSA-N 4-n,4-n-diphenylbenzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UXKQNCDDHDBAPD-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- OUBMGJOQLXMSNT-UHFFFAOYSA-N N-isopropyl-N'-phenyl-p-phenylenediamine Chemical compound C1=CC(NC(C)C)=CC=C1NC1=CC=CC=C1 OUBMGJOQLXMSNT-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000006701 autoxidation reaction Methods 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- DECIPOUIJURFOJ-UHFFFAOYSA-N ethoxyquin Chemical compound N1C(C)(C)C=C(C)C2=CC(OCC)=CC=C21 DECIPOUIJURFOJ-UHFFFAOYSA-N 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000003365 glass fiber 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
- 238000010438 heat treatment Methods 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 125000005027 hydroxyaryl group Chemical group 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/22—Compounds containing nitrogen bound to another nitrogen atom
- C08K5/24—Derivatives of hydrazine
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2703558A DE2703558C3 (de) | 1977-01-28 | 1977-01-28 | Stabilisatorkombination für Polymere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH632287A5 true CH632287A5 (en) | 1982-09-30 |
Family
ID=5999813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1526277A CH632287A5 (en) | 1977-01-28 | 1977-12-13 | Stabiliser combination for polymers in contact with copper |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5396045A (sv) |
| AT (1) | AT364866B (sv) |
| BE (1) | BE863346A (sv) |
| CH (1) | CH632287A5 (sv) |
| DE (1) | DE2703558C3 (sv) |
| DK (1) | DK35578A (sv) |
| FR (1) | FR2378818A1 (sv) |
| GB (1) | GB1593902A (sv) |
| IN (1) | IN147588B (sv) |
| IT (1) | IT1093401B (sv) |
| NL (1) | NL7800119A (sv) |
| SE (1) | SE443986B (sv) |
| TR (1) | TR20320A (sv) |
| ZA (1) | ZA7886B (sv) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4624179A (en) * | 1978-05-22 | 1979-11-29 | B.F. Goodrich Company, The | Polymeric composition having enhanced resistance to photo- degradation |
| DE2933870A1 (de) * | 1979-08-21 | 1981-03-12 | Siemens AG, 1000 Berlin und 8000 München | N.n'-bis-salicyloyl-hydrazin als metalldesaktivator. |
| JPS5672036A (en) * | 1979-11-16 | 1981-06-16 | Hitachi Cable Ltd | Crosslinked polyethylene composition |
| DE3033383A1 (de) * | 1980-09-04 | 1982-04-29 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur herstellung von n.n'-bis-salicyloyl-hydrazin |
| DE3131221A1 (de) | 1981-08-06 | 1983-02-24 | Siemens AG, 1000 Berlin und 8000 München | "verfahren zur stabilisierung von organischen polymeren gegen oxidativen abbau" |
| DE3210859A1 (de) * | 1982-03-24 | 1983-09-29 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und vorrichtung zur herstellung von n.n'-bis-aroyl-hydrazinen |
| DE3318963A1 (de) * | 1983-05-25 | 1984-11-29 | Siemens AG, 1000 Berlin und 8000 München | Stabilisierung organischer polymermaterialien |
| DE3402883A1 (de) * | 1984-01-27 | 1985-08-01 | Siemens AG, 1000 Berlin und 8000 München | Leiterplatten aus schichtpressstoffen |
| US5502288A (en) * | 1994-03-30 | 1996-03-26 | Union Carbide Chemicals & Plastics Technology Corporation | Telephone cables |
| US20060116456A1 (en) * | 2004-11-30 | 2006-06-01 | Lin Thomas S | Composition with enhanced heat resistance property |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849492A (en) * | 1970-10-08 | 1974-11-19 | Ciba Geigy Corp | Bis-salicyloyl-hydrazines |
| DE2506105C3 (de) * | 1975-02-13 | 1981-05-27 | Siemens AG, 1000 Berlin und 8000 München | Radikalisch vernetzbare Polymersysteme |
-
1977
- 1977-01-28 DE DE2703558A patent/DE2703558C3/de not_active Expired
- 1977-12-13 CH CH1526277A patent/CH632287A5/de not_active IP Right Cessation
-
1978
- 1978-01-03 IN IN11/CAL/78A patent/IN147588B/en unknown
- 1978-01-04 NL NL7800119A patent/NL7800119A/xx not_active Application Discontinuation
- 1978-01-06 ZA ZA00780086A patent/ZA7886B/xx unknown
- 1978-01-11 SE SE7800308A patent/SE443986B/sv not_active IP Right Cessation
- 1978-01-13 TR TR20320A patent/TR20320A/xx unknown
- 1978-01-18 GB GB2107/78A patent/GB1593902A/en not_active Expired
- 1978-01-24 JP JP662578A patent/JPS5396045A/ja active Granted
- 1978-01-25 DK DK35578A patent/DK35578A/da not_active Application Discontinuation
- 1978-01-26 BE BE184653A patent/BE863346A/xx unknown
- 1978-01-26 IT IT19650/78A patent/IT1093401B/it active
- 1978-01-26 AT AT0056378A patent/AT364866B/de not_active IP Right Cessation
- 1978-01-26 FR FR7802207A patent/FR2378818A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2378818B1 (sv) | 1980-05-16 |
| NL7800119A (nl) | 1978-08-01 |
| DK35578A (da) | 1978-07-29 |
| JPS5396045A (en) | 1978-08-22 |
| GB1593902A (en) | 1981-07-22 |
| ATA56378A (de) | 1981-04-15 |
| FR2378818A1 (fr) | 1978-08-25 |
| TR20320A (tr) | 1981-02-11 |
| AT364866B (de) | 1981-11-25 |
| SE7800308L (sv) | 1978-07-29 |
| BE863346A (fr) | 1978-05-16 |
| ZA7886B (en) | 1978-11-29 |
| DE2703558C3 (de) | 1979-10-04 |
| JPS627933B2 (sv) | 1987-02-19 |
| SE443986B (sv) | 1986-03-17 |
| IT1093401B (it) | 1985-07-19 |
| DE2703558B2 (de) | 1979-02-08 |
| DE2703558A1 (de) | 1978-08-03 |
| IN147588B (sv) | 1980-04-26 |
| IT7819650A0 (it) | 1978-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |