DE2641249B2 - Lagerbeständiges Bindemittel zur Herstellung von Gießformen und - kernen - Google Patents
Lagerbeständiges Bindemittel zur Herstellung von Gießformen und - kernenInfo
- Publication number
- DE2641249B2 DE2641249B2 DE2641249A DE2641249A DE2641249B2 DE 2641249 B2 DE2641249 B2 DE 2641249B2 DE 2641249 A DE2641249 A DE 2641249A DE 2641249 A DE2641249 A DE 2641249A DE 2641249 B2 DE2641249 B2 DE 2641249B2
- Authority
- DE
- Germany
- Prior art keywords
- cores
- weight
- sand
- starch hydrolyzate
- binder
- 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.)
- Ceased
Links
- 239000011230 binding agent Substances 0.000 title claims description 35
- 238000005266 casting Methods 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920002472 Starch Polymers 0.000 claims description 34
- 235000019698 starch Nutrition 0.000 claims description 34
- 239000008107 starch Substances 0.000 claims description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 27
- 229920002245 Dextrose equivalent Polymers 0.000 claims description 18
- 239000006188 syrup Substances 0.000 claims description 13
- 235000020357 syrup Nutrition 0.000 claims description 13
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 28
- 239000004115 Sodium Silicate Substances 0.000 description 26
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 24
- 229910052911 sodium silicate Inorganic materials 0.000 description 24
- 239000004576 sand Substances 0.000 description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 239000000654 additive Substances 0.000 description 9
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 8
- 229930006000 Sucrose Natural products 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 229960004793 sucrose Drugs 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 6
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 235000000346 sugar Nutrition 0.000 description 6
- 239000011734 sodium Substances 0.000 description 5
- 239000008103 glucose Substances 0.000 description 4
- 150000008163 sugars Chemical class 0.000 description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 235000013339 cereals Nutrition 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 2
- -1 cellulose materials Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004848 polyfunctional curative Substances 0.000 description 2
- 235000019351 sodium silicates Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 2
- 239000004382 Amylase Substances 0.000 description 1
- 102000013142 Amylases Human genes 0.000 description 1
- 108010065511 Amylases Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 239000004348 Glyceryl diacetate Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 108090000637 alpha-Amylases Proteins 0.000 description 1
- 102000004139 alpha-Amylases Human genes 0.000 description 1
- 229940024171 alpha-amylase Drugs 0.000 description 1
- 235000019418 amylase Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229940088598 enzyme Drugs 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 235000019443 glyceryl diacetate Nutrition 0.000 description 1
- 239000001087 glyceryl triacetate Substances 0.000 description 1
- 235000013773 glyceryl triacetate Nutrition 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 150000004044 tetrasaccharides Chemical class 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- 150000004043 trisaccharides Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/167—Mixtures of inorganic and organic binding agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB37884/75A GB1546079A (en) | 1975-09-15 | 1975-09-15 | Alkali metal silicate binder compositions |
| GB3387376 | 1976-08-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2641249A1 DE2641249A1 (de) | 1977-03-31 |
| DE2641249B2 true DE2641249B2 (de) | 1981-04-16 |
Family
ID=26262059
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2641249A Ceased DE2641249B2 (de) | 1975-09-15 | 1976-09-14 | Lagerbeständiges Bindemittel zur Herstellung von Gießformen und - kernen |
| DE2660613A Expired DE2660613C2 (de) | 1975-09-15 | 1976-09-14 | Lagerbeständiges Bindemittel, das einen durch Reaktion mit Harnstoff oder Harnstoffderivaten stabilisierten Stärkesyrup enthält |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2660613A Expired DE2660613C2 (de) | 1975-09-15 | 1976-09-14 | Lagerbeständiges Bindemittel, das einen durch Reaktion mit Harnstoff oder Harnstoffderivaten stabilisierten Stärkesyrup enthält |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4070196A (ref) |
| AR (1) | AR211782A1 (ref) |
| AT (1) | AT346508B (ref) |
| AU (1) | AU502546B2 (ref) |
| BR (1) | BR7606063A (ref) |
| CA (1) | CA1065103A (ref) |
| DE (2) | DE2641249B2 (ref) |
| FR (1) | FR2323466A1 (ref) |
| IN (1) | IN148044B (ref) |
| IT (1) | IT1068750B (ref) |
| MX (1) | MX143816A (ref) |
| NL (1) | NL183028C (ref) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3403583A1 (de) * | 1984-02-02 | 1985-08-08 | Seaders, John, Corvallis, Oreg. | Bindemittelgemisch zur verfestigung |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1566417A (en) * | 1976-11-11 | 1980-04-30 | Foseco Int | Alkali metal silicate binder compositions |
| FR2445191A1 (fr) * | 1978-12-29 | 1980-07-25 | Roquette Freres | Moyens pour la fabrication des moules de fonderie |
| WO1980001767A1 (en) * | 1979-02-27 | 1980-09-04 | Foseco Int | Alkali metal silicate binder compositions |
| DE3060730D1 (en) * | 1979-02-27 | 1982-09-30 | Foseco Int | Alkali metal silicate binder compositions |
| DE2946500A1 (de) * | 1979-11-17 | 1981-05-27 | Henkel KGaA, 4000 Düsseldorf | Bindemittel auf basis von alkalimetallsilikatloesungen und deren verwendung |
| DE3104763C2 (de) * | 1981-02-11 | 1985-09-05 | Maizena Gmbh, 2000 Hamburg | Furanharzbindemittel für Gießereiform- und -kernsand |
| AU554310B2 (en) * | 1981-02-20 | 1986-08-14 | White Sea & Baltic Co. Ltd., The | Silicate solutions, their production and uses as binders |
| DE3369257D1 (en) * | 1982-12-11 | 1987-02-26 | Foseco Int | Alkali metal silicate binder compositions |
| US4640361A (en) * | 1985-12-13 | 1987-02-03 | Halliburton Company | Thermally responsive aqueous silicate mixtures and use thereof |
| US4836269A (en) * | 1986-07-14 | 1989-06-06 | Roberts Corporation | Forming apparatus having catalyst introduction simultaneous with sand injection |
| DE3908560A1 (de) * | 1989-03-16 | 1990-09-20 | Henkel Kgaa | Bindemittel auf basis waessriger alkalimetallsilikatloesungen und deren verwendung |
| US5089186A (en) * | 1990-07-11 | 1992-02-18 | Advanced Plastics Partnership | Process for core removal from molded products |
| US5660900A (en) * | 1992-08-11 | 1997-08-26 | E. Khashoggi Industries | Inorganically filled, starch-bound compositions for manufacturing containers and other articles having a thermodynamically controlled cellular matrix |
| US5506046A (en) * | 1992-08-11 | 1996-04-09 | E. Khashoggi Industries | Articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix |
| US5662731A (en) * | 1992-08-11 | 1997-09-02 | E. Khashoggi Industries | Compositions for manufacturing fiber-reinforced, starch-bound articles having a foamed cellular matrix |
| US5830305A (en) * | 1992-08-11 | 1998-11-03 | E. Khashoggi Industries, Llc | Methods of molding articles having an inorganically filled organic polymer matrix |
| US5658603A (en) * | 1992-08-11 | 1997-08-19 | E. Khashoggi Industries | Systems for molding articles having an inorganically filled organic polymer matrix |
| US5580624A (en) * | 1992-08-11 | 1996-12-03 | E. Khashoggi Industries | Food and beverage containers made from inorganic aggregates and polysaccharide, protein, or synthetic organic binders, and the methods of manufacturing such containers |
| US5709827A (en) * | 1992-08-11 | 1998-01-20 | E. Khashoggi Industries | Methods for manufacturing articles having a starch-bound cellular matrix |
| US5851634A (en) * | 1992-08-11 | 1998-12-22 | E. Khashoggi Industries | Hinges for highly inorganically filled composite materials |
| US5810961A (en) * | 1993-11-19 | 1998-09-22 | E. Khashoggi Industries, Llc | Methods for manufacturing molded sheets having a high starch content |
| US5545450A (en) * | 1992-08-11 | 1996-08-13 | E. Khashoggi Industries | Molded articles having an inorganically filled organic polymer matrix |
| US5928741A (en) * | 1992-08-11 | 1999-07-27 | E. Khashoggi Industries, Llc | Laminated articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix |
| US5582670A (en) * | 1992-08-11 | 1996-12-10 | E. Khashoggi Industries | Methods for the manufacture of sheets having a highly inorganically filled organic polymer matrix |
| US5830548A (en) * | 1992-08-11 | 1998-11-03 | E. Khashoggi Industries, Llc | Articles of manufacture and methods for manufacturing laminate structures including inorganically filled sheets |
| US5800647A (en) * | 1992-08-11 | 1998-09-01 | E. Khashoggi Industries, Llc | Methods for manufacturing articles from sheets having a highly inorganically filled organic polymer matrix |
| US5679145A (en) * | 1992-08-11 | 1997-10-21 | E. Khashoggi Industries | Starch-based compositions having uniformly dispersed fibers used to manufacture high strength articles having a fiber-reinforced, starch-bound cellular matrix |
| US5618341A (en) * | 1992-08-11 | 1997-04-08 | E. Khashoggi Industries | Methods for uniformly dispersing fibers within starch-based compositions |
| US5683772A (en) * | 1992-08-11 | 1997-11-04 | E. Khashoggi Industries | Articles having a starch-bound cellular matrix reinforced with uniformly dispersed fibers |
| US5508072A (en) * | 1992-08-11 | 1996-04-16 | E. Khashoggi Industries | Sheets having a highly inorganically filled organic polymer matrix |
| US5660903A (en) * | 1992-08-11 | 1997-08-26 | E. Khashoggi Industries | Sheets having a highly inorganically filled organic polymer matrix |
| US5716675A (en) * | 1992-11-25 | 1998-02-10 | E. Khashoggi Industries | Methods for treating the surface of starch-based articles with glycerin |
| DK169728B1 (da) * | 1993-02-02 | 1995-01-23 | Stein Gaasland | Fremgangsmåde til frigørelse af cellulosebaserede fibre fra hinanden i vand og støbemasse til plastisk formning af celluloseholdige fiberprodukter |
| US5738921A (en) * | 1993-08-10 | 1998-04-14 | E. Khashoggi Industries, Llc | Compositions and methods for manufacturing sealable, liquid-tight containers comprising an inorganically filled matrix |
| US6083586A (en) * | 1993-11-19 | 2000-07-04 | E. Khashoggi Industries, Llc | Sheets having a starch-based binding matrix |
| US5736209A (en) * | 1993-11-19 | 1998-04-07 | E. Kashoggi, Industries, Llc | Compositions having a high ungelatinized starch content and sheets molded therefrom |
| US5776388A (en) * | 1994-02-07 | 1998-07-07 | E. Khashoggi Industries, Llc | Methods for molding articles which include a hinged starch-bound cellular matrix |
