KR930701585A - 고활성 세제 입자의 제조방법 - Google Patents
고활성 세제 입자의 제조방법Info
- Publication number
- KR930701585A KR930701585A KR1019930700093A KR930700093A KR930701585A KR 930701585 A KR930701585 A KR 930701585A KR 1019930700093 A KR1019930700093 A KR 1019930700093A KR 930700093 A KR930700093 A KR 930700093A KR 930701585 A KR930701585 A KR 930701585A
- Authority
- KR
- South Korea
- Prior art keywords
- acid
- weight
- product
- neutralization
- loop
- Prior art date
Links
- 239000003599 detergent Substances 0.000 title claims abstract 7
- 239000002245 particle Substances 0.000 title claims abstract 6
- 238000004519 manufacturing process Methods 0.000 title claims abstract 4
- 239000002253 acid Substances 0.000 claims abstract 12
- 238000006386 neutralization reaction Methods 0.000 claims abstract 9
- 239000003945 anionic surfactant Substances 0.000 claims abstract 3
- OYIFNHCXNCRBQI-UHFFFAOYSA-N 2-aminoadipic acid Chemical compound OC(=O)C(N)CCCC(O)=O OYIFNHCXNCRBQI-UHFFFAOYSA-N 0.000 claims abstract 2
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims abstract 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims abstract 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims abstract 2
- JINBYESILADKFW-UHFFFAOYSA-N aminomalonic acid Chemical compound OC(=O)C(N)C(O)=O JINBYESILADKFW-UHFFFAOYSA-N 0.000 claims abstract 2
- 235000003704 aspartic acid Nutrition 0.000 claims abstract 2
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims abstract 2
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 claims abstract 2
- 150000003839 salts Chemical class 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 4
- -1 alkali metal salts Chemical class 0.000 claims 3
- 125000000217 alkyl group Chemical group 0.000 claims 3
- 150000008051 alkyl sulfates Chemical class 0.000 claims 3
- 230000003472 neutralizing effect Effects 0.000 claims 3
- 239000002202 Polyethylene glycol Substances 0.000 claims 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 2
- 229920001223 polyethylene glycol Polymers 0.000 claims 2
- 229910052708 sodium Inorganic materials 0.000 claims 2
- 239000011734 sodium Substances 0.000 claims 2
- QHSCIWIRXWFIGH-UHFFFAOYSA-N 2-amino-2-methylpentanedioic acid Chemical compound OC(=O)C(N)(C)CCC(O)=O QHSCIWIRXWFIGH-UHFFFAOYSA-N 0.000 claims 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 239000003513 alkali Substances 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 239000003518 caustics Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 claims 1
- 235000014113 dietary fatty acids Nutrition 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 229930195729 fatty acid Natural products 0.000 claims 1
