CA1081396A - Process for the after-treatment of paste-forming polyvinyl chloride powders - Google Patents
Process for the after-treatment of paste-forming polyvinyl chloride powdersInfo
- Publication number
- CA1081396A CA1081396A CA261,098A CA261098A CA1081396A CA 1081396 A CA1081396 A CA 1081396A CA 261098 A CA261098 A CA 261098A CA 1081396 A CA1081396 A CA 1081396A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- acid
- generates
- aqueous solution
- powder
- 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
Links
- 239000000843 powder Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 24
- 229920000915 polyvinyl chloride Polymers 0.000 title description 2
- 239000004800 polyvinyl chloride Substances 0.000 title description 2
- 239000007789 gas Substances 0.000 claims abstract description 37
- 239000002253 acid Substances 0.000 claims abstract description 27
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 26
- 229920003023 plastic Polymers 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 22
- 229920000642 polymer Polymers 0.000 claims abstract description 21
- 239000007864 aqueous solution Substances 0.000 claims abstract description 20
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001694 spray drying Methods 0.000 claims abstract description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 10
- -1 alkali metal salt Chemical class 0.000 claims abstract description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 10
- 239000000194 fatty acid Substances 0.000 claims abstract description 10
- 229930195729 fatty acid Natural products 0.000 claims abstract description 10
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 239000011261 inert gas Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000839 emulsion Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 239000006185 dispersion Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 6
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 4
- 229940082004 sodium laurate Drugs 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 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
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 235000019394 potassium persulphate Nutrition 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229940045845 sodium myristate Drugs 0.000 description 2
- JUQGWKYSEXPRGL-UHFFFAOYSA-M sodium;tetradecanoate Chemical compound [Na+].CCCCCCCCCCCCCC([O-])=O JUQGWKYSEXPRGL-UHFFFAOYSA-M 0.000 description 2
- 239000003381 stabilizer Substances 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
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- GRYSXUXXBDSYRT-WOUKDFQISA-N (2r,3r,4r,5r)-2-(hydroxymethyl)-4-methoxy-5-[6-(methylamino)purin-9-yl]oxolan-3-ol Chemical compound C1=NC=2C(NC)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1OC GRYSXUXXBDSYRT-WOUKDFQISA-N 0.000 description 1
- KAKVFSYQVNHFBS-UHFFFAOYSA-N (5-hydroxycyclopenten-1-yl)-phenylmethanone Chemical compound OC1CCC=C1C(=O)C1=CC=CC=C1 KAKVFSYQVNHFBS-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- 229910002567 K2S2O8 Inorganic materials 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 229920001944 Plastisol Polymers 0.000 description 1
- 239000004159 Potassium persulphate Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 238000006887 Ullmann reaction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical compound OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- GFJVXXWOPWLRNU-UHFFFAOYSA-N ethenyl formate Chemical compound C=COC=O GFJVXXWOPWLRNU-UHFFFAOYSA-N 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229940070765 laurate Drugs 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
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000004999 plastisol Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 229940114930 potassium stearate Drugs 0.000 description 1
- QDIGBJJRWUZARS-UHFFFAOYSA-M potassium;decanoate Chemical compound [K+].CCCCCCCCCC([O-])=O QDIGBJJRWUZARS-UHFFFAOYSA-M 0.000 description 1
- MQOCIYICOGDBSG-UHFFFAOYSA-M potassium;hexadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCC([O-])=O MQOCIYICOGDBSG-UHFFFAOYSA-M 0.000 description 1
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 description 1
- PYJBVGYZXWPIKK-UHFFFAOYSA-M potassium;tetradecanoate Chemical compound [K+].CCCCCCCCCCCCCC([O-])=O PYJBVGYZXWPIKK-UHFFFAOYSA-M 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 229940045870 sodium palmitate Drugs 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- FIWQZURFGYXCEO-UHFFFAOYSA-M sodium;decanoate Chemical compound [Na+].CCCCCCCCCC([O-])=O FIWQZURFGYXCEO-UHFFFAOYSA-M 0.000 description 1