| US5705203A (en) * | 1994-02-07 | 1998-01-06 | E. Khashoggi Industries | Systems for molding articles which include a hinged starch-bound cellular matrix |
| US5843544A (en) * | 1994-02-07 | 1998-12-01 | E. Khashoggi Industries | Articles which include a hinged starch-bound cellular matrix |
| US6168857B1 (en) | 1996-04-09 | 2001-01-02 | E. Khashoggi Industries, Llc | Compositions and methods for manufacturing starch-based compositions |
| US20080060778A1 (en) * | 2006-09-08 | 2008-03-13 | Abraham Velasco-Tellez | Binder composition and method of forming foundry sand cores and molds |
| ES2760927T3 (es) * | 2007-07-13 | 2020-05-18 | Advanced Ceramics Mfg Llc | Mandriles basados en áridos para la producción de piezas de material compuesto y métodos de producción de piezas de material compuesto |
| MX339544B (es) | 2008-12-18 | 2016-05-31 | Tenedora Nemak Sa De Cv | Metodo y composicion de aglomerante para fabricacion de moldes y/o corazones de arena para fundicion. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD36632A (ref) * | ||||
| US2024123A (en) * | 1932-07-02 | 1935-12-10 | Coating composition and method of | |
| BE551767A (ref) * | 1955-10-14 | |||
| BE555362A (ref) * | 1956-02-29 | |||
| DE1105566B (de) * | 1956-11-24 | 1961-04-27 | Maizena Werke G M B H Deutsche | Verfahren zur Herstellung von Kernbindemitteln fuer Giessereizwecke |
| US3287213A (en) * | 1965-06-30 | 1966-11-22 | Janssen Pharmaceutica Nv | Method of combatting arachnids and fungi |
| US3433691A (en) * | 1968-04-03 | 1969-03-18 | Diamond Shamrock Corp | Borated dextrin-silicate adhesives |
| AU2236370A (en) * | 1969-11-17 | 1972-05-18 | Minerals, Binders, Clays (Proprietary) Limited | Improvements in the co2 process for bonding, moulding and core sands in foundries |
| US3642503A (en) * | 1970-06-08 | 1972-02-15 | Foseco Int | Process for bonding particulate materials |
-
1976
- 1976-08-31 US US05/719,151 patent/US4070196A/en not_active Expired - Lifetime
- 1976-09-13 MX MX166278A patent/MX143816A/es unknown
- 1976-09-13 BR BR7606063A patent/BR7606063A/pt unknown
- 1976-09-14 CA CA261,203A patent/CA1065103A/en not_active Expired
- 1976-09-14 IT IT69236/76A patent/IT1068750B/it active
- 1976-09-14 AU AU17721/76A patent/AU502546B2/en not_active Expired
- 1976-09-14 DE DE2641249A patent/DE2641249B2/de not_active Ceased
- 1976-09-14 DE DE2660613A patent/DE2660613C2/de not_active Expired
- 1976-09-15 AR AR264719A patent/AR211782A1/es active
- 1976-09-15 NL NLAANVRAGE7610279,A patent/NL183028C/xx not_active IP Right Cessation
- 1976-09-15 FR FR7627661A patent/FR2323466A1/fr active Granted
- 1976-09-15 AT AT683376A patent/AT346508B/de not_active IP Right Cessation
-
1977
- 1977-07-23 IN IN1137/CAL/77A patent/IN148044B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3403583A1 (de) * | 1984-02-02 | 1985-08-08 | Seaders, John, Corvallis, Oreg. | Bindemittelgemisch zur verfestigung |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2323466A1 (fr) | 1977-04-08 |
| IN148044B (ref) | 1980-10-04 |
| ATA683376A (de) | 1978-03-15 |
| BR7606063A (pt) | 1977-08-23 |
| DE2641249A1 (de) | 1977-03-31 |
| NL7610279A (nl) | 1977-03-17 |
| AR211782A1 (es) | 1978-03-15 |
| NL183028B (nl) | 1988-02-01 |
| IT1068750B (it) | 1985-03-21 |
| CA1065103A (en) | 1979-10-30 |
| US4070196A (en) | 1978-01-24 |
| NL183028C (nl) | 1988-07-01 |
| AU502546B2 (en) | 1979-08-02 |
| MX143816A (es) | 1981-07-22 |
| AT346508B (de) | 1978-11-10 |
| FR2323466B1 (ref) | 1980-09-19 |
| DE2660613C2 (de) | 1983-11-03 |
| AU1772176A (en) | 1978-03-23 |
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