KR870008012A - 개량된 윤활유 - Google Patents
개량된 윤활유 Download PDFInfo
- Publication number
- KR870008012A KR870008012A KR870001542A KR870001542A KR870008012A KR 870008012 A KR870008012 A KR 870008012A KR 870001542 A KR870001542 A KR 870001542A KR 870001542 A KR870001542 A KR 870001542A KR 870008012 A KR870008012 A KR 870008012A
- Authority
- KR
- South Korea
- Prior art keywords
- metal
- base material
- weight percent
- lubricant
- carbamate
- Prior art date
Links
- 239000000314 lubricant Substances 0.000 title claims 7
- 229910052751 metal Inorganic materials 0.000 claims abstract 11
- 239000002184 metal Substances 0.000 claims abstract 11
- 229910001463 metal phosphate Inorganic materials 0.000 claims abstract 7
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract 6
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 claims abstract 5
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims abstract 4
- 239000012990 dithiocarbamate Substances 0.000 claims abstract 4
- 239000010687 lubricating oil Substances 0.000 claims abstract 4
- 125000000217 alkyl group Chemical group 0.000 claims abstract 3
- -1 alkyl phenol sulfide Chemical compound 0.000 claims abstract 3
- 125000005027 hydroxyaryl group Chemical group 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims abstract 3
- GOHYJHLGLUVFQB-UHFFFAOYSA-N 1-nonyl-7-thiabicyclo[4.1.0]hepta-2,4-dien-6-ol Chemical compound C1=CC=CC2(CCCCCCCCC)C1(O)S2 GOHYJHLGLUVFQB-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 2
- 125000005189 alkyl hydroxy group Chemical group 0.000 claims 2
- 229910052725 zinc Inorganic materials 0.000 claims 2
- 239000011701 zinc Substances 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 150000003568 thioethers Chemical class 0.000 claims 1
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 claims 1
- 150000003752 zinc compounds Chemical class 0.000 abstract 2
- 230000001050 lubricating effect Effects 0.000 abstract 1
Classifications
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- 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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
-
- 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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
-
- 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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/20—Thiols; Sulfides; Polysulfides
- C10M135/28—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to a carbon atom of a six-membered aromatic ring
- C10M135/30—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to a carbon atom of a six-membered aromatic ring containing hydroxy groups; Derivatives thereof
-
- 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
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/088—Neutral salts
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
-
- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/02—Groups 1 or 11
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/14—Group 7
-
- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/16—Groups 8, 9, or 10
-
- 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
- C10N2040/25—Internal-combustion engines
-
- 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
- C10N2040/25—Internal-combustion engines
- C10N2040/251—Alcohol-fuelled engines
-
- 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
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
-
- 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
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
- C10N2040/28—Rotary engines
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
Claims (10)
- 기본 재료, 금속 포스페이트, 금속 카바메이트 및 알킬 하이드록시 아릴 설파이드로 구성되며 개량된 성질을 가지는 윤활유.
- 제 1 항에 있어서, 금속 포스페이트가 1B,2B,6B,8B 족 그룹 및 그것의 혼합물로부터 선택된 금속으로 구성되는 윤활유.
- 제 2 항에 있어서, 금속 포스페이트가 아연, 니켈, 구리 및 그것의 혼합물로구성되는 그룹에서 선택된 것인 윤활유.
- 제 3 항에 있어서, 금속 포스페이트가 금속 알킬포스페이트로 구성되는 윤활유.
- 제 1 항에 있어서, 금속 카바메이트가 금속 디티오 카바메이트로 구성된 윤활유.
- 제 1 항에 있어서, 알킬 하이드록시-아릴 설파이드가 알킬 페놀 설파이드로 구성된 윤활유.
- 기본 재료, 기본 재료에 기초하여 약 0.1-약 1.0중량%의 금속디알킬디티오포스페이트, 약 0.1-약1.3중량%의 금속 디티오카바메이트 및 약 0.2-약 2.0중량%의 알킬 하이드록시-아릴 설파이드로 구성되는 윤활유.
- 제 7 항에 있어서, 기본 재료에 기초하여 약 0.3-약 0.6중량% 금속 디알킬디티오포스페이트 약 0.2-약 0.8중량% 금속 디티오카바메이트 및 약 0.4-약 0.8중량% 알킬 하이드록시-아릴 설파이드로 구성되는 윤활유.
- 기본 재료에 효과적인 양의 금속 포스페이트, 금속 카바메이트 및 알킬 하이드록시 아릴 설파이드를 부가하는 것으로 구성되는, 윤활유의 마모 방지 성질을 개량하는 방법.