- 239000000194 fatty acid Substances 0.000 claims 1
- 150000004665 fatty acids Chemical class 0.000 claims 1
- 235000013922 glutamic acid Nutrition 0.000 claims 1
- 239000004220 glutamic acid Substances 0.000 claims 1
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- 238000000227 grinding Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000002736 nonionic surfactant Substances 0.000 claims 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 150000007513 acids Chemical class 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents
- C11D11/04—Special methods for preparing compositions containing mixtures of detergents by chemical means, e.g. by sulfonating in the presence of other compounding ingredients followed by neutralising
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
본 발명은 산 형태의 음이온성 계면활성제를 연속중화 시스템에서 알칼리 금속 수산화물 용액과 반응시키고 이러한 시스템에 글리탐산, 아스파르트산, 아미노말론산, 아미노 아디프산 및 2-아미노-2-메틸-펜탄디오산 또는 이들의 염으로 이루어진 그룹중에서 선택된 α-아미노디카복실산을 첨가함을 포함하는 고활성 세제입자의 제조방법에 관한 것이다. 일나트륨 및 이나트륨 글루타메이트가 바람직하다.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
Claims (14)
- (a) 산 형태의 음이온성 계면활성제를 연속 고활성 중화루프 속에서 30 내지 75중량%(바람직하게는 62내지 73중량%)가 수산화물이고 화학양론적 양 내지 화학양론적 양보다 약간 과량으로 존재하는 알칼리 금속 수산화물 용액(바람직하게는 수산화나트륨)과 반응시켜 중화 생성물을 생성시키는 단계; (b) 이러한 중화 생성물이 생성되는 동안 글루탐산(바람직함), 아스파르트산(바람직함), 아미노말론산, 아미노아디프산 및 2-아미노-2-메틸-펜탄디오산 또는 이들의 알칼리 금속염으로 이루어진 그룹중에서 선택된 α-아미노디카복실산을 당해 연속 고활성 중화 루프에 첨가하는 단계 및 (c) 단계(b)의 용융된 중화 생성물을 냉각시킨 다음 연속적으로 또는 이와 동시에 프릴링, 압출, 과립화 또는 플레이킹시킴으로써 음이온성 계면활성제 50 내지 90중량%(바람직하게는 75 내지 85중량%)와 α-아미노디카복실산 염 0.2 내지 15중량%를 함유하는 세제 입자를 형성시키는 단계를 포함함을 특징으로 하며, 고활성 세제 입자를 제조하는 방법.
- 제1항에 있어서, 일나트륨 또는 이나트륨 글루타메이트 1 내지 10중량%가 중화 루프에 첨가되는 방법.
- 제2항에 있어서, 산 형태의 C12-18알킬 설페이트가 사용되는 방법.
- 제3항에 있어서, C12-18나트륨 알킬 설페이트 대 C10-16나트륨 선형 알킬 벤젠 설포네이트의 최종 비가 75 : 25 내지 96 : 4로 되도록 산 형태의 C12-18알킬 설페이트와 C10-16선형 알킬 벤젠 설페이트의 혼합물이 수산화나트륨과 반응되는 방법.
- 제4항에 있어서, 당해 혼합물이 산 형태의 C14-16알킬 설페이트와 C11-14선형 알킬 벤젠 설페이트 또는 C12-18지방산의 혼합물인 방법.
- 제5항에 있어서, 당해 중화 생성물의 수분 함량이 12중량%이하인 방법.
- 제1항에 있어서, 당해 중화 생성물이 생성되는 동안 분자량이 4,000 내지 50,000인 폴리에틸렌 글리콜, 융점이 120℉(48.9℃) 이상인 일반식 R(OC2H4)mOH의 에톡시화 비이온성 계면활성제(여기서, R은 C12-18알킬 그룹 또는 C8-16알킬 페놀 그룹이고, n은 9 내지 80이다) 또는 이들의 혼합물을 단계(a)의 성분들과 함께 1 : 5 내지 1 : 20의 중량비로 중화 루프에 첨가하는 단계를 추가로 포함하는 방법.
- 제8항에 있어서, 분자량이 7,000 내지 12,000인 폴리에틸렌 글리콜이 첨가되는 방법.
- 제8항에 있어서, 중화루프가 절연되고 고전단 혼합기, 양변위 펌프 및 냉각기를 포함하는 방법.
- 제9항에 있어서, 중화루프가 도입되고 산과 가성 알칼리 스트림이 고전단 혼합기에 위치되고 이러한 중화 루프내의 고전단 혼합기 다음 양변위 펌프 전에 첨가제가 계량되는 방법.
- 제1항에 있어서, 용융된 생성물을 동시에 냉각 및 압출시킨 다음 세제 입자로 절단 또는 분쇄시킴을 포함하는 방법.
- 제1항에 있어서, 단계(b)의 생성물이 고형화 될 때까지 이를 냉각 롤에서 냉각시키고, 이와 같이 냉각롤로 부터 고형화된 생성물을 세제 레이크로 플레이킹시키며 수분 함량이 5%이하로 되도록 건조시킨 다음 세제 입자로 기계적으로 분쇄시킴을 포함하는 방법.
- 제1항에 있어서, 산 형태의 C12-18메틸에스테르 설포네이트가 사용되는 방법.
- ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/552663 | 1990-07-16 | ||
US07/552,663 US5066425A (en) | 1990-07-16 | 1990-07-16 | Formation of high active detergent particles |
PCT/US1991/004722 WO1992001778A1 (en) | 1990-07-16 | 1991-07-03 | Formation of high active detergent particles |
Publications (1)
Publication Number | Publication Date |
---|---|
KR930701585A true KR930701585A (ko) | 1993-06-12 |
Family
ID=24206269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930700093A KR930701585A (ko) | 1990-07-16 | 1991-07-03 | 고활성 세제 입자의 제조방법 |
Country Status (23)
Country | Link |
---|---|
US (1) | US5066425A (ko) |
EP (1) | EP0539519B1 (ko) |
JP (1) | JP2950989B2 (ko) |
KR (1) | KR930701585A (ko) |
CN (1) | CN1030774C (ko) |
AR (1) | AR246556A1 (ko) |
AT (1) | ATE106445T1 (ko) |
AU (1) | AU8418591A (ko) |
CA (1) | CA2086621C (ko) |
DE (1) | DE69102279T2 (ko) |
DK (1) | DK0539519T3 (ko) |
EG (1) | EG19511A (ko) |
ES (1) | ES2055616T3 (ko) |
FI (1) | FI930165A0 (ko) |
HK (1) | HK90596A (ko) |
ID (1) | ID941B (ko) |
MA (1) | MA22224A1 (ko) |
MX (1) | MX9100198A (ko) |
MY (1) | MY107969A (ko) |
NO (1) | NO930091L (ko) |
NZ (1) | NZ238971A (ko) |
PL (1) | PL169618B1 (ko) |
WO (1) | WO1992001778A1 (ko) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0170424B1 (ko) * | 1990-07-05 | 1999-01-15 | 호르스트 헤를레,요한 글라슬 | 세제 및 청정제용 표면 활성제 과립의 제조방법 |
DE4038476A1 (de) * | 1990-12-03 | 1992-06-04 | Henkel Kgaa | Feste waschmittel |
HU9400115D0 (en) * | 1991-07-15 | 1994-05-30 | Procter & Gamble | Process for producing a detergent composition containing alkyl sulfate particles and base granules |
GB9120653D0 (en) * | 1991-09-27 | 1991-11-06 | Procter & Gamble | Dispensing agent |
EP0592033A1 (en) * | 1992-10-07 | 1994-04-13 | The Procter & Gamble Company | Process for making peroxyacid containing particles |
DE69320455T2 (de) * | 1993-03-30 | 1999-04-22 | Procter & Gamble | Hochaktive körnige Reinigungsmittel enthaltend Chelatbildner und Polymere und Verfahren zu ihrer Herstellung |
DE4324396A1 (de) * | 1993-07-21 | 1995-01-26 | Henkel Kgaa | Reinigungsmittel mit hohem Benetzungsvermögen |
US5474710A (en) * | 1993-08-27 | 1995-12-12 | Ofosu-Asanta; Kofi | Process for preparing concentrated surfactant mixtures containing magnesium |
US5415801A (en) * | 1993-08-27 | 1995-05-16 | The Procter & Gamble Company | Concentrated light duty liquid or gel dishwashing detergent compositions containing sugar |
AU1516795A (en) * | 1993-12-30 | 1995-07-17 | Ecolab Inc. | Method of making non-caustic solid cleaning compositions |
AU682244B2 (en) * | 1993-12-30 | 1997-09-25 | Ecolab Inc. | Method of making urea-based solid cleaning compositions |
JP3920325B2 (ja) * | 1993-12-30 | 2007-05-30 | エコラボ インコーポレイテッド | 高アルカリ性固形洗浄構成物 |
US6489278B1 (en) * | 1993-12-30 | 2002-12-03 | Ecolab Inc. | Combination of a nonionic silicone surfactant and a nonionic surfactant in a solid block detergent |
DE69426356T2 (de) * | 1994-04-20 | 2001-06-21 | Procter & Gamble | Verfahren zur Herstellung von rieselfähigen Waschmittelgranulaten |
US5703037A (en) * | 1994-04-20 | 1997-12-30 | The Procter & Gamble Company | Process for the manufacture of free-flowing detergent granules |
US5565137A (en) * | 1994-05-20 | 1996-10-15 | The Proctor & Gamble Co. | Process for making a high density detergent composition from starting detergent ingredients |
US5968892A (en) * | 1994-06-17 | 1999-10-19 | Hutchins; James Peyton | Non-brittle laundry bars comprising coconut alkyl sulfate and polyethylene glycol |
US5814596A (en) * | 1994-06-24 | 1998-09-29 | The Procter & Gamble Company | Structured detergent pastes and a method for manufacturing detergent particles from such pastes |
EP0688862A1 (en) * | 1994-06-24 | 1995-12-27 | The Procter & Gamble Company | Structured detergent pastes and a method for manufacturing detergent particles from such pastes |
BR9608292A (pt) * | 1995-04-17 | 1999-05-11 | Procter & Gamble | Preparação e uso de partículas compósitas que contém peróxido de diacila |
US6673765B1 (en) | 1995-05-15 | 2004-01-06 | Ecolab Inc. | Method of making non-caustic solid cleaning compositions |
GB9618877D0 (en) * | 1996-09-10 | 1996-10-23 | Unilever Plc | Process for preparing high bulk density detergent compositions |
DE19648014C2 (de) * | 1996-11-20 | 2002-09-19 | Cognis Deutschland Gmbh | Wasserfreie Tensidgemische |
US6057280A (en) * | 1998-11-19 | 2000-05-02 | Huish Detergents, Inc. | Compositions containing α-sulfofatty acid esters and methods of making and using the same |
CN1162531C (zh) * | 1998-11-25 | 2004-08-18 | 宝洁公司 | 清洁剂组合物的制备方法 |
US6369021B1 (en) | 1999-05-07 | 2002-04-09 | Ecolab Inc. | Detergent composition and method for removing soil |
DE10163603B4 (de) * | 2001-12-21 | 2006-05-04 | Henkel Kgaa | Verfahren zur Herstellung builderhaltiger Tensidgranulate |
JP2010511761A (ja) † | 2006-12-08 | 2010-04-15 | ユニリーバー・ナームローゼ・ベンノートシヤープ | 高濃度界面活性剤組成物 |
WO2011008570A2 (en) * | 2009-07-16 | 2011-01-20 | Dow Global Technologies, Inc. | Sulfonate surfactants and methods of preparation and use |
MX2016003051A (es) * | 2013-09-09 | 2016-06-10 | Procter & Gamble | Proceso para elaborar una composicion liquida de limpieza. |
EP3146034B1 (en) * | 2014-05-23 | 2019-07-10 | The Procter and Gamble Company | Two-stage neutralization process for forming detergent granules, and products containing the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3597361A (en) * | 1969-05-21 | 1971-08-03 | Stauffer Chemical Co | Method of preparing agglomerated detergent composition |
GB1361627A (en) * | 1970-08-04 | 1974-07-30 | Marumo H | Detergent composition |
JPS4861511A (ko) * | 1971-12-06 | 1973-08-29 | ||
US4515707A (en) * | 1983-06-27 | 1985-05-07 | The Chemithon Corporation | Intermediate product for use in producing a detergent bar and method for producing same |
EP0229671B1 (en) * | 1986-01-17 | 1991-03-13 | Kao Corporation | High-density granular detergent composition |
CA2017922C (en) * | 1989-06-09 | 1995-07-11 | Frank Joseph Mueller | Formation of discrete, high active detergent granules using a continuous neutralization system |
-
1990
- 1990-07-16 US US07/552,663 patent/US5066425A/en not_active Expired - Lifetime
-
1991
- 1991-07-03 DK DK91915259.5T patent/DK0539519T3/da active
- 1991-07-03 EP EP91915259A patent/EP0539519B1/en not_active Expired - Lifetime
- 1991-07-03 AU AU84185/91A patent/AU8418591A/en not_active Abandoned
- 1991-07-03 AT AT91915259T patent/ATE106445T1/de not_active IP Right Cessation
- 1991-07-03 CA CA002086621A patent/CA2086621C/en not_active Expired - Fee Related
- 1991-07-03 PL PL91297385A patent/PL169618B1/pl unknown
- 1991-07-03 JP JP3513706A patent/JP2950989B2/ja not_active Expired - Fee Related
- 1991-07-03 ES ES91915259T patent/ES2055616T3/es not_active Expired - Lifetime
- 1991-07-03 KR KR1019930700093A patent/KR930701585A/ko active IP Right Grant
- 1991-07-03 WO PCT/US1991/004722 patent/WO1992001778A1/en active IP Right Grant
- 1991-07-03 DE DE69102279T patent/DE69102279T2/de not_active Expired - Fee Related
- 1991-07-12 MX MX9100198A patent/MX9100198A/es not_active IP Right Cessation
- 1991-07-14 EG EG42691A patent/EG19511A/xx active
- 1991-07-15 NZ NZ238971A patent/NZ238971A/en unknown
- 1991-07-15 MA MA22499A patent/MA22224A1/fr unknown
- 1991-07-15 AR AR91320164A patent/AR246556A1/es active
- 1991-07-15 MY MYPI91001268A patent/MY107969A/en unknown
- 1991-07-16 CN CN91105591A patent/CN1030774C/zh not_active Expired - Fee Related
- 1991-12-31 ID IDP131291A patent/ID941B/id unknown
-
1993
- 1993-01-12 NO NO93930091A patent/NO930091L/no unknown
- 1993-01-15 FI FI930165A patent/FI930165A0/fi unknown
-
1996
- 1996-05-23 HK HK90596A patent/HK90596A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0539519A1 (en) | 1993-05-05 |
AU8418591A (en) | 1992-02-18 |
HK90596A (en) | 1996-05-31 |
MX9100198A (es) | 1992-02-28 |
ID941B (id) | 1996-09-19 |
NO930091D0 (no) | 1993-01-12 |
FI930165A (fi) | 1993-01-15 |
CN1059366A (zh) | 1992-03-11 |
JP2950989B2 (ja) | 1999-09-20 |
EP0539519B1 (en) | 1994-06-01 |
FI930165A0 (fi) | 1993-01-15 |
CA2086621C (en) | 1997-04-15 |
MA22224A1 (fr) | 1992-04-01 |
AR246556A1 (es) | 1994-08-31 |
WO1992001778A1 (en) | 1992-02-06 |
ATE106445T1 (de) | 1994-06-15 |
ES2055616T3 (es) | 1994-08-16 |
NO930091L (no) | 1993-02-23 |
JPH05508679A (ja) | 1993-12-02 |
DK0539519T3 (da) | 1994-09-26 |
EG19511A (en) | 1995-06-29 |
DE69102279D1 (de) | 1994-07-07 |
PL169618B1 (pl) | 1996-08-30 |
DE69102279T2 (de) | 1994-11-03 |
PL297385A1 (ko) | 1992-07-13 |
US5066425A (en) | 1991-11-19 |
MY107969A (en) | 1996-07-15 |
CN1030774C (zh) | 1996-01-24 |
CA2086621A1 (en) | 1992-01-17 |
NZ238971A (en) | 1994-12-22 |
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