DE2156264A1 - Stoßdämpfer auf der Grundlage von Polyurethanen - Google Patents
Stoßdämpfer auf der Grundlage von PolyurethanenInfo
- Publication number
- DE2156264A1 DE2156264A1 DE19712156264 DE2156264A DE2156264A1 DE 2156264 A1 DE2156264 A1 DE 2156264A1 DE 19712156264 DE19712156264 DE 19712156264 DE 2156264 A DE2156264 A DE 2156264A DE 2156264 A1 DE2156264 A1 DE 2156264A1
- Authority
- DE
- Germany
- Prior art keywords
- molecular weight
- polyester
- glycols
- polyols
- carbon atoms
- 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.)
- Pending
Links
- 230000035939 shock Effects 0.000 title claims description 56
- 239000004814 polyurethane Substances 0.000 title claims description 52
- 229920002635 polyurethane Polymers 0.000 title claims description 52
- 239000006096 absorbing agent Substances 0.000 title claims description 38
- 239000000203 mixture Substances 0.000 claims description 56
- 239000000872 buffer Substances 0.000 claims description 41
- 229920005906 polyester polyol Polymers 0.000 claims description 35
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 33
- 229920005862 polyol Polymers 0.000 claims description 32
- 229920000728 polyester Polymers 0.000 claims description 31
- 150000003077 polyols Chemical class 0.000 claims description 31
- 125000004432 carbon atom Chemical group C* 0.000 claims description 28
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical class OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 27
- -1 aliphatic hydrocarbon diols Chemical class 0.000 claims description 24
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 24
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims description 24
- 150000002334 glycols Chemical class 0.000 claims description 20
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 18
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 17
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 16
- 125000005442 diisocyanate group Chemical group 0.000 claims description 16
- 229920000570 polyether Polymers 0.000 claims description 16
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 14
- 239000011541 reaction mixture Substances 0.000 claims description 14
- 229940067597 azelate Drugs 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 10
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 10
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 10
- 150000004985 diamines Chemical class 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- GPCIDUIBGGUBJG-UHFFFAOYSA-N hexanedioic acid;hexane-1,1-diol Chemical compound CCCCCC(O)O.OC(=O)CCCCC(O)=O GPCIDUIBGGUBJG-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 5
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 5
- 238000012669 compression test Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229920005903 polyol mixture Polymers 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 4
- IFVTZJHWGZSXFD-UHFFFAOYSA-N biphenylene Chemical group C1=CC=C2C3=CC=CC=C3C2=C1 IFVTZJHWGZSXFD-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims 7
- 239000001361 adipic acid Substances 0.000 claims 7
- 150000003141 primary amines Chemical group 0.000 claims 3
- 239000005977 Ethylene Substances 0.000 claims 1
- 125000003277 amino group Chemical group 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000006378 damage Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 claims 1
- 239000003963 antioxidant agent Substances 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 4
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- WPEOOEIAIFABQP-UHFFFAOYSA-N hexanedioic acid;hexane-1,6-diol Chemical compound OCCCCCCO.OC(=O)CCCCC(O)=O WPEOOEIAIFABQP-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- HVCNXQOWACZAFN-UHFFFAOYSA-N 4-ethylmorpholine Chemical compound CCN1CCOCC1 HVCNXQOWACZAFN-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000000378 dietary effect Effects 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- SXCBDZAEHILGLM-UHFFFAOYSA-N heptane-1,7-diol Chemical compound OCCCCCCCO SXCBDZAEHILGLM-UHFFFAOYSA-N 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/37—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers of foam-like material, i.e. microcellular material, e.g. sponge rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Springs (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93326A US3677869A (en) | 1970-11-27 | 1970-11-27 | Polyureaurethane shock absorbing compositions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2156264A1 true DE2156264A1 (de) | 1972-06-08 |
Family
ID=22238321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19712156264 Pending DE2156264A1 (de) | 1970-11-27 | 1971-11-09 | Stoßdämpfer auf der Grundlage von Polyurethanen |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US3677869A (enExample) |
| AT (1) | AT319602B (enExample) |
| AU (1) | AU449302B2 (enExample) |
| BE (1) | BE775933A (enExample) |
| BR (1) | BR7107452D0 (enExample) |
| CA (1) | CA968899A (enExample) |
| CH (1) | CH555988A (enExample) |
| DE (1) | DE2156264A1 (enExample) |
| ES (1) | ES397178A1 (enExample) |
| FR (1) | FR2115399B1 (enExample) |
| GB (1) | GB1377096A (enExample) |
| IE (1) | IE36031B1 (enExample) |
| LU (1) | LU64355A1 (enExample) |
| NL (1) | NL7116296A (enExample) |
| NO (1) | NO132434C (enExample) |
| PL (2) | PL72350B1 (enExample) |
| SE (3) | SE385306B (enExample) |
| TR (1) | TR16963A (enExample) |
| ZA (1) | ZA717490B (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2435078A1 (de) * | 1973-08-08 | 1975-02-20 | Goodyear Tire & Rubber | Stossdaempfungseinheit |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7215206U (de) * | 1972-04-21 | 1972-07-20 | Krupp F Gmbh | Endanschlag fuer eine schiebetuer |
| US3929729A (en) * | 1974-11-21 | 1975-12-30 | Goodyear Tire & Rubber | Polyureaurethane shock absorbing unit |
| GB1502279A (en) * | 1974-12-03 | 1978-03-01 | Mazel Plastic Systems Ltd | Crushing material reducing grinding and like machines |
| US3961813A (en) * | 1975-03-25 | 1976-06-08 | Southwire Company | Trailer hitch |
| US4073858A (en) * | 1975-04-07 | 1978-02-14 | The Goodyear Tire & Rubber Company | Shock absorbing unit molded from polyurethane (urea) rubber composition |
| CA1111996A (en) * | 1978-09-20 | 1981-11-03 | Som N. Khanna | Semi-flexible shock-absorbing polyurethane foam |
| FR2661628B1 (fr) * | 1990-05-02 | 1992-07-17 | Techmetal Promotion | Piece mecanique elancee, notamment destinee a travailler en compression selon sa direction longitudinale. |
| US5046593A (en) * | 1990-07-31 | 1991-09-10 | Eaton Corporation | Coupling assembly |
| US5092567A (en) * | 1991-02-20 | 1992-03-03 | John Wang | Pressure actuated assembly |
| US5112933A (en) * | 1991-04-16 | 1992-05-12 | Otis Elevator Company | Ether-based polyurethane elevator sheave liner-polyurethane-urea made from polyether urethane prepolymer chain extended with polyester/diamine blend |
| US7044457B2 (en) | 2001-11-05 | 2006-05-16 | Lord Corporation | Mount with replaceable load bearing and rebound members |
| US8206791B2 (en) * | 2007-05-15 | 2012-06-26 | Texas Research International, Inc. | Protective coatings for high strength steels |
| CA2662982A1 (en) * | 2009-04-17 | 2010-10-17 | Crosslink Technology Inc. | Liquid aromatic amines and uses thereof in gas impermeable coatings |
-
1970
- 1970-11-27 US US93326A patent/US3677869A/en not_active Expired - Lifetime
-
1971
- 1971-11-03 AU AU35299/71A patent/AU449302B2/en not_active Expired
- 1971-11-03 AT AT947871A patent/AT319602B/de not_active IP Right Cessation
- 1971-11-04 NO NO4077/71A patent/NO132434C/no unknown
- 1971-11-04 GB GB5132571A patent/GB1377096A/en not_active Expired
- 1971-11-05 CA CA126,943A patent/CA968899A/en not_active Expired
- 1971-11-08 ZA ZA717490A patent/ZA717490B/xx unknown
- 1971-11-09 DE DE19712156264 patent/DE2156264A1/de active Pending
- 1971-11-09 BR BR7452/71A patent/BR7107452D0/pt unknown
- 1971-11-11 TR TR16963A patent/TR16963A/xx unknown
- 1971-11-16 IE IE1447/71A patent/IE36031B1/xx unknown
- 1971-11-19 ES ES397178A patent/ES397178A1/es not_active Expired
- 1971-11-23 SE SE7114996A patent/SE385306B/xx unknown
- 1971-11-23 SE SE7409240A patent/SE385836B/xx unknown
- 1971-11-25 PL PL1971151759A patent/PL72350B1/xx unknown
- 1971-11-25 PL PL1971158474A patent/PL82792B1/pl unknown
- 1971-11-25 FR FR7142226A patent/FR2115399B1/fr not_active Expired
- 1971-11-26 NL NL7116296A patent/NL7116296A/xx unknown
- 1971-11-26 LU LU64355D patent/LU64355A1/xx unknown
- 1971-11-26 BE BE775933A patent/BE775933A/xx unknown
- 1971-11-29 CH CH1736071A patent/CH555988A/fr not_active IP Right Cessation
-
1974
- 1974-07-15 SE SE7409240A patent/SE7409240L/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2435078A1 (de) * | 1973-08-08 | 1975-02-20 | Goodyear Tire & Rubber | Stossdaempfungseinheit |
Also Published As
| Publication number | Publication date |
|---|---|
| CA968899A (en) | 1975-06-03 |
| BR7107452D0 (pt) | 1973-05-31 |
| TR16963A (tr) | 1974-01-19 |
| AU3529971A (en) | 1973-05-10 |
| IE36031L (en) | 1972-05-27 |
| FR2115399B1 (enExample) | 1974-04-05 |
| BE775933A (fr) | 1972-03-16 |
| ZA717490B (en) | 1972-07-26 |
| LU64355A1 (enExample) | 1972-06-19 |
| AT319602B (de) | 1974-12-27 |
| ES397178A1 (es) | 1975-03-16 |
| FR2115399A1 (enExample) | 1972-07-07 |
| NL7116296A (enExample) | 1972-05-30 |
| SE385306B (sv) | 1976-06-21 |
| GB1377096A (en) | 1974-12-11 |
| NO132434B (enExample) | 1975-08-04 |
| IE36031B1 (en) | 1976-08-04 |
| CH555988A (fr) | 1974-11-15 |
| AU449302B2 (en) | 1974-06-06 |
| US3677869A (en) | 1972-07-18 |
| SE385836B (sv) | 1976-07-26 |
| PL72350B1 (enExample) | 1974-06-29 |
| PL82792B1 (enExample) | 1975-10-31 |
| SE7409240L (sv) | 1974-07-15 |
| NO132434C (enExample) | 1975-11-12 |
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