- 제 9 항에 있어서, 기본 재료에 효과적인 양의 아연 디알킬디티오포스페이트, 아연 디티오카바메이트 및 노닐 페놀 설파이드를 부가하는 것으로 구성되는 방법.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83202186A | 1986-02-24 | 1986-02-24 | |
US832,021 | 1986-02-24 | ||
US832.021 | 1986-02-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR870008012A true KR870008012A (ko) | 1987-09-23 |
KR950006559B1 KR950006559B1 (ko) | 1995-06-16 |
Family
ID=25260452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019870001542A KR950006559B1 (ko) | 1986-02-24 | 1987-02-24 | 개량된 윤활유 |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0234923B1 (ko) |
JP (1) | JPS62253691A (ko) |
KR (1) | KR950006559B1 (ko) |
AT (1) | ATE56221T1 (ko) |
AU (1) | AU585699B2 (ko) |
BR (1) | BR8700804A (ko) |
CA (1) | CA1284489C (ko) |
DE (1) | DE3764665D1 (ko) |
ES (1) | ES2017713B3 (ko) |
GR (1) | GR3001143T3 (ko) |
HK (1) | HK24691A (ko) |
MY (1) | MY100994A (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2915611B2 (ja) * | 1991-04-01 | 1999-07-05 | 協同油脂株式会社 | 等速ジョイント用グリース組成物 |
JP3086727B2 (ja) * | 1991-08-09 | 2000-09-11 | オロナイトジャパン株式会社 | 低リンエンジン油製造用の添加剤組成物 |
US7625847B2 (en) | 2002-08-05 | 2009-12-01 | Nippon Oil Corporation | Lubricating oil compositions |
US7563752B2 (en) | 2002-08-05 | 2009-07-21 | Nippon Oil Corporation | Lubricating oil compositions |
JP2004083746A (ja) | 2002-08-27 | 2004-03-18 | Nippon Oil Corp | 内燃機関用潤滑油組成物 |
WO2004020557A1 (ja) | 2002-08-27 | 2004-03-11 | Nippon Oil Corporation | 潤滑油組成物 |
JP4578115B2 (ja) | 2004-02-04 | 2010-11-10 | Jx日鉱日石エネルギー株式会社 | 潤滑油組成物 |
US7294684B2 (en) * | 2005-11-11 | 2007-11-13 | Dover Chemical Corporation | Dimeric and polymeric alkylphenol polysulfides |
CN112680266B (zh) * | 2020-12-14 | 2022-10-04 | 常州龙邦润滑科技有限公司 | 一种抗燃液压油组合物及其制备方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB801151A (en) * | 1955-01-27 | 1958-09-10 | Lubrizol Corp | Gear lubricant improving agents |
US3639240A (en) * | 1969-09-17 | 1972-02-01 | Atlas Chem Ind | Corrosion inhibitors for oil media |
FR2182652B2 (ko) * | 1972-04-19 | 1979-01-12 | Telecommunications Sa | |
GB2056482A (en) * | 1979-08-13 | 1981-03-18 | Exxon Research Engineering Co | Lubricating oil compositions |
-
1987
- 1987-02-13 CA CA000529695A patent/CA1284489C/en not_active Expired - Lifetime
- 1987-02-20 BR BR8700804A patent/BR8700804A/pt unknown
- 1987-02-20 MY MYPI87000177A patent/MY100994A/en unknown
- 1987-02-23 AU AU69158/87A patent/AU585699B2/en not_active Ceased
- 1987-02-24 AT AT87301610T patent/ATE56221T1/de not_active IP Right Cessation
- 1987-02-24 ES ES87301610T patent/ES2017713B3/es not_active Expired - Lifetime
- 1987-02-24 EP EP87301610A patent/EP0234923B1/en not_active Expired - Lifetime
- 1987-02-24 KR KR1019870001542A patent/KR950006559B1/ko active IP Right Grant
- 1987-02-24 JP JP62039315A patent/JPS62253691A/ja active Pending
- 1987-02-24 DE DE8787301610T patent/DE3764665D1/de not_active Expired - Lifetime
-
1990
- 1990-11-30 GR GR90401007T patent/GR3001143T3/el unknown
-
1991
- 1991-04-04 HK HK246/91A patent/HK24691A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
EP0234923A3 (en) | 1988-09-14 |
DE3764665D1 (de) | 1990-10-11 |
JPS62253691A (ja) | 1987-11-05 |
KR950006559B1 (ko) | 1995-06-16 |
MY100994A (en) | 1991-06-29 |
EP0234923A2 (en) | 1987-09-02 |
ATE56221T1 (de) | 1990-09-15 |
AU585699B2 (en) | 1989-06-22 |
CA1284489C (en) | 1991-05-28 |
AU6915887A (en) | 1987-08-27 |
EP0234923B1 (en) | 1990-09-05 |
ES2017713B3 (es) | 1991-03-01 |
GR3001143T3 (en) | 1992-06-25 |
HK24691A (en) | 1991-04-12 |
BR8700804A (pt) | 1987-12-15 |
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