- GGXKEBACDBNFAF-UHFFFAOYSA-M sodium;hexadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCC([O-])=O GGXKEBACDBNFAF-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or 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; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or 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; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or 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; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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)
- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2541008A DE2541008C3 (de) | 1975-09-13 | 1975-09-13 | Verfahren zur Nachbehandlung von verpastbaren Polymerisaten des Vinylchlorids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081396A true CA1081396A (en) | 1980-07-08 |
Family
ID=5956472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA261,098A Expired CA1081396A (en) | 1975-09-13 | 1976-09-13 | Process for the after-treatment of paste-forming polyvinyl chloride powders |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4115640A (en, 2012) |
| JP (1) | JPS5235285A (en, 2012) |
| BE (1) | BE846115A (en, 2012) |
| CA (1) | CA1081396A (en, 2012) |
| CH (1) | CH602799A5 (en, 2012) |
| DE (1) | DE2541008C3 (en, 2012) |
| DK (1) | DK143805C (en, 2012) |
| FR (1) | FR2323722A1 (en, 2012) |
| GB (1) | GB1561275A (en, 2012) |
| IT (1) | IT1066291B (en, 2012) |
| NL (1) | NL7610101A (en, 2012) |
| NO (1) | NO763078L (en, 2012) |
| SE (1) | SE7610123L (en, 2012) |
| YU (1) | YU148276A (en, 2012) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575529A (en) * | 1978-09-15 | 1986-03-11 | The Dow Chemical Company | Dispersible vinylidene chloride polymer powders as additives for polymers |
| DE3009148A1 (de) * | 1980-03-10 | 1981-10-08 | Wacker-Chemie GmbH, 8000 München | Carboxylgruppenmodifiziertes vinylchlorid-emulsionspolymerisat, verfahren zu seiner herstellung und seine verwendung |
| DE3334667A1 (de) * | 1983-09-24 | 1985-04-11 | Hoechst Ag, 6230 Frankfurt | Verfahren zur herstellung und verwendung einer sinterfaehigen, feinteiligen formmasse auf basis polyvinylchlorid |
| KR102004734B1 (ko) | 2015-10-20 | 2019-07-29 | 주식회사 엘지화학 | 폴리염화비닐중합체의 제조방법 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2556260A (en) * | 1946-08-12 | 1951-06-12 | Celanese Corp | Process for coagulating polymer emulsions and recovering spherical particles |
| US3805869A (en) * | 1971-09-18 | 1974-04-23 | Huels Chemische Werke Ag | Apparatus for the preparation of emulsifier-containing polyvinyl chloride or vinyl chloride copolymer powders |
| DE2457667A1 (de) * | 1974-12-06 | 1976-06-10 | Hoechst Ag | Verfahren zur herstellung von vinylchloridpolymerisaten |
-
1975
- 1975-09-13 DE DE2541008A patent/DE2541008C3/de not_active Expired
-
1976
- 1976-06-16 YU YU01482/76A patent/YU148276A/xx unknown
- 1976-09-03 FR FR7626575A patent/FR2323722A1/fr active Granted
- 1976-09-08 NO NO763078A patent/NO763078L/no unknown
- 1976-09-10 CH CH1156976A patent/CH602799A5/xx not_active IP Right Cessation
- 1976-09-10 NL NL7610101A patent/NL7610101A/xx not_active Application Discontinuation
- 1976-09-10 BE BE170566A patent/BE846115A/xx unknown
- 1976-09-10 IT IT51209/76A patent/IT1066291B/it active
- 1976-09-10 DK DK408576A patent/DK143805C/da active
- 1976-09-10 GB GB37577/76A patent/GB1561275A/en not_active Expired
- 1976-09-13 SE SE7610123A patent/SE7610123L/xx not_active Application Discontinuation
- 1976-09-13 CA CA261,098A patent/CA1081396A/en not_active Expired
- 1976-09-13 JP JP51109725A patent/JPS5235285A/ja active Pending
- 1976-09-13 US US05/722,397 patent/US4115640A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH602799A5 (en, 2012) | 1978-08-15 |
| DK408576A (da) | 1977-03-14 |
| JPS5235285A (en) | 1977-03-17 |
| DK143805B (da) | 1981-10-12 |
| DE2541008B2 (de) | 1979-07-12 |
| YU148276A (en) | 1982-06-30 |
| FR2323722B1 (en, 2012) | 1981-03-27 |
| FR2323722A1 (fr) | 1977-04-08 |
| IT1066291B (it) | 1985-03-04 |
| DE2541008C3 (de) | 1980-03-20 |
| GB1561275A (en) | 1980-02-20 |
| DE2541008A1 (de) | 1977-03-17 |
| SE7610123L (sv) | 1977-03-14 |
| BE846115A (fr) | 1977-03-10 |
| NO763078L (en, 2012) | 1977-03-15 |
| US4115640A (en) | 1978-09-19 |
| NL7610101A (nl) | 1977-03-15 |
| DK143805C (da) | 1982-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |