WO1999060082A1 - Stable quaternary ammonium compositions - Google Patents
Stable quaternary ammonium compositions Download PDFInfo
- Publication number
- WO1999060082A1 WO1999060082A1 PCT/EP1999/003367 EP9903367W WO9960082A1 WO 1999060082 A1 WO1999060082 A1 WO 1999060082A1 EP 9903367 W EP9903367 W EP 9903367W WO 9960082 A1 WO9960082 A1 WO 9960082A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- quaternary ammonium
- ammonium material
- alkyl
- stabilising agent
- group
- Prior art date
Links
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
- C11D3/30—Amines; Substituted amines ; Quaternized amines
-
- 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2003—Alcohols; Phenols
- C11D3/2065—Polyhydric alcohols
-
- 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
- C11D3/32—Amides; Substituted amides
- C11D3/323—Amides; Substituted amides urea or derivatives thereof
Definitions
- the present invention relates to the stability of quaternary ammonium materials, in particular it relates to maintaining stable quaternary ammonium materials containing at least one ester group, in the raw material form or as a solution in a suitable solvent.
- Quaternary ammonium materials both solid or liquid are used extensively in fabric softener compositions.
- Such compositions contain a water insoluble quaternary ammonium fabric softening agent dispersed in water at a level of quaternary ammonium softening agent up to 8% by weight in which case the compositions are considered dilute or at levels from 8 to 50% in which case the compositions are considered concentrates.
- the problem associated with quaternary ammonium materials containing at least one ester group is their instability on storage .
- the problem is particularly noticeable in the storage of these materials at variable temperatures over time, especially at elevated temperatures eg in the region of 40- 90°C, such as 50-85°C.
- the instability of both such solid and liquid quaternary ammonium material may manifest itself by the discolouration of such material during storage at various temperatures.
- the amount of discolouration is generally an indication of the level of decomposition occurring over time. This decomposition is of greatest concern when quaternary ammonium material is stored at temperatures above their melting points.
- Instability may also manifest itself by alkyl halide appearance in the sample, indicating decomposition of the quaternary ammonium material. Instability may be referred to as caused by, or indicated by, de-quaternisation of the quaternary ammonium material .
- EP 299 176 discloses soft-flnishmg agents comprising a di-long chained quaternary ammonium salt containing a single ester group and a decyldimethyl amme .
- EP 499 282 discloses compositions comprising a quaternary ammonium compound and an aliphatic amme.
- EP 332 270 discloses compositions comprising a quaternary ammonium fabric softening agent, an amme and an amphotenc material.
- low and high temperature stability of the aforementioned solid or liquid quaternary ammonium compounds may be improved by the addition of at least one stabilising agent selected from specific group of compounds which improve the stability of the composition.
- improved stable compositions comprising quaternary ammonium material materials containing at least one ester group characterised in that they further comprise one or more stabilising agent (s) chosen from;
- urea b) urea derivatives c) one or more organic compounds having at least one free lone pair of electrons chosen from; i) primary amines RNH2, where R is a 03- 17 alkyl, alkenyl, hydroxyalkyl or substituted derivative thereof, ii) secondary amines, and/or
- R R R are independently Ci -C 22 alkyl, alkenyl or hydroxyalkyl groups or substituted derivatives thereof, and wherein when both R 1 and R 2 are -CH 2 CH 2 OH or both R 1 and R 2 are
- R 4 C0 is C 16 _ 18 , then R 3 is not a methyl group iv) glycerol
- compositions show improved stability at varying temperatures .
- a solid rinse conditioner comprising a composition as defined above .
- liquid rmse conditioner made by dilution of a composition as defined above with water.
- ester group in the ammonium material material includes an ester group which links two hydrocarbyl chains.
- References herein to ammonium material materials are to those having at least one ester group m their structure .
- the quaternary ammonium materials containing at least one ester group of the invention preferably do not contain substantial amounts of non- ester containing material.
- the ester containing quaternary ammonium material is used the absence of non-ester group quaternary ammonium containing material.
- small amounts eg less than 20% by weight based on the amount of total quaternary ammonium material, preferably less than 10% may be present.
- the invention is of application to quaternary ammonium materials containing at least one ester group, wherein at least one higher molecular weight group and two or three lower molecular weight groups are linked to a common nitrogen atom to produce a cation and wherein the electrically balancing anion is a halide, acetate or lower alkosulphate ion, such as chloride or methosulphate .
