EP1702991A2 - Procédé pour le traitement hydrophobique du cuir en utilisant des silanes ayant des groupes alkyl et alkoxy et le cuir hydrophobe ainsi obtenu - Google Patents

Procédé pour le traitement hydrophobique du cuir en utilisant des silanes ayant des groupes alkyl et alkoxy et le cuir hydrophobe ainsi obtenu Download PDF

Info

Publication number
EP1702991A2
EP1702991A2 EP06004542A EP06004542A EP1702991A2 EP 1702991 A2 EP1702991 A2 EP 1702991A2 EP 06004542 A EP06004542 A EP 06004542A EP 06004542 A EP06004542 A EP 06004542A EP 1702991 A2 EP1702991 A2 EP 1702991A2
Authority
EP
European Patent Office
Prior art keywords
leather
radical
aliphatic
formula
saturated
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.)
Withdrawn
Application number
EP06004542A
Other languages
German (de)
English (en)
Other versions
EP1702991A3 (fr
Inventor
Juergen Dr. Reiners
Martin Dr. Kleban
Matthias Bley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanxess Deutschland GmbH
Original Assignee
Lanxess Deutschland GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lanxess Deutschland GmbH filed Critical Lanxess Deutschland GmbH
Publication of EP1702991A2 publication Critical patent/EP1702991A2/fr
Publication of EP1702991A3 publication Critical patent/EP1702991A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/08—Chemical tanning by organic agents
    • C14C3/18—Chemical tanning by organic agents using polycondensation products or precursors thereof
    • C14C3/20—Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/08—Chemical tanning by organic agents
    • C14C3/10—Vegetable tanning
    • C14C3/12—Vegetable tanning using purified or modified vegetable tanning agents
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes

Definitions

  • the invention relates to a method for hydrophobizing leather, in particular sole leather by means of alkylalkoxysilanes and hydrophobized leather.
  • tanning with trivalent chromium salts is the predominant technology in the manufacture of leather from hides and skins.
  • the process is inexpensive, simple and easy to reproduce.
  • the resulting leathers are characterized by high quality and a large achievable range of properties.
  • Tanning has been preserved here today with large amounts of vegetable or synthetic tannins, which in their traditional form in pits (“Altgrubengerbung”), in the modern version also in combination of pit and barrel (“Farbgang - Fassgerbung”) or can only be carried out in tanning barrels ("C-RFP process", Rational vegetable tanning, E. Lau, Leather, 1989, 51).
  • the DE-A 10250111 further describes a process for producing hydrophobized, chromium-free leather based on a substrate tanned with iron salts.
  • a leather produced with polymer tanning agents which according to the DE 19629986 can be equipped to a certain extent water-repellent.
  • these are exclusively very thin, very soft leathers that are especially designed for use as upholstery leather.
  • neither vegetable nor synthetic tannins may be used in this process, which severely limits the achievable possible leather properties.
  • a common feature of the active ingredients of all known hydrophobizing systems is that they make leather not only water repellent, but also soft and supple. Therefore, they can not be used in the required amount if the technical requirements for the leather article require a very high strength and durability such. B. for shoe soles.
  • the aim of the invention is therefore an agent for the hydrophobic finish of vegetable and / or synthetic tanned leather, which completely penetrates the leather cross section, effective in the leather too fix, the leather does not soften and ideally not in the tanning but on the finished tanned and dried leather can be used.
  • the organically tanned, in particular vegetable and / or synthetic tanned leather are preferably characterized in that at least 20 weight percent, preferably at least 30 weight percent of organic tanning agents, in particular vegetable tannins and / or synthetic tanning agents such as condensates of aromatic sulfonic acids or resin tanning agents are used for their preparation , And in a particularly preferred form in addition, no mineral tanning agents, in particular chromium salts, are used.
  • An overview of the chemistry and definition of these classes of tanning agents can be found eg. In Theory and Practice of Organic Tanning Agents, G. Reich, Das Leder, 1996, 74-83 and 157-171 , The purpose of this leather is primarily the production of soles, but also leather items such as bags, straps, belts, bridles, saddles u. ä.
  • the suitable for this application synthetic tanning agents are, for. B. to water-soluble condensation products of sulfonated aromatics, formaldehyde and optionally other substances such as aromatics, urea and / or urea derivatives. Preference is given here to products based on the condensation of naphthalenesulfonic acids, ditolyl ether sulfonic acids, phenolsulfonic acids, dihydroxydiphenylsulfone and phenol, and combinations of these raw materials with formaldehyde and optionally urea or urea derivatives.
  • resin tanners condensation products of nitrogen-containing compounds such.
  • urea dicyanamide or melamine with formaldehyde and / or other aldehydes and optionally sulfites.
  • Vegetabilgerstoffe are derived from vegetable sources tannins from the classes of condensed tannins or hydrolyzable tannins z. As chestnut extract, Mimosa, Tara or Quebracho.
  • the leather to be hydrophobic is preferably "chromium-free", "chromium-free” in the sense of the present invention meaning that it has not been tanned with chromium salts.
  • the maximum amount of chromium e.g. caused by natural sources of Cr contents in animal skins or chromium-containing dyes in leather is less than 2000 ppm.
  • the maximum amount of chromium in the leather is preferably less than 100 ppm.
  • alkoxysilanes of the formula I dialkyldimethoxysilane, alkyltrimethoxysilane, dialkyldiethoxysilane, alkyltriethoxysilane or mixtures thereof, wherein alkyl is C 6 -C 20 -alkyl, very particularly preferred are hexadecyltrimethoxysilane, octadecyltrimethoxysilane, hexadecyltriethoxysilane, octadecyltriethoxysilane or mixtures thereof.
  • alkylalkoxysilanes of the formula I used are in their pure form colorless or yellowish, low-viscosity liquids having viscosities in the range from 0.6 to 10,000 mPas, preferably 0.8 to 1000 mPas and a boiling point of> 100 ° C., more preferably> 180 ° C. ,
  • alkylalkoxysilanes hydrolyze to the alkylsilanol, which can polymerize with elimination of water or can bind to nucleophilic reagents.
  • This reaction may, for. B. be catalyzed by acids.
  • alkylalkoxysilanes of the formula I suitable for use as water repellents for organically, in particular vegetable or synthetic tanned leathers, which as product of the hydrolysis and subsequent reaction give a waxy substrate, preferably with a melting point above 25 ° C., most preferably above 50 ° C.
  • the invention furthermore relates to a process for producing the leather according to the invention, which comprises treating organically tanned leather with a preparation comprising at least one alkylalkoxysilane of the formula I, in particular applying the preparation superficially.
  • the hydrophobing it is preferable to apply to the finished tanned and dried (ie a residual moisture content of ⁇ 30% by weight, preferably ⁇ 20% by weight) of one or both sides, a total of 2 to 30% by weight, preferably 5 to 30% by weight. 15 wt .-% applied.
  • the order of the substance mixture is preferably carried out at 0 ° C - 60 ° C.
  • the application can be done, for example, by spraying, knife coating, casting, printing or dipping.
  • various solvents and / or oils may be added to the alkylalkoxysilanes used.
  • alcohols such as methanol, ethanol, propanol or isopropanol and with alkylalkoxysilanes non-reactive solvents such as aliphatic or aromatic hydrocarbons, halogenated hydrocarbons, ethers, esters or low molecular weight silicone oils, especially gasolines, white oils, polysiloxanes and ethyl acetate and mixtures of these components.
  • B highly viscous mineral oils, fats, waxes or higher molecular weight silicone oils, in particular polysiloxanes without and with functionalization by z. As hydroxy, amino or carboxy functionalities and mixtures of these components.
  • hydrophobing it is preferable for the hydrophobing to use a preparation containing at least 30 wt .-%, preferably at least 50 wt .-%, in particular at least 80 wt .-%, in particular at least 95 wt .-% of alkylalkoxysilanes of the formula I.
  • the leather is flashed off if necessary, if volatile components are present in the product mixture, and the hydrophobizing agent is fixed, for example by storing the leather.
  • the residual moisture contained in the leather and introduced with the tanning acid is sufficient as a medium for the hydrolysis reaction of the alkoxy functions on the silane, which then leads to crosslinking of the silicon units with each other or with nucleophilic functionalities in the leather.
  • the reaction rate is dependent on the alkoxy radical present. In another embodiment, this reaction may be accelerated by steaming or air conditioning in a humid and / or acidic atmosphere.
  • Suitable acids are, for. As readily volatile organic acids such as formic acid or acetic acid, but also volatile inorganic acids such. Hydrochloric acid.
  • the leathers according to the invention preferably have a drop-fastness of at least 30 minutes, and a water absorption in the Kubelka test (DIN EN 12 990) of less than 35% at 24 hours.
  • a drop of water of 0.2 ml volume is applied to the leather surface (grain side) and the time is measured until the drop is completely drawn into the leather. Higher times correspond to a better water repellency.
  • the leather according to the invention is outstandingly suitable for use for shoe production, in particular as a shoe sole leather and as a belt, saddle, belt and pocket leather.
  • the invention furthermore relates to the leather obtainable by the process according to the invention.
  • the invention also relates to the use of alkylalkoxysilanes of the formula I for the hydrophobization of leather tanned with organic tanning agents.
  • All weights in the tints refer to puff weight, weights in the hydrophobing to the weight of the tanned and dried leather.
  • Stalked and pickled cattle (German cattle, 4 mm gap) are in a commercial Gerbank in 80% water for 2 h with 8% sodium chloride, 0.7% formic acid and 0.9% sulfuric acid pickled and then for 12 h with 6% of a synthetic pretanned agent (Ditolylethersulfonkla-Diyhdroxydiphenylsulfon-formaldehyde condensate, TANIGAN® CK, LANXESS Germany GmbH) pretreated. The fleet is drained, washed twice and refloated with 30% water.
  • a synthetic pretanned agent Ditolylethersulfonkladre-Diyhdroxydiphenylsulfon-formaldehyde condensate, TANIGAN® CK, LANXESS Germany GmbH
  • a synthetic tanning agent naphthalenesulfonic acid-Diyhdroxydiphenylsulfon-formaldehyde condensate, TANIGAN® OS, LANXESS Germany GmbH
  • Mimosa tannin 5% chestnut tanning agent and 1% of a claw oil-based fatliquor and after one hour further
  • synthetic Tanning agent 8% Mimosa tannin, 5% chestnut tanning agent and 2% of a polymeric resin tanning agent (polyacrylic acid, Leukotan® 1028, Rohm and Haas Corp.) were added.
  • composition of the preparation data in% by weight ingredients Bsp.1A Ex. 1B Bsp.1C Bsp.1D Bsp.1E Bsp.1F Bsp.1G Bsp.1H Bsp.1I Ex.
  • the sole leather (leather 1) of 4.5 to 5 mm thickness was treated as shown in the following table with different preparations of Example 1 and after complete penetration of the product (test on the section) for 10 days at 65% humidity and 25 ° C conditioned ,
  • the resulting finished leathers have comparable or slightly improved stiffness to the untreated reference.
  • the intrinsic color is comparable or only slightly darker.
  • a drop of water of 0.2 ml volume is applied to the leather surface (grain side) and measured the time until the drop is completely absorbed into the leather. Higher times correspond to a better water repellency.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
EP06004542A 2005-03-17 2006-03-07 Procédé pour le traitement hydrophobique du cuir en utilisant des silanes ayant des groupes alkyl et alkoxy et le cuir hydrophobe ainsi obtenu Withdrawn EP1702991A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005012329A DE102005012329A1 (de) 2005-03-17 2005-03-17 Verfahren zur Hydrophobierung von Leder mittels Alkylalkoxysilanen sowie hydrophobiertes Leder

Publications (2)

Publication Number Publication Date
EP1702991A2 true EP1702991A2 (fr) 2006-09-20
EP1702991A3 EP1702991A3 (fr) 2008-03-19

Family

ID=36644861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06004542A Withdrawn EP1702991A3 (fr) 2005-03-17 2006-03-07 Procédé pour le traitement hydrophobique du cuir en utilisant des silanes ayant des groupes alkyl et alkoxy et le cuir hydrophobe ainsi obtenu

Country Status (3)

Country Link
US (1) US20060207032A1 (fr)
EP (1) EP1702991A3 (fr)
DE (1) DE102005012329A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011147959A2 (fr) 2010-05-28 2011-12-01 Momentive Performance Materials Gmbh Hydrophobisation de matériaux fibreux au moyen de polyorganosiloxanes
WO2025215621A3 (fr) * 2024-04-12 2025-12-18 Tmg - Tecidos Plastificados E Outros Revestimentos Para A Indústria Automóvel, S.A Composition de revêtement de cuir artificiel, procédés et utilisations associés

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286561B2 (en) 2008-06-27 2012-10-16 Ssw Holding Company, Inc. Spill containing refrigerator shelf assembly
US11786036B2 (en) 2008-06-27 2023-10-17 Ssw Advanced Technologies, Llc Spill containing refrigerator shelf assembly
AU2009302329B2 (en) 2008-10-07 2015-10-29 Ssw Advanced Technologies, Llc Spill resistant surfaces having hydrophobic and oleophobic borders
ES2613885T3 (es) 2009-11-04 2017-05-26 Ssw Holding Company, Inc. Superficies de aparatos de cocción que tienen un patrón de confinamiento de salpicaduras y procedimientos de fabricación de las mismas
JP5858441B2 (ja) 2010-03-15 2016-02-10 ロス テクノロジー コーポレーション．Ｒｏｓｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｒｐｏｒａｔｉｏｎ プランジャーおよび疎水性表面を得るための方法
JP2014512417A (ja) 2011-02-21 2014-05-22 ロス テクノロジー コーポレーション． 低ｖｏｃ結合剤系を含む超疎水性および疎油性被覆物
DE102011085428A1 (de) 2011-10-28 2013-05-02 Schott Ag Einlegeboden
EP2791255B1 (fr) 2011-12-15 2017-11-01 Ross Technology Corporation Composition et revêtement pour une performance superhydrophobe
EP2864430A4 (fr) 2012-06-25 2016-04-13 Ross Technology Corp Revêtements élastomères ayant des propriétés hydrophobes et/ou oléophobes
EP2865767B1 (fr) * 2013-10-25 2016-02-03 Albert Kreca Procédé pur façonner une empeigne en une seule pièce
DE102016000243A1 (de) 2016-01-12 2017-07-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Lederhydrophobierungsverfahren und damit hergestelltes Leder
CN115418415A (zh) * 2022-08-10 2022-12-02 上海金狮化工有限公司 一种绵泡加脂剂及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874431A (en) 1988-07-14 1989-10-17 Dow Corning Corporation Low volatility water repellents
WO1996015276A1 (fr) 1994-11-15 1996-05-23 Basf Aktiengesellschaft Procede de preparation de cuir et de fourrures au moyen de matieres tannantes polymeres
DE19629986A1 (de) 1996-07-25 1998-01-29 Basf Ag Verfahren zum Hydrophobieren von mit Polymergerbstoffen gegerbten Ledern und Pelzfellen
WO2001055456A1 (fr) 2000-01-27 2001-08-02 Bayer Aktiengesellschaft Polysiloxanes utilises pour l'impermeabilisation
WO2003064707A1 (fr) 2002-01-31 2003-08-07 Tfl Ledertechnik Gmbh Compositions et leur utilisation afin de d'impermeabiliser le cuir ou les fourrures, les textiles et autres matieres fibreuses
DE10250111A1 (de) 2002-10-28 2004-05-06 Bayer Ag Chromfreies, wasserdichtes Leder
DE10306748A1 (de) 2003-02-17 2004-08-26 Basf Ag Verfahren zur Hydrophobierung von Leder und Pelzfellen
DE10320779A1 (de) 2003-05-09 2004-11-18 Degussa Ag Korrosionsschutz auf Metallen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB777078A (en) * 1954-02-08 1957-06-19 Gen Electric Improvements relating to the treatment of leather
US5954869A (en) * 1997-05-07 1999-09-21 Bioshield Technologies, Inc. Water-stabilized organosilane compounds and methods for using the same
EP1352936A1 (fr) * 2002-04-11 2003-10-15 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Revêtement multi-couche à propriétés graduelles pour des substrats flexibles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874431A (en) 1988-07-14 1989-10-17 Dow Corning Corporation Low volatility water repellents
WO1996015276A1 (fr) 1994-11-15 1996-05-23 Basf Aktiengesellschaft Procede de preparation de cuir et de fourrures au moyen de matieres tannantes polymeres
DE19629986A1 (de) 1996-07-25 1998-01-29 Basf Ag Verfahren zum Hydrophobieren von mit Polymergerbstoffen gegerbten Ledern und Pelzfellen
WO2001055456A1 (fr) 2000-01-27 2001-08-02 Bayer Aktiengesellschaft Polysiloxanes utilises pour l'impermeabilisation
WO2003064707A1 (fr) 2002-01-31 2003-08-07 Tfl Ledertechnik Gmbh Compositions et leur utilisation afin de d'impermeabiliser le cuir ou les fourrures, les textiles et autres matieres fibreuses
DE10250111A1 (de) 2002-10-28 2004-05-06 Bayer Ag Chromfreies, wasserdichtes Leder
DE10306748A1 (de) 2003-02-17 2004-08-26 Basf Ag Verfahren zur Hydrophobierung von Leder und Pelzfellen
DE10320779A1 (de) 2003-05-09 2004-11-18 Degussa Ag Korrosionsschutz auf Metallen

