DE2420305C2 - Gemischter Polyester und seine Verwendung als Zusatz zu Kohlenwasserstofftreibstoffen - Google Patents
Gemischter Polyester und seine Verwendung als Zusatz zu KohlenwasserstofftreibstoffenInfo
- Publication number
- DE2420305C2 DE2420305C2 DE2420305A DE2420305A DE2420305C2 DE 2420305 C2 DE2420305 C2 DE 2420305C2 DE 2420305 A DE2420305 A DE 2420305A DE 2420305 A DE2420305 A DE 2420305A DE 2420305 C2 DE2420305 C2 DE 2420305C2
- Authority
- DE
- Germany
- Prior art keywords
- alcohol
- test
- linoleic acid
- additive
- trimeric
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/143—Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/198—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- 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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid
- C10L1/1985—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- 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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid polyethers, e.g. di- polygylcols and derivatives; ethers - esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/2222—(cyclo)aliphatic amines; polyamines (no macromolecular substituent 30C); quaternair ammonium compounds; carbamates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/286—Esters of polymerised unsaturated acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/26—Amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/12—Gas-turbines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/12—Gas-turbines
- C10N2040/13—Aircraft turbines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/135—Steam engines or turbines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Liquid Carbonaceous Fuels (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyesters Or Polycarbonates (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Description
I, Motorprüfverfahren
Testcyclus
Aromatengehalt | 30,2% |
Olefine | 11,6% |
Gesättigte | 58,2% |
Blei | 0,008 Liter |
Schwefel | 0,009 Gew. |
API Schwere*) | 57,9 |
»Reed« Dampfdruck | 8,1 |
Forschungs-Oktatizaht | 91,7 |
Motor-Oktanzahl | 83,8 |
Anfangs Kp | 34,4°C |
50% destilliert | 108,9" C |
90% destilliert | 177,2°C |
Destillations-Endpunkt | 219.9" C |
Phase I | 650 Motor UpM, |
8 Minuten | |
Phase II | 3000 Motor UpM |
1 Minute | |
Testdauer, h | 10 |
Ansaugluft, 0C | 57 ±5 |
Kühlwasser, 0C | 88±5 |
Motor-ölsumpf,°C | 99±5 |
% CO im Abgas | 3»0±0,2 |
Kreisgas, Liter/sek | 0,70 -0,82 |
Die Prüfungen wurden wie folgt durchgeführt:
anfangs
10%
50%
90%
Endpunkt
% Rückstand
% Verlust
% Schwefel
Blei, g/Liter
Aromaten, %
Olefine, %
Gesättigte, %
1
1
20,0
56,9
Oxidationssteaüität, Minuten | 600 + |
ASTM Glimmen (ungewaschen), | |
mg/100 ml | 1,0 |
Forschungsoktanzahl | 95,5 |
%H | 13,10 |
%C | 86,61 |
WC | 1,80 |
AT1) mg Ablagerung (Ventil und Schlitz) |
VT2) mg Ablagerung |
365 | 13 |
170 | |
72 | |
35 | 18,1 |
37 | 14,2 |
475 | |
435 | 4,0 |
1247 | 3,3 |
Claims (3)
- Patentansprüche;
!.Gemischter Polyester der allgemeinen FormelC-O(CH2CH2O),[CO2R9],in derR7 ein Alkylrest mit 8 oder 9 Kohlenstoffatomen ist,R9 ein geradkettiger oder verzweigter Alkylrest mit 1 bis 24 Kohlenstoffatomen istZi ein gesättigter oder ungesättigter Kohlenwasserstoffrest der trimeren Linolsäure istπ einen Wert von 1 bis 20, bevorzugt 1 bis 4, hat undρ 1 oder 2 ist undq 1 oder 2 ist wobei die Summe von ρ und q 3 ist - 2. Gemischter Polyester nach Anspruch 1, dadurch gekennzeichnet daß er der Diisodecyl-monooctylphenoxypolyäthoxyäthanolester mit im Mittel 3 Mol angelagertem Äthylenoxid der trimeren Linolsäure ist
- 3. Verwendung der gemischten Polyester nach Anspruch 1 oder 2 als Zusatz in einer Menge von 100 bis 650 ppm zu Kohlenwasserstofftreibstoffen, die im Benzinbereich sieden.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00356655A US3846089A (en) | 1972-08-11 | 1973-05-02 | Motor fuel composition |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2420305A1 DE2420305A1 (de) | 1974-11-14 |
DE2420305C2 true DE2420305C2 (de) | 1983-01-27 |
Family
ID=23402362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2420305A Expired DE2420305C2 (de) | 1973-05-02 | 1974-04-26 | Gemischter Polyester und seine Verwendung als Zusatz zu Kohlenwasserstofftreibstoffen |
Country Status (12)
Country | Link |
---|---|
JP (1) | JPS585230B2 (de) |
BE (1) | BE813498A (de) |
CA (1) | CA1039302A (de) |
DE (1) | DE2420305C2 (de) |
ES (1) | ES426168A1 (de) |
FR (1) | FR2228103B1 (de) |
GB (4) | GB1476381A (de) |
IL (4) | IL44736A (de) |
IT (1) | IT1011817B (de) |
NL (1) | NL177017C (de) |
SE (4) | SE402467B (de) |
ZA (1) | ZA742604B (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2555920C2 (de) * | 1974-12-24 | 1983-12-15 | Rohm and Haas Co., 19105 Philadelphia, Pa. | Mehrzweckzusatz für Benzin und eine ihn enthaltende Kraftstoffmischung |
DE2555922C2 (de) * | 1974-12-24 | 1984-09-20 | Rohm And Haas Co., Philadelphia, Pa. | Mehrzweckzusatzmischung für Benzin |
DE2645713C2 (de) * | 1976-10-09 | 1982-11-18 | Basf Ag, 6700 Ludwigshafen | Treibstoffe für Ottomotoren |
GB2009147B (en) * | 1977-11-30 | 1982-05-06 | Ici Ltd | Polyvinylchloride compositions and ingredients therefor |
JPS5943940A (ja) * | 1982-09-03 | 1984-03-12 | Komatsu Ltd | 油圧駆動車のエンジンオ−バ−回転防止装置 |
US8177076B2 (en) | 2006-02-16 | 2012-05-15 | Fasteners For Retail, Inc. | Merchandising system |
-
1974
- 1974-04-01 CA CA196,530A patent/CA1039302A/en not_active Expired
- 1974-04-09 BE BE143012A patent/BE813498A/xx not_active IP Right Cessation
- 1974-04-24 ZA ZA00742604A patent/ZA742604B/xx unknown
- 1974-04-26 GB GB1842374A patent/GB1476381A/en not_active Expired
- 1974-04-26 DE DE2420305A patent/DE2420305C2/de not_active Expired
- 1974-04-26 GB GB5080676A patent/GB1476383A/en not_active Expired
- 1974-04-26 GB GB5080576A patent/GB1476382A/en not_active Expired
- 1974-04-26 GB GB5080776A patent/GB1476384A/en not_active Expired
- 1974-04-26 SE SE7405689A patent/SE402467B/xx not_active IP Right Cessation
- 1974-04-30 IL IL44736A patent/IL44736A/xx unknown
- 1974-04-30 FR FR7415095A patent/FR2228103B1/fr not_active Expired
- 1974-04-30 IT IT68355/74A patent/IT1011817B/it active
- 1974-04-30 JP JP49048620A patent/JPS585230B2/ja not_active Expired
- 1974-05-02 NL NLAANVRAGE7405930,A patent/NL177017C/xx not_active IP Right Cessation
- 1974-05-02 ES ES426168A patent/ES426168A1/es not_active Expired
-
1977
- 1977-03-28 IL IL51752A patent/IL51752A0/xx unknown
- 1977-03-28 IL IL51754A patent/IL51754A0/xx unknown
- 1977-03-28 IL IL51753A patent/IL51753A0/xx unknown
- 1977-05-16 SE SE7705732A patent/SE412250B/xx not_active IP Right Cessation
- 1977-05-16 SE SE7705731A patent/SE412251B/xx not_active IP Right Cessation
- 1977-05-16 SE SE7705733A patent/SE412411B/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB1476384A (en) | 1977-06-10 |
GB1476381A (en) | 1977-06-10 |
GB1476382A (en) | 1977-06-10 |
SE7705731L (sv) | 1977-05-16 |
SE412411B (sv) | 1980-03-03 |
JPS585230B2 (ja) | 1983-01-29 |
BE813498A (fr) | 1974-10-09 |
DE2420305A1 (de) | 1974-11-14 |
FR2228103A1 (de) | 1974-11-29 |
SE402467B (sv) | 1978-07-03 |
GB1476383A (en) | 1977-06-10 |
FR2228103B1 (de) | 1978-03-31 |
NL7405930A (de) | 1974-11-05 |
SE7705733L (sv) | 1977-05-16 |
IL51752A0 (en) | 1977-05-31 |
IL51753A0 (en) | 1977-05-31 |
IL44736A (en) | 1978-12-17 |
AU6847274A (en) | 1975-11-06 |
IT1011817B (it) | 1977-02-10 |
SE412250B (sv) | 1980-02-25 |
CA1039302A (en) | 1978-09-26 |
JPS5014705A (de) | 1975-02-17 |
NL177017B (nl) | 1985-02-18 |
IL51754A0 (en) | 1977-05-31 |
SE412251B (sv) | 1980-02-25 |
NL177017C (nl) | 1985-07-16 |
SE7705732L (sv) | 1977-05-16 |
IL44736A0 (en) | 1974-06-30 |
ES426168A1 (es) | 1976-11-01 |
ZA742604B (en) | 1975-05-28 |
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