- the higher molecular weight substituent on the nitrogen is preferably a higher alkyl group, containing 12 to 28, preferably 12 to 22, such as 14 to 20 carbon atoms, such as coco-alkyl, tallowalkyl, hydrogenated tallowalkyl or substituted higher alkyl.
- the lower molecular weight substituents are preferably lower alkyl of 1 to 4 carbon atoms, such as methyl or ethyl, or substituted lower alkyl.
- One or more of the said lower molecular weight substituents may include an aryl moiety or may be replaced by an aryl, such as benzyl, phenyl or other suitable substituents.
- a preferred quaternary ammonium salt is a di-higher alkyl, di- lower alkyl ammonium halide.
- the quaternary ammonium is a compound having two C ⁇ 2 -C 22 alkyl or alkenyl groups connected to a quaternary ammonium head group via at least one ester link or a compound comprising a single long chain with an average chain length equal to or greater than C 2 Q- Preferably there are two or more such ester linkages. More the quaternary ammonium material has two long chain alkyl or alkenyl chains with an average chain length equal to or greater than C 1 .
- each chain has an average chain length equal to or greater than C 15 .
- Most preferably at least 50% of each long chain alkyl or alkenyl group has a chain length of O ⁇ g. It is preferred if the long chain alkenyl or alkenyl groups are predominantly linear.
- the quaternary ammonium material contains two or more ester groups.
- the ester group (s) are linking groups between a hydrocarbyl chain, eg an alkyl chain, attached to the quaternary nitrogen atom and a further hydrocarbyl chain, eg an alkyl group .
- ester-linked quaternary ammonium material for use in the invention can be represented by the formula:
- each R group is independently selected from C ⁇ _ 4 alkyl, hydroxyalkyl or C 2 _ 4 alkenyl groups; and wherein each
- R group is independently selected from Cs- 2 8 alkyl or alkenyl groups;
- X is any suitable counterion, for instance a halide, acetate or lower alkosulphate ion, such as chloride or methosulphate .
- T is -O-C- or -C-0-; and n is an integer from 1-5 or is 0 It is especially preferred that compounds of type (A) each R 1 group is methyl and each n is 2. It is also preferred that where R 1 is methyl then R 2 is not ethanol .
- Di (tallowyloxyethyl) dimethyl ammonium chloride available from Hoechst, is especially preferred, also Di (hardened tallowyloxyethyl) dimethyl ammonium chloride, ex Hoechst).
- ester linked quaternary ammonium material Another preferred type of ester linked quaternary ammonium material that can be used in the invention is represented by the formula:
- Preferred materials of this class such as 1,2 bis [hardened tallowoyloxy] -3- trimethylammonium propane chloride and their method of preparation are, for example, described m US 4 137 180 (Lever Brothers) .
- these materials comprise small amounts of the corresponding monoester as described in US 4 137 180 for example 1-hardened tallow- oyloxy-2-hydroxy -3-tr ⁇ methylammon ⁇ um propane chloride.
- the quaternary ammonium compound according to the invention has at least one methyl group attached to the quaternary nitrogen atom and two or three nitrogen atom substituents containing electron withdrawing groups and a chloride counterion. It is especially preferred that such compounds falling within general formula A above are used and particularly that both R 1 groups are methyl and in the remaining radicals n is 1 or 2 and R 2 is C ⁇ 2 - 22 especially C 16 _ 22 eg Tallow.
- the quaternary ammonium compound used in the present invention is substantially anhydrous, meaning containing less than 10% water in the context of the present invention.
- the quaternary ammonium material may contain optional additional components, as known in the art, in particular, low molecular weight solvents, for instance isopropanol and/or ethanol, and co-actives such as nonionic softeners, for example fatty acid or sorbitan esters.
- low molecular weight solvents for instance isopropanol and/or ethanol
- co-actives such as nonionic softeners, for example fatty acid or sorbitan esters.
- any of the above-mentioned stabilising agents may be used according to the invention.
- the stabilising agent is preferably added to the composition of the present invention at levels of 0.05 to 10% by weight of the weight of the quaternary ammonium material, more preferably 0.5 to 8.5% and even more preferably 0.75 to 7.5%, eg 1 to 5%.