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
E. LAU, LEATHER, 1989, pages 51
G. REICH, DAS LEDER, 1996, pages 74 - 83
LEATHER INTERNATIONAL, vol. 2003, 2002, pages 41 - 44
M. KLEBAN, JALCA, 2002, pages 487 - 495
P. DANISCH, JALCA, 1996, pages 120 - 125
WORLD LEATHER, 2003, pages 33 - 35

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011147959A2 (fr) 2010-05-28 2011-12-01 Momentive Performance Materials Gmbh Hydrophobisation de matériaux fibreux au moyen de polyorganosiloxanes
WO2025215621A3 (fr) * 2024-04-12 2025-12-18 Tmg - Tecidos Plastificados E Outros Revestimentos Para A Indústria Automóvel, S.A Composition de revêtement de cuir artificiel, procédés et utilisations associés

Also Published As

Publication number Publication date
EP1702991A3 (fr) 2008-03-19
US20060207032A1 (en) 2006-09-21
DE102005012329A1 (de) 2006-09-28

Similar Documents

Publication Publication Date Title
US4762522A (en) Agent for treatment of hides and pelts
EP1702991A2 (fr) Procédé pour le traitement hydrophobique du cuir en utilisant des silanes ayant des groupes alkyl et alkoxy et le cuir hydrophobe ainsi obtenu
EP1108765B1 (fr) Hydrophobisation avec des polysiloxanes ayant des groupes carboxyliques
EP0849365B1 (fr) Agent pour la préparation du cuir
US8062540B2 (en) Low-VOC leather
DE3013912A1 (de) Polymerprodukte zur behandlung von bloessen und leder
EP2607500A1 (fr) Procédé de fabrication de cuivre utilisant un polysaccharide dérivé d'amidon oxydé et compositions le contenant
EP2110446B1 (fr) Tannage de cuirs et de peaux
EP1416057A1 (fr) Cuir sans chrome, imperméable à l'eau
EP0814168A1 (fr) Procédé de tannage du cuir
DE102004050284A1 (de) Isocyanat-basierende Gerbstoffe
WO2013023979A1 (fr) Procédé pour teinter des substrats à base de fibres de collagène
EP3402905B1 (fr) Procédé de l'hydrophobisation de cuir et cuir ainsi obtenu
DE60022673T2 (de) Tanninfleckenhemmende überzugszusammensetzung
US3038818A (en) Method of producing leather with improved water resistance and article resulting therefrom
DE19860610B4 (de) Verfahren zur Inhibierung der Cr(VI)-Bildung in chromgegerbtem Leder und Verwendung von Antioxidantien hierfür
EP4240896A1 (fr) Composition et procédé de teinture du cuir au moyen de polycarbodiimides et de teintures
EP0526815A1 (fr) Procédé de tannage/imprégnation et/ou post-tannage du cuir
EP1118682B1 (fr) Préparations d'agents de tannage/ retannage
EP3390673B1 (fr) Procede destine a la fabrication de semi-produits en cuir ou en fourrure
EP0216271A2 (fr) Utilisation de dérivés de l'acide phosphonique comme adjuvants dans la fabrication du cuir
DE2709507C3 (de) Verfahren zur Verbesserung der Eigenschaften von Leder
EP1896620B1 (fr) Procede de fabrication de cuir
EP2351736B1 (fr) Solutions de thioéthers et leur utilisation dans la fabrication de cuir
DE10028142A1 (de) Chromgerbverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

RIC1 Information provided on ipc code assigned before grant

Ipc: C14C 3/20 20060101ALI20080214BHEP

Ipc: C14C 3/12 20060101ALI20080214BHEP

Ipc: C14C 9/00 20060101AFI20060714BHEP

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080920

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566