- R R R R substituents include OCOR4 substituents wherein R 4 is a C 12 - C 22 alkyl or alkenyl chain.
- the quaternary ammonium material has 2 or less methyl groups directly attached to the quaternary nitrogen atom.
- the most preferred stabilising agents are urea and tertiary amines where R 1 and R 2 are 0 ⁇ - C 2 alkyl groups and R 3 is a C 2 - C 4 hydroxyalkyl group eg N,N-dimethyl ethanolamine (DMEA) .
- DMEA N,N-dimethyl ethanolamine
- the stabilising agent may be introduced to the quaternary ammonium material at any stage during its manufacture or after manufacture, eg on storage.
- the stabilising agent may be added in any form, as a powder direct to the molten quaternary ammonium material or as a solution in a suitable solvent, for instance isopropanol.
- the addition of the stabilising agent can take place during the synthesis of the quaternary ammonium material preferably following the quaternisation step.
- the addition may alternatively, or additionally, be made during storage of the quaternary ammonium material.
- the stabilising agent is most effectively introduced at any stage following the quaternisation step of the synthesis of the quaternary ammonium material.
- composition is in a liquid, molten or semi molten form containing less than 10% by weight of water.
- These compositions may be incorporated into a solid rinse conditioner which is preferably in a powdered or granular form.
- the compositions may also be diluted with water to produce a liquid rinse conditioner. Examples
- the reflectance was measured on a datacolor international Spectraflash SF600 plus reflectometer after 3 days storage at 82°C.
- DEQ di (2- [hardened tallow] oxyl oxyethyl) dimethyl ammonium chloride ex Hoechst. It includes approximately 10% mono ester and minor amounts of unquaternised amine/amine salt as well as approximately 2% fatty acid and 14% isopropanol.
- compositions comprising a quaternary ammonium compound counteracts decomposition at particularly high temperatures. This is indicated by the greatly increased R540 reflectance values found for samples of quaternary ammonium compound stored in admixture with urea .
- the following examples show the reduction in decomposition of the quaternary ammonium material by the reduction in liberation of alkyl halide on incorporation of a stabilising agent in accordance with the present invention.
- Alkyl halide is produced by the following decomposition reaction:
- R is a Cg to C 22 hydrocarbyl group, optionally interrupted by functional groups, e.g. ester [O-CO., CO.O], amide, ether, amine, carbonate) , optionally branched, optionally unsaturated and R is a Cg to C 40 hydrocarbyl group similarly defined.
- the chloromethane levels were determined by capillary gas chromatography .
- DEQ di (2- [hardened tallow] oxyl oxyethyl) dimethyl ammonium chloride ex Hoechst. It includes approximately 10% mono ester and minor amounts of unquaternised amine/amine salt as well as approximately 2% fatty acid and 14% isopropanol.
- DMEA was added to the DEQ following storage of the DEQ overnight at 82 °C. Chloromethane was determined by gas chromatography after a further day at 82 °C.
- DMEA is N,N-dimethylethanol amine (99% ex Aldrich)
- Glycerol was added at a level of 7.5% by weight to a sample of DEQ to produce example 4A.
- a control sample of DEQ which did not contain any glycerol (Comparative example 4B) and example 4A were sealed in separate Gas Chromatograph (GC) vials and were stored at 80.5°C. At the end of the storage period the level of x total' methyl chloride in each sample was measured. The results are given below.
- the above results demonstrate the ability of the stabilising agent, here glycerol, to reduce the level of MeCl in a quaternary ammonium material on closed, high temperature, storage.
- the level of MeCl measured here is the ⁇ total' level in a sealed system.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI9910550-0A BR9910550B1 (en) | 1998-05-18 | 1999-05-12 | stable composition comprising quaternary ammonium materials containing at least one ester group, process for stabilizing quaternary ammonium materials, solid rinse conditioner, liquid rinse conditioner, and process for reducing alkyl halide levels in ammonium material Quaternary. |
DE69925119T DE69925119T2 (en) | 1998-05-18 | 1999-05-12 | Stabilized quaternary ammonium compounds |
CA2329959A CA2329959C (en) | 1998-05-18 | 1999-05-12 | Stable quaternary ammonium compositions |
EP99929121A EP1080172B1 (en) | 1998-05-18 | 1999-05-12 | Stable quaternary ammonium compositions |
AU46045/99A AU4604599A (en) | 1998-05-18 | 1999-05-12 | Stable quaternary ammonium compositions |
HU0101902A HUP0101902A3 (en) | 1998-05-18 | 1999-05-12 | Stable composition containing quaternary ammonium compound, process for its preparation and compositions containing thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9810656.0 | 1998-05-18 | ||
GBGB9810656.0A GB9810656D0 (en) | 1998-05-18 | 1998-05-18 | Stable ammonium compositions |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999060082A1 true WO1999060082A1 (en) | 1999-11-25 |
Family
ID=10832261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/003367 WO1999060082A1 (en) | 1998-05-18 | 1999-05-12 | Stable quaternary ammonium compositions |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP1080172B1 (en) |
CN (1) | CN1280389C (en) |
AR (1) | AR019556A1 (en) |
AU (1) | AU4604599A (en) |
BR (1) | BR9910550B1 (en) |
CA (1) | CA2329959C (en) |
DE (1) | DE69925119T2 (en) |
ES (1) | ES2241289T3 (en) |
GB (1) | GB9810656D0 (en) |
HU (1) | HUP0101902A3 (en) |
TR (1) | TR200003385T2 (en) |
WO (1) | WO1999060082A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1493424A1 (en) * | 2002-04-08 | 2005-01-05 | Kao Corporation | Cosmetic hair preparation |
EP1584674A1 (en) * | 2004-03-29 | 2005-10-12 | Clariant GmbH | Easy-dispersible concentrate ester quat compositions |
WO2011032851A3 (en) * | 2009-09-15 | 2011-10-13 | Unilever Plc | Chelator stabilized cationic ammonium compounds and compositions comprising the same |
US8257720B2 (en) | 2009-04-20 | 2012-09-04 | Conopco, Inc. | Stabilized cationic ammonium compounds and compositions comprising the same |
US9445598B2 (en) | 2008-06-13 | 2016-09-20 | United Promotions, Inc. | Biocide compositions comprising quaternary ammonium and urea and methods for their use |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2454465A1 (en) * | 1974-11-16 | 1976-05-20 | Hoechst Ag | Powdery germ inhibiting soft rinsing compsns for textiles - contg cationic soft rinse, cationic disinfectant, urea and non ionic dispersant |
US4851138A (en) * | 1986-09-02 | 1989-07-25 | Akzo, N.V. | Fabric softening composition and detergent-composition comprising the same |
EP0332270A2 (en) * | 1988-03-11 | 1989-09-13 | Unilever N.V. | Fabric conditioning composition |
EP0547723A1 (en) * | 1991-12-18 | 1993-06-23 | Colgate-Palmolive Company | Free-flowing powder fabric softening composition and process for its manufacture |
US5282983A (en) * | 1990-08-22 | 1994-02-01 | Kao Corporation | Fabric softener composition and ammonium salt |
DE4307186A1 (en) * | 1993-03-08 | 1994-09-15 | Henkel Kgaa | Aqueous fabric softener composition |
US5543067A (en) * | 1992-10-27 | 1996-08-06 | The Procter & Gamble Company | Waterless self-emulsiviable biodegradable chemical softening composition useful in fibrous cellulosic materials |
DE19629666A1 (en) * | 1996-07-23 | 1998-01-29 | Henkel Kgaa | Process for the hydrophilic finishing of fibers or nonwovens |
-
1998
- 1998-05-18 GB GBGB9810656.0A patent/GB9810656D0/en not_active Ceased
-
1999
- 1999-05-12 HU HU0101902A patent/HUP0101902A3/en unknown
- 1999-05-12 EP EP99929121A patent/EP1080172B1/en not_active Expired - Lifetime
- 1999-05-12 CA CA2329959A patent/CA2329959C/en not_active Expired - Fee Related
- 1999-05-12 TR TR2000/03385T patent/TR200003385T2/en unknown
- 1999-05-12 AU AU46045/99A patent/AU4604599A/en not_active Abandoned
- 1999-05-12 WO PCT/EP1999/003367 patent/WO1999060082A1/en active IP Right Grant
- 1999-05-12 DE DE69925119T patent/DE69925119T2/en not_active Expired - Lifetime
- 1999-05-12 ES ES99929121T patent/ES2241289T3/en not_active Expired - Lifetime
- 1999-05-12 CN CN99806166.2A patent/CN1280389C/en not_active Expired - Fee Related
- 1999-05-12 BR BRPI9910550-0A patent/BR9910550B1/en not_active IP Right Cessation
- 1999-05-18 AR ARP990102346A patent/AR019556A1/en active IP Right Grant
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2454465A1 (en) * | 1974-11-16 | 1976-05-20 | Hoechst Ag | Powdery germ inhibiting soft rinsing compsns for textiles - contg cationic soft rinse, cationic disinfectant, urea and non ionic dispersant |
US4851138A (en) * | 1986-09-02 | 1989-07-25 | Akzo, N.V. | Fabric softening composition and detergent-composition comprising the same |
EP0332270A2 (en) * | 1988-03-11 | 1989-09-13 | Unilever N.V. | Fabric conditioning composition |
US5282983A (en) * | 1990-08-22 | 1994-02-01 | Kao Corporation | Fabric softener composition and ammonium salt |
EP0547723A1 (en) * | 1991-12-18 | 1993-06-23 | Colgate-Palmolive Company | Free-flowing powder fabric softening composition and process for its manufacture |
US5543067A (en) * | 1992-10-27 | 1996-08-06 | The Procter & Gamble Company | Waterless self-emulsiviable biodegradable chemical softening composition useful in fibrous cellulosic materials |
DE4307186A1 (en) * | 1993-03-08 | 1994-09-15 | Henkel Kgaa | Aqueous fabric softener composition |
DE19629666A1 (en) * | 1996-07-23 | 1998-01-29 | Henkel Kgaa | Process for the hydrophilic finishing of fibers or nonwovens |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1493424A1 (en) * | 2002-04-08 | 2005-01-05 | Kao Corporation | Cosmetic hair preparation |
EP1493424A4 (en) * | 2002-04-08 | 2007-09-05 | Kao Corp | Cosmetic hair preparation |
EP1584674A1 (en) * | 2004-03-29 | 2005-10-12 | Clariant GmbH | Easy-dispersible concentrate ester quat compositions |
WO2005095568A1 (en) * | 2004-03-29 | 2005-10-13 | Clariant Produkte (Deutschland) Gmbh | Easy-dispersible concentrate ester quat compositions |
JP2007537362A (en) * | 2004-03-29 | 2007-12-20 | クラリアント・プロドゥクテ・(ドイチュラント)・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Easy dispersible concentrated ester quaternary composition |
CN100451093C (en) * | 2004-03-29 | 2009-01-14 | 科莱恩产品(德国)有限公司 | Easy-dispersible concentrate ester quat compositions |
US9445598B2 (en) | 2008-06-13 | 2016-09-20 | United Promotions, Inc. | Biocide compositions comprising quaternary ammonium and urea and methods for their use |
US8257720B2 (en) | 2009-04-20 | 2012-09-04 | Conopco, Inc. | Stabilized cationic ammonium compounds and compositions comprising the same |
WO2011032851A3 (en) * | 2009-09-15 | 2011-10-13 | Unilever Plc | Chelator stabilized cationic ammonium compounds and compositions comprising the same |
US8324255B2 (en) | 2009-09-15 | 2012-12-04 | Conopco, Inc. | Chelator stabilized cationic ammonium compounds and compositions comprising the same |
US8765793B2 (en) | 2009-09-15 | 2014-07-01 | Conopco, Inc. | Compositions with skin benefit compounds and chelator stabilized cationic ammonium compounds |
Also Published As
Publication number | Publication date |
---|---|
CA2329959A1 (en) | 1999-11-25 |
BR9910550B1 (en) | 2009-05-05 |
CA2329959C (en) | 2010-04-27 |
GB9810656D0 (en) | 1998-07-15 |
CN1301292A (en) | 2001-06-27 |
HUP0101902A2 (en) | 2001-10-28 |
BR9910550A (en) | 2001-01-30 |
CN1280389C (en) | 2006-10-18 |
EP1080172A1 (en) | 2001-03-07 |
DE69925119D1 (en) | 2005-06-09 |
DE69925119T2 (en) | 2005-10-06 |
HUP0101902A3 (en) | 2002-08-28 |
ES2241289T3 (en) | 2005-10-16 |
AU4604599A (en) | 1999-12-06 |
TR200003385T2 (en) | 2001-02-21 |
EP1080172B1 (en) | 2005-05-04 |
AR019556A1 (en) | 2002-02-27 |
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